2077 DC型可調(diào)式帶式輸送機(jī)設(shè)計(jì)

2077 DC型可調(diào)式帶式輸送機(jī)設(shè)計(jì),dc,調(diào)式,輸送,設(shè)計(jì) 1正文:文獻(xiàn)來(lái)源：美國(guó)專利專利號(hào)：US 6，607，074 B2專利時(shí)間 ：2003，8，19摘要這是個(gè)關(guān)于礦山作業(yè)用鏈條刮板輸送設(shè)備的驅(qū)動(dòng)系統(tǒng)，驅(qū)動(dòng)軸通過(guò)法蘭安裝在機(jī)架上，法蘭通過(guò)可調(diào)位置的孔安裝在驅(qū)動(dòng)機(jī)架上。法蘭包括一個(gè)外側(cè)的垂直側(cè)板和一個(gè)驅(qū)動(dòng)邊的隔板。在法蘭上有橢圓形的槽和螺栓，可以在 U 型槽上移動(dòng)位置，其中還有一個(gè)圓形的框架來(lái)安裝，通過(guò)這些可以很好的連接在機(jī)架上。礦山用鏈板輸送機(jī)驅(qū)動(dòng)系統(tǒng)本發(fā)明是關(guān)于礦山作業(yè)用鏈條刮板輸送設(shè)備的驅(qū)動(dòng)系統(tǒng)。該鏈條刮板輸送設(shè)備驅(qū)動(dòng)系統(tǒng)包括機(jī)架及輸送機(jī)基礎(chǔ)。由驅(qū)動(dòng)軸及垂直側(cè)板組成的可更換驅(qū)動(dòng)系統(tǒng)安裝在機(jī)架上。驅(qū)動(dòng)軸裝有鏈板以傳遞扭矩。驅(qū)動(dòng)軸上至少一個(gè)垂直側(cè)板帶有法藍(lán)連接，與驅(qū)動(dòng)單元通過(guò)聯(lián)軸器法藍(lán)相連，將動(dòng)力傳遞到驅(qū)動(dòng)軸。上述驅(qū)動(dòng)系統(tǒng)如圖 De39 23 32A1 所示。在這個(gè)驅(qū)動(dòng)系統(tǒng)中的法蘭安裝區(qū)按上法蘭盤(pán)，再加上一個(gè)液壓汽缸的張緊裝置，就可以把系統(tǒng)拉緊了。根據(jù)個(gè)人的生產(chǎn)目的，生產(chǎn)條件，申請(qǐng)地點(diǎn)的輸送要求，使用不同的鏈條鏈輪和不同直徑的傳動(dòng)軸，特別是鏈條鏈輪與不同的齒數(shù)配合。因此，在國(guó)標(biāo)中劃分了標(biāo)準(zhǔn)的刮板鏈條直徑，30 毫米，34 毫米，38 毫米或者 42 毫米。在最近一次申請(qǐng)中 48 毫米的鏈條申請(qǐng)成功了。對(duì)于每一個(gè)環(huán)節(jié)配備了 6 到 7 個(gè)齒來(lái)匹配鏈輪。在這項(xiàng)技術(shù)中一般都習(xí)慣提供一個(gè)尺寸合適的機(jī)器框架給軸和鏈輪，使該工程中的同一類型的輸送機(jī)可以使用所有類型的軸和鏈輪。輸送板基本上是定在一個(gè)固定的高度上，通過(guò)聯(lián)軸器的耦合，從一個(gè)驅(qū)動(dòng)系統(tǒng)到另一個(gè)驅(qū)動(dòng)系統(tǒng)，從底部運(yùn)行的傳送帶到前運(yùn)行的輸送帶，反著驅(qū)動(dòng)也行。本發(fā)明已表明對(duì)不同的驅(qū)動(dòng)系統(tǒng)可以選擇不同直徑的軸來(lái)降低成本。2因此本發(fā)明是針對(duì)那些已經(jīng)訂好驅(qū)動(dòng)系統(tǒng)規(guī)格的，其中傳送板上提供了很多位置來(lái)放驅(qū)動(dòng)軸，位置的高度和間隔可以調(diào)節(jié)，軸兩邊可以通過(guò)聯(lián)軸器和外側(cè)的驅(qū)動(dòng)裝置固定。該發(fā)明已經(jīng)基本確認(rèn)中心軸線上的驅(qū)動(dòng)軸相差幾厘米就是不同的鏈輪。舉例來(lái)說(shuō)，對(duì)于 SPR5 輸送機(jī)驅(qū)動(dòng)系統(tǒng)中鏈輪傳動(dòng)軸的變化只有 40 毫米的最低裝配位置（如與刮板鏈條/鏈條鏈輪 34x108/7 顆）和最高裝配位置（與刮板鏈條/鏈條鏈輪 30x108/7 顆） 。通過(guò)應(yīng)用調(diào)整側(cè)板可以消除高度差異。高度差異在這里只影響傳動(dòng)軸和驅(qū)動(dòng)軸。根據(jù)這個(gè)發(fā)明傳動(dòng)軸和傳動(dòng)裝置之間的相對(duì)位置耦合到傳動(dòng)軸仍然是相同的。在法蘭安裝區(qū)的不同高度上的比較大的偏移會(huì)經(jīng)過(guò)張緊裝置調(diào)整好。但是這個(gè)傳動(dòng)軸和調(diào)整側(cè)板上有一個(gè)伸長(zhǎng)孔。其中可以用緊固螺釘把它連在法蘭安裝區(qū)。細(xì)長(zhǎng)孔表示調(diào)整側(cè)板可以固定在任意中間位置，根據(jù)本發(fā)明調(diào)整側(cè)板可以廣泛應(yīng)用于任何驅(qū)動(dòng)系統(tǒng)。有利于伸長(zhǎng)孔定最高高度調(diào)節(jié)范圍。特別指出如果驅(qū)動(dòng)系統(tǒng)有張緊框架，即張緊框架部分具有法蘭安裝區(qū)，緊固調(diào)整側(cè)板，并有很多傳動(dòng)軸，那么拉動(dòng)機(jī)座的最好方法是液壓缸。機(jī)框部分是此配置中首選的，它提供了一個(gè)拖拽板。一個(gè)典型的刮板輸送機(jī)驅(qū)動(dòng)系統(tǒng)，按照本發(fā)明，現(xiàn)用下面的所附圖紙來(lái)說(shuō)明，其中：圖 1 顯示按照本發(fā)明的這個(gè)驅(qū)動(dòng)系統(tǒng)與調(diào)整側(cè)板和法蘭安裝區(qū)的透視圖。圖 2 顯示驅(qū)動(dòng)系統(tǒng)和兩個(gè)法蘭安裝區(qū)。圖 3 顯示去掉法蘭安裝區(qū)后的驅(qū)動(dòng)系統(tǒng)。圖 4A 透視圖顯示調(diào)整側(cè)板上的設(shè)置中調(diào)，環(huán)形圓盤(pán)板及緊固螺釘。圖 4B 透視圖顯示調(diào)整側(cè)板環(huán)形盤(pán)板和緊固螺釘?shù)淖罡咦畹臀恢谩D 5 顯示調(diào)整側(cè)板側(cè)視圖。圖 6 垂直顯示環(huán)形片。圖 7 橫向顯示調(diào)整側(cè)板。圖 8 側(cè)視圖顯示驅(qū)動(dòng)系統(tǒng)與傳動(dòng)軸在不同位置的安裝。