KR100455749B1 - Inhalation and cutout valve overhaul device for engine - Google Patents

Abstract

The present invention provides an engine intake / exhaust valve installed in a region adjacent to a spark plug fastener of a cylinder head to attach and detach a valve spring retainer fixed to a retainer lock at an upper end of each valve stem of an intake / exhaust valve of an intake / exhaust valve of a combustion chamber. A detachable device, comprising: a support block disposed on an upper portion of the spark plug fastener and having a shaft through-hole formed in the center thereof, and a support block extending from the fixed part to an upper portion of the valve stem; A block having a hollow shaft inserted into the shaft through-hole and having a lower end coupled to the spark plug fastener, and fixedly coupled to the hollow shaft so that the support block can be detachably fixed to the upper portion of the cylinder head; A fixing member; At least one pair of guide compression units coupled to the extension unit to move up and down along a central axis line extending from the central axis line of each valve stem; And a detachable guide interposed between the guide compression shaft and the valve spring retainer to pressurize the valve spring retainer downward when the guide compression moves downward.

Thereby, the intake and exhaust valve detachment apparatus for an engine which has a simple structure and can disassemble a plurality of valves conveniently in a short time without complicated setting process is provided.

Description

Inhalation and cutout valve overhaul device for engine}

The present invention relates to an engine intake / exhaust valve detachment apparatus, and more particularly, to an engine intake / exhaust valve detachment apparatus capable of easily attaching and detaching a plurality of intake / exhaust valves.

The typical classification of gasoline engines is a single over head camshaft (SOHC) engine in which one intake and exhaust valve is installed in one combustion chamber and these valves are opened and closed by one camshaft, and one intake and exhaust valve in one combustion chamber. It can be distinguished by a double overhead camshaft (DOHC) engine, which is installed in pairs and whose intake and exhaust valves are opened and closed by two camshafts, respectively.

In the intake and exhaust valve of the gasoline engine, when the parts constituting the valve are worn out or damage such as abrasion occurs, abnormal symptoms such as engine output flow into the combustion chamber or engine output decrease due to incompatibility of the intake exhaust, etc. In time, the components of the intake and exhaust valves must be repaired or replaced.

Hereinafter, the configuration and installation structure of the intake / exhaust valve of the engine will be described by taking an example of a DOHC engine which forms the mainstream of a gasoline engine.

1 is an exploded perspective view of a cylinder head and an intake / exhaust valve of a typical DOHC engine. As shown in this figure, in the structure of the cylinder head 60, a plurality of spark plug fasteners 61 are formed in the upper inner center along the longitudinal direction, and a combustion chamber at the inner bottom of the spark plug fastener 61. It has a structure in which the plug fastening hole 61a which penetrated toward 69 is formed.

In addition, valve pairs 63 are provided in pairs on both sides of each spark plug fastener 61, and valve guide holes 63a for guiding the opening and closing operation of the valve are formed in each valve coupling part 63. have. The axis of both valve guide holes 63a forms a narrow angle with a U-shape with respect to the axis of the spark plug fastener 61, and the valve guide 72 to be described later is coupled to each valve guide hole 63a.

Meanwhile, the intake and exhaust valves 70 and 70 'are divided into the intake valve 70 and the exhaust valve 70' according to the role of each valve and the installation position thereof, but the configuration thereof is the same.

Each valve includes an opening and closing portion 71a for opening and closing the inlet 65 and the exhaust port 67 of the cylinder head 60, and extends in a rod shape from the opening and closing portion 71a to pass through the valve guide 72 so that the upper end region is the cylinder head. A valve body 71 having a valve stem 71b located inside the upper portion of the upper portion 60; A valve guide 72 coupled to the valve guide hole 63a to guide the valve stem 71b to support the opening and closing operation of the valve; A valve stem seal (73) coupled to the upper end region of the valve guide (72) to seal between the valve stem (71b) and the valve guide (72); A valve spring seat 75 installed to surround the valve guide 72 on the valve coupling part 63 of the cylinder head 60; A valve spring retainer 76 coupled at the upper end region of the valve stem 71b; A valve spring coupled between the valve spring seat 75 and the valve spring retainer 76 to surround the valve stem 71b to elastically pressurize the valve body 71 in the closing direction of the inlet port 65 or the exhaust port 67 ( 77); It is composed of a pair of semi-circular retainer locks 79 coupled to the upper end of the valve stem 71b to maintain the mutually engaged state of the aforementioned valve components.

