JP3411398B2 - Inner ring of constant velocity universal joint - Google Patents
Inner ring of constant velocity universal jointInfo
- Publication number
- JP3411398B2 JP3411398B2 JP17867894A JP17867894A JP3411398B2 JP 3411398 B2 JP3411398 B2 JP 3411398B2 JP 17867894 A JP17867894 A JP 17867894A JP 17867894 A JP17867894 A JP 17867894A JP 3411398 B2 JP3411398 B2 JP 3411398B2
- Authority
- JP
- Japan
- Prior art keywords
- inner ring
- constant velocity
- velocity universal
- universal joint
- spherical surface
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
- F16D2003/22309—Details of grooves
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明は、自動車等の動力伝達
用として使用される等速自在継手に関し、特にその内輪
に関するものである。
【０００２】
【従来の技術】図２に示すように、等速自在継手の内輪
は、外球面１に一定間隔をおいて軸方向の数本のボール
溝２が設けられている。上記の外球面１とボール溝２と
の間には、トルク負荷時の盛り上がりの発生を防止する
ために、面取部３が設けられる。その面取部３とボール
溝２との境界はエッジ部４が残存しており、また面取部
３と外球面１との境界にもエッジ部５が残存している。
以下前者をボール溝側エッジ部４、後者を外球面側エッ
ジ部５と称する。
【０００３】
【発明が解決しようとする課題】近年等速自在継手は、
自動車の燃費性能改善の為の軽量化に伴い、等速自在継
手についても１サイズ小さく、しかも強度は従来サイズ
と同等以上のものが求められている。
【０００４】ところで、従来サイズの等速自在継手にお
いて、高トルクを負荷した場合、図２（ｂ）に一点鎖線
で示すように、ボール６によってボール溝側エッジ部４
が押し潰され、外球面側エッジ部５に盛り上がり７が生
じる。
【０００５】特に、高作動角、高トルク負荷時に大きな
盛り上がり７が生じ、これがボール保持器と干渉を起こ
し、異音を発生したり、場合によっては作動不良を招来
することさえある。
【０００６】そこで、この発明は上記のごとき盛り上が
りを抑制し、小形、高トルクに適した等速自在継手の内
輪を提供することを目的とする。
【０００７】
【課題を解決するための手段】上記の課題を解決するた
めに、この発明は、図１に示すように、外球面１とボー
ル溝２との間に面取部３を設けてなる等速自在継手の内
輪において、ボール溝側エッジ部４は従来どおりのまま
とし、従来の外球面側エッジ部５に代えてこの部分を円
弧面８とし、この円弧面８により面取部３と外球面１と
の間を滑らかに連続させた構成としたものである。
【０００８】
【作用】上記のごとき円弧面８とすることにより、従来
の外球面側エッジ部５（図（ｂ）の一点鎖線参照）に比
べ肉が少なくなり、その分だけ径方向への突出量が小さ
くなる。また、円弧面８により滑らかになるので、応力
集中が緩和される。
【０００９】従って、高作動角で高トルクが負荷され、
ボール６によりボール溝側エッジ部４が押し潰されて
も、円弧面８の部分は従来より肉が少なく、かつ応力集
中が緩和されるので盛り上がりが抑制される。
【００１０】なお、上記の円弧面８は、内輪の鍛造時に
形成すると、製造コストに影響を与えない。
【００１１】
【実施例】同一サイズの内輪に関し、外球面側エッジ部
５を残した従来品と、この部分を円弧面８とした実施品
について、高作動角、高トルク負荷の同一条件下で盛り
上がり７の高さΔＲ（図２（ｂ）参照）を、それぞれ１
０個の試供品について測定したところ、従来品は平均値
で９６．７μｍであったのに対し、実施品は３０．３μ
ｍであり、約７０％減少することが確認できた。
【００１２】
【発明の効果】以上のように、この発明は等速自在継手
の内輪において、そのボール溝と外球面との間に設けら
れた面取部と外球面との間に円弧面を設け、これにより
面取部と外球面との間を滑らかに連続させたので、高作
動角、高トルク負荷時における円弧面部分での盛り上が
りを抑制することができる。このため、その盛り上がり
に起因するボール保持器と内輪との干渉が防止される。
従って、この発明の内輪によると、従来の場合より高負
荷トルクに耐えることができ、高強度化が図れる効果が
ある。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant velocity universal joint used for power transmission of an automobile or the like, and more particularly to an inner ring thereof. 2. Description of the Related Art As shown in FIG. 2, an inner race of a constant velocity universal joint is provided with several ball grooves 2 in an axial direction at regular intervals on an outer spherical surface 1. A chamfered portion 3 is provided between the outer spherical surface 1 and the ball groove 2 in order to prevent swelling when a torque is applied. An edge 4 remains at the boundary between the chamfer 3 and the ball groove 2, and an edge 5 also remains at the boundary between the chamfer 3 and the outer spherical surface 1.
Hereinafter, the former is referred to as a ball groove side edge portion 4 and the latter is referred to as an outer spherical surface side edge portion 5. [0003] In recent years, constant velocity universal joints
With the reduction in weight for improving the fuel efficiency of automobiles, constant velocity universal joints are required to be one size smaller and have strength equal to or greater than that of the conventional size. In the conventional size constant velocity universal joint, when a high torque is applied, as shown by a dashed line in FIG.
