201131102 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種照明燈，尤其是一種可取代現有的傳統路 燈的發光二極體路燈。 【先前技術】 目前市面上的路燈多為傳統的水銀燈泡，裝配在路燈燈座 上以進行工作，眾所周知，傳統的水銀燈泡使用壽命較短，一般 φ 只有3000小時，極易損壞，更換頻繁，而且耗電量大，已漸漸 無法滿足目前社會提倡的節能減碳的綠色要求。目前發光二極體 的發展給傳統的路燈照明指出了 一條合理的發展道路，既採用發 光二極體路燈來代替傳統的路燈照明燈具，然而，傳統的路燈已 發展了較長時間，目前業已標準化、規格化了，例如安裝路燈的 燈座，目前普遍採用的型號為E40金屬接頭座，如果要採用發光 二極體路燈來代替傳統水銀燈，最合理的方案即為發光二極體路 燈能夠直接接入目前的普通燈座内工作，然而，目前的發光二極 Φ 體路燈並不具有傳統燈泡的特定型號接頭（如E40金屬接頭）， 所以無法實現傳統水銀燈泡的直接替換；而且，現有的發光二極 體路燈，多位元體積較小的結構以減輕燈整體重量及體積，使得 内部結構空間較為狹窄，在狹窄的空間内，散熱能力會隨之有所 損失，因此如何使發光二極體路燈具有更為良好的散熱效果，也 一直是人們研究的重點。 【發明内容】 本發明的目的之一，在於提供一種具有標準化金屬接頭的 發光二極體燈泡，可以直接安置于傳統路燈座上； 3 201131102 本發明的另一目的在於提供一種具有良好散熱效果的發光 二極體路燈； 本發明的另一目的在於提供一種角度調整環，以連接有局 限投射角度的發光二極體路燈，以使發光二極體路燈能夠在任意 角度固定。 本發明為解決其技術問題所採用的技術方案是： 一種發光二極體路燈，包括： • 一標準化金屬接頭；一電氣連接金屬接頭的發光二極體模 組，具有一電路板，至少一發光二極體電氣連接該電路板；以及 一散熱裝置；其中所述散熱裝置包括至少一熱管，具有相連的平 整段及非平整段，其中所述平整段的正面安置所述發光二極體； -散熱後罩，與所《管的非平整段連接；以及—位於熱管與散 熱後罩之間的活塞傳動裝置，通過發光二極體路燈工作時產生的 熱量而運動；-位於發光二極體路燈前方外部的排熱扇與所述 φ 活塞傳動裝置傳動連接。 作為上述方案的進-步改進，其中所述電路板位於熱管的 平整段背面；所述活塞軸裝置包括—設置於魏板背面的活塞 缸；-設置於活塞缸_活塞；—連接活塞的活塞杆；其中排熱 扇與活塞杆傳動連接。 作為上述方案的進一步改進，其中所述電路板上設有通 孔’所述活塞傳動裝置還包括-位於通孔處的對流扇，與所述活 塞杆傳動連接。 201131102 作為上述方案的進一步改進，所述發光二極體模組後部套 設有一角度調整環與所述標準化金屬接頭連接，該角度調整環上 螺紋設有作用部朝内側發光二極體模组的鬆緊釘，以當發光二極 體路燈沿角度調整環旋轉至適當角度時予以固定。 一種角度調整環，在其環體上螺紋設置有鬆緊釘，所述鬆緊 釘旋動頭部朝外，而頂壓尾部朝内。 本發明的有益效果是：本發明提供了一種具有標準化金屬接 鲁 頭的發光二極體路燈，金屬接頭為型號如E40以及其他類似的旋 轉接頭，可如普通路燈一樣直接與傳統燈座配對安裝，可在傳統 燈泡，如水銀燈損耗時被拔除之後取而代之，因此使得目前廣泛 使用的路燈座不需要花費額外的成本改裝，節省了大量的資金與 勞動成本，並且採用發光二極體路燈，不但使用壽命大大延長， 而且更為符合目前社會節能減碳的綠色要求；本發明所採用的散 熱裝置，結合了熱管、散熱後罩以及通過工作發熱量提供動力進 • 行排熱的活塞傳動裝置、排熱肩及對流扇，結構巧妙，不消耗額 外能源，可在發光二極體路燈較小的結構空間内得到有優異的散 熱效果，有效保證了路燈的長時間工作能力及使用壽命；另外的 角度調整裝置’可使得只具有局隨射肖度的發光二極體路燈能 夠根據所需的照射方位調整角度，得到最好的照射效果。 本發明所屬技術領域中具有通常知識者，在閱讀此說明書之 後，將可理解本發明其他目的及優點。 2〇113li〇2 【實施方式】 如圖1〜圖4所示，本發明所提供的一種發光二極體路燈，包括： 一標準化金屬接頭1，為與路燈燈座相配合的通用型號，例如E4〇 接頭等旋轉接頭，外部設有螺紋，可以旋入路燈燈座中固定；201131102 VI. Description of the Invention: [Technical Field] The present invention relates to an illumination lamp, and more particularly to a light-emitting diode street lamp which can replace the existing conventional street lamp. [Prior Art] At present, most of the street lamps on the market are traditional mercury bulbs, which are assembled on the lamp holders for work. It is well known that the traditional mercury bulbs have a short service life, generally only 3,000 hours, which is extremely fragile and frequently replaced. Moreover, the power consumption is large, and it is gradually unable to meet the green requirements of energy conservation and carbon reduction advocated by the society. At present, the development of light-emitting diodes points out a reasonable development path for traditional street lighting. It uses LED street lamps instead of traditional street lighting. However, traditional street lamps have been developed for a long time and are now standardized. Normalized, for example, the lamp holder for installing street lamps. The model currently used is the E40 metal connector. If a light-emitting diode street lamp is to be used instead of the traditional mercury lamp, the most reasonable solution is to directly connect the LED street lamp. Working in the current ordinary lamp holder, however, the current illuminating two-pole Φ body lamp does not have the specific type of connector of the traditional bulb (such as E40 metal connector), so the direct replacement of the traditional mercury bulb cannot be realized; The diode street lamp has a multi-bit structure