KR200437428Y1 - The upper and lower jig unit of the fuel pressure regulator - Google Patents

Abstract

The present invention relates to a pressurizing and fixing jig unit for the pressure regulator of the fuel pressure regulator, the pressurizing portion 40 is made of a hollow type having a predetermined inner diameter on the inner side and is installed in front of the main body 31 on the outer side. A slider housing 41 connected to the movement guide part 34 to be elevated; Fixing means are respectively provided at the upper and lower ends and the guide shaft 45 is fitted to the inner side of the slider housing to be lowered together when the slider housing is lowered; A slider 42 fitted to an outer circumference of the guide shaft 45 to be fixedly fitted to be slidable up and down inside the slider housing 41; A first shot spring 41a fitted to an outer circumference of the guide shaft at an upper end of the slider to press the slider downward when the slider moves upward; A punch 46 having a predetermined length having a predetermined pressure portion formed at a lower end thereof and a top end fixed to a lower end of the guide shaft 45 to punch the regulator fixed on the support 60; The collet chuck movement and fixing means 43 and the collet chuck 47 fixedly installed at the lower end of the slider 42 to fix the regulator so as to prevent the flow of the regulator when the punch 46 penetrates through the center thereof are punched in the regulator. It consists of;

Fuel pressure regulator, pressure regulator, pressurization part, support part

Description

Pressure and support structure for the pressure regulator of the fuel pressure regulator {The upper and lower jig unit of the fuel pressure regulator}

1 is an assembled perspective view of a fuel pressure regulator used in an automobile fuel pump before the pressure setting for one embodiment of the present invention;

2a and 2b is a state in which the pressure setting is made to the regulator of Figure 1 and its cross-sectional state,

3 is an external perspective view of a pressure regulator using a pressurizing and fixing jig unit for a pressure regulator of a fuel pressure regulator according to the present invention;

Figure 4 is an external perspective view of only the upper pressurizing portion operated for the regulator pressure setting in Figure 3,

5 is an exploded perspective view of the upper pressing portion,

6 is a cross-sectional view taken along the line B-B of FIG.

7 is an enlarged view of part C of FIG. 6;

8 is a perspective view taken only the lower fixing jig in FIG.

9 is an exploded perspective view of each part of FIG. 8;

10 is a cross-sectional view taken along the line D-D of FIG. 8;

11 is a state in which the regulator is mounted on the pressurizing and fixing jig unit according to the present invention.

※ Brief description of symbols for the main parts of the drawings

5: regulator 6: upper housing

7: Lower housing 8,9: Fuel entrance

10 valve 11 diaphragm

12: valve stem 13: compression spring

15: spring press section 30: pressure regulator

31: main body 32: drive unit

34: moving guide portion 35: controller portion

40: pressurization portion 41: slider housing

41a: First shot spring 41b: rock plate

42: slider 42a: sliding contact

42b: spring seat 43: collet chuck movement and fixing means

44: second round spring 45: guide shaft

46: Punch 47: Collet Chuck

47a: screwing portion 47b: cutting portion

48: release means regulator 49: release pusher

49a: third bullet spring 49b: moving groove

49c: Fixing screw 49d: Through hole

50: Chuck fixing nut 51: Bush

53: Chuck Housing 54: Chuck Guider

The present invention relates to a pressurizing and stationary jig unit for a pressure regulator of a fuel pressure regulator, and more particularly, a number average type of a regulator seated on a stationary jig when the upper pressure part is lowered to form a regulator in the pressure regulator of the fuel pressure regulator. It is related to the pressure regulator of the pressure regulator of the fuel pressure regulator and the jig unit of the fuel pressure regulator to maintain a stable as well as to provide a collet at the bottom of the upper pressing portion to form a spring pressing portion at the correct position during the punch pressing.

The present invention generally relates to a pressurizing and fixed jig unit for a pressure regulator for forming a fuel pressure regulator for supplying fuel to a engine at a constant pressure in a fuel tank of a fuel supply device of an internal combustion engine.

