JP4460107B2 - Control valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control valve used, for example, in an automatic transmission for automobiles.
[0002]
[Prior art]
Conventionally, control valves have been used for hydraulic control of automobile automatic transmissions in automobiles. This type of control valve is a collective valve equipped with multiple types of valves. In general, a plurality of divided valve bodies formed by die casting are overlapped and formed in advance on the joint surface of each valve body. In general, an oil passage is formed by the grooves.
[0003]
FIG. 4 is a cross-sectional view of an essential part showing an example of such a control valve. The valve body 1 is overlapped with a separate plate 2 interposed therebetween, and the first valve body 4 and the second valve body 2 connected to each other by a bolt 3 The valve body 5 has a hierarchical structure. A plurality of grooves 6 are respectively formed on the coupling surface side of the first and second valve bodies 4 and 5, and these are closed by the separate plate 2, thereby securing an oil passage in the valve body 1. . A valve chamber 7 communicating with the groove 6 is opened on the outer peripheral surface of the first valve body 4. A spool 8 and a return spring 9 are accommodated in the valve chamber 7, and these are inserted into the first valve body 4 on the opening side of the valve chamber 7 by a retaining plate 10 that crosses the valve chamber 7. The escape from the valve chamber 7 is prevented. The retaining plate 10 is a metal plate having one end portion 10a bent in a substantially L shape, and the one end portion 10a is accommodated between the coupling surface side of the first valve body 4 and the separation plate 2. This prevents the first valve body 4 from falling off.
[0004]
The spool 8 switches the flow of hydraulic oil in the valve chamber 7 by moving due to the balance between the axial thrust applied to the pressure receiving portion (land portion) by the hydraulic pressure and the spring load of the return spring 9. In the illustrated control valve, a hydraulic control valve 11 is constituted by a valve body 1 (first valve body 4), a spool 8, a return spring 9, and a retaining plate 10.
[0005]
[Problems to be solved by the invention]
However, in the control valve described above, the retaining plate 10 cannot be easily removed after it is assembled once. For this reason, for the purpose of ensuring high control characteristics for the control valve, a count part is set in the accommodating parts such as the return spring 9 in the valve chamber 7 to adjust the hydraulic control characteristics in the assembled state. When the return spring 9 and the like are appropriately replaced as necessary, the replacement work is complicated and workability is poor.
[0006]
Of course, in order to facilitate such replacement work, for example, as shown in FIG. 5, the retaining plate 10 may be attached to the valve body 1 from the surface side of the first valve body. There was a problem like this. That is, a dedicated part for preventing the retaining plate 10 from dropping off after assembly is newly required, and the cost of the control valve becomes high. Further, in order to avoid the addition of a dedicated part, as shown in FIG. 5, a drop-off prevention part 101 for the retaining plate 10 is provided in the counterpart part 100 such as an AT case on the vehicle body side where the control valve is assembled. However, in this case, there is a problem that it is impossible to prevent the retaining plate 10 from falling off during the conveyance before the control valve is assembled to the vehicle body.
[0007]
The present invention has been made in view of such a conventional problem, and it is easy to replace parts housed in the valve chamber, and it is possible to reliably prevent the holding member from falling off during shipping without incurring high costs. An object of the present invention is to provide a control valve that can be used.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention of claim 1, a control valve having a plurality of valves including a specific valve, wherein the specific valve is shared with other valves, A housing part housed in a valve chamber that opens to the valve body; and a holding member that is attached to the opening side of the valve chamber and prevents the housing part from coming out of the valve chamber. In a control valve that is exchanged as necessary in an inspection process of control characteristics, the specific valve is a part of the valve body that constitutes the control valve and contacts an oil strainer that is assembled to the valve body after the inspection process. as well as disposed, the holding member, the valve body from the oil strainer opposite to the surface side Ri attached, the exit from the valve body of the holding member, the movement in the opening direction of the holding member and to those prevented by preventing by the oil strainer.