在圖 1 驅(qū)動(dòng)和張緊系統(tǒng)是參照 10 的整體，它是適用于頭部的最后一鏈刮板輸送機(jī)，并沒(méi)有表現(xiàn)出更多，該申請(qǐng)作為一個(gè)單向輸送在一個(gè)地方提取的運(yùn)3作和舉例形式以所謂輔助驅(qū)動(dòng)該單向輸送的原則，建設(shè)鏈條刮板輸送機(jī)，而不是顯示的那樣，它形成了由輸送帶平底板放在一起，其中刮板鏈條是引導(dǎo)著的。形成一個(gè)張緊系統(tǒng) 10 的有兩部分，機(jī)車(chē)架 1 與機(jī)架機(jī)座和其后方一個(gè)張緊框架第 3 部分。機(jī)器框架 2，有固定的垂直側(cè)板 4 ，其外層兩邊兩個(gè)液壓缸 5 推動(dòng)張緊框架第 3 部分接頭。之間的側(cè)板 4 機(jī)床基座 2 輸送機(jī)板 6 是安排在一個(gè)固定的位置。 在張緊框架第 3 部分機(jī)框 1 傳動(dòng)軸 9 展開(kāi)，其中有兩個(gè)鏈條鏈輪 8 雙刮板鏈條。該傳動(dòng)軸 9 完成與扭矩固定鏈條鏈輪 8 加入它可組合或拆解作為一個(gè)裝配單元，通過(guò)公開(kāi)頭部 11 至之前圖 1 機(jī)器骨架。傳動(dòng)軸九通過(guò)兩個(gè)軸承設(shè)置在軸承座 12 ，而軸承座本身是被推到一個(gè)窗口，如軸承箱在自由的高度連接 13和 14。在右手邊的軸銷 15 的驅(qū)動(dòng)軸 9 圖 1 位于自由和不延伸到 16 ，這是形成于外側(cè)，側(cè)板 18 形成一個(gè)法蘭安裝區(qū) 17 。左側(cè)軸銷，在圖 1 是加入扭矩固定到一個(gè)耦合插座 19，其中延伸，通過(guò)耦合通過(guò) 16 在左手邊的側(cè)板 18，并擴(kuò)大了傳動(dòng)軸九直至到達(dá)調(diào)整側(cè)板 50 。建造該調(diào)整側(cè)板 50，將進(jìn)一步詳細(xì)解釋了下文。與上，下套 13， 14 和側(cè)板 18 與中間的法蘭安裝區(qū) 17 ，基本上是 U 形件。21 的安排，產(chǎn)生足夠的空間，為傳動(dòng)軸 9 作為一個(gè)裝配單元與軸端銷 15 連接。圖 1 進(jìn)一步表示法蘭安裝區(qū) 17 對(duì)外側(cè)的側(cè)板 18，每個(gè)有幾個(gè)，在這里 6個(gè)，鉆孔 20 個(gè)，以加強(qiáng)聯(lián)軸器經(jīng)過(guò) 16 以及作為設(shè)置鍵槽 22 載列并行，以輸送帶基座 6 ，延伸至后緣法蘭安裝區(qū) 17 。之間的輸送基座 6 和傳動(dòng)軸九被連上的一個(gè)可交換 23 與連鎖是張緊框架第 3 部分，并和基座 24 在拉緊的刮板鏈條，而不是如圖所示） 。運(yùn)行中的情況，為刮削器和刮板鏈條對(duì)鏈輪 8，因此，張緊框架第 3 部分相對(duì)于機(jī)架基座 2 總是相同的。調(diào)整側(cè)板 50 據(jù)發(fā)明是具體解釋下面，參考了進(jìn)一步的數(shù)字。圖 2 和圖 3顯示調(diào)整側(cè)板 50 在組裝條件對(duì)徑系統(tǒng) 10 。該傳動(dòng)軸與鏈輪，將組裝對(duì)傳動(dòng)軸軸線，沒(méi)有顯示。調(diào)整側(cè)板 50 有一個(gè)大規(guī)模的，約 7 厘米厚的底板 51 ，其中有一臺(tái)機(jī)器框架邊內(nèi)側(cè) 52 和傳動(dòng)側(cè)外側(cè) 53 。底板 51 在這里有 20 鉆孔，在法蘭安裝區(qū) 17，共有六個(gè)垂直于加強(qiáng)細(xì)長(zhǎng)孔，其中 4 個(gè)細(xì)長(zhǎng)孔在 54，切出 60 和4兩個(gè)拉長(zhǎng)孔 55 安排在另一邊的 60。加長(zhǎng)孔 54 ， 55 通過(guò)由緊固螺釘 56 和 57 ，在法蘭安裝區(qū)由螺母 58 可以適當(dāng)?shù)財(cái)Q入鉆孔 20 。加長(zhǎng)孔 54 和 55 ，均接近上，下側(cè)邊緣調(diào)整側(cè)板 50，使一個(gè)即使是收緊調(diào)整側(cè)板 50，促成圍繞削減了60 和聯(lián)軸器經(jīng)過(guò) 16 。正如圖 2 顯示，61 和螺絲 56 做出正面接觸，在一個(gè)時(shí)段有 25 分是在一面?zhèn)劝?18 ，而 58 到壩肩與側(cè)板 18 代表上層調(diào)整側(cè)板 50。 從圖 4 a 和圖 4B 來(lái)看，調(diào)整側(cè)板根據(jù)這項(xiàng)發(fā)明是最好的。區(qū)別圖 4 a 和圖 4B 組成的位置設(shè)置關(guān)鍵 30 ，相對(duì)位置的緊固螺釘 56 ， 57 ，在細(xì)長(zhǎng)孔 54 ， 55 及偏心環(huán)板 40 。圖 4 A 顯示的位置設(shè)置關(guān)鍵 30 ，環(huán)形圓盤(pán)板 40 和緊固螺釘 56 ， 57 ，為安裝位置與調(diào)整側(cè)板 50，以最大限度地向上圖 4B 的螺絲釘56 ， 57 ，設(shè)置關(guān)鍵的 30 和環(huán)形光碟片 40 為最低的安裝位置。非對(duì)稱設(shè)置的30 ，其中包括金屬帶一個(gè) L 型剖面，并有廣闊的臂 31 和短肩 32 ，是擰上基座的一個(gè)關(guān)鍵，在 52 的底板 51 利用內(nèi)部的六角螺絲 33 銑出 34。大臂 31 的設(shè)置主要從事設(shè)置關(guān)鍵銑出 34 ，在調(diào)整側(cè)板 50 與其接觸，雖然短肩膀延伸，從內(nèi)側(cè)到 31 并接觸，在設(shè)置鍵槽 22 和法蘭 17（圖一）中的位置來(lái)看圖 4 和肩32 定位于同樣以螺絲 56 ， 57 向下，在細(xì)長(zhǎng)孔 54 ， 55 ，使該調(diào)整側(cè)板50，向上的肩膀 32 設(shè)置鍵槽 22 在法蘭安裝區(qū) 17 （圖一） 。反向安裝位置與肩 32 旋轉(zhuǎn)向上，是表現(xiàn)出相應(yīng)的圖 4B 自聯(lián)軸器經(jīng)過(guò) 16 ，是不是提出在法蘭安裝區(qū) 17，但保持恒定的高度分離，由輸送帶基座 6 ，而切出 60 ，在法蘭盤(pán)50，是相對(duì)提出這個(gè)開(kāi)放的過(guò)渡之間產(chǎn)生截了 60，并率先通過(guò) 16 。