JPH0135609Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention allows the vehicle to travel along a tobacco cultivation ridge or a tea cultivation ridge while straddling the ridge.
This invention relates to a work equipment attachment device for an elevated management work vehicle that performs various agricultural tasks such as sowing, planting seedlings, and harvesting.

Previously, Japanese Unexamined Patent Application Publication No. 1983-91102 and Utility Model Application No. 1983-
As shown in Japanese Patent Application No. 56510, there are tractors in which various agricultural machines are attached to the rear of the tractor via a mounting frame or the like.

However, with these conventional structures, the work equipment and transmission case are integrally attached to a mounting frame, etc., and it is difficult to install or remove the work equipment and transmission case independently, so it is difficult to install or remove the work equipment or transmission case independently. There was a problem of lack of compatibility when installing the system.

However, the present invention fixes and supports the hitch mast in a removable manner via a mounting plate on a horizontally suspended work equipment mounting frame via a three-point linkage mechanism, and
A working machine is removably attached to the mast via a hitch, and a PTO transmission case for transmitting PTO driving force from the PTO drive shaft to the working machine is detachably fixed and supported on the mast via a bracket. , various types of work equipment can be freely converted into a mounting frame via the hitch, and the left and right spacing and number of installations can be adjusted freely.On the other hand, when the work equipment requires driving force from the main machine side,
You can easily attach the PTO transmission case and use this driving force to perform various tasks, and it is also useful for towing machines that do not require driving force from the machine side.
The PTO transmission case can be easily removed and only the necessary parts installed to allow work to be carried out with a simple structure, and the transmission case itself can be easily installed or removed after various types of work equipment have been installed, making maintenance and inspection easier. In addition to making it convenient to use, it also makes it easy to replace the transmission case with one that has a transmission mechanism or has a different specification, expanding the scope of work with these machines. By holding the machine between the case and the hitch, stability can be further improved.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Figure 1 is an overall side view of the elevated management work vehicle.
FIG. 2 is a plan view of the same, in which 1 and 2 are front and rear body frames having a rectangular cross section, 3 is a torso body frame whose rear end is fixed to the rear body frame 2, and 4 is a top view of the same.
is a rotation fulcrum pin for swingably attaching and connecting the front end side of the torso body frame 3 to the front body frame 1;
5a and 5b are front axle cases that are slidably attached to and detachable from both ends of the front body frame 1 via positioning pins 6, 6, and 7 and 7 are axle cases 5a and 5.
8a and 8b are left and right front axle frames 7,
A front wheel for running mounted on the lower end of 7, 9a, 9
10a and 10b are positioning pins 11 and 1 at both ends of the rear body frame 2;
1, the left and right rear axle cases are removably attached via sliding axle cases 1, 12a and 12b are the rear axle cases 1
Rear axle frame 13 below 0a, 10b,
Rear wheel for running mounted on the shaft via 13, 14a, 1
4b is a hydraulic motor for driving the rear wheels which is integrated into the rear axle cases 10a and 10b; 15 is an engine section in which an engine 16 is mounted approximately in the center between the front and rear wheels 8a and 12a on the left side of the body frame 3;
7 is the front and rear wheels 8b on the right side of the body frame 3;
12b is a driving operation section to which the driving frame 18 is fixed approximately in the center and equipped with a driver's seat 19, a steering handle 20, etc.; 21 is a battery storage chamber provided under the driver's seat 19; 22 is the driving operation section. 1
7, a PTO transmission case 23 mounted at the center of the front of the body frame 3, and drivingly connecting the input shaft to the engine 17;
Reference numerals 24 and 25 indicate left and right row hydraulic motors 9a, 14a, which are interlocked and connected to the transmission case 23, respectively.
Two variable displacement hydraulic pumps for operating 9b and 14b; 26 is a charge pump provided close to the hydraulic pumps 24 and 25; 27 is detachably and directionally connected to the PTO output shaft 28 of the transmission case 23; PTO rear transmission housing,
Reference numeral 29 indicates a shift lever connected to the hydraulic pumps 24 and 25 to perform a traveling shift operation; 30 indicates a PTO shift lever coupled to the transmission case 23;
Reference numeral 1 denotes a hydraulic elevator having a lift arm 32 provided approximately at the center of the rear vehicle frame 2, 33 a lever for lifting and lowering the work equipment for operating the hydraulic elevator, and 34 a three-point link mechanism 37 including a lower link 35 and a top link 36. A rectangular prismatic work equipment mounting frame 38 is horizontally suspended in the left-right direction at the rear of the machine through the frame 38, and is equipped with a tilling rotary 39, a tail wheel 40 for adjusting tillage depth, etc., and is supported by the frame 34 so as to be able to move in parallel. These are two sets of rotary tillage working machines for intermediate tillage, and are configured to run the machines across tobacco cultivation ridges, tea cultivation ridges, etc., and to perform intermediate tillage work using the working machines 38, 38.

