KR20020092525A - regulating machine of dynamic caterpillar tension of load compensation style for combat of caterpillar vehicles - Google Patents

Abstract

PURPOSE: A load-compensation dynamic track adjuster of a caterpillar combat vehicle is provided to minimize the power for actively controlling the track tension depending on the state of the road surface and operation by controlling the preliminary tension and to minimize the loss of power in controlling a tension adjusting cylinder via a servo-valve. CONSTITUTION: A pressure reducing valve(31) and a solenoid valves(32) are connected to a common rail(30) supplying the pulsating oil-hydraulic pressure to maintain a uniform preliminary tension by simultaneously supplying hydraulic oil to chambers(a,a') in oil-hydraulic cylinders(20,40). Servo valves(25,45) are operated by the electrical signal inputted from an external electronic control unit to control the tension of chambers(b,b',c,c') of the oil-hydraulic cylinders and to supply the hydraulic oil of an oil-hydraulic pump. Check valves(21,41) discharge the hydraulic oil supplied to the chambers(b,b') of the hydraulic oil by opening an internal flow path.

Description

Regulating machine of dynamic caterpillar tension of load compensation style for combat of caterpillar vehicles

The present invention relates to a load compensating type dynamic track tension control device for orbital combat vehicles, and more specifically, by connecting the accumulator, the pressure reducing valve and the solenoid to the chamber of the plurality of inlet cylinders, the preliminary tension can be adjusted and the tension control server The present invention relates to a load compensating dynamic track tension control device for a track combat vehicle that can be controlled through a valve to actively control track tension according to road conditions and driving conditions, thereby minimizing required power.

Track combat vehicles are getting better and the direction of their development is becoming more and more similar to that of ordinary vehicles.

In order to ensure the driving safety of track combat vehicles mainly operated in field, a certain level of track tension must be maintained, and since the magnitude of tension is closely related to the fuel economy of vehicles and the in-water life of suspension components, Tension is necessary. Therefore, a device has been developed for stably maintaining track tension of track combat vehicles.

Combat vehicles often employ caterpillars as a means of movement to maintain mobility even in rough lands, wetlands, and incisions. Tracked combat vehicles need to maintain a certain level of track tension in order to ensure that the track adheres to the body regardless of road conditions in various driving conditions such as flat and rugged ramps.

An example of one orbital tension control device will be described with reference to FIG. 1.

The track tension control device 1 is coupled to a flow wheel 3 installed at the upper front of the vehicle to support the track 2 of the combat vehicle, and is rotatably mounted to the support spindles 4 fixed to the vehicle body. (5) and a hydraulic cylinder connected to the arm (5), that is, a TAC track adjusting cylinder.

At the end of the flow wheel arm 5, the flow wheel spindle 6 is formed to support the rotation of the flow wheel 3, and at the lower end, the ram 9 of the hydraulic cylinder 8 is ball socketed by a bearing connection 7. Are combined. The hydraulic cylinder 8 is pivotally mounted to the vehicle body by a pivot shaft 10 provided on the side opposite to the ram 9.

Therefore, the track tension adjusting device 1 is adapted to apply the tension of the appropriate value defined in the stationary state to the track 2 in order to prevent the track from deviating when the combat vehicle starts.

That is, when the hydraulic cylinder 8 is pivoted about the pivot shaft 10 and the ram 9 is advanced by the hydraulic pressure therein, the middle part of the arm 5 is rotated about the spindle as the flow wheel arm 5 rotates about the spindle. The flow wheel (3) mounted on the move to the front to apply a certain level of tension to the track (2) winding the flow ring (3).

The track tension control device 1 is to control the hydraulic pressure by the hydraulic circuit 11 as shown in FIG. When the solenoid valve 12 is turned on for the first time, a pressure of about 1500 to 2000 psi generated by the hydraulic pump (not shown) and transmitted to the hydraulic circuit 11 through the supply line 13 is applied to the hydraulic cylinder 8. Pressure is maintained at an appropriate level by the check valve (14). As the piston in the cylinder 8 advances by this pressure, the ram 9 connected to the piston presses the flow wheel arm connected to the flow wheel 3.

The tension of the track is set to a prescribed value through the forward and backward movement of the flow wheel 3, and the solenoid valve 15 is kept in the off state. At this time, excessive tension is applied due to a sudden change in driving conditions when the tank is started, and in contrast, a relief valve between the hydraulic cylinder inlet line and the feedback line 17 is prepared in case a hydraulic pressure, for example, 5000 to 10000 psi is generated. (16) is provided.