with a small volume to reduce the overall weight and volume of the lamp, so that the internal structure space is relatively narrow, and the heat dissipation capability is lost in a narrow space, so how to make the light-emitting diode Street lamps have a better heat dissipation effect and have always been the focus of research. SUMMARY OF THE INVENTION One object of the present invention is to provide a light-emitting diode bulb having a standardized metal joint, which can be directly disposed on a conventional lamp holder; 3 201131102 Another object of the present invention is to provide a heat dissipation effect. Light-emitting diode street light; Another object of the present invention is to provide an angle adjusting ring for connecting a light-emitting diode street lamp with a limited projection angle so that the light-emitting diode street light can be fixed at an arbitrary angle. The technical solution adopted by the present invention to solve the technical problem thereof is as follows: A light-emitting diode street lamp comprising: • a standardized metal joint; a light-emitting diode module electrically connected to the metal joint, having a circuit board, at least one light-emitting The diode is electrically connected to the circuit board; and a heat dissipating device; wherein the heat dissipating device comprises at least one heat pipe having a connected flat section and a non-flat section, wherein the front side of the flat section is disposed with the light emitting diode; a heat-dissipating rear cover that is connected to the non-flat section of the tube; and a piston transmission between the heat pipe and the heat-dissipating rear cover, which is moved by the heat generated when the LED street lamp operates; - a light-emitting diode street light A heat exhaust fan on the front outside is drivingly connected to the φ piston drive. As a further improvement of the above solution, wherein the circuit board is located at the back of the flat section of the heat pipe; the piston shaft device comprises: a piston cylinder disposed on the back of the Wei plate; - a piston cylinder _ piston; - a piston connecting the piston a rod; wherein the exhaust fan is connected to the piston rod. As a further improvement of the above aspect, wherein the circuit board is provided with a through hole, the piston transmission further comprises a convection fan at the through hole, which is drivingly coupled to the piston rod. As a further improvement of the above solution, the rear cover of the LED module is provided with an angle adjusting ring connected to the standardized metal joint, and the thread on the angle adjusting ring is provided with an active portion facing the inner LED module. The elastic pin is fixed when the light-emitting diode street lamp is rotated to an appropriate angle along the angle adjustment ring. An angle adjusting ring is provided with a peg on its ring body, the pegs screwing the head outward and the top pressing tail facing inward. The invention has the beneficial effects that the invention provides a light-emitting diode street lamp with a standardized metal joint, the metal joint is a model such as E40 and the like, and can be directly installed with a conventional lamp holder as a common street lamp. It can be replaced after the traditional bulbs, such as mercury lamps, are removed, so that the currently widely used lamp holders