As shown in FIG. 3, a hitch bracket 41 and a mounting base 42 are fixedly installed approximately at the center of the rear body frame 2, and the front ends of the lower links 35 are connected to both sides of the hitch bracket 41 via hitch pins 43, respectively. , the hydraulic elevator 31 is attached to a mounting table 42, and the front end of the top link 36 is connected to the top link hinge 44 on the rear side of the elevator 31. In addition, lower links 3 are attached to the lower and upper hitch masts 45 and 46 of the work equipment mounting frame 34.
5 and the rear ends of the top link 36 are connected to each other.

On the other hand, the shaft case 4 is attached to the hitch bracket 41.
7, the PTO shaft 48 is interlocked and connected to the PTO output shaft 28 via the PTO transmission housing 27, and a bracket 49 is attached to the upper surface of the work equipment mounting frame 34 at the approximate center thereof. A PTO transmission box 50 with a vertically symmetrical shape is attached, and universal joints 52a, 5 are attached to the input shaft 51 that projects forward of the box 50.
Via the PTO transmission housing 52 with 2a
The PTO shaft 48 is interlocked and connected.

As shown in FIGS. 4 and 5, there are hexagonal prism-shaped transmission members on both sides of the PTO transmission box 50.
The PTO drive shafts 53, 53 are made to protrude, and the shafts 5 are attached to the bearing metal 55 of the bearing plate 54 which is removably provided at both ends of the work equipment mounting frame 34.
A work equipment hitch mast 58 is suspended via a pair of clamping plates 56 and 57 which are removably wound and fixed to the frame 34 and whose three ends are removably supported by a shaft, and a rotary hitch 59 at the lower end of the mast 58 is attached. The working machine 38 is connected and supported via a hit pin 60. and the working machine 38
A PTO transmission case 61, which is a transmission member, is installed between the shaft 53 and the shaft 53, and the middle of the case 61 is connected to the mast 58 via a bracket 62.The bearing plate 54 is removed from the work equipment mounting frame 34, By extracting the bearing metal 55 from the shaft 53, the transmission case 6
1 can be extracted, and the holding plate 56,
By separating the hitch masts 57, the hitch masts 58 can be extracted from the frame 34, respectively.

As shown in FIGS. 6 and 7, bearing sleeves 64, 64 are removably provided on the left and right sides of the PTO transmission box 50 via bearing plates 63, 63, and the transmission shaft is attached to the bearing sleeves 64. 65 is pivotally supported, and the inner ends of the left and right shafts 65, 65 are removably spline-fitted and connected to the cylindrical shaft 66, and the PTO drive shaft 53 is separated via a roll pin 67 at the outer end of the shaft 65. Combine as possible. The one shaft 65 is connected to the input shaft 5.
1 through bevel gears 68 and 69, and the upper plate 5 of the PTO transmission box 50.
0a and the bottom plate 50b are formed in substantially the same shape, the top plate 50a or the bottom plate 50b is removably fixed to the bracket 49 with bolts 70, and the box 50 is rotated about 180 degrees about the input shaft 51, and the bevel gear When the support position of the input shaft 51 is changed to either the left or right side, the rotation of the input shaft 51 in the same direction is
The PTO drive shaft 53 is configured to be able to be switched between forward and reverse directions.