When disassembling to repair or replace the intake and exhaust valves 70 and 70 'having such a configuration, the retainer lock 79 may be removed from the valve stem 71b.

Looking at the decomposition of the valve in detail as follows. First, the operator compresses the valve spring retainer 76 using a separate tool, as shown in FIGS. 2A and 2B. Then, the semicircular retainer lock 79 coupled to the upper end of the valve stem 71b is spaced apart from the valve retainer. While maintaining this state, the exposed retainer lock 79 is pulled out using tweezers or the like, whereby other components including the valve spring retainer 76 can be separated.

However, this valve disassembly process is very difficult and inefficient because the retainer lock 79, which is a relatively small part, must be removed from the narrow space while maintaining the state in which the large repulsive valve spring 77 is compressed by a manpower. If a worker misses a work tool due to a mistake of the operator, there is a problem such as damaging an important part of the cylinder head 60.

In order to solve this problem, the Republic of Korea Utility Model Publication "DOHC type and SOHC engine combined valve retainer lock removal device (Registration No. 20-0268719)" has been disclosed.

Conventional DOHC and SOHC engine combined valve retainer lock detachable device 101, as shown in Figure 3 and 4, the height of the hollow height adjustment screw 113 and the fastening screw 115 is formed in the upper and lower respectively Support means 110 having an adjustment rod 111, the position adjusting means 120 coupled to the vertical, horizontal movement and the radial rotational movement relative to the height adjustment rod 111, and the position adjusting means 120 It is composed of an angle adjusting means 130 is rotatably coupled to one end, and a detachable means 140 is coupled to the lower portion of the angle adjusting means 130 so as to be movable up and down.

However, such a conventional DOHC type and SOHC type valve retainer lock attachment and detachment device has a problem in that its structure is very complicated, resulting in an increase in manufacturing cost.

In addition, since the operator has to set the position of the position adjusting means, the angle adjusting means, and the detaching means for the disassembly work of the valve, there is a problem that it is very inconvenient to use and takes a lot of working time.

Moreover, even after completing uncomfortable setting work, there is only one valve that can be disassembled, and in order to disassemble other valves, it is necessary to release the setting and then set it again according to the valve to be disassembled. There is a problem.

Accordingly, an object of the present invention is to provide an engine intake / exhaust valve attachment / detachment device having a simple structure and capable of disassembling a plurality of valves in a short time without a complicated setting process.

1 is an exploded perspective view of a cylinder head and an intake / exhaust valve of a typical DOHC engine;

2A and 2B are enlarged cross-sectional views of the intake / exhaust valve of FIG.

3 is a perspective view of a conventional valve detachment device,

4 is a cross-sectional view of the valve detachment apparatus of FIG. 3 mounted to the cylinder head of the engine;

Figure 5 is a perspective view of the cylinder head before the installation of the engine intake and exhaust valve detachment device according to the first embodiment of the present invention,

6 is a cross-sectional view of the engine intake / exhaust valve detachment apparatus of FIG. 5 mounted on the cylinder head;

7A and 7B are enlarged cross-sectional views of part “A” of FIG. 6, illustrating a process of attaching and detaching an intake / exhaust valve

8 to 10 are perspective views of the engine intake and exhaust valve detachment apparatus according to the second to fourth embodiments of the present invention, respectively.