do not require additional cost modification, saving a lot of capital and labor costs, and using LED street lamps, not only use The service life is greatly extended, and it is more in line with the current green energy saving and carbon reduction requirements; the heat dissipating device used in the present invention combines a heat pipe, a heat dissipation rear cover, and a piston transmission device that provides power for heat removal through work heat generation. The hot shoulder and convection fan are cleverly structured and do not consume extra energy. They can obtain excellent heat dissipation in the small space of the LED street light, which effectively ensures the long-term working ability and service life of the street lamp. The adjusting device can make the light-emitting two with only the local incidence The polar street light can adjust the angle according to the desired illumination direction for the best illumination. Other objects and advantages of the present invention will be understood from the description of the appended claims. 2〇113li〇2 [Embodiment] As shown in FIG. 1 to FIG. 4, a light-emitting diode street lamp provided by the present invention comprises: a standardized metal joint 1 which is a general-purpose model matched with a lamp lamp holder, for example Rotary joints such as E4 〇 joints, externally threaded, can be screwed into the lamp holder to fix;
一發光二極體模組2，與金屬接頭丨電氣連接，進而在金屬接頭i 捿入路燈燈座時獲得電能工作，該發光二極體模組2具有一電路板 2〇1 ’用於設置各種電子元器件’至少一發光二極體2〇2電氣連接該 電路板201，從而能夠正常工作；以及一散熱裝置3，在發光二極體 模組2工作時進行散熱； 共中，如圖3所示的實施例一，散熱裝置3包括：至少一熱管 1以獲得較佳的熱交換效果，該熱管301具有相連的平整段及非 平整段’纟中的平整段的正面安置所述發光二極體2〇2，使得結構合 理，在發光二極體202工作產生的熱量通過熱管3〇1的平整段向非 平整段傳遞； 散熱後罩302,優選為散熱續片或者銘金屬散熱片，能夠與空 I車乂大面積的接觸’熱傳遞效率也較快，與所述熱管則的非平整 匕連接’使得傳遞熱管3〇1非平整段的熱量再傳遞到散熱後罩⑽ 上’通過散熱後罩3〇2的片狀結構散發出去；以及 置，通過發 ’從而成為 光 —位於熱管301與散熱後罩搬之間的活塞傳動裝 二極體路敎作時產生的熱量，峨得活塞結構運動 個微小的動力源； 與所述活塞傳動 位於發光二極體路燈前方外部的排熱扇 201131102 裝置傳動連接，通過活塞傳動裝置得到動力，以將發光二極體路燈 内部的熱空氣排出。 而且作為優選的實施方式，其中的電路板2〇1位於熱管3〇丨的 平整段背面，且所述活塞傳動裝置包括一設置於電路板201背面的 活塞缸304、一設置於活塞缸304内的活塞305、一連接活塞3〇5的 活塞杆306，其令所述排熱扇3〇3與所述活塞杆3〇5傳動連接成為 一個完整的動力連動機構，位於電路板2〇1背面與散熱後罩3〇2之 φ 間的空間内。 本發明所採用的標準化金屬接頭丨，使得發光二極體路燈可如普 通路燈一樣直接與傳統燈座配對安裝，可在傳統燈泡，如水銀燈損 耗時被拔除之後取而代之，因此使得目前廣泛使用的路燈座不需要 花費額外的成本改裝，節省了大量的資金與勞動成本，並且採用發 光二極體路燈’不但使用壽命大大延長，而且更為符合目前社會節 能減碳的綠色要求。 # 此外請參照圖4的第二種實施例，所述電路板201上優選設有 通孔2011，使得位於電路板201正面的發光二極體202工作所產生 的較熱空氣可以通過通孔2011傳遞到電路板201背面的空間，而為 了加速這部分空氣的流動，所述活塞傳動裝置還包括一位於通孔 2011處的對流扇307，與所述活塞杆306傳動連接’對流扇307的 轉動便可以加速電路板201正、背面兩側處的空氣流動。 在上述的實施例二及實施例三的結構中，活塞傳動裝置是通過 熱空氣工作的，其中活塞缸304後側設有導熱部304〇 ’例如為功率 201131102 電晶體或其他散熱不易元件，具有靈敏的熱傳導性，能夠將熱量高 效地傳遞到活塞紅304内，且活塞虹3〇4内部由活S3〇5分隔為後 部熱室3041及前部冷室3042，使熱室3〇41與導熱部3〇4〇相連發 光二極體路燈工作時產生的熱量被導熱部3〇4〇吸收，傳遞到熱室 3041，因熱脹冷縮的原理，熱室3041受熱膨脹，推動活塞3〇5向前 運動擠壓冷室3042，以向前活塞杆3〇6。 而且，活塞缸304為朝向發光二極體路燈前方的縱向設置，所 述活塞杆306前部通過一連杆3〇8與橫向設置的第一錐齒輪3〇91傳 動連接，第一錐齒輪3091與縱向設置的第二錐齒輪3〇92相契合傳 動，可以把活塞杆306向前方的運動，經過第一錐齒輪3〇91傳遞到 第二錐齒輪3092，改變第二錐齒輪3092以前、後方的縱向為中輛的 轉動； 其中的排熱扇303後側設有排熱扇轉軸3031，排熱扇轉軸3〇31 伸入發光二極體路燈内部與所述第二錐齒輪3092相連接，第二雏歲 輪3092的轉動便傳遞為排熱扇303的轉動；而排熱扇303轉動時， 會將發光二極體路燈外部的冷空氣吹進發光二極體路燈内部，冷空 氣接觸導熱部3040，溫度傳遞給熱室3041，使熱室3041冷卻而髮 縮，活塞305因而向後方熱室3041運動，傳遞到活塞杆306，依次 通過連杆308傳動到第一錐齒輪3091、第二錐齒輪3092 ;如此周而 復始，成為一個不需額外能量源的動力迴圈。 在基於上述結構下，第三種實施例中的對流扇307設有對淹屬 轉轴3071與所述第二錐齒輪3092相連接，以獲取轉動動力。 201131102 此外，作為本發明的優選實施方式，所述排熱扇303為螺旋葉 狀，與風扇的扇葉類似’得以較好的換氣棑熱效果。 本發明上述的散熱結構十分巧妙，不消耗額外能源’可在發光 二極體路燈較小的結構空間内得到優異的散熱效果，有效保證了路 燈的長時間工作能力及使用壽命。 