Stalk roller assembly for an agricultural system
US-11122741-B2 · Sep 21, 2021 · US
Shaft for steering device, method of manufacturing shaft for steering device, and electric power steering device
US11242085B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11242085-B2 |
| Application number | US-201816497094-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 13, 2018 |
| Priority date | Mar 27, 2017 |
| Publication date | Feb 8, 2022 |
| Grant date | Feb 8, 2022 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
To provide a method of manufacturing a shaft for a steering device, the shaft including a spline shaft part to be coupled with an input shaft, a stopper part to be coupled with an output shaft, and an intermediate shaft part that couples the spline shaft part with the stopper part. The method includes: a step of forming a hole part recessed in an axial direction from one end of a pillar-shaped material by forging; and a step of pressing the material in which the hole part has been formed into a die to perform drawing in a radial direction on a portion of the material at which the stopper part is formed and prolonging a length along the axial direction of the hole part at the same time by forging.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of manufacturing a shaft for a steering device that comprises a spline shaft part to be coupled with an input shaft, a stopper part to be coupled with an output shaft, and an intermediate shaft part that couples the spline shaft part with the stopper part, the method comprising: a step of forming a hole part recessed in an axial direction from one end of a pillar-shaped material by forging; and a step of pressing the material in which the hole part has been formed into a die to perform drawing in a radial direction on a portion of the material at which the stopper part is formed and prolonging a length along the axial direction of the hole part at a same time by forging, wherein a mandrel is inserted into the hole part to perform the forging. 2. The method of manufacturing the shaft for a steering device according to claim 1 , wherein, at the step of pressing the material into the die, a spline part including projections and depressions along the axial direction is formed on an outer circumference of the stopper part, by forging. 3. The method of manufacturing the shaft for a steering device according to claim 1 , wherein the length along the axial direction of the hole part is prolonged, and a diameter of the hole part is reduced by forging. 4. The method of manufacturing the shaft for a steering device according to claim 1 , wherein, at the step of pressing the material into the die, a large-diameter part not subjected to drawing is formed between the stopper part and the intermediate shaft part, by forging, and the hole part is continuously formed over the stopper part and the large-diameter part. 5. The method of manufacturing the shaft for a steering device according to claim 4 , wherein the hole part includes a first inner wall surface disposed inside the stopper part, and a second inner wall surface disposed inside the large-diameter part, and an inner diameter of the second inner wall surface is formed to be larger than an inner diameter of the first inner wall surface. 6. The method of manufacturing the shaft for a steering device according to claim 5 , wherein a metal flow in the vicinity of the first inner wall surface is formed more densely than a metal flow in the vicinity of the outer circumference of the stopper part.
Assignees
Inventors
Classifications
Connecting steering column to steering gear · CPC title
Swaging presses; Upsetting presses · CPC title
of specially-shaped cross-section · CPC title
- B62D5/0409Primary
Electric motor acting on the steering column · CPC title
- B21K1/066Primary
splined · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11242085B2 cover?
- To provide a method of manufacturing a shaft for a steering device, the shaft including a spline shaft part to be coupled with an input shaft, a stopper part to be coupled with an output shaft, and an intermediate shaft part that couples the spline shaft part with the stopper part. The method includes: a step of forming a hole part recessed in an axial direction from one end of a pillar-shaped …
- Who is the assignee on this patent?
- Nsk Ltd
- What technology area does this patent fall under?
- Primary CPC classification B62D5/0409. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 08 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).