JPS6343189Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a driving control device for a tractor.

(Prior Art) A tractor's driving control device is generally spaced apart in the longitudinal direction, with a steering handle on the front side and a seat on the rear side, so that the tractor is operated in a forward driving position. .

In this case, the driving system gear shift lever was provided in a so-called series arrangement between the steering wheel and the seat.

(Problem to be solved by the invention) However, tractors are required to perform a variety of tasks, and therefore, it is necessary to operate the tractor not only in a forward driving position but also in a backward driving position. Conventional technology, in which various speed change levers and seats are arranged in series, allows only a forward-facing driving position and does not allow backward-facing driving.

In addition, by placing control levers of the same type on the front and rear of the seat, and making the seat swivelable,
Technology that enables forward and backward driving has been adopted in construction machinery vehicles. However, this technology requires a set of control lever devices and is structurally complex, and when applied to a tractor, special work is required to narrow the entrance and exit, making it unapplicable in reality. It is possible.

Further, for tractors equipped with a cabin that encloses a steering wheel, a seat, etc., there is a legal regulation that the height above the ground is 2 m or less when traveling on public roads. When making the tractor a forward and backward drive type, if the reverse seat and the forward seat are at the same height, it will be difficult for the operator to get on and off, and it will also be difficult to see the work status of the rear-mounted work equipment. In addition, if the reverse seat is made higher than the forward seat, the operator sitting in the reverse seat will have his head hit the canopy of the cabin, which is kept at a height of 2 meters or less.

The present invention allows the steering wheel, seat, and gear lever to be easily changed between a forward driving position and a rearward driving position, even if the steering wheel, seat, and gear shift lever are all in one set. The purpose is to make it possible to operate the gear shift lever in a stable position rather than in an unreasonable position, to eliminate obstacles when getting on and off the vehicle, and to improve the comfort of the vehicle.

Another object of this invention is to improve safety and comfort while satisfying legal regulations by creating a space between the operator's head and the cabin roof to eliminate overhead obstructions, even though the rearward-facing driving position is higher than the forward-facing driving position to expand the field of vision when driving backward.

(Means for Solving the Problems) The present invention includes a bonnet that covers the engine, a pair of left and right rear wheel fenders, and a steering handle for forward driving that is erected on the vehicle body on the rear side of the bonnet. between the rear wheel fenders behind the handlebars,
In order to achieve the stated purpose, the following technical features are provided in a tractor equipped with a forward-facing driver's seat, further equipped with a gear shift lever for operating a transmission, and having a cabin surrounding the steering handle, the seat and the gear shift lever. We are taking measures.

That is, the present invention provides a first mounting part for the steering wheel for forward-facing driving and a second mounting part for the seat for rear-facing driving on the rear side of the bonnet, and a second mounting part for the seat for forward-facing driving between the rear wheel fenders. A first mounting part and a second mounting part of a steering handle for rearward driving are provided, and the steering handle and the seat are detachably attached to the corresponding mounting parts, so that the steering wheel and the seat can be freely attached to and detached from each other for a forward driving position and a rearward driving position. The position can be changed, and the seat in the rearward-facing driving position is located higher than the seat in the forward-facing driving position, and the gear shift lever is located on one side of the steering wheel and the seat, which are spaced apart from each other. The cabin is located at a position where it can be operated from the seat in either the front or rear driving position.Furthermore, the cabin is provided with a canopy on the top of the cabin body, the rear part of the canopy is pivotally supported on the cabin body, and the canopy is The front part of the canopy can be rotated upward to form a desired space above the driver's head in a seat in a rearward-facing driving position. and a retractable cover for closing the opening between the canopy and the cabin body, and the canopy is characterized in that the canopy is held in a rearward downward tilting position when the front part is raised.

(Function) When driving the tractor forward, place the steering handle upright on the first handle mounting part, fix the seat on the first seat mounting part, and move the handle to the front and the seat to the rear. It is done by placing.

In this case, the driver places his feet on the left and right steps for forward driving when operating the vehicle.

When driving the tractor backwards, remove the steering handle from the first handle mounting part, and install the removed steering handle upright on the second handle mounting part provided between the left and right rear wheel fenders, and attach the steering handle to the seat. The seat is removed from the first attachment part, and the removed seat is fixed to the second attachment part for the seat on the rear upper surface side of the bonnet, and the handle is placed on the rear side and the seat is placed on the front side.

In this case, the driver places his/her feet on the backward driving step section to operate the vehicle.

In both forward and backward driving, the speed change lever is located on one side of the seat and the steering wheel, so the driver can change the speed.