In general, the fuel pressure regulator, which belongs to the fuel device of the internal combustion engine, serves as a fuel pressure regulating valve that maintains a constant pressure of the fuel supplied to the engine so that the fuel is combusted while maintaining an ideal mix with air inside the engine. If the pressure of the fuel supplied is higher than the reference value, the flow rate corresponding to the pressure exceeding the reference value is returned to the fuel tank so that a uniform pressure is always maintained in the fuel supply pipe, thereby maintaining a theoretical fuel ratio in which an appropriate amount of fuel and air are mixed. Make sure

One assembled embodiment of such a fuel pressure regulator is shown in Figure 1, Figure 2a shows a state in which the pressure setting to form a spring pressing portion in the upper housing of the assembled regulator, Figure 2b shows its cross-sectional state It is shown.

As shown in the figure, a conventional fuel pressure regulator 5 is composed of an upper housing 6 and a lower housing 7, and the entrance and exit of the fuel inlet and discharge on the lower and one side of the lower housing (7) (8) and (9) are provided, and inside the upper and lower housings (8) and (9), a valve (10) is formed to serve as an inlet and outlet of oil, and the diaphragm (11) is formed on the upper surface of the valve (10). The provided valve stem 12 is provided, and the upper surface of the valve stem 12 is composed of a high elastic compression spring 13 is assembled to be integrally assembled.

In the fuel pressure regulator 5 configured as described above, a spring pressing part 15 is formed at the upper end of the upper housing 6 using a predetermined pressure setting device as shown in FIG. 2A.

When the spring pressing unit 15 is formed, the compression spring 13 inside the housing is compressed to pressurize the valve stem 12, and the upper surface of the valve 10 is sealed according to the pressurization of the valve stem 12 to fuel the fuel. The fuel supplied from the supply pipe is configured to be introduced.

However, if the pressure rise occurs when the supply pressure of the fuel supplied to the fuel supply pipe exceeds a certain reference pressure, the valve stem 12 blocking the valve 10 is lifted to exceed the reference value of the fuel supply pressure. As the flow rate is introduced, the hydraulic pressure in the fuel supply pipe is maintained to maintain the reference pressure. Therefore, the pressing force of the compression spring set to maintain a constant balance with the inside of the fuel supply pipe of the engine to be used is generated in proportion to the depth of the spring pressing portion recessed to a certain depth outside the upper housing.

As a result, the depth of the spring pressing portion 15 formed in the upper housing 6 determines the opening / closing pressure of the valve generated in the compression spring (when the performance of the remaining components is the same condition) to the engine or vehicle to be used. Therefore, the pressure setting of the spring pressing portion formed in the regulator is very important.

In this way, the assembled fuel pressure regulator 5 is pressurized so that the compression force of the compression spring 13 is maintained at a constant balance with the hydraulic pressure in the fuel supply pipe so that the valve stem 12 is opened when the fuel is normally supplied to the engine. If the fuel pressure inside the fuel supply pipe exceeds the reference pressure, the valve stem 12 is opened and the flow rate above the reference pressure flows out so that the internal pressure of the fuel supply pipe can always be maintained at the optimum flow rate and hydraulic pressure. When processing the fuel pressure regulator, it is important to press the depth of the spring pressing portion formed in the upper housing so as to pressurize the compression spring provided therein (hereinafter referred to as 'pressure setting').

The pressure regulator is used to form a spring presser in such a fuel pressure regulator, and the present invention is applied to a pressurizing part which is actually operated to form a spring presser on the regulator and a unit of a fixing jig which fixes the regulator when pressurized. It is about.

The regulator of the conventional fuel pressure regulator is a regulator in which the upper punch is fixed while forming a lower jig for fixing the regulator to fix the regulator on the upper part of the regulator so that the lower load housing part of the regulator is fitted to the upper end of the lower jig. The pressure setting was made by lowering the upper part of the spring to the set depth, but the regulator fixed to the lower fixing jig was shaken when contacting the punch part at the moment when the punch part was pressed on the upper part of the regulator. It was difficult to form the spring pressing portion in the position was a disadvantage that a large number of defective products are generated.

The present invention is devised to solve the problems of the pressure regulator of the conventional fuel pressure regulator, the present invention is to maintain a fixed position during the punching the pressure setting regulator while the fuel pressure regulator having a uniform quality It is an object of the present invention to provide a pressurizing and supporting portion structure of a pressure regulator for a fuel pressure regulator that can be set.

