JPH06300028A - Wave washer - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a wave washer that is interposed between a fixed object and a fixed object to ensure elasticity in the thickness direction, and is inserted into an insertion opening having a corner R at a corner. In this case, the purpose is to ensure the positional accuracy without getting on the corner R. A peak portion 10a having a convex shape in the thickness direction and a valley portion 10b having a concave shape in the thickness direction are alternately provided on each side of a hexagonal donut shape. Therefore, the peaks 10a and the valleys 10b have smaller diameters than the maximum outer diameter part 10 corresponding to the apex of the hexagon. When it is inserted into a circular insertion opening having the same diameter as the maximum outer diameter portion 10c, the maximum outer diameter portion 10c is regulated on the inner side surface of the insertion opening to ensure the positional accuracy in the plane direction. Further, even if the corner R is formed at the corner of the insertion opening, the valley portion 10b is not affected by the contact with the bottom surface of the insertion opening inside the corner R, and the positional accuracy in the thickness direction is reliably ensured. It

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wave washer, and more particularly to a wave washer which is interposed between a fixed object and a fixed object to secure elasticity in a thickness direction of a fixed portion.

[0002]

2. Description of the Related Art Conventionally, there has been widely used a structure in which a washer is interposed between a fixed object and an object to be fixed, and elasticity of the washer is ensured by a spring force of the washer. Further, as a washer suitable for ensuring elasticity in the thickness direction as described above, it has peak portions that are convex in the thickness direction and valley portions that are concave in the thickness direction alternately along its circumference. Wave washers are known.

[0003] For example, in Toyota Technology Publication No. 4657 issued by Toyota Motor Corporation (issued on September 30, 1992), a configuration in which a solenoid valve is mounted on a housing using a circular wave washer 1 as shown in FIG. 6 is disclosed. Has been done. Here, the wave washer 1 is shown in FIG.
As shown in (A), it is in the shape of a donut with the same diameter over the entire assembly, and each has three peaks 1a and valleys 1b.

Therefore, when the solenoid valve is fixed to the housing through the wave washer 1 as disclosed in the above-mentioned publication, the fixing portion is elastic due to the deformation of the peak portion 1a and the valley portion 1b of the wave washer 1. Exert.
Therefore, when a suitable pressing force is applied to the solenoid valve, the position where the solenoid valve is held can be displaced in the thickness direction of the wave washer 1.

Utilizing such characteristics, for example, the fixing member is inserted into a predetermined space formed by pressing the solenoid valve, and then the pressing member is released to sandwich the fixing member by the restoring force of the wave washer 1. Is possible. Such a mechanism enables easy and reliable assembly, and is effective in improving the assemblability of various parts.

[0006]

By the way, as an assembling mode of the wave washer 1, as shown in FIG.
As shown in (C), it may be arranged to intervene at the bottom of the insertion opening 3a provided in the housing 3 or the like. This structure has an insertion opening 3 provided in the housing 3 or the like.
The a is employed for the purpose of functioning as a guide when the object to be inserted such as the solenoid valve 2 is inserted, and as a support member after the insertion.

On the other hand, when the housing 3 or the like is provided with the insertion opening 3a by machining or the like, a corner R may be formed at the corner 3b due to processing restrictions. Therefore, when the wave washer 1 having substantially the same diameter as that of the insertion opening 3a is inserted into the insertion opening 3a, the wave washer 1 rides on the corner portion 3b as shown in FIG. 6B and reaches the bottom of the insertion opening 3a. The situation where it is not inserted occurs.

In this case, the insertion opening 3a is expected to function as a guide for the object to be inserted, as described above. Therefore, for example, it is not preferable in terms of processing economy to provide an escape groove in the corner portion 3b or to make the diameter of the wave washer 1 sufficiently smaller than the diameter of the insertion port 3a, and also to improve the positioning accuracy of the wave washer 1. It will worsen and should not be implemented.

Therefore, when the conventional wave washer 1 is used in a situation where the conventional wave washer 1 has to be used by being inserted into the insertion opening 3a where the corner R is formed in the corner 3b due to various restrictions, the object to be fixed is fixed. However, there was a problem in that the position could not be properly inserted, and the position accuracy in the height direction could not be secured.

The present invention has been made in view of the above points, and the diameter of the peak portion or the valley portion of the wave washer is made smaller than the maximum outer diameter portion, and the wave washer is formed inside the corner R formed at the corner portion. It is an object of the present invention to provide a wave washer capable of solving the above-mentioned problems by making a surface contact with a fixed object or a fixed object to prevent interference with the corner R.

[0011]

SUMMARY OF THE INVENTION The above object is to provide a wave washer alternately having convex peaks in the thickness direction and concave troughs in the thickness direction. This is achieved by a wave washer formed in a shape having an outer diameter smaller than the maximum outer diameter portion of the washer.

