# US 2013/0239389 A1 · Method of processing gear reduction box

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- Number: US 2013/0239389 A1
- Document ID: US20130239389A1
- Status: Published application
- Kind: A1
- Application number: 13/873,028
- Filed: 2013-04-29
- Published: 2013-09-19
- Earliest claimed: 2010-10-29
- Assignees: Changchun Railway Vehicles Co., Ltd.
- Applicants: Changchun Railway Vehicles Co., Ltd.
- Inventors: XIAOFENG LIU
- Web page: https://patentgrep.com/patent/US20130239389A1

## CPC

- B23P 15/00: Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- F16H 57/02: Gearboxes; Mounting gearing therein
- F16H 57/022: Adjustment of gear shafts or bearings (for compensating misalignment of axes of toothed gearings without orbital motion F16H1/26; for compensating misalignment of axes of planetary gears F16H1/48)
- Y10T 29/49826: Assembling or joining
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- F16H: GEARING
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method of processing a gear reduction box is disclosed. Taking the outer wall of the driving gear hole on the gear reduction box as a reference, scribing the center O2 of the driving gear hole, and scribing the center O1 of the driven gear hole, then extending the connecting line O2O1 to two ends A and B of the gear reduction box body, and punching sample holes to facilitate alignment with a scribing needle. The gear reduction box is hanged on a processing jig, and the gear box is rotated as a whole by left-right movement of the left adjustable support assembly and up-down movement of the right adjustable support assembly, thereby the center O2 of the driving gear hole and the center O1 of the driven gear hole form a horizontal line. The connecting line O2O1 and a work table of the machine tool are horizontal.

## Claims

### Claim 1

A method of processing gear reduction box, characterized in by comprising the following steps:
1) firstly, a central support disk and a scriber are used to scribe a center O2 of a driving gear hole, and a scribing template and the central support disk are used to scribe a center O1 of a driven gear hole, then the connecting line O1O2 of the centers of the driven gear hole and driving gear hole is extended to two end points A and B of the gear reduction box body, and sample holes are punched to facilitate alignment with a scribing needle;
2) the gear reduction box is hanged on a processing jig, and the gear box is rotated as a whole by left and right movement of a left adjustable support assembly and up and down movement of a right adjustable support assembly, thereby the center O2 of the driving gear hole and the center O1 of the driven gear hole form a horizontal line, and the connecting line AB of the centers of the driving gear hole and the driven gear hole is aligned by the scribing needle, such that the connecting line and a work table of a machine tool are horizontal, thereby the requirements for the processing precision of the center distance from the driving gear hole to the driven gear hole can be ensured;
3) firstly, each section of the gear box is roughly processed, then surfaces and holes of a handle, a bottom plate and an oil needle seat are processed, and the driving gear hole and the driven gear hole are finely processed after welding.

### Claim 2 (depends on 1)

The method of processing gear reduction box according to claim 1, characterized in that: scribing template draws a vertical line O2D from the center O2 of the driving gear hole to the flask joint CO1E of the gearbox, angle CO1O2 equals to a°+b°, the overall rotation angle b° of the gearbox is acquired by calculating a vertical distance H between the center of the driving gear hole and the center of the driven gear hole and the center distance O2O1, that is, sin b°=H/O2O1.

### Claim 3 (depends on 1)

The method of processing gear reduction box according to claim 1, characterized in that: the left adjustable support assembly comprises a locking plate, a supporting seat, a screw, a fixed seat, the screw is connected with the supporting seat through the fixed seat, both ends of the supporting seat are connected with the locking plate

### Claim 4 (depends on 1)

The method of processing gear reduction box according to claim 1, characterized in that: the right adjustable support assembly comprises a guide seat, an upper oblique wedge, a supporting seat, a lower oblique wedge, a screw, a fixed seat, the screw is connected with the lower oblique wedge, the upper wedge is on the top of the lower oblique wedge and their oblique planes are opposite to each other, the supporting seat is disposed on the upper oblique wedge.