[0009]
In such a configuration, in the pressure control characteristic inspection process, the holding member can be detached and attached by setting the oil strainer in a non-assembled state, and by assembling the oil strainer after the inspection process, The oil strainer in the assembled state reliably prevents the holding member from falling off the valve body.
[0010]
Further, in the invention of claim 2, wherein the valve body is also of a that pass connecting the valve chamber of each valve.
[0011]
In such a configuration, an oil strainer that can be assembled to the valve body after the inspection process can be shared with other control valves having valve bodies of different shapes.
[0012]
In the invention of claim 3, the valve body has a hierarchical structure composed of a plurality of members, and the specific valve is arranged in a layer of the valve body on the side where the oil strainer is attached. It was.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view taken along the line AA of FIG. 2, showing the main part of the control valve according to the present invention.
[0015]
This control valve is used for hydraulic control of an automatic transmission for automobiles, similar to the one shown in the prior art. The control valve is overlapped with a separate plate 2 and is connected to each other by a bolt 3. The valve body 1 is composed of a valve body 4 and a second valve body 5.
[0016]
Also in the present embodiment, a valve chamber 7 that opens to the outer periphery is provided at a predetermined location of the first valve body 4, and a spool 8 and a return spring 9 are accommodated therein, and these hold the present invention. The retaining plate 10 which is a member prevents the first valve body 4 from coming off, and thereby a hydraulic control valve 11 is configured. The hydraulic control valve 11 is a specific valve in the present invention. In the inspection process of the pressure control characteristic after the assembly of the control valve, a return spring 9 is prepared in advance as necessary, as described in the prior art. The control characteristics of the control valve can be adjusted by replacing it with other count parts. The retaining plate 10 is inserted from the surface side of the first valve body 4 so as to cross the valve chamber 7, and the one end 10 a is exposed to the surface side of the first valve body 4, thereby 1 can be inserted and removed on the surface side of the valve body 4.
[0017]
Further, on the surface side of the first valve body 4, as shown in FIG. 3, an oil strainer 15 and a solenoid assembly 16 constituting a plurality of electromagnetic valves together with the first valve body 4. It is assembled. The oil strainer 15 is a member for removing dust and the like contained in the hydraulic oil when the hydraulic oil supplied to the hydraulic circuit in the valve body 1 is pumped from the oil pan when the control valve is used. That is, the oil strainer 15 is a component that can be assembled to the valve body 1 (first valve body 4) after the above-described pressure control characteristic inspection process. The harnesses 17 extending from each of the solenoid assemblies 16 are grouped into one, and a connector 18 having a plurality of connection terminals corresponding to each harness 17 is provided at the distal end portion thereof. Yes. On the other hand, the hydraulic control valve 11 described above is disposed at the mounting position of the oil strainer 15 as shown in FIG. As a result, the retaining plate 10 is prevented from moving by a certain amount or more in the drawing direction (see FIG. 1) by contacting the oil strainer 15. That is, the disconnection from the first valve body 4 is prevented.
[0018]
In the control valve having the above configuration, in the pressure control characteristic inspection process for adjusting the hydraulic control characteristic in the assembled state, the retaining plate 10 can be inserted / removed alone by leaving the oil strainer 15 in a non-assembled state. it can. Therefore, even when the return spring 9 needs to be replaced in the inspection process, the replacement work can be easily performed, and the cost can be reduced by improving the work efficiency. Moreover, the oil strainer 15 is assembled after the inspection process is completed, thereby reliably preventing the retaining plate 10 from dropping from the valve body 1 (first valve body 4) during the shipment of the control valve. Can do. Therefore, it is not necessary to add a new part only to prevent the retaining plate 10 from falling off, and this can also reduce the cost.
