JP4193934B2 - Farm work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a farm vehicle.
[0002]
[Prior art]
Some farm vehicles such as tractors fix the front grille on the front side of the hood that covers the outside of the engine to the body frame in a detachable manner.
[0003]
[0004]
[Problems to be solved by the invention]
An object of the present invention is to improve a structure for attaching and detaching a front grill in an agricultural work vehicle as described above.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is an agricultural vehicle for detachably fixing a front grill on the front side of a bonnet covering the outside of an engine to a vehicle body frame, and is provided at a lower portion of the front grill. The engaging plate is engaged with the lateral pin of the vehicle body frame, and the engagement shaft member provided on the upper inner surface of the front grille is engaged with the rod-type grill lock mechanism on the vehicle body frame side. configured to, while the handle portion for unlocking the grill lock mechanism is configured to be projected forward of the vehicle body frame 45, the grill lock mechanism, the engagement made coaxial members of the front grille side A locking plate for engaging and disengaging, a first rod extending laterally from the locking plate, a third rod extending forward and backward under the front grille, and the first rod And comprises a second rod longitudinal connecting the third rod, the tip portion of the third rod protrude in front of the body frame, forming said handle portion for unlocking, and said body frame A compression spring is interposed between the second rods, the lock plate is held in a locked state by the compression spring, and the handle portion is pulled forward to operate the lock plate against the compression spring. Is configured to be unlocked by rotating about the rotation axis .
[0006]
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external side view of a tractor, in which a front mission case 2 is fixed to the front part of a pair of left and right square cylindrical track frames 1 and a left and right drive sprocket 4 is pivotally supported on left and right axles 3 of the front mission case 2. A tension roller 6 is provided at the rear of the track frame 1 via a tension frame 5, and a traveling crawler 9 is wound around the drive sprocket 4 and the tension roller 6 via an equalizer wheel 7 and an idler 8.
[0008]
An engine 10 is mounted above the front part between the left and right track frames 1, the outside of the engine 10 is covered with a bonnet 11, a rear mission case 12 is provided between the left and right track frames 1, and a lift arm 13 is provided. A hydraulic lifting cylinder 14, a top link 15 and a lower link 16 are provided in the rear mission case 12, and a rear working machine such as a tillage rotary working machine or a plow is mounted on the links 15, 16 so as to be lifted and removed freely. Have the farming work done.
[0009]
Further, a cabin 17 is installed on the rear side of the bonnet 11 and on the upper side of the rear mission case 12. A handle column 18 and a brake pedal 19 are provided in the front portion of the cabin 17, so that the handle column 18 can be tilted freely. A round steering handle 20 is rotatably attached, and a driver seat 21 on which an operator sits is installed in the rear portion of the cabin 17.
[0010]
As shown in FIG. 2 to FIG. 5, a main transmission lever 23, an accelerator lever 24, a work machine up / down lever 25, a hydraulic operation lever 26, etc. Various levers 27 are provided, and a control box 28 for performing automatic horizontal control of the rotary working machine, an automatic switch 29 for turning on and off the control, a tilling dial 30, a lift of the rotary working machine, turning of the machine body, etc. A switch 31 for decelerating the vehicle speed in conjunction with the PTO, a PTO interlocking switch 32 for interlocking or independent switching of the PTO with respect to the main clutch, a front wheel drive switch 33 for switching between 2WD and 4WD, and manual horizontal control The manual switch 34 for performing the operation and the operation switches 36 such as the PTO drive switch 35 are centrally arranged on the right side column 22, and these The bars such 27 and switches 36 as well as better check from the driver's seat 21 position, is provided so as to permit erroneous without correct operation.
[0011]
Further, the display panel 37 above the handle column 18 is formed by a liquid crystal display 38. On the display surface 39 of the liquid crystal display 38, a rotation display portion 39a for displaying the engine speed on a liquid crystal and a fuel remaining amount on the liquid crystal display. A fuel display unit 39b for displaying the speed, a speed display unit 39c for displaying the speed numerically on a liquid crystal, a warning display unit 39d for flashing display when there is an abnormality, and the like. It is provided so as to switch to various images such as a working depth setting and a screen for displaying the rotation speed of the PTO shaft on a liquid crystal display.
[0012]
The display changeover switch 40 is installed in the grip portion 41 of the main transmission lever 23 which is frequently used. When the rotary work machine is mounted on the links 15 and 16, the work machine up / down switch for raising and lowering the rotary work machine. 42 and an automatic raising switch 43 that automatically raises the rotary work machine when the machine turns or reverses, is installed in the grip part 41, and a changeover switch 40 is installed on the right side of the front face of the grip part 41 (on the elevation switch 42 side). The changeover switch 40 is arranged at a position where it cannot be erroneously operated by a normal operation of the main transmission lever 23 (a position where it cannot be pushed), so that the changeover switch 40 can be operated properly.
[0013]
As apparent from the above, the display surface 39 of the liquid crystal display 38 is switched in the agricultural vehicle in which the liquid crystal display 38 for displaying the work information on the liquid crystal display 38 is disposed in the handle column 18 which is the driving operation unit in front of the driver's seat 20. A display changeover switch 40, which is a display changeover member, is provided on the main transmission lever 23, which is an operation lever with a high operation frequency. When the display surface 39 of the liquid crystal display 38 is changed, the operator can change his / her eyes and working posture. Without changing, it is possible to switch the display surface 39 accurately while maintaining the operation state of the main transmission lever 23, and to perform a good work without causing an erroneous operation.
[0014]
Further, the display changeover switch 40 is provided in the grip portion 41 of the main transmission lever 23 which is a transmission lever for changing the vehicle speed of the work vehicle, and the grip portion 41 of the main transmission lever 23 which is always required to be operated is gripped. The display surface 39 can be easily switched as it is, and the stability of the work can be improved.
[0015]
As shown in FIGS. 6 to 9, a grill lock mechanism 46 for fixing the front grill 44 on the front side of the bonnet 11 to the vehicle body frame 45 side is provided. The front engaging shaft member 48 is engaged with the lock plate 54 on the vehicle body frame 45 side, and the front grille 44 is fixedly disposed on the front side of the bonnet 11.
[0016]
Further, the hook plate 49 is fixed to the upper surface of the rectangular frame 51 near the radiator 50 of the engine 10 via the bracket 52, and the shaft member 48 of the grille 44 is engaged with the engagement groove 53 formed in the hook plate 49, The shaft member 48 is engaged and held by the lock plate 54 of the lock mechanism 45. The lock plate 54 is rotatably attached to the upper surface of the hook plate 49 via the rotation shaft 55, and the lock groove 56 on the distal end side of the lock plate 54 is formed. When engaging with the shaft member 48, the movement of the shaft member 48 in the forward direction is restricted by the lock plate 54.
[0017]
Further, a first rod 58 that is movable in the left-right direction above the frame 51 via a guide 57, a second rod 59 that is movable in the vertical direction on the left outer side of the frame 51 , and a vehicle body below the front grill 44 The lock mechanism 46 includes a third rod 60 that is movable along the front-rear direction of the frame 45, and a bell crank type first rocking plate 63 that is disposed on the upper left surface of the frame 51 via a bracket 61 and a pivot 62. The lock plate 54 is linked by a second rod 59 to a bell crank type second rocking plate 65 and a first rocking plate 63 which are arranged on the vehicle body frame 45 via a pivot 64 by the first rod 58, and The tip of the third rod 60 that connects the rear end to the second swing plate 65 protrudes forward of the vehicle body frame 45 and is bent inward to form a handle portion 60a for unlocking. B The lock plate 54 is normally held in a closed (locked) state by a compression spring 66 interposed between the doors 59, and the lock plate 54 is rotated against the spring 66 when the handle portion 60a is pulled forward. The engaging groove 53 is opened by rotating counterclockwise about the shaft 55.
[0018]
As described above, the lock plate 54 is securely opened and closed by the lock mechanism 46 using the rods 58, 59, and 60 as compared with the configuration in which the lock plate 54 is opened and closed by the wire. On the other hand, the lock plate 54 is rotated in the tangential direction to reduce the load and loss, and the handle portion 60a is disposed in front of the front grille 44 so that the lock plate 54 can be easily opened and closed.
