CN103185125B - Geared system - Google Patents

Abstract

The invention provides a kind of geared system, its torque of allowing that can not reduce geared system just can realize densification, the lighting of this geared system entirety. Geared system of the present invention (12), it has power shaft (14) and output shaft (16), and the lower surface of mounting casing (18) and using, wherein, the upper surface (30) of the shell (18) (upper case (26)) of this geared system (12) is from the line tilt towards power shaft (14) side of output shaft (16) side, and possesses the outstanding rib (141～143) of upper surface (30) than this lower line tilt in a part for the upper surface (30) of this lower line tilt.

Description

Geared system

Technical field

The present invention relates to a kind of geared system.

Background technology

In patent documentation 1, disclose the geared system that is installed on the lower surface of shell and use.

This geared system has power shaft and output shaft, and the lower surface of shell is used as to installed surface, is used inThe very large-scale drive units such as such as bridge crane. In this patent documentation 1 in disclosed geared system,Because be large-scale, so being configured between the divisional plane by splitting shell by 2, guarantees fetching on its shellThe space that can hold gear mechanism these 2 inside of splitting shell. Be roughly as geared system entiretyThe shape of cuboid.

Patent documentation 1: TOHKEMY 2002-21986 communique

The geared system of this lower surface mount type has very large weight mostly, is manufacturing, assembles, is removingThere is the problem of operating difficulties and so in all aspects such as fortune, installation.

Summary of the invention

The present invention completes in order to address this is that a little, its problem be to provide one both maintained withToward identical or than in the past higher intensity, compacter and lightweight and operate geared system easily again.

The present invention is by solving as follows above-mentioned problem: a kind of geared system, and it has power shaft and output shaft,And the lower surface of mounting casing uses, wherein, the upper surface of the shell of this geared system is from output shaftSide line tilt under power shaft side, and possess than this in a part for the above-mentioned upper surface of this lower line tiltThe rib that upper surface is outstanding.

In geared system of the present invention, the upper surface of outer cover of this geared system from output shaft side towards power shaftLine tilt under side. And, possess more outstanding than this upper surface in a part for the upper surface of this lower line tiltRib. Wherein, " from the line tilt towards power shaft side of output shaft side " just refer to (the peace of the lower surface from shellDress face) to the distance of upper surface, the position of power shaft is lower than the position of output shaft.

Near of the output shaft of this geared system is because the relation of transmitting torque is assembled with larger gear,So inner space does not almost have unnecessary space, but have clearance spaces near of power shaft. ThisInvention is conceived to this state, and the upper surface of shell is formed as inclining towards power shaft side is descending from output shaft sideTiltedly. Thus, can correspondingly further dwindle size (volume) amount of shell entirety, and can be furtherLighting. And, on the other hand, in the present invention, possess outstanding from this upper surface in a part for upper surfaceRib. Thus, not only can make big or small densification, the lighting of shell entirety, but also can be by this shellIntensity (allowing torque) be maintained in identical with non-inclination shell in the past or more than it. This can be by inventionPeople's FEM analyzes and determines.

Its result, can either realize densification, the lighting of geared system entirety, again can be by the appearance of shellBeing permitted torque maintains and equated or equal above value in the past.

Invention effect

According to the present invention, can either maintain compared with highland the torque of allowing of geared system, can realize again this gearInstall overall densification, lighting.

Brief description of the drawings

Fig. 1 is the stereogram that represents a routine related geared system of embodiments of the present invention.

Fig. 2 is the stereogram of only shell of said gear device being observed from the angle different from Fig. 1.

Fig. 3 is the top view that schematically represents the internal structure of said gear device.

Fig. 4 is the front view of said gear device.

Fig. 5 is the top view of said gear device.

Fig. 6 is the left side view of said gear device.

Fig. 7 is the right side view of said gear device.

Fig. 8 is the upward view of said gear device.

Fig. 9 is the rearview of said gear device.

In figure: 12-geared system, 14-power shaft, 16-output shaft, 18-shell, 20-bottom surface, under 32-Surface, 26-upper case, 28-lower case, 30-upper surface, 34-foot, 141～143-upper surfaceRib, P-divisional plane.

