JPH0510563Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an elevating device for an agricultural machine in which an agricultural machine such as a planting section is mounted on the rear of a traveling machine body so that it can be raised and lowered via an elevating cylinder and a link mechanism.

"Prior Art" Conventionally, as shown in Japanese Utility Model Publication No. 47-10021, there has been a technique in which a lifting cylinder is provided on a traveling machine body and the agricultural machine is raised and lowered by the cylinder.

"Problems to be Solved by the Invention" In the prior art, the lifting cylinder was attached to the bracket, which had an oil passage for hydraulically connecting the lifting cylinder and the hydraulic valve, through a support shaft with an oil passage. It is troublesome to assemble and disassemble the support shaft, and it is not easy to attach and detach the lifting cylinder.In addition, since the support shaft is inserted through the rear end of the lifting cylinder to support the lifting cylinder, it is difficult to assemble and disassemble the lifting cylinder. There were problems such as the inability to easily prevent shaking.

``Means for Solving the Problems'' However, the present invention has a structure in which an agricultural machine is installed at the rear of a traveling machine body so that it can be raised and lowered via an elevating cylinder and a link mechanism. Grooves are respectively formed, and support shafts that are respectively engaged in the respective engagement grooves are provided on both sides of the intermediate portion of the lifting cylinder, and the lifting cylinder is installed between the left and right frames via the respective engagement grooves and the support shafts. This is a characteristic feature.

``Function'' Therefore, since the lifting cylinders are directly attached to the left and right frames of the traveling aircraft via the engagement grooves, there is no need for special members to support the lifting cylinders, which simplifies the mounting structure of the lifting cylinders and improves the workability of attaching and removing them. In addition, both sides of the lifting cylinder can be protected by the left and right frames, and since the support shafts on both sides of the middle part of the lifting cylinder are connected to the left and right frames, the left and right support width of the lifting cylinder can be made larger than before. It is possible to easily prevent the lifting cylinder from swinging in the left and right directions, and to easily improve the lifting cylinder support function.

[Embodiments] The embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of the lift cylinder portion.
In the figure, reference numeral 1 denotes a vehicle on which an operator rides, the rear end of a body frame 3, which is a vehicle body mounting an engine 2, is connected to a transmission case 4, front wheels 6 for traveling in paddy fields are supported on both front sides of the transmission case 4 via a front axle case 5, and rear wheels 8 for traveling in paddy fields are supported on both rear sides of the transmission case 4 via a transmission case 7. Spare seedling carriers 10 are attached to the outside of both sides of a bonnet 9 which covers the engine 2, and the transmission case 7 and the like are covered by a body cover 12 which forms a step 11. A driver's seat 13 is attached to the top of the body cover 12, and a steering handle 14 is provided in front of the driver's seat 13 and at the rear of the bonnet 9.

Furthermore, 15 in the figure is a planting part which is an agricultural machine equipped with a seedling stand 16 for multi-row planting, a plurality of planting claws 17, etc. is supported by the planting case 20 via the guide rails 18 and 19 so as to be slidable back and forth from side to side, and a rotary case 21 that rotates at a constant speed in one direction is supported by the planting case 20. A pair of planting claw cases 22, 22 are arranged at symmetrical positions around the rotation axis, and the claw cases 22
Attach the planting claw 17 to the tip and attach the rotary case 2.
The structure is such that two planting claws 17, 17 are alternately moved in one rotation of No. 1 to plant two seedlings.

In addition, a rotation fulcrum shaft 2 is provided on the front side of the planting case 20.
A support frame 24 is provided via the link mechanism 3, and the support frame 24 is connected to the rear side of the vehicle 1 via a three-point link mechanism 27 including a top link 25 and lower links 26, 26. It is equipped with a hydraulic lifting cylinder 28 that lifts and lowers the attaching part 15, and drives the front and rear wheels 6, 8 to move at a substantially constant speed, and at the same time, plants one seedling from a seedling stand 16 that moves back and forth from side to side. The structure is such that the seedlings are taken out by the claws 17 and the seedling planting work is performed continuously.

In addition, in the figure, 29 is a traveling speed change lever, 30 is a planting lift lever, 31 is a planting sensitivity adjustment lever, 32
is a traveling clutch pedal, 33, 33 is a left and right brake pedal, 34... is a float for leveling the field,
The floats 34 are supported below the planting case 20 via a planting depth adjustment link 35 or the like.

