200911452 九、發明說明： 【發明所屬之技術領域】 特別關於一種雙齒軌 本發明關於一種直線運動裝置 的直線運動裝置。 【先前技術】 為使各種工作機台能夠正常地運作’其中的傳動裝置 扮演重要的角色。而於現今技術中，直線運較置則經常 被運用作為各種工作機台的傳動裝置。 請參照第1圖所*，-種習知的直線運動裝置ι〇〇包 含-第-塊體11〇、一第二塊體120、一滾柱保持器13〇 以及一齒輪140。其中，第一塊體11〇及第二塊體12〇上 分別設置-齒條15Q及⑽。滾柱保持器m則具有複數 個滾柱131，而齒輪14〇則固定於滾柱保持器13〇上，並 與齒條150及16〇對應接觸。 因此，第一塊體110及第二塊體12〇即可藉由齒條 150、16〇與齒輪14〇來產生相對運動，且藉由滾柱保持器 130中的滾柱131可減少第一塊體11〇及第二塊體咖相 對運動時所產生的摩擦力。 然而，直線運動裝置100藉由設置於兩塊體11〇、120 中央部位的齒條15〇、⑽與齒輪14G作配合，而由於齒 條150 160為單排的直線結構，因此也會使得兩塊體110、 120彼此相對移動時，受力全部集中於直線結構的齒條 150、160上。因而造成兩塊體11〇、12〇相對運動的表面 200911452 上受力不平均，並進而造成兩塊體110、120易產生偏移 的情形，影響可靠度及使用壽命。 另外，由於滾柱保持器130中的滾柱131與齒輪140 皆位於同一水平線上，因此為使齒輪140與齒條150、160 之間的運動以及兩塊體110、120與滾柱131之間的運動 不會彼此衝突，齒條150、160必須位於第一塊體110及 第二塊體120的溝槽11底部，並使齒輪140較滾柱131 為突出，以使兩不同的運動位於不同平面上進行。然而， 如此也使得齒條150、160的設置與加工不易，並進而造 成直線運動裝置100整體製作成本的提高。 因此，如何提供一種易於加工、低成本且受力平均的 直線運動裝置，以確保產品可靠度及使用壽命，已成為重 要課題之一。 【發明内容】 有鑑於上述課題，本發明之目的為提供一種低成本、 易於加工且受力平均，以確保產品可靠度及使用壽命的直 線運動裝置。 緣是，為達上述目的，依據本發明之一種直線運動裝 置包含一第一塊體、至少二第一齒軌、一第二塊體、至少 二第二齒軌、一滾柱保持單元以及至少一傳動單元。該等 第一齒軌設置於第一塊體。第二塊體鄰設於第一塊體。該 等第二齒轨設置於該第二塊體，並分別與該等第一齒執對 應設置。滾柱保持單元設置於第一塊體及第二塊體之間。 7 200911452 =動二Ten設於滾域持單元並與該等第—齒軌及該等 二軌接觸。其中’第一塊體藉由該等第一齒軌、傳動 早兀及5亥等第二齒執與第二塊體相對移動。 鍊2上所述，依據本發明之—種直線運練置於第-塊 I、第二塊體作相對運動的表面兩側上分別設置二第一 f軌由而第二塊體上亦對應設置二第二齒軌，並藉由傳動 的二齒輪與該㈣—錄及料第二錄接觸，以 :塊體與第二塊體彼此可產生相對移動。藉此，由於 =第-㈣及該㈣m別設置於兩塊體相對運 動之表面的兩側上’使得傳動單元、第—齒軌及第二齒執 的運動卩及兩塊體與滾柱保持單元之滚柱之間的運 ，位於同-垂直線不同水平線上，因此第—齒執及第二齒 2直接設置於兩塊體相對運動的表面上，使得齒執的設 "加工更為容易’且直線運動裝置的整體製作成本能夠 因而降低。另外’將第一齒軌及第二齒軌設置於兩塊體相 對運動之表面的兩側，亦能夠使兩塊體運 平均：以減少兩塊體產生偏移的情形，確保產品可靠; 使用焉^命。 【實施方式】 以下將參照相關圖式，說明依據本發明之一種直線運 動裝置’其中相同元件以相同標號表示。 請參照第2圖所示，本發明較佳實施例之一種直線運 動裝置200包含一第-塊體210'至少二第一齒執22〇、 200911452 一第二塊體230、至少二第二齒執240、一滾柱保持單元 250以及至少一傳動單元260。 該等第一齒軌220設置於第一塊體210上，其中第一 齒軌220除可藉由膠合、鎖合或散入等方式與第一塊體Μ。 連結外，亦可藉由一體成型的方式直接形成於第一塊體 210。於本實施例中，第一塊體210更具有一第一溝槽211 及二擋塊212，第一溝槽211實質呈一 乂形，而該等擋塊 212則設置於第一塊體21〇的兩侧。 第二塊體230鄰設於第一塊體210。該等第二齒軌24〇 设置於第二塊體230上，且分別與該等第一齒執22〇對應 設置。其中，第二齒執24〇與第二塊體23〇之間的連結了 亦同樣可藉由膠合、鎖合或嵌人等方式，亦可藉由一^成 型的方式。於本實施例中，第二塊體23〇更具有一第二溝 槽221及二擋塊222，第二溝槽221實質呈一 乂形，:該 等擋塊222則設置於第二塊體23〇的兩側。 滾柱保持單元250設置於第一塊體21〇與第二塊體 230之間，其具有複數個開孔251及複數個滾柱Μ】，各 滾柱252 &設固定於各開孔251巾，且滾柱252分別與第 塊體210之第一溝槽211及第二塊體23〇之第二溝槽22ι 對應接觸。另外，滾柱保持單元25〇於開孔251周邊更具 有至v P且擔部253,阻擔部253例如為-揚片$ 一播塊。 於本實施例中，於開孔251周邊具有二阻擋部253， 且阻私部253以-擋片為例作說明，然非用以限制本發 明。忒等阻擋部253分別設置於開孔251的上側及下側， 9 200911452 用以固定滾柱252於滾柱保持單元250中的位置。此外， 為固定傳動單元260的位置，滾柱保持單元250更可具有 一固定部254及二凹部255，該等凹部255分別位於固定 部2 5 4的兩侧。 傳動單元260則固設於滾柱保持單元250上，並與第 一齒軌220及第二齒執240接觸。於本實施例中，傳動單 元260具有二齒輪261及一轉軸262，該等齒輪261分別 設置於轉軸262的兩端，而轉轴262固定於固定部254， 各齒輪261則對應設置於各凹部255。其中，固定部254 的寬度小於各齒輪261的直徑，藉此可避免傳動單元260 的位置產生偏移。另外，各齒輪261的齒距分別對應於該 等第一齒軌220及該等第二齒軌240的齒距，而該等齒輪 261並分別與該等第一齒軌220及該等第二齒軌240對應 接觸。 請參照第3圖所示，滾柱保持單元可具有不同的變化 態樣。滾柱保持單元250'可具有一第一保持元件256及一 第二保持元件257，該等保持元件256、257可藉由卡合、 膠合或扣合等方式彼此接合。其中，開孔25Γ分別對應設 置於第一保持元件256及第二保持元件257上；而阻擋部 253'亦分別設置於第一保持元件256及第二保持元件257 上，以使滾柱252產生固定。 於本變化態樣中，滾柱保持單元250'不具有二凹部。 因此，傳動單元260夾置於第一保持元件256及第二保持 元件257之間後，二齒輪261會凸設於滚柱保持單元250’ 10 200911452 的外側。需注意者，本變化態樣非限制性，依據實際需求， 滾柱保持單元250’亦可設置有凹部。 第4圖為本發明之直線運動裝置200的組合示意圖， 第5圖為第4圖之直線運動裝置200沿A-A線的剖面圖。 請同時參照第4圖及第5圖所示，當第一塊體210與第二 塊體230相對移動時，傳動單元260的該等齒輪261會沿 著該等第一齒執220及該等第二齒軌240移動，而滾柱保 持單元250的滾柱252則可減少第一塊體210與第二塊體 230之間運動所產生的摩擦力。 由於第一齒軌220及第二齒軌240分別設置於兩塊體 210、230相對運動之表面的兩侧上，使得傳動單元260、 該等第一齒軌220及該等第二齒軌240之間的運動，以及 兩塊體210、230與滾柱保持單元250的滾柱252之間的 運動位於同一垂直線F不同水平線L1〜L3上。因此，第 一齒軌220及第二齒軌240可直接設置於兩塊體210、230 相對運動的表面上，使得齒軌220、240的設置與加工更 為容易，且直線運動裝置200的整體製作成本能夠因而降 低。另外，將第一齒軌220及第二齒軌240設置於兩塊體 210、230相對運動之表面的兩侧，亦能夠使兩塊體210、 230運動時的受力更為平均，以減少兩塊體210、230產生 偏移的情形，確保產品可靠度及使用壽命。 請參照第6圖所示，傳動單元可具有不同的變化態 樣。傳動單元260’的齒輪26Γ亦可為傘狀齒輪，而第一齒 執220'及第二齒軌240’則對應設置於斜面上，藉此可使第 11 200911452 一齒軌220’及第二齒軌24(^的設置與加工更為容易，也使 得整體製作成本能夠因而降低。 綜上所述，依據本發明之一種直線運動裝置於第一塊 體與第二塊體作相對運動的表面兩側上分別設置二第一 齒軌，而第二塊體上亦對應設置二第二齒執，並藉由傳動 單元上的二齒輪與該等第一齒軌及該等第二齒執接觸，以 使第一塊體與第二塊體彼此可產生相對移動。