201241340 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明係有關於一種傳動機構之背隙消除裝置，尤 其是指一種針對工作台的傳動機構所創新研發之齒隙間 的背隙消除結構，除以堝桿帶動堝輪而具有大扭力的傳 動效果之外，再利用動力驅動活塞的方式，以使其達到 軸向位移蝸桿，消除蝸桿與蜗輪在傳動時的背隙，進而 達到蝸桿與工作台傳動間的背隙消除設計者。 【先前技術】 [0002] 按，一般在機械操作中最常見到的是傳動機構的運 用，而傳動機構的使用範圍為最廣泛，同時所運用的技 術也有諸多方法，舉如日本特開平7 — 148632號 ，其係分別於機台内設有兩平行而設的蝸桿，兩蝸桿分 別對應傳動兩蝸輪，而該兩蜗輪再對應傳動上方之工作 台，然而，上述結構因堝桿為兩平行設置，使其在傳動 時無法相互抵消推力，因此，傳動軸向推力大。 [0003] 另外，該曰本案中所揭露之另一實施例技術，為於 機台内設有内蝸桿，而於内蝎桿外部再對應套接一外蝸 桿，藉由兩同心之内、外蜗桿對應傳動兩蜗輪，而該兩 蜗輪再對應傳動上方之工作台，然而，該内、外蜗桿雖 為同軸心的傳動，但其因為套設組合，機構較複雜，同 時，兩媧桿的製作成本高，且亦需手動調整準確對應組 裝才能與媧輪嚆合傳動；另外，對應套接的内、外蝎桿 並無法具有軸向位移控制的設計〔無法具有調整控制背 隙功能〕，即該内、外蝸桿的組裝在基本上並無具背隙 100113026 表單編號A0101 第4頁/共23頁 1002021713-0 201241340 [0004] Ο [0005]201241340 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a backlash eliminating device for a transmission mechanism, and more particularly to a backlash elimination between the backlashes which is innovatively developed for a transmission mechanism of a table. The structure, in addition to the transmission effect of the large torque provided by the mast driving the wheel, the driving force of the piston is used to make the axial displacement worm, and the backlash of the worm and the worm wheel during transmission is eliminated, thereby achieving the worm The backlash between the table and the table drive eliminates the designer. [Prior Art] [0002] Press, generally the most common in mechanical operation is the use of the transmission mechanism, and the transmission mechanism is the most widely used, and there are many methods used in the technology, such as the Japanese special Kaiping 7 No. 148632, which is provided with two parallel worms in the machine table, the two worms respectively correspond to the two worm gears, and the two worm gears respectively correspond to the work table above the transmission. However, the above structure is arranged in two parallels due to the masts. Therefore, it is impossible to cancel the thrust of each other when the transmission is performed, and therefore, the axial thrust of the transmission is large. [0003] In addition, another embodiment of the technology disclosed in the present invention is that an inner worm is disposed in the machine, and an outer worm is respectively sleeved on the outer side of the inner mast, by means of two concentric inner and outer parts. The worm gears correspond to the two worm gears, and the two worm gears respectively correspond to the work table above the transmission. However, although the inner and outer worms are coaxial transmission, the mechanism is complicated because of the combination of the sleeves, and at the same time, the two masts The production cost is high, and it is also necessary to manually adjust the accurate corresponding assembly to match the transmission of the wheel; in addition, the corresponding inner and outer masts cannot be designed with axial displacement control [cannot have the function of adjusting the control backlash] That is, the assembly of the inner and outer worms has substantially no backlash 100113026. Form No. A0101 Page 4 / Total 23 Page 1002021713-0 201241340 [0004] Ο [0005]