As shown in FIGS. 4 and 5, the tip of the piston rod 36 of the lifting cylinder 28 is connected to the left and right lift arms 39 via a pivot plate 37 and a lift shaft 38.
39 and left and right lift rods 40, 40, each base end of the lower links 26, 26 and the lift arms 39, 39 is connected to the portal frame 41 between the upper rear ends of the vehicle body frame 3 via shafts 42, 42. a lower hit pin 43 and the lift shaft 3, which support the support frame 24 and the lower links 26, 26 in a swingable manner and connect the support frame 24 and the lower links 26, 26, respectively;
Stretch the left and right lift rods 40, 40 between the
When the piston rod 36 moves in and out, these lift arms 39, 39 and lift rods 40, 40
The planting section 15 is also configured to be moved upward via a link mechanism 27.

Further, the main body of the elevating cylinder 28 is attached between the left and right inner frames 44, 44, which are low in the front and high in the rear, the front end of which is fixed to the vehicle body frame 3, and the rear end of which is fixed to the upper end of the portal frame 41.
A spring seat 45 is fixed to the opposite end of the cylinder 28, and a spring receiver 47 facing the spring seat 45 is loosely fitted to the outside of the cylinder 28 body via a compression spring 46. The guide wheel body 48 to be fitted is fixed to the spring receiver 47, and the left and right support shafts 49, 49 projecting outward from the left and right around the axis of the guide wheel body 48 are attached to the upper side surfaces of the inner frames 44, 44. The cylinder 28 is inserted and supported in the engagement grooves 50a, 50a of the U-shaped engagement fittings 50, 50, which are engagement recesses provided in the inner frames 44, 44, through the shaft metals 49a, 49a.
It is configured to be rotatable about shafts 49, 49 and resiliently supported via a spring 46.

and a metal fitting 51 for preventing the support shafts 49, 49 from being pulled out, which closes the upper portions of the engagement grooves 50a, 50a;
51 is removably attached to the upper side of the inner frames 44, 44 via bolts 52 to prevent the elevating cylinder 28 from coming out above the engagement grooves 50a, 50a. Inside the U-shaped vertical movement regulating fitting 53 fixed on the side,
A regulating pin 54 fixed to the spring seat 45 faces the spring seat 45, and when the spring seat 45 side of the cylinder 28 moves up and down, the metal fittings 53 and the pin 54 regulate the movement. As is clear from the above,
In a structure in which the rear part of the vehicle body frame 3, which is a traveling body, is equipped with a planting section 15, which is an agricultural working machine, and which can be raised and lowered via an elevating cylinder 28 and a link mechanism 27, an inner frame 44, which is a left and right frame constituting the vehicle body frame 3, is installed. , an engagement groove 50a on the top surface of 44,
Support shafts 49, 49 are provided on both sides of the intermediate portion of the elevating cylinder 28, and are respectively formed with support shafts 49, 49, which are respectively formed in the engagement grooves 50a, 50a, and are engaged with the respective engagement grooves 50a,
The lifting cylinder 28 is attached between the left and right inner frames 44, 44 via the shaft 50a and the support shafts 49, 49.

By the way, as shown in FIGS. 2 to 3 and 6, auxiliary weights 56 can be attached to the left and right bent portions 55a of the front bumper 55 of the vehicle 1. Notch groove 5
7 is engaged with the engagement groove 58 of the auxiliary weight 56, and the upper surface of the weight 56 and the step 1
By making the front end side heights of 1 approximately the same, even when the auxiliary weight 56 is attached, workability during turning is improved without increasing the overall length of the aircraft, and it is possible to improve workability when turning from the front to the aircraft. When a worker gets on and off, the auxiliary weight 56 is used as a scaffold without being an obstacle, so that the worker can get on and off easily. Nao you bumper 5
5, it is also possible to attach a front weight to the center of the entire surface as in the conventional case.

This embodiment is configured as described above, and when the piston rod 36 of the lifting cylinder 28 is extended, the planting part 15 is lowered, and when the piston rod 36 is retracted, the planting part 15 is raised. In addition to the three-point link mechanism 27, the planting section 15 has left and right lift arms 39 with a triangular three-dimensional frame structure.
39 and left and right lift rods 40, 40, the three-point linkage mechanism 27 is supported with good rigidity on the machine side, preventing twisting in the left and right direction, and the arms 39, 39 and rods 40, 40 serve as reinforcing members to reduce the size of the three-point linkage mechanism 27. Weight reduction can be achieved.