In order to achieve the above object, the pressure and support portion structure of the pressure regulator for the fuel pressure regulator according to the present invention is a support portion provided with a mounting jig for fixing the fuel pressure regulator vertically above the main body, and the support portion and the vertical It is made up of a pressing part which is installed above the main body to move up and down by the driving unit so that the central axis is matched, wherein the pressing part is made of a hollow type having a predetermined inner diameter and a moving guide part installed in front of the main body on the outer one side. A slider housing connected to the elevator housing; A guide shaft which is provided at upper and lower ends, respectively, and which is fitted inside the slider housing to be lowered together when the slider housing descends; A slider which is fitted to an outer circumference of the guide shaft so as to be slidable up and down inside the slider housing and is fixed by a roll plate; A ball spring installed on the outer periphery of the guide shaft at the upper end of the slider to press the slider downward when the slider moves upward; A punch having a predetermined length having a predetermined pressure portion formed at a lower end thereof and a top end fixedly installed at a lower end of the guide shaft to punch the regulator fixed on the fixing jig; It consists of a characteristic structure consisting of; a collet chuck and a collet chuck fixing means which is fixed to the lower end of the slider to fix the regulator to prevent the flow of the regulator when punching through the center of the punch to the regulator.

In particular, the collet chuck fixing means is fixed to the lower end of the slider made of a hollow so that the guide shaft and the punch can be reciprocated in the inner side is provided with a tanbal spring inside, the lower end of the tanbal spring threaded portion inside A chuck housing into which the formed bush and nut are inserted and installed; Chuck guider is connected to the lower end of the chuck housing to prevent the bush and nut from being separated to the lower end of the chuck housing; wherein the collet chuck is screwed into the inner circumference of the bush and nut installed in the chuck housing The screw coupling portion is formed on the outer periphery of the upper end, and the lower end portion has a characteristic structure in which several cutting portions are cut in the vertical direction to facilitate the fitting on the outer periphery of the regulator.

In the description of the configuration of the present invention will not be described in detail the overall configuration or structure of the pressure regulator for the fuel pressure regulator (hereinafter referred to as 'regulator') applied to the present invention will be described only the schematic configuration of each part, The structure of the pressurizing portion and the supporting portion of the regulator, which is a feature of the present invention, will be described in detail.

3 shows an embodiment of the regulator pressure regulator 30 to which the embodiment of the present invention is applied, and is usually configured to supply the regulator to the main body automatically or manually, but for a regulator to which the embodiment of the present invention is applied. The pressure regulator 30 has a pressurizing part 40 having a structure in which the pressure regulator 30 moves up and down in accordance with the operation of the driving part 32 provided with the servomotor installed above the main body 31, and the vertical movement of the pressure adjusting part 40. Supporting portion 60 is installed on the upper surface of the main body 31 on the center line and the controller portion 35 for controlling the command for performing a series of operations to the pressing portion 40 and the supporting portion 60. Is made of a structure provided in the upper rear of the main body 31, the front of the main body 31 may be provided with a transfer unit for automatically transferring and discharging the regulator to the main body 31, although not shown in the figure .

The present invention has a structure of a regulator fixing support portion 60 provided above the main body 31 among the various components constituting the pressure regulator, and an upper pressing portion 40 which is a pressure setting device for forming a spring pressing portion in the regulator. It will be described in detail below with respect to the characteristic structure of the present invention.

4 to 7 show only the configuration of each part by extracting only the configuration of the upper pressing portion 40 in FIG. 3, and FIGS. 8 to 10 illustrate the configuration and structure of the lower support portion 60. .

First, the configuration and structure of the upper pressing portion 40 will be described in detail with reference to FIGS. 4 to 7.

Figure 4 is installed above the main body 31 while being lowered by the control of the drive unit 32 while pressing the regulator seated on the support portion 60 at a constant speed and pressure to form a spring pressing portion above the regulator Only 40 is shown separated from the pressure regulator, Figure 5 shows the separation of each part to make it easier to see its configuration.

