JPS6218101Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hydraulic operating device for a tractor.

In tractors, the main valve is fixed to the valve support and the main valve is operated by a control lever, but any number of sub-valves can be installed between the valve support and the main valve depending on the application. There is a need to. Therefore, the positions of the main valve and the control lever vary depending on the number of sub-valves selected, and for this purpose a plurality of grooves are formed in the cover near the driver's seat, allowing the control lever to protrude. However, such a valve is unsightly because the unused groove is exposed to the outside, and each time a sub-valve is replaced, the control lever must be replaced and the connection between the control lever and the main valve must be reconnected. Additionally, the operator is confused because the position of the control lever changes.

This idea was created in consideration of the above points, and it makes the mounting position of the control lever constant, eliminates the need to form multiple grooves on the cover or fender to pull out the control lever, and improves the appearance. Another object of the present invention is to provide a hydraulic operating device for a tractor that can improve operability.

This idea involves mounting a sub-valve and a main valve one on top of the other on one side of a valve support, rotating an operating shaft around its axis using the rotational force of a control lever, and using that rotational force to operate the main valve. The position of the main valve from the valve support body changes depending on the number of units installed, but the operating shaft is slid relative to the control lever to create an operating force transmission path from the control lever to the main valve via the operating shaft. Therefore, regardless of the change in the number of sub-valves installed, the control lever can be positioned in the same plane, and only one groove for the control lever can be machined on the cover or fender, improving the appearance. This structure is designed to improve the operability of the control lever.

An embodiment of this invention will be explained based on the drawings.
A cylinder case 3 containing hydraulic circuit components is provided under a driver's seat 2 of a tractor body 1.
A valve cover 4, which is a valve support, is fixed to one side of the cylinder case 3, and a sub valve 5, a main valve 6, and a bracket 7 are sequentially stacked on one side of the valve cover 4 with bolts 8 passing through them. It is installed in

Next, a U-shaped support 9 is fixed to the upper part of the bracket 7. This support 9 is attached to be slidable along the longitudinal direction of the operating shaft 10 while rotatably holding the operating shaft 10 along the arrangement direction of the sub-valves 5 and the main valves 6. The operating shaft 10 transmits its rotational force to the main valve 6 via a link mechanism 11 to switch the main valve 6, and a plurality of threaded holes 12, 13, 14 are provided on the outer periphery of the operating shaft 10 to connect the sub-valve 5. They are arranged in the axial direction with equal spacing that corresponds to the thickness. A groove 16 is formed in the cover 15 beside the driver's seat 2, and a piece 18 that is slidably fitted to the operating shaft 10 is fixed to the lower end of the control lever 17 inserted into the groove 16. The piece 18 has the screw holes 12, 13, 1
A screw 19 is inserted into one of the screws 4.

In such a configuration, when there is only one sub-valve 5 as shown in FIG. 2, the screw 19 is screwed into the outer screw hole 14. When the two sub-valves 5 are inserted between the main valve 6 and the valve cover 4 as shown in FIG.
into the center screw hole 13. Or the fourth
As shown in the figure, when three sub-valves 5 are used, the screws 19 are screwed into the inner screw holes 12.

In either case, when the control lever 17 is rotated, the operating shaft 10 rotates integrally, and the rotational force is transmitted to the main valve 6 by the link mechanism 11. Therefore, no matter how many sub-valves 5 are used, the position of the control lever 17 remains the same, allowing the operator to perform operations with which he or she is accustomed. Moreover, since only one groove 16 needs to be formed, the appearance is improved. Since there is no need to selectively move the control lever 17 in and out of a plurality of grooves, there is no possibility that the covers 15 will be scratched.

Since this device is configured as described above, the control lever can be operated in a fixed position even if the number of sub-valves used changes.
This improves operability and eliminates the work of attaching and detaching the control lever.Furthermore, it is only necessary to form one groove in the cover or fender for the control lever to protrude.
It has effects such as being able to improve the appearance beauty.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a side view, and Figures 2 to 4 are partially enlarged front views with different sub-valves used. 4... Valve cover (valve support), 5...
Sub valve, 6...Main valve, 10...Operation shaft, 17...Control lever.

Claims (1)

[Scope of utility model registration request] A plurality of sub-valves selected in arbitrary numbers and a main valve are sequentially mounted one on top of the other on one surface of a valve support, and an operating shaft for operating the main valve by rotational movement is aligned along the arrangement direction of the sub-valves and the main valve. a control lever is provided so as to be slidable and rotatable around its axis, and a control lever is rotatably provided in a specific plane intersecting the operating shaft;
A hydraulic operating device for a tractor, characterized in that the operating shaft is connected to the control lever so that it can be slid in the axial direction while being prevented from rotating.