{"id":1418,"date":"2021-11-07T19:34:15","date_gmt":"2021-11-07T19:34:15","guid":{"rendered":"https:\/\/krissmotors.com\/aero\/?p=1418"},"modified":"2021-11-19T19:10:56","modified_gmt":"2021-11-19T19:10:56","slug":"drive-train","status":"publish","type":"post","link":"https:\/\/krissmotors.com\/aero\/?p=1418","title":{"rendered":"Drive train"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Topics<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6ad8db2fa40bd\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6ad8db2fa40bd\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/krissmotors.com\/aero\/?p=1418\/#Background\" >Background<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/krissmotors.com\/aero\/?p=1418\/#Gear_shifting\" >Gear shifting<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/krissmotors.com\/aero\/?p=1418\/#Reversing_gearbox\" >Reversing gearbox<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Background\"><\/span>Background<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The extended length of the cyclecar requires a corresponding expansion segment in the primary drive shaft. In addition, to implement reverse functionality a new reversing gearbox assembly must inserted between the original gearbox output and the U-joint input in the <a href=\"https:\/\/krissmotors.com\/aero\/?p=1234\">swing arm<\/a>.<\/p>\n<div id=\"attachment_1419\" style=\"width: 1524px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/Drive-train.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1419\" src=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/Drive-train.png\" alt=\"\" width=\"1514\" height=\"963\" class=\"size-full wp-image-1419\" srcset=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/Drive-train.png 1514w, https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/Drive-train-330x210.png 330w, https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/Drive-train-1024x651.png 1024w, https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/Drive-train-768x488.png 768w\" sizes=\"auto, (max-width: 1514px) 100vw, 1514px\" \/><\/a><p id=\"caption-attachment-1419\" class=\"wp-caption-text\">Layout of extended drive train with reversing gearbox<\/p><\/div>\n<p>The gear shift mechanism must also be completely re-engineered in order to migrate from foot to hand control.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Gear_shifting\"><\/span>Gear shifting<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Like nearly all motorcycles, the <a href=\"https:\/\/krissmotors.com\/aero\/?p=713#Gear_shifter\" rel=\"noopener\" target=\"_blank\">Moto Guzzi gear shifting<\/a> is handled by a swivel foot pedal and a hand operated clutch. The original setup uses two swivel arms (one arm is the foot pedal) and three linkage bars to rotate the gear selector in the gearbox.<\/p>\n<p>The concept for switching to a hand-operated sequential shift lever uses a similar linkage arrangement.<\/p>\n<p><a href=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/shifter-mechanism.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/shifter-mechanism.png\" alt=\"\" width=\"938\" height=\"959\" class=\"aligncenter size-full wp-image-1424\" \/><\/a><\/p>\n<p>When the shift lever <strong>A<\/strong> is pushed forward, control arm <strong>B<\/strong> moves in the opposite direction (back towards the driver). This motion rotates a swivel <strong>C<\/strong> that pushes control arm <strong>D<\/strong> forward. Turning linkage then moves control arm <strong>E<\/strong> upwards, rotating the gear selector shaft that is a pivot point connected to the engine gearbox. Pulling the shift lever back causes the reverse action.<\/p>\n<p>This sequential shifter only handles forward gears and neutral. Reverse action must be independently triggered since this functionality is not incorporated into the original Guzzi gearbox.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Reversing_gearbox\"><\/span>Reversing gearbox<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Conceptually, a reversing gearbox deploys four identically toothed gears in a specific configuration. <\/p>\n<p><a href=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/reversing-gearbox.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/reversing-gearbox.png\" alt=\"\" width=\"789\" height=\"1006\" class=\"aligncenter size-full wp-image-1431\" srcset=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/reversing-gearbox.png 789w, https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/reversing-gearbox-259x330.png 259w, https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/reversing-gearbox-768x979.png 768w\" sizes=\"auto, (max-width: 789px) 100vw, 789px\" \/><\/a><\/p>\n<p>First two identical secondary gears are linked together but offset. Because they mesh one-to-one, their rotational direction will be opposite from each other. Two primary gears separated by a spacer are placed so that they can slide to engage either one of the two linked secondary gears. A shift mechanism moves the primary gear from the forward to the reverse position. The drive shaft passes through the primary gears.<\/p>\n<div id=\"attachment_1434\" style=\"width: 340px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/gearbox-R.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1434\" src=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/gearbox-R-330x287.png\" alt=\"\" width=\"330\" height=\"287\" class=\"size-medium wp-image-1434\" srcset=\"https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/gearbox-R-330x287.png 330w, https:\/\/krissmotors.com\/aero\/wp-content\/uploads\/2021\/11\/gearbox-R.png 373w\" sizes=\"auto, (max-width: 330px) 100vw, 330px\" \/><\/a><p id=\"caption-attachment-1434\" class=\"wp-caption-text\">Reversing gearbox concept with fill plug and shift link<\/p><\/div>\n<p>The reversing gearbox requires its own oil and has an independent shift mechanism &#8212; separate from the main engine gearbox &#8212; that will have linkage located in a reachable, but cannot-be-engaged-by-mistake location. <\/p>\n<p>Because there will be no reverse lights on the cyclecar, a beeper will be installed on the rear section of the chassis that is triggered by the reverse shift lever, much like a brake light switch. <\/p>\n<p>To operate, with the cyclecar in neutral, first the <em>reverse<\/em> position is selected and the beeper is switched on. Then, using the clutch, the main gearbox is shifted into first gear, but instead of moving forward, the vehicle will begin to move backwards. When motion is completed, the main gearbox is shifted back to neutral, and then the reverse position is returned to <em>forward<\/em>. At this point, the beeper stops.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Background The extended length of the cyclecar requires a corresponding expansion segment in the primary drive shaft. In addition, to implement reverse functionality a new reversing gearbox assembly must inserted between the original gearbox output and the U-joint input in the swing arm. The gear shift mechanism must also be completely&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":1421,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-1418","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"acf":[],"_links":{"self":[{"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=\/wp\/v2\/posts\/1418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1418"}],"version-history":[{"count":10,"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=\/wp\/v2\/posts\/1418\/revisions"}],"predecessor-version":[{"id":1593,"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=\/wp\/v2\/posts\/1418\/revisions\/1593"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=\/wp\/v2\/media\/1421"}],"wp:attachment":[{"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/krissmotors.com\/aero\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}