Detailed description of the invention

Below, describe with reference to the accompanying drawings the related geared system of an example of embodiments of the present invention in detail.

Fig. 1 is the stereogram of the related geared system of an example of embodiments of the present invention, and Fig. 2 only willThe stereogram that the shell of this geared system is observed from the angle different from Fig. 1. And Fig. 3 is signal earth's surfaceShow the top view of the internal structure of said gear device, Fig. 4～Fig. 9 is respectively 6 of this geared systemFigure.

This geared system 12 is to have power shaft 14 and output shaft 16, and the lower surface of shell 18 is installedThe gear of the so-called lower surface mount type that is mounted face in chassis or the bottom surface 20 etc. of bridge crane and useDevice. In following embodiment, describe as the situation that is installed on bottom surface 20.

The shell 18 of this geared system 12 is by the axle of the axle center O1 to comprise power shaft 14 and output shaft 16Upper case 26 and lower case 28 that the divisional plane P of the level of heart O2 is cut apart form.

Both are all roughly rectangular shape upper case 26 and lower case 28. But, top as described laterThe upper surface 30 of shell 26 is the face from output shaft 16 to 14 line tilts of power shaft.

Start to describe from the structure of lower case 28.

The lower surface 32 of lower case 28 is configured for being arranged on the installed surface of bottom surface 20. Particularly,As shown in the upward view of the front view of Fig. 4, Fig. 8, at the lower surface 32 of lower case 28, at 4 jiaos andCentral total 6 places of long side direction X dispose the 34(34A～34F of foot of rectangle). In addition, this realityExecute in mode, the direction that links the axle center O1 of power shaft 14 and the axle center O2 of output shaft 16 becomes gear" the long side direction X " of device 12. Be formed with for inserting not shown bolt at the 34A～34F of footBolt hole 38(38A～38F) (with reference to figure 8). Lower case 28(and be linked to this lower case 28Upper case 26) be installed on bottom surface 20 by these 6 34A～34F of foot.

Holding up four vertical planes from the lower surface 32 of lower case 28 with continuum of states, is mainly Fig. 4Shown (power shaft 14 and output shaft 16 are outstanding) front, bottom 42, at the lower left side face shown in Fig. 644, the back side, bottom 48 shown in the lower right side 46 shown in Fig. 7, Fig. 9.

The upper surface 50 of lower case 28 forms the bottom divisional plane P1 as a side of described divisional plane P.The upper surface of lower case 28 is open upward.

On the other hand, the upper surface 30 of upper case 26 is descending towards power shaft 14 sides from output shaft 16 sidesTilt. That is, with regard to the lower surface 32(installed surface from shell 18) to regard to the distance of upper surface 30, inputThe position of axle 14 is lower than the position of output shaft 16. In this embodiment, due to the axle center O1 of power shaft 14Being set as the installed surface apart from lower surface 32(with the axle center O2 of output shaft 16) identical height is (owing to being waterFlat), if be therefore conceived to upper case 26, also can be regarded as from the axle center O1 of power shaft 14 to tableThe distance L 2 of face 30 is less than distance (size) L1 from the axle center O2 of output shaft 16 to upper surface 30.Can also be interpreted as distance L 1, distance L 2 be respectively from the position of output shaft 16 and power shaft 14 pointFace P is to the distance of upper surface 30.

Hold up 4 vertical planes, i.e. Fig. 4 from the surrounding of the upper surface 30 of upper case 26 with continuum of statesUpper left-hand face shown in shown (power shaft 14 and output shaft 16 are given prominence to) top front face 52, Fig. 654, the top rear face 58 shown in the upper right face 56 shown in Fig. 7, Fig. 9. The following table of upper case 26Face 60 form with the bottom divisional plane P1 of lower case 28 opposed/the top divisional plane P2 of butt. Outside topThe lower surface 60 of shell 26 is open downward.

Lower case 28 and upper case 26 are with divisional plane P(P1, P2) pass through spiral shell under the state of buttBolt 66A～66P links. Symbol 67A～67P of Fig. 2 is that the bolt hole for its existence (is only shown in Fig. 2In observable scope). Each bolt 66A～66P is apart from height (thickness) h1～h3 difference of divisional plane PBe because, the load difference (with reference to figure 4) that bolt 66A～66P bears.

