JPS641176Y2 - - Google Patents
Info
- Publication number
- JPS641176Y2 JPS641176Y2 JP1983061149U JP6114983U JPS641176Y2 JP S641176 Y2 JPS641176 Y2 JP S641176Y2 JP 1983061149 U JP1983061149 U JP 1983061149U JP 6114983 U JP6114983 U JP 6114983U JP S641176 Y2 JPS641176 Y2 JP S641176Y2
- Authority
- JP
- Japan
- Prior art keywords
- gear housing
- insert pipe
- diameter
- face
- rack
- 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
- 238000005266 casting Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 description 3
- 238000004512 die casting Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Transmission Devices (AREA)
- Gears, Cams (AREA)
Description
【考案の詳細な説明】
本考案はラツクピニオン式舵取装置のギヤハウ
ジングに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gear housing for a rack and pinion steering device.
この種ラツクピニオン式舵取装置は、第１図に
示す如く、ギヤハウジング１にラツク軸２を軸方
向に摺動可能に且僅かに浮動可能に支持し、その
ラツク軸２の両端にストツパー部材３を設けてラ
ツク軸２の摺動ストロークを規制しており、前記
ギヤハウジング１は軽合金ダイカスト製の複雑な
形状部分４とここに一端を鋳ぐるみされて突出し
たインサートパイプ５とから成る。このインサー
トパイプ５は道路上の石などの衝突によりへこみ
等を生じる恐れがあり、そのへこみ等が生じても
ラツク軸２に干渉しないようにラツク軸２との隙
間を充分に設けることから、大きい径のものが使
用されている。ところで第２図に示す如く前記ギ
ヤハウジング１は、鋳抜孔６をインサートパイプ
５と連なるように抜き勾配を有する引抜中子によ
つて形成しており、この引抜中子はその先端面を
インサートパイプの端面に圧接して湯切りを行な
つているので、十分な接触面積を確保することが
必要であり、鋳抜孔６のインサートパイプ端面に
おける内口径D1を少なくともインサートパイプ
５の外径以上にしなければならなかつた。又、引
抜中子の焼付を防ぐために、前記抜き勾配は小さ
くすることができず、鋳抜孔６のギヤハウジング
端面７における開口径D2が内口径D1に比べてさ
らに拡がつている。このようにギヤハウジング端
面７における開口径D2が大きいと、前記ストツ
パー部材３が防塵ブーツ８との干渉を防ぐため外
径を制限されているので、ストツパー部材３のギ
ヤハウジング端部７との接触部分が軸心から遠ざ
かり、前記ストツパー部材３にかかる曲げモーメ
ントが大きくなり、ストツパー部材３が曲がり易
くなる。又、ストツパー部材３とギヤハウジング
端面７との突き当り面積が小さくなり、ギヤハウ
ジングは比較的軟いアルミニユウム合金のダイカ
スト鋳造により形成されているものであり、又前
記ストツパー部材とギヤハウジング端面とは反復
的に衝撃的に衝突するものであるから前記突き当
り面積が小さいと前記ストツパー部材３が前記ギ
ヤハウジング端面７にくい込み易くなる。このよ
うに、ストツパー部材が曲がり易く、ギヤハウジ
ング端面にくい込み易いということから、ラツク
軸の停止位置が狂い、操向安定上好ましくない。 As shown in FIG. 1, this kind of rack and pinion type steering device has a gear housing 1 supporting a rack shaft 2 so as to be able to slide in the axial direction and to be able to float slightly, and stopper members at both ends of the rack shaft 2. 3 is provided to regulate the sliding stroke of the rack shaft 2, and the gear housing 1 consists of a complex-shaped part 4 made of die-cast light alloy and an insert pipe 5 protruding from one end of which is cast. This insert pipe 5 may be dented due to a collision with a stone on the road, etc., and a sufficient gap with the rack shaft 2 is provided so that even if such a dent occurs, it will not interfere with the rack shaft 2, so the insert pipe 5 is large. diameter is used. By the way, as shown in FIG. 2, the gear housing 1 has the casting hole 6 formed by a drawn core having a draft angle so as to be continuous with the insert pipe 5, and the tip of this drawn core is connected to the insert pipe 5. Since hot water is drained by pressure contact with the end surface of the insert pipe, it is necessary to ensure a sufficient contact area. I had to. Furthermore, in order to prevent seizure of the drawing core, the draft angle cannot be made small, and the opening diameter D 2 of the casting hole 6 at the gear housing end face 7 is wider than the inner diameter D 1 . If the opening diameter D 2 at the end face 7 of the gear housing is large as described above, the outer diameter of the stopper member 3 is limited in order to prevent interference with the dustproof boot 8. As the contact portion moves away from the axis, the bending moment applied to the stopper member 3 increases, and the stopper member 3 becomes easier to bend. Further, the abutment area between the stopper member 3 and the gear housing end face 7 is reduced, the gear housing is formed by die casting of a relatively soft aluminum alloy, and the stopper member and the gear housing end face are made of a repeating material. Since the collision is shocking, if the abutment area is small, the stopper member 3 will easily sink into the gear housing end face 7. As described above, since the stopper member is easily bent and easily wedged into the end face of the gear housing, the stop position of the rack shaft becomes out of order, which is unfavorable in terms of steering stability.