Furthermore, when driving backwards, the seat is located at a higher position than when driving forwards, so that the rear of the tractor can be seen within the field of view, making it possible to work backwards with certainty.

Furthermore, the canopy of the cabin is pivoted at the rear and pivots upward at the front, and is held in the raised position by the holding means, so the seat position when driving backwards can be moved forward. Even if the seat is higher than when driving, a space is created between the head of the operator sitting in the seat and the canopy, ensuring safety and allowing one cabin to be used for driving on public roads and for backward work. It becomes possible. In addition, a telescopic cover is provided between the canopy and the cabin body to close the opening formed between the raised canopy and the cabin body, so rainwater, dust, etc. can be prevented from entering the cabin. Intrusion can be prevented, and the cover is stretchable, allowing the canopy to move up and down.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the embodiment shown in FIGS. 1 to 4, a forward-reverse tractor 1 has a vehicle body 5 composed of an engine 2, a clutch housing 3, a transmission case 4, etc., and a pair of left and right frames fixed to the engine 2. A radiator 7 is mounted on the vehicle 6, and a front axle 8 is supported.

Reference numeral 9 denotes a frame fixed to the clutch housing 3, and has a shielding plate 10 inside thereof. An air cleaner 11 is disposed in front of the shielding plate 10, and the air cleaner 11, the engine 2, and the radiator 7 are covered with a bonnet 12. It is being said.

Tractor 1 is a four-wheel drive type, and 13
14 is a front wheel, 14 is a rear wheel, and 15 and 16 are a front wheel drive propulsion shaft and a front wheel differential device.

Hydraulic device 19 is located at the rear upper part of the transmission case 4.
is arranged, and a pair of left and right lower links 20 are pivotally supported at the bottom thereof, and the lift arm 21 of the hydraulic device 19 and the lower link 20 are connected by a lift rod 22, and the lower link 20 is connected to a top link (not shown). ) constitutes a three-point linkage mechanism 23,
A working machine 24 such as a rotary tiller, a seeding machine, a forklift, a snow blower, etc. can be mounted in a vertically movable manner.

The upper part of the hydraulic system 19 is covered with a floor seat part 26 of a cover body 25, and this cover body 25 descends downward from the front end of the floor seat part 26 to become a front seat part 27. It extends forward to form a pair of left and right step portions 28R and 28L, and also extends rearward and upward from the rear end of the floor sheet portion 26 to form a connecting portion 29 (connecting member), which is made of sheet metal (or reinforced synthetic material). It is integrally molded from resin).

Reference numerals 30L and 30R denote a pair of left and right fenders that cover the inside, above, and front of the left and right rear wheels 14, and each fender 30 has a substantially horizontal upper wall 30a that covers the upper part of the rear wheel 14, and a substantially horizontal upper wall 30a that covers the upper part of the rear wheel 14, and a A front wall 30b formed in a U-shape to cover the rear wheel 14 and a side wall 30c covering the seat 33 side of the rear wheel 14 are formed, and are integrally molded with the cover body 25, or are welded or bolted. In the embodiment, the fender is made of sheet metal.

A mounting portion 34 for removably attaching a forward seat 33F is formed on the central upper surface of the floor seat portion 26, and a handle post 36F having a forward movement handle 35F at its upper end is mounted on the transmission case 4 below the front of the mounting portion 34. A mounting part 37 is provided, and a steering mechanism 41 such as relay shafts 38, 39 and a relay box 40 is provided from the mounting part 37 to the front wheel 13, and the front wheel 13 can be steered by operating the handle 35F. .

44R, 44L are left and right brake pedals, 45 is a clutch pedal, the three pedals 44, 45 are supported by a pedal shaft 46, and the depressing operation of the left and right brake pedals 44R, 44L is controlled by rods 47R, 4.
Hydraulic cylinder 48 (one pair on the left and right) via 7L
The hydraulic brake devices 49 disposed on the left and right sides of the transmission case 4 are actuated by the pressure oil in the hydraulic cylinder 48. Also, clutch pedal 4
The depressing action of 5 is performed by levers 50, 51 and rod 52.
The clutch in the clutch housing 3 is connected and disconnected through the clutch housing 3.

Reference numeral 55 designates a box attached to the frame body 9 in front of the forward handle post 36F, the top surface of which is open and provided with an attachment portion 56 for the reverse seat 33R, and a cover pivotally supported on the frame body 9. 57 can be fitted freely, and there is a battery 5 inside.
8 is placed.

A mounting part 59 is provided on the right side of the hydraulic system 19 on the transmission case 4 to which a handle post 36R having the reverse handle 35R at the upper end is attached. 60 and 61 are provided so that the operation of the reverse steering wheel 36R can be transmitted to the relay box 40, so that the front wheels 13 can be steered.

