CN103062465B - Pressure adjusting screw mechanism and pressure control valve - Google Patents
Pressure adjusting screw mechanism and pressure control valve Download PDFInfo
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- CN103062465B CN103062465B CN201210393654.6A CN201210393654A CN103062465B CN 103062465 B CN103062465 B CN 103062465B CN 201210393654 A CN201210393654 A CN 201210393654A CN 103062465 B CN103062465 B CN 103062465B
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Abstract
The invention provides a pressure adjusting screw mechanism which can reduce the operation torque of an adjusting screw without increasing the lowest adjusting pressure of a valve. When the head (6a) of the adjusting screw (6) enters into a cylinder (51), and head (6a) is pressed against a hollow part (31) of a spring support part (3) on the screw side. When the head (6a) leaves the cylinder (51), the wall of a locking groove (6b) is locked on a stepped face (35) of the hollow part (31).
Description
Technical field
The present invention relates to tension adjusting screw mechanism and the pressure controlled valve of such as reduction valve etc.
Background technique
At present, as tension adjusting screw mechanism, as shown in Figure 6, comprising: housing 105; Spring 108, this spring 108 is configured in above-mentioned housing 105; First spring support 101 and the second spring support 102, this first spring support 101 and the second spring support 102 are configured at the two ends of spring 108 in above-mentioned housing 105; And adjusting screw 103, this adjusting screw 103 is fixed on above-mentioned first spring support 101 (with reference to Japanese Patent Laid-Open 8-253125 publication: patent documentation 1).
Above-mentioned adjusting screw 103 screws togather with the tapped hole 105a of above-mentioned housing 105, by screwing out in adjusting screw 103 precession housing 105 or in housing 105, carrys out the compressive force via the first spring support 101 Regulation spring 108.The compressive force of this spring 108 is passed to guiding valve 104 via the second spring support 104.That is, adjusting screw 103 Regulation spring 108 puts on the active force of guiding valve 104.
But in above-mentioned existing tension adjusting screw mechanism, adjusting screw 103 and the first spring support 101 are fixed together, and therefore, when screwing or unclamp adjusting screw 103, the first spring support 101 is followed the rotation of adjusting screw 103 and rotates
Now, produce frictional force because of the above-mentioned seat surface of the first spring support 101 and the end contact of above-mentioned spring 108, in addition, the O shape ring 106 also because embedding the outer circumferential face of the first spring support 101 contacts with the inner peripheral surface of housing 105 and produces frictional force.
In addition, overcoming above-mentioned frictional force makes adjusting screw 103 rotate the operation torque of the moment formation adjusting screw 103 of required power.Therefore, the operation torque that there is adjusting screw 103 becomes large problem.
Patent documentation 1: Japanese Patent Laid-Open 8-253125 publication
Summary of the invention
Therefore, technical problem of the present invention is to provide a kind of tension adjusting screw mechanism and pressure controlled valve, and the minimum adjustment pressure that valve need not improve in this tension adjusting screw mechanism just can reduce the operation torque of adjusting screw.
In order to solve the problems of the technologies described above, the feature of tension adjusting screw mechanism of the present invention comprises: cylindrical shell, and this cylindrical shell has screw thread in the side of axis; Cap, the threads of this cap and above-mentioned cylindrical shell, and at center, there is tapped hole; Spring, this spring is configured in above-mentioned cylindrical shell; Spring support, one end of above-mentioned spring is supported to by this spring support can axially retreat above-mentioned and have sealing component in periphery, and sealing component seals between above-mentioned spring support and the inner peripheral surface of above-mentioned cylindrical shell; And adjusting screw, the tapped hole of this adjusting screw and above-mentioned cap screws togather, and above-mentioned spring support is axially retreated above-mentioned, and to regulate the elastic force of above-mentioned spring, above-mentioned adjusting screw comprises: screw body, and the screw hole of this screw body and above-mentioned cap screws togather; Head; And locking groove, this locking groove is between above-mentioned head and above-mentioned screw body, above-mentioned spring support comprises: hollow portion, above-mentioned head inserts this hollow portion in the mode that can rotate freely, and when above-mentioned head moves towards above-mentioned axial opposite side, above-mentioned head can abut with above-mentioned hollow portion, on the other hand, when above-mentioned head moves towards above-mentioned axial side, the wall of above-mentioned locking groove can be locking with above-mentioned hollow portion; And patchhole, this patchhole makes above-mentioned hollow portion and ft connection, and inserts for above-mentioned locking groove.