The drive system of this geared system 12 shown in Fig. 3. In addition, although Fig. 3 be equivalent to outside topThe top view of the state that shell 26 is removed, but not shown bolt or bolt hole etc., entirety is by signalization, in detailMay not be necessarily in thin part and other drawings take correct matching.

The drive system of this geared system 12 possesses power shaft 14, the 1st jackshaft the 71, the 2nd jackshaft 72And output shaft 16, have by being arranged at the 1st pinion 74 of power shaft 14 and being arranged at the 1st jackshaftThe 1st helical tooth wheels 78 that 71 the 1st gear 76 forms, by being arranged at the 2nd of the 1st jackshaft 71Pinion 80 and be arranged at the 2nd helical tooth wheels 84 that the 2nd gear 82 of the 2nd jackshaft 72 forms,And by being arranged at the 3rd pinion 86 of the 2nd jackshaft 72 and being arranged at the output gear of output shaft 16The 88 deferent segment helical tooth wheels 90 that form. In addition, in this embodiment, in the middle of power shaft 14 and the 1stBetween axle 71, dispose lazy axle 92, idle pulley 94 between the 1st pinion 74 of the 1st helical tooth wheels 78 withBetween the 1st gear 76. It is intended to neatly corresponding due to former in purposes thereby want to adjust power shaft 14And the requirement that distance L in the heart 3 between output shaft 16 is such. Therefore, this lazy axle 92 and idle pulley 94 are not tooContribute to " decelerating effect " of drive system. Therefore, do not have special requirement to adjust the feelings of distance L 3 in the heartUnder condition, can omit.

In this embodiment, each axle 14, axle 16, axle 71, axle 72, axle 92 are in order to bear by each spiralThe thrust load that gear train produces, by being respectively arranged with taper roll bearing 101, the automatic aligning of 1 pairRoller bearing 102～105 is supported on dead eye 111～115, the axle of lower case 28 and upper case 26Hold hole 116～120. As shown in Figure 2, by form respectively the semicircle orifice of downside at lower case 28111A～115A forms the semicircle orifice 111B～115B of upside at upper case 26, form thus face sideDead eye 111～115 entirety (circular dead eye 111～115). Although not shown, rear sideAlso be same structure. In addition, the kind of bearing is not limited to above-mentioned example. For example, can be as angle(can bearing thrust load) other bearings that contact roller bearing is such. Not produce thrust loadCommutating tooth wheels form when drive system, can be also common roller bearing. And, without using high torque (HT)Time, rolling element may not be roller (roller) class, can be also ball (ball) class.

In this embodiment, although power shaft 14 and output shaft 16 are from front 42, bottom or top front face 52Outstanding, but the rear side of power shaft 14 and output shaft 16 and the 1st jackshaft the 71, the 2nd jackshaft 72And lazy axle 92 is housed inside (outstanding) in shell 18, dead eye 111～115, dead eye 116～120 pass through bolt 129 by 121～128 obturations of inaccessible plate.

As shown in Figure 1, Figure 2, Fig. 4 in detail shown in, in this embodiment, the upper surface 30 of upper case 26If remove a part (rib described later or inspection socket), with height from output shaft side towards power shaft side step-downDescending being formed slopely. More specifically, the axle center O2 of output shaft 16 directly over become near the Po1 of positionFor radius of curvature r1(=L1) the 1st curve part 30C1, from by position Po1 directly over this slightly near inputThe tangent line T1 of this radius of curvature r1 of the position Po2(of axle side centered by the O2 of axle center is apart from the inclination of level(θ 1) position consistent with the cant angle theta 1 of the 1st line part 30S1) be formed with relative lower surface 32 with directlyThe 1st line part 30S1 that wire tilts.

The 1st line part 30S1 through the 2nd curve part 30C2(of radius of curvature r3 from Po3Dao position, positionThe scope of Po4) with the 2nd line part 30S2 with respect to lower surface 32 linearly inclinations of cant angle theta 2Continuous smoothly. The 2nd line part 30S2 further through the 3rd curve part 30C3(of radius of curvature r5 from positionPut the scope of Po5 to position Po6) directly and upper right face 56 continuous. The 1st line part 30S1 inclinesIn the cant angle theta 2 of oblique θ 1 and the 2nd line part 30S2, the inclination of the 2nd line part 30S2 of power shaft sideθ 2 is larger. Thus, can make from output shaft side, in the time that power shaft side becomes large successively, to makeThe lower line tilt on surface 30 and adjacent upper right face 56 are continuous smoothly.

In addition, in this embodiment, in the upper surface 30 of upper case 26 output shaft 16 and power shaftA contrary side, the 1st curve part 30C1 of described radius of curvature r1 is with the outside circle along output gear 88Mode continuous, and with roughly coaxial shape bending of output shaft 16. Thus, realize upper case 26Densification and the weight reduction of upper surface 30 and the corner periphery of upper left-hand face 54. In addition, symbol 64It is the inspection oilhole for injecting oil-level stick (detecting the rod of oil mass).

The upper surface 30 of lower line tilt be provided with from this upper surface 30 upward projecting height h4 tableFace rib 141. In this embodiment, due to the lower line tilt of upper surface 30, be provided with this upper surface rib 141Height (apart from the size of the divisional plane P) h5 of upper surface 30 of part compared with output shaft 16 sides quiteLow, be therefore suppressed in also lower than the height h6 of the front end of upper surface rib 141 (upper end) 141A. On thisFace rib 141 is crossed over top front face 52 and the top rear face 58 adjacent with upper surface 30 and is formed continuously,And be arranged at 161 one-tenth, near the front upper rib 151 of (top) of power shaft 14 and upper rear portion ribIntegrated. Particularly, upper surface rib 141 and the front upper that forms continuously with this upper surface rib 141Rib 151, upper rear portion rib 161 are arranged at while observation from above-below direction and dead eye 111 weights of power shaft 14Folded position.

In this embodiment, above output shaft 16, be also formed with the upper surface rib more outstanding than upper surface 30142, upper surface rib 143. Be formed at upper surface rib 142, the upper surface rib 143 of the top of output shaft 16Quantity in this example, be 2, more than near the number of upper surface rib 141 of that is formed on power shaft 14Amount (in this example being 1). And, in this embodiment, be arranged at top upper of output shaft 16Face rib 142, upper surface rib 143 are also across top front face 52 and the top rear face adjacent with upper surface 3058 form continuously, and with near the front upper rib 152, just of (top) that is arranged at output shaft 16Face top rib 153 and upper rear portion rib 162, upper rear portion rib 163 integralization. Particularly, upper tableFace rib 142, upper surface rib 143 and just forming continuously with this upper surface rib 142, upper surface rib 143Face top rib 152, front upper rib 153, upper rear portion rib 162, upper rear portion rib 163 are arranged at from upperWhen lower direction is observed and the overlapping position of the dead eye 115 of output shaft 16.

And, in present embodiment, be not near of power shaft 14 and output shaft 16, and the 1stNear the 1st jackshaft that partially leans on of of near of jackshaft 71, the 2nd jackshaft 72 and lazy axle 92 is also distinguished shapeBecome to have front upper rib 154～156 and upper rear portion rib 164～166. , be formed with respectively 6 fronts151～156 and 6 upper rear portion ribs 161～166 of top rib. But, in this embodiment, at theseIn the position of front upper rib 154～156 and upper rear portion rib 164～166, by inspection socket described later190 outstanding configuration is strengthened, and does not therefore form the rib outstanding from upper surface.

And, in this embodiment, below lower case 28, with front upper rib 151, frontThe long side direction position of top rib 154, front upper rib 156 correspondences be also formed with positive basifacial rib 171,Positive basifacial rib 174, positive basifacial rib 176, with upper rear portion rib 161, upper rear portion rib 164, the back of the bodyThe long side direction position of face top rib 166 correspondences is also formed with lower backside rib 181, lower backside rib184, lower backside rib 186(is because strength relationship is corresponding with front upper rib 155 and upper rear portion rib 165Position, omit and form positive basifacial rib and lower backside rib). And, near of output shaft 16(below), in front and the back side be formed with and dead eye roughly same width front heavy section 177, the back of the bodyFace heavy section 187. This is because this geared system 12 passes through the foot of lower case 28 34 following tablesFace) be fixed on bottom surface 20 and install, therefore load especially easily concentrate on lower case 28 fromOutput shaft 16 is to the part of the 34A～34D of foot output shaft 16 near.

