JPH02303979A - Power agricultural machine - Google Patents

Abstract

PURPOSE:To facilitate maintenance and inspection connected to a transmission and steering in the front part of a machine body by providing constitution in such a way as possible to remove a front part of a transmission case, which is divided into front and rear parts along a divided surface crossed with an advancing direction, integrally with a bonnet and a step from a frame of the machine body. CONSTITUTION:In the case of a power agricultural machine 2 of passenger rice planter or the like, a main transmission case 5 is arranged in the front part of a machine body, and a rotational output of an engine 20 is transmitted to an input shaft of the transmission case from a transmitting shaft 23 through a belt-type transmitting means. Here the transmission case 5 is constituted by bolt-connecting case shell units 5a, 5b divided into front and rear parts by a divided surface X-X orthogonal with an advancing direction, and a steering case 90 is integrally built in a front face part of the front part case shell unit 5a. While a step 108 lower by one step than a driving floor 104 is integrally formed with a bonnet 107 in a side of the bonnet 107 for covering an upper part of the transmission case 5, and this bonnet 107 is integrally formed with the front part case shell unit 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a power agricultural machine that is used by attaching a working machine part for rice planting or the like.

[Prior Art] There is a power agricultural machine that has steps lower than the floor on the left and right front sides of the machine body. In this type of power agricultural machine, a part of the agricultural machine for rice planting or the like is attached to the rear of the machine body, so a balance weight is attached to the front end of the step in order to maintain the front-rear weight balance.

[Problem to be solved by the invention] In the above-mentioned power agricultural machine, when inspecting the devices and equipment housed in the front part of the machine body such as the transmission case, it is necessary to open the bonnet that covers them. There was a problem that the steps and balance weights got in the way and made inspection work difficult.

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following features.
.

In other words, the power agricultural machine according to the final IJ1 has a mission case disposed at the front of the machine, and the shell of the mission case moves forward and backward along a dividing plane that intersects the direction of travel. In addition to being indivisible and formed into a cane,
A step lower than the control floor is formed integrally with the bonnet on the side of the hood covering the L portion of the mission case, and the bonnet and the step can be removed from the frame integrally with the front shell of the mission case. It is characterized by being composed of
] The front part of the mission case, the bonnet, and the step are constructed so that they can be removed from the frame of the aircraft as one unit, so inspection of the equipment and equipment housed in the front of the aircraft, including the mission case, is possible. can be easily carried out.

[Embodiment] Figures 1 to 6 show an embodiment of the present invention, in which a rice-planting agricultural machine part 3 is attached to the rear of a power agricultural machine 2 and used as a riding rice transplanter. are doing.

The power agricultural machine 2 has a main transmission case 5 arranged at the front of the machine body, and a connecting frame 6 which is horizontally U-shaped when viewed from the side at the rear of the main transmission case 5.
is provided, and a differential case 9 is housed within the connection frame. Left and right front axle cases io and to project outward from both side surfaces of the differential case 9, front wheel support cases 11 and 11 are superimposed on the ends of the cases so as to be able to change direction, and left and right front axle cases 11 and 11 are mounted on the lower ends of the front wheel support cases. The front wheels 12,12 of each are pivotally supported. Also.

A front end portion of a main frame 7 extending rearward is fixedly connected to the rear portion of the connecting frame 6, and a side clutch case 13 and a rear axle case 14 integrated therewith are attached to the rear end portion of the main frame. It is provided. A chain case 15 is provided at both left and right ends of the rear axle case 14.
15 is attached facing rearward, and left and right rear wheels 16 and 16 are each pivotally supported at the rear end.

The engine 20 is installed on brackets 21 and 2L fixed to the main frame 7 and the side clutch case 13. The rotational output of the engine is transmitted forward by a transmission shaft 23, and transmitted by a belt to an input shaft 25 of the transmission case via a counter shaft 24 at the front end of the transmission shaft.

Two wooden bells 1-28 and 29 are stretched between the pulley 26 on the counter shaft and the pulley 27 on the input shaft, and a tension pulley 30 tensions either belt to transmit power. It has become. When the belt 28 is tensioned, low-speed transmission occurs, and when the belt 29 is tensioned, high-speed transmission occurs. When both belts are relaxed, no transmission occurs, and the clutch is in the "disengaged" state. becomes. Further, a hydraulic pump 31 is provided at the rear end of the counter shaft 24.

As shown in FIG. 3, the mission case 5 is formed by joining case shells 5a and 5b, which are divided into front and back parts along a plane xx perpendicular to the direction of travel, with bolts or the like. Note that the steering case 90 is integrally assembled to the front surface of the front case shell 5a. A steering wheel 92 is attached to the upper end of a steering shaft 91 that extends upward from a steering case 90.

