KR102067673B1 - Stopper device for replacement of CVVT center bolts for automobiles - Google Patents

Abstract

The present invention relates to a stopper device for exchanging a CVVT center bolt for automobiles and, more specifically, to a stopper device for exchanging a CVVT center bolt for automobiles wherein a fixing means fixed to a timing chain cover is newly developed so as to simply replace a CVVT center bolt for automobiles.

Description

Stopper device for replacement of CVVT center bolts for automobiles

The present invention relates to a stopper device for replacing a CVVT center bolt for automobiles, and more particularly, a CVVT center bolt replacement stopper for automobiles, which has newly developed a fixing means fixed to a timing chain cover so as to easily replace a CVVT center bolt for automobiles. Relates to a device.

In general, in order to increase the engine efficiency of the vehicle, it is necessary to change the valve opening / closing time at the high speed and the low speed rotation of the engine according to the driving conditions of the vehicle.

In particular, the intake valve opening time is a factor that greatly affects the filling efficiency. When the intake valve is opened early, the valve overlap period becomes longer, and the volume efficiency increases because the intake and exhaust inertia flow can be sufficiently used at high speed, but remains at low speed Increasing the amount of gas decreases the volumetric efficiency and increases HC emissions.

In order to solve this problem, a method of varying the opening and closing timing of the intake valve is a continuously variable valve timing device (CVVT), and the continuously variable valve timing device includes an oil control valve, a cam shaft and an oil circuit. It consists of a vane and a housing.

The oil control valve converts the flow of oil supplied from the oil pump into the forward flow path or the slow flow path of the oil circuit according to the valve timing variable control signal sent from the valve timing controller.

The oil control valve is also referred to as an oil-flow control valve (OCV) and is operated by a solenoid valve.

In addition, the housing is provided with an advance chamber and a perception chamber respectively connected to the advance passage or the perception passage of the oil circuit, causing relative movement of the vane and the housing by the pressure formed by the oil supplied to the advance chamber or the perception chamber. It is a structure to adjust the optimum valve timing according to the engine operating conditions.

That is, by supplying the hydraulic pressure supplied from the oil pump by the oil control valve to the advance passage or the perceptual passage of the oil circuit, the vane is rotated forward or backward by the hydraulic pressure to advance or retard the intake valve timing. It is.

In more detail, when the engine is in an idle state or at a low speed rotation, the oil control valve supplies hydraulic pressure to the advance passage to advance the closing time of the intake valve, and perceives the hydraulic pressure during the high speed rotation of the engine. Supply to the flow path to retard closing time of the intake valve.

The fastening bolt of the conventional continuous variable valve timing device is disclosed in Korean Patent Publication No. 10-2005-0061719, a continuous variable valve timing device (CVVT) 20 on one side of the cam shaft 10 As used to couple the through, the bolt hole formed in the center of the vane 22 is fastened to the nut part inside the cam shaft 10.

In addition, the oil circuit 26 formed at the shaft end of the cam shaft 10 is connected to the flow path 16 formed inside the cam shaft 10 as well as the advance passage and the perceptual flow path of the continuously variable valve timing device 20. .

That is, the flow path 16 formed inside the cam shaft 10 is an oil passage for supplying lubricating oil to the journal perturbation portion 14 of the cam shaft 10, and receives the oil from the oil circuit 26 to supply the cam. It serves as a passage for sending oil to the oil hole 18 formed in the journal perturbation portion 14 of the shaft 10.

The fastening bolt 30 of the continuously variable valve timing device 20 in order to avoid interference with the flow path 16 formed in the cam shaft 10 on the connection structure of the oil circuit 26 of the shaft end of the cam shaft 10 as described above. ), But the length of the fastening bolt 30 is made in the form of a hollow inside, the outside is made in the form of a bolt and is assembled with the cam shaft through the inside of the sprocket, the flow path to the hollow portion, the center of the fastening bolt It consists of a spool valve that can convert the spool valve, a spool valve at the center of the fastening bolt and a return spring at the valve end, and a solenoid actuator for controlling the forward and reverse of the spool valve at the opposite timing chain cover.

