TW201332834A - Wheel driving apparatus - Google Patents
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- TW201332834A TW201332834A TW101135256A TW101135256A TW201332834A TW 201332834 A TW201332834 A TW 201332834A TW 101135256 A TW101135256 A TW 101135256A TW 101135256 A TW101135256 A TW 101135256A TW 201332834 A TW201332834 A TW 201332834A
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Abstract
Description
本發明係有關於使車輪的輪轂(hub)相對於軸(shaft)進行旋轉的車輪驅動裝置。 The present invention relates to a wheel drive device for rotating a hub of a wheel relative to a shaft.
以往，就供以使車輛行走之一種驅動源而言，係利用輪內馬達(in-wheel motor)。作為輪內馬達的應用對象的車輛，例如有電動自行車、電動輪椅、電動機車、電動台車、高爾夫球車等。 Conventionally, an in-wheel motor has been used as a driving source for driving a vehicle. Examples of the vehicle to be applied to the in-wheel motor include an electric bicycle, an electric wheelchair, an electric motor vehicle, an electric bicycle, a golf cart, and the like.
例如在專利文獻1中，記載有在車輪的輪轂內包馬達，而以其驅動力經介傳達機構而使車輪的輪轂旋轉驅動之內轂(in-hub)型之車輪驅動裝置。在該驅動裝置中，馬達的轉子之旋轉驅動力係首先對太陽齒輪進行旋轉驅動。於是太陽齒輪進行旋轉從而旋轉驅動與太陽齒輪咬合的3個行星齒輪。行星齒輪進行旋轉從而旋轉驅動與行星齒輪咬合之設置有內齒輪的旋轉板。此外，旋轉板的旋轉驅動力係經介單向離合器(one way clutch)旋轉驅動車轂。 For example, Patent Document 1 describes an in-hub type wheel drive device in which a motor is housed in a hub of a wheel, and a driving force thereof is used to drive a wheel hub of the wheel. In the drive device, the rotational driving force of the rotor of the motor first rotationally drives the sun gear. The sun gear then rotates to rotationally drive the three planet gears that engage the sun gear. The planetary gear rotates to rotationally drive a rotating plate provided with an internal gear that meshes with the planetary gear. Further, the rotational driving force of the rotary plate is rotationally driven to the vehicle hub via a one way clutch.
專利文獻1：日本特開2009-12627號公報。 Patent Document 1: Japanese Laid-Open Patent Publication No. 2009-12627.
就內轂型之車輪驅動裝置而言，期望以抑制車輛的車寬度而能夠將車輛收容在更狹窄的空間之方式進行小型化，具體而言即縮小軸方向的尺寸。此外，從設計上亦要求將車輪驅動裝置朝軸方向薄化。 In the inner hub type wheel drive device, it is desirable to reduce the size of the vehicle in such a manner that the vehicle can be accommodated in a narrower space by suppressing the width of the vehicle. In addition, it is also required to thin the wheel drive device in the axial direction.
然而，在如專利文獻1所記載之習知的車輪驅動裝置中，因將行星齒輪與旋轉板及單向離合器配置成朝軸方向串聯，故難以縮小車輪驅動裝置之軸方向的尺寸。 However, in the conventional wheel drive device described in Patent Document 1, since the planetary gear, the rotary plate, and the one-way clutch are arranged in series in the axial direction, it is difficult to reduce the size of the wheel drive device in the axial direction.
本發明為有鑑於前述之問題點所開發者，其目的係在於提供能夠減低軸方向之尺寸的車輪驅動裝置。 The present invention has been made in view of the above problems, and an object thereof is to provide a wheel drive device capable of reducing the size in the axial direction.
本發明之一態樣，係有關於車輪驅動裝置。該車輪驅動裝置係使車輪的輪轂相對於軸進行旋轉者，其具備：定子，固定在軸；轉子，藉由與定子的磁性相互作用而在軸之周圍進行旋轉；以及傳達機構，令欲使轉子旋轉之轉矩從轉子傳達至輪轂。傳達機構係包含：太陽齒輪，經介單向離合器而承受轉子的旋轉，並且在軸的周圍進行旋轉；行星齒輪群，與太陽齒輪咬合；以及內齒輪，固定在輪轂，並且與行星齒輪群咬合。單向離合器係以在軸方向中與行星齒輪群至少局部地重疊之方式配置。 One aspect of the present invention relates to a wheel drive device. The wheel drive device rotates a hub of a wheel relative to a shaft, and includes: a stator fixed to the shaft; a rotor that rotates around the shaft by magnetic interaction with the stator; and a transmission mechanism The torque of the rotor rotation is transmitted from the rotor to the hub. The transmission mechanism includes: a sun gear that receives the rotation of the rotor through a one-way clutch and rotates around the shaft; a planetary gear group that meshes with the sun gear; and an internal gear that is fixed to the hub and meshes with the planetary gear group . The one-way clutch is disposed to at least partially overlap the planetary gear group in the axial direction.
根據該態樣，即可使傳達機構之軸方向的尺寸減小達單向離合器與行星齒輪群在軸方向重複之量。 According to this aspect, the size of the transmission mechanism in the axial direction can be reduced by the amount in which the one-way clutch and the planetary gear group are repeated in the axial direction.
另外，以上之構成要素的任意組合，及/或將本發明之構成要素或表現在方法、裝置、系統等之間相互地取代者，亦有效作為本發明之態樣。 Further, any combination of the above constituent elements, and/or substitution of the constituent elements or expressions of the present invention between methods, apparatuses, systems, and the like are also effective as aspects of the present invention.
根據本發明，可減低車輪驅動裝置之軸方向的尺寸。 According to the present invention, the size of the wheel drive device in the axial direction can be reduced.
10‧‧‧車輪驅動裝置 10‧‧‧ Wheel drive
12‧‧‧輪轂 12‧‧·wheels
14‧‧‧輪輻 14‧‧‧ spokes
16‧‧‧輪胎部 16‧‧‧ tire department
18‧‧‧輪圈 18‧‧‧ rims
20‧‧‧軸 20‧‧‧Axis
20a‧‧‧第1周面開口 20a‧‧‧ Opening of the first week
20b‧‧‧第2周面開口 20b‧‧‧Opening on the 2nd week
20c‧‧‧軸中心孔 20c‧‧‧Axis center hole
22‧‧‧叉架 22‧‧‧ fork
24‧‧‧殼體 24‧‧‧Shell
24a‧‧‧接合面 24a‧‧‧ joint surface
26‧‧‧第1罩殼部 26‧‧‧1st cover
28‧‧‧第2罩殼部 28‧‧‧2nd cover
28a‧‧‧接合面 28a‧‧‧ joint surface
30‧‧‧轉子 30‧‧‧Rotor
32‧‧‧單向離合器 32‧‧‧One-way clutch
33‧‧‧平行銷 33‧‧‧ parallel sales
34‧‧‧太陽齒輪 34‧‧‧Sun Gear
36‧‧‧行星齒輪 36‧‧‧ planetary gears
36a‧‧‧第1齒輪列 36a‧‧‧1st gear train
36b‧‧‧第2齒輪列 36b‧‧‧2nd gear train
38‧‧‧內齒輪 38‧‧‧Internal gear
40‧‧‧線圈 40‧‧‧ coil
40a‧‧‧線圈端 40a‧‧‧ coil end
42‧‧‧鐵心 42‧‧‧ iron core
42a‧‧‧凸極 42a‧‧‧Surgent
44‧‧‧第1殼體 44‧‧‧1st housing
44a‧‧‧軸孔 44a‧‧‧Axis hole
44b‧‧‧第1外周壁部 44b‧‧‧1st outer peripheral wall
44c‧‧‧行星齒輪群側之上表面 44c‧‧‧Top surface of the planetary gear group side
44d‧‧‧第1殼體44之下面 44d‧‧‧ below the first housing 44
44e‧‧‧導線孔 44e‧‧‧Wire hole
44f‧‧‧第1貫穿孔 44f‧‧‧1st through hole
44g‧‧‧第2貫穿孔 44g‧‧‧2nd through hole
44h‧‧‧霍爾元件孔 44h‧‧‧ Hall element hole
46‧‧‧第2殼體 46‧‧‧ second housing
46a‧‧‧第2外周壁部 46a‧‧‧2nd outer peripheral wall
48‧‧‧孔部 48‧‧‧ Hole Department
50‧‧‧嵌入部 50‧‧‧ embedded department
52‧‧‧配線構件 52‧‧‧Wiring components
52a‧‧‧霍爾元件 52a‧‧‧ Hall element
54‧‧‧拉出配線 54‧‧‧ Pull out the wiring
56‧‧‧下突出部 56‧‧‧ under the protrusion
56a‧‧‧端面 56a‧‧‧ end face
57‧‧‧上突出部 57‧‧‧Upper protrusion
59‧‧‧連結部分 59‧‧‧Link section
60‧‧‧行星齒輪固定構件 60‧‧‧ planetary gear fixing members
62‧‧‧鐵心 62‧‧‧ iron core
62a‧‧‧磁鐵 62a‧‧‧ Magnet
64‧‧‧螺合部 64‧‧‧ screwing department
66‧‧‧轉子保持具 66‧‧‧Rotor holder
66a‧‧‧嵌合部 66a‧‧‧Mate
66b‧‧‧轉子突出部 66b‧‧‧Rotor protrusion
70‧‧‧定子 70‧‧‧ Stator
72‧‧‧連通通路 72‧‧‧Connected pathway
74‧‧‧第1滾珠軸承 74‧‧‧1st ball bearing
76‧‧‧第2滾珠軸承 76‧‧‧2nd ball bearing
78‧‧‧第3滾珠軸承 78‧‧‧3rd ball bearing
80‧‧‧第4滾珠軸承 80‧‧‧4th ball bearing
82‧‧‧第5滾珠軸承 82‧‧‧5th ball bearing
84‧‧‧第6滾珠軸承 84‧‧‧6th ball bearing
86‧‧‧傳達機構 86‧‧‧Communication agency
88‧‧‧行星齒輪軸 88‧‧‧ planetary gear shaft
89‧‧‧連接構件 89‧‧‧Connecting components
90‧‧‧通路 90‧‧‧ pathway
110‧‧‧車輪驅動裝置 110‧‧‧ Wheel drive
132‧‧‧單向離合器 132‧‧‧One-way clutch
134‧‧‧太陽齒輪 134‧‧‧Sun Gear
136‧‧‧行星齒輪 136‧‧‧ planetary gear
136a‧‧‧第1齒輪列 136a‧‧‧1st gear train
136b‧‧‧第2齒輪列 136b‧‧‧2nd gear train
182‧‧‧第7滾珠軸承 182‧‧‧7th ball bearing
184‧‧‧第8滾珠軸承 184‧‧‧8th ball bearing
188‧‧‧行星齒輪軸 188‧‧‧ planetary gear shaft
R‧‧‧旋轉軸 R‧‧‧Rotary axis
第1圖係為應用實施形態之車輪驅動裝置之車輛的車輪部份的放大圖。 Fig. 1 is an enlarged view of a wheel portion of a vehicle to which the wheel drive device of the embodiment is applied.
第2圖(a)及(b)係為實施形態之車輪驅動裝置的分解立體圖。 Fig. 2 (a) and (b) are exploded perspective views of the wheel drive device of the embodiment.
第3圖係為實施形態之車輪驅動裝置的剖面圖。 Fig. 3 is a cross-sectional view showing the wheel drive device of the embodiment.
第4圖係為以第3圖之虛線所圍繞之部分的放大圖。 Fig. 4 is an enlarged view of a portion surrounded by a broken line in Fig. 3.
第5圖係為變形例之車輪驅動裝置的剖面圖。 Fig. 5 is a cross-sectional view showing a wheel drive device according to a modification.
以下，對於各圖示所示相同或相等之構成要素、構件，標示相同的符號，並適當省略重複之說明。此外，各圖式中之構件的尺寸，係為了容易理解而適當地放大、縮小來顯示。此外，在各圖式中，在說明實施形態上非重要之構件之一部分係省略顯示。 In the following, the same or equivalent components and members are designated by the same reference numerals, and the description thereof will be omitted as appropriate. Further, the dimensions of the members in the respective drawings are appropriately enlarged and reduced for easy understanding. Further, in each of the drawings, a part of the member which is not important in the description of the embodiment is omitted.
實施形態之車輪驅動裝置，係為藉由馬達旋轉驅動車輛的車輪之內轂型的車輪驅動裝置。該車輪驅動裝置亦可使用作為使含有輔助的電動單輪車、自行車等之自動2輪車、3輪車、輪椅及/或車子等之4輪車的車輪進行旋轉的輪內馬達。 The wheel drive device according to the embodiment is a hub-type wheel drive device that drives a wheel of a vehicle by a motor. The wheel drive device can also be used as an in-wheel motor that rotates the wheels of a four-wheeled vehicle including an auxiliary electric motorcycle, an automatic two-wheeled vehicle such as a bicycle, a three-wheeled vehicle, a wheelchair, and/or a car.
實施形態之車輪驅動裝置係具備：定子(stator)和轉子(rotor)，用以藉由磁性的相互作用進行相對性之旋轉、以及傳達機構，用以將欲使轉子旋轉之轉矩(torque)從轉子傳達至輪轂。傳達機構係包含單向離合器，該單向離合器係配置在由傳達機構之其他齒輪等之構件所圍繞的位置。藉此，能夠減低車輪驅動裝置的旋轉軸方向的尺寸、亦即厚度。 The wheel drive device of the embodiment includes a stator and a rotor for relative rotation by magnetic interaction and a transmission mechanism for torque to rotate the rotor. Communicated from the rotor to the hub. The communication mechanism includes a one-way clutch that is disposed at a position surrounded by members of other gears or the like of the transmission mechanism. Thereby, the size, that is, the thickness of the wheel drive device in the direction of the rotation axis can be reduced.
第1圖係為應用實施形態之車輪驅動裝置10之車輛的車輪部 份之放大圖。車輪驅動裝置10係使車輪的輪轂12相對於軸20進行旋轉。軸20係藉由切削碳鋼而形成。在本實施形態中，車輪驅動裝置10雖包含輪轂12，惟在另一實施形態中亦可為不包含輪轂之車輪驅動裝置。在輪轂12的外周部固定有延伸成放射線狀之複數個輪輻(spoke)14的一端側。此外，輪輻14的另一端側係固定於支持輪胎部16的輪圈(rim)18。輪圈18係經介輪輻14與輪轂12結合而形成車輪的骨架。 Fig. 1 is a wheel portion of a vehicle to which the wheel drive device 10 of the embodiment is applied Magnified view of the share. The wheel drive device 10 rotates the hub 12 of the wheel relative to the shaft 20. The shaft 20 is formed by cutting carbon steel. In the present embodiment, the wheel drive device 10 includes the hub 12, but in another embodiment, it may be a wheel drive device that does not include a hub. One end side of a plurality of spokes 14 extending in a radial shape is fixed to the outer peripheral portion of the hub 12. Further, the other end side of the spoke 14 is fixed to a rim 18 that supports the tire portion 16. The rim 18 is coupled to the hub 12 via the intermediate spokes 14 to form the skeleton of the wheel.
軸20係沿著輪轂12的旋轉軸而朝輪轂12的兩側突出，該突出之部分係支持在屬於車輛之框架之部分的叉架(fork)22。藉此，包含輪轂12、輪輻14、輪胎部16、以及輪圈18的車輪係以軸20為中心旋轉。 The shaft 20 projects along the axis of rotation of the hub 12 toward both sides of the hub 12, the portion of which is supported by a fork 22 that is part of the frame of the vehicle. Thereby, the wheel including the hub 12, the spokes 14, the tire portion 16, and the rim 18 rotates around the shaft 20.
