M248930 捌、新型說明： 【新型所屬之技術領域】 本創作主要是在一具有塑 用~模的方式再加上一層金屬 簡單來降低製作成本，而且又 轴承的整體負載亦可大為增加 膠喊體之旋轉元件的外部利 Λ又體’藉此而可因為加工的 因為金屬殼體的加入，所以 【先前技術】 請參看第三圖所示，目前一4 鉦系，Η丄 般市面上最常見到的一種 軸承即疋由一旋轉元件（6 ) 忐·甘士 ^ ^ μ , 乂及一金屬殼體（7)所組 成，其中，該金屬殼體（7) θα丨m 处入备 」疋利用加工的方式而緊密地 m a在旋轉元件（6 )的外部， 门時，在金屬外殼（7) 的外部表面處則界定著有一截 料曲為U形的凹槽（71)， 藉此’ 一繩索（未顯示）則可. n 〗7在6亥凹槽（71)内帶動該 金屬外殼（7)來相對旋轉元件（6)作旋轉。 由於這類的轴承於組裝時，需要複雜且繁項的加 程來將該金屬外殼（7)組裝在旋轉元件（6)的外部， 所以無形中’其在組裝的成本上將大幅的上揚；故而，為 了降低其製作成本，改良其製程是再所難免的。 請參看第四圖所示，其中，可見及另-種軸承結構， 其主要是由-旋轉元件（8)以及一在其外部具有u形截 面凹槽（9 1 )之塑膠殼體（9 )所組成。該塑膠殼體（ 9)是以射出成形的方式而緊密地結合在該旋轉元件（8 )的外部，故而在組裝時可以省卻許多繁瑣的步驟，而也 M248930 因此’其在製程的成本上也可因此而大幅的降低；然而， 眾所週知的’塑膠由於其材質的特殊性質，其在負載重量 的能力上將大大的不如金屬的製品，也就是說當此種具有 塑勝殼體（9 )的軸承於使用時，僅能負載較輕的重量， 過重的負載將可能會導致整個殼體的破裂，而這一個因素 則又限制了此類軸承的發展。 【新型内容】 為此解決上述的問題，本創作主要目的是提供一種加 工簡單，且具有尚負載能力的軸承結構，其主要是在塑膠 殼體的外部再加上一層金屬殼體，如此則可形成一加工簡 單且具有高負載能力的轴承結構。 【實施方式】 請參看第一圖所示，其中，可見及本創作之軸承結構 是具有一旋轉元件（i)、一塑膠殼體（3)以及一金屬 殼體（4 )。 该旋轉元件（1)是具有一大徑部（1 1 )以及一小 徑部（12);該小徑部（i2)是穩固地，且可旋轉的 方式而容置在大徑部（1 1 )的内部。 該塑膠殼體（3)是以射出成型的方式而包覆在大徑 部（1 1 )的外側，使得塑膠殼體可以相對於該小徑部= 產生相對旋轉運動，且在該塑膠殼體（3 )的外部表面處 則是具有一U形的凹槽（3 1)。 該金屬殼體（4)是為一中空的環狀體，其外部表面 M248930 i對應到凹槽（3 1 )的第二 處是形成有一截面為ϋ形 四槽（4 1 )。 二圖所示’其中可見到該塑膠殼體（3)因 ϋ::型方式而固定在旋轉元件⑴㈣部，所 裝疋轉元件⑴和塑膠殼體（3)時，並不需要 額外的加工程序，故在製 在裊的成本上可以因此而免去不 必=化費。其後’則再是利用鑄模的自動化程序來將該 金屬设體（4 )固設在塑膠殼體（3 )的外部，並且將凹 槽（3 1 )以及第二凹槽（4丄）相互疊♦，至此而完成 本創作軸承的組裝。 在本創作的組裝完成後，當可見到，由於其中各部件 之組裝均是由自動化程序來完成，所以在製造的成本上可 以大幅的減去不必要的開銷’因而成本可以維持在相當低 的範圍内。 再者，由於金屬殼體（4)是包覆在塑膠殼體（3) 的外部，所以在使用時，繩索是安置在第二凹槽（4工） 的内部，而直接的和第二⑽（41)的内部表面間產生 摩擦。由於金屬的抗摩擦性較之於塑膠來的高出許多，再 加上金屬具有較之塑膠為高的負載能力，所以在金屬殼體 (4 )設置在塑膠殼體（3 )的外部後，則可增加軸承的 整體負載能力。 【圖式簡單說明】 (一）圖式部分 第一圖：為本創作轴承之元件分解立體圖； M248930 第二圖：為本創作轴承之元件於組合後的平面剖視圖 第三圖：為習用軸承的立體外觀圖；以及 第四圖：為習用軸承的立體外觀圖。 (二）元件代表符號 (1 )旋轉元件 (11)大徑部 (1 2 )小徑部 (3 )塑膠殼體 (31)凹槽 (4 )金屬殼體 (41)第二凹槽 (6 )旋轉元件 (7 )金屬外殼 (7 1 )凹槽 (8 )旋轉元件 (9 )塑膠殼體M248930 新型, new type description: [Technical field of new type] This creation is mainly in a way with plastic ~ mold plus a layer of metal to reduce production costs, and the overall load of the bearing can also greatly increase the plastic The external advantage of the rotating element of the body can also be used because of the processing because the metal shell is added, so [prior art] Please refer to the third figure. Currently, the 4th series is the most popular on the market. A common type of bearing is 疋 consisting of a rotating element (6) 忐 · ganshi ^ ^ μ, 乂 and a metal shell (7), where the metal shell (7) θα 丨 m is prepared "疋 Using the processing method, the outer part of the rotating element (6) is tightly closed. At the door, a U-shaped groove (71) is defined on the outer surface of the metal casing (7). 'A rope (not shown) is allowed. N 〖7 drives the metal shell (7) in the groove 6 (71) to rotate relative to the rotating element (6). Since this type of bearing needs to be assembled in a complicated and costly process to assemble the metal housing (7) on the outside of the rotating element (6), it will virtually increase its cost of assembly; Therefore, in order to reduce its production cost, it is inevitable to improve its manufacturing process. Please refer to the fourth figure, in which there is visible and another bearing structure, which is mainly composed of a rotating element (8) and a plastic housing (9) with a U-shaped groove (9 1) on the outside. Composed of. The plastic casing (9) is tightly coupled to the outside of the rotating element (8) by injection molding, so many tedious steps can be omitted during assembly, and M248930 therefore 'its cost in the process Can be greatly