[0006] 100113026 狀態，但若需要調整背隙狀態的話，其需針對内、外蜗 桿之圓周相位的調整，才可將背隙狀態消除，但針對上 述内、外蝸桿之圓周相位調整則需拆卸迫緊塊才可進行 ，因此，在實施操作上具有妨礙加工程序的缺失。 而針對上述缺失，發明人及研發申請有公開號2 0 1 0 3 3 5 Ο 1號一種傳動機構之背隙消除裝置，其主 要係於機台設有可驅動工作台作動的傳動機構，其中係 設有一動力源驅動具左、右牙的煱桿，讓蝸桿分別帶動 兩堝輪，以使蝸輪傳動工作台轉動，同時該蝸桿具有位 移調整傳動蝸輪之背隙者。然而，上述結構因蝸桿通過 兩煱輪間之中心線成一角度之交叉，及作動蝸桿軸向位 移之元件，需置於此蜗桿之後側端，因此，機台上的配 置較佔空間。 緣是，發明人有鑑於此，秉持多年該相關行業之豐 富設計開發及實際製作經驗，針對現有之結構及缺失予 以研究改良，提供一種傳動機構之背隙消除裝置，以期 達到更佳實用價值性之目的者。 【發明内容】 本發明為達上述目的特提供一種傳動機構之背隙消 除裝置，其主要為增加傳動時的扭力、消除推力及改善 空間配置等因素，藉以利用動力驅動活塞的方式，以使 其達到軸向位移蝸桿，消除蝸桿與蜗輪在傳動時的背隙 ，進而達到蝸桿與工作台傳動間的背隙消除設計者。 本發明一種傳動機構的目的與功效係由以下之技術 所實現： 表單編號Α0101 第5頁/共23頁 1002021713-0 [0007] 201241340 [0008] 其主要係於機台設有可驅動工作台作動的傳動機構 ，係設有動力源驅動一體成形有左、右牙段的蝸桿，而 該堝桿與工作台之齒條呈平行向設置，以當該蝸桿分別 帶動兩媧輪轉動，而其一竭輪經由一中間輪來轉向傳動 ，藉此以可帶動工作台平移者；藉此，以蝸桿左、右牙 段傳動蝸輪可相互抵消推力、平均負擔扭力，達到大扭 力的傳達功效者。 [0009] 本發明一種傳動機構之背隙消除裝置的目的與功效 係由以下之技術所實現： [0010] 其主要係於機台設有可驅動工作台作動的傳動機構 ，係設有動力源驅動一體成形有左、右牙段的蝸桿，於 堝桿左、右牙段之間設有背隙消除裝置，該背隙消除裝 置經由一動力單元驅動活塞而產生動力及預壓調整，藉 以推動蝸桿軸向位移消除背隙者；藉此，以背隙消除裝 置達到準確傳動及定位的效果者。 【實施方式】 [0011] 為令本發明所運用之技術内容、發明目的及其達成 之功效有更完整且清楚的揭露，茲於下詳細說明之，並 請一併參閱所揭之圖式及圖號： [0012] 首先，請參閱第--三圖所示，為本發明一種傳動 機構之背隙消除裝置之整體剖視示意圖，其係於工作台 下設有令工作台承載工件而具有平行位移的傳動機構（ 2)，該傳動機構（2)設有動力源（2 1)驅動具有 左、右牙段（222) 、（221)的蝸桿（2 2 )〔 該左、右牙段（2 2 2 )、（ 2 2 1 )係一體成形於蝸 100113026 表單編號 A0101 第 6 頁/共 23 頁 100202Π13-0 201241340 [0013] [0014] Ο [0015] [0016] ❹ [0017] 100113026 表單編號Α0101 桿（2 2)上〕分別帶ι 動兩蜗輪（2 3)、（ 2 4)而 捍（22)上設有背隙消除裝置 (3)，該背隙消除裝置（3)包含有： 連轴器（31)，係對應組設連結動力源（2 1 )出力軸（2 11)料桿（22)且具設有吸收堝捍 (2 2)微量位移的構件； 軸套（3 2)’係對應組設於蜗桿（2 2)蜗捍 左、右牙段（2 2 2 )、（221)之間，且軸套（3 2)上设有管路（321). —動力單元（3 3) ’係對應導設在軸套（32) 之管路（3 2 1 )上；及 活塞（3 4)，係對應設置在軸套（3 2)内部 ^藉轴承（341)包覆蜗桿（22) ’而該活塞（ 3:):對應位於動力單元（33)輸入動力之處，以 受動力單元（3 3 ) 者。 3)___(22)位移及回復 △請—併參閱第-〜八圖所示，於組裝時，係於工作 1方對應設有傳動機構（2)，該傳動機構（2)中 力源(川，而動力源(21)之出力轴（ |端料組設背隙消除裝置（3)之連轴器（3 (31)—端組接具有左、右牙段（2 之左…！21)的蜗桿（22)，該玛桿（22) 第：（2 2 2 )、（221)分別對應與第-、第一蜗輪（23) 、 （24)舊合，使其第—、第二 第7頁/共23頁 1002021713-0 201241340 蝸輪（2 3)之轉向相反’可讓推力互相抵消及 擔扭力，接續’該第_、第二螞輪（23)、（、 之中心軸上分別設有連動的傳動輪（231)、 1) ’而該第-蜗輪（23)之傳動輪（2川 應與一轉向功效的中間輪（2 5 )嚙合傳動 傳輸至第-從動輪（26) ’且經由第—從動輪 )中心轴所設之傳動輪（261)與齒條（28)鳴人 ，而第二蜗輪（24)之傳動輪（241)則對應" -從動輪（2 7)喃合傳輸動力，且經由第二從動輪（ 27)中心軸所設之之傳動輪（271)與呈固定狀雜 的齒條（28)鳴合，如此，第-、第二從動輪（2: )、（27)之傳動輪（261)、（271)於齒條 (28)上呈同向轉動來帶動卫作台平行位移者。 [0018] [0019] 接續’再於蜗桿（22)左、右牙段（M2)、 (2 2 1 )之間設有軸套（3 2)，而軸套（3 2)上 之管路（321)對應導接動力單元（33)，該動力 單元（3 3)係可以油壓或氣壓方式為之，即為空壓缸 或油壓缸U可利用可程式控制動力單⑽動者〕，再 於轴套（32)内組裝活塞（34)，讓活塞（34) ，轴承（341)包覆蜗桿（22)，且對應位於動力 單元（3 3)輸入動力之處。 當操作時，其當動力源（2 1)驅動堝桿（22) 帶動第-、第二蝎輪（23)、（24)而令工作台作 動’於高速的傳動下，其蜗桿（22)與第_、第二蜗 輪（2 3 )、（ 2 4)的傳動會形成具有慣性會傳遞轉 100113026 表單編號A0101 苐8頁/共23頁 1002021713-0 201241340 動’而使其蝸桿（2 2)與第一、第二蝸輪（2 3)、 (2 4)之間產生齒與齒間的背隙空間（X)，而背隙 空間（X)的存在係減少齒與齒間產生的磨耗及碰撞， 但於停止或低速預壓時’需將該背隙空間（X )消除以 讓齒與齒間定位準確傳動，因此，即啟動該背隙消除裝 置（3)，係可以可程式控制動力單元（3 3)作動， 讓動力單元（3 3)經由管路（3 2 1 )輸人動力而推 動活塞（3 4)，使其活塞（3 4)連同帶動蝸桿（2 Ο 2)位移，此時連轴器（3 i )會吸收該蝸桿（2 2) 所產生的些微位移量〔該連轴器（3 i )上設有間隙（ Y)來吸收位移量〕，使其蝎桿（2 2)左、右牙段（ 222)、（221)的齒與第一、第二蝸輪（23) 、（2 4 )的齒貼合，而把齒與齒之間的背隙空間（X )消除，於轉換低速時可平順傳動並精確定位。 _] 接續，由第六圖所示為表示背隙消除的狀態，當在[0006] 100113026 state, but if the backlash state needs to be adjusted, it needs to adjust the circumferential phase of the inner and outer worms to eliminate the backlash state, but the circumferential phase adjustment of the inner and outer worms is required. It is only possible to disassemble the pressing block, and therefore, there is a hindrance to the processing procedure in the implementation operation. In view of the above-mentioned shortcomings, the inventor and the research and development application have a backlash eliminating device of a transmission mechanism of the public number 2 0 1 0 3 3 5 Ο 1 , which is mainly provided with a transmission mechanism capable of driving the table to be actuated, wherein The utility model is provided with a power source for driving the masts with the left and right teeth, so that the worms respectively drive the two wheels to rotate the worm gear transmission table, and the worm has the displacement to adjust the backlash of the transmission worm wheel. However, the above structure is required to be placed at the rear end of the worm because the worm passes through the center line between the two wheels at an angle, and the component that moves the worm axially shifts, so that the configuration on the machine table takes up space. Therefore, in view of this, the inventors have been researching and improving the existing structures and defects by providing rich experience in design and development and actual production of the relevant industries for many years, and providing a backlash elimination device for the transmission mechanism, in order to achieve better practical value. The purpose of the person. SUMMARY OF THE INVENTION The present invention provides a backlash eliminating device for a transmission mechanism, which is mainly for increasing torque during transmission, eliminating thrust, and improving space configuration, thereby utilizing a power driving piston to The axial displacement worm is achieved, and the backlash of the worm and the worm wheel during transmission is eliminated, thereby achieving the backlash elimination designer between the worm and the table drive. The purpose and function of a transmission mechanism of the present invention is achieved by the following techniques: Form No. 1010101 Page 5 of 23 1002021713-0 [0007] 201241340 [0008] It is mainly provided with a drivetable table actuation The transmission mechanism is provided with a power source for driving a worm integrally formed with left and right segments, and the mast is arranged in parallel with the rack of the table, so that when the worm drives the two wheels to rotate, one of the two The exhausting wheel is steered by an intermediate wheel, thereby driving the table to move the turret; thereby, the worm wheel of the left and right segments of the worm can cancel the thrust and the average burden torque, and achieve the function of conveying the large torque. [0009] The purpose and function of the backlash eliminating device of the transmission mechanism of the present invention are achieved by the following technologies: [0010] It is mainly provided with a transmission mechanism for driving the table to be driven, and a power source is provided The worm is integrally formed with the left and right segments, and a backlash eliminating device is disposed between the left and right segments of the mast, and the backlash eliminating device generates power and preload adjustment through a power unit driving the piston, thereby pushing The axial displacement of the worm eliminates the backlash; thereby, the effect of accurate transmission and positioning is achieved by the