CN103890452A - Gear transmission device - Google Patents
Gear transmission device Download PDFInfo
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- CN103890452A CN103890452A CN201280051928.1A CN201280051928A CN103890452A CN 103890452 A CN103890452 A CN 103890452A CN 201280051928 A CN201280051928 A CN 201280051928A CN 103890452 A CN103890452 A CN 103890452A
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- Prior art keywords
- external tooth
- axial
- tooth
- processing department
- diameter reducing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
- F16H2001/323—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear comprising eccentric crankshafts driving or driven by a gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
First outer teeth (14a) each have a first machined section (142) at one of the ends thereof, and the tooth surface of the first machined section (142) is machined so that the tooth surface extends inward in the radial direction as the tooth surface extends toward an end thereof in the axial direction. Second teeth (16a) each have a machined section (162) at one of the ends thereof, and the tooth surface of the second machined section (162) is machined so that the tooth surface extends inward in the radial direction as the tooth surface extends toward an end thereof in the axial direction. Inner tooth pins (3) are each provided with: a first reduced diameter section (31) provided at the portion of the inner tooth pin (3) which corresponds in the radial direction to an end of each of the first outer teeth (14a), the end being on the side on which the first machined section (142) is not provided; and a second reduced diameter section (32) provided at the portion of the inner tooth pin (3) which corresponds in the radial direction to an end of each of the second outer teeth (16a), the end being on the side on which the second machined section (162) is not provided.
Description
Technical field
The present invention relates to a kind of gear drive.
Background technique
In the past, the known gear drive that has a kind of eccentric oscillating-type, its interlock of eccentric rotary by the eccentric part of the external tooth gear that makes to close with the internal tooth pin rodent of internal-gear and bent axle and swing rotary, thus the output rotation (for example, with reference to patent documentation 1) of slowing down with respect to input speed obtained.
In the gear drive of recording, be provided with the multiple interior alligator engaging with 2 external tooth gears in patent documentation 1.Each interior alligator has the first engaging piece, the second engaging piece and connects the joint of these two engaging pieces.The axial two end part of each engaging piece are subjected to crowning processing (Fig. 3, Fig. 6 of patent documentation 1).Accordingly, the edge stress producing between the outer circumferential face at the axial two end part in each engaging piece of the flank of tooth of each external tooth gear and interior alligator reduces.In addition, in Fig. 7 of patent documentation 1, not only interior alligator is subjected to crowning processing, and the flank of tooth at the two end part of each external tooth gear is also subjected to crowning processing.Accordingly, the edge stress producing between the outer circumferential face at the axial two end part in each engaging piece of the flank of tooth at the two end part of each external tooth gear and interior alligator further reduces.
But, in the gear drive shown in Fig. 3 and Fig. 6 of patent documentation 1, need to carry out crowning processing to the two end part of the first engaging piece in each interior alligator, crowning processing is carried out in the two end part of the second engaging piece, and the operation these two engaging pieces being connected by joint, therefore, there is the problem that causes cost to improve.And, as shown in Fig. 7 of patent documentation 1, be subjected to crowning processing at the two end part of each external tooth gear, also increase the man-hour that crowning machining needs and cost improves.
Prior art document
Patent documentation
Patent documentation 1: No. 2009-293650, Japanese Patent Publication communique JP
Summary of the invention
The object of the present invention is to provide one can suppress to produce edge stress between external tooth gear and interior alligator, can suppress again the gear drive that cost improves.
Gear drive involved in the present invention, comprising: urceolus, there is inner peripheral surface, and be provided with the vertically multiple cotter ways of extension along circumferential with appointed interval at this inner peripheral surface; Interior alligator, is disposed in each of described multiple cotter ways; Bent axle, has the first eccentric part and the second eccentric part that configure along described axially-aligned with the phase difference of specifying each other, and is provided in described urceolus and can centered by axle, rotates; The first external tooth gear, has the outer circumferential face that is provided with the first external tooth, and is installed in described the first eccentric part, and this first external tooth gear closes described the first external tooth and described internal tooth pin rodent on one side, on one side the swing rotary with the eccentric rotary interlock of described the first eccentric part; The second external tooth gear, has the outer circumferential face that is provided with the second external tooth, and is installed in described the second eccentric part, and this second external tooth gear closes described the second external tooth and described internal tooth pin rodent on one side, on one side the swing rotary with the eccentric rotary interlock of described the second eccentric part; And bearing, be passed by the swing rotary of described the first external tooth gear and described the second external tooth gear, with respect to described urceolus rotation.