本考案はこれらの問題点に鑑みなされたもの
で、その目的とするところはインサートパイプと
連なつて、引抜中子によつて形成された鋳抜孔を
設けたダイカスト鋳造製のギヤハウジングにおい
て、その引抜中子とインサートパイプとの接触面
積を十分に確保しつつ、ギヤハウジング端面にお
ける鋳抜孔開口径を小さくして、前記問題点を解
消することにある。かかる目的は、鋳ぐるみされ
たインサートパイプの鋳抜孔に臨む端部を局部的
に小径に形成した如きラツクピニオン式舵取装置
のギヤハウジングによつて達成される。 The present invention was devised in view of these problems, and its purpose is to provide a die-cast gear housing that is connected to an insert pipe and has a casting hole formed by a drawn core. The object of the present invention is to solve the above-mentioned problems by reducing the opening diameter of the casting hole in the end face of the gear housing while ensuring a sufficient contact area between the drawn core and the insert pipe. This object is achieved by a gear housing for a rack and pinion type steering device in which the end of a cast insert pipe facing the casting hole is locally formed to have a small diameter.
以下図面に従つて本考案の実施例について説明
する。 Embodiments of the present invention will be described below with reference to the drawings.
第３図に示す如く、鋳ぐるみされるインサート
パイプ５の端面から僅かな寸法l1部分が小径に形
成されており、このインサートパイプの小径端面
全体と接触する抜き勾配を有する引抜中子によつ
て鋳抜孔９が形成されている。前記インサートパ
イプ端部の小径部の内径D3は、ラツク軸の径よ
り僅かに大きい径であつて、ラツク軸との干渉を
生じない範囲に定めてある。このようにインサー
トパイプ端部を小径に形成したので、これと接触
する引抜中子の先端径を湯切り機能をそこなうこ
となく小径にできる。これにより鋳抜孔の内孔径
D5がインサートパイプ端面接触径が小さく絞ら
れた分だけ小さく形成され、ギヤハウジング端面
開口径部の鋳抜孔径D4は、インサートパイプ端
面の径が小径に絞られた寸法l2だけ小さく形成さ
れる。このようにギヤハウジング端面開口部の鋳
抜孔径が小さく形成されるので、ストツパー部材
のギヤハウジング端面との接触部分が軸心へ近づ
き、前記ストツパー部材３にかかる曲げモーメン
トも小さくなり、曲がり難くなる。又、そのスト
ツパー部材とギヤハウジング端面との突き当り面
積も大きくなるので、ギヤハウジング端面におけ
る単位面積当りの荷重が小さくなり、前記ストツ
パー部材が前記ギヤハウジング端面にくい込み難
くなる。 As shown in Fig. 3, a portion of the insert pipe 5 to be cast has a small diameter at a small distance from the end face, and is inserted into the insert pipe by a drawn core having a draft angle that contacts the entire small diameter end face of the insert pipe. A casting hole 9 is formed therethrough. The inner diameter D3 of the small diameter portion at the end of the insert pipe is slightly larger than the diameter of the rack shaft, and is set within a range that does not cause interference with the rack shaft. Since the end of the insert pipe is formed to have a small diameter in this way, the diameter of the tip of the drawing core that comes into contact with the end of the insert pipe can be made small without impairing the hot water draining function. This allows the inner diameter of the casting hole to
D 5 is made smaller by the size of the contact diameter on the insert pipe end surface, and the cast hole diameter D 4 on the gear housing end surface opening diameter is made smaller by the size l 2 , which is the size of the diameter on the insert pipe end surface that is reduced to a small diameter. be done. Since the diameter of the cast hole in the gear housing end face opening is formed small in this way, the contact portion of the stopper member with the gear housing end face approaches the axis, and the bending moment applied to the stopper member 3 is also reduced, making it difficult to bend. . Furthermore, since the abutment area between the stopper member and the end face of the gear housing becomes larger, the load per unit area on the end face of the gear housing becomes smaller, making it difficult for the stopper member to sink into the end face of the gear housing.