* Explanation of symbols for the main parts of the drawings

10: support block 11: fixed part

12: extension 20: block fixing member

21: hollow shaft 23: fixed knob

30: guide compression 33: contact end

40: detachable guide 41: guide space

50: cylinder head 70: intake valve

70 ': exhaust valve 71b: valve stem

77: valve spring

According to the present invention, the valve spring retainer fixed to the upper end of each valve stem of the intake and exhaust valves installed in the adjacent area of the ignition plug fastener of the cylinder head to open and close the intake and exhaust of the combustion chamber, respectively, is detachable. An engine intake / exhaust valve attachment / detachment apparatus, comprising: a support block disposed on an upper portion of the spark plug fastener and having a shaft through-hole formed in the center thereof, and a support block extending from the fixed portion to an upper portion of the valve stem; A block having a hollow shaft inserted into the shaft through-hole and having a lower end coupled to the spark plug fastener, and fixedly coupled to the hollow shaft so that the support block can be detachably fixed to the upper portion of the cylinder head; A fixing member; At least one pair of guide compression units coupled to the extension unit to move up and down along a central axis line extending from the central axis line of each valve stem; Interposed between the guide compression and the valve spring retainer is achieved by the engine intake and exhaust valve removable device comprising a detachable guide for pressing down the valve spring retainer when the guide compression moves downward.

Here, the intake valve and the exhaust valve are provided with a pair of the spark plug fastening holes on both sides, the compression shaft fastening hole and the guide compression is provided in pairs corresponding to the intake valve and the exhaust valve, The guide compression is preferably provided with a bolt and is fastened to the pressing shaft fastening hole so as to be able to move up and down, respectively.

A contact end having a triangular pyramid cross section is formed at a lower end of the guide compression shaft, and a centering groove corresponding to the contact end is formed at the center of the upper end of the detachable guide, and at least one circumference of the centering groove. It is effective that the variable center setting groove of is formed.

On the other hand, the extension portion is a fixed extension portion extending integrally from the fixed portion, the movable extension portion is coupled to the sliding extension relative to the fixed extension portion and the guide compression compression is coupled to the extension end region, the sliding of the movable extension portion It may be provided with positioning means for fixing and releasing the position.

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

5 is a perspective view before mounting the cylinder head of the engine intake and exhaust valve detachment apparatus according to the first embodiment of the present invention, Figure 6 is a cross-sectional view of the engine intake and exhaust valve detachment apparatus of FIG. As shown in these drawings, the engine intake / exhaust valve detachment apparatus 1 according to the present invention includes a support block 10 coupled to an upper portion of the engine cylinder head 60, and the support block 10 to the cylinder head 60. It includes a block fixing member 20 to be detachably coupled to the), the guide compression 30 for pressing the valve spring retainer 76 and the detachable guide 40.

The support block 10 includes a fixing part 11 fixed to the upper portion of the spark plug fastening hole 61 formed in the cylinder head 60, and an extension part extending in both width directions from the upper part of the fixing part 11 ( 13)

In the center of the fixing portion 11, a shaft through hole 11a having a central axis located on the same line as the central axis of the spark plug fastener 61 is formed. In addition, a block positioning part 11b for setting the installation position of the support block 10 protrudes in parallel with the extension part 13 below the fixing part 11, and this block positioning part 11b. The block fixing hole 11c corresponding to the camshaft engaging hole 69a formed in the camshaft fixing part 11 and 69 of the cylinder head 60 is formed in this.

The extension part 13 is formed integrally with the fixing part 11, and an upper end area of each valve stem 71b of the intake valve 70 and the exhaust valve 70 'coupled to the cylinder head 60 is extended. Extends to. In addition, a pair of pressing shaft fastening holes 13a are formed in both extension end regions of the extension part 13 to which the guide compression shaft 30 is coupled to be movable up and down. At this time, each pressurizing shaft fastening hole 13a has the center axis of each of the valve stems 71b of the intake valve 70 and the exhaust valve 70 ', which are provided in pairs on both sides of the spark plug fastening opening 61. It is formed at the same angle on the same line as the axis.