Inside the transmission case 5, the input shaft 25, the traveling system output shaft 34, the clutch shaft 35, and the working system output shaft 36 are supported in parallel in the front-rear direction. As constituent members of the main transmission 2?32 and the inter-stock transmission 33, gears Gl, G2. G3, G4. A gear G5 is formed, and a gear G6 is attached to a gear cylinder 42 that is slidably fitted to the traveling system output shaft 34.
．． G7 is formed, and a gear G8. G9 was formed.

Further, gears GIO and G11 are formed in a gear cylinder 45 rotatably attached to the clutch shaft 35 by bearings 44, 44. The gear cylinders 43, 45 have claw portions 43a, 45a that engage with each other to transmit rotational power. In addition, G3
and 010 are always in mesh with each other. The gears of the main transmission 32 are changed by sliding the gear cylinder 42 with the main transmission lever 46. That is, when G4 and 06 are engaged, the gear is forward 1, when G5 and G7 are engaged, the gear is 2 forward, and G6 is engaged.
When the and Gll are engaged, it becomes reverse speed. In addition, the gear cylinder 43 is slid by the inter-stock shift lever 47 to perform inter-stock gear shift, and when the claws 43a and 45a are engaged, the first gear is engaged, when G2 and 08 are engaged, the second gear is engaged, and when the G2 and 09 are engaged, the gear is shifted between the stocks. and 3
When G1 and 08 are engaged, it becomes 4 stages.

Furthermore, sleeves 48 and 49 are rotatably fitted to the outer peripheries of the clutch shaft 35 and the working output shaft 36, and gears G12 and G13 formed on both sleeves are in 1-coupling. Power is transmitted from the clutch shaft 35 to the sleeve sleeve 48 via a safety clutch 50. The clutch plate 52 and both claws 48a of the cylinder shaft 48, which are normally biased toward the cylinder sleeve side by the spring 51,
52a are engaged with each other, but when a certain amount of force is applied to the working part, the clutch plate comes off against the force of the spring 51 and the transmission is stopped. In addition, power is transmitted from the cylinder shaft 49 to the work system output shaft 36 via the planting clutch 55, and the pawl 57a of the clutch plate 57, which is biased toward the cylinder shaft 49 side by a spring 56 during zero operation, and the cylinder shaft. claw 49a
When the clutch pin 58 is pushed into the clutch plate side, its tip engages with the tipper surface formed on the outer circumferential surface of the clutch plate, and the clutch plate 5
At the angle where 7 is at the predetermined position, the transmission between the two is released.

The work system output shaft 36 extends to the rear end of the machine body, and a PTO shaft 139 (described later) is connected to its tip via a universal joint.

A rear end portion of the traveling system output shaft 34 is inserted into the differential case 9 and is transmission connected to a differential device 60 within the case. The entire differential device 60 is rotatably supported around a horizontal axis by bearings 61, 61, and a portion 62a of the outer surface meshes with the gear 34a of the output shaft of the traveling system and the gear 63a of the rear wheel transmission shaft 63. Inside the valley-shaped container 62, which is shaped as a gear to
Secondary bevel gears 68 and 68 are respectively attached to the left and right front axles 67 degrees 67 perpendicular to the left and right front axles and mesh with the respective secondary bevel gears. The front axle 67 is transmission-coupled to the front wheel shaft 71 via a gear train and a vertical shaft 70 provided inside the final case lOa of the front axle case and the front wheel support case 11 rotatably attached to the lower part thereof. There is. If there is a difference in the load applied to the left and right front axles when turning, etc., the ratio of the drive rotational force transmitted to both axles will change accordingly depending on the amount of load, and smooth running will be achieved.
is a differential stopper device that stops the above-mentioned differential action and transmits an equal rotational force to the left and right front wheels. Also.

The rear wheel transmission shaft 63 extends rearward inside the main frame 7, and its rear end is inserted into the side clutch case 13.

The side clutch has the configuration shown in FIG. 4.

That is, a bevel gear 75 attached to the rear end of the rear wheel transmission shaft 63, and a rotating shaft 7 supported horizontally on the case 13.
A cylindrical hevel gear 78 rotatably attached to 6 by a bearing 77 meshes with each other. - Inner teeth 178a and 78b are formed at both ends of the inner surface of the cylindrical bevel gear 78, and outer teeth 80a mesh with these inner teeth separately;
Sliding tubes 80 and 81 having 81 a are fitted onto the rotating shaft 76 . The sliding tubes 80, 81 are biased inwardly by springs 82, 82, but can be slid outwardly by shifters 83, 84, and the sliding tubes 80, 81 can be moved inwardly and outwardly in accordance with their mating positions. The transmission state is switched between a transmission state in which the gears are engaged and a non-transmission state in which they are disengaged. Also, the outside t of the sliding tube
k180a, 81a are always meshed with gears 87.87 attached to the rear axle 86 inside the rear axle case 14, and in the above-mentioned transmission state, rotational driving force is transmitted to the rear axle 8.
Tell 6. The rear axle 86 is connected to the left and right transmission case 15.
It is connected to the rear wheel axle via a chain 788.88 in 15.