Box portion of the pressing unit 40 according to the present invention is made of a hollow having a predetermined inner diameter and connected to the moving guide portion 34 installed in front of the main body 31 on the outer side of the box-shaped slider housing ( 41); Fixing parts 54a and 54b are provided at upper and lower ends, respectively, and guide shafts 45 having a predetermined length are fitted to the inner side of the slider housing 41 so as to lower together when the slider housing 41 is lowered; Slider is fitted to the outer periphery of the guide shaft 45 to be slidable up and down inside the slider housing 41 and fixed to be prevented from being separated by the lock plate (41b) coupled to the bottom of the slider housing 41 ( 42); A first shot spring 41a installed at an upper end of the slider 42 at an upper circumference of the guide shaft 45 and installed to press the slider 42 downward by the compression force when the slider housing 41 descends; In order to punch the regulator fixed on the support portion 60, a predetermined pressing portion 46a is formed at the lower end, and an upper end portion is provided with a fixing portion 46b fixed to the lower end of the guide shaft 45. A punch 46 of constant length; Collet chuck movement and fixing means 43 and collet chuck movement fixed to the lower end of the slider 42 to fix the regulator to prevent the flow of the regulator when the punch 46 penetrates through the center thereof to the regulator and It consists of; a collet chuck 47 is installed inside the fixing means.

Particularly, the slider 42 has a larger outer diameter than the upper end and the lower end in the center portion of the body portion that is inserted into the slider housing 41 and slides, so that the slider 42 contacts the inner circumference of the slider housing 41 during lifting. 42a is formed to have a structure in which a predetermined step is formed at upper and lower ends of the sliding contact portion 42a, and the first bullet shot installed inside the slider housing 41 in the body portion formed at the upper end of the sliding contact portion 42a. The slider 41 is lowered by the spring 41a and the repulsive force thereof. The lower end of the sliding contact 42a is coupled to the bottom of the slider housing 41 so that the slider 42 is moved to the slider housing. A lock plate 41b is installed to hold the slider 42 so that the slider 42 is not detached from the valve 41.

In addition, the collet chuck movement and fixing means 43 is fixed to the lower end of the slider 42, as shown in the partially enlarged cross-sectional view of Figure 7 so that the guide shaft 45 and the punch 46 therein It is made of a hollow so as to reciprocate and is provided with a second ball spring 44 inside, the lower end of the second ball spring 44, the threaded portion is formed on the inside of the bush 51 coupled to the collet chuck 47 And the chuck fixing nut 50 is inserted into the chuck housing 53 is installed; The bush 51 and the chuck fixing nut 50 is connected to the lower end of the chuck housing 53 to prevent the chuck housing 53 from being separated to the lower end of the chuck housing 53;

In addition, the collet chuck 47 is a screw coupling portion 47a of a predetermined length on the outer periphery of the upper end so as to be screwed into the inner circumference of the bush 51 and the chuck fixing nut 50 installed in the chuck housing 53 In the lower part, several cutting parts 47b are formed in the vertical direction so as to be easily fitted to the outer periphery of the regulator, and a predetermined concave groove 47c is processed at the lower periphery of the predetermined height at the lower end. The radially open contact with the upper housing of the regulator is made of a structure that can be easily fitted to the outer peripheral side of the regulator, the outer peripheral surface of the front end of the collet chuck 47 of the bottom of the concave groove (47c) is the chuck guider (54) The inclined portion (47d) is formed in close contact with the inclined surface (54a) formed on the inner circumferential surface of the collet chuck to gradually expand or narrow the inner diameter of the lower end of the collet chuck. Consists of a structure.

The chuck guider 54 is configured to naturally collapse when the collet chuck 47 enters the inside, and a predetermined inclined surface 54a is formed at the lower inner circumference of the collet chuck 47 so as to naturally expand when the collet chuck 47 enters the inclined surface. Between the 54a and the outermost outer surface is formed a fitting groove penetrated a predetermined depth from the lower end to the upper side is configured so that the release pusher 49 can be fitted.

In addition, the lower end of the chuck guider 54 is provided with a regulator detachment means 48 for automatically detaching the regulator fitted to the collet chuck 47 when the pressure unit 40 is lowered and raised. 48 is a predetermined moving groove 49b is machined on the side to be movable up and down a certain range from the bottom of the chuck guider 54 is fitted into the inner circumference of the chuck guider 54 and then fixedly fixed with a fixing screw 49c. A release pusher 49 having a through hole 49d having a size to which the upper housing of the regulator can be fitted; A third shot spring (49a) installed at an upper end of the release pusher (49) inside the chuck guider (57) to automatically descend the release pusher (49); Consists of

On the other hand, with reference to Figures 8 to 10 will be described in detail with respect to the structure and configuration of the support portion of the present invention.