The seat 33R, handle 35R, and handle post 36R for backward movement are exactly the same as those for forward movement, and only one set is prepared for each tractor 1, and they can be attached and detached at each attachment part 34, 37, 56, 59. It is flexible and can be used for both forward and backward postures by changing the mounting position.

The height of the reverse seat 33R attached to the mounting portion 56 is higher than the position of the forward seat 33F, and the operator's field of view is expanded in the reverse driving position.

A pair of left and right reverse brake pedals 62R, 62L are arranged on the left side of the hydraulic system 19, and are pivotally supported via a shaft 64 to a bracket 63 that fixes the hydraulic cylinder 48 to the vehicle body 5. It is connected to the rods 47R and 47L, respectively, and can operate the left and right hydraulic cylinders 48.

Further, a reverse clutch pedal 65 is arranged on the left side of the hydraulic device 19, and this clutch pedal 65 is pivoted on a shaft (not shown) coaxial with the shaft 64, and is able to jump over the hydraulic device 19. The lever 50 is connected to the lever 50 via a rod 66 pivotally supported on the shaft 64, a rod 67 connected to the rod 66, and an arm 68.
The pedal is configured so that the pedal force is transmitted to the pedal.

The space between the left fender 30L and the box 55 serves as an entrance for the operator to get on and off, but between the right fender 30R and the box 55, an operation panel section 70 and a switch box 71 are arranged.

The operation panel section 70 is provided with gear levers such as a main gear shift lever 72, an auxiliary gear shift lever 73, and a PTO gear lever 74, as well as manufacturer-related gears such as a tractor meter 75, a fuel gauge 76, and an easy checker. Operation force can be transmitted between 72, 73, 74 and the shifter in the transmission case 4 using a Bowden wire or the like.

Although not shown in the switch box 71,
A lighting switch, turn signal switch, main switch, etc. are provided.

In this way, by shifting the operation panel section 70 and the switch box 71 to one side from the center of the tractor 1 in the left-right direction, the operator can easily operate the tractor in either the forward or reverse posture.

Note that a fuel tank is disposed below the operation panel section 70, and a control lever 77 for the hydraulic device 19 is provided on the inside thereof.

In FIG. 3, 101 is a cabin device, which has a pair of left and right doors, a cabin body 103 whose other left and right sides and front and rear surfaces are closed with glass, and a canopy 1 provided on the top of this cabin body 103.
02.

The upper part of the cabin body 103 has a rectangular upper frame 103A connected to the upper ends of the front, rear, left and right columns, and the canopy 102 has a rear part pivoted around a horizontal axis 112 at the rear part of the upper frame 103A, and a front part of the canopy 102. is located above the rear-facing operator's head ER, and the upper frame 1
It is connected to the front part of 03A by bendable links 104 and 105 constituting the holding means 113, and is movable up and down.

The two links 104 and 105 are rotatably connected to each other by a pin 106 and are connected to the canopy 10, respectively.
2 and the upper frame 103A via pins 107 and 108.

Further, each end of a spring 109 is connected to the middle part of each of the two links 104 and 105, and one link is connected to one of the links at a position where the other link is slightly bent from a straight line to one side. A stopper 110 is provided to prevent rotation.

Spring 109 has two links 104, 10
5 is pulled in the bending direction, and switches unstably from the straight state to the left and right, and when the link contacts the stopper 110, it maintains that state.

In Figures 3 and 4, the link 105 is the stopper 1.
10, the canopy 102 is tilted forward and upward, and the front part is in the raised position, and the rear seat 3
Overhead of operator ER seated in 3R and canopy 10
2, and when performing forward work, move the pin 106 in the Z direction in FIG.
Bend the links 104 and 105 of the book, and the canopy 102
is brought into contact with the upper edge of the upper frame 103A to make its height 2 m or less. In addition, the canopy 102 and the upper frame 103
A is preferably provided with a stopper such as a hook to maintain the canopy 102 in its lowest position when it is placed at the lowest position.

Reference numeral 111 is an accordion-shaped telescopic cover provided between the canopy 102 and the upper edge of the upper frame 103A. A large opening is created in between, allowing rain, dust, wind, noise, etc. to enter the cabin device 101. Therefore, a device is provided to close the opening and seal the inside of the cabin device 101. It is being Since this cover 111 is vertically expandable and retractable, even if the canopy 102 is moved up and down, it does not become an obstacle to the movement.