The fastening bolt is referred to as the center bolt in the field, the cause of the failure of the fastening bolt can be seen as a typical cause of failure, such as oil contamination or oil shortage, malfunction due to aging and seizure, deformation due to excessive torque tightening, and the like. When the fastening bolts fail due to engine noise, engine failure warning lamp lighting, poor acceleration, and starting off, the fastening bolts should be replaced.

The tightening torque of the fastening bolt is about 10 Kgf-m or more, so it is assembled. When the fastening bolt is turned to just loosen with a general wrench, the cam shaft rotates and cannot be loosened. To loosen it, you must hold the camshaft so that it does not rotate to loosen the fastening bolt.

However, in order to loosen the fastening bolts, it is necessary to disassemble all the various attachments to the cylinder head and hold the camshaft to loosen them, which takes a lot of time, and this may cause additional engine problems. It is good to avoid.

Another method is that there is a significant concern that the timing chain will fall when the fastening bolts are released by holding the crankshaft bolt connected to the camshaft and chain.

If the timing chain catches the crankshaft and loosens the fastening bolt, then the timing chain will pass through the sprocket of the camshaft and the timing chain will have to be removed and the timing chain will be removed again. There is a problem.

Republic of Korea Patent Application Publication No. 10-2005-0061719

The present invention is to solve the above-mentioned conventional problems, the object of the present invention is to improve the structure of the fixing means installed on the front of the center bolt to easily replace the center bolt to shorten the work time for automotive CVVT It is to provide a stopper device for replacing the center bolt.

Another object of the present invention is to replace the CVVT center bolts for automobiles when the engine noise, engine failure warning light on and acceleration failure and start-up, etc. occurs, in this case the coupling member of the sprocket to perform the replacement of the center bolts quickly Insert the rotating projection of the fixing means into the two engaging holes formed in the fixing tool, fix the fixing blade of the fixing means to the timing chain cover with the fixing bolt, and replace the center bolt with the wrench for the center bolt. It is to provide a stopper device for replacing a CVVT center bolt for automobiles to prevent an accident.

Another object of the present invention is to disassemble all the various parts attached to the cylinder head in order to replace the center bolt in the prior art and to eliminate the cumbersome work of rotating the center bolt holding the cam shaft, and the center bolt If the timing chain rides over the sprocket during the replacement process, it provides a stopper device for replacing the CVVT center bolt for automobiles, which eliminates the need to remove the timing chain and start the timing chain again.

Still another object of the present invention is to provide a stopper device for replacing a CVVT center bolt for an automobile, which allows the solenoid actuator installed on the front face of the center bolt to be coupled to and detached from the front face of the timing chain cover.

Still another object of the present invention is to form a plurality of fixing projections and rotating projections continuously on the front of the body of the fixing means, the rotating projections control the rotation of the sprocket, the fixing projections by pushing the sprocket in the direction of the cam shaft, the sprocket cam To provide a stopper device for the replacement of the CVVT center bolt for the vehicle to prevent the deviation from the shaft.

Still another object of the present invention is to provide a stopper device for replacing a CVVT center bolt for a vehicle in which two engaging holes are integrally formed inside the front surface of the sprocket so that the rotation protrusion of the fixing means is inserted to control the rotation of the sprocket. will be.

In order to achieve the object of the present invention as described above, the stopper device for CVVT center bolt replacement for a vehicle according to the present invention is installed on the cam shaft installed in the engine of the vehicle, the sprocket is installed on the front surface of the sprocket fixing member And fixing means for protruding the support frame on the front surface of the coupling member, forming two coupling holes on the inner circumferential surface of the support frame, and replacing the center bolts installed on the front inner surface of the sprocket. To the chain cover,

The fixing means continuously protrudes the two fixing protrusions and the rotating protrusions on the front of the body to insert the rotating protrusion into the coupling hole formed in the front of the sprocket to control the rotation of the sprocket, and the fixed wing on both sides of the body integrally And a fixing hole formed in the fixed wing to fix the bolt hole formed at the front of the timing chain cover using the fixing bolt to prevent the fixing protrusion from escaping to the outside, and formed at the center of the body. The center bolt is exchanged by inserting a wrench for the center bolt into the insertion hole.

According to the present invention as described above, the present invention can reduce the working time by simply replacing the center bolt using a wrench for the center bolt in the state in which the fixing means is installed on the front surface of the timing chain cover to control the rotation of the sprocket. It has an effect.