在安裝的位置顯示圖 4 a 和圖 4B 偏心環(huán)形圓盤(pán)板 40 一個(gè)更大的機(jī)框方內(nèi)圈 41 和較小的驅(qū)動(dòng)器側(cè)外環(huán) 42 以填補(bǔ)這一開(kāi)放過(guò)渡。外環(huán) 42 關(guān)閉一個(gè)通過(guò)開(kāi)放 43 集中，而較大的內(nèi)圈有一個(gè)通過(guò)開(kāi)放 44 偏心安排其實(shí)際中軸線。在最廣泛的環(huán)帶 48內(nèi)圈 41 ，而在于以下圖。圖 4 A 和上圖 4B，加強(qiáng)鏜 45，安排在每一個(gè)連入其中緊固螺釘 46 與他們的鉆孔都擰成相應(yīng)的挖孔調(diào)整側(cè)板 50 。在安裝條件，為的是證明，例如在圖 2 ，規(guī)模較大的內(nèi)圈 41 ，然后填寫(xiě)聯(lián)軸器經(jīng)過(guò) 16，而外環(huán) 42 在調(diào)整側(cè)板 50 與 60 相接， ，如圖所示，特別是在圖 6 和圖 7 。與階梯式削減了的 60 的外環(huán) 42 可能只是在于正面接觸一臺(tái)機(jī)器框架邊環(huán)形肩。環(huán)形圓盤(pán)板 40 也可以接受，支持的力量在垂直方向，因此，只要緊固螺釘在細(xì)長(zhǎng)孔及設(shè)置位置有 30 來(lái)卸載負(fù)荷就行。跟據(jù)該配置中的裝配單元的傳動(dòng)軸，然后5軸端銷的傳動(dòng)軸通過(guò) 43，44，在環(huán)型光碟片 40 或耦合插座提供耦合到驅(qū)動(dòng)器或一個(gè)齒輪是支持處于靠前位置的 43， 44。驅(qū)動(dòng)器設(shè)置，而不是顯示的那樣，是有可能利用其齒輪箱，法蘭上傳動(dòng)側(cè)外方 53 的調(diào)整側(cè)板 50 。為了達(dá)到這個(gè)目標(biāo)，加強(qiáng)鏜 63， 64， 65， 66， 67（圖 4b ） ，在不同的位置時(shí)，在底板51 使用，其中 4 個(gè)裝配螺絲 68 已旋入。調(diào)整側(cè)板 50 還提供了對(duì)外側(cè) 53 與橫向運(yùn)行設(shè)置鍵槽 69 （圖三） 成為其中一個(gè)設(shè)置 70 （圖 5 ） 。設(shè)置鍵槽 69外側(cè)， 53 板在中央對(duì)面設(shè)置關(guān)鍵銑出 34 在內(nèi)側(cè) 52 ，但延長(zhǎng)至調(diào)整側(cè)板側(cè)邊緣 62 在 73 調(diào)整側(cè)板 50。頭部 73 兩端在一邊，在這里基本上是一個(gè)矩形基座的一部分， 74 銑出 60。在前端該基座的一部分中 ，74 保留 75 鉤，以便能夠向調(diào)整側(cè)板 50 連接。6附件：789101112DRIVE STATION FOR A CHAIN SCRAPER CONVEYOR FOR MINING OPERATIONSThe invention relates to a drive station for a chain scraper conveyor for mining operations, especially for a face conveyor, with a machine frame having a conveyor base, on which can be mounted an exchangeable, drive shaft including an axle and vertical side cheeks, joined torsionally fixed to a chain sprocket and which on at least one of its vertical side cheeks has a flange mounting zone with a lead-through and borings for flange mounting a drive set which can be coupled to the drive shaft.A previously proposed drive station is described in DE 39 23 320 Al. In the previously proposed drive station the flange mounting zone is formed in a flange plate, which is fastened to a tensioning cradle, which can be moved relative to a stationary part of the machine frame by means of tensioning cylinders.According to the individual operational purpose, operational conditions and application site of the face conveyor, conveyor chains with different wire diameters and drive shafts with different chain sprockets, especially chain sprockets with different numbers of teeth are employed. Thus at the state of the technology for instance standardised standard scraper chains with wire diameters of 30 mm, 34 mm, 38 mm or 42 mm are used. In the latest face conveyors chain elements with a diameter of 48 mm are applied with success even in double inboard chain conveyors. For each link diameter a specially matched