JPS6347312Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Subject of the Invention] The present invention is arranged between a sleeve and a valve that controls communication between an input port and a drain port to regulate fluid pressure at the input port. The present invention relates to an improvement in a sleeve stop mechanism of a regulator valve device having a spring that biases in a direction and an appropriate number of shims disposed between the spring and the sleeve to adjust the biasing force of the spring.

[Application field of this invention]

The above-mentioned regulator valve device can adjust and control the fluid pressure in a proportional relationship to the throttle pressure by applying the throttle pressure of the vehicle in the same direction as the spring. It can be used as a device to obtain operating pressure to operate the brake or clutch of an aircraft.

[Prior art]

Conventionally, the sleeve of the above-mentioned regulator valve device has a stop mechanism that is located close to the end surface of the sleeve on the inner surface of the bore of the valve body in which the valve and the sleeve are disposed, which is opposite to the surface where the spring is locked. It has been known to provide an annular groove in the sleeve, and to prevent the sleeve from coming off with a snap spring that is fitted into the annular groove.

[Problems with conventional technology and their technical analysis]

In this conventional method, when a snap ring is fitted into an annular groove, the diameter of the elastic snap ring is reduced against the elastic force, and after the snap ring is fitted into the annular groove, the snap spring is fitted into the groove by the elastic force. When removing the sleeve to replace the shim, etc., it is troublesome to remove and install the snap spring that positions the sleeve.
In particular, there was a problem in that special tools were required.

[Technical issues]

Therefore, the technical object of the present invention is to enable easy removal and attachment of the sleeve for shim replacement without using any special tools.

[Technical means]

The technical measures taken to solve the above technical problems include a valve body having a hole formed on the side opposite to the assembly surface of the valve body, and one end of a spring disposed within the valve body that biases the valve engaged. The sleeve is provided with a protrusion formed on the opposite side of the end surface to be stopped, and a key whose upper end is disposed within the hole and whose lower end abuts against the protrusion, thereby positioning the sleeve.

[Effect of technical means]

The above technical means works as follows. That is, in the assembled state, the sleeve is urged by a spring to come into contact with a key whose lower end is brought into contact with the protrusion, and this key has its upper end pressed into the hole formed in the upper valve body. The sleeve is biased against the upper valve wall defining this hole because it is located within the upper valve body, and the sleeve is eventually positioned relative to the upper valve body via the key. When removing the sleeve when replacing the shim, move the sleeve against the spring by a distance equal to the length of the protrusion, and the key can be easily removed from the hole. When the upper end of the key is placed in the hole after being pushed in, the sleeve is easily moved to a predetermined position by the biasing force of the spring and is held in a predetermined position via the key.

[Special effects produced by the present invention]

The present invention produces the following unique effects. In other words, with conventional snap springs, an annular groove for attaching the snap spring must be machined on the inner surface of the bore of the valve body, but this groove machining is difficult to process and form at the same time as forming the body, so cutting, etc. However, in the present invention, since the hole is provided in a position close to the outer cross section of the sleeve of the valve body, it has the advantage that it can be integrally formed when molding the valve body.

[Example] Hereinafter, an example of the above technical means will be explained using figures. In the explanatory text, up, down, left, and right refer to the directions in FIG.

The upper valve body 1, which is assembled to the assembly surface on the lower valve body 31 via the gasket 28, plate 29, and gasket 30, has a large diameter bore 2 and a small diameter bore 3 coaxially arranged from the left side opening. Further, on the lower valve body 31 side of the upper valve body 1, there are a first oil passage 4 and a second oil passage 5 that communicate with the large diameter bore 2, and on the small diameter bore 3, there is a first oil passage that connects to the inlet port. An oil chamber 6, a second oil chamber 7 and a third oil chamber 8 connected to the drain port are provided. A valve 11 is inserted into the small diameter bore 3, and a sleeve 21 is inserted into the large diameter bore 2. A large-diameter bore 23 and a small-diameter bore 22 are coaxially provided in the sleeve 21 from the right side opening, and the sleeve 21 has a second oil passage 32 and a first oil passage 33 that communicate each bore to the outer circumferential side of the sleeve 21. established,
These oil passages are attached to Atsupa Valve Body 1 in the assembled state.
It communicates with the second oil passage 5 and the first oil passage 4, respectively. A plunger 18 having a large diameter flange 19 and a small diameter flange 20 is inserted into the sleeve 21,
A small oil chamber 32 is formed by the small diameter flange 20 and the small diameter bore 22.
A large oil chamber 36 is formed by the large diameter flange 19 and the large diameter bore 23. Further, a protrusion 25 is provided on the left end surface 24 of the sleeve 21, which is opposite to the end surface on which a spring 16, which will be described later, is engaged. The valve 11 has a first flange 39, a second flange 12, and a third flange 37, and the first flange 39
The third flange 37 is in contact with the small diameter bore 3, and the second flange 12 is located in the first oil chamber 6. This valve 11 has a rod 15 on the left side of the first flange 39, which abuts against the plunger 18. Further, between the left end surface 14 of the first flange 39 of the valve 11 and the opening end surface 34 of the sleeve 21,
Adjustment shim 1 arranged on this opening end face 34
A spring 16 is disposed via 7. A through hole 10 leading to the bore 2 is provided at the upper part near the left side opening of the Atsupa valve body 1 and on the opposite side from the lower valve body 31. A key 26 is arranged so as to be in contact with the key 26. That is, the upper end of the key 26 is disposed within the hole 10, and the lower end abuts against the protrusion to position the sleeve 21. On the left side of this key 26 is a step 27 that fits inside the large diameter bore 2.
is formed, thereby preventing the key 26 from jumping out of the upper valve body 1.