[0019]
In this embodiment, the oil retaining plate 15 attached to the first valve body 4 side prevents the retaining plate 10 from falling off. However, the control valve is configured and the valve body is formed after the inspection step. As long as it is a component that can be assembled to 1, the retaining plate 10 may be prevented from falling off by other components. For example, when a harness clip for fixing the harness 17 of the solenoid assembly 16... Described above is fixed to the first valve body 4, the harness clip is used to prevent the harness clip. Also good. In addition, when the oil strainer 15 is assembled to the valve body 1, a gap exists between the lower surface of the oil strainer 15 and the one end 10 a of the retaining plate 10. A configuration that does not occur may be used.
[0020]
Further, since the position of the hydraulic control valve 11 in the first valve body 4 is set in advance to the mounting position of the oil strainer 15, the oil strainer 15 prevents the retaining plate 10 from coming off. The oil strainer 15 can be shared between the above-described one and another control valve having a different valve body 1 shape. Therefore, even when a design change occurs in the control valve, the oil strainer 15 can be used as it is, so that the cost required for the design change of the control valve can be minimized.
[0021]
In the present embodiment, the control valve that adjusts the hydraulic control characteristics by exchanging the return spring 9 in the assembled state has been described. However, the control valve that is adjusted by exchanging the spool 8 or the inside of the valve chamber 7 is described. In the configuration in which other housing parts such as spacers are present, the same effects as in the present embodiment can be obtained even if the housing parts are replaced. The same applies to the case where the hydraulic control valve 11 has a poppet type valve element other than the spool 8. In addition, the valve body 1 has a hierarchical structure constituted by the first valve body 4 and the second valve body 5, but the valve body 1 is a single member having no hierarchical structure. The same effect can be obtained by using the present invention in a certain control valve.
[0022]
【The invention's effect】
As described above, in the present invention, since the holding member can be attached and detached independently in the inspection process of the pressure control characteristic, it is easy to replace the storage parts accommodated in the valve chamber in the inspection process. It becomes. As a result, it is possible to reduce costs by improving work efficiency. Moreover, since the specific oil strainer in the assembled state surely prevents the holding member from falling off the valve body during shipping, other parts for preventing the dropout are provided on the control valve. This is unnecessary, and it is possible to reliably prevent the holding member from falling off during shipping without incurring high costs.
[0023]
In addition, an oil strainer that can be assembled to the valve body after the inspection process can be shared with other control valves having valve bodies that form different pressure circuits. Therefore, even when the design change occurs in the control valve, the cost required for it can be minimized.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view taken along the line AA of FIG. 2 showing an embodiment of the present invention.
FIG. 2 is a plan view of an essential part of a control valve showing a state in which a part of an oil strainer is cut open.
FIG. 3 is an exploded perspective view showing a schematic configuration of a control valve.
FIG. 4 is a cross-sectional view of a main part of a control valve showing a conventional technique.
FIG. 5 is a cross-sectional view of a main part of a control valve showing another conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Valve body 4 1st valve body 5 2nd valve body 7 Valve chamber 8 Spool (accommodating part)
9 Return spring (accommodating parts)
10 Retaining plate (holding member)
11 Hydraulic control valve (specific valve)
15 oil strainer

Claims (3)

A control valve having a plurality of valves including a specific valve, wherein the specific valve is shared with other valves, a receiving part accommodated in a valve chamber opened in the valve body, In a control valve that is attached to the opening side of the valve chamber and prevents the housing component from coming off from the valve chamber, and the housing component is replaced as necessary in the pressure control characteristic inspection process,
The specific valve is disposed at a location in the valve body that is in contact with an oil strainer that constitutes the control valve and is assembled to the valve body after the inspection step.
The holding member is attached to the valve body from the surface facing the oil strainer, and the oil strainer prevents the holding member from coming off from the valve body by the oil strainer. Control valve characterized by blocking. Control valve according to claim 1, wherein said valve body and wherein the Turkey to form a fluid path communicating the valve chamber of each valve. 3. The control valve according to claim 2, wherein the valve body has a hierarchical structure composed of a plurality of members, and the specific valve is disposed in a layer of the valve body on the side where the oil strainer is attached.

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