WORM REDUCER, MANUFACTURING METHOD OF THE SAME AND ELECTRIC POWER STEERING DEVICE

• Main Author: KAWAMURA HISASHI
• Format: Patent
• Language: English; Japanese
• Published: 30.11.2017
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; LIGHTING; MECHANICAL ENGINEERING; MOTOR VEHICLES; PERFORMING OPERATIONS; THERMAL INSULATION IN GENERAL; TRAILERS; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a worm reducer which achieves excellent assemblability.SOLUTION: A worm reducer 15 includes a worm shaft 18 including a first end part 18a connected with an electric motor 14 and a second end part 18b opposite to the first end part 18a. The worm reducer 15 includes a bearing holder 50, a cover member 44, and a biasing member 70. The bearing holder 50, the cover member 44, and the biasing member 70 are formed as a unit. The bearing holder 50 holds a second bearing 34 supporting the second end part 18b of the worm shaft 18. The cover member 44 is attached to a housing 17 while closing an opening 17c of the housing 17 from the outer side. The biasing member 70 is disposed between the bearing holder 50 and the cover member 44 and biases the second end part 18b through the bearing holder 50 and the second bearing 34 so that the worm shaft 18 comes close to a worm wheel 19.SELECTED DRAWING: Figure 2 【課題】組立性に優れたウォーム減速機を提供する。【解決手段】ウォーム減速機１５が、電動モータ１４に連結される第１端部１８ａと第１端部１８ａの反対側の第２端部１８ｂとを含むウォームシャフト１８を備える。ウォーム減速機１５が、軸受ホルダ５０、蓋部材４４及び付勢部材７０を含む。軸受ホルダ５０、蓋部材４４及び付勢部材７０はユニット化される。軸受ホルダ５０は、ウォームシャフト１８の第２端部１８ｂを支持する第２軸受３４を保持する。蓋部材４４は、ハウジング１７の開口部１７ｃを外側から塞ぐ状態でハウジング１７に取り付けられる。付勢部材７０は、軸受ホルダ５０と蓋部材４４との間に介在し、ウォームシャフト１８がウォームホイール１９に近づくように軸受ホルダ５０及び第２軸受３４を介して第２端部１８ｂを付勢する。【選択図】図２