Described the first external tooth has the first processing department in described axial any one of them end.It is offside in radially inner side that the flank of tooth of described the first processing department is processed to more to approach the axial end portion of this flank of tooth.Described the second external tooth has the second processing department in described axial any one of them end.It is offside in radially inner side that the flank of tooth of described the second processing department is processed to more to approach the axial end portion of this flank of tooth.
Each interior alligator has the first diameter reducing part and the second diameter reducing part.Described the first diameter reducing part be processed to be not provided with described the first processing department a side described the first external tooth end diametrically position in opposite directions along with towards axial and undergauge.Described the second diameter reducing part be processed to be not provided with described the second processing department a side described the second external tooth end diametrically position in opposite directions along with towards axial and undergauge.
Accompanying drawing explanation
Fig. 1 is the sectional view that represents the related gear drive of the first mode of execution of the present invention.
Fig. 2 is the II-II line sectional view of Fig. 1.
Fig. 3 is near the amplification view of the structure mate of interior alligator in the gear drive shown in presentation graphs 1 and external tooth gear.
Fig. 4 is the amplification stereogram near the structure interior alligator of the gear drive shown in explanatory drawing 1 and the mate of external tooth gear, is the figure that dissects a part for described structure.
Fig. 5 represents the related gear drive of the second mode of execution of the present invention, is the amplification view that represents near the structure mate of interior alligator and external tooth gear.
Embodiment
Below, the related gear drive 1 of mode of execution that present invention will be described in detail with reference to the accompanying.Gear drive 1 is applicable to rotating part, the rotating part of various work mechanisms etc. of solid of rotation or the wrist joint etc. of such as robot as speed reducer.
< the first mode of execution >
(overall structure of gear drive)
In the related gear drive 1 of the first mode of execution, the first external tooth gear 14 is swing rotary with the first eccentric part 10a interlock of bent axle 10, and, the second external tooth gear 16 is swing rotary with the second eccentric part 10b interlock of bent axle 10, thus, obtain the output rotation of slowing down with respect to the rotating speed being transfused to.
As shown in Figure 1, gear drive 1 comprises urceolus 2, multiple interior alligator 3, bearing 4, input shaft 8, multiple (for example 3) bent axle 10, the first external tooth gear 14, the second external tooth gear 16 and multiple (for example 3) transmission gear 20.
As shown in Figure 2, urceolus 2 is the parts that form the outer surface of gear drive 1, is general cylindrical shape shape.Be formed with multiple cotter way 2b at the inner peripheral surface of urceolus 2.Each cotter way 2b extends axially along urceolus 2, and with the section shape of semicircular in shape on axially vertical section.These cotter ways 2b at the inner peripheral surface of urceolus 2 along circumferentially uniformly-spaced to arrange.
Each interior alligator 3 is installed in corresponding cotter way 2b.Particularly, each interior alligator 3 is embedded in respectively corresponding cotter way 2b.Axial the extending axially along urceolus 2 of each interior alligator 3.Accordingly, multiple interior alligators 3 along urceolus 2 circumferentially uniformly-spaced to arrange.At cotter way 2b, each interior alligator 3 can rotate centered by its axle.The first external tooth gear 14 and the second external tooth gear 16 are engaged in alligator 3 in these.About the detailed construction of interior alligator 3, will narrate in the back.
As shown in Figure 1, bearing 4 is to be contained in this urceolus 2 with the state of urceolus 2 arranged coaxial.Bearing 4 is rotated centered by identical axle with respect to urceolus 2.Particularly, bearing 4 is supported for and can carries out relative rotation with urceolus 2 by a pair of supporting bearing 6, and this pair of supporting bearing 6 is configured to spaced-apart in the axial direction interval.In the present embodiment, bearing 4 possesses base portion 4a, the 4b of end plate portion and multiple (for example 3) axial region 4c.But be not limited to this structure.
The 4b of end plate portion is spaced apart in the axial direction and arrange with respect to base portion 4a, and in urceolus 2, is configured in axial the other end side of urceolus 2.Radially central part at the 4b of end plate portion is provided with penetration hole 4f.Around penetration hole 4f, be provided with multiple (for example 3) crankshaft installed hole 4g(in the position corresponding with multiple mounting hole 4e of base portion 4a and be designated hereinafter simply as mounting hole 4g).In urceolus 2, be formed with closed space, this closed space is surrounded and is formed by both internal surface and the inner peripheral surface of urceolus 2 toward each other of the 4b of end plate portion and base portion 4a.
