46 194 1 A7 __ B7 五、發明說明（1 ) 【發明所屬之技術領域】 (請先閱讀背面之注意事項再填寫本頁) 本發明係關於一種車輛用刹車鼓，係具有呈同軸地圍 繞著被固定在車軸上的圓筒狀輪轂的圓筒部；和呈一體地 連設在前述圓筒部的一端之用來連結前.述輪轂及前述圓筒 部的一端之間的連結部之車輛用刹車鼓，其特徵爲關於改 良防止刹車叫聲之剎車鼓。 【先前技術】 以往構成上，係在剎車鼓外圈黏著彈性環，用以防止 刹車叫聲，如日本實開昭6 3 — 1 9 3 1 3. 1號公報所揭 示；又，金屬製環固著於刹車鼓之外圏，用以防止刹車叫 聲之構成亦爲一習知技術。 【發明所欲解決之課題】 如上述以往構成，爲固著彈性環或金屬製環，不僅使 零件數目增加，也必須有組裝環的過程，因而成爲成本增 加的主要原因。 經濟部智慧財產局員工消費合作社印製 本發明之目的，係有鑑於上述情況，提供一種能減少 零件數目及組裝工時，並可獲得防止剎車叫聲效果之車輛 用刹車鼓。 【用以解決課題之手段】 爲達上述目的，本發明申請專利範圍第1項所記載， 係關於一種車輛用刹車鼓，係具有呈同軸地圍繞著被固定 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -4 - 461941 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明（2 ) 在車軸上的圓筒狀輪轂的圓筒部；和呈一體地連設在前述 圓筒部的一端之用來連結前述輪轂及前述圓筒部的一端之 間的連結部之車輛用刹車鼓，其特徵爲：在前述圓筒部係 一體地形成有環狀的厚壁部。 根據此構成，形成圓筒部之厚壁部提高圓筒部之韌性 ，並抑制圓筒部之震動，進而防止刹車叫聲。且厚壁部在 刹車鼓成形時即與圓筒部形成一體，因此和以往須將個別 零件之環固著在圓筒部外圍的構成比較起來，不但減少零 件數量，且因不需組裝環的過程，也減少組裝工時。 又申請專利範圍第2項之記載，其特徵係在上述申請 專利範圍第1項之發明構成上，上述輪轂與上述連結部被 形成一體，上述構成和須將輪轂熔接於刹車鼓的連結部相 比，不須在圓筒部內側與輪轂熔接後再加工，進而減低加 工工時。亦即連結部與輪轂熔接時所產生的熱可能使圓筒 部及輪轂產生歪斜，而爲修正此一歪斜而必要再加工，但 因輪轂及連結部被形成一體，不僅可以防止上述歪斜的發 生，並可減少加工工時。 【發明之實施型態】 以下，佐以圖面所揭示之一實施例說明本發明之實施 型態。 第1圖及第2圖係顯示本發明之一實施例。第1圖爲 具備刹車鼓之車輪縱剖面圖’第2圖爲刹車鼓之鑄造成形 過程順序圖。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -5- J丨—丨丨—丨！ I —丨丨訂- - - --- (請先閱讀背面之注意事項再填寫本頁) 461941 A7 — B7 五、發明說明（3 ) 首先在第1圖中’.已…養1裝輪胎1之輪圈2上，與輪幅 3之外圍熔接，該3 .^內面，根據本發明，與刹車 鼓4之外圍熔接。 (請先閱讀背面之注意事項再填寫本頁) 刹車鼓4具有被固定在車軸9之圓筒狀輪轂5 ，和呈 同軸地圍繞該輪轂5之圓筒部6 ，和連結輪轂5及圓筒部 δ —端之連結部7，使圚筒部6與環狀厚壁部6 c形成一 體。 上述剎車鼓4 ’係經第2圖所揭示之過程鍛造形成， 在鍛造形成時，首先如第2 a圖所揭示準備胚材1 1準備 ’該胚材1 1之素材可使用鋁合金或鈦合金等輕金屬、含 碳鋼、不绣鋼及銅合金等合適材料，又胚材1 1的形狀最 好爲環圈狀。 上述胚材1 1依第2 b〜g圖所揭示的過程順序施以 鍛造加工，首先將上述胚材1 1扭轉，如第2 b圖所揭示 般，可獲得成鐘型斷面之第1次成形體1 2。 經濟部智慧財產局員工消費合作社印製 將第1次成形體1 2施以中心上突加工，可獲得如第 2 c圖所揭示的具有半完成輪轂部1 3及半完成杯部1 4 之第2次成形體1 5 ，再將第2次成形體1 5施以邊緣扳 直加工。依此可獲得如第2 d圖所揭示的，具有使上述半 完成輪轂部1 3及半完成杯部1 4各呈突出形狀之半完成 輪轂部1 6及半完成杯部1 7之第3次成形體1 8。 在第3次成形體1 8上，將半完成輪轂部1 6的端面 壓平，同時將半完成杯部1 7施以向下深衝加工，依此可 獲得如第2 e圖所揭示的’具有半完成輪轂部1 9及半完 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公芨） 經濟部智慧財產局員工消費合作社印製 A7 B7______ 五、發明說明（4 ) 成杯部2 0之第4次成形體1 2 ，其半完成杯部2 0之開 口端部上形成厚壁部2 0 a。 · 在第4次成形體2 1上，將上述半完成部輪轂部19 施以縮小直徑，同時施以擴孔加工將上述半完成杯部2 0 的內徑向下衝壓，依此可獲得如第2 f圖所揭示的，幾乎 與刹車鼓4對應之半製品4 ’ 。該半製品4 ’係將圓筒狀 之輪轂5 ，與呈同軸地圍繞該輪轂5之圓筒部6 ，和連結 輪轂5及圓筒部6 —端之連結部7被形成一體；圓筒部6 ，係具有連接連結部7外圍一端之小直徑圓筒部6 a ，和 比小直徑圓筒部6 a直徑大之大直徑圓筒部6 b ，並藉比 小直徑圓筒部6 a及大直徑圓筒部6 b厚壁的環狀厚壁部 6 c連接同軸。亦即圚筒部6係一體地形成有環狀的厚壁 部.6 c。 在上述半製品4 ’上之輪轂5內側施以花鍵成形加工 ，依此，可獲得如第2 g圖所揭示的，輪轂5內圍具有使 花鍵結合車軸9 .之花鍵溝1 0之刹車鼓4。 其次說明本實施例之作用，因具備刹車鼓4之圓筒部 6與環狀厚壁部6 c被形成一體，故該厚壁部6 c可提高 圓筒部6之韌性並抑制圓筒部6之震動，並防止刹車叫聲 。且厚壁部6 c在刹車鼓4成形時與圓筒部6被形成一體 ，和以往跟刹車鼓4爲個別零件的環固著在圓筒部6外圍 之構成相比，不僅零件數目減少，亦不需環的組裝過程， 而減低組裝工時。 又刹車鼓4之連結部7與輪轂5被形成一體，與刹車 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ---『------ ---- ^ i I I I--I I--II I I I 4,, J (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明（5 ) 鼓4之連結部7須與輪轂熔接之構成相比，不須在圓筒部 6內面與輪轂熔接後再加工，不但減低加工工時，且被裝 設於輪轂5內面的花鍵溝1 〇也可維持很高的加工精準度 。即爲修正連結部7與輪轂熔接時的熱使圓筒部6所產生 的歪斜所做的加工’可能使輪轂5內面花鍵溝1 0的加工 精準度減低，而輪轂5及連結部7形成一體，即不須加工 修正上述歪斜’此舉可減低加工工時，亦可維持很高的花 鍵溝10的加工精準度。 以上說明本發明之實施例，但本發明並不侷限於上述 實施例，亦可在不脫離本發明申請專利範圍上，進行種種 設計變更。 【發明效果】 根據上述申請專利範圍第1項之記載，厚壁部提高圓 筒部之韌性並抑制圓筒部之震動，亦可防止刹車叫聲，且 厚壁部與刹車鼓在成形時被形成一體，而與以往須將跟刹 車鼓爲不同零件之環固著在圓筒部外圍的構成相比，不僅 減低零件數目’也不需組裝環的過程，進而減少組裝工時 〇 又根據申請專利範圍第2項之記載，可以減低加工工 時。 【圖面之簡單說明】 第1圖係具有刹車鼓之車輪縱剖面圖。 « I, ^--------^---------^ ' W ./---,,/(. f琦先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -8 - 461941 A7 B7 五、發明說明（6 ) 第2圖係刹車鼓之鑄造成形過程順序圖 J 咅明鼓 部壁部 說車轂筒厚結軸 號刹輪圓：連車 |〇|里 : ·. ·. ο ·. *. [ 4 5 6 6 7 9 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 -9- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）46 194 1 A7 __ B7 V. Description of the invention (1) [Technical field to which the invention belongs] (Please read the precautions on the back before filling out this page) The present invention relates to a brake drum for a vehicle, which has a coaxial surround. A cylindrical portion of a cylindrical hub fixed to an axle; and a vehicle that is integrally connected to one end of the cylindrical portion and is used to connect the foregoing. The connecting portion between the hub and one end of the cylindrical portion A brake drum is characterized in that it is an improved brake drum for preventing brake calls. [Prior art] In the conventional structure, an elastic ring is attached to the outer ring of the brake drum to prevent the brake call, as disclosed in Japanese Publication No. 6 3-1 9 3 1 3.1; and a metal ring It is a well-known technique to fix the brake drum outside to prevent the brake call. [Problems to be Solved by the Invention] As described above, in order to fix the elastic ring or the metal ring, not only the number of parts needs to be increased, but also the process of assembling the ring is required, which has become the main cause of the increase in cost. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economics The present invention has been made in view of the foregoing circumstances, and provides a brake drum for a vehicle that can reduce the number of parts and assembly man-hours, and can prevent the effect of braking noise. [Means to solve the problem] In order to achieve the above-mentioned purpose, the item 1 of the patent application scope of the present invention relates to a brake drum for a vehicle, which has a coaxially surrounding fixed paper size and applies Chinese national standards (CNS ) A4 size (210 X 297 mm) -4-461941 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (2) The cylindrical part of the cylindrical hub on the axle; A brake drum for a vehicle connected to a connecting portion between one end of the cylindrical portion and the hub and one end of the cylindrical portion, wherein the cylindrical portion is integrally formed with a ring shape. Thick-walled section. According to this configuration, forming the thick-walled portion of the cylindrical portion improves the toughness of the cylindrical portion, suppresses the vibration of the cylindrical portion, and prevents the brake call. In addition, the thick-walled part is integrated with the cylindrical part when the brake drum is formed. Therefore, compared with the conventional structure in which the ring of individual parts must be fixed to the periphery of the cylindrical part, not only the number of parts is reduced, but The process also reduces assembly man-hours. The description of the second patent application scope is characterized by the invention structure of the first patent application scope, wherein the hub is integrated with the connection portion, and the structure is similar to the connection portion where the hub must be fused to the brake drum. In comparison, it is not necessary to perform welding after welding with the hub inside the cylindrical portion, thereby reducing the processing time. That is, the heat generated when the connecting portion and the hub are welded may cause the cylinder portion and the hub to be skewed, and reprocessing is necessary to correct this skew. However, the hub and the joint portion are integrated to prevent the above-mentioned skew from occurring. And can reduce processing time. [Implementation Mode of the Invention] Hereinafter, an embodiment disclosed in the drawing will be used to describe the implementation mode of the present invention. 1 and 2 show an embodiment of the present invention. Fig. 1 is a longitudinal sectional view of a wheel provided with a brake drum '. Fig. 2 is a sequence diagram of a casting process of the brake drum. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -5- J 丨 — 丨 丨 — 丨! I — 丨 丨 Order------ (Please read the precautions on the back before filling out this page) 461941 A7 — B7 V. Description of the invention (3) First in the first picture, '. Has been installed 1 tire 1 The rim 2 is fused to the periphery of the spoke 3, and the inner surface of the rim 3 is fused to the periphery of the brake drum 4 according to the present invention. (Please read the precautions on the back before filling in this page.) The brake drum 4 has a cylindrical hub 5 fixed to the axle 9 and a cylindrical portion 6 that coaxially surrounds the hub 5 and connects the hub 5 and the cylinder. The portion δ is an end connecting portion 7 that integrates the cylindrical portion 6 and the annular thick-walled portion 6 c. The above brake drum 4 'is formed by forging according to the process disclosed in FIG. 2. When forging is formed, firstly prepare the blank material 1 1 as shown in FIG. 2a. The material of the blank material 1 1 can be aluminum alloy or titanium. Light metals such as alloys, carbon-containing steel, stainless steel, and copper alloys are suitable materials, and the shape of the blank 11 is preferably ring-shaped. The aforementioned blank material 11 is subjected to forging according to the process sequence disclosed in the second b ~ g diagram. First, the aforementioned blank material 11 is twisted. As disclosed in the second b figure, the first of the bell-shaped section can be obtained. Secondary formed body 1 2. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs on the first forming body 12 to be processed with a central protrusion, as shown in Fig. 2c, a semi-finished hub portion 13 and a semi-finished cup portion 1 4 can be obtained. The second formed body 15 is subjected to edge straightening processing. According to this, as shown in FIG. 2D, the third and third semi-finished hub portions 16 and the semi-finished cup portions 17 having the protruding shapes of the semi-finished hub portion 13 and the semi-finished cup portion 14 respectively can be obtained. Secondary formed body 1 8. On the third formed body 18, the end surface of the semi-finished hub portion 16 is flattened, and the semi-finished cup portion 17 is subjected to deep-drawing at the same time, so as to be obtained as shown in FIG. 2e 'With semi-finished wheel hub 19 and semi-finished paper sizes applicable to China National Standard (CNS) A4 specifications (210 X 297 gong) Printed by A7 B7 ______ of the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of invention (4) The fourth formed body 12 of the cup portion 20 has a thick wall portion 20a formed on the open end of the cup portion 20 which is half-finished. · On the fourth formed body 21, the above-mentioned semi-finished hub portion 19 is reduced in diameter, and at the same time, a hole-reaming process is applied to press the semi-finished cup portion 20 in the inner radial direction downward, so as to obtain, for example, As shown in Fig. 2f, the semi-finished product 4 'which almost corresponds to the brake drum 4. The semi-finished product 4 'is formed by integrating a cylindrical hub 5 with a cylindrical portion 6 that coaxially surrounds the hub 5 and a connecting portion 7 connecting the hub 5 and the cylindrical portion 6 at the ends; the cylindrical portion 6, which has a small-diameter cylindrical portion 6a connected to the peripheral end of the connecting portion 7 and a large-diameter cylindrical portion 6b having a larger diameter than the small-diameter cylindrical portion 6a, and borrowed from the small-diameter cylindrical portion 6a and The large-diameter cylindrical portion 6 b and the thick-walled annular thick-walled portion 6 c are coaxially connected. That is, the cymbal tube portion 6 is integrally formed with an annular thick-walled portion .6c. A spline forming process is performed on the inner side of the hub 5 on the above-mentioned semi-product 4 ′, and as a result, as shown in FIG. 2 g, the inner periphery of the hub 5 is provided with a spline groove 10 that connects the spline to the axle 9. Of brake drum 4. Next, the effect of this embodiment will be described. Since the cylindrical portion 6 provided with the brake drum 4 and the annular thick-walled portion 6 c are integrated, the thick-walled portion 6 c can improve the toughness of the cylindrical portion 6 and suppress the cylindrical portion. 