According to tension adjusting screw mechanism of the present invention, when above-mentioned spring will be increased put on the active force of spool, adjusting screw is made to move with the inside by its precession cylindrical shell towards above-mentioned axial opposite side, and utilize this adjusting screw to press spring support, to utilize this spring support by pressing spring.Now, because the head of adjusting screw contacts with the hollow portion of spring support in the mode that can rotate freely, and press spring support, therefore, spring support can not be followed the rotation of adjusting screw and rotate.By this, when screwing adjusting screw, excessive running torque can not be produced on spring support, the operation torque that adjusting screw is rotated can be reduced.
On the other hand, when above-mentioned spring will be reduced put on the active force of spool, make adjusting screw move to be screwed out its inside from cylindrical shell towards above-mentioned axial side, thus reduce spring support to the pressing force of spring.Now, the wall of the locking groove of adjusting screw and the hollow portion of spring support locking, spring support follows adjusting screw, therefore, spring support and adjusting screw can be retracted.By this, when unclamping above-mentioned adjusting screw, spring support retracts by overcome friction, thus energy retracting spring load completely, and the minimum adjustment pressure of valve can be reduced fully.
In addition, in the tension adjusting screw mechanism of a mode of execution, above-mentioned hollow portion forms the discoideus space concentric with the inner peripheral surface of above-mentioned cylindrical shell, and above-mentioned patchhole is the circular hole relative to above-mentioned hollow portion bias.
According to the tension adjusting screw mechanism of this mode of execution, above-mentioned hollow portion forms the discoideus space concentric with the inner peripheral surface of above-mentioned cylindrical shell, above-mentioned patchhole is the circular hole relative to above-mentioned hollow portion bias, therefore, the step surface locking with the locking groove of adjusting screw of hollow portion is made up of the step between the inner peripheral surface of hollow portion and the inner peripheral surface of patchhole.Like this, the locking strutcture between hollow portion and the locking groove of adjusting screw can be produced simply.
In addition, when the wall and above-mentioned hollow portion that will make the above-mentioned locking groove of above-mentioned adjusting screw are locking, head can be inserted hollow portion from patchhole, and make head mobile towards reverse-biased heart side (side contrary with eccentric side) in hollow portion, locking with the wall and hollow portion that make locking groove, thus easily can carry out the locking operation of locking groove towards hollow portion.
In addition, in the tension adjusting screw mechanism of a mode of execution, above-mentioned hollow portion forms the space of the position extending beyond center from the periphery of above-mentioned spring support, and above-mentioned patchhole forms the slit of the position extending beyond center from the periphery of above-mentioned spring support.
According to the tension adjusting screw mechanism of this mode of execution, above-mentioned hollow portion forms the space of the position extending beyond center from the periphery of above-mentioned spring support, above-mentioned patchhole forms the slit of the position extending beyond center from the periphery of above-mentioned spring support, therefore, the step surface locking with the locking groove of adjusting screw of hollow portion is made up of the step between the inner peripheral surface of hollow portion and the inner peripheral surface of patchhole.Like this, the locking strutcture between hollow portion and the locking groove of adjusting screw can be produced simply.
In addition, when the wall and above-mentioned hollow portion that will make the above-mentioned locking groove of above-mentioned adjusting screw are locking, head and locking groove can be inserted hollow portion and patchhole from the periphery of spring support, locking with the wall and hollow portion that make locking groove, thus easily can carry out the locking operation of wall towards hollow portion of locking groove.
In addition, in the pressure controlled valve of a mode of execution, comprising: spool; And to the above-mentioned tension adjusting screw mechanism that the pressure that above-mentioned spool controls regulates.
According to the pressure controlled valve of this mode of execution, owing to having above-mentioned tension adjusting screw mechanism, therefore, the minimum adjustment pressure of valve need not be improved, just can reduce the operation torque of adjusting screw.