3 axial region 4c and base portion 4a arrange integratedly, and extend straight to the 4b of end plate portion side from base portion 4a.These 3 axial region 4c edges are circumferentially uniformly-spaced to be arranged (with reference to Fig. 2).Each axial region 4c is anchored on the 4b(of end plate portion with reference to Fig. 1 by bolt 4h).Accordingly, base portion 4a, axial region 4c and the 4b of end plate portion are integrated.
Input shaft 8 is brought into play function as input part, is rotated to this input part input by figure drive motor slightly.Input shaft 8 is inserted into the penetration hole 4f of the 4b of end plate portion and the penetration hole 4d of described base portion 4a.It is consistent with the axle center of urceolus 2 and bearing 4 that input shaft 8 is configured to its axle center.Input shaft 8 rotates centered by its axle.Outer circumferential face in the tip portion of input shaft 8 is provided with input gear 8a.
3 bent axles 10 in urceolus 2 to be uniformly-spaced configured in (with reference to Fig. 2) around input shaft 8.Each bent axle 10 is installed on respectively the mounting hole 4e of corresponding base portion 4a and the mounting hole 4g(of the 4b of end plate portion with reference to Fig. 1).Particularly, from axial wherein one end of each bent axle 10, the axial inner side part of designated length is installed in the mounting hole 4e of base portion 4a by the first crankshaft bearing 12a.On the other hand, axial the other end of each bent axle 10 is installed in the mounting hole 4g of the 4b of end plate portion by the second crankshaft bearing 12b.Each bent axle 10 is supported for and can centered by axle, rotates with respect to bearing 4 by two crankshaft bearing 12a, 12b.
Each bent axle 10 has the first eccentric part 10a and the second eccentric part 10b, the first eccentric part 10a and the second eccentric part 10b alignment arrangements vertically between the part being supported by two crankshaft bearing 12a, 12b.The first eccentric part 10a and the second eccentric part 10b be cylindrical shape respectively.The first eccentric part 10a and the second eccentric part 10b respectively from the axle center of bent axle 10 with the offset bias of specifying, and be configured to have mutually the phase difference of specified angle.In addition, in a wherein end of bent axle 10, be positioned at the position in axial outside compared with the part being installed in the mounting hole 4e of base portion 4a, be provided with the 10c of the portion that is fitted that transmits gear 20 for installing.
As shown in Figures 1 and 2, the first external tooth gear 14 is disposed in the described closed space in urceolus 2.The first external tooth gear 14 is installed on the first eccentric part 10a of each bent axle 10 by the first roller bearing 18a.If each bent axle 10 rotates and the first eccentric part 10a eccentric rotary, the first external tooth gear 14 is engaged in interior alligator 3 with this eccentric rotary interlock while carries out swing rotary.
The first external tooth gear 14 has the size slightly less than the internal diameter of urceolus 2.In the present embodiment, the first external tooth gear 14 has the first external tooth 14a, central part penetration hole 14b, multiple (for example 3) the first eccentric part inserting hole 14c and multiple (for example 3) axial region inserting hole 14d.But be not limited to this structure.
As shown in Figure 2, central part penetration hole 14b is arranged on the radially central part of the first external tooth gear 14.Input shaft 8 is inserted in central part penetration hole 14b to have the state of play.
3 the first eccentric part inserting hole 14c edges in the first external tooth gear 14 are circumferential to be uniformly-spaced arranged on around central part penetration hole 14b.The first eccentric part 10a of corresponding bent axle 10 is inserted through in each the first eccentric part inserting hole 14c so that the state of the first roller bearing 18a to be installed.
3 axial region inserting hole 14d edges in the first external tooth gear 14 are circumferential to be uniformly-spaced arranged on around central part penetration hole 14b.Each axial region inserting hole 14d is upwards being disposed in respectively 3 positions between the first eccentric part inserting hole 14c week.Corresponding axial region 4c is inserted through in each axial region inserting hole 14d to have the state of play.About the detailed construction of the first external tooth 14a, will narrate in the back.
The second external tooth gear 16 is disposed in the described closed space in urceolus 2.The second external tooth gear 16 is installed on the second eccentric part 10b of each bent axle 10 by the second roller bearing 18b.Corresponding and the spread configuration vertically of the configuration of the first external tooth gear 14 and this second external tooth gear 16 and the first eccentric part 10a and the second eccentric part 10b.If each bent axle 10 rotates and the second eccentric part 10b eccentric rotary, the second external tooth gear 16 is engaged in interior alligator 3 with this eccentric rotary interlock while carries out swing rotary.