FIG. 8 illustrates an exterior and an internal perspective view of the supporting part 60 fixedly installed on the upper surface of the main body, and FIG. 9 is separated to illustrate each configuration of the supporting part 60 shown in FIG. 8. have.

As shown in the figure, the supporting part 60 according to the present invention is a fixing part (60a) provided with several fixing holes (60b) for fixing to the upper surface of the main body 31, and the fixing part (60a) Protruding a certain height in the center of the upper surface of the cylindrical to form a mounting jig 61 formed with a fitting portion (61a) to a predetermined depth to fix the regulator in the center, and to be fixed to fit the upper surface of the mounting jig 61 The mounting guide 63 is formed in a disc shape, but the regulator fitting portion 63a having the same shape as the mounting jig 61 is formed on one side.

As shown in FIG. 9, the seating guide 63 is fitted into a plurality of fixing holes 64 formed inside the seating jig 61, and has a cylindrical shape in which a locking jaw 66 having a predetermined height is formed at the outer circumference of the body. A fixing screw 69 is fixed to an upper end of the bush 65 of the bush 65, and a coil compression spring 67 having a predetermined length is built into the lower end of the bush 65, and the plurality of coil compression springs 67 are seated. The bottom of the mounting jig 61 is fixedly installed inside the jig 61, and a joint 68 formed in a shape that simultaneously supports both coil compression springs 67 is coupled to the upper end of the mounting jig 61. Mounting guide 63 is coupled to be configured to be elastically supported when mounting the regulator mounted on the upper, the coupling state thereof is shown in FIG.

Hereinafter will be described the operation and effects of the pressure and support portion for the regulator pressure regulator according to the present invention made of the above-described configuration and structure.

The upper pressing portion 40 according to the present invention is a lifting operation according to the control signal of the drive unit configured separately on the upper end, the first regulator is required to be transferred to the support portion of the upper surface of the main body in the fixed state outside The slider housing, which is a housing, is moved downward according to a movement guide part provided on one side of the main body.

The lowering motion of the slider housing pushes down the slider fixedly installed inside the slide housing with the repulsive force generated as the first resilient spring installed therein corresponds to the falling height of the slider housing.

As the slider descends, the chuck housing and chuck guider coupled to the bottom of the slider are lowered, and the upper housing of the regulator fixed to the support part enters into the central through hole of the release pusher, which is a separation prevention means of the regulator coupled to the bottom of the chuck guider. The release pusher, which is in contact with the seating guide of the supporting part, enters the inside of the chuck guider according to the pressing force, and naturally fits into the outer housing outer periphery of the upper housing of the collet chuck regulator which is pressed by the second bullet spring inside the chuck guider housing. Lose.

Meanwhile, the lowering of the slider housing simultaneously lowers the guide shaft vertically installed therein, and the shaft coupled to the lower end of the slider housing is lowered by the same height so that the upper surface of the regulator is temporarily fixed by the collet chuck. Punching with a constant pressing force in the center forms a spring pressing part in the regulator.

As the slider housing descends, the pressurizing part which forms the spring pressing part on the upper surface of the regulator is raised again. At this time, the lower end of the pressurizing part, that is, the pusher, which is coupled to the lower part of the chuck guider, is provided inside the chuck guider and is compressed. It is separated from the supporting part by pushing out the regulator that has been inserted into the collet chuck by the extension force of the collet chuck and leaving the regulator in the mounting state of the supporting part for the first time.

Therefore, the regulator remaining in the supporting part is discharged after undergoing a predetermined hydraulic pressure and flow rate test in that state, or discharged so that the pressure and flow rate test can be performed by a separate device to complete a series of pressure setting processes for the regulator. .

The pressurizing and supporting portion structure for the pressure regulator of the regulator according to the present invention having the above-described configuration and structure has a collet chuck provided at the lower portion of the pressing portion at the time of pressurization before punching the outer housing outer periphery of the regulator fixed to the upper surface of the supporting portion. Since the punch is lowered and the spring press part is formed on the upper housing after the catch, the spring press part can be formed at the exact position of the upper part of the regulator during the punching operation after lowering, so that the uniform product can be produced. This makes it possible to significantly reduce the production of poorly-formed regulators by shaking, thereby improving productivity while reducing manufacturing costs.

