KR102591924B1 - Power clutch assembly for agricultural machinery - Google Patents

Abstract

The present invention relates to a power clutch assembly for agricultural machinery, and includes a power clutch body 100 mounted on one side of the clutch pack 10 of agricultural machinery and connected to the fluid supply line 110, and a power clutch assembly 100 mounted on the main body 100. A cylinder 120 provided by coupling a rod to the clutch lever 20 interlocking with the clutch plate and connecting the first fluid transfer port 121 and the second fluid transfer port 122, and a release or engage signal Therefore, the solenoid valve 130 is provided to switch the first fluid transfer port 121 and the second fluid transfer port 122, and is mounted on the first fluid transfer port 121 and transferred to the cylinder 120. It includes a pressure reducing valve 140 that sets the pressure of the fluid and transmits kinetic energy to the clutch lever 20, and on the second fluid transfer port 122, the cylinder 120 is operated by the load of the clutch lever 20. ) and a flow control module 150 that is provided to control the flow rate by absorbing or discharging the fluid transferred from the cylinder 120 by passing and discharging the fluid transferred from the cylinder 120 by the load of the clutch lever 20 to control the stroke of the fluid. It is equipped with a speed control module 160 to control the power transmission speed in the process of engaging the clutch plate, thereby minimizing the shock to the agricultural machinery operator and ensuring smooth driving.

Description

Power clutch assembly for agricultural machinery and its operating method {POWER CLUTCH ASSEMBLY FOR AGRICULTURAL MACHINERY}

The present invention relates to a power clutch assembly for agricultural machinery and a method of operating the same. More specifically, in a power clutch that hydraulically controls the clutch plate of a manual transmission of agricultural machinery, control is performed by button operation instead of the conventional clutch pedal during starting and gear shifting. and a power clutch assembly for agricultural machinery that provides smooth operating force and minimizes shock to the driver.

In general, a power clutch that hydraulically controls the clutch plate that transmits/blocks the power of agricultural machinery transmissions such as tractors is equipped to adjust the power transmission/blocking speed with a hydraulic valve to prevent excessive clutch operating force when shifting gears. do.

The power clutch transmits kinetic energy to the clutch lever as the cylinder moves forward and backward by hydraulic pressure and transmits/blocks power between the engine and transmission by releasing/engaging the clutch plate to the flywheel.

As an example of a known technology related to such a clutch control mechanism, Korea Registered Utility Model No. 20-0133292 includes a clutch pedal, a clutch master cylinder that supplies oil in the oil tank by pressurizing the clutch pedal, and a clutch master cylinder that supplies oil from the clutch master cylinder. In a vehicle clutch consisting of a clutch release lever that operates the clutch by oil, it has an inlet port through which oil supplied from the clutch master cylinder flows through a hydraulic line, and has a clutch release lever and a rod inside through a rod. The vehicle's clutch control device includes a clutch cylinder on which the connected piston is installed to slide, a solenoid valve installed on the hydraulic line, and a controller that turns the solenoid valve on/off based on a clutch operation signal.

As another example, Korean Registered Utility Model No. 20-0098883, in the hydraulic reaping and threshing automatic clutch of a combine, includes a clutch lever mounted on the fixed frame of the traveling frame to control the power of the reaping and threshing unit during the combine's operation. By operating the installed solenoid valve a and solenoid valve b, the hydraulic cylinder is raised and lowered to rotate the clutch lever around the hinge axis, and the rotation of the reaping clutch wire operates the tight arm and clutch arm to provide power to the reaping pulley and threshing pulley. It constitutes a hydraulic reaping and threshing automatic clutch of a combine that is controlled by the tension of the pulley and valve.

As another example, Korean Patent No. 10-0222825 consists of a master cylinder that supplies oil from the oil tank to the release cylinder according to the operation of the clutch pedal, and when the clutch pedal is depressed, the oil in the oil tank is released through the master cylinder. In the hydraulic clutch, which is supplied to the cylinder and has a structure that blocks the clutch by pushing the release fork, a valve formed in the hydraulic line to gradually adjust the return speed of the hydraulic pressure returned from the release cylinder to the oil tank, and a pivot of the pedal It constitutes a hydraulic clutch operating device provided with a hydraulic control means having a pedal release angle detection sensor provided on the shaft and a signal controller that receives signals from the release angle detection sensor and controls the operation of the valve.

Korean Registered Utility Model No. 20 - 0133292 (1999.02.18) Korean Registered Utility Model No. 20 - 0098883 (1996.05.17) Korean Patent No. 10 - 0222825 (1999.10.01) Korean Registered Utility Model No. 20 - 0198879 (2000.10.02)

The power clutch to which the above prior art is applied consists of a cylinder that moves the piston by hydraulic pressure to operate the clutch release lever, a solenoid valve installed on the hydraulic line, and a controller that turns the solenoid valve on/off. It is made to transmit/block power between them.

However, like this conventional manual transmission tractor, the operating mechanism in which a person directly operates the clutch pedal with his or her foot and then operates the shift lever and forward/reverse lever when starting and shifting is used to operate agricultural machinery that has a greater load and operating frequency than a car. It has the disadvantage of requiring a high level of fatigue.

Additionally, in the power clutch of the prior art, a sudden operating force is applied in the process of releasing/engaging the clutch plate to the flywheel, which inevitably causes the engine to turn off or rattle.

Therefore, when the driver shifts the vehicle, the speed at which the power of the clutch and transmission is transmitted cannot be smoothly controlled, resulting in a problem in which shock is transmitted to the driver while driving.

In order to improve this problem, another prior art includes a configuration for controlling the operation of a valve formed in a hydraulic line by installing a detection sensor to control the speed of hydraulic pressure returning from the release cylinder to the oil tank. The disadvantage is that the configuration is complicated and detailed control is difficult.

Accordingly, the present invention was invented to solve the problems of the prior art as described above.

A power clutch body (100) mounted on one side of the clutch pack (10) of agricultural machinery, operated by an operation button mounted on the shift lever and forward/reverse lever, and connected to the fluid supply line (110),

A cylinder 120 mounted on the main body 100, coupled with a rod to a clutch lever interlocking with the clutch plate, and connected to a first fluid transfer port 121 and a second fluid transfer port 122,

A solenoid valve 130 provided to switch the first fluid transfer port 121 and the second fluid transfer port 122 according to a release or engage signal;

It includes a pressure reducing valve 140 mounted on the first fluid transfer port 121 and configured to set the pressure of the fluid transferred to the cylinder 120 and transfer kinetic energy to the clutch lever,

On the second fluid transfer port 122,

A flow control module 150 provided to control the flow rate by absorbing or discharging fluid transferred from the cylinder 120 by the load of the clutch lever,

The speed control module 160 is equipped to control the stroke of the fluid by passing and discharging the fluid transferred from the cylinder 120 by the load of the clutch lever, and controls the power transmission speed in the process of engaging the clutch plate. By configuring it to do so, it is possible to achieve the goal of minimizing the shock to the agricultural machine operator and ensuring smooth driving.

The present invention constitutes a power clutch assembly for agricultural machinery that can control the flow rate and stroke of the fluid during the operation of the clutch plate when the agricultural machinery driver shifts the vehicle, and presses the power clutch operation button mounted on the shift lever and forward/reverse lever to press the lever. It controls the clutch and provides power transmission/blocking.

Therefore, the present invention reduces operator fatigue by enabling more detailed and stable control compared to the conventional clutch pedal operation method by using a hydraulic cylinder and hydraulic valve, and reduces sudden operating force in the process of releasing/engaging the clutch plate to the flywheel. This has the effect of eliminating the problem of the engine turning off or shaking and providing a smoother starting and shifting feel by minimizing the shock transmitted to the driver.

1 is a perspective view of a power clutch assembly for agricultural machinery according to the present invention.
Figure 2 is a front view of a power clutch assembly for agricultural machinery according to the present invention.
Figure 3 is a side view of a power clutch assembly for agricultural machinery according to the present invention.
Figure 4 is a schematic hydraulic circuit diagram of a power clutch assembly for agricultural machinery according to the present invention.
Figure 5 is a cross-sectional view taken along line AA of Figure 2.
Figure 6 is a cross-sectional view taken along line BB in Figure 2.
Figure 7 is an example of a state in which the power clutch assembly for agricultural machinery according to the present invention is applied to one side of the clutch pack.
Figure 8 is an exemplary operating state of the flow control module of the power clutch assembly for agricultural machinery according to the present invention.
Figure 9 is an exemplary operating state of the speed control module of the power clutch assembly for agricultural machinery according to the present invention.
Figure 10 is a cylinder stroke graph in the maximum loosening (a) and maximum tightening (b) states of the valve variable adjustment screw of the speed control module of the power clutch assembly for agricultural machinery according to the present invention.

Hereinafter, the structure and operation of the power clutch assembly for agricultural machinery and its operating method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of parts that can be easily implemented by those skilled in the art may be omitted.

Figure 1 is a perspective view of a power clutch assembly for agricultural machinery according to the present invention, Figure 2 is a front view of the power clutch assembly for agricultural machinery according to the present invention, Figure 3 is a side view of the power clutch assembly for agricultural machinery according to the present invention, and Figure 4 is a front view of the power clutch assembly for agricultural machinery according to the present invention. A schematic hydraulic circuit diagram of the power clutch assembly for agricultural machinery according to the present invention, Figure 5 is a cross-sectional view taken along line A-A of Figure 2, Figure 6 is a cross-sectional view taken along line B-B of Figure 2, and Figure 7 is a power for agricultural machinery according to the present invention. Figure 8 is an example of the operating state of the flow control module of the power clutch assembly for agricultural machinery according to the present invention, and Figure 9 is an illustration of the operating state of the power clutch assembly for agricultural machinery according to the present invention. Figure 10 is an example of the operating state of the module, showing a cylinder stroke graph in the maximum loosening (a) and maximum tightening (b) states of the valve variable adjustment screw of the speed control module of the power clutch assembly for agricultural machinery according to the present invention. .

The power clutch assembly for agricultural machinery and its operating method to which the technology of the present invention is applied is a power clutch that hydraulically controls the clutch plate of a manual transmission of agricultural machinery, providing control by button operation and smooth operating force during starting and gear shifting to the driver. Please note that this is about technology that minimizes transmitted shock.

For this purpose, the power clutch assembly for agricultural machinery of the present invention includes a power clutch body 100, a cylinder 120 built into the body 100, a solenoid valve 130, a pressure reducing valve 140, a flow control module 150, It consists of a speed control module 160 and is specifically as follows.

The power clutch body 100 is mounted on one side of the clutch pack 10 of agricultural machinery as schematically shown in FIG. 7, and after pressing the power clutch operation button (not shown) provided on the shift lever and forward/reverse lever, the lever It operates by manipulation and is connected to the fluid supply line (110).

The power clutch body 100 forms a box-shaped casing to house the above components, and is located below the clutch lever 20 on which a load acts to operate the cylinder 120.

The cylinder 120 is mounted on the main body 100 and couples a rod to the clutch lever 20 that interlocks with the clutch plate, and connects the first fluid transfer port 121 and the second fluid transfer port 122. Equipped with

The cylinder 120 is configured to couple the rod of the cylinder 120 to the clutch lever 20 and transmit kinetic energy while moving forward and backward by hydraulic pressure to produce an operation that releases or engages the clutch plate.

On one side of the cylinder 120, a first fluid transfer port 121 is provided so that the fluid supplied through the fluid supply line 110 is transferred to the cylinder 120, and on the other side, a second fluid transfer port 122 is provided. ) and is configured to transfer fluid to the flow control module 150 and speed control module 160, which will be described later.

The solenoid valve 130 is provided to switch the first fluid transfer port 121 and the second fluid transfer port 122 according to a release or engage signal.

The solenoid valve opens the first fluid transfer port 121 and supplies fluid to the cylinder 120, or stops supply and opens the second fluid transfer port 122, depending on the release signal or engage signal input. Configure to implement the opening operation.

The pressure reducing valve 140 is mounted on the first fluid transfer port 121 and is provided to set the pressure of the fluid transferred to the cylinder 120 and transfer kinetic energy to the clutch lever 20.

A flow control module 150 that controls the amount of fluid discharged from the cylinder 120 and a speed control module 160 that controls the stroke of the fluid discharged are mounted on the second fluid transfer port 122 to control the clutch plate. It is configured to control the power transmission speed in the process of engaging.

The flow control module 150 is provided to control the flow rate by absorbing or discharging the fluid transferred from the cylinder 120 by the load of the clutch lever 20.

As shown in Figures 5 and 8, the flow control module 150 largely includes a damper body 151, a damper piston 152, a damper spring 153, and a damper variable adjustment screw 154. do.

The damper body 151 forms a duct structure connected to the second fluid transfer port 122 to allow fluid to enter and exit.

The damper piston 152 is built into one side of the damper body 151 and moves backward while absorbing fluid transferred to the damper body 151 or moves forward by the damper spring 153.

The damper piston 152 receives an engage signal input to the solenoid valve 130 to transfer fluid to the damper body 151 through the second fluid transfer port 122 when the cylinder 120 is lowered. It is equipped to move backward while absorbing fluid by pressure.

The damper spring 153 is built into the other side of the damper body 151 and is in contact with the damper piston 152 to be compressed by fluid pressure or tensioned by its own elasticity.

The damper spring 153 is provided as a compression spring and is configured to advance the damper piston 152 to its original position and discharge fluid by tensile force.

The damper variable adjustment screw 154 is fastened to the other end of the damper body 151 and is interpolated toward the rear of the damper piston 152 to set the forward and backward operating ranges of the damper piston 152.

The damper variable adjustment screw 154 forms a predetermined screw at the rear end and is fastened to the other end of the damper body 151, and the front end protrudes into the inside of the damper body 151 to form a predetermined screw at the rear end of the damper piston 152. Equipped to face.

The damper variable adjustment screw 154 is provided so that the distance entering the interior is adjusted according to the tightened or loosened state, so that the deviation of the load of the different clutch lever 20 is adjusted for each type of agricultural machinery, that is, various types of vehicles, so as to maintain uniformity. It is configured to implement performance.

The speed control module 160 is provided to control the stroke of the fluid by passing and discharging the fluid transferred from the cylinder 120 by the load of the clutch lever 20.

As shown in Figures 6 and 9, the speed control module 160 largely includes a valve body 161, a valve spool 163, a valve spring 166, and a valve variable adjustment screw 167. do.

The valve body 161 forms a normally open valve structure connected to the second fluid transfer port 122 to allow fluid to enter and exit.

The valve body 161 is provided with a second T line 162 penetrating the inner and outer diameters to selectively communicate with the first T line 165 of the valve spool 163, which will be described later.

The valve spool 163 is built into one side of the valve body 161 and moves backwards by the pressure of the fluid transferred to the valve body 161 or moves forward by the valve spring 166, and has an orifice 164 at the core. It is formed and provided to pass the fluid.

The valve spool 163 receives an engage signal from the solenoid valve 130 to transfer fluid to the valve body 161 through the second fluid transfer port 122 when the cylinder 120 is lowered. It is equipped to move backwards by pressure.

An orifice 164 is formed in the valve spool 163 to allow fluid to flow in, and a first T line 165 penetrating from the orifice 164 to the outer diameter is formed.

The first T line 165 and the second T line 162 formed on the valve body 161 are provided to overlap part or the entire section depending on the forward and backward positions of the valve spool 163, thereby reducing the stroke of the fluid. Configure to control.

The valve spring 166 is built into the other side of the valve body 161 and is in contact with the valve spool 163 to be compressed by fluid pressure or tensioned by its own elasticity.

The valve spring 166 is provided as a compression spring to advance the valve spool 163 to its original position by tensile force and to discharge fluid by overlapping the first T line 165 and the second T line 162.

The valve variable adjustment screw 167 is fastened to one end of the valve body 161 and is interpolated toward the rear of the valve spool 163 to set the forward and backward operating ranges of the valve spool 163.

The valve variable adjustment screw 167 forms a predetermined screw at the rear end and is fastened to the other end of the valve body 161, and the tip protrudes into the inside of the valve body 161 to form a predetermined screw at the rear end of the valve spool 163. Equipped to face.

The valve variable adjustment screw 167 is provided so that the distance entering the interior is adjusted according to the tightened or loosened state, so that the deviation of the load of the different clutch lever 20 is adjusted for each type of agricultural machinery, that is, various types of vehicles, to ensure uniformity. It is configured to implement performance.

The operation method of the power clutch assembly for agricultural machinery to which the technology of the present invention configured as described above is applied is as follows. The following description describes the present invention by way of preferred embodiments, so the present invention is not limited by the following examples, and it is natural that various modifications may be made without departing from the scope of the present invention. .

Figure 4 shows a hydraulic circuit diagram of the power clutch assembly for agricultural machinery according to the present invention.

When the release signal (S1) is applied to the solenoid valve 130, the fluid (oil) supplied through the fluid supply line 110 passes through the first fluid transfer port 121 of the solenoid valve 130 and reaches the pressure reducing valve 140. The rod of the cylinder 120 is advanced (elevated) through a set pressure.

The hydraulic energy transmitted in this way is transferred as kinetic energy to the clutch lever 20 to which the rod of the cylinder 120 is coupled, releasing the clutch plate and blocking power transmission of the vehicle, allowing the driver to shift the vehicle.

When the driver shifts the vehicle, an engage signal (S2) is applied to the solenoid valve 130, and the rod of the cylinder 120 moves backward (lowers) due to the load of the clutch lever 20. The fluid in the cylinder 120 part flows to the flow control module 150 and the speed control module 160 through the second fluid transfer port 122 of the solenoid valve 130. At this time, the flow speed of the fluid is controlled by the flow control module 150 and the speed control module 160, and power is transmitted quickly and smoothly when the vehicle clutch engages.

The flow rate and stroke control mechanism by the flow control module 150 and the speed control module 160 controls the half-clutch point (the section where the engine's transmission and the clutch begin to connect) and power in order to minimize the shock transmitted to the driver. This is done so that the point at which it is fully delivered can be controlled through hydraulic pressure. Broadly speaking, it is a two-stage flow control method, and can be subdivided into a total of three stages.

The total control volume of the power clutch assembly for agricultural machinery of the present invention is about 18 cc (100%), and the total stroke of the cylinder 120 is about 26 mm (100%). If this is divided into three stages of control, the first stage is flow rate 8cc (44%), downward stroke △10~12mm (38.5% ~ 46.2%), and the second stage is flow rate 1cc (5.5%), downward stroke △ 2~3mm (7.7% ~ 11.5%), and the third stage operates with a flow rate of 9cc (50%) and a downward stroke of △11~14mm (42.3% ~ 53.8%).

In the first step, the time to reach the half-clutch section is minimized through flow rate control by the flow control module 150.

The flow control module 150 implements a function to quickly reach the half-clutch section where the clutch begins to engage, and about 38 to 45.6% of the stroke of the cylinder 120 is not an actual clutch control section. Therefore, the overall clutch engage time is reduced by shortening the control time of this section to a minimum.

Since the flow rate to be controlled by the flow control module 150 varies depending on the clutch of each vehicle, the damping volume is set using the damper variable adjustment screw 154 to optimally set it.

When flow flows into the damper body 151, the damper piston 152 compresses the damper spring 153 and retracts to control the excess flow of the cylinder 120.

The excess flow rate that requires control is controlled by limiting the movement range of the damper piston (152) using the damper variable adjustment screw (154) by the set damping volume.

When control is completed, the damper spring 153 is tensioned and the damper piston 152 moves forward and returns to its original position.

In the second stage, the speed control module 160 controls the clutch from half-clutch to 100% engagement.

The second stage control operates after the first stage control by the flow control module 150. This is because the damper piston 152 of the flow control module 150 is set to operate at a lower pressure than the valve spool 163 of the speed control module 160.

When the first stage control is completed, the fluid passes through the orifice 164 of the valve spool 163. The valve spool 163 moves backward due to the differential pressure generated at this time, and the passing area of the 1st T line 165 and the 2nd T line 162 is controlled.

The opening areas of the first T line 165 and the second T line 162 are inversely proportional to the moving distance of the valve spool 163, and the moving distance of the valve spool 163 is limited by the valve variable adjustment screw 167.

When control is completed, the valve spool 163 is returned to its original position by the valve spring 166 and the residual pressure remaining in the cylinder 120 is quickly relieved.

The third stage control is time controlled by the valve variable adjustment screw 167 of the speed control module 160.

As shown in FIG. 9, when the valve spool 163 moves backward, the overlapping section (opening amount of the T line) between the 1st T line 165 of the valve spool 163 and the 2nd T line 162 of the valve body 161 is As it decreases, the amount of fluid discharged is controlled. Due to this action, the descending speed of the cylinder 120 is slowed, and the driver can drive smoothly through smooth power transmission. At this time, the amount of fluid flowing out of the first T line 165 and the second T line 162 is about 9 cc (50%), and the downward stroke of the cylinder 120 is about △11 to 14 mm (42.3% to 53.8%). That's about it.

Figure 10 (a) is a graph showing the movement diagram of the cylinder 120 when the valve variable adjustment screw 167 of the speed control module 160 is loosened to the maximum (maximum control time). (b) is a graph showing the movement diagram of the cylinder 120 when the valve variable adjustment screw 167 is tightened to the maximum (minimum control time). Loosening the valve adjustment screw (167) increases the engagement time and allows smooth shifting, but the duration of the half-clutch state is relatively long. When the valve variable adjustment screw (167) is tightened, the engagement time is reduced, the movement of the clutch is relatively felt, and the duration of the half-clutch state is short. This part can be adjusted by the driver to suit his or her own preferences. In addition, this adjustment function can also perform the function of compensating for shift delay due to oil viscosity when cold.

The power clutch assembly for agricultural machinery and its operating method according to the present invention as described above constitutes a power clutch assembly for agricultural machinery capable of controlling the flow rate and stroke of the fluid during the operation of the clutch plate when the agricultural machinery driver shifts the vehicle, and the shift lever and After pressing the power clutch operation button mounted on the forward/reverse lever, the lever is operated to control the clutch and transmit/block power.

Therefore, the present invention reduces operator fatigue by enabling more detailed and stable control compared to the conventional clutch pedal operation method by using a hydraulic cylinder and hydraulic valve, and reduces sudden operating force in the process of releasing/engaging the clutch plate to the flywheel. This has the effect of eliminating the problem of the engine turning off or shaking and providing a smoother starting and shifting feel by minimizing the shock transmitted to the driver.

10: Clutch pack 20: Clutch lever
100: Power clutch body 110: Fluid supply line
120: Cylinder 121: First fluid transfer port
122: Second fluid transfer port 130: Solenoid valve
140: pressure reducing valve 150: flow control module
151: Damper body 152: Damper piston
153: Damper spring 154: Damper variable adjustment screw
160: Speed control module 161: Valve body
162: 2nd T line 163: valve spool
164: Orifice 165: 1st T line
166: valve spring 167: valve variable adjustment screw

Claims (5)

A power clutch body (100) mounted on one side of the clutch pack (10) of agricultural machinery, operated by an operation button mounted on the shift lever and forward/reverse lever, and connected to the fluid supply line (110),
A cylinder 120 mounted on the main body 100 and coupled with a rod to the clutch lever 20 interlocking with the clutch plate, and connected to the first fluid transfer port 121 and the second fluid transfer port 122. and,
A solenoid valve 130 provided to switch the first fluid transfer port 121 and the second fluid transfer port 122 according to a release or engage signal;
It includes a pressure reducing valve 140 mounted on the first fluid transfer port 121 and configured to set the pressure of the fluid transferred to the cylinder 120 and transfer kinetic energy to the clutch lever 20,
On the second fluid transfer port 122,
A flow control module 150 provided to control the flow rate by absorbing or discharging fluid transferred from the cylinder 120 by the load of the clutch lever 20, and
Power is transmitted in the process of engaging the clutch plate by installing a speed control module 160 that controls the stroke of the fluid by passing and discharging the fluid transferred from the cylinder 120 by the load of the clutch lever 20. Equipped to control the speed,
The flow control module 150,
A damper body 151 that forms a duct structure connected to the second fluid transfer port 122 to allow fluid to enter and exit,
A damper piston (152) built into one side of the damper body (151) and provided to move backward or forward by a damper spring (153) while absorbing fluid transferred to the damper body (151),
A damper spring (153) is built into the other side of the damper body (151) and is in contact with the damper piston (152) to be compressed by fluid pressure or stretched by its own elasticity,
Including a damper variable adjustment screw 154 fastened to the other end of the damper body 151 and interpolated toward the rear of the damper piston 152 to set the forward and backward operating ranges of the damper piston 152. , A power clutch assembly for agricultural machinery, characterized in that it is configured to achieve uniform performance by adjusting the deviation of the load of the different clutch levers 20 for various types of vehicles. delete According to claim 1,
The speed control module 160 is,
A valve body 161 configured to allow fluid to enter and exit by forming a normally open valve structure connected to the second fluid transfer port 122,
It is built into one side of the valve body 161 and moves backwards by the pressure of the fluid transferred to the valve body 161 or forwards by the valve spring 166, and an orifice 164 is formed in the core to allow the fluid to pass through. A valve spool (163),
It includes a valve spring 166 built into the other side of the valve body 161 and in contact with the valve spool 163 to be compressed by fluid pressure or tensioned by its own elasticity,
Including a valve variable adjustment screw 167 fastened to one end of the valve body 161 and interpolated toward the rear of the valve spool 163 to set the forward and backward operating ranges of the valve spool 163. , A power clutch assembly for agricultural machinery, characterized in that it is configured to achieve uniform performance by adjusting the deviation of the load of the different clutch levers 20 for various types of vehicles. According to claim 3,
A first T line 165 passing from the orifice 164 to the outer diameter is formed in the valve spool 163,
A second T line 162 passing through the inner and outer diameters is formed in the valve body 161,
Agricultural machinery, characterized in that the first T line 165 and the second T line 162 are provided to overlap part or the entire section depending on the forward and backward positions of the valve spool 163 to control the stroke of the fluid. For power clutch assembly. In the method of operating a power clutch assembly for agricultural machinery according to any one of claims 1, 3, and 4,
A first step of adjusting the half-clutch section arrival time through flow control by the flow control module 150,
A second step to adjust the control speed from the half-clutch point to the engage of the clutch through fluid stroke control by the speed control module 160,
It includes a third step in which the control time of the second step is adjusted by the valve variable adjustment screw 167 of the speed control module 160,
In the first step,
When the flow rate flows into the damper body 151 of the flow control module 150, the damper piston 152 retracts while compressing the damper spring 153 to control the excess flow rate of the cylinder 120,
The flow rate is controlled by the set damping volume by limiting the movement range of the damper piston (152) using the damper variable adjustment screw (154) of the flow control module (150),
When control is completed, the damper piston 152 is returned to its original position by the damper spring 153,
In the second step,
When fluid passes through the orifice 164 of the valve spool 163 of the speed control module 160, the valve spool 163 moves due to differential pressure and the passing area of the 1st T line 165 and the 2nd T line 162 is expanded. Control the lowering speed of the cylinder 120 by adjusting,
Limit the moving distance of the valve spool (163) to the set range using the valve variable adjustment screw (167) of the speed control module (160),
When control is completed, the valve spool 163 is returned to its original position by the valve spring 166.
In the third step,
Loosen the valve variable adjustment screw (167) of the speed control module (160) to delay the clutch engagement time and maintain the semi-clutch state for a long time, or tighten the valve variable adjustment screw (167) to shorten the clutch engagement time and maintain the semi-clutch state for a long time. A method of operating a power clutch assembly for agricultural machinery, characterized in that the state is controlled to last briefly.

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