The second external tooth gear 16 has the size slightly less than the internal diameter of urceolus 2.In the present embodiment, the second external tooth gear 16 has the second external tooth 16a, central part penetration hole 16b, multiple (for example 3) the second eccentric part inserting hole 16c and multiple (for example 3) axial region inserting hole 16d.But be not limited to this structure.These have the structure same with the first external tooth 14a, the central part penetration hole 14b of the first external tooth gear 14, multiple the first eccentric part inserting hole 14c and multiple axial region inserting hole 14d.The second eccentric part 10b of corresponding bent axle 10 is inserted through in each the second eccentric part inserting hole 16c so that the state of the second roller bearing 18b to be installed.About the detailed construction of the second external tooth 16a, will narrate in the back.
The rotation of input gear 8a is passed to corresponding bent axle 10 by each gear 20 that transmits.Each outer 10c of the portion that is fitted that is embedded in a wherein end that is arranged on corresponding bent axle 10 of gear 20 that transmits.Each gear 20 that transmits is centered by the axle identical with the running shaft of bent axle 10, with these bent axle 10 one rotations.Each gear 20 that transmits has the external tooth 20a engaging with input gear 8a.
(structure of interior alligator)
As shown in Figures 2 to 4, each interior alligator 3 is substantial cylindrical shape.Each interior alligator 3 is by a bar-shaped metalwork is implemented cutting and/or grind to form.In the present embodiment, by cutting and/or grinding, the outer circumferential face of each interior alligator 3 is implemented to crowning processing.Accordingly, the external diameter at the axial two end part of each interior alligator 3 is less than the external diameter at the position between these two end part.Particularly as described below.
Each interior alligator 3 has: at the first diameter reducing part 31 that is positioned at its axial wherein end; Be positioned at second diameter reducing part 32 of axial the other end; And cylindrical portion (intermediate portion) 33 between these diameter reducing parts 31,32.In each interior alligator 3, the first diameter reducing part 31, cylindrical portion 33 and the second diameter reducing part 32 are arranged vertically successively and are integrally formed.The section perpendicular to axial direction of the first diameter reducing part 31, the second diameter reducing part 32 and cylindrical portion 33 is circular.
The cylindrical shape of cylindrical portion 33, its external diameter is constant in the axial direction.The tapered shape of the first diameter reducing part 31.The external diameter of the first diameter reducing part 31 diminishes gradually along with approaching an axial wherein ora terminalis.The tapered shape of the second diameter reducing part 32.The external diameter of the second diameter reducing part 32 diminishes gradually along with approaching another axial ora terminalis.Therefore, in each interior alligator 3, the external diameter maximum of cylindrical portion 33.The outer circumferential face of the outer circumferential face of the first diameter reducing part 31 and the second diameter reducing part 32 is the flexure planes that protrude laterally.The outer circumferential face of the outer circumferential face of the first diameter reducing part 31 and the second diameter reducing part 32 is bending smoothly to ora terminalis separately.
The first diameter reducing part 31 is arranged on and the axial outboard end of the first external tooth 14a position in opposite directions diametrically.The second diameter reducing part 32 is arranged on and the axial outboard end of the second external tooth 16a position in opposite directions diametrically.
(structure of external tooth)
As shown in Figure 2, the first external tooth 14a is arranged on the outer circumferential face of the first external tooth gear 14.The flank of tooth of the first external tooth 14a is upper at section perpendicular to axial direction (section shown in Fig. 2), is at upwards level and smooth continuous waveform shape of whole week., the flank of tooth of the first external tooth 14a has the top that is positioned at radial outside and the bottom that is positioned at radially inner side along circumferential alternative arrangement.
Each top and each bottom are roughly circular shape on section perpendicular to axial direction.On multiple tops and multiple bottom integrated, form level and smooth curved surface.At this, top adjacent one another are and the border of bottom are in the footpath of the first external tooth gear 14 upwards, are positioned at top (peak) and the position on the flank of tooth of the middle at the end of the bottom of inner side at the top in outside most.
The number of teeth of the first external tooth 14a is set to the number that is slightly less than interior alligator 3.In the present embodiment, the number of teeth of the first external tooth 14a is set to than the number of interior alligator 3 few one.But be not limited thereto structure.The second external tooth 16a has the structure same with the first above-mentioned external tooth 14a.