backlash eliminating device. [Embodiment] [0011] For a more complete and clear disclosure of the technical content, the object of the invention and the effects thereof achieved by the present invention, the following detailed description is provided, and the drawings and FIG. 1 is a schematic cross-sectional view showing a backlash eliminating device of a transmission mechanism according to the present invention, which is provided with a workbench carrying a workpiece under the workbench. a parallel displacement transmission mechanism (2), the transmission mechanism (2) is provided with a power source (2 1) for driving a worm (2 2 ) having left and right segments (222) and (221) [the left and right segments (2 2 2 ), ( 2 2 1 ) is integrally formed in the worm 100113026 Form No. A0101 Page 6 of 23 100202Π13-0 201241340 [0014] 00 [0015] [0016] ❹ [0017] 100113026 Form No. Α0101 (2 2) is respectively equipped with ι moving two worm wheels (2 3), (2 4) and 捍 (22) is provided with a backlash eliminating device (3), and the backlash eliminating device (3) includes : Coupling (31), which is connected to the power source (2 1 ) output shaft (2 11) material rod (22) and has absorption 埚捍(2 2) The component of the micro-displacement; the sleeve (3 2)' is correspondingly set between the left and right segments (2 2 2 ) and (221) of the worm (2 2), and the sleeve ( 3 2) There is a pipeline (321). The power unit (3 3) is connected to the pipeline (3 2 1 ) of the sleeve (32); and the piston (3 4) is correspondingly set. Inside the bushing (3 2), the worm (22) is covered by a bearing (341) and the piston (3:): corresponding to the input power of the power unit (33), to the power unit (3 3 ) By. 3) ___(22) Displacement and return △ please - and refer to the first - to eighth figure, in the assembly, the machine is equipped with a transmission mechanism (2) corresponding to the work side, and the transmission mechanism (2) is the source of force ( Sichuan, and the power source (21) output shaft ( | end material set backlash elimination device (3) coupling (3 (31) - end assembly has left and right segments (2 left...! 21 The worm (22), the horse rod (22): (2 2 2 ), (221) respectively correspond to the first and first worm gears (23), (24), so that the first and the Page 7 of 23: 1002021713-0 201241340 The steering of the worm gear (2 3) is reversed to allow the thrusts to cancel each other and torsion, followed by the 'the second and second wheels (23), (of the central axis There are respectively connected transmission wheels (231), 1)' and the transmission wheel of the first-worm wheel (23) (2 should be meshed with a steering effect intermediate wheel (25) to transmit to the first-driven wheel (26) ) 'and via the first-driven wheel) the transmission wheel (261) and the rack (28) set by the central axis, and the transmission wheel (241) of the second worm wheel (24) corresponds to the "-driven wheel (2) 7) halogen transmission power, and via the second slave (27) The transmission wheel (271) provided by the central shaft is spliced with the fixed toothed rack (28), so that the first and second driven wheels (2:) and (27) are driven wheels (261). And (271) rotating in the same direction on the rack (28) to