JPS5925717Y2 - Operation lever support device in auxiliary hydraulic control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating lever support device in an auxiliary hydraulic control device.

It is known that the auxiliary valve is installed in a hydraulic system for a main working machine such as a plow or rotary on a truck body, and that hydraulic pressure is taken out from the hydraulic system for work separately from the main working machine. It is installed on one side wall.

This auxiliary valve operation lever is usually provided with its support stay projecting from the hydraulic device, and according to this,
Not only has the control lever installation been standardized, making it difficult to achieve design diversity, but there has also been a recent trend to cover the hydraulic system with a so-called floor cover to improve exterior appearance, ride comfort, and livability. Its installation is extremely inconvenient.

In view of the above-mentioned circumstances, the present invention is designed to ensure stable support while simplifying installation by providing the support stay on a removable crosspiece frame that can also be used as a floor cover support member. In a device that is provided with a hydraulic system for the main working machine, an auxiliary valve that extracts hydraulic pressure for the auxiliary working machine from the hydraulic system, and an operating lever for the valve, both ends of the wheel fender are supported, and the middle part is connected to the hydraulic system. A supported cross-shaped frame is constructed, a plurality of stays are protruded between the wheel fender of the cross-shaped frame and the hydraulic system, and a relay support shaft equipped with an operating lever is relatively rotatably supported on the stay. It is characterized by having an interlocking body for the auxiliary valve on the shaft.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 denotes a tractor body, which includes a transmission case 2 as a structural body, and has steps 3 on both sides at an intermediate portion in the longitudinal direction.

Reference numeral 4 denotes a hydraulic system for the main working machine, which has a pair of left and right rifts and arms 5, and is mounted on the rear upper surface of the vehicle body 1.

6 is a floor cover, and a plurality of support devices 7 are provided on the hydraulic device 4.
It covers the hydraulic device 4, has an upright mud-proof cover 8 at the rear, a hanging cover 9 at the front, and the lower part of the cover 9 is connected to the step 3. It is removably attached to.

Reference numeral 10 denotes a pair of left and right wheel fenders, which are erected to cover the inner sides of wheels 12 driven by wheels 11.

Reference numeral 13 denotes a driver's seat, which is provided on the floor cover 6 via a support device 14 so as to be slidable back and forth.
is located between the wheel fenders 10.

The hydraulic device 4 is a single-acting piston type, and is configured so that when hydraulic pressure is applied to the piston, the lift arm 5 rises, and when the hydraulic pressure is released, the lift arm 5 descends by its own weight, and the control valve for this purpose is as follows. Although not shown, it is built-in.

Control levers 15 and 16 are respectively provided on the support shafts 17 having a double shaft structure, with the former lever 15 being used for position control and the latter lever 16 being used for draft control.

18 is a lever guide device, and the control levers 15, 1
6, a guide groove 22 for the PTO shift lever 21, and a guide groove 24 for the auxiliary control operation lever 23, which are provided in the side area of the driver's seat 13.

Reference numeral 25 denotes an auxiliary valve, and a mounting boss 4A is provided at the lower part of the outer wall of the hydraulic device 4, and one or more valve units are stacked on this as a cassette structure.
Each unit 28 has a switching spool valve 29, and a hydraulic pressure outlet pipe 30 is communicated with the unit 28 to extend to, for example, the rear upper surface of the truck body.

Reference numeral 31 denotes a cross-shaped frame, both ends of which are removably installed on the inner wall of the wheel fender 10 with bolts 32, etc., and an elastic tube is attached to the middle part with stud bolts 33 protruding from the top of both front side walls of the hydraulic device 3. A stay 38 protruding from the frame 31 is supported via a vibration-proof support device 37 comprising a circumferentially grooved cylinder 35, a nut 36, and the like.

This frame-like frame 31 has the front end engaging piece 6A of the floor cover 6 and the upper part of the hanging cover 9 superimposed on each other from the outside and removably joined using bolts made in other countries.

