正时齿形链结构逆向设计
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1 正时齿形链<span style="color: black;">归类</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">日前</span>正时齿形链的<span style="color: black;">制品</span>和规格繁多,<span style="color: black;">一般</span><span style="color: black;">根据</span>啮合机制的<span style="color: black;">区别</span>,</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">分为外啮合圆销式齿形链、内啮合圆销式齿形链和内-外复合啮合圆</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">销式齿形链;<span style="color: black;">根据</span>齿形链导板结构形式可分为外导式齿形链和内导式</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">齿形链(此规范中只介绍外导式齿形链);<span style="color: black;">根据</span>导板形状可分为普通</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">导板齿形链、蝴蝶状导板齿形链。<span style="color: black;">根据</span><span style="color: black;">根据</span><span style="color: black;">日前</span>我公司接触最多的是</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">外啮合齿形链和内-外符合啮合式齿形链。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1.1 外啮合圆销式齿形链</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">外啮合齿形链是链板以外侧齿廓与链轮轮齿接触的齿形链,如图</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1-1 所示。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">外啮合的特点是:链板的工作边是外侧直线齿廓,外侧直线齿廓</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">与链轮轮齿的啮合定位稳定。<span style="color: black;">然则</span><span style="color: black;">因为</span>啮合定位是瞬时完成的,<span style="color: black;">因此呢</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">多边形效应较严重,冲击和振动<span style="color: black;">很强</span>,噪声<span style="color: black;">很强</span>,磨损较严重。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/938482c5e05c4b53a3bf03491f7c92a7~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=%2BwgngaqJW96910upzKY%2FDpkLRYk%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">图 1-1 外啮合齿形链传动示意图</p>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1.2 内啮合圆销式齿形链</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">内啮合圆销式齿形链是工作链板以内侧齿廓与链轮齿接触的齿</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">形链,如图 1-2 所示。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">内啮合的特点是:工作边是内侧外凸齿廓;从端面看,工作边和链轮</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">轮齿是点接触,并且接触点<span style="color: black;">逐步</span>移动,因而接触部分有<span style="color: black;">很强</span>的相对滑</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">动,接触面积较小,链板的工作边和链轮的工作齿面磨损<span style="color: black;">很强</span>。<span style="color: black;">然则</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">因为</span>减小了链条多边形效应中的横向跳动,因而振动减轻,传动<span style="color: black;">安稳</span>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">然则</span>内啮合齿形链的最后定位是以内侧齿廓与链轮轮齿接触定</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">位的,<span style="color: black;">由于</span>定位<span style="color: black;">不足</span>稳定。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/e3c0449239ed43bfb4c6439c72e02770~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=sP6Fh5HKm0R1Vq%2FsEFVo6HrloC8%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">图 1-2 内啮合齿形链传动示意图</p>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1.3 内-外复合啮合圆销式齿形链</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">内-外复合啮合齿形链是一种新型齿形链,<span style="color: black;">亦</span>是<span style="color: black;">日前</span>汽车正时链设</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">计选型中优先选则的一种齿形链,如图 1-3 所示。这种齿形链的结构</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">型式和新齿形链决定了在齿形链传动过程中与主动链轮啮入时,外凸</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">的内侧曲线齿廓<span style="color: black;">首要</span>实现的是与其一个轮齿的内啮合,随着相邻连接</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">转角的增大,<span style="color: black;">逐步</span>由内啮合过渡到外啮合,当相邻链节转角为 2π/z</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">时,工作链板以外侧直线齿廓与链轮轮齿渐开线齿廓接触定位,实现</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">了内-外复合啮合机制。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/9e942211944041c0b4ea72a2385cf9ae~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=Wb5JoN05QwrVf0tRnaDiSlECeeA%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">图 1-3 内-外复合啮合齿形链传动示意图</p>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1.4 齿形链结构型式示意图</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/1d0b723710c44fde8f4f91a34994e4bb~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=xV9lO%2FL2E3lUeI1YwsDq71Hu0Ac%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">图 1-4 5(2×3)片式齿形链结构型式示意图</p>