drive the parallel displacement of the guarding station. [0018] [0019] Continued to the worm (22) left and right segments (M2), ( 2 2 1 ) is provided with a bushing (32), and the pipe (321) on the bushing (32) corresponds to the guiding power unit (33), which can be hydraulically or The air pressure mode is that the air cylinder or the hydraulic cylinder U can be programmed to control the power unit (10), and then the piston (34) is assembled in the sleeve (32) to allow the piston (34) and the bearing (341). Covering the worm (22) and corresponding to the input power of the power unit (3 3). When operating, when the power source (2 1) drives the mast (22) to drive the first and second wheels ( 23), (24) and let the workbench act 'under high-speed transmission, the transmission of the worm (22) and the _th, second worm gear (2 3 ), (24) will have the inertia transfer 100113026 Form No. A0101 苐8 pages/Total 23 pages 1002021713-0 2 01241340 moves 'the worm (2 2) and the first and second worm wheels (2 3), (2 4) create a backlash space (X) between the teeth, and the backlash space (X) There is a reduction in the wear and collision between the teeth and the teeth. However, when stopping or low-speed preloading, the backlash space (X) needs to be eliminated to accurately position the teeth and teeth. Therefore, the backlash is activated. The device (3) can be programmed to control the power unit (3 3) to operate, and the power unit (3 3) can be driven by the pipeline (3 2 1 ) to push the piston (3 4) to make the piston (3 4) ) together with the displacement of the worm (2 Ο 2), the coupling (3 i ) absorbs some of the micro-displacement generated by the worm (2 2 ) (the coupling (3 i ) is provided with a clearance ( Y) To absorb the displacement amount], the teeth of the left and right segments (222) and (221) of the mast (2 2) are fitted to the teeth of the first and second worm wheels (23) and (2 4 ), and The backlash space (X) between the teeth is eliminated, and the transmission can be smoothed and accurately positioned at low speeds. _] Continuation, as shown in the sixth figure, the state of backlash elimination, when
背隙消除時其第-、第二從動輪（26)、（27)之 傳動輪（261) ' (271)呈反向帶動，因此，傳 動輪（2 6 1 )、（ 2 7 1 )會逆向對應傳動工作台齒 條（28)，於圖式中表示，該第一從動輪（26)之 傳動輪（26 1)為右轉傳動，因此，傳動輪（26ι )之右齒面與齒條（28)之左齒面相貼合而第二從 動輪（27)之傳動輪（271)為左轉傳動，因此， 傳動輪（2 7 1 )之左齒面與齒條（2 8)之右齒面相 貼合’以«隙消除賴態下有精密的傳純置；而第 七〜八圖所示係表示背„除時的傳達動力的狀態示意 100113026 表單編號A0101 第9頁/共23頁 1002021713-0 201241340 圖(—)、f" 一、 係經由選擇二消除時其動力的傳動方式， 齒條（=)Ζ=:26)之傳動輪（“I)於 動輪（川）於齒條（28) ^動輪（27)之傳 工作台平行位移者。 ％左轉傳動，來帶動 [0021] [0022] [0023] 動狀未做f隙消除的狀態，當傳 動輪(261)二;:輪(26)、（27)之傳 (2 71 )於齒條（2 8) 轉動來帶動工作台平行位移，該兩傳動輪(=向 (271)為左轉傳動，因此，傳動輪（2H)、（ 271)之左齒面與齒條（28)之右齒面 )上傳動’達到同時平均分攤扭力的功效 。另外，上述齒條（28)結構以齒輪間的滚動傳導， 達到速度快及不佔空間的功效。 前述之實施例或圖式並非限定本發明之結構樣態或 尺寸，任何所屬技術領財具有財知識叙適當變化 或修飾，皆應視為不脫離本發明之專利範疇。 藉由以上所述，該元件之組成與使用實施說明可知 ’本發明與現有結構相較之下，具有下列諸多優點，詳 述如下： [_ 1、本發明傳誠叙㈣消除裝置，藉由蝸桿與妈輪 對應在固定的齒條上傳動，以帶動工作台位移，因此所 佔用之空間小且相對可達到快速的傳動效果，具有改善 習知的缺失。 100113026 表單編號A0101 第10頁/共23頁 1002021713-0 201241340 [0025] 2、本發明傳動機構之背隙消除裝置中所設之一體成形 具有左、右牙的蝸桿，分別帶動蝎輪轉動，可讓推力互 相抵消及平均負擔扭力，達到以簡單的小型機構，來傳 達大扭力的設計者。 [0026] 3、本發明傳動機構之背隙消除裝置，利用蝸桿與蝸輪 的傳動可控制無背隙狀態所造成的磨損及碰撞破壞，除 達到蝸桿與蝸輪於預壓降速的傳動定位，亦可確保構件 的使用壽命者。 