JPH0222539Y2 - - Google Patents
Info
- Publication number
- JPH0222539Y2 JPH0222539Y2 JP13288083U JP13288083U JPH0222539Y2 JP H0222539 Y2 JPH0222539 Y2 JP H0222539Y2 JP 13288083 U JP13288083 U JP 13288083U JP 13288083 U JP13288083 U JP 13288083U JP H0222539 Y2 JPH0222539 Y2 JP H0222539Y2
- Authority
- JP
- Japan
- Prior art keywords
- spool
- land portion
- switching valve
- land
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000012856 packing Methods 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Multiple-Way Valves (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、切換弁におけるスプールに関するも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a spool in a switching valve.
従来、例えば、実開昭55−76873号公報に示さ
れるダイアフラムポンプは、第１図および第２図
に示すように、ポンプ本体１に切換弁２を一体的
に設け、左右のダイアフラム３を連結するロツド
４に設けたスプール構造と前記切換弁２のスプー
ル５との相互切換作用によつて左右の駆動空気室
６に交互に駆動空気を供給し、ダイアフラム３を
介して左右のポンプ室７を交互に膨脹または収縮
し、吸込口（図示せず）から吸込用逆止弁（図示
せず）を介して液などを左右のポンプ室７に交互
に吸込むとともに左右の吐出用逆止弁８を介して
交互に前記液などを吐出口９に吐出するものであ
る。
Conventionally, for example, a diaphragm pump disclosed in Japanese Utility Model Application Publication No. 55-76873 has a switching valve 2 integrally provided in a pump body 1, and left and right diaphragms 3 connected, as shown in FIGS. 1 and 2. Drive air is alternately supplied to the left and right drive air chambers 6 by mutual switching between the spool structure provided on the rod 4 and the spool 5 of the switching valve 2, and the left and right pump chambers 7 are supplied via the diaphragm 3. It alternately expands or contracts, and alternately sucks liquid etc. into the left and right pump chambers 7 from a suction port (not shown) through a suction check valve (not shown), and also closes the left and right discharge check valves 8. The liquid and the like are alternately discharged to the discharge port 9 through the discharge port 9.
そして、前記切換弁２のスプール５は、第３図
に示すように、スプール本体１１の両側部にラン
ド部１２を硬質材料によつて成形し、この両側の
ランド部１２の端面１３はほぼ平面に成形してな
る。 As shown in FIG. 3, the spool 5 of the switching valve 2 has land portions 12 formed of a hard material on both sides of the spool body 11, and the end surfaces 13 of the land portions 12 on both sides are substantially flat. It is molded into
また、前記従来のスプール５は、左右のランド
部１２の周面に凹溝を形成し、この周面凹溝にＯ
リングを嵌着し、このＯリングにより切換弁本体
１４の内周面との間の気密を保つようにしてい
る。 Further, the conventional spool 5 has grooves formed on the circumferential surfaces of the left and right land portions 12, and O
A ring is fitted, and this O-ring maintains airtightness between the switching valve main body 14 and the inner circumferential surface thereof.
ところが、このようなスプール５は、切換時に
左右のランド部１２の端面１３が切換弁本体１４
に当接した瞬間に騒音となる衝突音を発生させて
いる。また、別体のＯリングを嵌着することは、
製造工程において手数および費用の面で好ましい
ものではない。
However, in such a spool 5, the end surfaces 13 of the left and right lands 12 touch the switching valve body 14 during switching.
The moment it makes contact with the object, it generates a noisy collision sound. Also, fitting a separate O-ring is
This is not preferable in terms of labor and cost in the manufacturing process.
本考案の目的は、切換時に騒音となる程の衝突
音を発生させないように工夫されたＯリングレス
のスプールを提供しようとするものである。 An object of the present invention is to provide an O-ring-less spool that is devised so as not to generate a collision sound that becomes a noise during switching.
〔問題点を解決するための手段〕
本考案は、スプール本体２１と、このスプール
本体２１の両端部に設けられたランド部２２と、
この両端のランド部２２の端面２３の中央部に円
環状の凹溝２４を介して設けられこのランド部２
２の端面より先端をやや突出された円柱部２５
と、前記ランド部２２の外周面に設けられた凸状
のパツキング部２６とを、弾性材料によつて一体
に成形し、また前記凹溝２４は、前記円柱部２５
の周囲に設けられこの円柱部２５が衝撃により変
形したときに周辺部と干渉しないだけの充分な幅
および深さを有する切換弁におけるスプールであ
る。[Means for solving the problem] The present invention includes a spool body 21, land portions 22 provided at both ends of the spool body 21,
This land portion 2 is provided at the center of the end surface 23 of the land portion 22 at both ends via an annular groove 24.