According to tension adjusting screw mechanism of the present invention, above-mentioned spring support has above-mentioned hollow portion and above-mentioned patchhole, therefore, need not improve the minimum adjustment pressure of valve, just can reduce the operation torque of adjusting screw.
According to pressure controlled valve of the present invention, owing to having above-mentioned tension adjusting screw mechanism, therefore, the minimum adjustment pressure of valve need not be improved, just can reduce the operation torque of adjusting screw.
Accompanying drawing explanation
Fig. 1 is the sectional view of the pressure controlled valve comprising tension adjusting screw mechanism of the present invention.
Fig. 2 is the plan view of adjusting screw.
Fig. 3 A is the side view of spring support.
Fig. 3 B is the sectional view of spring support.
The major component enlarged view of Tu4Shi tension adjusting screw mechanism.
Fig. 5 A is the side view of another spring support.
Fig. 5 B is the sectional view of another spring support.
Fig. 6 is the sectional view of existing tension adjusting screw mechanism.
(symbol description)
1 main part
3,3A spring support
31,31A hollow portion
32,32A patchhole
35,35A step surface
51 cylindrical shells (stopper)
52 caps (acorn nut)
52a tapped hole
6 adjusting screw
6a head
6b locking groove
6c screw body
8 sealing components (O shape ring)
17 spools (guiding valve)
41 first springs
42 second springs
P1 port
P2 secondary port
Z tension adjusting screw mechanism
Embodiment
Below, according to illustrated mode of execution, the present invention will be described in detail.
(the first mode of execution)
Fig. 1 represents the sectional view of the pressure controlled valve comprising tension adjusting screw mechanism of the present invention.As an example of this pressure controlled valve, show direct acting type reduction valve.As shown in Figure 1, pressure controlled valve comprises: the main part 1 with a port P1 and secondary port P2; Be contained in aforementioned body portion 1 and the spool 17 of closedown will be opened between a port P1 and secondary port P2; And to the tension adjusting screw mechanism Z that the pressure that above-mentioned spool 17 controls regulates.Below, tension adjusting screw mechanism Z side (being left side in figure) is set to front side or side, and main part 1 side (being right side in figure) is set to rear side or opposite side.
There is in the inside in aforementioned body portion 1 valve chamber 12 and guide chamber 14.This valve chamber 12 has: the first annular slot 15 be communicated with port P1; And the second annular slot 16 to be communicated with secondary port P2.The spring housing 13 of tension adjusting screw mechanism Z is communicated with the side (front side) of valve chamber 12, and above-mentioned guide chamber 14 is communicated with the opposite side (rear side) of valve chamber 12.
The circular hole 21b of the space 21a that above-mentioned guide chamber 14 is formed by using stopper 21 to be sealed by the circular hole 20 of main part 1 rear end and stopper 21 front end is formed.Above-mentioned space 21a is communicated with via the radial passage 21c being located at stopper 21 with above-mentioned circular hole 21b.Above-mentioned space 21a is communicated with secondary port P2 via the axial passageway 22 in aforementioned body portion 1.
Above-mentioned spool 17 is guiding valve as an example, and it has the first sliding plate 17a in front end, has the second sliding plate 17d in rear end, and between above-mentioned first sliding plate 17a and above-mentioned second sliding plate 17d, have the first middle sliding plate 17b and the second middle sliding plate 17c.First middle sliding plate 17b is positioned at the front of the second middle sliding plate 17c.
Above-mentioned first sliding plate 17a and above-mentioned second sliding plate 17d is chimeric with valve chamber 12 in the mode that can be free to slide.Above-mentioned first middle sliding plate 17b opens closedown by between a port P1 and secondary port P2.When the rear end of spool 17 abuts with the front end of stopper 21, based on the first middle sliding plate 17b a port P1 and secondary port P2 between aperture be in maximum opening.
Above-mentioned spool 17 has the sluicing path 29 that axle wherein extends.This sluicing path 29 has the first opening 29a in the front of the first sliding plate 17a, and has the second opening 29b between the second middle sliding plate 17c and the second sliding plate 17d.First opening 29a is communicated with spring housing 13, and spring housing 13 is communicated with the case port T being located at aforementioned body portion 1 via not shown path.
