JPH042142Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Purpose of the invention) ○ Industrial application field The present invention relates to a walk-behind mobile agricultural machine in which the vertical position of the wheels can be changed.

○ Conventional technology As this type of walking-type mobile agricultural machine, the
A reaping harvester is known from Japanese Patent No. 4856, but it is not equipped with a means for indicating the height of the wheels.

○ Problems to be solved by the invention The disadvantage of the above-mentioned known technology is that the height of the wheels cannot be seen from the position of the worker holding the handlebar because it is obstructed by the bonnet (body cover), string case, etc. It was hot.

(Structure of the invention) ○ Means for solving the problem In order to solve the above problem, the present invention attaches one end of the spring body 31 to the appropriate position of the aircraft to reduce the vertical adjustment load of the traveling wheels, and attaches the spring body 31 to the wheel drive case. A link 35 is interposed between the middle part of the pointer 6 and the other end of the spring body 31, and the pointer 2 extends upward from the link 35.
1 is passed through a display window 22 formed in a bonnet 28 above the connecting frame 1 and protrudes upward from the bonnet 28 to clearly indicate the up and down positions of the wheels to the operator who is in the operating position of the handlebar.

(Function) The link 35 interposed between the wheel drive case 6 and the spring body 31 that applies an elastic force that presses the wheel drive case 6 downward rotates as the vertical position of the running wheel 7 changes. A pointer extending from the link 35 moves back and forth within the display window 22 of the bonnet 28 as the link 35 rotates, and displays the vertical position of the running wheels 7.

(Example) Figures 3 and 4 show a case in which the present invention is applied to a reaping machine as a walking-type mobile agricultural machine. A pair of left and right running wheels 7 at the front end of a wheel drive case 6 is connected to a drive unit 3 at the rear of the fuselage including a drive unit 5 by a connecting frame 1, and whose rear end is pivoted 8 at an appropriate position of the drive unit at the rear of the fuselage. A pair of left and right running wheels 7,
7, and is positioned above the running wheels 7, 7 when viewed from the side. Inside the wheel drive case 6 is a transmission mechanism such as a chain and a sprocket for transmitting power between the output shaft of the drive section 3 and the axle. A wheel vertical position adjustment mechanism 10 is interposed between the central part of the connecting frame 1 and the front end of the wheel drive case 6, and a vertical adjustment load reduction means 30, which will be described later, is provided between the appropriate position of the machine body and the wheel drive case 6. establish.

9 is the rear end of the reaping work unit 2 or the connecting frame 1
This is a handle rod whose tip is fixed in place and extends upwards from the rear end of the fuselage.

The connecting frame 1 has a bottom plate 1b fixed to the lower end of a shaped frame main body 1a, and has a hollow box-like sealed state, and a wire support plate 1c is fixed to the rear part.

An auxiliary frame 25 and a mounting hitch 24 are integrally formed at the tip of the connecting frame 1, and the base of a reaping frame 26 of a reaping machine is detachably attached to the mounting hit 24. Power is transmitted to the reaping input shaft of the reaping work machine via the drive shaft 27 connected to the PTO shaft of the transmission case 5, and a bonnet 28 is disposed above the connection frame 1 and the drive shaft 27. The string case 29 can be stored freely.

Regarding the wheel vertical position adjustment mechanism 10, the first
This will be explained with reference to the figures.

A pivot shaft 8 is an output shaft fixed to the rear end of the fuselage frame 1 and projected from the lower end of the transmission case 5 which is integrated with the fuselage frame 1 and constitutes a part of the fuselage. The wheel drive case 6 is made vertically movable as the center, and a cylindrical body 11 is fixed to the middle part of the connecting frame 1 by penetrating it in the vertical direction, and a guide cylinder 12 is inserted through the cylindrical body 11 and movable vertically.
is provided, and the lower end of the connecting rod 14 which is pivoted 13 at the lower end of the guide cylinder 12 and the tip end of the wheel drive case 6 are pivoted 15.

A guide hole 16 is passed through the connecting frame 1 of the cylindrical body 11 at an appropriate position, and a plurality of lock holes 17 are formed in the guide tube 12 at intervals in the vertical direction at positions facing the guide holes 16 of the cylindrical body 11. establish.

A lock pin 18 that passes through the guide hole 16 and can be freely engaged with the lock hole 17 is provided in the connection frame 1, and a compression spring 19 and an operating wire 20 are provided to maintain the lock pin 18 in the engaged position when not operated. Insert the ends. Operation wire 20
The other end is connected to an operating lever that is mounted on a shaft at a suitable location on the handlebar 9 or mounted on the rear end of the transmission case 5 and is provided at a position where the operator can operate the vehicle with his or her hands or feet.

In the embodiment shown in FIG.
In addition, a tension spring 19a is provided and two springs are installed inside.The spring 19 is located between a support plate 41 fixed to the connection case 1 and a projection piece 42 fixed to the lock pin 18, The lock pin 18 is maintained in a state passing through the lock hole 17 at the desired position by pressing the tension spring 19a.
lock pin 18 when operating the operating wire 20.
It is configured to pull in the direction of B. The elastic force of the tension spring 19a is set to be weaker than the elastic force of the spring 19.

Next, the vertical adjustment load reduction mechanism 30 including the spring body 31 will be explained with reference to FIGS. 2 and 1.

One end of the spring body 31 is fixed to the upright frame 33 via the spring pressure adjustment mechanism 32, and the other end of the spring body 31 is locked to the upper part 35a of the link 35 whose intermediate part is pivoted 34 to the connecting frame 1. , a roller 36 mounted on the lower part 35b of the link 35 is brought into contact with the upper surface of a stopper 37 attached to the upper surface of the intermediate portion of the wheel drive case 6. The spring body 31 is a tension spring, and by applying an elastic force in the direction of the arrow a to the upper end of the link 35, the spring body 31 is applied to the stopper 37 and generates an elastic force in the direction of the arrow b, that is, elasticity in the direction of pushing down the running wheel 7. exert force.

In the above embodiment, the running wheels 7 are a pair of left and right wheels, but the present invention can also be implemented in a single-wheel running type mobile agricultural machine in which one running wheel is cantilever-supported by the wheel drive case 6. Of course.

The present invention uses the above-mentioned vertical adjustment load reduction mechanism 30 to display the vertical position of the wheel on the top surface of the bonnet 28.
The pointer 21 is projected upward from the bonnet 28.
A vehicle height display scale 23 is provided around the display window 22, which is formed at It is convenient and easy to do.

During operation of the walking type mobile agricultural machine (reaping machine), the running wheels 7 are equipped with a wheel vertical position adjustment mechanism 1.
The desired vertical position is maintained by selecting one of the plurality of lock holes 17 of the guide cylinder 12 and locking the lock pin 18 therethrough.

To change the vertical position of the running wheel 7, operate the operating wire 20 to disengage the lock pin 18 from the lock hole 17, and then use the vertical adjustment load reduction mechanism 30 to move the handle bar 9 up or down. After operating the machine to move it up and down, the operating wire is operated again to lock the lock hole 17 and the lock pin 18 at a desired position.

To change the vertical position of the running wheels 7, that is, change the rotation angle of the wheel drive case 6, the pointer 21 is moved back and forth within the display window 22 through the rotation of the link 35, and the wheel position is displayed (the (See Figure 5).

(Effects of the invention) In walk-behind mobile agricultural machines, it is impossible for the worker who holds the handlebar to directly see the position of the running wheels and wheel drive case because they are obstructed by the bonnet, string case, etc.; The vertical position of the traveling wheels can be easily determined by visually checking the position of the more protruding pointer. The scale display on the guide window allows even operators with little driving experience to easily adjust the vehicle height to suit field conditions.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a wheel vertical position changing device embodying the present invention. FIG. 2 is a plan view of the vertical adjustment load reducing means. FIG. 3 is a side view of a reaping machine implementing the present invention. FIG. 4 is also a plan view. FIG. 5 is a schematic diagram showing the wheel position display function according to the present invention. DESCRIPTION OF SYMBOLS 1... Connection frame, 2... Working part, 3... Drive part, 6... Wheel drive case, 7... Traveling wheel,
21... Pointer, 22... Display window, 28... Bonnet, 30... Vertical adjustment load reduction means, 31...
Spring body, 35...link.

Claims (1)

[Scope of utility model registration request] The working part 2 at the front of the machine body and the drive part 3 at the rear part of the machine body are connected by a connecting frame 1, and the drive part 3 side of a wheel drive case 6 in which the running wheels 7 are mounted is pivoted to the drive part 3 to form a wheel drive case. In a walk-behind mobile agricultural machine in which the running wheels 7 are movable up and down by the rotation of 6, the spring body 31 is used to reduce the load for vertical adjustment of the running wheels.
Attach one end to the appropriate location on the aircraft and attach the wheel drive case 6.
A link 35 is interposed between the middle part of the spring body 31 and the other end of the spring body 31, and the pointer 21 extending upward from the link 35 is connected to the bonnet 2 above the connecting frame 1.
8 through the display window 22 formed in the bonnet 2.
A walking type mobile agricultural machine characterized by protruding upward from 8.