尚前記インサートパイプ端部の小径部D3は、
ロール成形による絞り加工等によつて比較的容易
に所定の径に成形できる。 The small diameter portion D3 at the end of the insert pipe is
It can be formed into a predetermined diameter relatively easily by drawing by roll forming.
以上のとおり本考案は、インサートパイプと連
なつて引抜中子によつて形成された鋳抜孔を設け
たダイカスト鋳造製のギヤハウジングにおいて、
引抜中子とインサートパイプの接触面積を減ずる
ことなく、ギヤハウジング端面における開口径を
小さくしたので、ストツパー部材３の曲がりが、
ギヤハウジングへのくい込みを小さくすることが
でき、ラツク軸の停止位置が安定し、操向位定性
を確保することができる等の効果を有する。 As described above, the present invention provides a gear housing made of die-casting that has a casting hole formed by a drawn core connected to an insert pipe.
By reducing the opening diameter at the end face of the gear housing without reducing the contact area between the drawing core and the insert pipe, bending of the stopper member 3 is prevented.
This has effects such as being able to reduce the amount of biting into the gear housing, stabilizing the stop position of the rack shaft, and ensuring steering positional stability.
第１図は、従来のラツクピニオン式舵取装置の
断面図である。第２図は、従来のラツクピニオン
式舵取装置のギヤハウジングの拡大断面図であ
る。第３図は、本考案の実施例のラツクピニオン
式舵取装置のギヤハウジングの拡大図である。
符号の説明、１……ギヤハウジング、３……ス
トツパー部材、５……インサートパイプ、６……
鋳抜孔、７……ギヤハウジング端面、９……鋳抜
孔。
FIG. 1 is a sectional view of a conventional rack and pinion steering device. FIG. 2 is an enlarged sectional view of a gear housing of a conventional rack and pinion steering device. FIG. 3 is an enlarged view of the gear housing of the rack and pinion steering device according to the embodiment of the present invention. Explanation of symbols, 1... Gear housing, 3... Stopper member, 5... Insert pipe, 6...
Casting hole, 7... End face of gear housing, 9... Casting hole.
Claims (1)
引抜中子によつて形成された鋳抜孔を設けたダイ
カスト鋳造製のラツクピニオン式舵取装置のギヤ
ハウジングにおいて、鋳ぐるみされたインサート
パイプの鋳抜孔に臨む端部を局部的に小径に形成
したことを特徴とするラツクピニオン式舵取装置
のギヤハウジング。 Connected to a cast insert pipe,
In a die-cast gear housing for a rack and pinion type steering device that has a casting hole formed by a drawn core, the end of the cast insert pipe facing the casting hole is locally formed to have a small diameter. A gear housing for a rack and pinion steering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983061149U JPS59167063U (en) | 1983-04-22 | 1983-04-22 | Gear housing for rack and pinion steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983061149U JPS59167063U (en) | 1983-04-22 | 1983-04-22 | Gear housing for rack and pinion steering gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59167063U JPS59167063U (en) | 1984-11-08 |
| JPS641176Y2 true JPS641176Y2 (en) | 1989-01-11 |
Family
ID=30191370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983061149U Granted JPS59167063U (en) | 1983-04-22 | 1983-04-22 | Gear housing for rack and pinion steering gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59167063U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9321102B2 (en) * | 2011-10-11 | 2016-04-26 | Nsk Ltd. | Steering column and manufacturing method thereof |
-
1983
- 1983-04-22 JP JP1983061149U patent/JPS59167063U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59167063U (en) | 1984-11-08 |
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