Above-mentioned tension adjusting screw mechanism Z has: at the threaded cylindrical shell 51 of the side tool of axis; With the cap 52 of the threads of cylindrical shell 51; Be configured at the first spring 41 and the second spring 42 of cylindrical shell 51 inside; Be configured at valve side spring support 2 and the screw side spring support 3 of cylindrical shell 51 inside; And the adjusting screw 6 to screw togather with the tapped hole 52a of cap 52.
Above-mentioned cylindrical shell 51 is stopper as an example, and cap 52 screws togather with one end (front end) of cylindrical shell 51, and the front end of main part 1 and the other end (rear end) of cylindrical shell 51 screw togather.The above-mentioned spring housing 13 of Inner Constitution of cylindrical shell 51.Cap 52 is acorn nut as an example, has tapped hole 52a at the center of cap 52.
Above-mentioned valve side spring support 2 and above-mentioned screw side spring support 3 can move freely along the axle of cylindrical shell 51, and are configured at the inside of cylindrical shell 51.Valve side spring support 2 is configured at than screw side spring support 3 more by the position of main part 1 side (rear).Ball 24 is chimeric with the rear surface of valve side spring support 2, and valve side spring support 2 is abutted with the front end of spool 17 by this ball 24.
Above-mentioned first spring 41 and above-mentioned second spring 42 are configured between valve side spring support 2 and screw side spring support 3.First spring 41 and the spool 17 of the second spring 42 to the second end (rearward end) side being configured at cylindrical shell 51 exert a force.
Above-mentioned first spring 41 is the main pressure adjusting springs exerted a force towards guide chamber 14 pairs of spools 17.Above-mentioned second spring 42 is secondary secondary springs that spring constant is less than the spring constant of the first spring 41.Detailed structure and the action of the first spring 41, second spring 42 are disclosed in Japanese Patent Laid-Open 8-253125 publication.
Above-mentioned second spring 42 is configured at the inner side of above-mentioned first spring 41.Second spring 42 contacts with minor diameter part 2b, this minor diameter part 2b step higher than the seat surface portion 2a contacted with the first spring 41 in valve side spring support 2.Second spring 42 contacts with minor diameter part 3b, this minor diameter part 3b step higher than the seat surface portion 3a contacted with the first spring 41 in screw side spring support 3.
Above-mentioned second spring 42 is configured between the minor diameter part 2b of valve side the spring support 2 and minor diameter part 3b of screw side spring support 3 with natural length, do not acting on each port P1, P2, T towards under the state of the pressure of atmosphere opening, spool 17 is exerted a force towards guide chamber 14, to utilize the first middle sliding plate 17b, a port P1 is opened into maximum opening with between secondary port P2.
Above-mentioned screw side spring support 3 is configured at the position more leaning on the first end side (front end) of cylindrical shell 51 than the first spring 41 and the second spring 42, and one end of the first spring 41 and the second spring 42 is supported to and can be retreated in the axial direction.Sealing component 8 is embedded with at the outer circumferential face of the seat surface portion 3a of screw side spring support 3.Sealing component 8 is O shape ring as an example, seals between the outer circumferential face of the seat surface portion 3a of screw side spring support 3 and the inner peripheral surface of cylindrical shell 51, with Packing spring room 13.
Above-mentioned adjusting screw 6 screws togather with the tapped hole 52a of cap 52, and retreats along the axle of cylindrical shell 51 at the internal freedom of cylindrical shell 51.Adjusting screw 6 makes screw side spring support 3 retreat in the axial direction, to regulate the elastic force of the first spring 41 and the second spring 42.That is, by the inside of adjusting screw 6 precession cylindrical shell 51 being increased the active force of the first spring 41 and the second spring 42, on the other hand, by adjusting screw 6 is screwed out from the inside of cylindrical shell 51 active force reducing the first spring 41 and the second spring 42.Adjusting screw 6 also screws togather with nut 28, unclamps from cap 52 to prevent it.
