阅读说明：本技术 一种行星齿轮轴中间槽对称度测量装置及方法 (Device and method for measuring symmetry degree of intermediate groove of planetary gear shaft ) 是由 袁国庆 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种行星齿轮轴中间槽对称度测量装置及方法,主要包括底板等,横担连接于滚针导轨B上端,两块V型定位块分别安装在横担两端,固定块紧固于横担中间,槽平面对块通过弹簧安装在固定块上并相对于固定块作上下移动,固定板上端连接弹簧压紧装置总成,固定板下端连接底板,滚针导轨A通过螺栓紧固于底板,表架上端连接千分表,表架下端连接到滚针导轨A。本发明实现了中间槽对称度数值在千分表上可直接显示,使用简单方便直观,改变了公司以前无法精确检测行星齿轮轴中间槽对称度的局面；保障了行星齿轮轴粗铣中间槽和硬铣中间槽加工时中间槽对称度过程控制与检测,实现试制品顺利交样,并应用于批量加工的检测。(The invention discloses a device and a method for measuring the symmetry degree of a middle groove of a planet gear shaft, which mainly comprise a bottom plate and the like, wherein a cross arm is connected to the upper end of a needle roller guide rail B, two V-shaped positioning blocks are respectively arranged at the two ends of the cross arm, the fixing blocks are fastened in the middle of the cross arm, a groove plane pair block is arranged on the fixing block through a spring and moves up and down relative to the fixing block, the upper end of the fixing plate is connected with a spring pressing device assembly, the lower end of the fixing plate is connected with the bottom plate, the needle roller guide rail A is fastened on the bottom plate through a bolt. The invention realizes that the symmetry value of the middle groove can be directly displayed on the dial indicator, the use is simple, convenient and visual, and the situation that the company cannot accurately detect the symmetry of the middle groove of the planet gear shaft before is changed; the symmetry degree process control and detection of the intermediate groove during the process of roughly milling the intermediate groove and hard milling the intermediate groove of the planetary gear shaft are ensured, smooth sample mixing of a test product is realized, and the method is applied to detection of batch processing.)

1. The utility model provides a slot symmetry measuring device in middle of planet gear axle which characterized in that: mainly comprises a bottom plate (1), a needle roller guide A (2), a needle roller guide B (3), a fixing plate (4), a cross arm (5), V-shaped positioning blocks (6), a spring pressing device assembly (8), a fixing block (9), a spring (10), two V-shaped positioning blocks (6) which are respectively arranged at two ends of the cross arm (5), a gauge stand (12) and a dial indicator (13), wherein the needle roller guide B (3) is fastened above the bottom plate (1) through bolts, the cross arm (5) is connected with the upper end of the needle roller guide B (3), the two V-shaped positioning blocks (6) are respectively arranged at the two ends of the cross arm (5), the fixing block (9) is fastened in the middle of the cross arm (5), the groove plane pair block (11) is arranged on the fixing block (9) through the spring (10) and moves up and down relative to the fixing block (9), the upper end of the fixing, the needle roller guide A (2) is fastened on the bottom plate (1) through bolts, the upper end of the gauge stand (12) is connected with the dial gauge (13), and the lower end of the gauge stand (12) is connected with the needle roller guide A (2).

2. A method for measuring the symmetry degree of a middle groove of a planet gear shaft is characterized by comprising the following steps: the method mainly comprises the following steps:

1) during measurement, one side of a middle groove of the workpiece (7) is aligned to the groove plane pair block (11), and after the workpiece is buffered and corrected by the spring (10), the workpiece (7) is finally positioned on the two V-shaped positioning blocks (6) through an excircle;

2) pulling a spring pressing device assembly (8) to fix the workpiece (7) on the two V-shaped positioning blocks (6);

3) vertically contacting a contact tip of the dial indicator (13) with the plane of the groove on the other side, aligning a pointer on a dial plate of the dial indicator (13) to zero, and moving the workpiece (7) away from the contact of the dial indicator (13) along the needle roller guide rail B (3);