In the present invention, when the engine noise, engine failure warning light on and poor acceleration and start-up, etc. should be replaced, the CVVT center bolt for the automobile should be replaced, wherein the coupling member of the sprocket is formed on the coupling member so as to quickly replace the center bolt. Insert the rotating projection of the fixing means into the two coupling holes, fix the fixing vane of the fixing means to the timing chain cover with the fixing bolt, and replace the center bolt with the wrench for the center bolt, to prevent the timing chain from riding over the sprocket. It can work.

The present invention is to disassemble all the various parts attached to the cylinder head in order to replace the center bolt in the prior art, and the effect of eliminating the cumbersome work of rotating the center bolt holding the cam shaft, and in the process of replacing the center bolt If the timing chain crosses the sprocket, it can eliminate the hassle of removing the timing chain and running the timing chain again.

The present invention has the effect that the solenoid actuator installed in the front of the center bolt can be coupled and separated by using a bolt in the bolt hole of the timing chain cover.

The present invention forms a plurality of fixing projections on the front of the body of the fixing means, by forming a rotating projection integrally smaller than the fixing projection on the front of the fixing projections, the rotating projections control the rotation of the sprocket, the fixing projections the sprocket camshaft While pushing in the direction in which the sprocket is effective to prevent the departure from the camshaft.

According to the present invention, two coupling holes are integrally formed inside the front surface of the sprocket, and the rotation protrusion of the fixing means is inserted into the coupling hole, thereby controlling the rotation of the sprocket.

The present invention is an invention that has the effect of improving the efficiency of the automobile maintenance by developing a new fixing means to easily replace the center bolt.

1 is a perspective view of the present invention stopper device.
2 is a front configuration diagram of an engine provided with a CVVT center bolt for an automobile according to the present invention.
3 is a block diagram of the engine and timing chain cover of the present invention.
Figure 4 is a configuration diagram installed and the center bolt is installed on the timing chain cover of the present invention.
5 is a perspective view showing a separation state of the present invention fixing means and the center bolt.
Figure 6 is a schematic view showing a state in which the fixing means of the present invention combined.
Figure 7 is a block diagram showing a coupling state of the sprocket and the timing chain of the present invention.
8 is a perspective view of another embodiment of the fixing means of the present invention.
Figure 9 is a block diagram showing another embodiment of the present invention fixing means and sprockets.

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

1 to 9, the present invention maintains the state fixed by the center bolt 18 by coupling the sprocket 13 to the front surface of the cam shaft 12 installed in the engine 10 for automobiles. The coupling member 14 is fixed to the front surface of the sprocket 13 with a fixing pin 17, and two coupling holes are provided on the inner circumferential surface of the support frame 15 protruding toward the front surface of the coupling member 14. The center bolt 18 can be replaced using the center bolt wrench 30 in a state in which the rotation protrusion 23 of the fixing means 20 is inserted to control the rotation of the sprocket 13 by forming the 16. So that it is composed largely.

The sprocket 13 is coupled to the cam shaft 12 and installed inside the upper end of the timing chain cover 11, so that the center bolt 18 coupled to the inside of the sprocket 13 is not exposed from the outside of the solenoid actuator. (A) can be coupled to and separated from the bolt hole (11a) formed in the front of the timing chain cover 11 by using a bolt, the solenoid actuator (A) is a computer for controlling the engine (10) Receives an electrical signal from the ECU and forwards / reverses to push and pull the spool valve formed inside the center bolt 18, and to replace the center bolt 18, the solenoid actuator A is separated. The replacement operation is carried out, the front sprocket 13 of the coupling member 14 is firmly fixed with a fixing pin 17, the coupling member 14 to surround the center bolt 18 exposed to the front G While penetrating the inside of the support frame 15 in a circular manner, a wrench for the center bolt 30 to be described later may be inserted, and a plurality of coupling holes 16 are formed in the inner circumferential surface of the support frame 15. By inserting the rotary projection 23 of the fixing means 20 to be described later to be able to control the rotation of the sprocket (13).