As depicted in figs. 1 and 2, above-mentioned adjusting screw 6 has: the screw body 6c screwed togather with the tapped hole 52a of cap 52; Head 6a; And the locking groove 6b between head 6a and screw body 6c.The diameter of head 6a is roughly the same with the diameter of screw body 6c, and the diameter of head 6a also can be less than the diameter of screw body 6c.The diameter of locking groove 6b than the diameter of head 6a and the diameter of screw body 6c little.The axial length of locking groove 6b is larger than the axial length of the patchhole 32 of screw side spring support 3, and the length obtained than being added with the axial length of the patchhole 32 of spring support 3 by the axial length of the tapped hole 52a of cap 52 is little.
As shown in Fig. 3 A and Fig. 3 B, above-mentioned screw side spring support 3 has: hollow portion 31; And the patchhole 32 to be communicated with this hollow portion 31.Hollow portion 31 and patchhole 32 are located at seat surface portion 3a.Hollow portion 31 is positioned at the position of inboard more more rearward than patchhole 32.The outer circumferential face of present facial 3a has all grooves 33 embedded for sealing component 8.
Above-mentioned hollow portion 31 forms discoideus space, and the center 31a of hollow portion 31 is concentric with the center (i.e. the center of spring support 3) of the inner peripheral surface of cylindrical shell 51.Above-mentioned patchhole 32 is circular holes, and the center 32a of patchhole 32 is equivalent to the distance of eccentric amount e relative to the center 31a bias of hollow portion 31.
The internal diameter of above-mentioned patchhole 32 is slightly larger than the external diameter of the head 6a of above-mentioned adjusting screw 6, less than the internal diameter of above-mentioned hollow portion 31.The inner peripheral surface by eccentric side of patchhole 32 is consistent with the inner peripheral surface of hollow portion 31.Between the inner peripheral surface and the inner peripheral surface by reverse-biased heart side (side contrary with eccentric side) of patchhole 32 of hollow portion 31, be provided with step surface 35, this step surface 35 forms the inwall of hollow portion 31.
As shown in Figure 4, the head 6a of above-mentioned adjusting screw 6 inserts in the hollow portion 31 of above-mentioned screw side spring support 3 in the mode that can rotate freely.In addition, when head 6a moves towards the opposite side of axis and enters the inside of cylindrical shell 51, head 6a can abut with hollow portion 31.On the other hand, when head 6a moves towards the side of axis and exits from the inside of cylindrical shell 51, the wall of locking groove 6b can be locking with the step surface 35 of hollow portion 31.In addition, the patchhole 32 of screw side spring support 3 makes hollow portion 31,31A and ft connection and inserts for locking groove 6b.
In other words, when above-mentioned adjusting screw 6 is linked with the mode that can rotate freely and above-mentioned screw side spring support 3, the head 6a of adjusting screw 6 is positioned at the hollow portion 31 of spring support 3, and the step surface 35 of the hollow portion 31 of the wall of the locking groove 6b of adjusting screw 6 and spring support 3 is locking.In addition, when adjusting screw 6 enters the inside of cylindrical shell 51, head 6a to contact with spring support 3 in the mode that can rotate freely and presses spring support 3.On the other hand, when adjusting screw 6 exits from the inside of cylindrical shell 51, the wall of locking groove 6b and the step surface 35 of hollow portion 31 locking, make spring support 3 follow adjusting screw 6.
Then, above-mentioned adjusting screw 6 is described with the linking method of above-mentioned screw side spring support 3, first, adjusting screw 6 and cap 52 is screwed togather, and head 6a and locking groove 6b is given prominence to from cap 52.In this condition, head 6a is inserted hollow portion 31 from patchhole 32.In addition, head 6a is moved in hollow portion 31 towards step surface 35 side, to make the step surface 35 of the wall of locking groove 6b and hollow portion 31 locking.Then, making, under locking groove 6b and the locking state of hollow portion 31, spring support 3 to be inserted the inside of cylindrical shell 51, while make cap 52 and cylindrical shell 51 screw togather.
According to the tension adjusting screw mechanism Z of said structure, when above-mentioned spring 41,42 will be increased put on the active force of spool 17, by the inside of adjusting screw 6 precession cylindrical shell 51, and utilize this adjusting screw 6 to press screw side spring support 3, to utilize this spring support 3 by pressing spring 41,42.Now, because the head 6a of adjusting screw 6 contacts with spring support 3 in the mode that can rotate freely, and press spring support 3, therefore, spring support 3 can not be followed the rotation of adjusting screw 6 and rotate.