In addition, when the planting part 15 is lifted up by the load of the planting part 15 on the lifting cylinder 28, a tensile force is applied to the piston rod 36, so when the piston rod is extended, the planting part 15 is raised as in the conventional case. Compared to a structure in which compressive force is applied to the so-called piston rod, it is possible to raise the planted portion 15 with a small tensile force due to the link ratio of the arm 39 and the rod 40 without considering the strength against buckling etc. As a result, the elevating cylinder 28 can be made smaller and lighter.

Furthermore, when the lifting cylinder 28 is extended and a load is applied to the lifting cylinder 28, the reaction force of the cylinder 28 is applied to the large diameter engagement groove 5 of the metal fitting 50.
Since it acts on the shaft metal 49a through the shaft metal 49a, its surface pressure is extremely small, and the shaft 49
The rotation of the lifting cylinder 28 about the center can be made smooth.

Furthermore, since the elevating cylinder 28 is installed above the vehicle body frame 3 and near the substantially lower position of the driver's seat 13, even if muddy water or mud splashes up from the field, it will not reach the cylinder 28 or the shaft 49. Therefore, the performance of the cylinder 28 and the smooth rotation of the cylinder 28 can be stably maintained over a long period of time.

Further, since the lifting cylinder 28 is installed at a position above the vehicle body frame 3, and the lifting cylinder 28 can be attached or removed from the upper side of the machine by attaching and detaching the metal fittings 51, 51 using the bolts 52. , it is possible to make these operations easier and improve workability in maintenance and the like.

"Effects of the Invention" As is clear from the above embodiments, the present invention has a structure in which the agricultural machine 15 is installed at the rear of the traveling machine 3 so as to be able to rise and fall freely via the lifting cylinder 28 and the link mechanism 27. Engagement grooves 50a, 50a are formed on the upper surfaces of the left and right frames 44, 44, respectively, and support shafts 49, 49, which are engaged with the engagement grooves 50a, 50a, respectively, are provided on both sides of the intermediate portion of the lifting cylinder 28, The lifting cylinder 28 is installed between the left and right frames 44, 44 via the engaging grooves 50a, 50a and the support shafts 49, 49, and the engaging grooves 50a,
Since the lifting cylinder 28 is directly attached via the cylinder 50a, there is no need for a special member to support the lifting cylinder 28, and the mounting structure of the lifting cylinder 28 can be simplified and the workability of attaching and removing it can be easily improved. Both sides of the lifting cylinder 28 can be protected by the left and right frames 44, 44, and since the support shafts 49, 49 on both sides of the middle part of the lifting cylinder 28 are connected to the left and right frames 44, 44, the left and right support width of the lifting cylinder 28 can be made wider than before. It can also be made larger, easily prevent the lifting cylinder 28 from swinging in the left and right directions, and easily improve the supporting function of the lifting cylinder 28.

[Brief explanation of the drawing]

Figure 1 is a side view of the lifting cylinder member, Figure 2 is an explanatory side view of the lifting cylinder member,
The figure is an overall side view of the riding rice transplanter, Figure 3 is a plan view of the same, Figure 4 is an explanatory side view of the planting section, Figure 5 is a side plan view of the lifting cylinder section, and Figure 6 is a side view of the auxiliary weight section. It is a removal explanatory diagram. 3... Vehicle body frame, 15... Planting section, 27...
... Link mechanism, 28 ... Lifting cylinder, 49 ...
Support shaft, 50a...engaging groove.

Claims (1)

[Scope of utility model registration request] In a structure in which the agricultural machine 15 is installed at the rear of the traveling body 3 so as to be able to rise and fall freely via the lifting cylinder 28 and the link mechanism 27, engagement grooves 50a, 50a are provided on the upper surfaces of the left and right frames 44, 44 constituting the traveling body 3.
The lifting cylinder 28 is connected to the supporting shafts 49, 49, which are formed in the respective engaging grooves 50a, 50a, respectively.
The respective engaging grooves 50a, 50a are provided on both sides of the intermediate portion.
and the left and right frames 44 via the support shafts 49, 49,
44. A lifting device for an agricultural working machine, characterized in that a lifting cylinder 28 is attached between the lifting cylinders 44 and 44.