M437759 五、新型說明： 【新型所屬之技術領域】 一種液靜壓 轉盤=有關"加，’特… 【先前技術】 .如圖1所示，現有—種液靜麼轉盤驅動裝置(TW證書 號M417221㈣案的先前技術），具有一機座i、一安裝在M437759 V. New description: [New technical field] A hydrostatic rotary disk = related "plus, 'special... 【Previous technology】 As shown in Figure 1, the existing liquid static rotary drive (TW certificate) No. M417221 (four) prior art), with a base i, one installed in
該機座1的液_承2、-軸設在該液靜壓軸承2内部的 驅動軸3及-可驅動該驅動轴3的驅動單元4。該驅動轴3 具有-轉盤3〇1’該驅動單元4具有一安裝於該機座i的馬 達術、-可輸出該馬達4〇1動力.的主動輪術、一受該主 動輪402驅動且固設在該驅動軸3的被動輪如及一繞設 在該主動輪402與該被動輪4〇3外部的皮帶4〇4。該液靜壓 轴承2具有-轴孔·2()1及多數油腔2〇2，利用在該等油腔 202中導入液壓油，可在該液靜壓軸承2與該㈣心之間 形成油膜。 雖然利用該液靜壓軸承2可使該驅動轴3利用油液包 覆潤滑的作用而旋轉作動，但因該驅動單元4會對該驅動 軸3產生-朝該主動輪4〇2的側向拉力’進而會影響該驅 動軸3的中心精度。 另外，圖1所示的液靜壓轉盤驅動裝置亦存在有：當加 工機跳電或停電時，液壓油停止供給，且該驅動單元4的 馬達401停止運轉後，該驅動軸3受到慣性作用仍然會持 續轉動，則將會導致該驅動軸3與該液靜壓軸承2產生磨 3 耗’而會影響加工的精度β 再如圖2所示，證書號Μ417221專利案的結構特徵， 主要是將一驅動軸5分成一第一轉軸件5〇1、一第二轉軸件 5〇2及一聯接在該第一、二轉軸件5〇1、5〇2之間的聯軸器 503，這種結構雖有似解決該第二轉軸件5〇2受有側向拉力 作用的影響’卻仍有下列問題： 、該驅動轴5分製成該第一轉輛件5〇1、該第二轉軸 ^〇2與該聯軸胃5〇3,其中該第一轉轴件5〇ι與㈣二轉 轴件502分別安裝在不同軸孔位置，使得組配後的中心精 度控制較為困難，且會影響加工機的加工精度。 一锊神仟501、5〇2之間的聯軸著 會導致該㈣軸5的中段祕較不足，當—驅動單元 帶動該第二轉轴件502轉動時，會因為該聯轴H 503而導 _第-、二轉軸件501'5〇2之間產生扭變，當該驅動勒 所承放的加工件負載大時，更容易造成該聯軸器如損續 二另外’由於該驅動單元6的動力是透過一皮帶6〇ι驅鸯 =驅動轴5的第二轉轴件地，再利用該聯軸器503連㈣ =轉轴件ΜΠ’當該驅動單元6的馬達作緊急煞車時，驾 ^觀會對該第二轉軸件如產生制動作用，但該驅鸯 轴5仍會繼續慣性轉動，導致該聯轴器5〇3所承受的扭力 大，容易損壞。 二、該第二轉轴件5〇2底部轴設在-承架組7上，" 6玄承架組7又固設在一機座8上，冬 的皮㈣m “該承當更^驅動單元 M437759 【新型内容】 因此，本新型之目的，即在提供一種可確保一驅動軸 的中心精度、結構剛性佳、不產生扭變之液靜壓轉盤驅動 裝置。 於是，本新型之液靜壓轉盤驅動裝置，包含一機座、 -液靜縣承、-驅動軸及—驅動單元。該機座具有一貫 孔及-對應該貫孔的軸承座，該罐軸承相反於該軸承 座且安裝於該機座，並具有-沿-轴線設置且與該貫孔相 通的軸孔及-圍繞該軸線且與該軸孔相連通的第一油腔， 該驅動軸軸設在該軸孔中’並具有一對應該第一油腔的第 一軸段、一固設在該第-軸段-端且位於該液靜壓軸承上 方的轉盤及一固設在該第一軸段另一端且位於該液靜壓轴 承下方的第二轴段，該第二軸段穿過該貫孔及該轴承座， 該驅動單元具有—馬達、-可輸出馬達動力的主動輪、一 受該主動輪驅動且套設在該料座外部的被動輪、一連社 =該被動輪與㈣二減之間的聯軸ϋ及多數套設在該被 動輪與該軸承座之間的軸承。 本新型之功效：利用該驅動抽的第一轴段、該轉盤、 该第二軸段固結呈一體’可使該驅動軸的剛性佳、中心精 度佳’且利用該聯軸器連結在該被動輪與㈣二軸段之門 ’亦可使該㈣轴被驅動時不扭變，不僅可確保加工精产 ’且可延長該驅動軸的使用壽命，且配合—制動單元可^ 不利用該馬達煞車，該聯轴器不承受煞車之扭力。 【實施方式】 有關本新型之前述及其他技術内容、特點與功效，在 以下配合參考圖式之—個較佳實施例的詳 清楚的呈現。 如圖3所示，本新型液靜壓轉盤驅動裝置之較佳實施 例i包含一機座1〇、一液靜壓轴承20、-驅動轴30、-驅 動單元40及一制動單元5〇。 12 孔 該：座10具有一頂面u、一與該頂面u相反的底面 、一貫穿該頂面u與該底面12的貫孔13及—對應該貫 U且安裝於該底面12的軸承座14。 該液靜壓軸承20相反於該轴承座14且安裝於該機座 1(>的頂面11 ’並具有一沿一軸線L設置且與該貫孔η相 通的軸孔21、-圍繞該轴線L且與該轴孔2ι相連通的第— ，由腔22及—對設於該軸孔21外部且位於該第—油腔22上 方的第二油腔23。 該驅動軸30軸設在該軸孔21中，並具有—對應該第 一油腔22的第一轴段31、一固設在該第一軸段3ι 一端且 位於該液靜壓軸承20上方的轉盤32、一固設在該第一軸段 31另一端且位於該液靜壓轴承2〇下方的第二軸段及^ 固設在該第一轴段31的盤部34〇該第二軸段B穿過該貫 孔13及該轴承座14,並具有一栓齒部331該盤部具有 二相反設置且垂直於該軸線L的端面341，該等端面3::相 鄰於該等第二油腔23。本實施例的第一軸段31、該第一軸 段33與該盤部34可為一體成型，再使該轉盤32固接於該 第一軸段31即可構成該驅動軸30。 ^ M437759 該驅動單元4〇具有-馬達41、—可輪出該馬達4i動 力的主動輪42、一受該主動輪42驅動且套設在該軸承座 14外部的被動輪43、-套設在該主動輪42與該被動輪^ 之間的皮帶44、一連結在該被動輪43與該第二軸段μ之 間的聯軸器45及多數套設在該被動輪“與該軸承座“之 間的軸承46。該聯軸器45具有一固設在該被動輪43底部 的上聯轴件451及-固接在該上聯轴件451底部的下聯轴The liquid bearing 2 and the - shaft of the base 1 are provided in the drive shaft 3 inside the hydrostatic bearing 2 and the drive unit 4 which can drive the drive shaft 3. The drive shaft 3 has a turntable 3〇1'. The drive unit 4 has a motor mounted on the base i, a drive wheel that can output the motor 4〇1, and is driven by the drive wheel 402. A passive wheel fixed to the drive shaft 3, for example, and a belt 4〇4 wound around the drive wheel 402 and the driven wheel 4〇3. The hydrostatic bearing 2 has a shaft hole 2 () 1 and a plurality