[0012]

In the wave washer according to the present invention, the peak portion and the valley portion act to secure elasticity in the thickness direction when the wave washer is interposed between the fixed object and the fixed object. At this time, the valley portion has a smaller diameter than the maximum outer diameter portion of the wave washer.

Therefore, the surface having the valley portion of the wave washer comes into surface contact with the fixed object or the fixed object inside the circle when the circle whose outer diameter is the diameter of the maximum outer diameter portion is assumed. Therefore, even if the corner R is formed on the fixed object or the object to be fixed along the above-described virtual circle, the valley portion does not interfere with the corner R thereof.

Since the maximum outer diameter portion of the wave washer is located away from the surface with which the valley portion contacts,
It is also separated from the corner R formed on that surface and is not affected by it at all.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the construction of a wave washer 10 which is an embodiment of the present invention. Here, the same figure (A)
Shows a perspective view thereof, FIG. 7B shows a front view thereof, and FIG. 7C shows a side view thereof.

As shown in each drawing, the wave washer 10 of this embodiment is formed into a hexagonal donut shape.
Then, the mountain portion 10a and the valley portion 1 are formed in the portions corresponding to the respective sides.
0b are alternately provided. Therefore, the maximum outer diameter portion 10c corresponding to the apex of the hexagon has peaks 10a and valleys 10a.
It will be located between b and.

Here, the wave washer 10 is constructed on the basis of a material having a predetermined elastic coefficient, and when it is interposed between the fixed object and the fixed object, the mountain portion when pressure is applied. 10a and the valley portion 10b exhibit appropriate elasticity by appropriately deforming according to the pressing force, and when the pressing force is released under such a condition, due to the restoring force, the fixed object and the fixed object are fixed. It exerts an appropriate spring force in the direction of widening the space between objects.

The effect based on the structure unique to the wave washer 10 of this embodiment will be described below with reference to FIG. 2. Prior to that, the usage of the wave washer 10 will be described together with the structure of a suitable application example. To do.

FIG. 3 shows a wave washer 10 of this embodiment.
Is applied to the assembly mechanism of the housing 11 and the solenoid valve 20. Here, this solenoid valve 20 is a valve that is suitable when it is arranged in a hydraulic path to control conduction of the hydraulic path, and FIG.
1 illustrates a case where a mechanism for controlling conduction between the hydraulic paths 12 and 13 provided in No. 1 is configured.

That is, the solenoid valve 20 axially displaces the needle 23 by an electromagnetic force generated when a predetermined current is passed through the coil 22 housed in the outer cylinder 21, and the displacement is utilized. The hydraulic oil passage 24 communicating between the hydraulic passages 12 and 13 is electrically connected or cut off.

Here, the solenoid valve 20 shown in FIG.
2 has an orifice 25 at one end of the hydraulic oil passage 24. The diameter of the orifice 25 is set so that a desired flow rate can be secured when the hydraulic oil passage 24 is in the conductive state, and the opening end is formed in a tapered shape.

At the tip of the above-mentioned needle 23, a ball valve 26 having an appropriate diameter fitted to the open end of the orifice 25 is installed. Therefore, when the current flowing through the coil 22 is appropriately controlled to shut off the hydraulic oil passage 24, the ball valve 26 is fitted into the tapered opening end 25 of the orifice 25 via the needle 23, and the orifice 2
It is possible to secure a reliable occlusion property without making the processing accuracy of No. 5 and the accuracy of the needle displacement direction extremely high.

As a result, for example, high pressure on the hydraulic passage 13 side,
If low-pressure hydraulic oil is being supplied to the hydraulic passage 12, a predetermined current is passed through the coil 31 so that the hydraulic oil passage 24
Is conducted, the hydraulic oil flows from the hydraulic passage 13 toward the hydraulic passage 12 at a flow rate corresponding to the pressure difference and the diameter of the orifice 25. At this time, the solenoid valve 20 receives a stress corresponding to the flow resistance when the working oil flows through the orifice 25 in the axial direction.

On the other hand, when the current flowing through the coil 22 is appropriately switched to shut off the hydraulic oil passage 24, the hydraulic oil is blocked from flowing, and the hydraulic pressure generated in the hydraulic passage 13 directly causes the ball valve 26 and the needle 23 to flow. Through solenoid valve 2
Transmitted to 0. Therefore, in this case, the solenoid valve 2
At 0, the differential pressure between the hydraulic passages 13 and 12 acts in the axial direction.

That is, the solenoid valve 20 of the present embodiment.
In the above, every time the hydraulic oil passage 24 is turned on or off, the hydraulic pressure applied in the axial direction greatly changes. Therefore, the solenoid valve 20 and the housing 11
The assembling mechanism of and is required to be easy to assemble and have a structure capable of ensuring sufficient stability against such stress fluctuation in the axial direction.