Body 10 to be placed on the chassis configured as above
0 is a rear part 102 that covers the engine 20 etc. and a cockpit 101 is installed in the second part, a front part 103 that covers the back of the -L part of the mission case 5, and a horizontal part formed between the above two parts. It consists of a floor part 105 and a steering cover part 105 that stands up from the front part 103 and accommodates the steering shaft 91. Front part 103
The front part of the bonnet is 107, and this bonnet l
Steps 108, 108, which are one step lower than the floor 105, are formed on both sides of O7, and a balance weight 109, which also serves as a bumper, is provided between the tips of the left and right steps across the rack. The bonnet 107 and the steps 108, 108 are integral with each other and can be separated from the body lOO along the separation plane Y-Y. Also,
Since the bonnet 107 and the steps 108, 108 are connected and integrated with the front case shell 5a of the transmission case and the steering case 90, appropriate pulleys,
If you remove the shaft, pipe, etc., these cases 5a,
90 can also be separated from the frame and body of the aircraft at the same time. in this way.

Since the inside of the mission case 5 can be easily and completely exposed, inspection of the mission case is extremely easy.

Further, numeral 120 in the figure is an elevating device for elevating and lowering the agricultural working machine part provided at the rear of the power agricultural machine, and this elevating device! Reference numeral 120 denotes an L link 123 which is extended by fixing a plate spring 123b to a link base 123a supported by a frame 122 having a gate shape when viewed from the rear, and an L link 123 provided extending rearward from the frame 122. A lower link 125 is supported by an open pivot frame 124, and a connecting frame 127 is attached to the rear ends of these upper and lower links. A rolling shaft 128 that rotatably supports the agricultural machine portion 3 is provided at the lower end of the connecting frame 127 and projects rearward. Further, a driving hydraulic cylinder 130 whose base side is pivotally attached to the left and right center portions of the back surface of the rear axle case 14 and whose piston rod 130a is connected to a link base 123a of the L link is inserted vertically inside the pivot support frame 124. The hydraulic cylinder is extended and contracted to -
By rotating the L link 123 downward by L, the connecting frame 127 can be moved downward by t while maintaining a substantially constant posture.

The agricultural machine part 3 is for rice planting, and the PTo shaft 1
A transmission case 140 that transmits power through a transmission case 140, a seedling stand 141 that is inclined in the -L direction of the transmission case so that the front side is at the -L position, and a seedling stand 141 that holds the seedlings at the tip. The lower side of the transmission case 140 is provided with an attached claw 142a and a planting rod 142 that moves up and down while drawing a predetermined trajectory to take out the seedlings on the seedling stand 141 one by one and plant them in the field. There is a center float 145 and a pair of left and right floats 14 that support the agricultural machine part on the paddy field surface.
6.146 is pivotally mounted below L. A rod 147 for detecting vertical movement is attached to the front part of the center float, and when the float moves upward, the hydraulic cylinder 130 is extended to hold the agricultural machine part 3. Conversely, when the float moves downward, the hydraulic cylinder 130 is extended, and when the float moves downward, the hydraulic pressure is increased. The cylinder 127 is contracted to lower the agricultural implement portion 3.

[Effects of the Invention] As explained above, in the power agricultural machine according to the present invention, the front part of the mission case, which is divided into front and rear parts along the dividing plane that intersects the direction of travel, is integrated with the bonnet and steps into the machine body. By making it removable from the frame, it is now possible to easily maintain and inspect the transmission and steering components located at the front of the aircraft. .

[Brief explanation of the drawing]

Fig. 1 is a side view showing a power agricultural machine in use as an embodiment of the present invention, Fig. 2 is a front view of the main parts, Figs. 3 and 4 are developed sectional views of the transmission mechanism, and Fig. 5. 6 is a side view of different main parts, and FIG. 6 is a view taken along the line A--A in FIG. 5. 1... Riding rice transplanter, 2... Power agricultural machine, 3... Agricultural machine part, 5... Mission case, 5a, 5b...
・82 cases, 20...engine, 90...steering case, 105...floor part, 107...
Bonnet, 108 steps.

Claims (1)

[Claims] (1) In a power agricultural machine in which a mission case is disposed at the front of the machine body, the shell of the mission case is formed so as to be divisible back and forth along a dividing plane intersecting the direction of travel, and the mission case A step lower than the control floor is integrally formed on the side of the bonnet that covers the upper part of the bonnet, and the bonnet and the step are configured to be removed from the frame integrally with the front shell of the mission case. Powered agricultural machinery characterized by: