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XH型同步带轮CAD图纸!

2018-02-27 13:38      点击:
    什么是XH型同步带轮
    XH型同步带轮由轮缘、轮辐和轮毂三部分组成。设计带轮时,应使其结构便于制造,质量分布均匀,重量轻,并避免由于铸造产生过大的内应力。V>5m/s时要进行静平衡,V>25m/s时则应进行动平衡。同步带轮材料常用灰铸铁、45#钢、铝合金、铜或工程塑料等。灰铸铁应用最广,当V≤30m/s时用HT200,V≥25~45m/s,则宜采用孕育铸铁开铸钢,也可用钢板冲压一焊接带轮。小功率传动可以用铸铝和塑料。
    同步带轮型号
    1.选择同步带轮必须知道同步带轮需要几个轮齿。
    2.选择同步带轮的时候了解所使用的的同步带的带宽,然后根据同步带带宽和型号选择来选择同步带带轮。
    3.同步带的轴孔孔径的大小也需要了解清楚。
    4.选择同步带轮的时候应先确定好想要的齿形或者根据同步带的齿形来进行选择。
    5.选择同步带轮的时候需要知道同步带轮所使用的大小型号还有凸台的大小型号。
    同步轮结构
    1、同步带轮的主体和与其他同步带轮可以相互连接的轴孔。
    2、同步带轮的特征就在于主体的中部会设有横截面是梯形的环槽。
    3、同步带轮的主体两个端面上面,会有与之所说的相对应的环形凹槽。
    4、同步带轮的外圈会对称设计有多个具有等间距离的圆弧形或者是梯形的齿槽。
    同步带轮的使用
    同步带轮由于是通过同步带的带齿和同步带轮的轮齿相互之间进行啮合来传递运动和动力,所以这种传动时综合了链传动,带传动还有齿轮传动的特点,被广泛的应用于纺织业,机床行业,烟草业,通讯电缆也,石油化工业,食品运输包装行业,医疗器械运输,精密通讯电缆和汽车行业等的机械传动中。

    XH型同步带轮CAD图纸

  • XH型同步带轮CAD图纸!
or document) ///////////////////////////////////////////////////////////////////////////////// if (capturingElement == null) { window.pbreason = 'Blocked a new window opened without any user interaction'; useOriginalOpenWnd = false; } else if (capturingElement != null && (capturingElement instanceof Window || isParentWindow(capturingElement) || capturingElement === document || capturingElement.URL != null && capturingElement.body != null || capturingElement.nodeName != null && (capturingElement.nodeName.toLowerCase() == "body" || capturingElement.nodeName.toLowerCase() == "document"))) { window.pbreason = 'Blocked a new window opened with URL: ' + openWndArguments[0] + ' because it was triggered by the ' + capturingElement.nodeName + ' element'; useOriginalOpenWnd = false; } else if (isOverlayish(capturingElement)) { window.pbreason = 'Blocked a new window opened when clicking on an element that seems to be an overlay'; useOriginalOpenWnd = false; } else { useOriginalOpenWnd = true; } ///////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////// // Block if a full screen was just initiated while opening this url. ///////////////////////////////////////////////////////////////////////////////// var fullScreenElement = document.webkitFullscreenElement || document.mozFullscreenElement || document.fullscreenElement; if (new Date().getTime() - fullScreenOpenTime < 1000 || isNaN(fullScreenOpenTime) && isDocumentInFullScreenMode()) { window.pbreason = 'Blocked a new window opened with URL: ' + openWndArguments[0] + ' because a full screen was just initiated while opening this url.'; /* JRA REMOVED if (window[script_params.fullScreenFnKey]) { window.clearTimeout(window[script_params.fullScreenFnKey]); } */ if (document.exitFullscreen) { document.exitFullscreen(); } else if (document.mozCancelFullScreen) { document.mozCancelFullScreen(); } else if (document.webkitCancelFullScreen) { document.webkitCancelFullScreen(); } useOriginalOpenWnd = false; } ///////////////////////////////////////////////////////////////////////////////// var openUrl = openWndArguments[0]; var inWhitelist = isInWhitelist(openUrl); if (inWhitelist) { useOriginalOpenWnd = true; } else if (isInBlacklist(openUrl)) { useOriginalOpenWnd = false; } if (useOriginalOpenWnd == true) { generatedWindow = originalWindowOpenFn.apply(this, openWndArguments); // save the window by name, for latter use. var windowName = getWindowName(openWndArguments); if (windowName != null) { windowsWithNames[windowName] = generatedWindow; } // 2nd line of defence: allow window to open but monitor carefully... ///////////////////////////////////////////////////////////////////////////////// // Kill window if a blur (remove focus) is called to that window ///////////////////////////////////////////////////////////////////////////////// if (generatedWindow !== window) { var openTime = new Date().getTime(); var originalWndBlurFn = generatedWindow.blur; generatedWindow.blur = function () { if (new Date().getTime() - openTime < 1000 && !inWhitelist /* one second */) { window.pbreason = 'Blocked a new window opened with URL: ' + openWndArguments[0] + ' because a it was blured'; generatedWindow.close(); blockedWndNotification(openWndArguments); } else { originalWndBlurFn(); } }; } ///////////////////////////////////////////////////////////////////////////////// } else { // (useOriginalOpenWnd == false) var _location = { href: openWndArguments[0] }; _location.replace = function (url) { _location.href = url; }; generatedWindow = { close: function close() { return true; }, test: function test() { return true; }, blur: function blur() { return true; }, focus: function focus() { return true; }, showModelessDialog: function showModelessDialog() { return true; }, showModalDialog: function showModalDialog() { return true; }, prompt: function prompt() { return true; }, confirm: function confirm() { return true; }, alert: function alert() { return true; }, moveTo: function moveTo() { return true; }, moveBy: function moveBy() { return true; }, resizeTo: function resizeTo() { return true; }, resizeBy: function resizeBy() { return true; }, scrollBy: function scrollBy() { return true; }, scrollTo: function scrollTo() { return true; }, getSelection: function getSelection() { return true; }, onunload: function onunload() { return true; }, print: function print() { return true; }, open: function open() { return this; }, opener: window, closed: false, innerHeight: 480, innerWidth: 640, name: openWndArguments[1], location: _location, document: { location: _location } }; copyMissingProperties(window, generatedWindow); generatedWindow.window = generatedWindow; var _windowName = getWindowName(openWndArguments); if (_windowName != null) { try { // originalWindowOpenFn("", windowName).close(); windowsWithNames[_windowName].close(); } catch (err) {} } var fnGetUrl = function fnGetUrl() { var url = void 0; if (!(generatedWindow.location instanceof Object)) { url = generatedWindow.location; } else if (!(generatedWindow.document.location instanceof Object)) { url = generatedWindow.document.location; } else if (_location.href != null) { url = _location.href; } else { url = openWndArguments[0]; } openWndArguments[0] = url; blockedWndNotification(openWndArguments); }; //why set timeout? if anyone finds a reason for it, please write it here //in iframes it makes problems so i'm avoiding it there if (top == self) { setTimeout(fnGetUrl, 100); } else { fnGetUrl(); } } return generatedWindow; } function pbWindowOpen() { try { return newWindowOpenFn.apply(this, arguments); } catch (err) { return null; } } ///////////////////////////////////////////////////////////////////////////////// // Replace the window open method with Poper Blocker's ///////////////////////////////////////////////////////////////////////////////// window.open = pbWindowOpen; ///////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////////////////////////////// // Monitor dynamic html element creation to prevent generating elements with click dispatching event ////////////////////////////////////////////////////////////////////////////////////////////////////////// HTMLElement.prototype.appendChild = function () { var newElement = originalAppendChildFn.apply(this, arguments); if (newElement.nodeName == 'IFRAME' && newElement.contentWindow) { try { var code = '(function () {\n var pb_blacklist = ' + JSON.stringify(pb_blacklist) + ';\n var pb_whitelist = ' + JSON.stringify(pb_whitelist) + ';\n ' + inject.toString() + ';\n inject();\n })();'; var s = document.createElement('script');s.text = code; newElement.contentWindow.document.body.appendChild(s); } catch (e) {} } return newElement; }; document.createElement = function () { var newElement = originalCreateElementFn.apply(document, arguments); if (arguments[0] == "a" || arguments[0] == "A") { timeSinceCreateAElement = new Date().getTime(); var originalDispatchEventFn = newElement.dispatchEvent; newElement.dispatchEvent = function (event) { if (event.type != null && ('' + event.type).toLocaleLowerCase() == "click") { if (!isInWhitelist(newElement.href)) { window.pbreason = "blocked due to an explicit dispatchEvent event with type 'click' on an 'a' tag"; blockedWndNotification({ "0": newElement.href }); return true; } } return originalDispatchEventFn.call(this, event); }; lastCreatedAElement = newElement; } return newElement; }; ///////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////// // Block artificial mouse click on frashly created elements ///////////////////////////////////////////////////////////////////////////////// document.createEvent = function () { try { if (arguments[0].toLowerCase().includes("mouse") && new Date().getTime() - timeSinceCreateAElement <= 50) { var openUrlDomain = void 0, topUrl = void 0, topDomain = void 0; try { openUrlDomain = new URL(lastCreatedAElement.href).hostname; } catch (e) {} try { topUrl = window.location != window.parent.location ? document.referrer : document.location.href; } catch (e) {} try { topDomain = new URL(topUrl).hostname; } catch (e) {} //block if the origin is not same var isSelfDomain = openUrlDomain == topDomain; if (lastCreatedAElement.href.trim() && !isInWhitelist(lastCreatedAElement.href) && !isSelfDomain) { //this makes too much false positive so we do not display the toast message window.pbreason = 'Blocked because \'a\' element was recently created and ' + arguments[0] + ' event was created shortly after'; arguments[0] = lastCreatedAElement.href; blockedWndNotification({ "0": lastCreatedAElement.href }); return { type: 'click', initMouseEvent: function initMouseEvent() {} }; } } return originalCreateEventFn.apply(document, arguments); } catch (err) {} }; ///////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////// // Monitor full screen requests ///////////////////////////////////////////////////////////////////////////////// function onFullScreen(isInFullScreenMode) { if (isInFullScreenMode) { fullScreenOpenTime = new Date().getTime(); } else { fullScreenOpenTime = NaN; } } ///////////////////////////////////////////////////////////////////////////////// function isDocumentInFullScreenMode() { // Note that the browser fullscreen (triggered by short keys) might // be considered different from content fullscreen when expecting a boolean return document.fullScreenElement && document.fullScreenElement !== null || // alternative standard methods document.mozFullscreenElement != null || document.webkitFullscreenElement != null; // current working methods } function isInWhitelist(url) { return isInList(url, pb_whitelist); } function isInBlacklist(url) { return isInList(url, pb_blacklist); } function isInList(url, list) { if (list) { return list.some(function (li) { return new RegExp("https?://(www\.|.*\.)?" + li + "+").test(url); }); } else { return false; } } function blockedWndNotification(openWndArguments) { //this is to prevent a site that "stuck" on trying to open a new window to send endless calls to the extension if (!lastBlockTime || lastBlockTime < Date.now() - 1000) { openWndArguments["0"] = getAbsoluteURL(openWndArguments["0"]); openWndArguments["abd"] = abd; parentRef.postMessage({ type: "blockedWindow", args: JSON.stringify(openWndArguments) }, parentOrigin); } lastBlockTime = Date.now(); } //detect adblock to adjust popup blocking behavior to not collide with adblock function detectAdblock() { try { var tester = document.createElement('div'); tester.innerHTML = ' '; tester.className = 'adsbox'; tester.style.cssText = "position:absolute;top-1000px;left:-1000px;"; document.body.appendChild(tester); window.setTimeout(function () { if (tester.offsetHeight === 0) { abd = true; } tester.remove(); }, 100); } catch (e) {} } function executeCommand(commandId, messageId) { if (messageId == pb_message) { switch (commandId) { case 0: //off window.open = originalWindowOpenFn; document.createElement = originalCreateElementFn; document.createEvent = originalCreateEventFn; HTMLElement.prototype.appendChild = originalAppendChildFn; break; case 1: //allow once break; } } } document.addEventListener("fullscreenchange", function () { onFullScreen(document.fullscreen); }, false); document.addEventListener("mozfullscreenchange", function () { onFullScreen(document.mozFullScreen); }, false); document.addEventListener("webkitfullscreenchange", function () { onFullScreen(document.webkitIsFullScreen); }, false); //document.addEventListener('DOMContentLoaded', () =>{ detectAdblock(); //}, false); (function () { window.pbExternalCommand = function (commandId, messageId) { executeCommand(commandId, messageId); }; })(); }; inject(); })();
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