The structure of the support block 10 according to the present embodiment corresponds to the cylinder head 60 structure of the DOHC engine and the installation structure of the intake valve 70 and the exhaust valve 70 'of the gasoline engine. The installation position of (11), the extension length of the extension part 13, the formation position and the formation angle of the pressurized shaft fastening hole 13a, and the like, and the cylinder head 60 structure of various DOHC engines and the intake / exhaust valve 70 70 ') is manufactured to be compatible with the installation structure. In addition, the structure of the support block 10 may be manufactured in a structure corresponding to the size and structure of the engine according to the displacement.

The block fixing member 20 is coupled to the hollow shaft 21 and the hollow shaft 21 inserted into the shaft through hole 11a of the support block 10 to detach the support block 10 from the cylinder head 60. It is composed of a fixing knob for possible fixing.

The lower end of the hollow shaft 21 is formed with a fastening screw portion 21a fastened to the bottom of the spark plug fastener 61, and the fixing knob is coupled to the upper outer circumferential surface of the hollow shaft 21 so as to be movable up and down in a screw manner. The knob screw engaging portion 21b is formed. In addition, the upper end of the hollow shaft 21 is formed with a hose connecting portion 21c for connecting with an external compressor (not shown) and the hose 81.

The fixed knob is fastened to the knob screw coupling portion 21b of the hollow shaft 21 to move up and down along the hollow shaft 21, and presses the upper portion of the support block 10 downward when the downward movement is performed, thereby pushing the support block 10 to the cylinder. It is fixed to the head 60.

Guide compression (30) is provided with a bolt having a head portion 31 is coupled to the pressing shaft fastening hole (13a) of the support block 10, the extension portion 13 so as to be movable, and has a triangular pyramid cross section at the lower end The contact end 33 is formed. The guide pressing compression 30 is fastened to the pressing shaft fastening hole 13a, and is disposed at the same angle on the same axis as the central axis of the valve stem 71b.

In addition, forming the contact end portion 33 of the triangular pyramid cross section at the lower end of the guide compression shaft 30 is to correspond to the centering groove 43 formed at the center of the upper end portion of the detachable guide 40 which will be described later. It is to maintain the correct center when pressing the detachable guide 40 to the pressing shaft (30).

The detachable guide 40 has a cylindrical shape in which a guide space 41 is opened, in which an upper end region of the valve stem 71b and a retainer lock 79 are accommodated, and the guide space 41 is external. An opening 41a is formed at one side so as to be exposed. In addition, a centering groove 43 corresponding to the contact end 33 of the guide compression shaft 30 is formed at the center of the upper end of the guide space 41, and at least one variable around the centering groove 43. The centering groove 45 is formed.

Here, the variable center setting groove 45 is for changing the pressure point of the detachable guide 40 according to the installation position of the valve, and corresponds to various installation structures and installation angles of the valve according to the size and shape of the engine. .

In addition, a magnetic body 47 is provided in the guide space 41 of the detachable guide 40 to prevent the retainer lock 79 separated from the valve stem 71b from being lost.

With this configuration, the process of disassembling the intake valve 70 and the exhaust valve 70 'by using the engine intake / exhaust valve detachment apparatus 1 according to the present invention will be described.

First, as shown in FIG. 5, the support block 10, on which the guide compression shaft 30 is installed, is disposed on the spark plug fastener 61 of the cylinder head 60. At this time, the block fixing hole (11c) formed in the block positioning portion (11b) of the support block 10 is positioned in the cam shaft coupling hole (69a) of the cylinder head (60) cam shaft fixing portion (11) 69 It is preferable to fasten bolts or the like to these block fixing holes 11c and the cam shaft coupling holes 69a.

After arranging the support block 10, the hollow shaft 21 to which the fixing knob is fastened is inserted into the shaft through hole 11a of the support block 10. Then, the fastening screw portion 21a formed at the lower end of the hollow shaft 21 is fastened to the bottom of the spark plug fastener 61, and then the fixing knob is moved downward to press the upper portion of the support block 10 downwardly. Likewise, the support block 10 is fixed to the cylinder head 60.

Then, the hose 81 connected to the compressor (not shown) is connected to the hose connecting portion 21c of the upper end of the hollow shaft 21.

When the installation of the support block 10 and the hollow shaft 21 is completed, each guide compression (40) in the state sandwiched between the guide compression shaft 30 and the valve spring retainer 76, each guide compression ( By rotating the 30 to move downward so that the contact end 33 is in contact with the centering groove 43 of each detachable guide (40). At this time, the central axis of the guide compression shaft 30, the removable guide 40 and the valve stem 71b is naturally located on the same axis, which is the length of the extension portion 13 of the support block 10 and tightening the pressure shaft. Since the structure of the ball 13a etc. is manufactured corresponding to the cylinder head 60 structure of the engine which is a valve decomposition object, and the installation structure of the intake valve 70 and the exhaust valve 70 ', it is possible. On the other hand, depending on the structure of the engine and the working environment, the installation angle of the detachable guide 40 may be changed somewhat. This is achieved by the variable center setting groove 45 formed around the center setting groove 43 of the detachable guide 40.

When installation of the detachable guide 40 is completed, a compressor (not shown) is operated so that compressed air is injected into the combustion chamber 69 through the hollow shaft 21. The compressed air injected into the combustion chamber 69 presses the valve body 71 of the intake valve 70 and the exhaust valve 70 'upwardly in the closing direction.

In this state, when the guide compression shaft 30 is rotated to move downward by using a tool, each guide compression shaft 30 presses the detachable guides 40 downward. 7A and 7B, the upper end of each valve stem 71b and the retainer lock 79 are accommodated in the guide space 41 of the detachable guide 40, and the magnetic material provided in the guide space 41. The retainer lock 79 is separated from the valve stem 71b by the magnetic force of 47 and adheres to the magnetic body 47.

When the retainer lock 79 is separated, when the reverse rotation is performed such that each of the guide compression shafts 30 is moved upward again by using a tool, each of the guide compression shafts 30 is spaced apart from each of the detachable guides 40 and the detachable guide 40. ) Can be removed. At this time, the compressor (not shown) is stopped.

In this state, the operator may use the valve spring retainer 76, the valve spring 77, the valve spring seat 75, the valve spring seal 73, and the valve constituting the plurality of intake valves 70 and exhaust valves 70 ′. Valve components such as the guide 72 and the valve body 71 can be easily disassembled.

On the other hand, Figure 8 is a perspective view of the engine intake and exhaust valve detachment device according to a third embodiment of the present invention. As shown in this figure, the engine intake / exhaust valve detachment apparatus 1a according to the present embodiment has almost the same configuration as the above-described first embodiment except for the extension 13a of the support block 10a. Hereinafter, only the extension 13a of the support block 10a will be described.

The extension part 13a provided in the support block 10a of the engine intake / exhaust valve attachment / detachment device 1a according to the present embodiment is fixed to the fixed extension part 15 which is integrally extended to both sides from the fixing part 11a. The moving extension part 17 which is slidably coupled with respect to the extension part 15, and the positioning means 19 which fix and release the sliding position of the moving extension part 17 are provided.

The fixed extension part 15 is provided with the sliding access part 15a which the mobile extension part 17 slides in and out partially. In addition, the guide compression compressor 30a is coupled to the extension end of the moving extension part 17 so as to be movable.

Positioning means 19 is a positioning bolt (19a) provided in the sliding access portion (15a) and a plurality of positioning holes (19b) formed at predetermined intervals along the longitudinal direction on the moving extension portion (17). It is prepared. At this time, the interval of the positioning hole (19b) is formed at intervals that can correspond to the installation interval of the intake, exhaust valves 70, 70 'of various engines.

Here, the sliding access portion 15a and the positioning bolt 19a may be provided in the moving extension part 17, and the positioning hole 19b may be provided in the fixed extension part 15.