Fixing means 20 for controlling the rotation of the sprocket 13, the two fixing projections 22 are formed to protrude on the front of the body 21, the fixing projection 22 on the front of the fixing projection 22 Smaller protrusions of the projections 11 continuously insert the rotary projections 23 into the two coupling holes 16 formed in the coupling member 14 to control the rotation of the sprocket 13, and the coupling holes 16 When the fixing protrusion 22 is in close contact with the circumferential surface of the) and the sprocket 13 is coupled to the cam shaft 12 to control the rotation of the sprocket 13, the timing chain 19 opens the sprocket 13. It is possible to prevent the accident to be carried over, and when the timing chain 19 is carried over the sprocket 13, many parts attached to the timing chain cover 11 in order to peel off and assemble the timing chain 19. To solve the problem of having to separate all the I can do it.

The fixed blades 24 are integrally formed on both side surfaces of the body 21, and the fixing holes 25 are formed in the fixed blades 24, and the timing chain cover 11 is formed using the fixing bolts 26. When fixed to the front of the () to prevent the sprocket 13 from escaping to the outside while the fixing protrusion 22 presses the support frame 15, the center bolt in the insertion hole 27 formed in the center of the body 21 By inserting the wrench 30, the center bolt 18 can be replaced quickly.

The fixing protrusion 22 and the rotating protrusion 23 formed on the front surface of the body 21 may be manufactured in the same number as the number of the coupling holes 16, and the fixing protrusion 22 and the rotating protrusion 23 may be formed. It can also be produced by selecting any one of two or three.

When the fixing operation of the fixing means 20 is completed, the socket 33 of the wrench 30 for the center bolt is inserted into the insertion hole 27 to fix the center bolt 18, and the guide connected to the socket 33. The part 32 extends to the outside of the engine 10 so that the center bolt 18 can be disassembled with a small force, and the operator who forms the handle 31 at the end of the guide part 32 is a handle ( 31) holding and rotating has the feature that the center bolt 18 can be easily separated.

FIG. 9 is a view illustrating another embodiment of the CVVT center bolt replacement stopper device for automobiles, except for the same parts as those described above, and only the difference parts, and two coupling holes 16 on the inner circumferential surface of the sprocket 13. ) Is integrally formed so that the installation work of the coupling member 14 is omitted.

Stopper device for CVVT center bolt replacement for automobiles according to the present invention configured as described above is operated as follows.

The main causes of the failure of CVVT center bolts for automobiles are oil pollution, oil shortage, malfunction due to aging and seizure, deformation due to excessive torque tightening, and the like. When the engine failure warning light is turned on and the acceleration is poor and the engine is turned off, the center bolt should be replaced. In the past, the work required to take a long time because the various parts attached to the cylinder head had to be dismantled. The CVVT center bolt replacement stopper device for automobiles of the present invention is a new invention in which the fixing means 20 is newly developed so as to be able to work quickly without disassembling the parts attached to the automobile engine 10.

If a failure occurs in the center bolt 18, the solenoid actuator A coupled to the bolt hole 11a of the timing chain cover 11 is first removed, and the rotation protrusion 23 of the fixing means 20 is removed. Inserted into the coupling hole 16 of the coupling member 14, the fixing blade 24 of the fixing means 20 is in close contact with the timing chain cover 11 to insert the fixing bolt 26 into the fixing hole 25. If the fixing means 20 is firmly fixed to the timing chain cover 11 while the front surface of the fixing protrusion 21 presses the front surface of the support frame 15 while the sprocket 13 is cam shaft ( 12 can be prevented in advance, and since the sprocket 13 remains firmly fixed to the cam shaft 12, the timing chain 19 is removed in the process of removing the center bolt 18. It is possible to prevent the accident that the timing chain 19 is loosened while riding over the sprocket 13. It is characterized.

When the fixing means 20 is fixed to the timing chain cover 11, the socket 33 of the center bolt wrench 30 is coupled to the insertion hole 27 to rotate the handle 31. There is a feature that can be separated and replaced (18) easily and quickly.

The fixing protrusion 22 and the rotating protrusion 23 of the fixing means 20 may be manufactured by selecting any one of two or three according to the working conditions, and using the fixing means 20, the conventional engine After removing the parts attached to the (10) has a feature that can reduce the work time of 3 hours or more required to replace the center bolt 18 within about 10 minutes.