〇 [0027] 综上所述，本發明實施例確能達到所預期之使用功 效，又其所揭露之具體構造，不僅未曾見於同類產品中 ，亦未曾公開於申請前，誠已完全符合專利法之規定與 要求，爰依法提出發明專利之申請’懇請惠予審查，並 賜准專利，則實感德便。 【圖式簡單說明】 [0028] 第一圖：本發明之整體剖視示意圖（一） [0029] 第二圖：本發明之整體剖視示意圖（二） [0030] 第三圖：本發明之俯視傳動示意圖 [0031] 第四圖：本發明之動作局部放大示意圖（有背隙狀態） [〇〇32] 第五圖：本發明之動作示意圖（背隙消除狀態） [0033] 第六圖：本發明之齒條傳動放大示意圖（背隙消除狀離 ) [0034] 第七圖：本發明背隙消除時傳達動力的狀態示意圖 100113026 表單編號A0101 第11頁/共23頁 1002021713-0 201241340 [0035] 第八圖：本發明背隙消除時傳達動 力的狀態示意圖 (二 [0036] 第九圖·本發明之齒條傳動放大示意圖 (未做背隙消除 【主要元件符號說明】 [0037] (2 ) 傳動機構 (21) 動力源 [0038] (2 11) 出力軸 (22) 蝸桿 [0039] (2 2 1 ) 右牙段 ( 2 2 2 ) 左牙段 [0040] (2 3 ) 第一蜗輪 (2 3 1 )傳動輪 [0041] (24) 第二蜗輪 (2 4 1 )傳動輪 [0042] (2 5 ) 中間輪 (26) 第一從動輪 [0043] (2 61)傳動輪 (27) 第二從動輪 [0044] (2 71)傳動輪 (28) 齒條 [0045] (3 ) 背隙消除裝置 (31) 連軸器 [0046] (3 2 ) 軸套 (321) 管路 [0047] (3 3 ) 動力單元 (34) 活塞 [0048] (3 4 1 )軸承 (X) 背隙空間 [0049] (Y) 間隙 100113026 I單編號A0101 第12頁/共23頁 1002021713-0When the backlash is eliminated, the drive wheels (261) ' (271) of the first and second driven wheels (26) and (27) are reversely driven. Therefore, the drive wheels (2 6 1 ) and ( 2 7 1 ) will Reversely corresponding to the transmission table rack (28), shown in the figure, the transmission wheel (26 1) of the first driven wheel (26) is a right-turning transmission, therefore, the right tooth surface and the tooth of the transmission wheel (26 ι) The left tooth surface of the strip (28) is fitted and the drive wheel (271) of the second driven wheel (27) is a left turn drive. Therefore, the left tooth surface of the drive wheel (2 7 1 ) and the rack (28) The right flank is fitted with 'there is a precise transmission purely under the lash elimination state; and the seventh to eighth diagrams show the state of the transmission kinetics when the back is removed. 100113026 Form No. A0101 Page 9 of 23 Page 1002021713-0 201241340 Figure (-), f" First, the transmission mode of the power when the second is eliminated by the selection, the gear wheel of the rack (=) Ζ =: 26) ("I) in the moving wheel (Chuan) in the tooth Article (28) ^The moving wheel (27) is transmitted parallel to the table. % Left-turn drive to drive [0021] [0022] [0023] The state of the un-flock elimination is removed when the drive wheel (261) is two; the wheel (26), (27) is transmitted (2 71) The rack (2 8) rotates to drive the parallel displacement of the table. The two transmission wheels (= direction (271) are left-turn transmission, therefore, the left tooth surface of the transmission wheel (2H), (271) and the rack (28) The right tooth surface) is driven to achieve the effect of evenly distributing the torque at the same time. In addition, the above-mentioned rack (28) structure is guided by the rolling between the gears, and achieves the effect of high speed and no space occupation. The above-mentioned embodiments or drawings are not intended to limit the structure or the dimensions of the present invention. Any changes or modifications of the technical knowledge of the present invention should be considered as not departing from the scope of the invention. As described above, the composition of the component and the implementation description show that the present invention has the following advantages as compared with the prior art, and is described in detail as follows: [1] The present invention is based on (4) the elimination device, by The worm and the mother wheel are correspondingly driven on the fixed rack to drive the displacement of the table, so the occupied space is small and relatively fast transmission effect can be achieved, and the lack of improvement is known. 