In transmission, gears and racks often need to be designed according to actual situations. In the automation industry, many gears and racks are used in conjunction with planetary reducers. Today, the guide rail screw manufacturer will introduce to you the precautions for gear and rack design?

1、齒條的寬度

1. The width of the rack

在實際應(yīng)用中，齒輪的寬度要大于齒條的寬度，一般情況下模2斜齒圓柱齒輪寬度為26mm，模3齒輪為31mm。

In practical applications, the width of the gear should be greater than the width of the rack. Generally, the width of the helical cylindrical gear in module 2 is 26mm, and that of the gear in module 3 is 31mm.

2、齒輪內(nèi)孔公差

2. Tolerance of gear inner hole

當(dāng)齒輪與軸式減速機熱裝時，一般齒輪內(nèi)孔公差取與減速機軸過渡配合，具體公差要參考減速機軸公差。

When gears and shaft reducers are hot assembled, the tolerance of the gear inner hole is generally taken as a transitional fit with the reducer shaft, and the specific tolerance should refer to the reducer shaft tolerance.

3、法蘭盤齒輪安裝凸臺公差

3. Flange gear installation boss tolerance

法蘭盤齒輪凸臺公差一般取與法蘭盤減速機安裝孔間隙配合，這樣才便于調(diào)整總的輸出跳動。

The tolerance of the flange gear boss is generally taken to match the clearance of the installation hole of the flange reducer, so as to facilitate the adjustment of the overall output runout.
導(dǎo)軌絲杠

4、齒輪長度

4. Gear length

原則上齒輪總長度（含輪轂）越短越好，齒輪越短減速機輸出軸所受傾覆力矩越小，在齒輪設(shè)計過程中要嚴(yán)格參考減速機傾覆力矩參數(shù)。

In principle, the shorter the total length of the gear (including the hub), the better. The shorter the gear, the smaller the overturning torque on the output shaft of the gearbox. In the gear design process, strict reference should be made to the overturning torque parameters of the gearbox.

5、齒輪長度與減速機軸長的關(guān)系

5. The relationship between gear length and reducer shaft length

斜齒圓柱齒輪由于存在軸向力，當(dāng)采取齒輪熱裝和花鍵連接時，齒輪設(shè)計過程中，齒輪與減速機軸的配合長度設(shè)計，齒輪長度要略大于減速機軸長度，這樣齒輪端面蓋板才能發(fā)揮作用。

Due to the existence of axial force in helical cylindrical gears, when gear hot fitting and spline connection are used, the matching length between the gear and the reducer shaft is designed during the gear design process. The gear length should be slightly larger than the reducer shaft length, so that the gear end face cover plate can play a role.

6、外置蓋板與內(nèi)嵌蓋板的應(yīng)用

6. Application of External Cover Plate and Embedded Cover Plate

花鍵齒輪統(tǒng)一采取內(nèi)嵌蓋板，因為花鍵連接，本身減速機的軸已經(jīng)縮短。如果采取熱裝，盡可能選取外置蓋板，這樣可以縮短力臂，如果齒條安裝面空間有限再考慮內(nèi)置蓋板。

The spline gear adopts an embedded cover plate, as the shaft of the reducer itself has been shortened due to the spline connection. If hot installation is adopted, an external cover plate should be selected as much as possible to shorten the force arm. If the space for the rack installation surface is limited, an internal cover plate should be considered.

7、齒輪齒數(shù)

7. Number of gear teeth

在齒輪設(shè)計過程中，為了防止齒輪根切，一定要記住標(biāo)準(zhǔn)齒輪的少齒數(shù)，一般不采取少于少齒數(shù)的齒輪，如果一定要用少于少齒數(shù)的齒輪，需要合理計算變位系數(shù)。

In the process of gear design, in order to prevent gear undercutting, it is necessary to remember the minimum number of teeth of the standard gear. Generally, gears with less than a minimum number of teeth are not used. If it is necessary to use gears with less than a minimum number of teeth, it is necessary to calculate the modification coefficient reasonably.

齒輪齒條在設(shè)計過程中的注意事項就講解到這里了，希望能夠給您好的幫助，更多事項就來我們網(wǎng)站http://m.feicui77.cn咨詢！

That's all we need to pay attention to during the design process of gears and racks. We hope it can be helpful to you. For more details, please visit our website http://m.feicui77.cn consulting service