The CVVT center bolt replacement stopper device for automobiles according to the present invention described above is not limited to the above-described embodiments, and is conventional in the field to which the present invention pertains without departing from the gist of the present invention as claimed in the following claims. Anyone with knowledge has the technical spirit to the extent that various changes can be made.

10: engine 11: timing chain cover
11a: bolt hole 12: camshaft
13: sprocket 13a: coupling hole
14: engaging member 15: support frame
16: coupling hole 17: fixing pin
18: Center bolt 19: Timing chain
20: fixing means 21: body
22: fixed protrusion 23: rotating protrusion
24: fixed wing 25: fixed hole
26: fixing bolt 27: insertion hole
30: center bolt wrench 31: handle
32: guide part 33: socket
A: Solenoid Actuator

Claims (7)

The sprocket 13 is installed on the cam shaft 12 installed in the vehicle engine 10, and the coupling member 14 is fixed to the front surface of the sprocket 13 with the fixing pin 17, and the coupling member ( 14 protrudes the support frame 15 on the front surface, and forms two coupling holes 16 on the inner circumferential surface of the support frame 15, and a center bolt installed inside the front surface of the sprocket 13 ( 18, the fixing means 20 to replace the timing chain cover 11,
The fixing means 20 continuously protrudes the two fixing protrusions 22 and the rotating protrusions 11 on the front surface of the body 21 and the rotating protrusions 23 on the coupling holes 16 formed on the front surface of the sprocket 13. ) To control the rotation of the sprocket 13, to form the fixed blade 24 integrally on both sides of the body 21, and to form a fixing hole 25 in the fixed blade 24 When the fixing bolt 26 is fixed to the bolt hole 11a formed on the front surface of the timing chain cover 11, the fixing protrusion 22 prevents the sprocket 13 from escaping to the outside and the body 21. CVVT center bolt replacement stopper device for cars, characterized in that for inserting the center bolt wrench (30) in the insertion hole (27) formed in the center of the center to replace the center bolt (18). The front surface of the fixing protrusion 22 of the fixing means 20 is in close contact with the front surface of the support frame 15 to maintain the sprocket 13 fixed to the cam shaft 12. Stopper device for replacing CVVT center bolt for automobile. According to claim 1, wherein the three fixing projections 22 protrude on the front surface of the body 21 of the fixing means 20, rotating projections 23 smaller than the fixing projections 22 on the front surface of the fixing projections (22). Stop) is a CVVT center bolt replacement stopper device for a vehicle, characterized in that is protruded and inserted into the coupling hole (16) of the coupling member (14). According to claim 1, The wrench for the center bolt 30 extends the guide portion 32 to the front of the handle 31, the end of the guide portion 32 of the same standard as the center bolt 18 CVVT center bolt replacement stopper device for automobiles, characterized in that the socket 33 is coupled. The stopper apparatus for replacing a CVVT center bolt for automobiles according to claim 1, wherein a solenoid actuator (A) is installed on the front surface of the center bolt (18) and fixed to the bolt hole (11a) using a bolt. The sprocket 13 is installed on the cam shaft 12 of the vehicle engine 10 and the fixing means 20 for replacing the center bolt 18 installed inside the front surface of the sprocket 13 is timed. To the chain cover (11),
The fixing means 20 is a rotary protrusion in the coupling hole 16 formed on the inner circumferential surface of the sprocket 13 by continuously projecting the two fixing protrusions 22 and the rotating protrusions 23 on the front of the body 21. Inserting (23) to control the rotation of the sprocket (13), to form a fixed blade 24 integrally on both sides of the body 21, the fixing hole (25) inside the fixed blade (24) And fixing to the timing chain cover 11 by using the fixing bolt 26 to be in close contact with the fixing protrusion 22 and the sprocket 13 to maintain the fixed state on the cam shaft 12, the body 21 Stopper device for CVVT center bolt replacement for automobiles, characterized in that for inserting the socket (33) installed in the center bolt wrench 30 in the insertion hole (27) formed in the center thereof to replace the center bolt (18). According to claim 6, The wrench for the center bolt 30 extends the guide portion 32 to the front of the handle 31, the end of the guide portion 32 of the same standard as the center bolt 18 CVVT center bolt replacement stopper device for automobiles, characterized in that the socket 33 is coupled.

Images