FIG. 3 is a structural sectional view showing the whole assembling mechanism of the solenoid valve 20 which is constructed by using the wave washer 10 of this embodiment so as to satisfy the above requirement. Here, an O-ring 2 is provided between the housing 11 and the solenoid 20 in order to ensure a sealing property against hydraulic oil.
7, 28 are arranged, and a C ring 29 is used as a mechanism for preventing the solenoid valve 20 from coming off.

In this case, the C ring 29 has a groove 21a provided in the housing 11 and a flange 21 provided on the outer cylinder 21 of the solenoid valve 20 as shown in FIG.
It is sandwiched between a and a and can stably receive the axial stress acting on the solenoid valve 20. At this time, the wave washer 10 of this embodiment biases the solenoid valve 20 upward in FIG.
It acts to secure the clamping force of the.

The operation of the wave washer 10 will be described below with reference to the assembly flow chart shown in FIG. Note that FIG. 4 is an enlarged view of the periphery of the assembly portion of the wave washer 10 shown in FIG. 3, and FIGS. 4 (A) to 4 (C)
The flow of assembly is shown in this order.

That is, when assembling the solenoid valve 20 to the housing 11, first, the wave washer 10 is installed on the lower surface of the flange 21a, and the outer cylinder 21a is inserted into the housing 11 as shown in FIG. Apply pressing force. As a result, the wave washer 10
As shown in the figure, the peaks 10a and the valleys 10b are crushed to be flat, and a predetermined gap is formed between the groove 11a of the housing 11 and the flange 21a of the outer cylinder 21.

Next, processing is performed to insert the C ring 29 into the gap thus formed. That is, FIG. 4 (B)
As shown in (4), the C ring 29 deformed in the small diameter direction is fitted into the groove 11a while the outer cylinder 21 is appropriately pressed. At this time, the above-mentioned predetermined gap is formed between the outer cylinder 21 and the housing 11, and the flange 21a does not interfere when the C ring 29 is fitted.

When the predetermined pressing force applied to the outer cylinder 21 is released in this state, the outer cylinder 21 of the solenoid 20 is caused by the restoring force of the wave washer 10 as shown in FIG. 4 (C). Is displaced upward in the figure. As a result, the predetermined gap formed between the housing 11 and the outer cylinder 21 narrows, and finally the gap disappears at the position where the C ring 29 is held.

When such a structure is adopted, the C ring 29 is provided with the groove 11a unless the solenoid 20 is pressed in the direction in which the peaks 10a and the valleys 10b of the wave washer 10 are crushed.
Never leave. Therefore, as described above, the assembly can be performed very easily, and the solenoid 20 does not come off from the housing 11 in the normal usage mode unless the operator presses the assembly. Will be done.

By the way, in constructing such a mechanism, the wave washer 10 is required to have the following characteristics. The first is to have suitable elasticity. This property is required because if the wave washer 10 is too stiff, the assembling property will deteriorate, and if it is too soft, problems will occur in the seismic resistance after assembling.

Secondly, the position is determined at an appropriate position when it is set in the insertion opening of the housing 11. That is, if the center of the wave washer 10 is displaced when the wave washer 10 is set in the housing 11,
If a process for inserting the solenoid valve 20 is set later, interference during the insertion becomes a problem.

If the position in the thickness direction is not properly determined, when the solenoid valve 20 is inserted and the above-mentioned pressing force is applied, a predetermined gap is provided between the outer cylinder 21 and the housing 11. Could not be secured, C ring 2
A situation occurs in which 9 cannot be fitted properly.

In this case, since the elasticity described above is substantially determined by the material and shape of the wave washer 10, it is not so difficult to obtain a predetermined value even if the manufacturing error is taken into consideration, and there is no problem. However, there is a problem with regard to the positioning property, which is the second required characteristic.

In order to ensure the positioning accuracy when the wave washer 10 is set in the housing 11, the diameter of the insertion hole provided in the housing 11 for installing the wave washer and the diameter of the wave washer 10 are accurately matched. On the other hand, a corner R is formed at the corner of the insertion opening of the housing 11 due to processing restrictions.

That is, as shown in FIG. 5, the housing 11
When a concave shape such as the corner portion 11c is formed by providing the insertion opening 11b of the corner portion 1b, the corner portion 1 is subject to processing restrictions.
It may be unavoidable that the corner R is formed at 1c. Therefore, as shown in FIG. 5B, the diameter of the wave washer 1 is set to the housing 1 in order to secure the positioning accuracy.
When the diameter is set to be substantially the same as the diameter of the insertion opening 11b of No. 1, the wave washer is located on the corner R, and as a result, the position accuracy in the height direction cannot be ensured.