本發明還藉此結構提供了一種可調整照射角度的結構，為發光 二極體模組2後部套的一角度調整環4，可位於發光二極體模組2尾 φ 部與金屬接頭1相接的絕緣環5處，與所述標準化金屬接頭i連接， 該角度調整環4上螺紋設有作用部朝内側發光二極體模組2的鬆緊 釘41，以當發光二極體路燈沿角度調整環4旋轉至適當角度時予以 固定，可使得只具有局限投射角度的發光二極體路燈能夠根據所需 的照射方位調整角度，得到最好的照射效果。 本發明如圖1所示的一種角度調整環4,在其環體上螺紋設置有 fc緊釘41，所述鬆緊釘41的旋動頭部朝外，而頂壓尾部朝内，可通 • 過旋轉旋動頭部，控制鬆緊釘41的頂壓尾部處於環體内方向的位 置，以得到不同内徑尺寸，能順利固定内部所頂壓的物件；配合于 本發明的發光二極體路燈使用，藉此得到可調整照射角度的結構。 當然，上述是本發明參照較佳實施例而進行的說明示範，惟應瞭 解的是在不脫離本發明之精神及範脅内，對於本發明所屬技賴域 中具有通常知識者而言’仍得有許多變化及修改。因此，本發明並 不限制於所揭露的實施例，而是以後附申請專利範圍之文字記載為 准，即不偏離本發明申請專利範圍所為之均等變化與修錦，應仍屬 201131102 本發明之涵蓋範圍。 【圖式簡單說明】 下面結合附圖和具體實施例對本發明作進一步說明： 圖1為本發明的結構示意圖； 圖2為本發明的内部結構示意圖； 圖3為本發明第一種實施例後側的内部結構示意圖； 圖4為本發明第二種實施例後側的内部結構示意圖 【主要元件符號說明】 1 金屬接頭 2 發光二極體模組 3 散熱裝置 4 角度調整環 5 絕緣環 41 鬆緊釘 201 電路板 202 發光二極體 301 熱管 302 散熱後罩 303 排熱扇 304 活塞缸 305 活塞 306 活塞杆 307 對流扇 308 連杆 2011 通孔 3031 排熱扇轉軸 3040 導熱部 3071 對流扇轉軸 3041 後部熱室 3042 前部冷室 3091 第一錐齒輪 3092 第二錐齒輪An LED module 2 is electrically connected to the metal connector , to obtain electrical energy when the metal connector i is inserted into the lamp socket. The LED module 2 has a circuit board 2〇1 'for setting Various electronic components 'at least one light-emitting diode 2〇2 is electrically connected to the circuit board 201 so as to be able to work normally; and a heat sink 3 is used for heat dissipation during operation of the light-emitting diode module 2; In the first embodiment shown in FIG. 3, the heat dissipating device 3 comprises: at least one heat pipe 1 having a heat exchange effect, and the heat pipe 301 has a flat portion and a flat portion of the non-flat section The diode 2〇2 makes the structure reasonable, and the heat generated by the working of the light-emitting diode 202 is transmitted to the non-flat section through the flat section of the heat pipe 3〇1; the heat-dissipating cover 302 is preferably a heat-dissipating film or a metal heat sink The contact with the large area of the empty I rudder 'the heat transfer efficiency is also faster, and the non-flat splicing connection with the heat pipe' causes the heat of the non-flat section of the heat transfer pipe 3〇1 to be transferred to the heat-dissipating rear cover (10). Through the heat dissipation cover The sheet structure of 3〇2 is dissipated; and the heat generated by the piston-driven diode circuit between the heat pipe 301 and the heat-dissipating cover is transmitted through the hair, and the piston structure movement is obtained. a tiny power source; and the heat-dissipating fan 201131102 of the piston drive outside the front of the LED street lamp is connected to the device, and is powered by the piston transmission device to discharge the hot air inside the LED street lamp. Moreover, as a preferred embodiment, the circuit board 2〇1 is located on the back surface of the flat section of the heat pipe 3〇丨, and the piston transmission device includes a piston cylinder 304 disposed on the back surface of the circuit board 201, and a piston cylinder 304 disposed in the piston cylinder 304. a piston 305, a piston rod 306 connecting the piston 3〇5, which drives the heat-dissipating fan 3〇3 and the piston rod 3〇5 to form a complete power linkage mechanism, which is located on the back of the circuit board 2〇1 In the space between the φ of the heat-dissipating rear cover 3〇2. The standardized metal joint 丨 used in the invention enables the light-emitting diode street lamp to be directly matched with the conventional lamp holder like a normal street lamp, and can be replaced after the conventional light bulb, such as a mercury