In this embodiment with the above configuration, some of the oil supplied to the first oil chamber 6 from the oil pump (not shown) enters the third oil chamber 8 through the orifice (not shown), and also enters the third oil chamber 8 through the orifice (not shown). Through the valve action achieved by the flange 12 and the seat 38 formed on the upper valve body 1, the oil is discharged through the second oil chamber 7 to a drain (not shown). The amount of oil discharged to the drain is controlled by the second valve 11.
The gap between the flange 12 and the seat 38 is also limited. Therefore, the set value of the fluid pressure adjusted by this valve device is determined by the rightward biasing force of the spring 16 that biases the valve 11 to the right and the third oil chamber that biases the valve 11 to the left. The pressure value is in balance with the oil pressure of 8. However, maintaining this setting value may result in dimensional errors of each component or the spring 16.
This is difficult due to spring stiffness errors, and the pressure value in the balanced state varies among individual valve devices. An appropriate number of shims 1 are placed between the sleeve 21 and the spring 16 to adjust this pressure value to the set value.
7, thereby adjusting the biasing force of the spring 16. To make this adjustment, first push the sleeve 21 to the right from the left opening of the Atsupa valve body 1 by a distance approximately equal to the length of the step 27 of the key 26 against the spring, and move it upward or inward of the hole 10. Remove the key 26. Next, attach the sleeve 21 to the shim 1
7. Pull out the plunger together with the plunger 18 from the left side opening.
Thereafter, an appropriate number of shims 17 are inserted together with the sleeve 21 and plunger 18 from the left opening. Insert the key 26 into the upper side of the hole 10, press the sleeve 21, move it to the right, lower the key 26 until it touches the protrusion 25, and then stop pressing the sleeve 21. As a result, the step 27 of the key 26 is placed within the large diameter bore 2, and the key 26 is prevented from slipping out upward.

The operation of the plunger 18 is such that when the shift position of the vehicle automatic transmission is other than reverse, the throttle pressure passes through the second oil passage 5 and the second oil passage 32 to the small oil chamber 3.
5 and is supplied to the valve 11 via the plunger 18.
is biased in the same direction as the biasing force of the spring, thereby increasing the fluid pressure adjustment setting value. When the shift position is reverse, the throttle pressure is switched to the first oil passage 4 by a mechanism (not shown), is supplied to the large oil chamber 36 through the first oil passage 33, and operates the large diameter flange 19 and the small diameter flange 20. The valve 11 is urged to the right via the plunger 18 with the urging force increased by the area ratio, and as a result, the adjustment setting value is further increased.

[Brief explanation of the drawing]

FIG. 1 is an explanatory sectional view of an embodiment showing the technical means of the present invention, and FIG. 2 is a left side view of FIG. 1. 1...Atsupa valve body, 2...Large diameter bore,
3...Small diameter bore, 11...Valve, 16...Spring, 17...Shim, 18...Plunger, 2
1...Sleeve, 25...Protrusion, 26...Key, 27...Step, 28, 30...Gasket,
29...Plate, 31...Lower valve body.

Claims (1)

[Scope of utility model registration request] a bore provided in a valve body; a valve slidably disposed within the bore to control communication between an input port and a drain port to regulate fluid pressure at the input port; and a valve disposed within the valve body. A leg having a sleeve, a spring disposed between the sleeve and the valve and biasing the valve in one direction, and an appropriate number of shims disposed between the spring and the sleeve to adjust the biasing force of the spring. In the Yurator valve device, a hole formed on the valve on a side opposite to an assembly surface of the valve body, a protrusion formed on the sleeve on a side opposite to an end surface where the spring is locked; and a sleeve locking mechanism for a regulator valve device having a key having an upper end disposed within the hole and a lower end thereof abutting the protrusion, thereby positioning the sleeve.