The holding means 113 not only has the function of holding the canopy 102 in the raised position, but also has the function of holding the canopy 102 in the raised position.
serves as a push-up member and a pull-down member for moving the canopy 102 up and down, and the links 104,
If the pins 107 and 108 of 105 are made to shift in the front and back direction when the canopy 102 is at the lowest position, the links 104 and 105 are held at the lowest position by pulling the links 104 and 105 with the spring 109. It also becomes a means. Note that this holding means 113 is not limited to the configuration of the embodiment, and can adopt various configurations.

(Effects of the invention) According to the invention, the first attachment part of the steering wheel for forward driving is provided on the vehicle body on the rear side of the bonnet, the first attachment part of the seat for forward driving is provided between the rear wheel fenders, and A second mounting part for the rearward driving seat is provided on the upper surface side of the rear side of the bonnet, a second mounting part for the rearward driving handle is provided between the rear wheel fenders, and the steering handle and the seat are attached to each mounting part. Since it is designed to be detachable, it is possible to change the position of the steering wheel and seat between a forward-facing driving position and a backward-facing driving position. It can be easily changed and the driving posture can be stabilized.

Furthermore, there is a gear shift lever on the outside of one side of the seat and the steering wheel, which are spaced apart in the front and rear, making it possible to shift gears effortlessly from the seat whether driving forward or backward. Since the operator does not have to hold the gear shift lever between his legs while driving, maneuverability is improved.

In addition, the second attachment part of the seat for rear-facing drivers is provided on the top side of the rear side of the tractor, and the seat position can be raised when driving backwards. Even if there is such a problem, the driving field of view is sufficiently secured and the work status can be checked easily and reliably.

Furthermore, the canopy is pivoted at the rear and pivotable at the front, and is held in the raised position by a holding means, so that the seat position when driving backwards is the same as when driving forwards. Even if the height is higher than that, a space is created between the head of the operator sitting in the seat and the canopy, making it possible to use one cabin device for both public road driving and backward work while ensuring safety. becomes. In addition, a telescopic cover is provided between the canopy and the cabin body to close the opening formed between the raised canopy and the cabin body, so rainwater, dust, etc. The canopy can be prevented from entering the canopy, and since the cover is stretchable, the canopy can be moved up and down.

In addition, the canopy of the cabin system that surrounds both the forward-facing seats and the rear-facing seats has a structure in which the rear part is pivoted to the cabin body and the front part can be moved up and down, so it can be easily lifted by hand. The canopy can be easily moved up and down without the need for a complicated lifting mechanism and can be held in the raised position.When the front part of the canopy is raised, it does not hit the head of the operator in the rear-facing seat, and the canopy is tilted backwards, so when driving backwards. An increase in wind resistance is also avoided.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a partially omitted side view of the entire tractor, Figure 2 is a plan view of the rear half of the tractor, and Figure 3 is a tractor with a cabin. An external view of the main parts, and FIG. 4 is a sectional view showing the function of the cabin canopy. 1...Tractor, 2...Engine, 12...Bonnet, 30...Fender, 33F, 33R...
... Seat, 35F, 35R ... Steering handle, 3
4, 37, 56, 59... each mounting part, 72, 7
3,74...Speed lever, 101...Cabin,
102...Canopy, 103...Cabin body, 11
3... Holding means.

Claims (1)

[Scope of Claim for Utility Model Registration] The vehicle is equipped with a bonnet that covers the engine and a pair of left and right rear wheel fenders, and a steering handle for forward driving is provided upright on the vehicle body on the rear side of the bonnet. In a tractor having a forward-facing driver's seat between the rear wheel fenders at the rear, a gear shift lever for operating the transmission, and a cabin surrounding the steering handle, the seat and the gear shift lever, on the rear side of the bonnet, A first attachment part of the steering wheel for forward-facing driving and a second attachment part of the seat for rear-facing driving are provided, and the first attachment part of the seat for forward-facing driving and the steering handle for rearward-facing driving are installed between the rear wheel fenders. A second mounting part is provided, and the steering wheel and the seat are detachably attached to the corresponding mounting parts, so that the posture can be changed between a forward driving position and a rearward driving position, and The seats in the rear-facing driving position are located at a higher position than the seats in the rear-facing driving position, and the gear shift lever is located on one side of the steering wheel and the seat, which are spaced apart from each other. Further, the cabin is provided with a canopy on the upper part of the cabin body, the rear part of the canopy is pivoted to the cabin body, and the front part of the canopy is mounted in a seat in a rearward driving position. The canopy is rotatable upward to form a desired space above the driver's head, and includes a holding means for holding the canopy in the raised position, and a holding means for closing the opening between the canopy and the cabin body while allowing the canopy to move up and down. 1. A tractor operating control device, comprising: a telescopic cover; the canopy is held in a backward downward tilting position when the front part is raised;