4) after the spring pressing device assembly (8) is pulled up, the workpiece (7) is rotated 180 degrees in the two V-shaped positioning blocks, and the spring pressing device assembly (8) is pulled again to fix the workpiece (7) on the two V-shaped positioning blocks (6);

5) and moving the workpiece (7) along the needle roller guide B3 again to enable the contact tip of the dial indicator (13) to be vertically contacted with the rotated groove plane on one side, and moving the dial indicator (13) along the needle roller guide A (2), wherein the reading difference displayed by the dial indicator (13) is the symmetry error.

Technical Field

The invention relates to the field of planet gear shaft measurement, in particular to a device and a method for measuring the symmetry degree of a middle groove of a planet gear shaft.

Background

According to the technical requirement of symmetry on the drawing of the intermediate groove of the planet gear shaft, the tolerance zone is the area between two parallel planes (two intermediate groove planes) which are symmetrically arranged relative to a reference plane (the central line of the journal) at a distance t. After the intermediate groove of the planet gear shaft is roughly milled and finely milled, a company does not have a corresponding special checking fixture for detecting the symmetry degree of the intermediate groove, and the company does not have a method and a checking fixture for detecting the intermediate groove of the planet gear shaft fundamentally, which is a technical blank under the existing condition.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a device and a method for measuring the symmetry degree of a middle groove of a planet gear shaft.

The purpose of the invention is achieved by the following technical scheme: the device for measuring the symmetry degree of the middle groove of the planetary gear shaft mainly comprises a bottom plate, a needle roller guide rail A, a needle roller guide rail B, a fixing plate, a cross arm, V-shaped positioning blocks, a spring pressing device assembly, a fixing block, a spring, a groove plane pair block, a gauge stand and a dial indicator.

The method for measuring the symmetry degree of the middle groove of the planet gear shaft mainly comprises the following steps:

1) during measurement, one side of a workpiece middle groove is aligned to the groove plane alignment block, and after the workpiece middle groove is buffered and corrected by a spring, the workpiece is finally positioned on the two V-shaped positioning blocks through an excircle;

2) pulling the spring pressing device assembly to fix the workpiece on the two V-shaped positioning blocks;

3) vertically contacting a contact tip of the dial indicator with the plane of the groove on the other side, aligning a pointer on a dial plate of the dial indicator to zero, and moving the workpiece away from the dial indicator along the needle roller guide rail B for contact;

4) turning up the spring pressing device assembly, rotating the workpiece in the two V-shaped positioning blocks by 180 degrees, and turning up the spring pressing device assembly again to fix the workpiece on the two V-shaped positioning blocks;

5) and moving the workpiece along the needle roller guide rail B again to enable the contact tip of the dial indicator to be vertically contacted with the rotated groove plane on one side, moving the dial indicator along the needle roller guide rail A, and determining the reading difference displayed by the dial indicator as the symmetry error.

The invention has the beneficial effects that: the invention realizes that the symmetry value of the middle groove can be directly displayed on the dial indicator, the use is simple, convenient and visual, and the situation that the company cannot accurately detect the symmetry of the middle groove of the planet gear shaft before is changed; the symmetry degree process control and detection of the intermediate groove during the process of roughly milling the intermediate groove and hard milling the intermediate groove of the planetary gear shaft are ensured, smooth sample mixing of a test product is realized, and the method is applied to detection of batch processing.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram of workpiece tolerances according to the present invention.

FIG. 3 is a top view of a workpiece according to the present invention.

Description of reference numerals: the device comprises a base plate 1, a needle roller guide A2, a needle roller guide B3, a fixing plate 4, a cross arm 5, a V-shaped positioning block 6, a workpiece 7, a spring pressing device assembly 8, a fixing block 9, a spring 10, a groove plane pair block 11, a gauge stand 12 and a dial gauge 13.

Detailed Description

The invention will be described in detail below with reference to the following drawings: