JPS6224620Y2 - - Google Patents

Description

[Detailed description of the invention] In a conventional tractor to which a hydraulic work machine can be attached and detached, as shown in FIG. A control valve for operating hydraulic work equipment is installed on the rear surface with an integrated operating lever that extends diagonally backward and upward.

Therefore, when performing work that does not require the use of a hydraulic work machine with a tractor tie, for example, when performing tillage work with a rotary tiller connected to the rear of the tractor tie, as shown in Figure 10, the hydraulic work machine must be removed from the tractor tie. Even if the tractor tie is installed, the control valve with the operating lever remains on the hydraulic work equipment mounting bracket, and the control valve and the operating lever are located close to the operating handle. There were times when the operating levers got in the way of driving the tractor tie, causing problems with the work.

Therefore, in order to eliminate the above-mentioned defects, the present invention has been developed by attaching a control valve for operating the hydraulic working machine to the frame of the hydraulic working machine, which is removably attached to a bracket fixed to both sides of the middle part of the body of the tractor. An operating lever is removably inserted into a control rod facing the rear of the valve, and a locking piece is provided on the operating lever, so that when the hydraulic operating equipment is separated from the tractor and removed, the control valve of the hydraulic operating equipment can be used. is removed from the tractor together with the hydraulic work machine, and the control lever of the control valve is automatically locked to a member on the tractor body by the locking piece, and the control rod of the control valve is removed from the control lever. The hydraulic working machine can be removed from the tractor by removing the control valve's operating lever without touching it, which saves time and effort.It also prevents damage to the machine and allows the operating lever to be attached to and detached from the control rod at will. A hydraulic operating lever device for a hydraulic work machine that can be attached to and detached from a tractor, in which the operating lever can be detached when it is not needed, making it extremely beneficial for getting on and off the tractor, driving, and safety. This is related to.

To explain the structure of the first embodiment of the present invention shown in FIGS. 1 to 6, a is a tractor, 1 is a vehicle body, and 2 is a cockpit wall. A through hole 3 is bored in the middle part of the first side. 4 is a control handle, 5 is a seat, 6 is a front bracket fixed to both sides of the front end of the vehicle body 1, and a pin hole 7 is provided on the outside of the tip.
A boss 8 with a hole is provided protrudingly. Reference numeral 9 denotes U-shaped rear brackets attached to both sides of the middle portion of the vehicle body 1.

b shows a front loader that is a hydraulic working machine that can be attached to and removed from the tractor a, and 10 is a frame on both sides of the front loader. The intermediate part and the intermediate part of the lift arm 11 are connected by a lift cylinder 12, and a side arm 13 is provided protrudingly in front of the intermediate part of the frame 10. A pin hole 14 is bored at the tip of the side arm 13, and a shape is formed inside the tip. A guide metal 15 is provided and a stand 16 is attached to the front end so as to be vertically movable, and a shaft lug 17 is provided protruding from the outside of the lower part of the frame 10. 18 is a bucket of a working device whose rear lower part is pivoted to the tip of the lift arm 11 so as to be able to move up and down.
The middle part of the lift arm 11 and the rear upper part of the bucket 18 are connected by a dump cylinder 19. Reference numeral 20 denotes a control valve attached to the middle part of the rear surface of the frame 10 on the first side.Although not shown, the control valve 20 is connected to the lift cylinder 12 and the dump cylinder 19 through piping, and the control valve 20 is connected to the tractor a. The pressure oil generator is connected with a removable piping. 21 is control valve 2
0 control rod, its tip is bent diagonally backward and upward, and the tip has an appropriate number of holes to prevent the operating lever (described later) that is inserted into it from easily coming out due to machine vibrations, etc. A circumferential groove is provided and a rubber ring 22 is fitted into the circumferential groove, and the elasticity of the rubber ring 22 provides a tight binding property to the insertion part of the operating lever. Reference numeral 23 designates an operating lever, the base of which is formed into a cylindrical body 24, and a locking piece 25 of a size that does not pass through the through hole 3 of the cockpit wall 2 is fixed to the middle part. A label 26 with operating instructions etc. is attached. 2
7 is a fixing pin for fixing the front loader b to the tractor a.