Is crushed, and a bulge 7 occurs at the outer spherical surface side edge portion 5. [0005] In particular, a large bulge 7 occurs at a high operating angle and a high torque load, and this causes interference with the ball retainer, which may cause abnormal noise or even malfunction. Accordingly, an object of the present invention is to provide an inner ring of a constant velocity universal joint which suppresses the swelling as described above and is suitable for small size and high torque. [0007] In order to solve the above-mentioned problems, the present invention provides a chamfered portion 3 between an outer spherical surface 1 and a ball groove 2 as shown in FIG. in the inner ring of the constant velocity universal joint comprising a ball groove side edge portion 4 is left as before, this portion as a circular arc surface 8 in place of the outer spherical surface side edge portion 5 of the traditional, chamfer by the circular arc surface 8 3 and the outer spherical surface 1 are smoothly connected. [0008] By forming the arc surface 8 as described above, the wall thickness is reduced as compared with the conventional outer spherical surface side edge portion 5 (see the dashed line in FIG. 1B), and the protrusion in the radial direction is correspondingly reduced. The amount is smaller. Further, since the arc surface 8 makes the surface smoother, stress concentration is reduced. Therefore, a high torque is applied at a high operating angle,
Even if the ball groove side edge portion 4 is crushed by the ball 6, the portion of the circular arc surface 8 has a smaller thickness than before and the stress concentration is eased, so that the swelling is suppressed. [0010] When the above-mentioned circular arc surface 8 is formed at the time of forging the inner ring, it does not affect the manufacturing cost. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With respect to an inner ring of the same size, a conventional product in which an outer spherical surface side edge portion 5 is left, and a product in which this portion has an arc surface 8 under the same conditions of a high operating angle and a high torque load. The height ΔR of the swell 7 (see FIG. 2B) is
When the measurement was carried out for zero test samples, the average value of the conventional product was 96.7 μm, while that of the actual product was 30.3 μm.
m, which was confirmed to be reduced by about 70%. As described above, according to the present invention, in the inner race of the constant velocity universal joint, the arc surface is formed between the chamfer provided between the ball groove and the outer spherical surface and the outer spherical surface. Since the gap between the chamfered portion and the outer spherical surface is made smooth and continuous by this, it is possible to suppress the swelling at the circular arc surface portion at the time of a high operating angle and a high torque load. Therefore, interference between the ball retainer and the inner ring due to the swelling is prevented.
Therefore, according to the inner ring of the present invention, it is possible to withstand a higher load torque than in the conventional case, and it is possible to increase the strength.
【図面の簡単な説明】 【図１】（ａ）実施例の内輪の一部省略正面図 （ｂ）同上の一部拡大断面図 【図２】（ａ）従来例の内輪の一部省略正面図 （ｂ）同上の一部拡大断面図 【符号の説明】 １ 外球面 ２ ボール溝 ３ 面取部 ４ ボール溝側エッジ部 ５ 外球面側エッジ部 ６ ボール ７ 盛り上がり ８ 円弧面[Brief description of the drawings] FIG. 1 (a) is a partially omitted front view of an inner ring of an embodiment. (B) Partially enlarged sectional view of the above. FIG. 2 (a) is a partially omitted front view of an inner ring of a conventional example. (B) Partially enlarged sectional view of the above. [Explanation of symbols] 1 outer spherical surface 2 Ball groove 3 chamfer 4 Ball groove side edge 5 Edge of outer spherical surface 6 balls 7 climax 8 Arc surface
Claims (1)
け、該面取部とボール溝との境界にボール溝側エッジ部
を残存せしめ、該面取部と外球面との境界に外球面側エ
ッジ部を残存せしめてなる等速自在継手の内輪におい
て、上記ボール溝側エッジ部を残存せしめるとともに、
上記外球面側エッジ部に代えてその部分を円弧面とし、
該円弧面により上記面取部と外球面との間を滑らかに連
続させたことを特徴とする等速自在継手の内輪。(57) [Claim 1] A chamfered portion is provided between an outer spherical surface and a ball groove, and a ball groove side edge portion is provided at a boundary between the chamfered portion and the ball groove.
Remaining on the outer sphere side at the boundary between the chamfer and the outer sphere.
In the inner ring of the constant velocity universal joint, which leaves the ridge portion, while leaving the ball groove side edge portion,
In place of the outer spherical surface side edge portion, the portion is an arc surface,
The inner ring of the constant velocity universal joint by the arc surface, characterized in that is continuous between the chamfered portion and the outer spherical surface in sliding Laka.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17867894A JP3411398B2 (en) | 1994-07-29 | 1994-07-29 | Inner ring of constant velocity universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17867894A JP3411398B2 (en) | 1994-07-29 | 1994-07-29 | Inner ring of constant velocity universal joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0842585A JPH0842585A (en) | 1996-02-13 |
| JP3411398B2 true JP3411398B2 (en) | 2003-05-26 |
Family
ID=16052649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17867894A Expired - Lifetime JP3411398B2 (en) | 1994-07-29 | 1994-07-29 | Inner ring of constant velocity universal joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3411398B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008267533A (en) * | 2007-04-23 | 2008-11-06 | Ntn Corp | Fixed constant velocity universal joint |
| JP2023085947A (en) | 2021-12-09 | 2023-06-21 | 株式会社ジェイテクト | constant velocity universal joint |
-
1994
- 1994-07-29 JP JP17867894A patent/JP3411398B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0842585A (en) | 1996-02-13 |
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