The wave washer 1 of this embodiment shown in FIG.
In No. 0, the hexagonal shape is adopted to prevent such a situation from occurring. That is, in a circular donut-shaped wave washer 1 like the conventional wave washer 1, since the peak portion 1a and the valley portion 1b are all formed on the circumference of a uniform diameter, the wave washer 1 is almost the same as this. When they were inserted into the insertion port 11b having the diameter, their contact points were always located at the corners 11c of the insertion port 11b.

On the other hand, in the wave washer 10 of this embodiment, as shown in FIG. 1, the peaks 10a and the valleys 10b are formed on each side of the hexagonal donut shape. Therefore, when the circular insertion opening 11b is provided in accordance with the diameter of the maximum outer diameter portion 10c, the wave washer 10 inserted into the insertion opening 11b has a maximum width as shown in FIG. The position is regulated by the outer diameter portion 10c.

By the way, in this case, the maximum outer diameter portion 11c is
As described above, it always exists between the mountain portion 10a and the valley portion 10b. Therefore, when it is inserted into the insertion opening 11b, it is separated from the bottom surface of the insertion opening 11b by the depth of the valley of the valley 10b. That is, this maximum outer diameter portion 11c is always the corner portion 1 of the insertion port 11b.
Since it is located above 1c, it is not affected by the corner R.

On the other hand, the valley portion 10b where the wave washer 10 comes into contact with the housing 11 is a view taken in the direction of arrow IIB in FIG.
As shown in (B), the bottom surface of the insertion port 11b always contacts the inside of the corner 11c, that is, the position where the corner R does not exist, and the corner R is not affected.

As described above, according to the wave washer 10 of this embodiment, there is no influence of the corner R formed in the insertion port 11b of the housing 11, and the thickness direction and the surface direction can be easily and accurately adjusted. Can be positioned as desired. Therefore, as described above, the solenoid valve 20
When applied to the assembling mechanism or the like, desired characteristics can be surely ensured, and it can greatly contribute to the realization of an easy and sure assembling mechanism.

In the wave washer 10 of this embodiment, both the peak portion 10a and the valley portion 10b are the maximum outer diameter portion 1
A hexagonal shape having a smaller diameter than that of 1c is adopted so that the wave washer 10 can be assembled without making a front / back determination, but it is not always necessary that both the peak portion 10a and the valley portion 10b have a small diameter.

That is, in the case where the front and back of the wave washer 10 are judged at the time of assembling the wave washer 10, only one of the peak portion 10a and the valley portion 10b of the wave washer 10 has a small diameter, and its surface faces the corner R of the insertion port 11b. It may be configured to be assembled as follows.

[0046]

As described above, according to the wave washer of the present invention, when the surface having at least the valley portion is assumed to be a circle having the same diameter as the maximum outer diameter portion, the fixed object or the covered object is always inside. Contact with a fixed object. Therefore, when the wave washer according to the present invention is inserted into the insertion opening provided in the fixed object or the object to be fixed, at least the valley portion is
It can be installed in the insertion opening without riding on the corner R formed at the corner of the insertion opening. Further, in this case, since the maximum outer diameter portion is restricted by the inner wall of the insertion opening, the positional accuracy of the wave washer in the surface direction can be reliably ensured.

As described above, according to the wave washer of the present invention, the positioning can be performed with high accuracy in the plane direction and the thickness direction regardless of the presence of the corner R formed in the insertion opening of the fixed object or the fixed object. It is possible, and it has a feature that it can greatly contribute to the realization of an easy and reliable assembly mechanism of a fixed object and a fixed object.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a wave washer according to the present invention.

FIG. 2 is a diagram for explaining the effect of the wave washer according to the present invention.

FIG. 3 is a configuration cross-sectional view showing an overall configuration of an example of an assembling mechanism using a wave washer according to the present invention.

FIG. 4 is a diagram for explaining an assembling procedure in the assembling mechanism using the wave washer according to the present invention.

FIG. 5 is a diagram for explaining a problem when applying a wave washer.

FIG. 6 is a diagram showing a configuration of a conventional wave washer.

[Explanation of symbols]

 10 Wave Washer 10a Crest 10b Valley 10c Maximum Outer Diameter 11 Housing 11a Groove 11b Insertion Port 11c Corners 12, 13 Hydraulic Path 20 Solenoid Valve 21 Outer Cylinder 21a Flange 24 Hydraulic Oil Passage 29 C-Ring

Claims (1)

[Claims] 1. A wave washer having peaks convex in the thickness direction and valleys concave in the thickness direction alternately, wherein at least the valley is smaller than the maximum outer diameter portion of the wave washer. A wave washer characterized by being formed in a shape having an outer diameter of