KR20020007686A - a belt tension adjuster of vehicls - Google Patents

Abstract

PURPOSE: A tension adjustor of a belt for a vehicle is provided to operate normally by compensating tension automatically and accurately according to lowering of belt tension and by displaying the belt replacement time, and to prevent accidents by replacing the belt timely. CONSTITUTION: A piston rod(10) of a hydraulic cylinder(8) is contacted to the lower end of a shaft(7) having an idle pulley(6), and a tachometer(16) is installed in a fixing body(5). An engine control unit(17) receives information on RPM(Revolution Per Minute) of the idle pulley and a crank pulley from the tachometer and an engine RPM detecting sensor, and detects the tension of the belt by comparing information. The hydraulic cylinder is operated with opening a valve(15), and the tension of the belt is adjusted automatically with pushing the idle pulley up. A piston rod detecting sensor(18) is installed in the upper part of the hydraulic cylinder, and a warning light(19) is turned on in detecting the rising piston rod by adjusting the tension repeatedly to alarm the belt replacement time. Convenience is improved with controlling the tension of the belt automatically, and parts are operated actively with the belt. Accidents are prevented with replacing the belt timely.

Description

Belt tension adjuster of vehicls

The present invention relates to a belt tensioning device of an automobile, in particular, the belt drive system components can be smoothly operated by keeping the tension of the belt automatically and constantly at all times, and it is also possible to know the time to replace the belt in a timely manner as belt loosening The present invention relates to a belt tension adjusting device for a vehicle, which can prevent accidents caused by accident.

In general, a vehicle has a number of devices that operate using the power of the engine, such as an alternator, an air compressor, a power pump and a water pump, and these are belt drive system components that are operated by receiving engine power by a belt.

Therefore, when the belt is loosened due to wear, power is not properly transmitted to the belt drive system parts, so engine power is lost, and the parts are not normally operated, which causes a decrease in engine output and increases the exhaust gas. Generate.

In addition, like the belt drive system components, the camshaft of the engine is rotated by receiving power from the belt. Also, when the tension of the belt falls, the camshaft is not rotated at a speed, and thus the stroke performance is not properly performed. Degrades, causing additional problems.

Therefore, it is necessary to keep the tension of the belt at a constant level at all times. In the past, the belt tension regulator 4 as shown in FIG. 1 was used to be attached to the engine.

FIG. 1 is a view illustrating the driving force of the crank pulley 1 of the engine being transmitted to the camshaft pulley 2, and the tension regulator 4 is applied to the belt 3 caught on the crank pulley 1 and the camshaft pulley 2. ), The idle pulley 106 is pushed from the inside to the outside to keep the belt 3 taut.

As shown in FIG. 2, the tension adjuster 4 has an idle pulley 106 installed on the fixing bracket 105 mounted on the engine body via the shaft 107, and perpendicularly to the fixing bracket 105. At the upper end of the bent tension jaw information 108 is fitted, the body of the tension jaw information 108 is screwed to the shaft 107 of the idle pulley 106.

Accordingly, when the tension jaw information 108 is turned, the shaft 107 is moved on the body of the tension jaw 108 according to the turning direction, and the idle pulley 106 mounted on the shaft 107 is also linked at the same time. The tension of the belt 3 in contact with the idle pulley 106 can be adjusted.

That is, the user presses the belt 3 by hand and senses the degree of tension thereof. When the belt 3 is loosened, the idle pulley 106 rotates the idle pulley 106 so that the belt 3 is moved from the inside to the outside. The pressure of the belt 3 may be adjusted to a normal state by pushing the rod to move the vehicle.

However, the tension adjustment of the belt as described above is checked by the user by hand to determine the degree to which the belt tension is dropped by the tension, the tension adjustment information 108 until the correction of the reduced tension also feels appropriate by the sense Since the tension adjustment is not made correctly, as it is made by turning, there is a problem that the work is cumbersome because it is performed manually every time during the inspection.

In addition, since it is impossible to know the timing of belt replacement in a timely manner, after correcting the belt tension several times, in spite of the aging and replacement of the belt, it is necessary to adjust the belt tension again and then use the belt tension to loosen or break the pulley. There could be another problem.