The intake / exhaust valve detachment apparatus 1a for the engine according to the present embodiment having such a configuration can adjust the length of the extension part 13a in correspondence with the installation positions of the intake / exhaust valves 70 and 70 'of various engines, so that the use range is varied. It is effective.

On the other hand, Figure 9 is a perspective view of the engine intake and exhaust valve detachment device according to a third embodiment of the present invention. As shown in this figure, the engine intake / exhaust valve detachment apparatus 1b according to the present embodiment has a structure in which guide compression shafts 30b are provided, one at each end region of the extension portion 13 of the support block 10b. Has The intake / exhaust valve detachment apparatus 1b for the engine is an intake / exhaust valve detachment apparatus 1b applicable to an SOHC engine in which an intake valve 70 and an exhaust valve 70 'are provided at both sides of the spark plug fastening opening 61, respectively. It is shown.

On the other hand, Figure 10 is a perspective view of the engine intake and exhaust valve detachment device according to a fourth embodiment of the present invention. As shown in this figure, in the engine intake / exhaust valve detachment apparatus 1c according to the present embodiment, the extension part 13 of the support block 10c is formed only on one side of the fixing part 11, and the extension thereof. It has a structure in which a pair of guide compression compressor 30c is provided in the end region. The intake and exhaust valve detachment device 1c for the engine includes an intake and exhaust valve detachment device 1c that can be applied to an SOHC engine having an intake valve 70 and an exhaust valve 70 'installed at one side of the spark plug fastening hole 61. It is shown.

As described above, the engine intake / exhaust valve detachment apparatus according to the present invention is provided such that the structure of the support block and the guide compression and detachment guide coupled thereto corresponds to the cylinder head structure of the engine and the number and installation positions of the intake / exhaust valves. In the state in which the support block is simply installed in the cylinder head, a plurality of intake valves and exhaust valves can be easily disassembled by using each guide compression and detachment guide without setting a separate position.

As a result, the disassembly and assembly work of the intake / exhaust valve installed in the cylinder head of the engine can be performed quickly and easily, thereby improving the work efficiency.

As described above, according to the present invention, there is provided an engine intake / exhaust valve attachment / detachment device having a simple structure and capable of disassembling a plurality of valves in a short time without a complicated setting process.

Claims (4)

An engine intake / exhaust valve attachment / detachment device for attaching or detaching a valve spring retainer fixed to a retainer lock on an upper end of each valve stem of an intake / exhaust valve to open / close the intake / exhaust ports of a combustion chamber respectively. , A support block disposed on the spark plug fastener and having a shaft through-hole formed in the center thereof, and a support block extending from the fixing part to the valve stem; A block having a hollow shaft inserted into the shaft through-hole and having a lower end coupled to the spark plug fastener, and fixedly coupled to the hollow shaft so that the support block can be detachably fixed to the upper portion of the cylinder head; A fixing member; At least one pair of guide compression units coupled to the extension unit to move up and down along a central axis line extending from the central axis line of each valve stem; And an attachment / detachment guide interposed between the guide compression shaft and the valve spring retainer to pressurize the valve spring retainer downward when the guide compression moves downward. The method of claim 1, The intake valve and the exhaust valve are provided with a pair of spark plug fastening holes on both sides, The compression shaft fastening hole of the extension part and the guide pressure compression are provided in pairs corresponding to the intake valve and the exhaust valve, The guide compression is provided with a bolt and the intake and exhaust valve attachment and detachment device for the engine, characterized in that fastened to the pressing shaft fastening hole, respectively. The method of claim 1, The lower end of the guide compression is formed with a contact end having a triangular pyramid cross section, A centering groove corresponding to the contact end is formed at the center of the upper end of the detachable guide, At least one variable center setting groove is formed around the center setting groove. The method of claim 1, The extension portion A fixed extension part integrally extending from the fixed part, A movable extension part coupled to the fixed extension part so as to be slidably movable and having the guide compression coupled to an extended end area; And a positioning means for fixing and releasing the sliding position of the movable extension part.