A cylindrical part 25 whose tip slightly protrudes from the end face of 2.
and a convex packing portion 26 provided on the outer circumferential surface of the land portion 22 are integrally molded from an elastic material, and the groove 24 is formed on the cylindrical portion 25.
This is a spool in a switching valve that is provided around the cylindrical part 25 and has sufficient width and depth so as not to interfere with the surrounding part when the cylindrical part 25 is deformed by impact.
本考案は、前記スプール２１が移動して切換弁
本体と衝突したときに、前記弾性材料の円柱部２
５が前記凹溝２４内で弾力的に変形して、前記切
換弁本体との衝突時の衝撃を和らげ、騒音が生じ
ない。さらに、前記凹溝２４があるため、前記パ
ツキング部２６に弾力性が生じ、このパツキング
部２６が切換弁本体の内周面と確実に密着する。
In the present invention, when the spool 21 moves and collides with the switching valve body, the cylindrical portion 2 of the elastic material
5 is elastically deformed within the groove 24 to soften the impact upon collision with the switching valve body, and no noise is generated. Further, since the groove 24 is present, the packing portion 26 has elasticity, and the packing portion 26 reliably comes into close contact with the inner circumferential surface of the switching valve body.
以下、本考案を第４図に示す実施例を参照して
詳細に説明する。
Hereinafter, the present invention will be explained in detail with reference to the embodiment shown in FIG.
スプール本体２１と、このスプール本体２１の
両端部に設けたランド部２２と、このランド部２
２の端面２３の中央部に円環状の凹溝２４を介し
て設けられ先端部を前記ランド部２２の端面２３
よりやや突出させた円柱部２５とを、弾性材料た
とえば合成ゴム、軟質合成樹脂等によつて一体に
成形する。また前記両側のランド部２２は、外周
面に凸状のパツキング部２６を一体に成形してな
り、従来のスプールのようにランド部にＯリング
パツキングを装着する必要がなく、手間がかから
ない。 A spool body 21, a land portion 22 provided at both ends of the spool body 21, and a land portion 22 provided at both ends of the spool body 21.
2 through an annular groove 24 in the center of the end surface 23 of the land portion 22.
A slightly more protruding cylindrical portion 25 is integrally molded from an elastic material such as synthetic rubber or soft synthetic resin. In addition, the land portions 22 on both sides are integrally formed with convex packing portions 26 on the outer circumferential surface, and there is no need to attach O-ring packing to the land portions as in conventional spools, which saves time and effort.
そうして、このスプールを例えば第１図および
第２図に示すような切換弁に用いて使用すると、
凹溝２４が円柱部２５の変形時の逃げ溝となるた
め、またランド部２２の端面２３から突出する突
出部２５ａが短い割には円柱部２５の全長が長い
ため、さらには前記円柱部２５が弾性材料で成形
されているため、スプール切換時にこの円柱部２
５が切換弁本体の左右端部に当接した瞬間に、こ
の円柱部２５が弾力的な圧縮または撓み作用によ
つて衝突時の衝撃を吸収し、騒音の発生を防止す
る。このため、切換弁を静かに切換運転できる。 Then, when this spool is used in a switching valve as shown in FIGS. 1 and 2, for example,
Since the concave groove 24 serves as an escape groove when the columnar portion 25 is deformed, and because the entire length of the columnar portion 25 is long compared to the short protruding portion 25a protruding from the end surface 23 of the land portion 22, the columnar portion 25 is made of elastic material, so when switching the spool, this cylindrical part 2
5 comes into contact with the left and right end portions of the switching valve body, this cylindrical portion 25 absorbs the impact at the time of collision by elastic compression or deflection, thereby preventing the generation of noise. Therefore, the switching valve can be operated quietly.
また、ランド部２２の内側部に凹溝２４を設け
たから、ランド部２２の表層部を薄肉にしてその
弾力性を高めることができ、前記ランド部２２の
外周面にパツキング部２６を設けたことと相俟つ
て、ランド部２２の摺擦面（外周面）のシール効
果（気密性、液密性）を高めることができる。 Further, since the groove 24 is provided on the inner side of the land portion 22, the surface layer of the land portion 22 can be made thinner to increase its elasticity, and the packing portion 26 can be provided on the outer peripheral surface of the land portion 22. Together with this, the sealing effect (airtightness, liquidtightness) of the sliding surface (outer peripheral surface) of the land portion 22 can be enhanced.