另外，在第1圖之例子中，雖顯示包含輪轂12、輪輻14、輪胎部16、以及輪圈18，即所謂的輻輪(spoke wheel)，惟亦可例如採用圓板來取代輪輻14，亦即可將本實施形態的技術性思想應用在所謂的輻板式車輪(disk wheel)。 Further, in the example of Fig. 1, although the hub 12, the spokes 14, the tire portion 16, and the rim 18, a so-called spoke wheel, are shown, it is also possible to use, for example, a circular plate instead of the spokes 14, The technical idea of the present embodiment can also be applied to a so-called disk wheel.
第2圖(a)、(b)係為車輪驅動裝置10的分解立體圖。第3圖係為車輪驅動裝置10的剖面圖。車輪驅動裝置10係具備：輪轂12、轉子30、傳達機構86、定子70、配線構件52、拉出配線54、3個行星齒輪軸88、以及行星齒輪固定構件60。 FIGS. 2(a) and 2(b) are exploded perspective views of the wheel drive device 10. Figure 3 is a cross-sectional view of the wheel drive unit 10. The wheel drive device 10 includes a hub 12, a rotor 30, a transmission mechanism 86, a stator 70, a wiring member 52, a pull-out wiring 54, three planetary gear shafts 88, and a planetary gear fixing member 60.
定子70係固定在軸20。定子70係含有：線圈(coil)40、鐵心(core)42、藉由將鋁鑄造所形成之第1殼體44、以及藉由將鋁鑄造所形成之第2殼體46。 The stator 70 is fixed to the shaft 20. The stator 70 includes a coil 40, a core 42, a first casing 44 formed by casting aluminum, and a second casing 46 formed by casting aluminum.
第1殼體44係為支持鐵心42之大致罩杯(cup)狀的構件。鐵心42係被支持在第1殼體44之行星齒輪群側(以下，從第1殼體 44觀看將行星齒輪群側為上側)之上表面44c上。在第1殼體44設置有以輪轂12之旋轉軸R為中心之軸孔44a。將軸20***在軸孔44a，且藉由壓入或黏著而被固定，藉此第1殼體44係對於軸20進行固定。 The first case 44 is a substantially cup-shaped member that supports the core 42. The core 42 is supported on the planetary gear group side of the first casing 44 (hereinafter, from the first casing) 44 views the side of the planetary gear set as the upper side) on the upper surface 44c. The first housing 44 is provided with a shaft hole 44a centering on the rotation axis R of the hub 12. The shaft 20 is inserted into the shaft hole 44a and fixed by press-fitting or adhesion, whereby the first housing 44 is fixed to the shaft 20.
鐵心42係藉由複數根螺絲固定在第1殼體44的外周側。鐵心42係藉由積層薄型之電磁鋼板所形成。鐵心42係具有圓環部、以及從圓環部朝半徑方向內側延伸之12個凸極42a。在鐵心42的各凸極42a捲繞有線圈40。藉由使交流的驅動電流流通在該線圈40，而沿著凸極42a產生磁通。 The core 42 is fixed to the outer peripheral side of the first casing 44 by a plurality of screws. The core 42 is formed by laminating thin electromagnetic steel sheets. The core 42 has an annular portion and twelve salient poles 42a extending inward in the radial direction from the annular portion. The coil 40 is wound around each salient pole 42a of the core 42. Magnetic flux is generated along the salient pole 42a by causing an alternating current drive current to flow through the coil 40.
第2殼體46係在沿著旋轉軸R之方向即軸方向挾持鐵心42，而與第1殼體44相對向。在第2殼體46之與線圈40相對應之位置形成有孔部48。孔部48係可貫穿或不貫穿第2殼體46。在第2圖中係顯示孔部48貫穿第2殼體46之情形。在孔部48進入有對應之線圈40的一部分。藉此，可減低定子70之軸方向的尺寸。此外，提升了定子70的散熱性。 The second casing 46 holds the core 42 in the axial direction along the rotation axis R, and faces the first casing 44. A hole portion 48 is formed at a position of the second casing 46 corresponding to the coil 40. The hole portion 48 may or may not penetrate the second housing 46. In the second drawing, the case where the hole portion 48 penetrates the second casing 46 is shown. A portion of the corresponding coil 40 is entered in the hole portion 48. Thereby, the dimension of the stator 70 in the axial direction can be reduced. In addition, the heat dissipation of the stator 70 is improved.
第2殼體46係以其外周側固著於第1殼體44。第1殼體44與第2殼體46的固著部分，係以限制第2殼體46朝相對於第1殼體44半徑方向移動之方式構成。具體而言，該固著部分係形成嵌入(inlay)部50。亦即，第1殼體44之第1外周壁部44b與第2殼體46的第2外周壁部46a係朝軸方向局部地彼此重疊。在該情形下，提升了在第2殼體46相對於第1殼體44在半徑方向的定位精確度，並且第2殼體46相對於第1殼體46不易偏移。 The second case 46 is fixed to the first case 44 on the outer peripheral side thereof. The fixing portion of the first case 44 and the second case 46 is configured to restrict the second case 46 from moving in the radial direction with respect to the first case 44. Specifically, the fixing portion forms an inlay portion 50. In other words, the first outer peripheral wall portion 44b of the first casing 44 and the second outer peripheral wall portion 46a of the second casing 46 partially overlap each other in the axial direction. In this case, the positioning accuracy in the radial direction of the second housing 46 with respect to the first housing 44 is improved, and the second housing 46 is less likely to be displaced from the first housing 46.
配線構件52係為以螺絲固定在第1殼體44之下面44d的印刷基板。配線構件52係具有霍爾(hall)元件52a，其係***於屬於 設置在第1殼體44之貫穿孔的霍爾元件孔44h，且朝第1殼體44之上側露出。霍爾元件52a係為檢測出磁鐵(magnet)62a的磁通(亦即，轉子30的位置)，而輸出用以決定驅動電流之通電時序(Timing)之位置檢測信號的元件。霍爾元件52a係經介配線構件52與拉出配線54連接，且通過拉出配線54將位置檢測信號輸出至外部。 The wiring member 52 is a printed circuit board that is screwed to the lower surface 44d of the first casing 44. The wiring member 52 has a hall element 52a which is inserted and belongs to The Hall element hole 44h provided in the through hole of the first case 44 is exposed to the upper side of the first case 44. The Hall element 52a is an element that detects the magnetic flux of the magnet 62a (that is, the position of the rotor 30) and outputs a position detection signal for determining the energization timing (Timing) of the drive current. The Hall element 52a is connected to the pull-out wiring 54 via the dielectric wiring member 52, and the position detection signal is output to the outside through the pull-out wiring 54.
線圈40的線圈端40a係通過屬於設置在第1殼體44之貫穿孔的導線孔44e與配線構件52連接。配線構件52係連接線圈端40a與拉出配線54之一端。通過拉出配線54從外部供給電力至線圈40。 The coil end 40a of the coil 40 is connected to the wiring member 52 via a wire hole 44e belonging to a through hole provided in the first case 44. The wiring member 52 is connected to one end of the coil end 40a and the pull-out wiring 54. Power is supplied from the outside to the coil 40 by the pull-out wiring 54.
在第1殼體44中，於比第2滾珠軸承76(後述)更朝半徑方向外側形成有第1貫穿孔44f。在第1殼體44之軸孔44a的周面形成有第2貫穿孔44g。在軸20的周面，形成有與第2貫穿孔44g對應亦即與第2貫穿孔連通的第2周面開口20b。在軸20之中從輪轂12朝下側突出之下突出部56的周面，形成有第1周面開口20a。第1周面開口20a與第2周面開口20b係藉由沿著旋轉軸R設置在軸20之軸中心孔20c而連通。 In the first case 44, the first through hole 44f is formed on the outer side in the radial direction from the second ball bearing 76 (described later). The second through hole 44g is formed in the circumferential surface of the shaft hole 44a of the first case 44. A second circumferential surface opening 20b that communicates with the second through hole 44g, that is, the second circumferential surface opening 20b is formed on the circumferential surface of the shaft 20. The first circumferential surface opening 20a is formed in the circumferential surface of the lower protruding portion 56 from the hub 12 toward the lower side of the shaft 20. The first circumferential surface opening 20a and the second circumferential surface opening 20b communicate with each other via a shaft center hole 20c provided in the shaft 20 along the rotation axis R.