藉此，由於 該等第一齒執及該等第二齒執分別設置於兩塊體相對運 動之表面的兩侧上，使得傳動單元、第一齒軌及第二齒軌 之間的運動，以及兩塊體與滾柱保持單元之滚柱之間的運 動位於同一垂直線不同水平線上，因此第一齒軌及第二齒 執可直接設置於兩塊體相對運動的表面上，使得齒執的設 置與加工更為容易，且直線運動裝置的整體製作成本能夠 因而降低。另外，將第一齒軌及第二齒執設置於兩塊體相 對運動之表面的兩侧，亦能夠使兩塊體運動時的受力更為 平均，以減少兩塊體產生偏移的情形，確保產品可靠度及 使用壽命。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 第1圖為一種習知直線運動裝置的示意圖； 第2圖為本發明較佳實施例之一種直線運動裝置的分 12 200911452 解圖； 第3圖為本發明直線運動裂置之滾杈保持單元I_ γ 同變化態樣的示意圖； 第4圖為本發明之直線運動裝置的組合示意圖； 第5圖為第4圖之直線運動裝置沿Α-Α線的剖面圖； 以及 第6圖為本發明直線運動裝置之傳動單元具有不同變 化態樣的示意圖。 【主要元件符號說明】 100、 200 :直線運動裝置 110、 210 :第一塊體 120、 230 :第二塊體 130 ： 滾柱保持器 131、 252 :滾柱 140、 261 、26 Ρ :齒輪 150、 160 •齒條 211 ： 第一 溝槽 212、 222 :擋塊 220、 220' :第一齒執 231 ： 第二 -溝槽 240、 240' :第二齒執 250、 250' .滾柱保持單元 251、 251' :開孔 13 200911452 253、253':阻擋部 254 :固定部 255 :凹部 256 :第一保持元件 257 :第二保持元件 260、260':傳動單元 262 :轉軸 F :垂直線 L1〜L3 :水平線200911452 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a linear motion device of a linear motion device. [Prior Art] In order for the various working machines to function properly, the transmissions therein play an important role. In today's technology, linear transport is often used as a transmission for various work machines. Referring to Fig. 1, a conventional linear motion device ι includes a -block 11 〇, a second block 120, a roller holder 13 〇, and a gear 140. The racks 15Q and (10) are respectively disposed on the first block 11〇 and the second block 12〇. The roller holder m has a plurality of rollers 131, and the gear 14 is fixed to the roller holder 13A and is in contact with the racks 150 and 16A. Therefore, the first block 110 and the second block 12 can be relatively moved by the racks 150, 16 〇 and the gear 14 ,, and can be reduced by the rollers 131 in the roller holder 130. The friction generated by the block body 11 and the second body coffee during relative movement. However, the linear motion device 100 is coupled to the gear 14G by the racks 15A, (10) disposed at the central portion of the two bodies 11〇, 120, and since the rack 150 160 is a single-row linear structure, it also causes two When the blocks 110, 120 move relative to each other, the forces are concentrated on the racks 150, 160 of the linear structure. Therefore, the surface of the two bodies 11〇, 12〇 relative movement is unevenly affected on the surface of 200911452, and the two bodies 110 and 120 are easily displaced, which affects reliability and service life. In addition, since the roller 131 and the gear 140 in the roller holder 130 are all on the same horizontal line, the movement between the gear 140 and the rack 150, 160 and between the two bodies 110, 120 and the roller 131 are The movements do not conflict with each other, and the racks 150, 160 must be located at the bottom of the grooves 11 of the first block 110 and the second block 120, and the gears 140 are protruded from the rollers 131 so that the two different movements are different. On the plane. However, this also makes the arrangement and processing of the racks 150, 160 difficult, and further increases the overall manufacturing cost of the linear motion device 100. Therefore, how to provide a linear motion device that is easy to process, low-cost, and force-averaged to ensure product reliability and service life has become one of the important topics. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a linear motion device which is low in cost, easy to process, and subjected to force average to ensure product reliability and service life. In order to achieve the above object, a linear motion device according to the present invention comprises a first block, at least two first racks, a second block, at least two second racks, a roller holding unit and at least A transmission unit. The first racks are disposed on the first block. The second block is adjacent to the first block. The second racks are disposed on the second block and are respectively disposed corresponding to the first teeth. The roller holding unit is disposed between the first block and the second block. 