JPS6113785Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention Industrial Application Field The present invention includes a valve body having a cylinder, a valve spool slidably disposed within the cylinder, and a valve spool disposed within the cylinder at one end of the valve spool. This invention relates to an improvement in a spring adjustment device for a hydraulic control valve, which consists of a sleeve and a spring disposed between the sleeve and a valve spool, and is used, for example, in various hydraulic control valves in automatic transmissions of automobiles, etc. .

Prior Art Various hydraulic control valves in automatic transmissions are
In order to keep the valve performance constant, hydraulic pressure is applied to one end of the valve spool in the axial direction, and
Although a spring is applied to the other end in a direction opposite to the direction of hydraulic pressure, the pressing load from this spring can be applied as needed to different types of valves such as shift valves, regulator valves, modulator valves, etc. Or, even if the valve was the same, it had to be changed depending on the car model, and a spring adjustment device was required.

Generally, the pressing load of a spring is determined by the wire diameter, winding diameter, number of turns, and installation length of the spring. And if you want to change the pressing load,
All you have to do is change one of the four factors mentioned above, but changing the wire diameter, winding diameter, and number of turns must be done during the manufacturing process, so different valves and other parts are manufactured depending on the car model. Since it is troublesome to do so, a method is usually used to change the length of the spring to which it is attached as necessary.

However, as a conventional means of changing the installation length of a spring, the first method is to prepare a plurality of spacers in advance and insert the required number of spacers between the spring end face and the valve body (or sleeve) as necessary. Alternatively, a screw hole is formed in the valve body in advance, a screw member is screwed into the screw hole, and the installation length of the spring is determined by using the tip of the screw member or a sleeve that is locked at the tip. There is a second method of changing the intensity as necessary.

Problems to be solved by the invention However, in the first method described above, it is necessary to prepare several types of spacers, which not only increases the number of components, but also requires a lot of work to insert the required number of spacers. The second method is difficult to position by adjusting the screw to determine the installation length of the spring, and the screw member loosens after adjusting the screw, making the screw adjustment meaningless. There was a risk that it would happen.

Therefore, the technical object of the present invention is to solve the above-mentioned problems of the conventional technology and to provide a spring adjusting device for a hydraulic control valve that can be easily adjusted using simple components.

Technical means of the invention The technical means taken to solve the above technical problem consists of a cam that is placed on the opposite side of the sleeve from the spring and comes into contact with the sleeve, and a hole that passes through the cam. The cam consists of a pin attached to the valve body, the cam has a polygonal shape, and holes are provided so that there are at least two distances from each side of the polygon.

Effect: By using the above technical means, if the distance between each side of the cam and the hole is selected and the cam is assembled to the pin, the position of the sleeve is set according to the distance, so the installation length of the spring can be changed. This allows the pressing load of the spring to be changed as necessary.

Example Hereinafter, embodiments of the present invention will be explained using figures.

Valve body 3 of hydraulic control valve for automatic transmission
A valve spool 32 is inserted into one cylinder so as to be slidable in the axial direction, and a sleeve 36 is disposed at one end of the valve spool 32. A compression spring 34 is interposed between the sleeve 36 and the valve spool 32. The spring adjustment device consists of a cam 33 and a pin 35. Spring 3 against sleeve 36
A cam 33 is disposed on the opposite side from the sleeve 36 in contact with the sleeve 36. This cam 33 has a hole 33a and is fixed to the valve body 31 with a pin 35. The cam 33 has a regular hexagonal shape, and the hole 33
Since a is provided offset from the center of the regular hexagon, the distance between each side of the regular hexagon and the hole 33a can be set in two to six types.

Therefore, attach the cam 33 to the valve body 31 with the pin 35.
However, when fixing the sleeve 36 by selecting the distance between each side and the hole 33a, the sleeve 36 can be placed in the second position.
It can be set according to the cam position as shown by a solid line and a broken line in the figure, and the attachment length of the spring 34 can be varied, and as a result, the attachment load of the spring 34 can be varied.

Note that the shape of the cam 33 does not necessarily have to be a regular hexagon, and as long as it is a polygon of triangular or larger size, the distance between each side and the hole can be set to two or more types.

Effects of the invention As explained above, the present invention allows the mounting load of the spring to be easily adjusted by the combination of the polygonal cam and the pin, so there is no assembly error and the conventional spacer can be used as needed. Compared to the extremely troublesome work of sandwiching multiple sheets, this work is easier to do, and when adjusting with conventional screws, it is difficult to position the installation length of the spring, and it is difficult to adjust the length of the spring after adjusting the screws. Compared to the drawback that the screw means may become relatively loose, there is an advantage that once positioned, the cam is held by the pressing force of the pin and spring and will not loosen.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a hydraulic control valve according to the present invention, FIG. 2 is a view of a spring adjusting device which is the main part of the present invention, and FIG. 3 is a plan view of FIG. 2. 31... Valve body, 32... Valve spool, 33... Cam, 33a... Hole, 34... Spring, 35... Pin, 36... Sleeve.

Claims (1)

[Scope of utility model registration request] A valve body having a cylinder, a valve spool slidably disposed within the cylinder, a sleeve disposed within the cylinder at one end of the valve spool, and a spring disposed between the sleeve and the valve spool. A hydraulic control valve spring adjustment device comprising: a cam disposed on the opposite side of the sleeve from the spring and abutting the sleeve; a pin passing through a hole provided in the cam and attached to the valve body; A spring adjusting device for a hydraulic control valve, wherein the cam has a polygonal shape, and the holes are provided so as to have at least two different distances from each side of the polygon.