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">日前</span>汽车正时齿形链<span style="color: black;">平常</span>的链板组合形式有 5(2×3)片、7</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(3×4)片、9(4×5)片、11(5×6)片、13(6×7)片式。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2 齿形链参数设计</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.1 外啮合齿形链参数设计</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.1.1 工作链板</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p26-sign.toutiaoimg.com/pgc-image/781cab83b48c42a68d2c66b0a86637e7~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=AEaIvQz2lcRfzEETJy6W%2Bo0quB4%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">图 2.1.1 外啮合圆销式齿形链工作链板</p>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">如图 2.1.1 所示,外啮合圆销式齿形链工作链板的<span style="color: black;">重点</span>参数为:</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">孔心距、边心距、齿形半角为。其内侧齿廓不参与啮合,因而其</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">齿廓曲线<span style="color: black;">能够</span>是直线,<span style="color: black;">亦</span><span style="color: black;">能够</span>是内凹的曲线。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(1) 孔心距</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">一般</span>可取工作链板的孔心距 = − ,为齿形链节距(mm),</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">为链板孔与销轴的双边间隙(mm)。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">这儿</span>所说的孔心距<span style="color: black;">指的是</span>热处理后的<span style="color: black;">最后</span>尺寸,而热处理前</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">的孔心距 0 <span style="color: black;">能够</span><span style="color: black;">按照</span>基本节距的<span style="color: black;">区别</span>,取 0 = −</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(0.005~0.015),小节距者取较小值。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(2) 边心距</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">当<9.525时, = 0.4 ;当 ≥ 9.525时, =</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">0.375。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(3) 齿形半角</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">一般</span>可取齿形角2 = 60°。特殊需要时,<span style="color: black;">亦</span>可取齿形角</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2 = 65°或 70°。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.1.2 导板</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/82b4e39616394318ba2e448440358182~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=Si51jBNF1gR0AcOBJ8nGCHaLNyk%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">图 2.1.2 外啮合齿形链导板</p>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">如图 2.1.2 所示,外啮合圆销式齿形链导板的<span style="color: black;">重点</span>参数为:孔心</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">距、边心距、齿形半角为。其<span style="color: black;">功效</span>是<span style="color: black;">保准</span>链条横向稳定性。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(1) 孔心距 a</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">一般</span>可取工作链板的孔心距 = 。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(2) 边心距</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">当<9.525时, = 0.4 ;当 ≥ 9.525时, =</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">0.375。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(3) 齿形半角</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">一般</span>可取齿形角2 = 60°。特殊<span style="color: black;">需求</span>时,<span style="color: black;">亦</span>可取齿形角</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2 = 65°或 70°。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.2 新型内-外复合啮合齿形链参数设计</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">图 2.2 新型内-外复合啮合齿形链的结构型式</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.2.1 工作链板</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">新型齿形链具有"宽腰型"和"窄腰型"两种<span style="color: black;">区别</span>形式的工作链</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">板,其内侧工作齿廓是外凸的曲线,如图 2.2.1 所示。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/b9a9a23d666545af9f2ca914dec69e88~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=2M9%2FGzMg1NLqzYeT25V0QTYKlr4%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(a)宽腰型</p>
</div>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/ea1b782e48074e9ebbb60be618816e75~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=SVAgdIGZeXdlqYPf%2FpIpPcF93d4%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(b)窄腰型</p>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">其<span style="color: black;">重点</span>参数有:孔心距、边心距、齿形半角、伸出量、内侧</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">工作齿廓曲率半径 、内侧工作齿廓曲率中心的坐标( , )、分叉口</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">高度ℎ等。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(1) 孔心距</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">一般</span>可取工作链板的孔心距 = − ,为齿形链节距(mm),</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">为链板孔与销轴的双边间隙(mm)。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">这儿</span>所说的孔心距<span style="color: black;">指的是</span>热处理后的<span style="color: black;">最后</span>尺寸,而热处理前</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">的孔心距 0 <span style="color: black;">能够</span><span style="color: black;">按照</span>基本节距的<span style="color: black;">区别</span>,取 0 = −</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(0.005~0.015),小节距者取较小值。