of oil chambers 2 〇 2, and a hydraulic oil is introduced into the oil chambers 202 to form a gap between the hydrostatic bearing 2 and the (four) core. Oil film. Although the driving shaft 3 can be rotated by the action of oil coating lubrication by the hydrostatic bearing 2, the driving unit 4 generates the side of the driving shaft 3 toward the driving wheel 4〇2. The pulling force 'in turn affects the center accuracy of the drive shaft 3 . In addition, the hydrostatic rotary disk drive device shown in FIG. 1 also has: when the machining machine is powered off or power is off, the hydraulic oil stops supplying, and after the motor 401 of the drive unit 4 stops operating, the drive shaft 3 is subjected to inertia. If it continues to rotate, it will cause the drive shaft 3 and the hydrostatic bearing 2 to generate grinding 3 ', which will affect the processing accuracy β. As shown in Figure 2, the structural features of the certificate No. 417221 patent are mainly A drive shaft 5 is divided into a first shaft member 5〇1, a second shaft member 5〇2, and a coupling 503 coupled between the first and second shaft members 5〇1, 5〇2, which Although the structure seems to solve the influence of the lateral pulling force of the second rotating shaft member 5〇2, the following problems still exist: The driving shaft 5 is divided into the first rotating member 5〇1, the second The rotating shaft 〇2 and the coupling shaft 5〇3, wherein the first rotating shaft member 5〇1 and the (four) two rotating shaft member 502 are respectively installed at different axial hole positions, so that the central precision control after assembly is difficult, and Will affect the processing accuracy of the processing machine. A coupling between the gods 501 and 5〇2 causes the middle section of the (four) shaft 5 to be less than sufficient. When the driving unit drives the second shaft member 502 to rotate, it will be due to the coupling H 503. The first and second shaft members 501'5〇2 are twisted. When the load of the workpiece carried by the driver is large, it is more likely to cause the coupling to be damaged. The power of 6 is driven by a belt 6 〇 鸯 = the second shaft of the drive shaft 5, and then the coupling 503 is connected (four) = the shaft member ΜΠ 'When the motor of the drive unit 6 is used for emergency braking The driving mechanism will generate a braking effect on the second rotating shaft member, but the driving shaft 5 will continue to rotate inertially, resulting in a large torque and easy to be damaged by the coupling 5〇3. 2. The bottom shaft of the second shaft member 5〇2 is arranged on the frame group 7, and the “6 Xuan frame group 7 is fixed on a machine base 8, and the winter skin (four) m “the drive is more driven” Unit M437759 [New content] Therefore, the object of the present invention is to provide a hydrostatic rotary disc drive device which can ensure the center precision of a drive shaft, has good structural rigidity, and does not cause a twisting. Thus, the hydrostatic pressure of the present invention The turntable driving device comprises a machine base, a liquid static county bearing, a driving shaft and a driving unit. The machine base has a constant hole and