A plurality of stays 3 are provided between the wheel fender 10 and the hydraulic system 4.
9 protrudes, and a support shaft 40 is relatively rotatably supported on this stay 39.The intermediate cylinder 23A of the operation lever 23 is fitted onto the support shaft 40 between the stays 39 so as to be relatively rotatable, and an iron An interlocking body 41 of one spool valve 29 is provided on the cylinder 23A and connected with a headed pin 42, and a cylinder part 23B is fixed to both ends of a support shaft 40 protruding from the stay 39, respectively.
The other operating lever 23 is provided on one cylindrical portion 23B, and another interlocking body 41 is operatively connected to the other spool valve 29 via a head pin 42 on the other cylindrical portion 23B.

Note that the length of the support shaft 40 is changed depending on the number of valve units 28.

In the above configuration, the lift arm 5 is held at the highest position and its hydraulic pressure is guided to the auxiliary valve 25, and when the operating lever 21 is operated back and forth about the support shaft 40, the spool valve 29 is interlocked. It can be switched to open and close via the body 41, and hydraulic pressure can be sent and returned to the hydraulic pressure outlet pipe 30, and auxiliary work equipment (hydraulic drive work equipment, front loader elevating equipment, etc.) can be operated here. .

In the present invention, the tractor body 1 is provided with a hydraulic system 4 for the main work machine, an auxiliary valve 25 is provided for extracting hydraulic pressure for the sub-work beam from the hydraulic system 4, and an operating lever 23 for the valve 25 is provided. A bar-shaped frame 31 supported at both ends by the fender 10 and supported by the hydraulic device 4 at the middle portion is constructed, and the wheels of the bar-shaped frame 31 are connected to the fender 10 and the hydraulic device 4.
A plurality of stays 39 are protruded between them, a relay support shaft 40 having an operating lever 23 is relatively rotatably supported on the stay 39, and an interlocking body 41 of the auxiliary valve 25 is provided on the relay support shaft 40. Since it is a feature, the bar-shaped frame 31
is supported and constructed by the wheel fender 10 and the hydraulic system 4, and the frame 31 is firmly attached thereto.
By providing a stay 39 on this frame 31 and pivotally supporting the spindle 40, the operating lever 23 can be supported stably, and the operating lever 23 is mounted on a bar-shaped frame 31 that is completely separate from the mounting portion of the auxiliary valve 25. 23, even if the position of the auxiliary valve 25 is changed to some extent, the operation lever 23 can be mounted without any change in support, which has the advantage of facilitating installation and enabling multidimensional design.

[Brief explanation of the drawing]

Figure 1 is a side sectional view and plan view of the entire project, Figure 3 is an enlarged plan view of the main part, and an elevation view taken along the arrows in Figure A-A. Figure 2 is an open plan. Figure 4 is Figure 3. 1. River/Rakuta vehicle body, 4. Hydraulic system, 10.
Wheel fender, 23... Operating lever, 25... Auxiliary valve, 31... Crosspiece frame, 39... Stay,
40... Relay support shaft, 41... Interlocking body.

Claims (1)

[Scope of utility model registration request] In an apparatus in which a hydraulic system 4 for a main work machine is provided on the tractor body 1, an auxiliary valve 25 is provided for taking out hydraulic pressure for an auxiliary work machine from the hydraulic system 4, and an operating lever 23 for the valve 25 is provided, the wheel fender 10 is A bar-shaped frame 31 is constructed with both ends supported and a middle portion supported by the hydraulic device 4, and a plurality of stays 29 are protruded between the wheel fender 10 of the bar-shaped frame 31 and the hydraulic device 4, and an operating lever is attached to the stay 39. An operating lever support device for an auxiliary hydraulic pressure control device, characterized in that a relay support shaft 40 having an auxiliary valve 25 is relatively rotatably supported, and an interlocking body 41 of an auxiliary valve 25 is provided on the relay support shaft 40.