By this, when screwing above-mentioned adjusting screw 6, excessive running torque can not be produced on screw side spring support 3, the operation torque that adjusting screw 6 is rotated can be reduced.Specifically, in the present invention, as shown in Figure 4, the operation torque of adjusting screw 6 is the moment obtained after adjusting screw 6 being multiplied with the distance A initial from the axle of adjusting screw 6 with the frictional force at the contacting part P place of spring support 3.Therefore, the operation torque of adjusting screw 6 is less.
On the other hand, in the prior art, as shown in Figure 6, frictional force is produced because of the seat surface of the first spring support 101 and the end contact of spring 108, in addition, O shape ring 106 also because embedding the outer circumferential face of the first spring support 101 contacts with the inner peripheral surface of housing 105 and produces frictional force, and, larger than above-mentioned distance A of the present invention from the distance of axle to producing the position of above-mentioned frictional force of adjusting screw 103.Therefore, in the prior art, the operation torque of adjusting screw 103 is very large.
On the other hand, in the present invention, when above-mentioned spring 41,42 will be reduced put on the active force of spool 17, the inside of adjusting screw 6 from cylindrical shell 51 is screwed out, to reduce the pressing force of screw side spring support 3 pairs of springs 41,42.Now, the step surface 35 of the wall of the locking groove 6b of adjusting screw 6 and the hollow portion 31 of spring support 3 is locking, and spring support 3 follows adjusting screw 6, therefore, spring support 3 and adjusting screw 6 can be retracted.
By this, when unclamping above-mentioned adjusting screw 6, screw side spring support 3 retracts by the frictional force overcoming sealing component 8, thus energy retracting spring load completely, and the minimum adjustment pressure of valve can be reduced fully.
On the other hand, as comparative example, the situation by the first spring support 101 in conventional example shown in Fig. 6 and adjusting screw 103 simple separation can be considered.When unclamping adjusting screw 103, produce frictional force because the O shape ring 106 embedding the outer circumferential face of the first spring support 101 contacts with the inner peripheral surface of housing 105, therefore, the first spring support 101 does not follow adjusting screw 103.Therefore, load on spring can not be completely released, and can remain a part, thus there is the unfavorable condition that fully can not reduce the minimum adjustment pressure of valve.
In addition, according to the present invention, above-mentioned screw side spring support 3 arranges hollow portion 31 and the patchhole 32 relative to this hollow portion 31 bias, the step surface 35 of the hollow portion 31 locking with the locking groove 6b of adjusting screw 6 is made up of the step between the inner peripheral surface of hollow portion 31 and the inner peripheral surface of patchhole 32, therefore, the locking strutcture between the locking groove 6b that can produce hollow portion 31 and adjusting screw 6 simply.
In addition, when the wall and above-mentioned hollow portion 31 that will make the above-mentioned locking groove 6b of above-mentioned adjusting screw 6 are locking, head 6a can be inserted hollow portion 31 from patchhole 32, and head 6a is moved towards reverse-biased heart side in hollow portion 31, with make the wall of locking groove 6b and hollow portion 31 locking, thus easily can carry out the locking operation of locking groove 6b towards hollow portion 31.
In addition, according to the pressure controlled valve of said structure, owing to having above-mentioned tension adjusting screw mechanism Z, therefore, the minimum adjustment pressure of valve need not be improved, just can reduce the operation torque of adjusting screw 6.
(the second mode of execution)
Fig. 5 A and Fig. 5 B represents the second mode of execution of the spring support of tension adjusting screw mechanism of the present invention.Be with the difference of above-mentioned first mode of execution, in this second embodiment, the hollow portion of screw side spring support is different with the shape of patchhole.
As fig. 5 a and fig. 5b, screw side spring support 3A has: the hollow portion 31A of U-shaped incision-like; And the patchhole 32A of the U-shaped incision-like to be communicated with this hollow portion 31A.Hollow portion 31A forms the space of the position extending beyond center from the periphery of spring support 3A, and patchhole 32A is the slit of the position extending beyond center from the periphery of spring support 3A.In addition, spring support 3A has all groove 33A that confession (Fig. 1's) sealing component 8 embeds.