lamp, is removed, thereby making the street lamp widely used at present. The seat does not require additional cost modification, saves a lot of capital and labor costs, and the use of LED street lights not only greatly prolongs the service life, but also more in line with the current green energy saving and carbon reduction requirements. Referring to the second embodiment of FIG. 4, the circuit board 201 is preferably provided with a through hole 2011, so that the hot air generated by the operation of the LED 202 on the front surface of the circuit board 201 can pass through the through hole 2011. The piston transmission device further includes a convection fan 307 at the through hole 2011 for transmitting the convection fan 307. The air flow at the front and back sides of the circuit board 201 can be accelerated. In the structures of the second embodiment and the third embodiment, the piston transmission device is operated by hot air, wherein the rear side of the piston cylinder 304 is provided with a heat conducting portion 304 〇 'for example, a power 201131102 transistor or other heat dissipating component, Sensitive thermal conductivity, the heat can be efficiently transferred into the piston red 304, and the inside of the piston rainbow 3〇4 is separated by the living S3〇5 into the rear heat chamber 3041 and the front cold chamber 3042, so that the heat chamber 3〇41 and the heat conduction The heat generated by the 3发光4〇 connected light-emitting diode street lamp is absorbed by the heat conducting portion 3〇4〇 and transmitted to the heat chamber 3041. Due to the principle of thermal expansion and contraction, the heat chamber 3041 is thermally expanded to push the piston 3〇5. The forward movement squeezes the cold chamber 3042 to the forward piston rod 3〇6. Moreover, the piston cylinder 304 is disposed longitudinally toward the front of the LED street lamp, and the front portion of the piston rod 306 is drivingly connected to the laterally disposed first bevel gear 3〇91 via a connecting rod 3〇8, the first bevel gear 3091 and The longitudinally disposed second bevel gears 3〇92 are coupled to the transmission, and the forward movement of the piston rod 306 can be transmitted to the second bevel gears 3092 through the first bevel gears 3〇91, and the front and rear of the second bevel gears 3092 can be changed. The longitudinal direction is the rotation of the middle vehicle; the rear side of the exhaust fan 303 is provided with a heat-dissipating fan shaft 3031, and the heat-dissipating fan shaft 3〇31 extends into the interior of the light-emitting diode street lamp and is connected with the second bevel gear 3092. The rotation of the second annual wheel 3092 is transmitted as the rotation of the heat exhaust fan 303; and when the heat exhaust fan 303 is rotated, the cold air outside the light-emitting diode street lamp is blown into the interior of the light-emitting diode street lamp, and the cold air contacts the heat-transfer portion. 