a bearing seat corresponding to the through hole, and the tank bearing is opposite to the bearing seat and is mounted on the The base has a shaft hole disposed along the axis and communicating with the through hole and a first oil chamber surrounding the axis and communicating with the shaft hole, and the drive shaft is disposed in the shaft hole And having a pair of first shaft sections corresponding to the first oil chamber, a turntable fixed to the first shaft section end and located above the hydrostatic bearing, and a fixed position at the other end of the first shaft section a second shaft section below the hydrostatic bearing, the second shaft section passes through the through hole and the bearing seat, the driving The utility model has a motor, a driving wheel capable of outputting motor power, a driven wheel driven by the driving wheel and disposed outside the material seat, a connecting body = a coupling between the passive wheel and the (four) two minus and a majority The bearing is disposed between the driven wheel and the bearing seat. The utility model has the following advantages: the first shaft section pumped by the driving, the rotating wheel and the second shaft section are integrated into one body to make the driving shaft rigid Good, good center precision and the use of the coupling to the passive wheel and the door of the (four) two-axis section can also make the (four) shaft drive without twisting, which not only ensures the precision of the production and can extend the drive The service life of the shaft, and the cooperation-braking unit can not use the motor to brake, and the coupling does not bear the torque of the brake. [Embodiment] The foregoing and other technical contents, features and effects of the present invention are incorporated in the following reference. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT As shown in Fig. 3, a preferred embodiment i of the hydrostatic rotary disk drive device of the present invention comprises a base, a hydrostatic bearing 20, Drive shaft 30, drive unit 40 and a brake Unit 5〇. 12 hole: the seat 10 has a top surface u, a bottom surface opposite to the top surface u, a through hole 13 extending through the top surface u and the bottom surface 12, and corresponding to the U and mounted thereon a bearing housing 14 of the bottom surface 12. The hydrostatic bearing 20 is opposite to the bearing housing 14 and is mounted to the top surface 11' of the housing 1 (> and has an axis L disposed along the axis L and communicating with the through hole η a shaft hole 21, a first portion surrounding the axis L and communicating with the shaft hole 2, a cavity 22 and a second oil chamber 23 disposed outside the shaft hole 21 and above the first oil chamber 22 The drive shaft 30 is axially disposed in the shaft hole 21 and has a first shaft section 31 corresponding to the first oil chamber 22, a fixed end at the first shaft section 3, and located at the hydrostatic bearing 20 The upper turntable 32, a second shaft section fixed to the other end of the first shaft section 31 and located below the hydrostatic bearing 2〇, and a disk portion 34 fixed to the first shaft section 31 The two-axis segment B