7 200911452 = The second two Ten is set in the rolling zone holding unit and is in contact with the first toothed rail and the two rails. Wherein the first block is relatively moved with the second block by the second tooth, the first gear, and the second tooth. According to the chain 2, according to the present invention, a linear motion is placed on both sides of the surface of the first block and the second block for relative motion, and two first f-tracks are respectively disposed on the second block. Two second racks are disposed, and the second gears of the transmission are in contact with the (four)-recording material second recording, so that the block and the second block can move relative to each other. Thereby, since the =-(four) and the (four)m are disposed on both sides of the surface of the relative movement of the two bodies, the movement of the transmission unit, the first-toothed rail and the second tooth, and the two bodies and the roller are maintained. The movement between the rollers of the unit is located on different horizontal lines of the same-vertical line, so the first tooth holder and the second tooth 2 are directly disposed on the surface of the relative movement of the two bodies, so that the tooth setting is more processed. It is easy and the overall manufacturing cost of the linear motion device can be reduced. In addition, the first rack and the second rack are disposed on both sides of the surface of the relative movement of the two bodies, which can also average the two bodies: to reduce the offset of the two bodies and ensure reliable products;焉^命. [Embodiment] Hereinafter, a linear motion device according to the present invention will be described with reference to the related drawings, wherein the same elements are denoted by the same reference numerals. Referring to FIG. 2, a linear motion device 200 according to a preferred embodiment of the present invention includes a first block 210', at least two first teeth 22〇, 200911452, a second block 230, and at least two second teeth. The brake 240, a roller holding unit 250 and at least one transmission unit 260 are implemented. The first racks 220 are disposed on the first block 210, wherein the first racks 220 are separated from the first block by gluing, locking or scattering. In addition to the connection, it may be directly formed on the first block 210 by integral molding. In the embodiment, the first block 210 further has a first groove 211 and a second block 212. The first groove 211 is substantially in the shape of a dome, and the blocks 212 are disposed on the first block 21. The sides of the cockroach. The second block 230 is adjacent to the first block 210. The second racks 24'' are disposed on the second block 230, and are respectively disposed corresponding to the first teeth 22'. The connection between the second tooth holder 24〇 and the second block body 23〇 can also be achieved by gluing, locking or embedding, or by a molding method. In this embodiment, the second block 23 has a second groove 221 and a second block 222. The second groove 221 has a substantially circular shape. The blocks 222 are disposed on the second block. 