chain sprocket with at most six or seven teeth is used. At the state of the technology it has previously been customary to provide a special machine frame matched to the necessary dimensions for each wire diameter and each chain sprocket, which works together with a type of conveyor which can be used for all wire diameters and scraper chain types. Since the conveyor plate is basically set at a fixed height level in the types of conveyor, the position of the borings and the lead-through of the coupling in the flange mounting zone varies from one drive station to another drive station, so that a correct transfer of the scrapers from the bottom run of the conveyor into the top run of the conveyor and vice versa is obtained for the individual wire diameter and the number of teeth of the chain sprocket.The present invention has recognised the necessity of different drive stations for different wire diameters as a disadvantage and has the aim of avoiding this disadvantage in a simple and cost-effective manner.Accordingly the present invention is directed to a drive station as set out in the opening paragraph of the present specification, in which adaptor plates are provided for the mounting of the axle of the drive shaft with an adjustable height seperation 13between the conveyor base and the drive shaft axis, which can be fastened on their machine frame side inner sides in various height positions on the flange mounting zone and on whose drive side outer side the drive set can be fastened.The invention has basically recognised that with a constant height level of the conveyor base the central axis of the drive shaft differs only by a few centimeters for different chain sprockets. Thus for instance in the face conveyor drive station Type SPR 5 of the applicant the position of the chain sprocket drive shaft changes by only 40 mm between the lowest assembly position (e.g. with scraper chain/chain sprocket 34x126/7 teeth) and the highest assembly position (with scraper chain/chain sprocket 30x108/7 teeth). By the application of the adaptor plates according to the invention this maximum height difference can be bridged immediately.The difference in height position affects here only the position of the drive shaft axis and the drive shaft relative to the conveyor base. The relative position between the drive shaft ends of the drive shaft and the drive set, which is coupled to the drive shaft remains always the same according to the invention.Especially with a relatively large offset of the assembly position the fastening of the adaptor plates could be made into borings, which are arranged at different heights in the flange mounting zone. It is however preferably provided that the exchangeable drive shaft be an assembly unit and the adaptor plates have elongate holes perpendicular to the conveyor