Therefore, the present invention is invented to solve the above problems, the tension compensation is automatically made correctly according to the degree of tension of the belt falls, the warning display to replace the belt when the degree of tension compensation is above a certain level It is possible to maintain proper belt tension at all times so that the belt driven parts can be operated normally and the belt can be replaced in a timely manner, thereby providing a belt tension adjusting device of the car that can prevent accidents in advance. Has its purpose.

1 is a side view of a vehicle engine showing a belt mounted state,

Figure 2 is a side view of the belt tensioner according to the prior art,

3 is a block diagram of a belt tension adjusting device for a vehicle according to the present invention;

Figure 4 is a plan view of the cylinder rod of the hydraulic cylinder applied to the present invention.

Explanation of symbols on the main parts of the drawing

1: crank pulley, 2: camshaft pulley,

3: belt, 4: tension regulator,

5: fixed body, 6: idle pulley,

7: shaft, 8: hydraulic cylinder,

9: piston, 10: piston rod,

11: leaf spring, 12: lock pin,

13: hanging jaw, 14: oil pump,

15 valve, 16: tachometer,

17: engine control unit, 18: piston rod detection sensor,

19: Warning light.

The present invention for achieving the above object, the shaft is provided in the fixed body fixed to the engine body, the idle pulley is installed on the outer end of the fixed body of the shaft, the hydraulic cylinder is installed on the lower portion of the fixed body The piston rod and the shaft of the hydraulic cylinder are in contact with each other, a tachometer is installed on the fixed body to detect the rotational speed of the idle pulley and transmit it to the engine control unit, the engine control unit is installed engine speed By comparing the rotation speed of the crank pulley applied from the sensor and the rotation speed of the idle pulley, it is determined whether the rotation of the crank pulley is being transmitted normally, otherwise it is determined that the tension compensation of the belt is connected to the hydraulic cylinder Opening the valve supplies oil from the oil pump to the hydraulic cylinder, It is designed to push up the shaft, and a piston rod detection sensor is provided on the upper part of the hydraulic cylinder. When the piston rod contacts the sensor, it is determined that tension correction is no longer possible. It is made of a structure that can inform the user to replace the belt.

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

3 is a configuration of the belt tensioning device of the vehicle according to the present invention, the present invention is fixed to the cylindrical fixed body (5) to the engine body, the fixed body (5) in the ?? shaft (7) The inner side of the fixed body (5) has a long vertical hole is formed so that the upper horizontal portion of the shaft (7) can be moved out of the state of being pulled out, the end of the horizontal portion While the pulley 6 is rotatably mounted, the lower end of the fixed body 5 is equipped with a hydraulic cylinder 8 having a piston 9 and a piston rod 10 connected thereto, and the hydraulic cylinder 8 The upper end of the piston rod (10) of the squeezed out to the lower portion of the fixed body (5) is in contact with the lower end of the shaft (7) located inside the hydraulic cylinder (8), the hydraulic cylinder (8) Of the valve 15 which is connected to the pump 14 and opened / closed by the engine control unit 17. Operation is supplied with hydraulic pressure, the engine control unit 17 is mounted on the top of the fixed body (5), the tachometer (16) and the hydraulic cylinder (8) for detecting the rotational speed of the idle pulley (6) The piston rod detection sensor 18 and the warning light 19 installed in the cabin is made of a structure connected.

In addition, the upper side of the piston rod 10, as shown in Figure 4, the lock pin 12 is pushed into the inner side of the piston rod 10 is pushed into the inner side of the piston rod 10 is pushed out again It is installed, and the upper inner peripheral surface of the hydraulic cylinder (8) is made of a structure in which a plurality of locking jaws 13 in which the lock pin 12 is caught in succession.

In addition, the formation range of the latching jaws 13 is a range in which the piston rod 10 pushes the shaft 7 and pushes the belt to the idle pulley 6 so that the tension can be adjusted. The tension adjustment range is limited because the belt cannot be tightened by pushing the shaft 7 indefinitely, and the belt must be replaced after the tension correction has been made to some extent. The tension adjustment range is limited to the top of the tension adjustment range. 13 is formed, the piston rod sensor 18 is installed at this position.

The operation of the present invention will now be described.