23 〇 on both sides. The roller holding unit 250 is disposed between the first block body 21〇 and the second block body 230, and has a plurality of openings 251 and a plurality of rollers ,, and each of the rollers 252 & is fixed to each of the openings 251. The towel and the roller 252 are respectively in contact with the first groove 211 of the first block 210 and the second groove 22 of the second block 23〇. Further, the roller holding unit 25 has a portion to the periphery of the opening 251 and has a portion VP, and the blocking portion 253 is, for example, a paddle. In the present embodiment, there are two blocking portions 253 around the opening 251, and the blocking portion 253 is described by taking a baffle as an example, but is not intended to limit the present invention. The blocking portions 253 are respectively disposed on the upper side and the lower side of the opening 251, and 9 200911452 is used to fix the position of the roller 252 in the roller holding unit 250. In addition, in order to fix the position of the transmission unit 260, the roller holding unit 250 further has a fixing portion 254 and two recesses 255, which are respectively located at two sides of the fixing portion 254. The transmission unit 260 is fixed to the roller holding unit 250 and is in contact with the first rack 220 and the second tooth holder 240. In the embodiment, the transmission unit 260 has two gears 261 and a rotating shaft 262. The gears 261 are respectively disposed at two ends of the rotating shaft 262, and the rotating shaft 262 is fixed to the fixing portion 254, and the gears 261 are correspondingly disposed in the concave portions. 255. The width of the fixing portion 254 is smaller than the diameter of each of the gears 261, whereby the position of the transmission unit 260 can be prevented from shifting. In addition, the pitches of the gears 261 correspond to the pitches of the first racks 220 and the second racks 240, respectively, and the gears 261 are respectively associated with the first racks 220 and the second The rack 240 corresponds to the contact. Referring to Figure 3, the roller holding unit can have different variations. The roller retaining unit 250' can have a first retaining member 256 and a second retaining member 257 that can be engaged with one another by snapping, gluing or snapping. The openings 25 对应 are respectively disposed on the first holding member 256 and the second holding member 257 ; and the blocking portions 253 ′ are respectively disposed on the first holding member 256 and the second holding member 257 to generate the roller 252 . fixed. In this variation, the roller holding unit 250' does not have two recesses. Therefore, after the transmission unit 260 is interposed between the first holding member 256 and the second holding member 257, the two gears 261 are protruded outside the roller holding unit 250' 10 200911452. It should be noted that the present variation is not limited, and the roller holding unit 250' may be provided with a recess according to actual needs. 4 is a combined schematic view of the linear motion device 200 of the present invention, and FIG. 5 is a cross-sectional view of the linear motion device 200 of FIG. 4 taken along line A-A. Referring to FIG. 4 and FIG. 5 simultaneously, when the first block 210 and the second block 230 are relatively moved, the gears 261 of the transmission unit 260 are along the first teeth 220 and the same The second rack 240 moves, and the rollers 252 of the roller holding unit 250 reduce the friction generated by the movement between the first block 210 and the second block 230. Since the first rack 220 and the second rack 240 are respectively disposed on two sides of the surface of the two bodies 210, 230 relative to each other, the transmission unit 260, the first rack 220 and the second rack 240 are disposed. The movement between the two bodies 210, 230 and the rollers 252 of the roller holding unit 250 is located on the different horizontal lines L1 to L3 of the same vertical line F. Therefore, the first