JPH1094317A - Hydraulic valve device of mobile work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic valve device where the maintenance such as checking, adjustment and exchange, etc., of a valve mainbody being the main part of a hydraulic valve and a change-over valve is easily executed, the valve mainbody has no trouble for the disposition of oil remained inside at the time of resolution and dust is prevented from invading in a hole where the change-over valve is inserted at the time of assembling. SOLUTION: Respective work devices are mounted on a running vehicle body and constituted by executing an actuation by pressure oil for an operation transferred to a successively provided hydraulic cylinder and the hydraulic valve constituting a hydraulic device 3 is attached to the end part frame 5 of the running vehicle body. The valve mainbody 6 being the main part of the hydraulic valve is provided in the outside of the end part frame 5 and a change-over valve insertion hole 7 is opened downwards in a longitudinal direction. The change-over valve 8 is constituted by being inserted to the change- over valve insertion hole 7 from the lower side opening so as to be freely insertion/ejection possible and being set and is also constituted so as to change- over an oil path by the change-over actuation of a juxtaposed solenoid 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic valve device mounted on a mobile working machine, for example, a working machine such as a combine, and belongs to the technical field of hydraulic equipment.

[0002]

2. Description of the Related Art Conventionally, a combine has been used as an automatic level control system for a vehicle body (rolling control system, pitching control system)
A variety of automatic control devices, such as an automatic control device and a cutting height automatic control device, are mounted, and a configuration automatically controlled by a control device using a microcomputer is adopted. Each device such as an automatic level control device receives the operation signal output from the control device based on the detection of the sensor, the solenoid valve of the hydraulic device is switched, and the device is operated by the supplied oil. Had become.

[0003] In addition, the cutting and lifting device and the cutting slide device are operated by turning an operation switch on and off according to the operator's will.
The solenoid valve is switched by performing an OFF switching operation, and the solenoid valve is operated by the supplied oil. These conventional hydraulic devices employ a whole disassembly system instead of a cartridge system using replacement parts, and are usually housed using a space formed below the cockpit step. Configuration.

[0004]

In the above-mentioned conventional hydraulic apparatus, when performing maintenance such as inspection, maintenance, and replacement of a valve body and a switching valve, which are main parts of a hydraulic valve, the entire hydraulic apparatus is disassembled by dismounting it from a traveling vehicle body. It was a configuration that could not be done otherwise. In addition, the valve body may be troubled by the treatment of oil remaining inside the valve body during disassembly, or dust may enter the hole into which the switching valve is inserted during assembly.

In contrast to such a conventional type, the present invention makes it possible to easily carry out maintenance by simply pulling out the switching valve from the hydraulic valve body to the lower side by the technical means described later. In particular, when collecting the residual oil, since the switching valve insertion hole is directed downward, a waste oil tank can be provided at the lower side to collectively collect the residual oil. Further, since the switching valve insertion hole is also downward during assembly, dust It is intended to provide a device that does not have to worry about intrusion.

[0006]

The present invention takes the following technical means in order to solve the above-mentioned problems. That is, a hydraulic valve 4 of a hydraulic device 3 for sending hydraulic oil for operation to a working device 2 provided on the traveling vehicle body 1 is attached to an end frame 5 that frames the traveling vehicle body 1 and provided.
A valve body 6, which is a main part of the hydraulic valve 4, is provided outside the end frame 5 with a switching valve insertion hole 7 opened at a lower end in a vertical direction. Switching valve 8 that can be freely inserted and set upward from the opening of the valve
Is a hydraulic valve device of a mobile work machine which is configured to be able to perform a switching operation by installing a solenoid 9.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the configuration will be described.
The traveling vehicle body 1 is made up of left and right traveling frames 12, 12 'formed by rollers 11 and 11' molded into an endless band using rubber as a material.
A plurality of idler wheels 13 are mounted on the drive sprockets 15 and 15 ′ of the traveling transmission device 14 so as to be propelled without sinking not only in dry fields but also in wet fields. Then, the running frames 12, 1
2 'is vertically swayable by left and right swing arms 17, 17' provided before and after the center frames 16, 16 ', and the swing arms 17, 17' are arranged in front and back. Link 1
8 and can be linked.

Then, the left and right hydraulic cylinders -19, 1
9 'has a base portion pivotally connected to a horizontal machine frame 20 and a distal end piston side connected to rotating members 21, 21'. The rotating members 21 and 21 ′ are connected to the front rocking arm 17 via the rear rocking arm 17 ′ and the connecting rod 18 on both left and right sides, so that the hydraulic cylinders 19 and 19 ′ can be extended and contracted. In connection therewith, the running frames 12, 12 'are vertically moved independently, that is, a so-called vehicle body horizontal control action (rolling action) can be performed.

[0009] In addition to the working device 2 described above, the working device 2 that operates using a hydraulic device 3 includes a cutting slide device, an operating device for a grain discharging auger 22, a cutting vertical Devices, direction control devices and the like. Next, the hydraulic circuit of each working device 2 described above will be described with reference to FIG. First, the hydraulic valve 4 includes a direction control switching valve 4a.
, The cutting vertical switching valve 4b, the discharge auger switching valve 4c, the cutting slide switching valve 4d, and the vehicle body horizontal switching valves 4e and 4f are integrally formed as a valve unit. Each hydraulic valve 4 is composed of a valve having four ports and three positions, and has a valve structure that can be switched by a solenoid 9.

The oil supply side oil passage 23 is connected to the hydraulic pump 2
4 through the flow-priority valve 25, a constant (3 l / min) amount of oil is constantly supplied to the direction control switching valve 4a. The other switching valves 4b, 4c, 4d,
Pipes 4e and 4f are provided so that oil can be sent from the flow-priority valve 25 through an oil passage 26. In addition,
27 indicates a reflux oil passage. And, the switching valve 28
The recirculation oil passage 29 leading to the direction control switching valve 4a is connected to the tank 30, and the oil passage 26 is connected to the flow-priority valve 2.
The communication is switched to the fifth side.

The direction control switching valve 4a includes left and right hydraulic cylinders 31 and 31 'for operating the side clutch.
And the cutting upper and lower switching valve 4b
Is connected so as to be able to feed oil to the cutting vertical cylinder 32, the discharge auger switching valve 4c is connected so as to be able to feed oil to the auger adjusting cylinder 33, and the cutting slide switching valve 4d is The vehicle body horizontal switching valves 4e and 4f are configured to communicate with the slide cylinder -34 so as to be able to send oil, and to communicate with the left and right hydraulic cylinders-19 and 19 'described in the above configuration example.

The variable relief valve 35 for power steering in the circuit makes the hydraulic pressure to be sent to the brake device proportionally high according to the degree of operation of the power telescopic lever (not shown), and the side brake on the side where the side clutch is disconnected. -Key is made to work in order. The hydraulic valve 4 configured as described above
Are operated automatically based on a control signal output from the controller (directional control switching valve 4a, vehicle body horizontal switching valve 4e, 4f), and those operated by operating an operation switch (cutting up and down) Switching valve 4b,
It can be classified into two systems: a discharge auger switching valve 4c and a cutting slide switching valve 4d).

The valve unit constructed as described above is
The valve body 6 is attached to the end frame 5 at the rear part of the traveling vehicle body 1, the valve body 6 is arranged outside the end frame 5, and the switching valve insertion hole 7 having an opening at the lower end is directed vertically. Provided. As shown in FIG. 1, the switching valve 8 has an oil passage switching portion 8 a formed on the upper side, a solenoid 9 mounted on the lower side, and inserted into the switching valve insertion hole 7 from an opening at the lower end by a nut 36. It is configured to be fastened and fixed. Note that, in the embodiment of FIG.
The stage 4 is configured such that the upper side is a push type and the lower side is a pull type.

Then, the combine pivotally mounts a pre-cutting device 39 comprising a cutting device 37 and a grain culm transport device 38 to the front of the traveling vehicle body 1, and places a threshing device 40 on the traveling vehicle body 1.
To carry out harvesting and threshing work. The cutting pre-processing device 39 is provided with the above-described cutting vertical cylinder.
32 so that it can be moved up and down. Next, another embodiment of the hydraulic circuit shown in FIG. 6 will be described.

In this case, the cutting slide switching valve 4d
Is always constant (3 l) independent of the engine speed.
/ Min) through the flow-priority valve 25 to which the amount of oil is fed.
3. The cutting slide device is shown in FIG.
As shown schematically in FIG. 1, the slide support device 4 provided at the front end of the reaper main frame 41 containing the transmission shaft therein.
The slide cylinder 43 supports the slide cylinder 43 so as to be freely slidable left and right, and the slide cylinder 43 supports a main part of a pre-cutting device 39 such as a cutting device 37 in a connected manner. The slide cylinder -34 is connected and supported between the fixed-side mowing main frame 41 and the slide cylinder 43 provided with the slide-side pre-cutting device 39, and is supplied with oil from the mowing slide switching valve 4d. The mowing slide is performed by expanding and contracting with pressure oil.

In another embodiment constructed as described above, a fixed amount of oil is constantly supplied from the flow-priority valve 25 to the oil passage 23 irrespective of the rotational speed of the engine. Is performed constantly and stably, the operability is improved, and breakage or the like can be prevented beforehand. Next, another embodiment of the hydraulic circuit shown in FIG. 8 will be described.

The vehicle body horizontal switching valves 4e and 4f are constituted by using a high-speed response solenoid valve instead of the conventional normal type. As shown by the pulse signal in FIG. 9, this high-speed response solenoid valve can respond sensitively to each signal that changes in an analog manner from a pulse signal having a short period to a pulse signal having a long period. Therefore, the high-speed response solenoid valve can be configured such that the response speed can be selected and set in advance in the cockpit. .

As described above, another embodiment is characterized in that high-speed pulse control can be selectively performed as required, and therefore, horizontal control can be performed sensitively in response to high-speed running. . Another Embodiment 1 Next, another embodiment 1 will be described with reference to FIGS.

Another embodiment 1 is an example of a construction relating to the attachment of a silencer connected to an exhaust position of an engine. The silencer 50 has flanges 54, 54 ′ that open both the upper and lower sides of one side of the sound deadening chamber 51 and connect the exhaust pipe 53 of the engine 52. The silencer 50 is provided with a connecting portion 56 of a muffler 55 on the other side of the silencing chamber 51.

Therefore, when the exhaust pipe 53 is connected to one of the upper and lower flanges 54 or 54 'and communicates with the exhaust position of the engine 52, the silencer 50 is connected to the other flange 54 or 54' on the other side. , 5
4 'is used for fixing. And
The bracket 57 has a silencer 50 attached thereto by a flange 54 ′ on one side and an attachment stay 58.

In this case, the bracket 57 is mounted on the flange 5
It is configured so as to be joined to and tightly attached to the 4 'to function as a lid for a communication hole with the exhaust pipe, thereby preventing leakage of exhaust gas. Since the first embodiment is configured as described above, the silencer 50 can be firmly fixed to the bracket 57 using the mounting stay 58 and the flange 54 'on one side, and can sufficiently withstand vibration and the like. Configuration. In addition, the bracket 57 has the advantage that it functions as a lid for the communication hole in close contact with the flange 54 'on one side and does not require another lid.

Next, the operation of the embodiment of the present invention will be described. First, the engine is started to drive the rotating parts of the machine body, and the control switches of the respective parts are turned ON to prepare for work. Then, when the traveling vehicle body 1 moves forward,
The cereal culm in the field is cut by the reaping device 37 of the pre-cutting processing device 39, transported by the cereal culm transport device 38, and supplied to the threshing device 40. In this way, the grain culm that has reached the threshing device 40 is subjected to a threshing action in a handling room, and then sent to a sorting chamber where the grain is harvested by the sorting tank.

During such work, each working device 2
Performs harvesting and threshing while being hydraulically operated by the operation of the hydraulic valve 4 that switches based on a control signal or an ON / OFF operation of an operation switch. Next, maintenance work of the hydraulic device will be described. First, a disassembling operation is started by preparing a waste oil tank for recovering residual oil below the valve body 6. The valve body 6 of the hydraulic valve 4 loosens the nut 36, pulls out the switching valve 8 from the switching valve insertion hole 7 through the lower opening, and removes the solenoid 9 from the switching valve 8 to disassemble each part.

At this time, as shown in FIG. 2, the valve body 6 has the switching valve insertion hole 7 in the vertical direction and is open at the lower side, so that the oil remaining inside does not scatter around. , Which can flow downward and be collected in a waste oil tank provided. The valve body 6 is thus
The switching valve 8 and the solenoid 9 can be separated from the main body to perform maintenance.

Next, when the valve body 6 is assembled after inspection and maintenance, the switching valve insertion hole 7 is disposed downward as described above, so that dust or the like may fall into the switching valve insertion hole 7. There is an advantage that there is no danger of preventing functional failure due to dust mixing or the like.

[0026]

As described above, according to the present invention, the hydraulic valve of the hydraulic device for sending operating hydraulic oil to the working device provided on the traveling vehicle body is attached to the end frame that forms the traveling vehicle body. A valve body, which is a main part of the hydraulic valve, is provided outside the end frame with a switching valve insertion hole having a lower end opened vertically, and the opening of the switching valve insertion hole is provided. The switching valve, which can be inserted and removed freely from above, is set so that a switching operation can be performed by installing a solenoid. Therefore, the switching valve can be easily pulled out from the valve body to the lower side. Can be performed very easily.

In particular, since the switching valve insertion hole is directed downward, the residual oil can be collectively collected by providing a waste oil tank below, and further dust and the like enter the switching valve insertion hole during assembly. It also has a unique effect without worry.

[Brief description of the drawings]

FIG. 1 is a side view, partially broken away, of an embodiment of the present invention.

FIG. 2 is an exploded side view of the embodiment of the present invention.

FIG. 3 is a hydraulic circuit diagram according to the embodiment of the present invention.

FIG. 4 is a plan view of the embodiment of the present invention.

FIG. 5 is a side view of the combine according to the embodiment of the present invention.

FIG. 6 is a hydraulic circuit diagram showing another embodiment of the present invention.

FIG. 7 is a schematic plan view showing another embodiment of the present invention.

FIG. 8 is a hydraulic circuit diagram showing another embodiment of the present invention.

FIG. 9 is a time chart showing a pulse period according to another embodiment of the present invention.

FIG. 10 is a perspective view showing another embodiment 1 of the present invention.

FIG. 11 is a side view showing another embodiment 1 of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 2 Working device 3 Hydraulic device 4 Hydraulic valve 5 End frame 6 Valve body 7 Switching valve insertion hole 8 Switching valve 9 Solenoid

Continuation of the front page (72) Inventor Marohito Yamashita 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A hydraulic valve for a hydraulic device for supplying operating hydraulic oil to a working device provided on a traveling vehicle body, the hydraulic valve being attached to an end frame that frames the traveling vehicle body. The valve body is disposed outside the end frame with the switching valve insertion hole with its lower end opened vertically, and is inserted freely into and out of the opening of the switching valve insertion hole. The switching valve to be set is a hydraulic valve device for a mobile work machine, which is configured to enable switching operation with a solenoid.