本考案によれば、スプール本体の両端ランド部
の端面中央部に、前記ランド部の端面より先端を
やや突出して設けられた円柱部を弾性材料によつ
て一体に成形し、この円柱部の周囲に充分な幅お
よび深さを有する凹溝を設けたから、前記弾性材
料の円柱部は、周辺部と干渉するおそれがなく、
前記凹溝内で自由に変形して、スプール切換作動
時の衝突による衝撃を効果的に吸収でき、騒音と
なる程の衝突音の発生を防止することができる。
また前記ランド部の内部に凹溝を設けるとともに
外周面にパツキング部を一体に設けたから、前記
凹溝により前記ランド部の弾力性を高めることが
でき、このランド部の外周摺擦面での気密性、液
密性等のシール効果を高めることができる。
According to the present invention, a cylindrical part is formed integrally with an elastic material at the center of the end face of the land parts at both ends of the spool body, and the cylindrical part is provided with the tip slightly protruding from the end face of the land part, and the cylindrical part is formed around the cylindrical part. Since the groove having sufficient width and depth is provided, there is no risk that the cylindrical part of the elastic material will interfere with the surrounding part.
By freely deforming within the groove, it is possible to effectively absorb the impact caused by the collision during the spool switching operation, and it is possible to prevent the occurrence of collision noise that is loud enough to cause noise.
In addition, since a concave groove is provided inside the land portion and a packing portion is integrally provided on the outer circumferential surface, the concave groove can increase the elasticity of the land portion, and the outer peripheral sliding surface of this land portion can be airtight. It is possible to improve the sealing effect such as water tightness and liquid tightness.
第１図はダイアフラムポンプの断面図、第２図
はそのポンプに使用される切換弁の断面図、第３
図はその切換弁に使用される従来のスプールの正
面図、第４図は本考案のスプールの一実施例を示
す断面図である。
２１……スプール本体、２２……ランド部、２
３……端面、２４……凹溝、２５……円柱部、２
６……パツキング部。
Figure 1 is a sectional view of the diaphragm pump, Figure 2 is a sectional view of the switching valve used in the pump, and Figure 3 is a sectional view of the switching valve used in the pump.
The figure is a front view of a conventional spool used in the switching valve, and FIG. 4 is a sectional view showing one embodiment of the spool of the present invention. 21...Spool body, 22...Land part, 2
3...End face, 24...Concave groove, 25...Cylindrical part, 2
6... Packing club.
Claims (1)
設けられたランド部と、この両端のランド部の端
面中央部に円環状の凹溝を介して設けられこのラ
ンド部の端面より先端をやや突出された円柱部
と、前記ランド部の外周面に設けられた凸状のパ
ツキング部とを、弾性材料によつて一体に成形
し、前記凹溝は、前記円柱部の周囲に設けられこ
の円柱部が衝撃により変形したときに周辺部と干
渉しないだけの充分な幅および深さを有すること
を特徴とする切換弁におけるスプール。 A spool body, a land portion provided at both ends of the spool body, and an annular groove provided in the center of the end surface of the land portion at both ends, with the tip slightly protruding from the end surface of the land portion. A cylindrical portion and a convex packing portion provided on the outer circumferential surface of the land portion are integrally molded from an elastic material, and the groove is provided around the cylindrical portion so that the cylindrical portion is protected from impact. 1. A spool for a switching valve, characterized in that the spool has sufficient width and depth so as not to interfere with surrounding parts when deformed by the spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13288083U JPS6040865U (en) | 1983-08-27 | 1983-08-27 | Spool in switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13288083U JPS6040865U (en) | 1983-08-27 | 1983-08-27 | Spool in switching valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6040865U JPS6040865U (en) | 1985-03-22 |
| JPH0222539Y2 true JPH0222539Y2 (en) | 1990-06-18 |
Family
ID=30299934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13288083U Granted JPS6040865U (en) | 1983-08-27 | 1983-08-27 | Spool in switching valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040865U (en) |
-
1983
- 1983-08-27 JP JP13288083U patent/JPS6040865U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6040865U (en) | 1985-03-22 |
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