{"id":372,"date":"2023-06-20T09:48:55","date_gmt":"2023-06-20T09:48:55","guid":{"rendered":"https:\/\/physigeek.com\/pt\/prateleira\/"},"modified":"2023-06-20T09:48:55","modified_gmt":"2023-06-20T09:48:55","slug":"prateleira","status":"publish","type":"post","link":"https:\/\/physigeek.com\/pt\/prateleira\/","title":{"rendered":"Inaugura\u00e7\u00e3o de casa"},"content":{"rendered":"<p>Este artigo explica o que \u00e9 o mecanismo de cremalheira e pinh\u00e3o e para que \u00e9 usado. Voc\u00ea tamb\u00e9m encontrar\u00e1 as caracter\u00edsticas do mecanismo de cremalheira, bem como as vantagens e desvantagens deste tipo de mecanismo. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%C2%BFQue-es-el-mecanismo-pinon-cremallera\"><\/span> Qual \u00e9 o mecanismo de cremalheira e pinh\u00e3o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> O <strong>mecanismo de cremalheira<\/strong> \u00e9 um mecanismo que consiste em uma roda dentada (pinh\u00e3o) e uma barra dentada (cremalheira). O mecanismo de cremalheira e pinh\u00e3o \u00e9 usado para transformar o movimento circular do pinh\u00e3o em um movimento linear da cremalheira.<\/p>\n<p> Exemplos de aplica\u00e7\u00f5es do mecanismo de cremalheira s\u00e3o saca-rolhas, sistema de dire\u00e7\u00e3o de autom\u00f3veis, mecanismo de abertura e fechamento de portas de guindastes, ferrovias de cremalheira, alguns atuadores, etc. <\/p>\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere.jpg\" alt=\"\" class=\"wp-image-6703\" width=\"323\" height=\"192\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere-300x178.jpg 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere.jpg 493w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<p> O funcionamento do mecanismo de cremalheira e pinh\u00e3o consiste em converter o movimento rotacional do pinh\u00e3o em um movimento retil\u00edneo realizado pela cremalheira. Os dois elementos mec\u00e2nicos engrenam entre si, de modo que a rota\u00e7\u00e3o do pinh\u00e3o move a cremalheira para frente. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Partes-del-mecanismo-pinon-cremallera\"><\/span> Pe\u00e7as do mecanismo de cremalheira e pinh\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Basicamente, o mecanismo de cremalheira e pinh\u00e3o consiste em duas partes:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:18px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Pinh\u00e3o<\/strong> : \u00e9 a parte do mecanismo de cremalheira e pinh\u00e3o que realiza o movimento de rota\u00e7\u00e3o. \u00c9 uma roda dentada que engata na cremalheira. O pinh\u00e3o pode girar em ambos os sentidos de rota\u00e7\u00e3o poss\u00edveis, portanto, dependendo do sentido de rota\u00e7\u00e3o do pinh\u00e3o, a cremalheira se mover\u00e1 em uma dire\u00e7\u00e3o ou outra.<\/span><\/li>\n<li style=\"margin-bottom:18px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Cremalheira<\/strong> : parte do mecanismo de cremalheira e pinh\u00e3o que realiza movimento retil\u00edneo. \u00c9 uma barra r\u00edgida com dentes que avan\u00e7a conforme o pinh\u00e3o gira. Como o mecanismo da cremalheira \u00e9 revers\u00edvel, o movimento da cremalheira tamb\u00e9m pode girar o pinh\u00e3o, embora isso seja muito raro.<\/span> <\/li>\n<\/ul>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"370\" height=\"330\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere.png\" alt=\"Inaugura\u00e7\u00e3o de casa\" class=\"wp-image-6761\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere-300x268.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/cremaillere.png 370w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Caracteristicas-del-mecanismo-pinon-cremallera\"><\/span> Caracter\u00edsticas do mecanismo de cremalheira e pinh\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> O mecanismo de rack possui as seguintes caracter\u00edsticas:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:30px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>O mecanismo de cremalheira \u00e9 revers\u00edvel<\/strong> , ou seja, um movimento rotativo pode ser transformado em movimento retil\u00edneo, ou um movimento linear em movimento circular. Este tipo de mecanismo pode, portanto, ser utilizado de tal forma que o movimento de rota\u00e7\u00e3o do pinh\u00e3o provoque o movimento de avan\u00e7o da cremalheira, ou inversamente, que o movimento da cremalheira provoque a rota\u00e7\u00e3o do pinh\u00e3o. Geralmente, o pinh\u00e3o \u00e9 o elemento motriz e a cremalheira \u00e9 o elemento acionado.