passes through the through-hole 13 and the bearing housing 14 and has a pinion portion 331 having two opposite end faces 341 disposed perpendicular to the axis L, the end faces 3: adjacent to the Waiting for the second oil Cavity 23. The first shaft segment 31, the first shaft segment 33 and the disk portion 34 of the embodiment can be integrally formed, and the turntable 32 can be fixed to the first shaft segment 31 to constitute the drive shaft 30. ^ M437759 The drive unit 4 has a motor 41, a driving wheel 42 for driving the motor 4i, a driven wheel 43 driven by the driving wheel 42 and sleeved outside the bearing housing 14, a belt 44 between the driving wheel 42 and the driven wheel, a coupling 45 coupled between the driven wheel 43 and the second shaft segment μ, and a plurality of sleeves disposed on the driven wheel "with the bearing housing" Between the bearings 46. The coupling 45 has an upper coupling member 451 fixed to the bottom of the driven wheel 43 and a lower coupling fixed to the bottom of the upper coupling member 451.
件452，該下聯轴件452具有一可與該栓齒部331嵌結 槽孔453。 Ή 該制動單元50具有一可對該驅動車由3〇產生制動的制 動盤51、一为^在該制動盤$ 1兩側的制動器5 2、二可提 供該等制動器52朝該制動盤51彈抵的彈性件53及一換向 控制器54，該制動盤51固設在該驅動單元4〇的聯軸器“ 的下如軸件452上’該換向控制器54可控制液壓油流向，The lower coupling member 452 has a slot 453 engageable with the pin portion 331. The brake unit 50 has a brake disc 51 that can brake the drive vehicle from 3 turns, and a brake 5 2 on both sides of the brake disc $1. The brakes 52 can be provided to the brake disc 51. The resilient member 53 and the reversing controller 54 are fixed to the coupling of the driving unit 4 “ "down to the shaft member 452". The reversing controller 54 can control the flow of hydraulic oil. ,
且可控制該等制動器52相對於該制動盤5ι靠抵或遠離。 Ώ 3所示，在正常狀態下，該第一油腔22與該第 '由腔23 _會導入液壓油，且使該驅動轴30的第-軸段 31的周面舆該液靜壓軸承2〇之間形成有油膜，該盤部广* 的，面341與該液靜壓轴承20之間也形成有油膜，即 可提供該驅動軸30順暢轉動。 利用該驅動軸30的第—軸段31、該轉盤32、該第二 “又33與該盤部34固結呈-體，所以該驅動軸30的結構 剛I·生佳。再利用該驅動單元⑽的被動輪套設在該 座1 4外部、榮A , -y, 〇等軸承46套設在該被動輪43與該軸承座l4 7 M437759 之間，以及該聯軸器45連結在該被動輪43與該第二轴段 Μ之間，則該馬達41利用該皮帶44傳遞至該被動輪一“二 動力，是透過該聯軸器45連動該驅動軸3〇轉動，所以不 會直接對該驅動軸3G產生側向拉力，可以降低該驅動軸％ 與該液靜㈣承20㈣耗，所以可以使該驅動軸3〇確保 穩定之中心精度。 也利用該被動輪43套設在該軸承座14外部，以及該 聯軸器45連結在該被動輪43與該第二軸段33之間可使 該被動輪43相對於該驅動轴3〇的軸線L容易校正同心度 ，也可確保該驅動軸30的中心精度及加工精度。 在該驅動軸30正常運轉的狀態下，該等制動器K受 液壓作用可常保持在與該制動盤51分離的一鬆釋狀態(如圖 3之實線所示，此時該等彈性件53呈被壓縮狀態）。 再者，當加工機跳電、停電，且使該馬達Ο停止運轉 、液壓油停止供給時，該換向控制器54控制液屋油流向（圖 未示），且如圖3假想線所示，該等制動器52分別受到該等 彈性件53之彈力作用，可由鬆釋狀態轉換成—對該制動盤 51產生制動的制動狀態’即可使該驅動轴30隨即停止運轉 ，不會受到轉動慣性作用而繼續轉動，且可避免該驅動轴 3〇與該液靜壓軸承加產生磨耗，而可確保加工的精度。 且因為該驅動軸30的結構剛性佳，又與該制動盤51 固結呈-體，所以該聯轴器45不會承受制動的作用力，該 驅動轴30可以承受較大之扭力，不會發生扭變。 因此本新型可解決如圖1所示之現有液靜壓轉盤驅 動裝置的缺失。 圖2之液靜壓轉盤驅動裝 另外，本新型之結構相較於 置亦可產生下列功效： 〜驅動軸3〇的第-軸段31、該轉盤32、該第二 段33與該盤部34固結呈一體，沒有組配後的中心精度 控制困難的問題：可確保加工機的加工精度。 h 軸器45聯結在該被動輪43與該驅動軸30的 L二轴段。:3_底部之間，並不會影響該驅動軸3。的剛性， 田义驅動單疋4〇的主動輪42透過該皮帶44帶動該被動輪 43轉動時，會再利用該聯軸器45帶動該驅動軸30轉動， ~驅動軸3G不會產生扭變，即使該驅動軸所承放的加 件負載大4 ’固結成_體的聯轴器45與該被動輪Μ也 不谷易相壞。另外’本新型將該制動盤5ι固接在該驅動轴 30底和且3玄制動盤51可受該等制動器52制動煞車，所 以可以不利用該馬達41煞車，且煞車時是利用該等制動器 52直接對$驅動軸3Q產生制動’該聯轴器μ不受煞車力 作用’也可確保使用壽命。 一、該皮帶44套設在該主動輪42與該被動輪43外部 ，欲更換時，只須先拆下對應於該主動輪42的一側，再使 另一側繞過該制動盤51，即可進行替換，所以該皮帶44的 拆卸替換相當容易。 惟以上所述者，僅為本新型之較佳實施例而已，當不 能以此限定本新型實施之範圍，即大凡依本新型申請專利 範圍及新型說明内容所作之簡單的等效變化與修飾，皆仍 M437759 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是現有一種液靜壓轉盤驅動裝置的組合剖面圖； 圖2是現有另一種液靜壓轉盤驅動裝置的組合剖面圖 :及 圖3是一平面組合圖，說明本新型液靜壓轉盤驅動裝 置的一較佳實施例。And the brakes 52 can be controlled against or away from the brake disc 5i. As shown in FIG. 3, in the normal state, the first oil chamber 22 and the first chamber 23 are hydraulic oil introduced, and the circumferential surface of the first shaft section 31 of the drive shaft 30 is clamped to the hydrostatic bearing. An oil film is formed between the two sides, and an oil film is formed between the surface 341 and the hydrostatic bearing 20, so that the drive shaft 30 can be smoothly rotated. The first shaft section 31 of the drive shaft 30, the turntable 32, and the second "33" are consolidated with the disk portion 34, so that the structure of the drive shaft 30 is good. The drive is reused. The passive wheel sleeve of the unit (10) is disposed outside the seat 14 , the bearing A of the A, -y, and the like is sleeved between the driven wheel 43 and the bearing housing 14 7 M437759, and the coupling 45 is coupled thereto. Between the passive wheel 43 and the second shaft segment ,, the motor 41 is transmitted to the passive wheel by the belt 44. The two powers are rotated by the coupling 45 through the coupling 45, so that the motor 41 does not directly The lateral pulling force is generated on the drive shaft 3G, so that the drive shaft % and the liquid static (four) bearing 20 (four) consumption can be reduced, so that the drive shaft 3 can ensure stable center accuracy. The passive wheel 43 is also sleeved on the outside of the bearing housing 14, and the coupling 45 is coupled between the driven wheel 43 and the second shaft segment 33 to make the driven wheel 43 relative to the drive shaft 3 The axis L easily corrects the concentricity, and also ensures the center accuracy and machining accuracy of the drive shaft 30. In the state in which the drive shaft 30 is normally operated, the brakes K can be constantly maintained in a released state separated from the brake disc 51 by hydraulic action (as shown by the solid line in FIG. 3, at this time, the elastic members 53) Being compressed). Furthermore, when the processing machine is powered off, power is off, and the motor is stopped, and the hydraulic oil is stopped, the reversing controller 54 controls the flow of the liquid house oil (not shown), and as shown by the imaginary line in FIG. The brakes 52 are respectively subjected to the elastic force of the elastic members 53 and can be converted into a braking state of braking the brake disc 51 by the released state, so that the driving shaft 30 can be stopped immediately without being subjected to rotational inertia. The rotation continues, and the wear of the drive shaft 3〇 and the hydrostatic bearing can be avoided, and the precision of the machining can be ensured. And because the structural rigidity of the drive shaft 30 is good, and the brake disc 51 is consolidated with the body, the coupling 45 does not bear the braking force, and the drive shaft 30 can withstand a large torque, and will not A twist has occurred. Therefore, the present invention can solve the lack of the existing hydrostatic turntable driving device as shown in FIG. In addition, the structure of the present invention can produce the following effects as compared with the following: - the first shaft section 31 of the drive shaft 3〇, the turntable 32, the second section 33 and the disc portion The 34-consolidation is integrated, and there is no problem of difficulty in controlling the center accuracy after assembly: it can ensure the processing accuracy of the processing machine. The h-axis 45 is coupled to the L-axis section of the driven wheel 43 and the drive shaft 30. :3_ between the bottom and does not affect the drive shaft 3. The rigidity of the drive shaft 32 is driven by the belt pulley 44, and the drive shaft 30 is rotated by the coupling 45. The drive shaft 3G is not twisted. Even if the loading load of the drive shaft is 4', the coupling 45 which is consolidated into the body is not easily damaged. In addition, the present invention fixes the brake disc 5ι to the bottom of the drive shaft 30 and the 3 quasi-brake disc 51 can be braked by the brakes 52, so that the brake can be braked without using the motor 41, and the brakes are utilized when braking. 52 directly produces braking on the drive shaft 3Q 'The coupling μ is not affected by the braking force' and also ensures the service life. 1. The belt 44 is sleeved on the outside of the driving wheel 42 and the driven wheel 43. When replacing, only one side corresponding to the driving wheel 42 is first removed, and then the other side is bypassed by the brake disk 51. Replacement is possible, so the removal of the belt 44 is quite easy. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, M437759 is still covered by this new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a combined sectional view of a conventional hydrostatic rotary disk drive device; FIG. 2 is a combined sectional view of another conventional hydrostatic rotary disk drive device: and FIG. 3 is a combined view of a plane, illustrating A preferred embodiment of a novel hydrostatic turntable drive.
10 M437759 【主要元件符號說明】10 M437759 [Main component symbol description]
10·...· …·機座 341… …·端面 11 ·.... …·頂面 40•… •…驅動單元 12··.·· —底面 41 ···.· •…馬達 13 …·貫孔 42···.· •…主動輪 14 —轴承座 43 ·.··. •…被動輪 λ λ ..... ____ib册 2u..... ----瑕静哩:神承 44..... 反f L...... …·軸線 45·...· •…聯轴器 21 ··.·. •…軸孔 451 ··· •…上聯軸件 22·.... —弟 油腔 452… •…下聯軸件 23··... •…第二油腔 453… •…栓槽孔 30-···· —驅動車由 46·.... —軸承 31 ···.· •…第一轴段 50••… •…制動單元 32·.... …·轉盤 51 •…制動盤 33-···. •…第二軸段 52·.··· •…制動器 331 ··· •…栓齒部 53 ··... •…彈性件 34··.·· •…盤部 54·..·· •…換向控制器 1110·...· ...·Base 341... End face 11 ·.......Top surface 40•... •...Drive unit 12······Bottom surface 41 ·····•...Motor 13 ...·Through hole 42····· •...Drive wheel 14 - Bearing seat 43 ····. •...Passive wheel λ λ ..... ____ib book 2u..... ----瑕静哩:神承44..... 反 f L... ...·Axis 45·...· •...Coupling 21 ·····..........Axis hole 451 ··· •...Uplink Shaft member 22·....—Die oil chamber 452... •... Lower shaft member 23··... •...Second oil chamber 453... •...Bolt hole 30-···· — Drive vehicle from 46· .... — bearing 31 ····· •...first shaft section 50••... •...braking unit 32·.......turntable 51 •...brake disc 33-···. Shaft section 52····· •...Brake 331 ··· •...Plastic part 53 ··...•...elastic part 34······......part part 54·..··•... Controller 11