100113026 Form No. A0101 Page 10 / Total 23 1002021713-0 201241340 [0025] 2. The backlash elimination device of the transmission mechanism of the present invention is formed with a worm having left and right teeth, respectively, which respectively drives the 蝎 wheel to rotate, Let the thrusts offset each other and the average burden of torque, to achieve a simple small mechanism to convey the design of large torque. [0026] 3. The backlash eliminating device of the transmission mechanism of the present invention can control the wear and collision damage caused by the backlash-free state by using the transmission of the worm and the worm wheel, in addition to the transmission positioning of the worm and the worm wheel at the pre-pressure reduction speed, A person who ensures the life of the component. [0027] In summary, the embodiments of the present invention can achieve the expected use efficiency, and the specific structure disclosed therein has not been seen in the same product, nor has it been disclosed before the application, and has completely complied with the patent law. The provisions and requirements, the application for the invention of a patent in accordance with the law 'please request for review, and grant a patent, it is really sensible. BRIEF DESCRIPTION OF THE DRAWINGS [0028] FIG. 1 is a schematic cross-sectional view of an overall cross-sectional view of the present invention (1) [0029] FIG. 2 is a schematic cross-sectional view of the present invention (2) [0030] FIG. Schematic diagram of overhead view [0031] Fourth diagram: partial enlarged view of the action of the present invention (with backlash state) [〇〇32] Fifth diagram: schematic diagram of the action of the present invention (backlash elimination state) [0033] Fig. 6 Schematic diagram of the rack drive of the present invention (backlash elimination) [0034] Figure 7: Schematic diagram of the state of transmitting power when the backlash is eliminated in the present invention 100113026 Form No. A0101 Page 11 of 23 1002021713-0 201241340 [0035 Fig. 8 is a schematic view showing the state of transmitting power when the backlash is eliminated in the present invention (2) [0036] Fig. 9 is an enlarged schematic view of the rack drive of the present invention (no backlash elimination is performed [main component symbol description] [0037] (2 Transmission mechanism (21) Power source [0038] (2 11) Output shaft (22) Worm [0039] (2 2 1 ) Right segment (2 2 2 ) Left segment [0040] (2 3 ) First worm gear (2 3 1 ) Transmission wheel [0041] (24) Second worm gear (2 4 1 ) transmission wheel [0042] (2 5 ) Intermediate wheel (26) First driven wheel [0043] (2 61) Transmission wheel (27) Second driven wheel [0044] (2 71) Transmission wheel (28) Rack [0045] (3) Backlash elimination device (31) Coupling [0046] (3 2 ) Bushing (321) Piping [0047] (3 3 ) Power unit (34) Piston [0048] (3 4 1 ) Bearing (X) Backlash space [0049 ] (Y) Clearance 100113026 I Single No. A0101 Page 12 of 23 1002021713-0