In addition, be provided with inside for checking geared system 12 at the upper surface 30 of upper case 26Inspection socket 190. It is visual preferential that inspection socket 190 makes, and is disposed at this upper surface 30(length L 5) in compriseThe position of the central C1 of long side direction X. Inspection socket 190 is outstanding from (line tilt being) upper surface 30And flatly form. Particularly, due to the lower line tilt of upper surface 30 itself, therefore with regard to projecting height andSpeech, the projecting height h11 of power shaft side is greater than the projecting height h10 of output shaft side. Being somebody's turn to do of inspection socket 190" give prominence to " and (be provided with inspection socket same of the main cause that generally speaking becomes the intensity that reduces upper surfaceTime) prevent strength decreased, or contribute on the contrary strength-enhanced. , the inspection socket in this embodiment190 play a role as a kind of rib of strengthening upper surface 30. Therefore, as aforementioned, front upper rib 154～156 or the position (near the position of inspection socket 190) of upper rear portion rib 164～166 in, need to be from not upperThe rib that surface 30 is outstanding. Top at inspection socket 190 is provided with lid 194 by bolt 196.

In addition, the top front face 52 of upper case 26 and the bottom of top rear face 58, lower case 28 are justFace 42 just substantially becomes respectively what is called " mirror image symmetry " with the back side, bottom 48 and forms symmetrically. CauseThis, in this embodiment, although from face side, power shaft 14 and output shaft 16 are given prominence to, according to useOn the way, can change into from rear side power shaft or output shaft are given prominence to.

Then, the effect of the related geared system of this embodiment is described.

In present embodiment, because the upper surface 30 of upper case 26 becomes descending inclined plane, therefore gearThe volume less (compact) that installs 12 entirety,, so its weight also correspondingly alleviates, therefore manufacture,The operations such as assembling, carrying, installation (compared with the past) are lighter. But, however, or fullyMaintain necessary intensity.

Below, more specifically describe. If power shaft 14 is by not shown motor rotation, warpClip the 1st helical tooth wheels the 78, the 2nd helical tooth wheels 84 and deferent segment helical tooth wheels of idle pulley 9490 export from output shaft 16 the deceleration rotation that torque strengthens. The situation of present embodiment, each axle 14, axle16, axle 71, axle 72, related radial load and the thrust load of axle 92, from dead eye 111～115,Dead eye 116～120 is passed to upper case 26 and lower case 28. Geared system 12 is by being arranged atThe foot 34 of the bottom of lower case 28 is installed on bottom surface 20, therefore attached in the foot 34 of lower case 28The nearly load that produces.

On the other hand, upper case 26 sides are due to (the limit of pressing from outside not having based on bottom surface 20 gradesSystem), therefore upper case 26 sides easily produce distortion or vibration. At this, if the upper table of upper case 26The rigidity of face 30 is lower, and the deflection of this upper surface 30 or the amplitude of vibration become large, under this impact involvesNear portion's shell 28 and become the foot 34 of this lower case 28 and further to produce the main of loadReason. And, increase at the vibration amplitude of upper surface 30, be not only noise and become large, but also become axleHold the main cause of the life-span reduction of all parts of 101～105 geared systems such as grade 12.

In this embodiment, upper square due to the power shaft 14 in the upper surface 30 of upper case 26The upper surface rib 141 that Cheng Youcong upper surface 30 is outstanding, therefore utilizes near the space of power shaft 14 especiallyRealize the structure of lighting, can maintain near this power shaft 14 of upper case 26 compared with highland (on simultaneouslyThe intensity of upper surface 30 just). And, be particularly formed at the upper surface rib of the top of power shaft 14141 are formed at the position diminishing because of inclination and the distance of divisional plane P, therefore this upper surface rib 141 beforeThe height h6 of end 141A is suppressed must be lower, and also without detriment to compactedness.

And, in this embodiment, because the lower line tilt of this upper surface 30 is from the 1st curve part 30C1 warpThe 1st line part 30S1, further links with the 2nd line part 30S2 through the 2nd curve part 30C2, makes downWhen line tilt increases to θ 2 from θ 1, flat to adjacent upper right face 56 through the 3rd curve part C3Sliding ground continuously, therefore compared with for example forming the structure of line tilt under the poor formula of ladder (staged), Neng GoufangStop in upper surface 30 stress concentration of local, and can guarantee higher intensity. And, due to power shaft 14The cant angle theta 2 of the 2nd line part 30S2 of side is greater than the cant angle theta of the 1st line part 30S1 of output shaft 16 sides1, therefore can either guarantee necessary intensity, again further densification. And, because effectively dispose 2Individual the 1st line part 30S1, the 2nd line part 30S2, so manufacture easily, can suppress again cost.

And, by different (θ 1 < θ 2) the 1st line part 30S1, the 2nd line part 30S2 warp of tiltingCurve (the 2nd curve part 30C2) links, and therefore entirety is level and smooth " convex shape ". Therefore,Compared with the structure (upper surface entirety is single flat structure) only tilting with linearity, can enter oneStep is suppressed at the vibration that upper surface 30 produces, and can also further reduce the noise of generation.

And, in present embodiment, except the top of power shaft 14, more also shape above output shaft 16Become to have than the upper surface rib 142 of the top greater number of power shaft 14, upper surface rib 143, and, gearDevice 12 front and the back side be also formed with front upper rib 151～156, upper rear portion rib 161～166 orUnder positive basifacial rib 171, positive basifacial rib 174, positive basifacial rib 176, lower backside rib 181, the back sidePortion's rib 184, lower backside rib 186. And the bottom of output shaft 16 becomes and does not have so-called rib, andTo there is the front heavy section 177, the back side that the part entirety from output shaft 16 to foot 34 are made as to heavy wallThe structure of heavy section 187.

And, particularly upper surface rib 141～143 is spreaded all over to the top front face 52 adjacent with upper surface 30And top rear face 58 forms continuously, and make itself and front upper rib 151～153, upper rear portion rib 161～163 is integrated. , upper surface rib 141～143, front upper rib 151～153, upper rear portion rib161～163 are formed as the top of the power shaft 14 and the output shaft 16 that surround as a whole upper case 26Portion. Therefore, stiffening effect is very high.

These multiple structures contribute to separately or acting in conjunction and further strengthen intensity.

In addition, in this embodiment, by so with line tilt under being combined to form of straight line and curve, althoughIn intensity, obtained more excellent speciality, but in the present invention, the lower line tilt of upper surface may not be certainBe defined in this, for example can be by whole descending being formed slopely as linearity or curve-like. Further, also can arrangeStair-stepping part.

And, in above-mentioned embodiment, not only also upper at output shaft above the power shaft of upper caseSide is outstanding formation from the outstanding upper surface rib of upper surface also, thereby taken into account owing to avoiding wall thickening to causeInhibition and strength maintenance that weight increases, but in the present invention, to how configuring, configuring several upper surfacesRib, is not particularly limited.

And, be formed at upper surface inspection socket its around form from upper surface is outstanding, but in the present invention,(particularly for output shaft side) may not form with outstanding around state. Otherwise, be not only defeatedEnter axle side, output shaft side also can be to form more significantly and compared with the outstanding state in highland, ledge thickDegree also may be thicker than above-mentioned example. Thus, can expect further to strengthen intensity.

And, in above-mentioned embodiment, be not only the upper surface rib outstanding from upper surface, at upper caseFront and the back side also form respectively front upper rib and upper rear portion rib, and at the positive of lower case and the back of the bodyFace also forms respectively positive basifacial rib and lower backside rib. But, in the present invention, about these front ribs andBack side rib, may not form. About shape or form interval, form number, be also not limited to above-mentionedThe example of embodiment. The integrated of upper surface rib and front rib and back side rib may not be also necessary.