base, which can be engaged through by fastening screws to fasten the adaptor plates using the borings in the flange mounting zone. The advantage of the elongated holes comprises on the one hand that the adaptor plates can be fastened in any intermediate position between the lowest assembly position and the highest assembly position, above all however that adaptor plates according to the invention can be applied in any of the already available drive stations, without changes or rework having to be undertaken in their flange mounting zones. Advantageously the length of the elongate holes determines the maximum height adjustment range.The adaptor plate according to the invention can, possibly together with the annular disc plate, be used with different configurations of drive shaft. Possibly the lead-throughs in the rings of the annular disc plate could also be used to support or mount the drive shaft end pin, especially in the assembly of the drive shaft. A configuration is especially preferred in which the bearings for the drive shaft are arranged in essentially rectangular or square bearing housings, which can be pushed in between an upper brace and a lower brace into a window-like bearing box formed in the machine frame, whereby the bearing housings have an assembly height, which is less than the free height in the bearing box. It is especially preferred here if the bearing housing is closed on three sides and is open on the rearmost, facing away from the 14conveyor side. The drive shaft can then be pushed in through the open end of the machine frame as an assembly unit into the bearing housing. The differing assembly position is possibly adjusted by the interposition of distance fillets. For the extreme assembly positions the distance fillets have the same thickness as the maximum adjustment path, for middle assembly positions two distance fillets each with a thickness corresponding to half the height adjustment path are used. The distance fillets work at the same time also as a sealing between the individual parts in the machine frame. The distance fillets can be formed as separate fillets or in one piece with closing parts, with which the bearing boxes can be locked into the open machine frame ends. Further, centering pins can be formed on the closing parts, which engage in centering holes in the bearing housings. The configuration previously named makes it possible that the assembly unit comprises the drive shaft and also the closing elements and the distance pieces. By means of the centering pins and centering holes tilting or rotation of the bearing housing can additionally be prevented.It is especially preferred if the drive station—as is known—is configured as a tensioning frame, whereby the tensioning frame part having the flange mounting zone for fastening the adaptor plate and formed