The width of above-mentioned hollow portion 31A is slightly larger than the external diameter of the head 6a of adjusting screw 6, and the width of above-mentioned patchhole 32A is slightly larger than the external diameter of the locking groove 6b of adjusting screw 6.Between the internal surface and the internal surface of patchhole 32A of hollow portion 31A, be provided with step surface 35A, this step surface 35A forms the inwall of hollow portion 31A.
In addition, above-mentioned adjusting screw 6 is as follows with the linking method of above-mentioned screw side spring support 3A: inserted from the otch side of hollow portion 31A by head 6a, while locking groove 6b is inserted from the otch side of patchhole 32A, make the step surface 35A of the wall of locking groove 6b and hollow portion 31A locking, adjusting screw 6 to be linked with spring support 3A.Like this, the locking operation of adjusting screw 6 and spring support 3A can easily be carried out.
According to the tension adjusting screw mechanism of said structure, screw side spring support 3A arranges hollow portion 31A and the patchhole 32A of slit-shaped, the step surface 35A of the hollow portion 31A locking with the locking groove 6b of adjusting screw 6 is made up of the step between the inner peripheral surface of hollow portion 31A and the inner peripheral surface of patchhole 32, therefore, the locking strutcture between the locking groove 6b that can produce hollow portion 31A and adjusting screw 6 simply.
In addition, the present invention is not limited to above-mentioned mode of execution.Such as, also various combination can be carried out to each characteristic point of above-mentioned first mode of execution and above-mentioned second mode of execution.
In addition, as pressure controlled valve, except reduction valve, also can be relief valve (safety valve), sequence valve, back pressure valve, unloading valve etc.
In addition, if can abut when the head of adjusting screw enters the inside of cylindrical shell, and can be locking with the wall of locking groove when head exits from the inside of cylindrical shell, then the hollow portion shape of spring support also can be arbitrary shape.In addition, if hollow portion and ft connection can be made also to insert for locking groove, then the shape of the patchhole of spring support also can be arbitrary shape.
In addition, also can increase or reduce the quantity of spring.That is, also can omit the second spring and only adopt this root spring of the first spring, or, also can adopt the spring of more than three.In addition, also handle can be set in adjusting screw.In addition, the structure of valve side spring support is not limited to this mode of execution.In addition, also can omit valve side spring support, such as, use the lip part being integrally fixed on spool front end to replace valve side spring support.
Claims (2)
1. a tension adjusting screw mechanism, is characterized in that, comprising:
Cylindrical shell (51), this cylindrical shell (51) has screw thread in the side of axis;
Cap (52), the threads of this cap (52) and described cylindrical shell (51), and there is at center tapped hole (52a);
Spring (41,42), this spring (41,42) is configured in described cylindrical shell (51);
Spring support (3,3A), one end of described spring (41,42) is supported to by this spring support (3,3A) can axially retreat described and have sealing component (8) in periphery, and sealing component (8) seals between described spring support (3,3A) and the inner peripheral surface of described cylindrical shell (51); And
Adjusting screw (6), this adjusting screw (6) screws togather with the tapped hole (52a) of described cap (52), and described spring support (3,3A) is axially retreated described, to regulate the elastic force of described spring (41,42)
Described adjusting screw (6) comprising:
Screw body (6c), this screw body (6c) screws togather with the tapped hole (52a) of described cap (52);
Head (6a); And
Locking groove (6b), this locking groove (6b) is positioned between described head (6a) and described screw body (6c),
Described spring support (3,3A) comprising:
Hollow portion (31,31A), described head (6a) inserts this hollow portion (31,31A) in the mode that can rotate freely, and when described head (6a) moves towards described axial opposite side, described head (6a) can abut with described hollow portion (31,31A), on the other hand, when described head (6a) moves towards described axial side, the wall of described locking groove (6b) can be locking with described hollow portion (31,31A); And
Patchhole (32,32A), this patchhole (32,32A) makes described hollow portion (31,31A) and ft connection, and inserts for described locking groove (6b),
Described hollow portion (31) forms the discoideus space concentric with the inner peripheral surface of described cylindrical shell (51),
Described patchhole (32) is relative to the eccentric circular hole of described hollow portion (31).