軸中心孔20c係為從下突出部56之端面56a沿著旋轉軸R所形成之孔。亦即，下突出部56係至少局部地形成為中空。在該情形下，可將軸20輕量化，亦提升散熱性。軸20中之從輪轂12朝上側突出之上突出部57亦同樣地形成為中空。在該情形下，因軸20的兩端皆形成為中空，故能夠改善包含車輪驅動裝置10和軸20之單元的重量平衡。 The shaft center hole 20c is a hole formed along the rotation axis R from the end surface 56a of the lower protrusion 56. That is, the lower projection 56 is at least partially formed to be hollow. In this case, the shaft 20 can be lightened and the heat dissipation can be improved. The upper projection portion 57 of the shaft 20 projecting upward from the hub 12 is also formed to be hollow. In this case, since both ends of the shaft 20 are formed to be hollow, the weight balance of the unit including the wheel drive unit 10 and the shaft 20 can be improved.
第2周面開口20b、軸中心孔20c、以及第1周面開口20a，係構成形成在軸20的連通通路72。連通通路72係與第1殼體44 的上側與輪轂12的外部連通。 The second circumferential surface opening 20b, the shaft center hole 20c, and the first circumferential surface opening 20a constitute a communication passage 72 formed in the shaft 20. The communication passage 72 is connected to the first housing 44 The upper side is in communication with the outside of the hub 12.
拉出配線54係通過第1貫穿孔44f從第1殼體44之下側被拉出至上側，且通過第2貫穿孔44g而導入連通通路72。拉出配線54係通過連通通路72，從第1周面開口20a被拉出至輪轂12之外部。拉出配線54係以沿著叉架22之方式從第1周面開口20a被拉出。當叉架22形成為中空時，拉出配線54亦可從第1周面開口20a導入至叉架22的內側。在該情形下，可更加確實地保護拉出配線54，並且減低車輛的車寬度。另外，拉出配線54亦可不通過叉架22。 The pull-out wiring 54 is pulled out from the lower side of the first casing 44 to the upper side by the first through hole 44f, and is introduced into the communication passage 72 through the second through hole 44g. The pull-out wiring 54 is pulled out from the first circumferential surface opening 20a to the outside of the hub 12 through the communication passage 72. The pull-out wiring 54 is pulled out from the first circumferential surface opening 20a along the fork 22 . When the fork 22 is formed to be hollow, the pull-out wiring 54 may be introduced from the first circumferential surface opening 20a to the inner side of the fork 22. In this case, the pull-out wiring 54 can be more surely protected, and the vehicle width of the vehicle can be reduced. In addition, the pull-out wiring 54 may not pass through the fork 22.
轉子30係藉由與定子70的磁性相互作用而在軸20的周圍進行旋轉。轉子30係包含轉子鐵心62、10個磁鐵62a、以及轉子保持具66。軸20係貫穿轉子30，並旋轉自如地支持轉子30。 The rotor 30 rotates around the shaft 20 by magnetic interaction with the stator 70. The rotor 30 includes a rotor core 62, ten magnets 62a, and a rotor holder 66. The shaft 20 penetrates the rotor 30 and rotatably supports the rotor 30.
10個磁鐵62a係在轉子鐵心62中沿著圓周方向等間隔地被埋入。轉子鐵心62係藉由積層矽鋼板所形成，且與鐵心42之12個凸極42a朝半徑方向相對向。 The ten magnets 62a are embedded in the rotor core 62 at equal intervals in the circumferential direction. The rotor core 62 is formed of a laminated tantalum steel sheet and faces the twelve salient poles 42a of the core 42 in a radial direction.
轉子保持具66係為機械性連接轉子鐵心62與單向離合器32的構件。轉子保持具66係例如藉由碳鋼等之鋼鐵材料所形成。在轉子保持具66與軸20介設有第3滾珠軸承78，軸20經介第3滾珠軸承78旋轉自如地支持轉子保持具66。轉子保持具66係具有：嵌合部66a，用以嵌合並固定轉子鐵心62；以及轉子突出部66b，從嵌合部66a朝上側突出。嵌合部66a係在半徑方向被挾持在第3滾珠軸承78與轉子鐵心62。轉子突出部66b係隔著間隙環繞軸20。 The rotor holder 66 is a member that mechanically connects the rotor core 62 and the one-way clutch 32. The rotor holder 66 is formed, for example, of a steel material such as carbon steel. The third ball bearing 78 is interposed between the rotor holder 66 and the shaft 20, and the shaft 20 rotatably supports the rotor holder 66 via the third ball bearing 78. The rotor holder 66 has a fitting portion 66a for fitting and fixing the rotor core 62, and a rotor projecting portion 66b projecting upward from the fitting portion 66a. The fitting portion 66a is held by the third ball bearing 78 and the rotor core 62 in the radial direction. The rotor projection 66b surrounds the shaft 20 with a gap therebetween.
傳達機構86係將欲使轉子30旋轉之轉矩從轉子30傳達至輪 轂12。傳達機構86係包含：止輪墊式(sprag)或凸輪(cam)式的單向離合器32、太陽齒輪34、行星齒輪群、以及內齒輪38，該太陽齒輪34係藉由切削碳鋼所形成，該行星齒輪群係由藉由將樹脂射出成型所形成的3個行星齒輪所構成，而該內齒輪38係藉由將樹脂射出成型所形成。 The transmission mechanism 86 transmits the torque to rotate the rotor 30 from the rotor 30 to the wheel. Hub 12. The transmission mechanism 86 includes a sprag or cam type one-way clutch 32, a sun gear 34, a planetary gear set, and an internal gear 38 formed by cutting carbon steel. The planetary gear train is composed of three planetary gears formed by injection molding of a resin, and the internal gear 38 is formed by injection molding a resin.
單向離合器32係安裝在轉子突出部66b的外周面，且在比轉子突出部66b更靠上側處藉由例如平行銷(pin)33與太陽齒輪34結合。 The one-way clutch 32 is attached to the outer peripheral surface of the rotor projecting portion 66b, and is coupled to the sun gear 34 by, for example, a parallel pin 33 at an upper side than the rotor projecting portion 66b.
太陽齒輪34係經介單向離合器32承受轉子30的旋轉，並在軸20的周圍進行旋轉。太陽齒輪34係為隔著間隙環繞於軸20的外齒輪。亦即，軸20係貫穿太陽齒輪34，並旋轉自如地支持太陽齒輪34。太陽齒輪34係經介第4滾珠軸承80而旋轉自如地安裝在行星齒輪固定構件60。 The sun gear 34 receives the rotation of the rotor 30 via the one-way clutch 32 and rotates around the shaft 20. The sun gear 34 is an external gear that surrounds the shaft 20 with a gap therebetween. That is, the shaft 20 penetrates the sun gear 34 and rotatably supports the sun gear 34. The sun gear 34 is rotatably attached to the planetary gear fixing member 60 via the fourth ball bearing 80.
行星齒輪36係與太陽齒輪34咬合。行星齒輪36係具有第1齒輪列36a、以及節圓直徑(piech circle diameter)與第1齒輪列36a不同的第2齒輪列36b。第1齒輪列36a與第2齒輪列36b係實質上設置於同軸。第1齒輪列36a係與太陽齒輪34咬合，第2齒輪列與內齒輪38咬合。第1齒輪列36a與第2齒輪列36b係一體地形成，並同時地進行旋轉。 The planet gears 36 are engaged with the sun gear 34. The planetary gear 36 has a first gear train 36a and a second gear train 36b having a different piech circle diameter and a first gear train 36a. The first gear row 36a and the second gear row 36b are substantially coaxially disposed. The first gear train 36a is engaged with the sun gear 34, and the second gear train meshes with the internal gear 38. The first gear row 36a and the second gear row 36b are integrally formed and rotated simultaneously.
因太陽齒輪34的節圓直徑係比內齒輪38小，且太陽齒輪34係設置在比內齒輪38在軸方向更靠上側，故第1齒輪列36a的節圓直徑係比第2齒輪列36b的節圓直徑大，且第1齒輪列36a係設置在比第2齒輪列36b軸方向更靠上側。 Since the pitch diameter of the sun gear 34 is smaller than that of the internal gear 38, and the sun gear 34 is disposed above the internal gear 38 in the axial direction, the pitch diameter of the first gear train 36a is smaller than that of the second gear train 36b. The pitch circle diameter is large, and the first gear row 36a is provided above the axial direction of the second gear train 36b.
行星齒輪軸88係經介互相朝軸方向分離設置的第5滾珠軸承 82和第6滾珠軸承84而旋轉自如地支持行星齒輪36。行星齒輪軸88的下端係安裝在第2殼體46，上端係安裝在行星齒輪固定構件60。在該情形下，行星齒輪軸88因在兩端被支持，故耐衝擊性會提升。此外，行星齒輪固定構件60係與軸20一體地形成。在該情形下，行星齒輪36之安裝的精確度會提升。 The planetary gear shaft 88 is a fifth ball bearing that is separated from each other in the axial direction. The 82 and the sixth ball bearing 84 rotatably support the planetary gear 36. The lower end of the planetary gear shaft 88 is attached to the second housing 46, and the upper end is attached to the planetary gear fixing member 60. In this case, since the planetary gear shaft 88 is supported at both ends, the impact resistance is improved. Further, the planetary gear fixing member 60 is integrally formed with the shaft 20. In this case, the accuracy of the installation of the planetary gears 36 is improved.
行星齒輪軸88係安裝於相對於第2殼體46避開孔部48之位置，亦即安裝於以轉子30之旋轉軸R為基準且在角度方向鄰接圓周方向之線圈40的中間線上。 The planetary gear shaft 88 is attached to the second housing 46 at a position avoiding the hole 48, that is, attached to the intermediate line of the coil 40 which is adjacent to the circumferential direction in the angular direction with respect to the rotation axis R of the rotor 30.
行星齒輪固定構件60與第2殼體46之間，係在鄰接圓周方向之行星齒輪軸88的中間線上的3部位，安裝有連接行星齒輪固定構件60與第2殼體46的連接構件89。連接構件89係與行星齒輪軸88同樣地，安裝在相對於第2殼體46避開孔部48之位置，亦即安裝在以轉子30之旋轉軸R為基準且在角度方向鄰接圓周方向之線圈40的中間線上。在該情形下，藉由連接構件89機械性地結合行星齒輪固定構件60與第2殼體46，即可使傳達機構86之強度與精確度提升。 Between the planetary gear fixing member 60 and the second casing 46, a connecting member 89 that connects the planetary gear fixing member 60 and the second casing 46 is attached to three places on the intermediate line of the planetary gear shaft 88 adjacent to the circumferential direction. Similarly to the planetary gear shaft 88, the connecting member 89 is attached to the second housing 46 at a position avoiding the hole 48, that is, attached to the rotation axis R of the rotor 30 and adjacent to the circumferential direction in the angular direction. The middle line of the coil 40. In this case, the strength and accuracy of the communication mechanism 86 can be improved by mechanically coupling the planetary gear fixing member 60 and the second housing 46 by the connecting member 89.
內齒輪38係藉由螺絲固定在藉由將鋁鑄造所形成之殼體(housing)24的內周側。 The internal gear 38 is fixed to the inner peripheral side of a housing 24 formed by casting aluminum by screws.
傳達機構86之各構件並非朝軸方向串聯地排列，而是以即使略朝半徑方向擴展亦儘量朝軸方向並聯配置之方式構成。整理傳達機構86之各構件的位置關係如下述。 The members of the transmission mechanism 86 are not arranged in series in the axial direction, but are configured to be arranged in parallel in the axial direction as much as possible even if they are slightly expanded in the radial direction. The positional relationship of the components of the finishing conveyance mechanism 86 is as follows.
(1)單向離合器32係以至少在軸方向與行星齒輪群和內齒輪38局部地重複之方式配置。具體而言，單向離合器32係以包圍在行星齒輪群之方式配置，且以環繞於內齒輪38之方式配置。單 向離合器32之外周面與第2齒輪列36b係在半徑方向相對向。換言之，沿著旋轉軸R定義座標時，單向離合器32所對應之座標範圍與行星齒輪36所對應之座標範圍係具有共通部分。 (1) The one-way clutch 32 is disposed to partially overlap the planetary gear group and the internal gear 38 at least in the axial direction. Specifically, the one-way clutch 32 is disposed so as to surround the planetary gear group, and is disposed to surround the internal gear 38. single The outer circumferential surface of the clutch 32 is opposed to the second gear train 36b in the radial direction. In other words, when the coordinates are defined along the rotation axis R, the coordinate range corresponding to the one-way clutch 32 has a common portion with the coordinate range corresponding to the planetary gear 36.
(2)內齒輪38係在軸方向中比太陽齒輪34更靠近定子70側之處固定於殼體24。定子70係因內包鐵心42及線圈40，故在車輪驅動裝置10中具有比較大的軸方向之尺寸。因此，藉由將內齒輪38在靠近定子70之位置固定在殼體24，從而可將該固定位置接近於輪轂12之軸方向中央。藉此，輪轂12之旋轉的平衡會提升。 (2) The internal gear 38 is fixed to the casing 24 at a position closer to the stator 70 than the sun gear 34 in the axial direction. Since the stator 70 is surrounded by the core 42 and the coil 40, the wheel drive device 10 has a relatively large axial dimension. Therefore, by fixing the internal gear 38 to the casing 24 at a position close to the stator 70, the fixed position can be brought close to the center of the hub 12 in the axial direction. Thereby, the balance of the rotation of the hub 12 is increased.
輪轂12係包含第1罩殼(cover)部26、第2罩殼部28、以及圓筒狀的殼體24，該第1罩殼部26係經介第1滾珠軸承74旋轉自如地安裝在軸20，該第2罩殼部28係經介第2滾珠軸承76旋轉自如地安裝在軸20，而該圓筒狀的殼體24係以軸方向設置在第1罩殼部26與第2罩殼部28之間，並機械性地結合第1罩殼部26與第2罩殼部28。第1罩殼部26與第2罩殼部28係具有大致相同的形狀，且均藉由將鋁鑄造、或者藉由切削碳鋼所形成。在該情形下，因可使用相同的製造步驟來生產第1罩殼部26和第2罩殼部28，故車輪驅動裝置10的製造效率會提升。 The hub 12 includes a first cover portion 26, a second cover portion 28, and a cylindrical casing 24, and the first cover portion 26 is rotatably attached via the first ball bearing 74. In the shaft 20, the second casing portion 28 is rotatably attached to the shaft 20 via the second ball bearing 76, and the cylindrical casing 24 is provided in the first casing portion 26 and the second portion in the axial direction. The first cover portion 26 and the second cover portion 28 are mechanically coupled between the cover portions 28. The first cover portion 26 and the second cover portion 28 have substantially the same shape, and are formed by casting aluminum or by cutting carbon steel. In this case, since the first cover portion 26 and the second cover portion 28 can be produced using the same manufacturing steps, the manufacturing efficiency of the wheel drive device 10 is improved.
第1罩殼部26、第2罩殼部28係均以外周側螺合在殼體24。在第1罩殼部26與殼體24的螺合部64中，於第1罩殼部26的外緣側形成有外螺紋，而在殼體24之上端的內周側形成有內螺紋。將第1罩殼部26螺合在殼體24時，藉由使第1罩殼部26整體相對於殼體24進行旋轉，而螺合第1罩殼部26與殼體24。針對第2罩殼部28與殼體24的螺合部64亦同。藉此，與例如使用其他螺絲固定罩殼部與殼體之情形相較，車輪驅動裝置10之外觀 會變得美觀，並可減低案件數量和製造步驟數。 Each of the first cover portion 26 and the second cover portion 28 is screwed to the casing 24 on the outer peripheral side. In the screw portion 64 of the first cover portion 26 and the casing 24, an external thread is formed on the outer edge side of the first cover portion 26, and an internal thread is formed on the inner peripheral side of the upper end of the casing 24. When the first cover portion 26 is screwed to the casing 24, the first cover portion 26 and the casing 24 are screwed together by rotating the entire first casing portion 26 with respect to the casing 24. The same applies to the screwing portion 64 of the second cover portion 28 and the casing 24. Thereby, the appearance of the wheel drive device 10 is compared with the case where the cover portion and the case are fixed using, for example, other screws. It will become beautiful and reduce the number of cases and the number of manufacturing steps.
第4圖係為以第3圖之虛線所圍繞之部分的放大圖。在第2罩殼部28與殼體24的接合部分施加防水處理。在殼體24的接合面24a和第2罩殼28的接合面28b的兩方沿著圓周方向設置凹部，亦即設置溝部。具體而言，凹部係形成為以旋轉軸R為中心的環狀。藉由將第2罩殼部28螺合在殼體24，當殼體24的接合面24a與第2罩殼部28的接合面28a接觸時，設置在兩方之接合面的凹部即相互重疊而形成通路90。在通路90中存在有密封材。密封材係例如為橡皮襯墊或黏著劑。針對第1罩殼部26與殼體24的接合部分亦同。 Fig. 4 is an enlarged view of a portion surrounded by a broken line in Fig. 3. A water repellent treatment is applied to the joint portion of the second cover portion 28 and the casing 24. A recess is provided in both the circumferential direction of the joint surface 24a of the casing 24 and the joint surface 28b of the second casing 28, that is, a groove is provided. Specifically, the concave portion is formed in a ring shape centering on the rotation axis R. When the second cover portion 28 is screwed to the casing 24, when the joint surface 24a of the casing 24 comes into contact with the joint surface 28a of the second casing portion 28, the recesses provided on the joint faces of the two sides overlap each other. The via 90 is formed. A sealing material is present in the passage 90. The sealing material is, for example, a rubber liner or an adhesive. The same applies to the joint portion of the first cover portion 26 and the casing 24.
將如以上所述構成之車輪驅動裝置10之動作加以說明。通過拉出配線54將3相驅動電流供給至線圈40。藉由該驅動電流流通線圈40，沿著12個凸極42a產生磁通。藉由該磁通對磁鐵62a提供轉矩。傳達機構86係將欲使轉子30旋轉之轉矩從轉子30傳達至輪轂12。藉此，使車輪相對於軸20進行旋轉。 The operation of the wheel drive device 10 configured as described above will be described. The 3-phase drive current is supplied to the coil 40 by the pull-out wiring 54. Magnetic flux is generated along the twelve salient poles 42a by the drive current passing coil 40. The magnet 62a is supplied with torque by the magnetic flux. The transmission mechanism 86 transmits the torque to rotate the rotor 30 from the rotor 30 to the hub 12. Thereby, the wheel is rotated relative to the shaft 20.
根據本實施形態之車輪驅動裝置10，單向離合器32因以至少在軸方向與行星齒輪群局部地重複之方式配置，故即可將車輪驅動裝置10朝軸方向薄化達單向離合器32與行星齒輪群重複之量。藉此，可抑制因在車輛搭載車輪驅動裝置10而造成車輛的車寬度之增大。 According to the wheel drive device 10 of the present embodiment, since the one-way clutch 32 is disposed so as to partially overlap the planetary gear group at least in the axial direction, the wheel drive device 10 can be thinned in the axial direction to the one-way clutch 32 and The amount of planetary gears is repeated. Thereby, it is possible to suppress an increase in the vehicle width of the vehicle caused by the wheel drive device 10 being mounted on the vehicle.
此外，在本實施形態的車輪驅動裝置10中，單向離合器32因以在軸方向至少與內齒輪38局部地重複之方式配置，故基於同樣的理由，可將車輪驅動裝置10朝軸方向薄化。 Further, in the wheel drive device 10 of the present embodiment, since the one-way clutch 32 is disposed at least partially overlapping the internal gear 38 in the axial direction, the wheel drive device 10 can be thinned toward the axial direction for the same reason. Chemical.
此外，在本實施形態的車輪驅動裝置10中，傳達機構86係 以將轉子30的旋轉減速而傳達至輪轂12之方式構成。 Further, in the wheel drive device 10 of the present embodiment, the transmission mechanism 86 is It is configured to reduce the rotation of the rotor 30 and transmit it to the hub 12.
在旋轉驅動中的工作效率，一般以2 π×(旋轉數)×(轉矩)(W)表示。因此，當忽略損失時，正常旋轉時，由能量不滅定律在傳達機構86之任一個部位，旋轉數與轉矩的乘積皆為一定。因此，在傳達機構86中，轉子側係形成高速旋轉/低轉矩，而輪轂側係形成低速旋轉/高轉矩。在一例中，傳達機構86係將轉子30的旋轉數減速成1/15，而使輪轂12進行旋轉。在該情形下，輪轂12的轉矩係成為轉子30之轉矩的15倍。 The work efficiency in the rotational drive is generally expressed by 2 π × (number of revolutions) × (torque) (W). Therefore, when the loss is neglected, in the normal rotation, the product of the number of revolutions and the torque is constant at any portion of the communication mechanism 86 by the law of energy immortality. Therefore, in the transmission mechanism 86, the rotor side forms a high speed rotation/low torque, and the hub side forms a low speed rotation/high torque. In one example, the transmission mechanism 86 decelerates the number of rotations of the rotor 30 to 1/15, and rotates the hub 12. In this case, the torque of the hub 12 is 15 times the torque of the rotor 30.
因此，在本實施形態之車輪驅動裝置10中，傳達機構86係在轉子30側、亦即在離轉子30之附近處具有單向離合器32。具體而言，在傳達機構86中，單向離合器32係配置在比太陽齒輪34更靠近轉子30之位置。藉此，減低在正常運轉時施加在單向離合器32的轉矩，且可延長單向離合器的壽命。或者，因可使用較比容許轉距更小之小型的單向離合器，故有助於車輪驅動裝置10之軸方向的尺寸減小。 Therefore, in the wheel drive device 10 of the present embodiment, the transmission mechanism 86 has the one-way clutch 32 on the side of the rotor 30, that is, in the vicinity of the rotor 30. Specifically, in the transmission mechanism 86, the one-way clutch 32 is disposed closer to the rotor 30 than the sun gear 34. Thereby, the torque applied to the one-way clutch 32 during normal operation is reduced, and the life of the one-way clutch can be extended. Alternatively, since a small one-way clutch that is smaller than the allowable torque can be used, the size of the wheel drive device 10 in the axial direction is reduced.
此外，在轉矩之傳達的路徑中，在將單向離合器設置在比行星齒輪群更靠近輪轂側的情形下，以在軸方向與行星齒輪群重疊之方式配置單向離合器時，使車輪驅動裝置之直徑變大達單向離合器之份。因此，在本實施形態之車輪驅動裝置10中，單向離合器32係設置在轉子30側。因此，可將單向離合器32收納在藉由第1齒輪列36a、第2齒輪列36b、以及定子70所包圍之空間。結果，可抑制以在軸方向與行星齒輪群重疊之方式配置單向離合器32時之車輪驅動裝置10之直徑的增大，而能夠更小型化之配置。 Further, in the path of the torque transmission, when the one-way clutch is disposed closer to the hub side than the planetary gear group, the wheel drive is performed when the one-way clutch is disposed so as to overlap the planetary gear group in the axial direction. The diameter of the device becomes larger than the one-way clutch. Therefore, in the wheel drive device 10 of the present embodiment, the one-way clutch 32 is provided on the rotor 30 side. Therefore, the one-way clutch 32 can be housed in the space surrounded by the first gear train 36a, the second gear train 36b, and the stator 70. As a result, it is possible to suppress an increase in the diameter of the wheel drive device 10 when the one-way clutch 32 is disposed so as to overlap the planetary gear group in the axial direction, and it is possible to further reduce the size.
此外，在本實施形態之車輪動裝置10中，拉出配線54係以 避開第2滾珠軸承76與第1殼體44之間之方式進行配線。藉此，因可於軸方向使第1殼體44與第2滾珠軸承76更接近地進行配置，故可減小車輪驅動裝置10之軸方向的尺寸。 Further, in the wheel moving device 10 of the present embodiment, the pull-out wiring 54 is Wiring is performed so as to avoid the relationship between the second ball bearing 76 and the first casing 44. Thereby, since the first housing 44 and the second ball bearing 76 can be disposed closer to each other in the axial direction, the dimension of the wheel drive device 10 in the axial direction can be reduced.
以上，針對實施形態之車輪驅動裝置10之構成與動作加以說明。該實施形態係為例示，在實施形態之各構成要素之組合中可有各種的變形例，且這樣的變形例亦在本發明的範圍，係為熟習該項技術者所能理解者。 The configuration and operation of the wheel drive device 10 of the embodiment will be described above. This embodiment is exemplified, and various modifications are possible in combination of the constituent elements of the embodiment, and such modifications are also within the scope of the invention and can be understood by those skilled in the art.
在實施形態中，雖針對內齒輪38與殼體24為不同體之情形加以說明，惟不侷限於此，亦可將內齒輪38與殼體24一體地形成。 In the embodiment, the case where the internal gear 38 and the casing 24 are different from each other will be described. However, the present invention is not limited thereto, and the internal gear 38 may be integrally formed with the casing 24.
在實施形態中，雖針對車輪驅動裝置10具備第2殼體46之情形加以說明，惟不侷限於此，車輪驅動裝置10亦可不具備第2殼體46。 In the embodiment, the case where the wheel drive device 10 includes the second casing 46 will be described. However, the wheel drive device 10 does not have to include the second casing 46.
在實施形態中，雖針對上突出部57至少局部地形成為中空之情形加以說明，惟不侷限於此，在上突出部亦可不設置軸中心孔。 In the embodiment, the upper protruding portion 57 is described as being at least partially hollow. However, the present invention is not limited thereto, and the axial center hole may not be provided in the upper protruding portion.
在實施形態中，雖針對車輪驅動裝置10具備單向離合器32之情形加以說明，惟不侷限於此，車輪驅動裝置10亦可不具備單向離合器32。 In the embodiment, the case where the wheel drive device 10 includes the one-way clutch 32 will be described. However, the present invention is not limited thereto, and the wheel drive device 10 may not include the one-way clutch 32.
在實施形態中，雖針對單向離合器32設置在轉子30與太陽齒輪34之間之情形加以說明，惟不侷限於此，例如，單向離合器亦可設置在行星齒輪內。 In the embodiment, the case where the one-way clutch 32 is provided between the rotor 30 and the sun gear 34 will be described, but the present invention is not limited thereto. For example, the one-way clutch may be provided in the planetary gear.
第5圖係為變形例之車輪驅動裝置110的剖面圖。車輪驅動裝置110係具備輪轂12、轉子30、傳達機構、定子70、配線構件52、拉出配線54、3個行星齒輪軸188、以及行星齒輪固定構件 60。 Fig. 5 is a cross-sectional view showing a wheel drive unit 110 according to a modification. The wheel drive device 110 includes a hub 12, a rotor 30, a transmission mechanism, a stator 70, a wiring member 52, a pull-out wiring 54, three planetary gear shafts 188, and a planetary gear fixing member. 60.
傳達機構係包含太陽齒輪134、由3個行星齒輪136所構成之行星齒輪群、以及內齒輪38。 The transmission mechanism includes a sun gear 134, a planetary gear group composed of three planetary gears 136, and an internal gear 38.
太陽齒輪134係安裝在轉子突出部66b，並與轉子突出部66b一同在軸20之周圍進行旋轉。行星齒輪136係包含第1齒輪列136a、第2齒輪列136b、以及單向離合器132。第1齒輪列136a係與太陽齒輪134咬合。第1齒輪列136a係對於行星齒輪軸188進行固定，並與行星齒輪軸188一同進行旋轉。行星齒輪軸188的下端係經介第8滾珠軸承184旋轉自如地安裝在第2殼體46，行星齒輪軸188的上端係經介第7滾珠軸承182旋轉自如地安裝在行星齒輪固定構件60。 The sun gear 134 is attached to the rotor projection 66b and rotates around the shaft 20 together with the rotor projection 66b. The planetary gear 136 includes a first gear train 136a, a second gear train 136b, and a one-way clutch 132. The first gear train 136a is engaged with the sun gear 134. The first gear train 136a is fixed to the planetary gear shaft 188 and rotates together with the planetary gear shaft 188. The lower end of the planetary gear shaft 188 is rotatably attached to the second casing 46 via the eighth ball bearing 184, and the upper end of the planetary gear shaft 188 is rotatably attached to the planetary gear fixing member 60 via the seventh ball bearing 182.
單向離合器132係在第1齒輪列136a之下方環繞於行星齒輪軸188，並將行星齒輪軸188之旋轉傳達至第2齒輪列136b。第2齒輪列136b係與內齒輪38咬合。 The one-way clutch 132 surrounds the planetary gear shaft 188 below the first gear train 136a, and transmits the rotation of the planetary gear shaft 188 to the second gear train 136b. The second gear train 136b is engaged with the internal gear 38.
根據本變形例，與實施形態同樣地可減小車輪驅動裝置110之軸方向的尺寸。 According to the present modification, the size of the wheel drive device 110 in the axial direction can be reduced similarly to the embodiment.
實施形態之技術性思想，亦可根據以下項目所界定。 The technical idea of the embodiment can also be defined according to the following items.
一種車輪驅動裝置10，係具備：軸20，沿著車輪之輪轂12的旋轉軸R而貫穿前述輪轂12；定子70，固定在前述軸20；轉子30，藉由與前述定子70的磁性相互作用在前述軸20之周圍進行旋轉；以及傳達機構86，將欲使前述轉子30旋轉之轉矩從前述轉子30 A wheel drive device 10 includes a shaft 20 that penetrates the hub 12 along a rotation axis R of a hub 12 of a wheel, a stator 70 that is fixed to the shaft 20, and a rotor 30 that interacts with the stator 70. Rotating around the shaft 20; and a transmission mechanism 86 for torque to rotate the rotor 30 from the rotor 30
傳達至前述輪轂12；其中前述定子70、前述轉子30及前述傳達機構86係包圍在前述前述輪轂12，並且從前述輪轂12突出之前述軸20的2個突出部分56、57係互相連結在前述輪轂12的內部。 Transmitting to the hub 12; wherein the stator 70, the rotor 30, and the transmission mechanism 86 are surrounded by the hub 12, and the two protruding portions 56, 57 of the shaft 20 protruding from the hub 12 are coupled to each other The interior of the hub 12.
如項目1所述之車輪驅動裝置10，其中，連結前述2個突出部分56、57的連結部分59係與前述2個突出部分56、57中至少一個56一體地形成。 The wheel drive device 10 according to item 1, wherein the joint portion 59 connecting the two projecting portions 56, 57 is integrally formed with at least one of the two projecting portions 56, 57.
根據項目1、項目2所述之車輪驅動裝置10，藉由連結部分59在旋轉軸R上直接連結下突出部56與上突出部57，藉此可使下突出部56與上突出部57的同軸精確度提升。換言之，可抑制起因於輪轂12旋轉時之同軸性能所造成之振動，並且亦可抑制伴隨振動之異聲及/或噪音之產生。此外，藉由連結部分59直接連結下突出部56與上突出部57，藉此與將下突出部56與上突出部57構成為1根軸的情形等效，而可提升作為軸整體的軸剛性。結果，能夠抑制起因於車輛本身重量及/或搭載重量之構件的變形，並且維持同軸精確度，而可有助於振動、異聲、噪音之抑制。下突出部56和上突出部57與連結部分59的接合，係能夠利用壓入、焊接、黏著等，可單獨利用或組合利用壓入、焊接、黏著等。此外，只要在連接下突出部56、上突出部57、連接部分59時之同軸精確度的容許範圍內，亦可將下突出部56和上突出部57與連接部分59藉由轉動配合(runningfit)接合。在該情形下，維護時的分解變得容易而可提升作業性。 According to the wheel drive device 10 described in the items 1 and 2, the lower projection portion 56 and the upper projection portion 57 are directly coupled to the rotation shaft R by the joint portion 59, whereby the lower projection portion 56 and the upper projection portion 57 can be made. Coaxial accuracy is improved. In other words, the vibration caused by the coaxial performance when the hub 12 is rotated can be suppressed, and the occurrence of the noise and/or noise accompanying the vibration can be suppressed. Further, the lower protruding portion 56 and the upper protruding portion 57 are directly coupled by the connecting portion 59, thereby equivalent to the case where the lower protruding portion 56 and the upper protruding portion 57 are formed as one axis, and the shaft as the entire shaft can be raised. rigidity. As a result, deformation of the member due to the weight of the vehicle itself and/or the weight of the vehicle can be suppressed, and the coaxial accuracy can be maintained, which can contribute to suppression of vibration, noise, and noise. The joining of the lower protruding portion 56 and the upper protruding portion 57 to the connecting portion 59 can be performed by press fitting, welding, adhesion, or the like, and press-fitting, welding, adhesion, or the like can be used alone or in combination. Further, as long as the coaxial precision of the lower projection 56, the upper projection 57, and the connecting portion 59 is allowed to be connected, the lower projection 56 and the upper projection 57 and the connecting portion 59 can also be rotated and fitted (runningfit) ) Engagement. In this case, the decomposition at the time of maintenance becomes easy and the workability can be improved.
10‧‧‧車輪驅動裝置 10‧‧‧ Wheel drive
12‧‧‧輪轂 12‧‧·wheels
20‧‧‧軸 20‧‧‧Axis
20a‧‧‧第1周面開口 20a‧‧‧ Opening of the first week
20b‧‧‧第2周面開口 20b‧‧‧Opening on the 2nd week
20c‧‧‧軸中心孔 20c‧‧‧Axis center hole
24‧‧‧殼體 24‧‧‧Shell
26‧‧‧第1罩殼部 26‧‧‧1st cover
28‧‧‧第2罩殼部 28‧‧‧2nd cover
30‧‧‧轉子 30‧‧‧Rotor
32‧‧‧單向離合器 32‧‧‧One-way clutch
33‧‧‧平行銷 33‧‧‧ parallel sales
34‧‧‧太陽齒輪 34‧‧‧Sun Gear
36‧‧‧行星齒輪 36‧‧‧ planetary gears
36a‧‧‧第1齒輪列 36a‧‧‧1st gear train
36b‧‧‧第2齒輪列 36b‧‧‧2nd gear train
38‧‧‧內齒輪 38‧‧‧Internal gear
40‧‧‧線圈 40‧‧‧ coil
42‧‧‧鐵心 42‧‧‧ iron core
40a‧‧‧線圈端 40a‧‧‧ coil end
44‧‧‧第1殼體 44‧‧‧1st housing
44a‧‧‧軸孔 44a‧‧‧Axis hole
44b‧‧‧第1外周壁部 44b‧‧‧1st outer peripheral wall
44c‧‧‧行星齒輪群側之上表面 44c‧‧‧Top surface of the planetary gear group side
44d‧‧‧第1殼體44之下面 44d‧‧‧ below the first housing 44
44e‧‧‧導線孔 44e‧‧‧Wire hole
44f‧‧‧第1貫穿孔 44f‧‧‧1st through hole
44g‧‧‧第2貫穿孔 44g‧‧‧2nd through hole
44h‧‧‧霍爾元件孔 44h‧‧‧ Hall element hole
46‧‧‧第2殼體 46‧‧‧ second housing
46a‧‧‧第2外周壁部 46a‧‧‧2nd outer peripheral wall
48‧‧‧孔部 48‧‧‧ Hole Department
50‧‧‧嵌入部 50‧‧‧ embedded department
52‧‧‧配線構件 52‧‧‧Wiring components
52a‧‧‧霍爾元件 52a‧‧‧ Hall element
54‧‧‧拉出配線 54‧‧‧ Pull out the wiring
56‧‧‧下突出部 56‧‧‧ under the protrusion
57‧‧‧上突出部 57‧‧‧Upper protrusion
59‧‧‧連結部分 59‧‧‧Link section
60‧‧‧行星齒輪固定構件 60‧‧‧ planetary gear fixing members
62‧‧‧鐵心 62‧‧‧ iron core
62a‧‧‧磁鐵 62a‧‧‧ Magnet
64‧‧‧螺合部 64‧‧‧ screwing department
66‧‧‧轉子保持具 66‧‧‧Rotor holder
66a‧‧‧嵌合部 66a‧‧‧Mate
66b‧‧‧轉子突出部 66b‧‧‧Rotor protrusion
70‧‧‧定子 70‧‧‧ Stator
72‧‧‧連通通路 72‧‧‧Connected pathway
74‧‧‧第1滾珠軸承 74‧‧‧1st ball bearing
76‧‧‧第2滾珠軸承 76‧‧‧2nd ball bearing
78‧‧‧第3滾珠軸承 78‧‧‧3rd ball bearing
80‧‧‧第4滾珠軸承 80‧‧‧4th ball bearing
82‧‧‧第5滾珠軸承 82‧‧‧5th ball bearing
84‧‧‧第6滾珠軸承 84‧‧‧6th ball bearing
88‧‧‧行星齒輪軸 88‧‧‧ planetary gear shaft
89‧‧‧連接構件 89‧‧‧Connecting components
R‧‧‧旋轉軸 R‧‧‧Rotary axis
Claims (8)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012030182A JP2013166437A (en) | 2012-02-15 | 2012-02-15 | Wheel drive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW201332834A true TW201332834A (en) | 2013-08-16 |
Family
ID=49177235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW101135256A TW201332834A (en) | 2012-02-15 | 2012-09-26 | Wheel driving apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2013166437A (en) |
| TW (1) | TW201332834A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITVI20130223A1 (en) * | 2013-09-07 | 2015-03-08 | Sergio Capraro | POWER GENERATOR UNIT WITH DIRECT ROLLER INTEGRATED TRANSMISSION |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220006359A1 (en) * | 2018-10-23 | 2022-01-06 | Sony Corporation | In-wheel motor and electric wheel |
| WO2020181519A1 (en) * | 2019-03-13 | 2020-09-17 | 舍弗勒技术股份两合公司 | In-wheel drive system and motor vehicle |
| JP7281688B2 (en) * | 2019-03-28 | 2023-05-26 | ニデック株式会社 | drive |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6100615A (en) * | 1998-05-11 | 2000-08-08 | Birkestrand; Orville J. | Modular motorized electric wheel hub assembly for bicycles and the like |
| JP2002362467A (en) * | 1998-05-29 | 2002-12-18 | Sanyo Electric Co Ltd | Electric car |
| JP5544949B2 (en) * | 2010-03-15 | 2014-07-09 | 日産自動車株式会社 | Variable speed transmission unit |
-
2012
- 2012-02-15 JP JP2012030182A patent/JP2013166437A/en active Pending
- 2012-09-26 TW TW101135256A patent/TW201332834A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITVI20130223A1 (en) * | 2013-09-07 | 2015-03-08 | Sergio Capraro | POWER GENERATOR UNIT WITH DIRECT ROLLER INTEGRATED TRANSMISSION |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013166437A (en) | 2013-08-29 |
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