In particular, when the pressurizing part is pressurized, the seating jig upper surface of the supporting part is provided with a seating guide which is operated by the inner compression coil spring to support the regulator, thereby absorbing the instantaneous impact of the punch while the punch is in contact with the regulator. It is structured so that the contact between the punch and the regulator is smoothly connected, so that the flow and noise of the device is reduced so that the work is performed in a quiet environment.

As described above, the pressurizing and supporting portion structure for the pressure regulator of the fuel pressure regulator according to the present invention is not only quietly moved up and down by the servo motor, but also the punching operation is performed after clamping the regulator during punching of the regulator. By forming the spring presser, it is possible not only to reduce the defective rate of the product but also to improve the productivity, and to improve the safety of the worker at work.

Claims (4)

delete A supporting part 60 having a seating jig 61 for vertically fixing the fuel pressure regulator upwardly of the main body; The slider housing 41 which is installed above the main body so that the support part 60 and the vertical center axis coincide with each other and is moved up and down by the driving unit 32, and a guide shaft 45 that is fitted inside the slider housing 41. A slider 42 fitted to an outer circumference of the guide shaft 45 to be fixed to be slidable up and down inside the slider housing 41; and an outer circumference of the guide shaft 45 at an upper end of the slider 42. When the slider housing 41 is lowered, the first bullet spring 41a, which pushes the slider 42 downward, is fitted with a predetermined pressure portion at the lower end, and the upper end is fixedly installed at the lower end of the guide shaft 45. A predetermined length of the punch 46, the collet chuck movement and fixing means 43 and the collet chuck 47 fixed to the lower end of the slider 42 in order to prevent the flow of the regulator when the punch 46 is lowered Including pressurization In the pressure and support portion structure of the pressure regulator for fuel pressure regulator provided with; A mounting guide 63 for inducing an alignment state of the regulator is installed on an upper surface of the mounting jig 61 of the support part 60, and an upper portion of the joint 68 coupled to the bottom surface of the mounting jig 61. A plurality of compression springs 67 are installed therein, a bush 65 having a predetermined length is installed at an upper end of the compression spring 67, and the bush 65 exposed to the upper surface of the seating jig 61. The seating guide 63 is made of a screw fixed structure on the upper surface of the, The collet chuck movement and fixing means 43 is fixedly installed at the lower end of the slider 42 so that the guide shaft 45 and the punch 46 can be reciprocated from the inside thereof and have a second bullet inside thereof. A chuck housing 53 having a spring 44 and a lower end of the second bullet spring 44 inserted therein with a bush 51 and a chuck fixing nut 50 formed therein; And the chuck guider 54 connected to the lower end of the chuck housing 53 to prevent the bush 51 and the chuck fixing nut 50 from escaping to the lower end of the chuck housing 53. The collet chuck 47 is a screw engaging portion 47a is formed on the upper outer periphery so as to be screwed into the inner circumference of the bush 51 and the chuck fixing nut 50 installed in the chuck housing 53, the lower end portion A pressurizing and supporting portion structure of a pressure regulator for a fuel pressure regulator, characterized in that the cutting portion (47b) is cut in the vertical direction so that the inner diameter is elastically adjusted, and the outer surface is formed in a tapered shape of which the diameter is increased downward. The method of claim 2, The chuck guider 54 has a structure in which an inclined surface 54a in which a lower inner circumferential surface thereof is symmetrical to an outer circumference of the collet chuck 47 is formed so that the inner diameter of the collet chuck 47 is naturally stretched when the collet chuck 47 enters and exits. Pressure and support structure of the pressure regulator for the fuel pressure regulator, characterized in that consisting of. The method of claim 3, The lower end of the chuck guider 54 is provided with a regulator detachment means 48 for automatically detaching the regulator fitted to the collet chuck 47 when the pressurizing portion 40 is raised and lowered, The regulator detachment means 48 has a predetermined moving groove 49b on the side thereof so as to be movable in a predetermined range up and down in the lower portion of the chuck guider 54, and then fits into the inner circumference of the chuck guider 54 and then has a fixing screw 49c. A release pusher (49) having a through hole (49d) of a size that can be fixedly installed at the center thereof and to which the upper housing of the regulator can be fitted; Fuel pressure regulator, characterized in that consisting of; the third bullet spring (49a) is installed on the upper end of the release pusher (49) in the inner side of the chuck guider (54) to achieve the automatic descending of the release pusher (49). Pressure and support structure of pressure regulator.

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