As shown in Figures 3 and 4, the first external tooth 14a is engaged in the position of the first diameter reducing part 31 sides of the cylindrical portion 33 in interior alligator 3.The second external tooth 16a is engaged in the position of the second diameter reducing part 32 sides of the cylindrical portion 33 in interior alligator 3.The first external tooth 14a has the first external tooth main part 141 and the first processing department 142.The second external tooth 16a has the second external tooth main part 161 and the second processing department 162.
The first external tooth main part 141 is that its flank of tooth is parallel to axial position.The first external tooth main part 141 is in the axial direction from extending to the ora terminalis of the flank of tooth of the opposition side of the first processing department 142 with the boundary part of the first processing department 142.The first external tooth main part 141 diametrically with the first diameter reducing part 31 of interior alligator 3 in opposite directions, and, diametrically with the part of the cylindrical portion 33 of interior alligator 3 in opposite directions.In the axial direction, compared with the first diameter reducing part 31 of a part for the first external tooth main part 141 and interior alligator 3, be positioned at the second external tooth 16a side.The axial length of the first external tooth main part 141 is greater than the axial length of the first processing department 142.
The second external tooth main part 161 is that its flank of tooth is parallel to axial position.The second external tooth main part 161 is in the axial direction from extending to the ora terminalis of the flank of tooth of the opposition side of the second processing department 162 with the boundary part of the second processing department 162.The second external tooth main part 161 diametrically with the second diameter reducing part 32 of interior alligator 3 in opposite directions, and, diametrically with the part of the cylindrical portion 33 of interior alligator 3 in opposite directions.In the axial direction, compared with the second diameter reducing part 32 of a part for the second external tooth main part 161 and interior alligator 3, be positioned at the first external tooth 14a side.The axial length of the second external tooth main part 161 is greater than the axial length of the second processing department 162.
The first processing department 142 and the second processing department 162 arrange on position adjacent one another are in the axial direction.The first processing department 142 and the second processing department 162 are separately positioned on the inner end of the first external tooth 14a and the inner end of the second external tooth 16a., the first processing department 142 is arranged on the end of the second external tooth 16a side in the axial two end part of the first external tooth 14a.The second processing department 162 is arranged on the end of the first external tooth 14a side in the axial two end part of the second external tooth 16a.
The first processing department 142 is the positions that are processed to curved shape, so that more approaching the second axial external tooth 16a side of its flank of tooth is offside in radially inner side.It is offside in radially inner side that, the flank of tooth of the first processing department 142 is processed to more approach the axial end portion (ora terminalis of the flank of tooth) of its flank of tooth.In the present embodiment, the whole week that the first processing department 142 is arranged on the first external tooth 14a upwards., the first processing department 142 is arranged on along on all tops and bottom of circumferential array.The first processing department 142 in the footpath of interior alligator 3 upwards with the part of the cylindrical portion 33 of interior alligator 3 in opposite directions.
The second processing department 162 is the positions that are processed to curved shape, so that more approaching the first axial external tooth 14a side of its flank of tooth is offside in radially inner side.It is offside in radially inner side that, the flank of tooth of the second processing department 162 is processed to more approach the axial end portion (ora terminalis of the flank of tooth) of its flank of tooth.In the present embodiment, the whole week that the second processing department 162 is arranged on the second external tooth 16a upwards., the second processing department 162 is arranged on along on all tops and bottom of circumferential array.The second processing department 162 in the footpath of interior alligator 3 upwards with the part of the cylindrical portion 33 of interior alligator 3 in opposite directions.
The first diameter reducing part 31 and the first processing department 142 and the second processing department 162 are in the footpath of interior alligator 3 upwards not in opposite directions.The second diameter reducing part 32 and the first processing department 142 and the second processing department 162 are in the footpath of interior alligator 3 upwards not in opposite directions.
In the first processing department 142 and the second processing department 162, the working depth at top and the working depth of bottom can be same degree, but are not limited thereto.For example, also can make the working depth at top be greater than the working depth of bottom.
In addition, preferably the top (peak) at the top in the first external tooth 14a is adjusted to and suppresses when the first external tooth gear 14 swing rotary and the contacting of interior alligator 3 to the overhang of radial outside.Top for the top of the second external tooth 16a is also identical.