The engine control unit 17 is always supplied with the rotational speed of the idle pulley 6 and the crank pulley 1 which is the driving pulley through the tachometer 16 and the engine speed sensor installed in advance. By comparison, it is judged whether the rotation of the crank pulley 1 is normally transmitted to the idle pulley 6 (the engine control unit inputs the rotation speed of the idle pulley to the rotation speed of the crank pulley when the belt tension is normal, so that both rotations are performed). If the ratio is different from the input value, it is determined that the belt tension correction is necessary.) If the rotational force transmission of the crank pulley 1 is not performed properly, the belt tension correction is necessary and the valve 15 is assumed. Is opened to supply the oil of the oil pump 14 to the hydraulic cylinder (8).

When the piston 9 of the hydraulic cylinder 8 is pushed upward by being pressed by the oil pump 14, the piston rod 10 is pushed upward while pushing the shaft 7 which is in contact with the shaft ( The idle pulley (6) installed in 7) pushes the belt, the tension compensation of the loose belt is made.

Therefore, the proper adjustment of the belt tension is always performed automatically so that the user's convenience is improved, and the parts driven by the belt operate smoothly, thereby additionally improving the engine performance and reducing the exhaust gas. Will be able to.

Meanwhile, as described above, the lock pin 12 and the locking jaw 13 are formed in the piston rod 10 and the hydraulic cylinder 8, respectively, and the outer circumferential surface of the lock pin 12 and the locking jaw 13 are formed. The inner circumferential surface thereof is formed with a slope corresponding to each other and the bottom surface of the lock pin 12 and the upper surface of the locking jaw 13 is formed in a plane, the piston rod 10 can move upwards but can move downwards It is not intended.

Then, when the tension of the belt is lowered again, the piston rod 10 is pushed upward as described above, and the process of adjusting the belt tension to normal is repeated, and this process is repeated repeatedly so that the piston rod 10 is connected to the piston. Upon contact with the rod sensor 18, the piston rod sensor 18 sends this detection signal to the engine control unit 17, which receives the signal and further adjusts the belt by tensioning the belt. It is determined that it cannot be used and lights up the warning light 19 installed in the vehicle to inform the driver that it is time to replace the belt.

Therefore, the driver can change the belt in a timely manner, and it is possible to prevent the occurrence of an accident due to the belt loosening or breaking.

As described above, according to the present invention, by comparing the rotation speed of the crank pulley and the camshaft pulley, it is possible to accurately determine the tension reduction state of the belt, and since the engine control unit opens the valve to operate the hydraulic cylinder, the tension is adjusted. The belt tension is automatically adjusted, and after a certain amount of tension adjustment, a warning lamp lights up to inform the timing of belt replacement, eliminating the inconvenience of the user checking and adjusting the belt tension separately. Is executed immediately every time the belt is loosened, and the parts driven by the belt can always be operated smoothly, and the belt can be replaced in a timely manner to prevent accidents caused by loosening or breaking of the belt. There is.

Claims (2)

The fixed body 5 is fixed to the engine body, and the shaft 7 is built in the fixed body 5, and a long vertical hole is formed in the side of the fixed body 5 so that the outside of the fixed body 5 is fixed. The upper horizontal portion of the shaft (7) drawn out can be moved up and down, and the idle pulley (6) for pushing the belt to the end of the horizontal portion is rotatably mounted, the lower end of the fixed body (5) piston (9) and a hydraulic cylinder (8) equipped with a piston rod (10) is mounted, the upper end of the piston rod (10) of the hydraulic cylinder (8) is in contact with the lower end of the shaft (7), The hydraulic cylinder 8 is connected to the oil pump 14 and is supplied with hydraulic pressure by the operation of the valve 15 opened and closed by the engine control unit 17. The engine control unit 17 is connected to the fixed body 5. Tachometer 16 to detect the rotation speed of the idle pulley 6, the engine speed sensor and the hydraulic cylinder mounted on the top Piston rod detection sensor 18 mounted on the upper portion of the (8) and the warning light (19) installed in the cabin is connected, the engine control unit 17 compares the rotational speed of the crank pulley with the rotational speed of the idle pulley When the tension adjustment is necessary, the belt of the vehicle, which is programmed to adjust the tension by opening the valve 15 and to light the warning light 19 when the piston rod detection sensor 18 contacts the piston rod 10. Tension adjusting device. The lock pin (12) of claim 1, wherein the lock pin (12) is provided at the upper end of the piston rod (10) to be pushed into the center of the piston rod (10) and pushed out. Belt tension adjusting device of the vehicle, characterized in that the engaging jaw (13) is caught on the upper outer peripheral surface of the hydraulic cylinder (8).