In addition, when the track tension is to be reduced, the solenoid valve 12 is turned off and closed by the crew operation, and the solenoid valve 15 is turned on and opened. Therefore, the hydraulic pressure supplied from the hydraulic line acts on the check valve 14 through the pilot line 18 via the line to open the check valve 14 and thus the hydraulic pressure of the hydraulic cylinder passes through the check valve 14. It is discharged through the solenoid valve 12 and the return line (17).

In this way, the track tension control device generates tension in the track by the hydraulic pump of the tank compared to the track tension control device, so the track is simply operated by the solenoid valve 12 (15) on / off switch of the crew member inside the tank. It has excellent operability to adjust tension.

Since the tension controller of the track combat vehicle must perform the track tension control work only when the tank is stopped, the track deviation and the steering performance deterioration due to the track loosening and sag shape that occur at the start of the tank, and the geometric deformation of the suspension system. There was no fundamental countermeasure.

The present invention is to solve such a conventional problem, the object of the accumulator in the chamber of the two-stage hydraulic cylinder in order to minimize the power required to actively adjust the track tension in accordance with the road surface and operating conditions of the main body The pre-tension can be controlled by connecting the pressure reducing valve and solenoid, and minimizing the power loss when controlling the tension control cylinder through the server valve.

1 is a block diagram of a general conventional track tension control device.

2 is a hydraulic circuit diagram of a conventional track tension control device.

3 is a hydraulic circuit diagram for a load compensation dynamic track tension control according to an embodiment of the present invention.

Code descriptions for the main parts of the drawings

1; orbital tension control device 2; orbit

3; flow wheel 4; support spindle

5; fluid wheel arm 6; fluid wheel spindle

7.bearing connection 8,20,40; hydraulic cylinder

9; Ram 10; Pivot Shaft

11,100 Hydraulic circuits 12, 15, 23, 32, 43 Solenoid valve

13; supply lines 14, 21, 24, 41, 44; check valve

16; relief valve 17; return line

18; pilot line 22, 42; pressure reducing valve

25, 45; servo valve ECU; electronic control unit

a, a ', b, b', c, c '; chamber

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings in order to describe in detail enough to enable those skilled in the art to easily carry out the present invention. . Other objects, features, and operational advantages, including the object, operation, and effect of the present invention will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred examples to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only to this embodiment. However, various changes and modifications are possible within the scope without departing from the technical spirit of the present invention, as well as other equivalent embodiments.

3 is a hydraulic circuit diagram for a load compensation dynamic track tension control according to an embodiment of the present invention.

The present invention relates to a hydraulic circuit that can adjust the track tension, as shown in Figure 3 the track tension control device is similar to the conventional track tension control device while applying the hydraulic pressure of the hydraulic pump (not shown) to the inlet cylinder Hydraulic circuit 100 is connected to adjust the tension of the track connected to the cylinder.

As shown in FIG. 3, the hydraulic circuit 100 includes a plurality of cylinders 20 and 40 connected in parallel to the left and right sides, respectively, and the hydraulic cylinders 20 and 40 and the chamber a. a ') is provided with hydraulic oil at the same time to provide a pulsating hydraulic pressure to maintain a constant tension, and the pre-tension in the interior of the hydraulic cylinder (20, 40) connected to the accumulator (30) The pressure reducing valve 31 and the solenoid valve 32 are connected side by side so that it can be adjusted has a configuration that is connected.

Is connected to the chamber (b) (b ') side of the hydraulic cylinder 20, 40 is operated by an electrical signal input from the external electronic control unit (ECU) to provide the hydraulic oil of the hydraulic pump Servo valves 25 and 45 and the hydraulic oil provided from the servo valves 25 and 45 allow the hydraulic oil supplied to the chambers b and b 'of the hydraulic cylinders 20 and 40 to be discharged. A check valve 21 and 41 for opening and discharging the internal flow path and a check valve connected to the chamber c of the hydraulic cylinder 20 and 40 to prevent cavitation inside the cylinder ( 24) and 44, and are connected between the check valves 21 and 41 and the check valves 24 and 44 so as to prevent breakage by external shock transfer of the hydraulic cylinders 20 and 40. Tension connected between the pressure reducing valves 22 and 42 and the check valves 21 and 41 and the check valves 24 and 44 to remove the tension held in the hydraulic cylinders 20 and 40. Solenoid Valve for Removal (23) and (43) are connected.

Referring to the effects of the present invention configured as described above in detail.

The present invention relates to a hydraulic circuit that can adjust the orbital tension, as shown in Figure 3 the hydraulic oil of the hydraulic pump in the chamber (a) (a ') of the hydraulic cylinder (20, 40) to the solenoid valve 32 By way of the accumulator (30) and the pressure reducing valve (31) to adjust the magnitude of the pre-tension according to the driving conditions of the vehicle, a higher tension is required during driving and the amount of hydraulic power required to push the cylinder further It can be reduced.