Next, its effect will be explained. When attaching front loader b to tractor a, as shown in Fig. 2, support front loader b on the ground with a stand 16, move tractor a forward from behind, and align the rear bracket 9 of tractor a with the shaft of front loader b. The tractor a is stopped so as to face below the ear 17. Next, after connecting the pressure oil generator of the tractor a and the control valve 20 with piping, the control rod 21 is operated to shorten the lift cylinder 12, and the frame 10 is lowered to lower the shaft lug 1 as shown in FIG.
7 onto the rear bracket 9, the boss 8 faces the opening of the shape guide metal 15 at the same time.
Therefore, when the lift cylinder 12 is further shortened, the stand 16 of the front loader b rises, and while being supported by the shaft lug 17 and the tip of the bucket 18, the downwardly inclined side piece of the shape guide 15 is raised to the boss. 8, and the front loader b slides with its shaft lug 17 on the rear bracket 9.
The tips of the two slide on the ground and move backward. Therefore, if the lift cylinder 12 is shortened until the boss 8 fits into the inner part of the shape guide metal 15 and the pin holes 7 and 14 of the side arm 13 are aligned with each other and its operation is stopped, the operation of the lift cylinder 12 is stopped. Since the shaft lug 17 is engaged with the inner rear part of the rear bracket 9 as shown in FIG. 3, the fixing pin 27 is then inserted into the pin holes 7 and 14 to fix the front loader b to the tractor a. do. After that, the stand 16 is raised, and the cylindrical body 24 of the control lever 23 is inserted from the rear into the through hole 3 of the cockpit wall 2 and press-fitted into the tip of the control rod 21 with the rubber ring 22. , the control rod 21 and the operating lever 23 are fixed integrally, and the front loader b is attached to the tractor a as shown in FIG. Therefore, after that, by operating the operating lever 23, the control rod 21 is actuated to switch the control valve 20, so that the front loader b can be operated.

Therefore, when detaching front loader b from tractor a when performing work on tractor a that does not use front loader b, the lift cylinder 12 is slightly shortened from the state shown in FIG. The inner part of the metal 15 is pressed against the boss 8, the pin holes 7 and 14 are aligned, and the fixing pin 27 is removed. Next, if the lift cylinder 12 is extended after lowering the stand 16, the upper inclined side piece of the shaped guide metal 15 will slide against the boss 8 until the stand 16 touches the ground, and the front loader b will The frame 10 and the lift arm 11 move forward while expanding their angle. While the front loader b is moving forward, the locking piece 2 of the operating lever 23
5 hits the front wall of the cockpit wall 2, after which the operating lever 23 is locked to the cockpit wall 2, and only the front loader b continues to move forward, and the front loader b
The control rod 21 of the control valve 20 accompanying the control valve 20 slides out of the cylindrical body 24 of the operation lever 23, and the operation lever 23 automatically detaches from the control rod 21 as shown in FIG. The lever 23 falls due to its own weight.

When the stand 16 touches the ground, the shaft lug 17 moves to the middle part where the upper part of the rear bracket 9 is open, as shown in FIG. Therefore, when the lift cylinder 12 is further extended, the stand 16 with the side arm 13 rotates clockwise in FIG.
7 is spaced above the rear bracket 9. Therefore, when the pipe connecting the pressure oil generator of tractor a and the control valve 20 is disconnected and the tractor a is moved backward, the front loader b is supported by the stand 16 as shown in FIG. It can be separated from tractor a.

On the other hand, even when the front loader b is attached to the tractor a, the operating lever 23 can be detached from the control rod 21 by pulling it backward, so when driving on the road or when the operator leaves the machine, etc. , it is beneficial for operation and safety to remove the operating lever 23.