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(2) 边心距</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">针对</span>宽腰型工作链板,其边心距 = 0.4;<span style="color: black;">针对</span>窄腰型工作</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">链板,其边心距 = 0.355。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">市场上的各大链条厂为了追求其"个性化"发展,内-外复</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">合啮合齿形链的边心距取值<span style="color: black;">亦</span>在<span style="color: black;">持续</span>的变化。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">针<span style="color: black;">针对</span>内啮合齿形链,宽腰型边心距<span style="color: black;">一般</span>可取 = 0.385 ,</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">窄腰型 = 0.34.</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(3) 齿形半角</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">一般</span>可取齿形角2 = 60°。特殊需要时,<span style="color: black;">亦</span>可取齿形角</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2 = 65°、70°或其他数值。<span style="color: black;">由于</span>市场上的各厂家设计的</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">初衷<span style="color: black;">区别</span>,还需<span style="color: black;">按照</span><span style="color: black;">实质</span>测绘出的值进行设定。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(4) 内侧工作齿廓曲率半径</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">内侧工作齿廓曲率半径需<span style="color: black;">按照</span>对应的链轮齿数 z,对应于齿</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">形角(链轮的压力角)的渐开线曲率半径,即 = 进</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">行设定取值,其中 为渐开线基圆半径。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/637f5a9d4c6e4fa3be55375925de57d3~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=twFBu7pp4JTqgvzmOagZz7DmEUI%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">表 2.2.1-1 常用宽腰型齿形链内侧工作齿廓曲率半径</p>
</div>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/ed50a7d58c764bc793d6b40d1b41ece2~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1729504017&x-signature=UT1KL4vzrdiWdv%2FqgGw7GKSfo0M%3D" style="width: 50%; margin-bottom: 20px;">
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">表 2.2.1-2 常用窄腰型齿形链内侧工作齿廓曲率半径</p>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">以上</span>给出的内侧工作齿廓曲率半径 是在工程中实用的综合曲率半径。适度的增大其数值,有利于<span style="color: black;">同期</span>参与啮合的链轮齿数与链节数,改善其受力状态。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(5) 伸出量</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">一般</span>随着节距的增大而增大,随着链轮齿数的<span style="color: black;">增多</span>而减小。<span style="color: black;">通常</span>可取 = 0.1~0.3,节距较小且齿数较多时取较小值,节距<span style="color: black;">很强</span>且齿数较少时取<span style="color: black;">很强</span>值。当取值一<span style="color: black;">按时</span>,内-外复合啮合齿形链与链轮啮合时,所适用的链轮齿数有一个最大限制值 。它<span style="color: black;">能够</span><span style="color: black;">经过</span>相邻链节转过 <span style="color: black;">方向</span>时,伸出量<span style="color: black;">是不是</span>"缩"回去而转变为外啮合来进行检验,这<span style="color: black;">亦</span>是新型齿形链实现内-外复合啮合的必要<span style="color: black;">要求</span>。否则,实现的是内啮合机制。<span style="color: black;">重视</span>,<span style="color: black;">针对</span>同一节距的新型齿形链,当其用于<span style="color: black;">区别</span>的发动机上</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">时,需<span style="color: black;">根据</span>链轮齿数 和 来设计,<span style="color: black;">选择</span>最佳伸出量,以满足<span style="color: black;">区别</span>的工况<span style="color: black;">需求</span>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(6) 内侧工作齿廓曲率中心的坐标 , ,已知边心距、内侧工</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">作齿廓曲率半径 、伸出量,齿形半角,公式如下:</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"> =( − − ) 90° − + </p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"> =( − − ) 90° − + </p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">一般</span> = 8°~11°。当取值较小时,内侧工作齿廓与链轮轮齿</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">的啮合区上移;当取值<span style="color: black;">很强</span>时,其啮合往下移。因而宽腰型齿形链</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">的应取<span style="color: black;">很强</span>值,窄腰型齿形链的应取较小值,并<span style="color: black;">经过</span>计算机仿真来</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">进一步验证其<span style="color: black;">恰当</span>性。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(7) 分叉口高度ℎ</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">针对</span>宽腰型齿形链,当节距 = 6.35~12.7时,随着节距</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">的增大,其分叉口高度ℎ = 0.65~2.25。<span style="color: black;">针对</span>窄腰型齿形链,当节距 =</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">7.62~12.7时,随着节距的增大,其分叉口高度ℎ = 0.4~1。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">注:<span style="color: black;">针对</span>普通齿形链的分叉口高度可查 GB10855-2016 等标准。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.2.2 导板</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">内-外复合啮合齿形链普通导板的基本形式与外啮合<span style="color: black;">同样</span>。</p>
论坛是一个舞台,让我们在这里尽情的释放自己。
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