In addition, the chamber (a) (a ') of the hydraulic cylinder (20, 40) provides a pulsating hydraulic pressure of the accumulator (30) to maintain a fluid elasticity inside the inlet cylinder (20, 40) orbit It absorbs the pulsation of tension and the vibration of the track.

The solenoid valve 32 performs a function of maintaining the pretension of the track in the same situation as when the engine is a hydraulic power source is stopped, in the case of the maintenance of the hydraulic cylinder, such as when the pre-tension is removed to operate the hydraulic cylinder (20) 40 Allow the hydraulic pressure in the chambers (a) (a ') to escape to the return line (17).

On the other hand, the setting of the dynamic track tension required during the driving of the vehicle is performed as the servovalve 25, 45 and the check valve 21, 41 operate in conjunction. When a tension higher than the current tension is to be set, the hydraulic pressure is supplied to the chambers b and b 'of the hydraulic cylinders 20 and 40 by the servo valves 25 and 45 by the command of the electronic control unit (ECU). When the hydraulic cylinders 20 and 40 are expanded and the tension is to be reduced, the valves 21 and 41 are opened by the servo valves 25 and 45, and the hydraulic cylinders 20 are caused by the orbital tension. The hydraulic pressure in the chambers (b) and (b ') is discharged to the return line (17) via the check valves (21) and (41) and the servo valves (25) and (45) by the force of the pressure 40). Position control is performed.

At this time, the relief valves 22 and 42, which are relief valves, prevent damage to the cylinder due to external shocks, and the check valves 24 and 44 cavitation inside the cylinder when the hydraulic cylinders 20 and 40 are positioned. In order to prevent), the hydraulic pressure of the chambers c and c 'is removed. In addition, the tension removal of the hydraulic cylinders 20 and 40 is to remove the tension while the solenoid valve 23, 43 operates by the electrical signal of the electronic control unit (ECU).

Such dynamic track tension control device is maintained in conjunction with the two-stage cylinder, the accumulator (30) and the pressure reducing valves (31), (22) and (42) to maintain the pre-tension and increase the tension while driving the hydraulic pump Hydraulic power is used (i.e., the hydraulic oil flows into the cylinder chamber (b) (b ') via the servo valves 25, 45 and the check valves 21, 41 in conjunction with the electronic control unit (ECU)). When the cylinder expands) and the tension is reduced, the tension is controlled by the external force of the cylinder, so that the power utilization efficiency of the hydraulic system is high.

In the present invention acting as described above, if the track tension is actively adjusted according to the condition of the road surface and operation conditions, the pretension can be adjusted by connecting the accumulator, the pressure reducing valve and the solenoid valve to the chamber of the two-stage hydraulic cylinder, The hydraulic power is used only to increase the tension, and the external force is moved to reduce the tension, thereby minimizing the required power when adjusting the dynamic tension using the servovalve.

Claims (2)

In an orbital combat vehicle equipped with a hydraulic cylinder (20, 40) for advancing or reversing a ram to allow the orbital tension to be adjusted from the hydraulic oil introduced into the hydraulic pump, the hydraulic cylinder (20, 40) A pressure reducing valve 31 and a solenoid valve 32 connected to an accumulator 30 that provides pulsating hydraulic pressure to simultaneously supply hydraulic oil to the chambers (a) (a ') to maintain a predetermined reserve tension; Hydraulic pressure is controlled by an electric signal input from an external electronic control unit (ECU) to adjust the tension of the chambers b, b ', c, and c' of the hydraulic cylinders 20 and 40. Servo valves 25 and 45 to allow the hydraulic oil of the pump to be provided, and the hydraulic oils provided by the servo valves 25 and 45 are chambers b and b 'of the hydraulic cylinders 20 and 40. The lower side of the track fighting vehicle formed by connecting the check valves 21 and 41 for opening and discharging the internal flow path so as to discharge the hydraulic oil supplied thereto. Compensating dynamic track tensioning device. The hydraulic valve (20) and the hydraulic valve (20) and (40) are connected to the chamber (c) so as to prevent cavitation inside the cylinder (24) and (44), and the valve (21) ( A pressure reducing valve (22) (42) connected between the valve (41) and the check valve (24) (44) to prevent breakage by external shock transmission of the hydraulic cylinders (20) and (40); 21) (41) and the check valve (24) (44) is further connected to the tension removing solenoid valves (23) (43) to remove the tension held in the hydraulic cylinder (20) (40) Load compensating dynamic track tension control device made of track combat vehicle.