Note that instead of the rubber ring 22 of the control rod 21, other devices may be provided at the tip of the control rod 21, such as attaching a suitable elastic body to the insertion part of the operating lever 23 to provide a tight binding property. Often, if there is no possibility that the operating lever 23 will fall off due to vibration etc. while the machine is operating, the operating lever 23
The insertion part 3 does not necessarily have to have binding properties.

The configuration of the insertion part of the operating lever 23 into the control rod 21 is reversed to the above, and the control rod 2
Even if the cylinder body 24 is fixed to the tip of the cylinder body 1, the rubber ring 22 is attached to the operating lever 23, and the operating lever 23 is inserted and attached into the cylinder body 24, the same effect as described above is obtained.

The locking piece 25 of the operating lever 23 may be of any size as long as it comes into contact with the cockpit wall 2 when the front loader b is moved forward when the front loader b is disengaged from the tractor a, and its shape may be arbitrary. You can choose.

Insert the operating lever 23 with the locking piece 25 into the through hole 3 of the cockpit wall 2 to connect the tractor a of the front loader b.
Instead of locking the locking piece 25 to the cockpit wall 2 when the front loader b is released from the tractor a, the locking piece 25 of the operating lever 23 is provided on the vehicle body 1 of the tractor a when the front loader b is separated from the tractor a. frame support,
The same effect as described above can be obtained even if it is secured to a stay of a rear view mirror, a stay of a turn signal, etc.

A second embodiment of the present invention shown in FIG. 7 has a locking piece 25 of the operating lever 23 in the above embodiment,
Using the operating lever 23' bent in a square shape, insert the cylindrical body 24' of the operating lever 23' into the control rod 21 and engage the intermediate piece 25' of the above embodiment in the same manner as in the above embodiment. It is designed to have the effect of the piece 25.

Even with this structure, the front loader b
When detaching the front loader from the tractor a, move the front loader b forward in the same manner as in the above embodiment. During the forward movement of the front loader b, the intermediate piece 25' of the operating lever 23' After it hits the front wall of the cockpit wall 2, the operating lever 23' is automatically detached from the control rod 21 in the same manner as described above, and the operating lever 23' falls and the front loader b is moved to the tractor. Leave from a.

Also, like the operating lever 23 in the above embodiment, this operating lever 23' is detached from the control rod 21 when the operating lever 23' is not used when the front loader b is attached to the tractor a. be able to.

In the third embodiment of the present invention shown in FIGS. 8 and 9, instead of the locking piece 25 of the operating lever 23 in the first embodiment, leather or rubber is provided on the outside of the through hole 3 of the cockpit wall 2. Locking piece 25″ for bellows type boots made by
The base of the cylindrical body 24 of the operating lever 23 is inserted and fixed thereto, and its locking piece 25'' functions as the locking piece 25 of the first embodiment. .

Even with this structure, the front loader b
To separate the front loader b from the tractor a, operate the front loader b in the same manner as in the first embodiment.
When the front loader b is moved forward, after the locking piece 25'' is fully extended during the forward movement of the front loader b, the operation lever 23 is supported by the locking piece 25'' and acts in the same manner as described above. As shown in FIG. 9, the operating lever 23 is automatically detached from the control rod 21, and the operating lever 23 is pushed against the cockpit wall by its own weight.
The front loader b separates from the tractor a by hanging inward from one side of the front loader.

Furthermore, even when the front loader b is attached to the tractor a, if the operating lever 23 is not used, the control lever 23 is
It can be detached from 1.

In the present invention, the hydraulic operating lever device of a hydraulic working machine that can be attached to and detached from a tractor is configured as described above, so when a hydraulic working machine such as a front loader is detached from a tractor, after releasing their fixation, When the tractor is separated from the hydraulic work equipment by operating the machine, the locking piece of the operating lever hits a member on the tractor's body during the separation, and the control rod then locks against the operating lever. While sliding, the tractor and the hydraulic work machine move away from each other, the operating lever automatically disengages from the control rod, and the hydraulic work machine separates from the tractor. Therefore, when the hydraulic work machine is detached from the tractor, the control lever of the control valve of the hydraulic work machine is detached from the control rod without touching, so there is no need to remove the control lever in advance and the hydraulic work machine can be used. In addition to saving time and effort when disengaging the work equipment, the operator can operate the machine with peace of mind without damaging the cockpit wall or the control valve with the control lever due to the control lever. In addition, the control valve and the control lever of the control valve are removed along with the hydraulic work equipment, increasing the space near the tractor's control handle, making it easier to operate the tractor. It is possible to easily get on and off the vehicle and drive the tractor, and also to perform other tasks using the tractor easily and accurately.

Furthermore, when the operating lever is pulled, it is detached from the control rod of the control valve with one touch. Therefore, if the operating lever is detached from the control rod when the hydraulic working machine is not used, such as when driving on a road, there is no operating lever in close proximity to the operator, making it easier to operate, and more space required for getting in and out of the operator's cabin can be secured.
Not only can passengers easily get in and out of the operator's cab, but if an unexpected danger such as tipping over or cargo scattering occurs while driving on the road, the operator can quickly and easily disembark, which is beneficial in terms of safety as it prevents accidents such as the operator being crushed by the tractor as occurred in the past.

In addition, because the control valve's operating lever is detached, the control valve may be switched due to vibrations of the machine when driving on rough roads, causing hydraulic work equipment such as the lift arm of a front loader to operate. , there is no possibility that the operator will unconsciously operate the control lever and the hydraulic work equipment will operate against the operator's will, and this will prevent unexpected disasters. In cases where it is dangerous to operate the control valve under conditions such as when the operator is not looking at the machine or when there is a possibility that a nearby child may operate the control valve,
If the operating lever is detached from the control rod, it is safe, the structure is simple and can be easily manufactured at low cost, and the fixing is reliable and firm.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a tractor with a front loader according to a first embodiment of the present invention, FIG. 2 is a partially cutaway side view of the front loader detached from the tractor, and FIG. 4 is an enlarged side view with a part cut away of the main parts of the same, FIG. 3 shows the front loader in a state when it is attached to the tractor, and FIG. 4 shows the state in the middle of removing the front loader from the tractor. Fig. 5 is an enlarged side sectional view of the attachment part of the operating lever to the control rod, Fig. 6 is a sectional view taken along the - line in Fig. 5, and Fig. 7 is a sectional view taken along the line -
The figure is a partially cutaway side view of a main part of a tractor with a front loader according to a second embodiment of the present invention, and FIGS. 8 and 9 are main parts of a tractor with a front loader according to a third embodiment of the present invention. FIG. 8 is a partially cutaway side view of the front loader, and FIG. 9 shows the front loader when it is attached to the tractor, and FIG. 9 shows the front loader in the middle of being removed from the tractor. FIG. 10 is a partially cutaway side view of a rotary tiller connected to the rear of a tractor to which a conventional front loader can be attached. a... Tractor, 1... Vehicle body, 9... Bracket, b... Hydraulic working machine, 10... Frame,
20...Control valve, 21...Control rod, 23...Operation lever, 24...Cylinder body, 2
5...Latching piece.

Claims (1)

[Scope of utility model registration request] A control valve for operating the hydraulic working machine is attached to the frame of the hydraulic working machine, which is removably attached to brackets fixed to both sides of the middle part of the tractor body, and the base of the operating lever is attached to the control rod facing the rear of the control valve. The end barrel body is removably inserted and inserted into the operating lever, and the operating lever is engaged with a member on the vehicle body of the tractor when the hydraulic working machine is detached from the tractor to prevent the operating lever from moving along with the control rod. A hydraulic operating lever device for a hydraulic working machine that is attached to and detached from a tractor and is provided with a locking piece.