And, in above-mentioned embodiment, remove upper surface rib 141～143 and inspection socket 190 if show,Upper surface 30 is from the output shaft side direction power shaft side example that ground downlink tilts of remaining the same from beginning to end, but the present inventionIn, if upper surface line tilt from output shaft side direction power shaft side entirety is, only in the part of upper surfaceExist bossing also harmless. Now, this bossing can also be interpreted as rib or rib.

And, in above-mentioned embodiment, though geared system is split into lower case and upper case, rightIn gear casing entirety, with which kind of form divided (or being integrated), the present invention is not particularly limited. ?While formation by upper case and lower case, also comprise the bolt of fixing this upper case and lower case, rightIn bolt number or the size of each portion, be also not limited to number or the size of above-mentioned embodiment.

And the number of foot 34 does not also limit. For example, the 34A of foot and the 34B of foot, the 34C of footLinking respectively with the 34D of foot, the 34E of foot and the 34F of foot is 1 foot, adds up to 3 foots alsoCan. Otherwise, then append 1 group, add up to 8 foots also can.

The application advocates the Japanese patent application 2011-289251 based on application on December 28th, 2011Number priority. The full content of its application is by reference to being applied in this description.

Claims (10)

1. a geared system, it has power shaft and output shaft, and the lower surface that is arranged on shell uses, it is characterized in that,

The upper surface of the shell of this geared system is from the line tilt towards power shaft side of output shaft side, and,

Described upper surface in this lower line tilt possesses the rib outstanding from described upper surface and inspection socket,

From the outstanding rib of described upper surface, be formed at the top of described power shaft and the top of described output shaft,

Described inspection socket, between described power shaft and output shaft, forms from described upper surface is outstanding,

Between described power shaft and output shaft, be also formed with rib,

The rib of the rib of the top of described power shaft and the top of described output shaft, outstanding on described upper surface and the face adjacent with this upper surface, and,

Although it is not the rib between described power shaft and output shaft is outstanding on the face adjacent with described upper surface, outstanding at described upper surface.

2. geared system as claimed in claim 1, is characterized in that,

On the face adjacent with the upper surface of described lower line tilt, be also formed with rib, and,

This rib that is formed at the upper surface of rib on adjacent face and described lower line tilt forms as one continuously.

3. geared system as claimed in claim 1, is characterized in that,

Described inspection socket is disposed at the central position that comprises long side direction in described upper surface.

4. the geared system as described in any one in claim 1～3, is characterized in that,

Described upper surface has at least 2 parts that tilt with linearity with respect to described lower surface, and,

The gradient of the part tilting with linearity of power shaft side is greater than the gradient of the part tilting with linearity of output shaft side.

5. the geared system as described in any one in claim 1～3, is characterized in that,

Described upper surface has the part tilting with curve-like.

6. geared system as claimed in claim 4, is characterized in that,

Described upper surface has the part tilting with curve-like.

7. the geared system as described in any one in claim 1～3, is characterized in that,

The shell of described geared system comprises upper case and lower case, and described upper case and lower case be split to form by the divisional plane in the axle center of the axle center to comprise described power shaft and described output shaft,

The upper surface of described lower line tilt is the upper surface of described upper case.

8. geared system as claimed in claim 4, is characterized in that,

The shell of described geared system comprises upper case and lower case, and described upper case and lower case be split to form by the divisional plane in the axle center of the axle center to comprise described power shaft and described output shaft,

The upper surface of described lower line tilt is the upper surface of described upper case.

9. geared system as claimed in claim 5, is characterized in that,

The shell of described geared system comprises upper case and lower case, and described upper case and lower case be split to form by the divisional plane in the axle center of the axle center to comprise described power shaft and described output shaft,

The upper surface of described lower line tilt is the upper surface of described upper case.

10. geared system as claimed in claim 6, is characterized in that,

The shell of described geared system comprises upper case and lower case, and described upper case and lower case be split to form by the divisional plane in the axle center of the axle center to comprise described power shaft and described output shaft,

The upper surface of described lower line tilt is the upper surface of described upper case.