2. a pressure controlled valve, is characterized in that, comprising:
Spool (17); And
The tension adjusting screw mechanism (Z) according to claim 1 that the pressure controlled described spool (17) regulates.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-228675 | 2011-10-18 | ||
| JP2011228675A JP5375921B2 (en) | 2011-10-18 | 2011-10-18 | Pressure adjusting screw mechanism and pressure control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103062465A CN103062465A (en) | 2013-04-24 |
| CN103062465B true CN103062465B (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210393654.6A Active CN103062465B (en) | 2011-10-18 | 2012-10-16 | Pressure adjusting screw mechanism and pressure control valve |
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| Country | Link |
|---|---|
| JP (1) | JP5375921B2 (en) |
| CN (1) | CN103062465B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI623439B (en) * | 2017-05-19 | 2018-05-11 | 致伸科技股份有限公司 | Thermo sensitive printer |
| CN107387828A (en) * | 2017-09-04 | 2017-11-24 | 东莞市旭欧精密五金制品有限公司 | A kind of Depressure valve |
| US11097389B2 (en) * | 2018-01-19 | 2021-08-24 | Vektek Llc | In-port sequence valve |
| DE202018102401U1 (en) | 2018-04-30 | 2019-07-31 | Neoperl Gmbh | Valve actuator |
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| CN201487235U (en) * | 2009-08-17 | 2010-05-26 | 费斯托(中国)有限公司 | Throttling valve |
| CN101749465A (en) * | 2008-12-02 | 2010-06-23 | 上海宇航系统工程研究所 | Double-valve seat pressure-reducing valve |
| CN201672118U (en) * | 2010-05-07 | 2010-12-15 | 常州市汇丰船舶附件制造有限公司 | High pressure gas pressure reducer valve |
| CN201687709U (en) * | 2010-06-08 | 2010-12-29 | 南通市红星空压机配件制造有限公司 | Energy-saving inverse proportion valve |
| CN201884739U (en) * | 2010-11-24 | 2011-06-29 | 广东联塑科技实业有限公司 | Adjustable plastic pressure-reducing valve with double springs |
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| JPH0895644A (en) * | 1994-09-26 | 1996-04-12 | Shimadzu Corp | Pressure control valve |
| JPH08253125A (en) * | 1995-03-20 | 1996-10-01 | Daikin Ind Ltd | Direct acting pressure reducing valve |
| JPH10246348A (en) * | 1997-03-06 | 1998-09-14 | Fuji Koki Corp | Pressure regulating valve |
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| CN2274270Y (en) * | 1996-07-11 | 1998-02-11 | 宗绪伦 | Pressure reducer for gas cylinder |
| JP3561198B2 (en) * | 2000-01-18 | 2004-09-02 | 矢崎総業株式会社 | Pressure regulator |
| CN201212575Y (en) * | 2008-07-09 | 2009-03-25 | 王晓平 | Pilot double-piston high differential pressure reducing valve |
| CN101749465A (en) * | 2008-12-02 | 2010-06-23 | 上海宇航系统工程研究所 | Double-valve seat pressure-reducing valve |
| CN101625043A (en) * | 2009-08-13 | 2010-01-13 | 凯迈（洛阳）气源有限公司 | High-pressure reducing valve |
| CN201487235U (en) * | 2009-08-17 | 2010-05-26 | 费斯托(中国)有限公司 | Throttling valve |
| CN201672118U (en) * | 2010-05-07 | 2010-12-15 | 常州市汇丰船舶附件制造有限公司 | High pressure gas pressure reducer valve |
| CN201687709U (en) * | 2010-06-08 | 2010-12-29 | 南通市红星空压机配件制造有限公司 | Energy-saving inverse proportion valve |
| CN201884739U (en) * | 2010-11-24 | 2011-06-29 | 广东联塑科技实业有限公司 | Adjustable plastic pressure-reducing valve with double springs |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013089009A (en) | 2013-05-13 |
| CN103062465A (en) | 2013-04-24 |
| JP5375921B2 (en) | 2013-12-25 |
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