rack 220 and the second rack 240 can be directly disposed on the surfaces of the two bodies 210, 230 that move relative to each other, so that the arrangement and processing of the racks 220, 240 are easier, and the whole of the linear motion device 200 Production costs can be reduced accordingly. In addition, the first rack 220 and the second rack 240 are disposed on both sides of the surface of the two bodies 210 and 230 which are relatively moved, and the force of the two bodies 210 and 230 during the movement can be more evenly reduced to reduce The two bodies 210, 230 are offset to ensure product reliability and service life. Referring to Figure 6, the drive unit can have different variations. The gear 26 of the transmission unit 260' may also be an umbrella gear, and the first tooth holder 220' and the second tooth rail 240' are correspondingly disposed on the inclined surface, thereby making the 11th 200911452 a rack 220' and the second The arrangement and processing of the rack 24 is easier, and the overall manufacturing cost can be reduced. In summary, the surface of the linear motion device according to the present invention is relatively movable on the first block and the second block. Two first racks are respectively disposed on the two sides, and two second teeth are correspondingly disposed on the second block, and the two gears on the transmission unit are in contact with the first racks and the second teeth. So that the first block and the second block can be moved relative to each other. Thereby, since the first teeth and the second teeth are respectively disposed on two sides of the surface of the relative movement of the two bodies, The movement between the transmission unit, the first rack and the second rack, and the movement between the two bodies and the rollers of the roller holding unit are on different horizontal lines of the same vertical line, so the first rack and the second The tooth holder can be directly placed on the surface of the two bodies relative to the movement The setting and processing of the tooth holder are made easier, and the overall manufacturing cost of the linear motion device can be reduced. In addition, the first rack and the second tooth can be disposed on both sides of the surface of the relative movement of the two bodies. The force of the two bodies is more evenly moved to reduce the offset of the two bodies, ensuring product reliability and service life. The above is only an example, not a limitation. The spirit and scope of the present invention, and equivalent modifications or alterations thereof, are included in the scope of the appended claims. [FIG. 1 is a schematic diagram of a conventional linear motion device; 2 is a top view of a linear motion device according to a preferred embodiment of the present invention; 200911452; FIG. 3 is a schematic view showing the same state of the roll holding unit I_γ of the linear motion splitting of the present invention; FIG. 5 is a sectional view of the linear motion device of FIG. 4 along the Α-Α line; and FIG. 6 is a different embodiment of the linear motion device of the present invention. Schematic diagram of the same. [Main component symbol description] 100, 200: Linear motion device 110, 210: First block 120, 230: Second block 130: Roller holder 131, 252: Roller 140, 261 26 Ρ : gear 150, 160 • rack 211 : first groove 212 , 222 : stop 220 , 220 ′ : first tooth holder 231 : second groove 140 , 240 ′ : second tooth 250 250'. Roller holding unit 251, 251': opening 13 200911452 253, 253': blocking portion 254: fixing portion 255: recess 256: first holding member 257: second holding member 260, 260': transmission unit 262 : Rotary axis F: vertical line L1 ~ L3 : horizontal line