As shown in FIG. 8, a sprocket 72 for tensioning the transmission chain 71 is installed inside the transmission case 61, and the sprocket 72 is loosely fitted and supported in the case 61 via guide frames 73 and 74.
The boss 72a of the sprocket 72 is pushed into the outside of the case 61, the set bolt 75 is screwed onto the boss 72a, the sprocket 72 is fixed to the PTO drive shaft 53 outside the case 61, and the work machine 38 is moved in parallel. At this time, the transmission case 61 is configured to be able to be moved in parallel by attaching and detaching the bolts 75.

Since the present invention is constructed as described above, the work machine 38, transmission case 61, and PTO drive shaft 53 can be removed depending on the work content, and the hitch masts 45, 46, and 58 can be attached to the work machine mounting frame. 34 extends in the vertical direction, so that when the work implement 38 is lowered to the lowest height, the PTO shaft 48 and the input shaft 51 can be supported at approximately the same height as shown in FIG. The working machine 38 can be driven with the housing 52 suspended substantially horizontally, and the transmitted load on the universal joint 52a of the housing 52 is reduced.

On the other hand, by rotating the PTO transmission box 50, which is formed vertically symmetrically, approximately 180 degrees around the input shaft 51, the rotation of the PTO drive shaft 53 can be reversed, and the working machine Intertilling work can be effectively performed by rotating the rotary 39 of 38 in the forward or reverse direction. In addition, the PTO drive shafts 53, 53 and transmission shafts 65, 65 are connected to a cylinder shaft 66 and roll pins 67, 6.
7, the work equipment mounting frame 34 and each of the shafts 53,
Dimensional errors during machining of the shafts 53 and 65 can be corrected during assembly, thereby preventing bending moment from being applied to each of the shafts 53 and 65. Furthermore, when moving the left and right working machines 38, 38 in parallel according to the groove formation interval between the ridges to approach and separate them, the set bolt 75
is loosened to move the transmission case 61 in parallel, thereby changing the support positions of the work implement 38 and the transmission case 61 at the same time.

As is clear from the embodiments described above, the present invention fixes and supports the hitch mast 58 in a removable manner via the mounting plates 56 and 57 on the horizontally suspended work equipment mounting frame 34 via the three-point linkage mechanism 37.
The work implement 38 is removably attached to the mast 58 via a hitch 59, and the PTO transmission case 61, which transmits the PTO driving force from the PTO drive shaft 53 to the work implement 38, is removably attached to the mast 58 via a bracket 62. Since it is fixedly supported, various types of work equipment 38 can be exchanged via the hitch 59, and the left and right spacing and the number of installations can be adjusted freely. When power is required, the PTO transmission case 61 can be easily installed and various operations can be performed using this driving force, and the PTO transmission case 61 can also be used for towing machines that do not require driving force from the machine side. It is possible to perform maintenance and inspection with a simple structure by easily removing the transmission case 61 and installing only the necessary parts, and also by easily attaching or removing the transmission case 61 alone after installing the various work equipment 38. In addition to making it convenient, the transmission case 61 can be easily replaced with one having a speed change mechanism or with a different specification, and the work applications of these working machines 38 can be expanded, and when the transmission case 61 is used, The work machine 38 is connected to the case 61 and the hitch 59.
This has remarkable effects, such as being able to further improve stability by holding it in place.

[Brief explanation of the drawing]

Fig. 1 is an overall side view showing one embodiment of the present invention, Fig. 2 is a plan view of the same, Figs. 3 and 4 are side views of main parts, Fig. 5 is a rear view of main parts, Fig. 6 Figures to 8th
The figure is an explanatory partial cross-sectional view. 34... Work equipment mounting frame, 37... Three-point link mechanism, 38... Work equipment, 53... PTO drive shaft (transmission member), 61... PTO transmission case (transmission member).

Claims (1)

[Scope of utility model registration request] A hitch mast 58 is fixedly supported in a removable manner via mounting plates 56 and 57 on a horizontally suspended work equipment mounting frame 34 via a three-point link mechanism 37, and the work implement 38 is removably attached to the mast 58 via a hitch 59. to transmit the PTO drive force from the PTO drive shaft 53 to the work equipment 38.
A work equipment mounting device for a management work vehicle, characterized in that a PTO transmission case 61 is detachably fixedly supported on the mast 58 via a bracket 62.