<\/span><\/li>\n<li style=\"margin-bottom:12px\"> <span style=\"color:#101010;font-weight: normal;\">Para que o mecanismo de cremalheira funcione corretamente, <strong>a cremalheira e o pinh\u00e3o devem ter o mesmo passo e, portanto, o mesmo m\u00f3dulo<\/strong> . Assim, o m\u00f3dulo do pinh\u00e3o e, portanto, do mecanismo, pode ser calculado dividindo o di\u00e2metro do pinh\u00e3o pelo seu n\u00famero de dentes.<\/span> <\/li>\n<p style=\"text-align:center; margin-bottom:12px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-e1d5a27203157a95b04f954535b96fdd_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m=\\cfrac{D}{Z}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"57\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:30px\"> <span style=\"color:#101010;font-weight: normal;\">Ouro<\/span><\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-fdc40b8ad1cdad0aab9d632215459d28_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"15\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o m\u00f3dulo,<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-c10ec9debc8ec5dce4c3c5887557202d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"D\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"15\" style=\"vertical-align: 0px;\"><\/p>\n<p> o di\u00e2metro da roda e<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-0be116875001706f29a24434bd0d91c9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Z\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: 0px;\"><\/p>\n<p> o n\u00famero de dentes da roda.<\/p>\n<li style=\"margin-bottom:12px\"> <span style=\"color:#101010;font-weight: normal;\">A cremalheira e o pinh\u00e3o t\u00eam seus dentes engrenados entre si, portanto, <strong>para cada revolu\u00e7\u00e3o completa do pinh\u00e3o, a cremalheira mover\u00e1 tantos dentes quanto o pinh\u00e3o tiver<\/strong> . Assim, a dist\u00e2ncia percorrida pela cremalheira pode ser calculada atrav\u00e9s da seguinte f\u00f3rmula:<\/span> <\/li>\n<p style=\"text-align:center; margin-bottom:12px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-b11a8508884c8df62e8a5fe31f00a2e1_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d=\\cfrac{Z}{n}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"49\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:30px\"> <span style=\"color:#101010;font-weight: normal;\">Ouro<\/span><\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-b7950117119e0530b9b4632250a915c5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"10\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a dist\u00e2ncia percorrida pelo z\u00edper,<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-0be116875001706f29a24434bd0d91c9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Z\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: 0px;\"><\/p>\n<p> o n\u00famero de dentes da roda e<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> o n\u00famero de dentes do z\u00edper por cent\u00edmetro.<\/p>\n<li style=\"margin-bottom:12px\"> <span style=\"color:#101010;font-weight: normal;\">Em um mecanismo de cremalheira e pinh\u00e3o, a velocidade de movimento da cremalheira \u00e9 igual \u00e0 velocidade angular do pinh\u00e3o vezes o di\u00e2metro do pinh\u00e3o dividido por dois.