6 vibrations and prevent brake calls. In addition, the thick-walled portion 6 c is integrated with the cylindrical portion 6 when the brake drum 4 is formed. Compared with the conventional structure in which the ring is a separate component fixed to the periphery of the cylindrical portion 6 from the brake drum 4, the number of parts is reduced. It also eliminates the need for a ring assembly process and reduces assembly man-hours. The connecting part 7 of the brake drum 4 and the hub 5 are integrated, and the paper size of the brake applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) --- "------ ---- ^ i II I--I I--II III 4 ,, J (Please read the precautions on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Invention Description (5) Drum 4 Compared with the welding structure of the hub, the connecting portion 7 does not need to be processed after welding the inner surface of the cylindrical portion 6 to the hub, which not only reduces the processing time, but also is installed on the spline groove 1 of the inner surface of the hub 5. It also maintains high machining accuracy. That is, the processing performed to correct the distortion caused by the heat generated when the connecting portion 7 and the hub are welded to the cylindrical portion 6 may reduce the machining accuracy of the spline groove 10 on the inner surface of the hub 5, and the hub 5 and the connecting portion 7 Forming one body, that is, no need to process and correct the above-mentioned skewness, can reduce the processing time, and also maintain a high machining accuracy of the spline groove 10. The embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments, and various design changes can be made without departing from the scope of patent application of the present invention. [Effect of the invention] According to the first item of the scope of the aforementioned patent application, the thick-walled portion improves the toughness of the cylindrical portion and suppresses the vibration of the cylindrical portion. Form a whole, and compared with the previous structure in which the ring that is a different component from the brake drum is fixed on the periphery of the cylindrical portion, not only the number of parts is reduced, but the process of assembling the ring is also reduced, thereby reducing the assembly man-hours. The second item in the patent scope can reduce the processing time. [Brief description of the drawing] Figure 1 is a longitudinal sectional view of a wheel having a brake drum. «I, ^ -------- ^ --------- ^ 'W ./---,,,/ (. F Qi first read the notes on the back before filling out this page) This paper The dimensions are applicable to China National Standard (CNS) A4 specifications (210 X 297 mm) -8-461941 A7 B7 V. Description of the invention (6) Figure 2 is a sequence diagram of the casting process of the brake drum. Thickness of the hub and cylinder with a large number of brake wheels: continuous car | 〇 | inside: ·. ·. Ο ·. *. [4 5 6 6 7 9 (Please read the precautions on the back before filling this page) Wisdom of the Ministry of Economic Affairs Printed by the Property Cooperative Consumer Cooperatives -9- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)