[0019]
In addition, the spring 66 applies a spring force in one direction (upward) to the second rod 59 so that each rod 58, 59, 60 has no play to prevent generation of noise and the like. A tension rubber 68 is interposed between the through hole 67 of the third rod 60 formed in the front plate 45a of the vehicle body frame 45 and the third rod 60, and the third rod 60 having the handle portion 60a generates noise due to vibration or the like. It is prevented from occurring.
[0020]
Furthermore, the operating direction of the handle portion 60a when the lock plate 54 is opened is changed from the pulling direction to the pushing direction by reversing the swinging direction of either the first or second swinging plate 63 or 65. Can be made possible.
[0021]
【The invention's effect】
As is apparent from the above embodiments, the present invention is an agricultural vehicle for detachably fixing the front grill 44 on the front side of the bonnet 11 that covers the outside of the engine 10 to the vehicle body frame 45. A locking plate 47 provided on the inner surface of the vehicle body frame 45 is engaged with a lateral pin 47a, and an engagement shaft member 48 provided on the inner surface of the front grill 44 is connected to a rod-type grill on the vehicle body frame 45 side. configured to engage the locking mechanism 46, while the handle portion 60a to unlock the grill lock mechanism 46 is configured to be projected forward of the vehicle body frame 45, the grill lock mechanism 46, a front grill A lock plate 54 for engaging and disengaging the engagement shaft member 48 on the 44 side, a first rod 58 extending laterally from the lock plate 54, A third rod 60 extending in the front-rear direction below the grille 44 and a vertically long second rod 59 connecting the first and third rods 58, 60 are provided, and the tip of the third rod 60 is located in front of the vehicle body frame 45. The handle portion 60a for releasing the lock is formed , a compression spring 66 is interposed between the vehicle body frame 45 and the second rod 59, and the lock plate 54 is held in the locked state by the compression spring 66. By pulling the portion 60a forward, the lock plate 54 is pivoted about the pivot shaft 55 against the compression spring 66 and unlocked. Compared with the configuration in which the lock is released, the rod-type grill lock mechanism 46 can perform a reliable lock / unlock operation, and the handle portion 6 is disposed in front of the front grill 44. By placing a there is an effect that facilitates the operation of the grill lock mechanism 46.
[0022]
[Brief description of the drawings]
FIG. 1 is an overall side view of a tractor.
FIG. 2 is an explanatory side view of a right side column part.
FIG. 3 is an explanatory plan view of a right side column portion.
FIG. 4 is an explanatory diagram of a steering handle portion.
FIG. 5 is an explanatory diagram of a main transmission lever portion.
FIG. 6 is a side view of a front grill part.
FIG. 7 is an explanatory side view of a grill lock mechanism.
FIG. 8 is an explanatory plan view of a grill lock mechanism.
FIG. 9 is an explanatory view showing an operating state of the grill lock mechanism.
[Explanation of symbols]
18 Steering column (operating part)
20 Driver's seat 23 Main transmission lever (control lever)
38 Liquid crystal display 39 Display surface 40 Changeover switch (switching member)
41 Grip part

Claims (1)

A farm work vehicle that detachably fixes a front grille 44 on the front side of the bonnet 11 that covers the outside of the engine 10 to a vehicle body frame 45,
A locking plate 47 provided at the lower part of the front grill 44 is engaged with a lateral pin 47a of the vehicle body frame 45, and an engagement shaft member 48 provided at the upper part of the inner surface of the front grill 44 is connected to the vehicle body frame. configured to engage the grill lock mechanism 46 of the rod type in the 45 side, while the handle portion 60a to unlock the grill lock mechanism 46 is configured to be projected forward of the vehicle body frame 45 ,
The grill lock mechanism 46 includes a lock plate 54 for engaging and disengaging the engagement shaft member 48 on the front grill 44 side, a first rod 58 extending laterally from the lock plate 54, and a lower portion of the front grill 44. And a longitudinally long second rod 59 connecting the first and third rods 58 and 60, and the tip of the third rod 60 is located in front of the vehicle body frame 45. Projecting and forming the handle portion 60a for unlocking ,
By inserting a compression spring 66 between the vehicle body frame 45 and the second rod 59, holding the lock plate 54 in a locked state by the compression spring 66, and pulling the handle portion 60a forward, An agricultural work vehicle configured to release the lock by rotating the lock plate 54 about a rotation shaft 55 against the compression spring 66 .

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