3040, the temperature is transferred to the heat chamber 3041, the heat chamber 3041 is cooled and contracted, and the piston 305 is thus moved to the rear heat chamber 3041, and transmitted to the piston rod 306, and sequentially transmitted to the first bevel gear 3091 and the second cone through the connecting rod 308. Gear 3092; so repeated And become a source of energy without additional power loop. Based on the above structure, the convection fan 307 in the third embodiment is provided with a pair of submerged rotating shafts 3071 connected to the second bevel gears 3092 to obtain rotational power. Further, as a preferred embodiment of the present invention, the heat-dissipating fan 303 is in the shape of a spiral leaf, which is similar to the fan blade of the fan, and has a better ventilation and heat-dissipating effect. The above-mentioned heat dissipating structure of the invention is very clever and does not consume extra energy. The excellent heat dissipation effect can be obtained in the small space of the light-emitting diode street lamp, which effectively ensures the long-term working ability and the service life of the street lamp. The present invention also provides a structure for adjusting the illumination angle. The angle adjustment ring 4 of the rear sleeve of the LED module 2 can be located at the end φ of the LED module 2 and the metal connector 1 Connected to the insulating ring 5, and connected to the standardized metal joint i, the thread on the angle adjusting ring 4 is provided with a locking nail 41 of the working portion facing the inner light emitting diode module 2, so as to be along the angle of the light emitting diode street lamp When the adjusting ring 4 is rotated to an appropriate angle, it is fixed, so that the LED street lamp having only the limited projection angle can adjust the angle according to the required irradiation direction, and the best illumination effect can be obtained. An angle adjusting ring 4 as shown in FIG. 1 is provided with an arc pin 41 threaded on a ring body thereof. The rotating head 41 has a rotating head facing outward, and the pressing tail is facing inward. Rotating the head over and rotating, controlling the position of the top end of the elastic nail 41 in the direction of the ring body to obtain different inner diameter sizes, and capable of smoothly fixing the object pressed inside; the LED street lamp matched with the present invention Use, thereby obtaining a structure that can adjust the irradiation angle. Rather, the foregoing is a description of the preferred embodiments of the present invention, and it is understood that in the spirit and scope of the present invention, There are many changes and modifications. Therefore, the present invention is not limited to the disclosed embodiments, but is intended to be in accordance with the scope of the appended claims. Coverage. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be further described with reference to the accompanying drawings and specific embodiments. FIG. 1 is a schematic view of the structure of the present invention; FIG. 2 is a schematic diagram of the internal structure of the present invention; 4 is a schematic view of the internal structure of the rear side of the second embodiment of the present invention. [Main component symbol description] 1 Metal connector 2 Light-emitting diode module 3 Heat sink 4 Angle adjustment ring 5 Insulation ring 41 Elastic Nail 201 circuit board 202 light-emitting diode 301 heat pipe 302 heat-dissipating rear cover 303 exhaust fan 304 piston cylinder 305 piston 306 piston rod 307 convection fan 308 connecting rod 2011 through hole 3031 exhaust fan shaft 3040 heat transfer portion 3071 convection fan shaft 3041 rear Hot chamber 3042 front cold chamber 3091 first bevel gear 3092 second bevel gear