for the mounting of the drive shaft, is movable relative to the machine frame base, preferably by means of hydraulic cylinders. It is further preferred in this configuration that the machine frame part is provided with a drag plate, which is movable relative to the conveyor base, which overlaps the conveyor base up to a tongue-like cut-out on the side connecting to the conveyor pans. With the drag plate it can be prevented that open abutment positions arise in the top run with movement of the tensioning frame part.An example of a drive station for a chain scraper conveyor according to the present invention, will now be described herein below in relation to the accompanying drawings in which:FIG. 1 shows a perspective view of a drive station with an adaptor plate attached to a rearward flange mounting zone according to the present invention;FIG. 2 shows a plan view of the drive station with adaptor plates on both flange mounting zones;FIG. 3 shows a side view of the drive station shown in FIG. 2;FIG. 4A shows a perspective view of the adaptor plate according to the present invention with the positions of the setting key, annular disc plate and fastening screws for the maximum upper assembly position;FIG. 4B shows a perspective view of the adaptor plate according to the present invention with setting key, annular disc plate and fastening screws for the maximum lower assembly position of the adaptor plate;15FIG. 5 shows a sectional side view of a section of the adaptor plate in the region of the setting keys;FIG. 6 shows a vertical section centrally through the coupling lead-through and the annular disc plate;FIG. 7 shows a horizontal section through the adaptor plate shown in FIG. 4A; andFIGS. 8A-C shows a schematic side view of a drive station with drive shafts in different assembly positions.In FIG. 1 a drive and tensioning station is referenced 10 overall, which is applied at the head end of a chain scraper conveyor, not shown further, which finds application as a face conveyor in an underground extraction operation and for instance forms the so-called auxiliary drive of the face conveyor. The principles of construction of the chain scraper conveyor, not shown, are known and it is formed from conveyor pans put together in sections, which have side profiles in which the scrapers of the scraper chain, not shown, are guided. The drive station formed as a tensioning station 10 has a two part machine frame 1 with a machine frame base 2 in its rear section and a tensioning frame part 3 in its forward section. The machine frame base 2 has fixed vertical side cheeks 4, on whose outer sides two hydraulic cylinders 5 for pushing the tensioning frame part 3 are attached by joints. Between the side cheeks 4 of the machine base 2 a conveyor plate 6 is arranged in a fixed position to whose two sides the side or channel profiles 7 are fixed guiding the scrapers, not shown, and which separates the top run from the bottom run.In the tensioning frame part 3 of the machine frame 1 a drive shaft 9 is mounted, which has two chain sprockets 8 for a double scraper chain. The drive shaft 9 complete with the torsionally fixed chain sprockets 8 joined to it can be assembled or disassembled as an assembly unit through the open head end 11 to the front in FIG. 1 of the machine frame. In the embodiment shown the mounting of the drive shaft 9 is effected by means of two bearings set in square bearing housings 12, whereby the bearing housings themselves are pushed into a window-like bearing box bordered by a lower brace 13 and an upper brace 14 in the free height.The right-hand shaft pin 15 of the drive shaft 9 in FIG. 1 lies free and does not extend into the coupling guide 16, which is formed in the outer side cheek plate 18 forming one flange mounting zone 17. The left-hand shaft pin end in FIG. 1 is joined torsionally fixed to a coupling socket 19, which extends through the coupling lead-through 16 in the left-hand side cheek plate 18 and extends the drive shaft 9 until it reaches into the adaptor plate 50. The construction of the adaptor plate 50 will be further explained in detail below. Between the upper and lower braces 13, 14 and the side cheek plate 18 provided with the flange mounting zone 17 intermediate, essentially U-shaped pieces 21 are arranged, which produce sufficient space for the 16assembly of the drive shaft 9 as an assembly unit with the shaft end pins 15 free. FIG. 1 shows further that the flange mounting zones 17 on the outer side of the side cheek plates 18 each has several, here six, borings 20, the stepped coupling lead-through 16 as well as a setting key groove 22 set out parallel to the conveyor base 6, which extends up to the rear edge of the flange mounting zone 17. Between the conveyor base 6 and the drive shaft 9 is fastened an exchangeable tongue 23 with a chain deflector which is moved together with the tensioning frame part 3 and a drag base 24 in the tensioning of the scraper chain, not shown). The running in situation for the scrapers and the scraper chain on the sprocket 8 is therefore always the same independently of the tensioning position of the tensioning frame part 3 relative to the machine frame base 2.The construction and function of the adaptor plate 50 according to the invention is explained in greater detail below with reference to the further Figures. FIG. 2 and FIG. 3 show the adaptor plate 50 in the assembled condition on the drive station 10. The drive shaft with the chain sprocket, would be assembled on the drive shaft axis A, is not shown. The adaptor plate 50 has a massive, some 7 cm thick baseplate 51, which has a machine frame side inner side 52 and a drive side outer side 53. The base plate 51 has here, corresponding to the number of borings 20 in the flange mounting zone 17, altogether six vertically aligned stepped elongated holes, of which four elongated holes 54 are arranged on one side of a circular cut-out 60 and two elongated holes 55 are arranged on the other side of the cut-out 60. The elongated holes 54, 55 are gripped through by fastening screws 56 and 57, which can suitably be screwed into the borings 20 in the flange mounting zone or can be held by nuts 58 in them. The elongated holes 54 and 55 are each close to the upper and lower lateral edges of the adaptor plate 50 so that an even tightening of the adaptor plate 50 with high retention force is facilitated around the cut-out 60 and the coupling lead-through 16. As FIG. 2 shows, the heads 61 of the screws 56 make a positive engagement in a slot 25 in the inner side of the side cheek plate 18, whilst the nuts 58 come into abutment with the side cheek plate 18 and are drawn onto it. The representation of the upper adaptor plate 50 in FIG. 2 corresponds to the enlarged representation in FIG. 7.The details of the adaptor plate according to the invention are best seen from FIG. 4A and FIG. 4B. The difference between FIG. 4A and FIG. 4B comprises the position of the setting key 30, the relative positions of the fastening screws 56, 57 in the elongated holes 54, 55 and the setting of the eccentric ring plate 40. FIG. 4A shows the position of the setting key 30, annular disc plate 40 and fastening screws 56, 57 for an installation position with the adaptor plate 50 displaced to the maximum upwards, FIG. 4B the position of the screws 56, 57, setting key 30 and annular disc 17plate 40 for the lowest installation position. The asymmetrical setting key 30, which comprises a metal strip with an L-profile and has a broad arm 31 and a short shoulder 32, is screwed onto the base of a setting key cut-out 34 in the inner side 52 of the base plate 51 using internal hexagonal headed screws 33. The broad arm 31 of the setting key engages in the setting key cut-out 34 in the adaptor plate 50 with a positive engagement, whilst the short shoulder extends out from the inner side of the broad arm 31 and makes a positive engagement in a setting key groove 22 in the flange mount- ing zone 17 (FIG. 1) In the position according to FIG. 4Athe shoulder 32 is positioned similarly to the screws 56, 57 downwards in the elongated holes 54, 55, so that the adaptor plate 50, is moved relatively far upwards when the shoulder 32 engages in the setting key groove 22 in the flange mounting zone 17 (FIG. 1). The reverse installation position with the shoulder 32 rotated upwards is shown correspondingly in FIG. 4B. Since the coupling lead-through 16 is not moved in the flange mounting zone 17, but maintains a c