<\/span> <\/li>\n<p style=\"text-align:center; margin-bottom:12px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-674609cb2c5bcb1fed56422b605b415e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"V=\\omega\\cdot\\cfrac{D}{2}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"80\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:30px\"> <span style=\"color:#101010;font-weight: normal;\">Ouro<\/span><\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-54e215a7a583b4f357a5a627420bcf2f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"V\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a velocidade linear da cremalheira,<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-fbffdce91996e0a17795d82e8e6996d9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\omega\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a velocidade de rota\u00e7\u00e3o do pinh\u00e3o e<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-c10ec9debc8ec5dce4c3c5887557202d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"D\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"15\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o di\u00e2metro do pinh\u00e3o <\/p>\n<\/ul>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ventajas-y-desventajas-del-mecanismo-pinon-cremallera\"><\/span> Vantagens e desvantagens do mecanismo de cremalheira e pinh\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> <strong><u style=\"text-decoration-color:#4fd12f\">Vantagens do mecanismo de cremalheira e pinh\u00e3o:<\/u><\/strong><\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">O mecanismo de cremalheira e pinh\u00e3o \u00e9 muito simples, tornando-o adapt\u00e1vel e flex\u00edvel.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">Altas pot\u00eancias podem ser transmitidas com o mecanismo de cremalheira e pinh\u00e3o.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">Permite alterar o tipo de movimento, pois transforma um movimento rotativo em movimento linear, ou vice-versa.<\/span><\/li>\n<\/ul>\n<p> <u style=\"text-decoration-color:#4fd12f\"><strong>Desvantagens <u style=\"text-decoration-color:#4fd12f\">do mecanismo de rack<\/u> :<\/strong><\/u><\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">O mecanismo da cremalheira precisa ser lubrificado para seu bom funcionamento.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">Em geral, o mecanismo de cremalheira e pinh\u00e3o \u00e9 um sistema de transmiss\u00e3o de movimento ruidoso.<\/span><\/li>\n<li style=\"margin-bottom:16px\"> <span style=\"color:#101010;font-weight: normal;\">No mecanismo de cremalheira ocorre grande desgaste devido ao contato entre o pinh\u00e3o e a cremalheira.<\/span> <\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Aplicaciones-del-mecanismo-pinon-cremallera\"><\/span> Aplica\u00e7\u00f5es de mecanismo de cremalheira e pinh\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Na engenharia, o mecanismo de cremalheira e pinh\u00e3o tem muitas aplica\u00e7\u00f5es. Por exemplo, o mecanismo de cremalheira e pinh\u00e3o \u00e9 utilizado em saca-rolhas, no mecanismo de abertura e fechamento de algumas portas e at\u00e9 em furadeiras.<\/p>\n<p> Da mesma forma, no setor automobil\u00edstico, o mecanismo de cremalheira e pinh\u00e3o \u00e9 utilizado na dire\u00e7\u00e3o de autom\u00f3veis. Este mecanismo faz, portanto, parte do sistema que transmite o movimento do volante do ve\u00edculo \u00e0s rodas.<\/p>\n<p> Finalmente, outro uso frequente do mecanismo de cremalheira \u00e9 na \u00e1rea de transporte. Assim, as ferrovias de cremalheira utilizam o mecanismo de cremalheira para viajar em \u00e1reas montanhosas com declives acentuados.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Este artigo explica o que \u00e9 o mecanismo de cremalheira e pinh\u00e3o e para que \u00e9 usado. Voc\u00ea tamb\u00e9m encontrar\u00e1 as caracter\u00edsticas do mecanismo de cremalheira, bem como as vantagens e desvantagens deste tipo de mecanismo. Qual \u00e9 o mecanismo de cremalheira e pinh\u00e3o? O mecanismo de cremalheira \u00e9 um mecanismo que consiste em uma &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/physigeek.com\/pt\/prateleira\/\"> <span class=\"screen-reader-text\">Inaugura\u00e7\u00e3o de casa<\/span> Leia mais &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[10],"tags":[],"class_list":["post-372","post","type-post","status-publish","format-standard","hentry","category-maquinas-e-mecanismos"],"yoast_head":"<!-- This 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