reduced; however, the well-known 'plastic' due to the special properties of its material, its ability to load weight will be greatly inferior to metal products, that is, when this kind of plastic has a shell (9) When the bearing is in use, it can only bear a light weight. Excessive load may cause the entire housing to rupture, and this factor limits the development of such bearings. [New content] In order to solve the above problems, the main purpose of this creation is to provide a bearing structure that is simple to process and has a load capacity. It mainly consists of a plastic shell and a metal shell on the outside. A bearing structure with simple processing and high load capacity is formed. [Embodiment] Please refer to the first figure, in which it can be seen that the bearing structure has a rotating element (i), a plastic casing (3) and a metal casing (4). The rotating element (1) has a large-diameter portion (1 1) and a small-diameter portion (12); the small-diameter portion (i2) is stably and rotatably accommodated in the large-diameter portion (1) 1) Inside. The plastic shell (3) is coated on the outside of the large-diameter part (1 1) by injection molding, so that the plastic shell can generate relative rotational movement relative to the small-diameter part, and the plastic shell (3) The outer surface is provided with a U-shaped groove (31). The metal casing (4) is a hollow ring-shaped body, and the outer surface M248930 i corresponding to the groove (3 1) is formed with a cross-section-shaped four groove (4 1). As shown in the second figure, it can be seen that the plastic casing (3) is fixed to the rotating element ϋ due to the ϋ :: type method. No additional processing is required when the rotating element ⑴ and the plastic casing (3) are installed. Procedures, so the cost of control can be avoided because of this. After that, the metal setting body (4) is fixed on the outside of the plastic casing (3) by using the automatic procedure of the mold, and the groove (3 1) and the second groove (4 丄) are mutually Fold ♦ to complete the assembly of this creative bearing. After the assembly of this creation is completed, it can be seen that since the assembly of each component is completed by an automated process, the unnecessary cost can be greatly reduced in the manufacturing cost ', and the cost can be maintained at a relatively low level. Within range. In addition, since the metal casing (4) is covered on the outside of the plastic casing (3), when in use, the rope is placed inside the second groove (4 workers), and the direct and second (41) Friction occurs between the inner surfaces. Because the friction resistance of metal is much higher than that of plastic, and metal has a higher load capacity than plastic, after the metal casing (4) is disposed outside the plastic casing (3), It can increase the overall load capacity of the bearing. [Schematic description] (1) The first part of the schematic part: an exploded perspective view of the components of the creative bearing; M248930 The second image: the plan sectional view of the components of the creative bearing after being assembled. A perspective external view; and a fourth view: a perspective external view of a conventional bearing. (2) Symbols for element representation (1) Rotating element (11) Large diameter part (1 2) Small diameter part (3) Plastic case (31) groove (4) Metal case (41) Second groove (6) ) Rotating element (7) Metal housing (7 1) Groove (8) Rotating element (9) Plastic housing