(action)
Next, the action of gear drive 1 is described.First, the driving of the motor for example omiting by figure, to the input shaft 8 input rotations of gear drive 1.Accordingly, input gear 8a rotates together with input shaft 8.The rotation of this input gear 8a is delivered to each bent axle 10 by each transmission gear 20.
Then, follow each bent axle 10 to rotate, the first eccentric part 10a of each bent axle 10 and the second eccentric part 10b eccentric rotary.Accordingly, eccentric rotary interlock with the first eccentric part 10a, the first external tooth gear 14 engages with the position of the first diameter reducing part 31 sides in the cylindrical portion 33 of interior alligator 3 on one side, swing rotary on one side, and, with the eccentric rotary interlock of the second eccentric part 10b, the second external tooth gear 16 engage with the position of the second diameter reducing part 32 sides in the cylindrical portion 33 of interior alligator 3 on one side, one side swing rotary.The swing rotary of the first external tooth gear 14 and the second external tooth gear 16 is delivered to bearing 4 by each bent axle 10, and bearing 4 entirety are rotated with respect to urceolus 2 with the rotating speed slowing down with respect to described input rotation.
< the second mode of execution >
Fig. 5 represents the gear drive 1 that the second mode of execution of the present invention is related, is the amplification view that represents near the structure of interior alligator 3 and the mate of external tooth gear 14,16.In addition, in the following description, also the description thereof will be omitted to mark the symbol identical with the first mode of execution for the structure identical with the first mode of execution.
As shown in Figure 5, in the second mode of execution, each interior alligator 3 has: be positioned at its axial central authorities neighbouring the first diameter reducing part 34 and the second diameter reducing part 35; Be positioned at the first cylindrical portion 36 of one of them axial outboard end compared with the first diameter reducing part 34; And be positioned at the second cylindrical portion 37 of another axial outboard end compared with the second diameter reducing part 35.
The cylindrical shape of the first cylindrical portion 36, its external diameter is constant in the axial direction.The cylindrical shape of the second cylindrical portion 37, its external diameter is constant in the axial direction.The first diameter reducing part 34 be processed to along with from the border of the first cylindrical portion 36 to the second axial diameter reducing part 35 sides and undergauge.The second diameter reducing part 35 be processed to along with from the border of the second cylindrical portion 37 to the first axial diameter reducing part 34 sides and undergauge.The outer circumferential face of the outer circumferential face of the first diameter reducing part 34 and the second diameter reducing part 35 is the flexure planes that protrude laterally.Boundary part towards each other of the outer circumferential face of the outer circumferential face of the first diameter reducing part 34 and the second diameter reducing part 35 and smooth curved.The external diameter of each interior alligator 3 is in the boundary part minimum of the first diameter reducing part 34 and the second diameter reducing part 35.
The first processing department 142 of the first external tooth 14a is arranged on the outboard end in one of them the axial outside that is arranged in the first external tooth 14a.The first processing department 142 is offside in the processed part of the mode of radially inner side with more approaching one of them the axial outside of its flank of tooth.It is offside in radially inner side that, the flank of tooth of the first processing department 142 is processed to more approach the axial end portion (ora terminalis of the flank of tooth) of its flank of tooth.
The second processing department 162 of the second external tooth 16a is arranged on the outboard end in another the axial outside that is arranged in the second external tooth 16a.The second processing department 162 is offside in the processed part of the mode of radially inner side with more approaching another the axial outside of its flank of tooth.It is offside in radially inner side that, the flank of tooth of the second processing department 162 is processed to more approach the axial end portion (ora terminalis of the flank of tooth) of its flank of tooth.
The first diameter reducing part 34 and the first processing department 142 and the second processing department 162 are in the footpath of interior alligator 3 upwards not in opposite directions.The second diameter reducing part 35 and the first processing department 142 and the second processing department 162 are in the footpath of interior alligator 3 upwards not in opposite directions.The first diameter reducing part 34 the footpath of interior alligator 3 upwards with the first external tooth 14a in be not provided with the first processing department 142 end (axial inner end) in opposite directions.The second diameter reducing part 35 the footpath of interior alligator 3 upwards with the second external tooth 16a in be not provided with the second processing department 162 end (axial inner end) in opposite directions.
As described above, in first and second mode of execution, any one of them end that any one of them end of the first external tooth 14a is provided with the first processing department 142, the second external tooth 16a is provided with the second processing department 162.And, in each interior alligator 3, be respectively arranged with the first diameter reducing part 31(34 with position in opposite directions, the end that is not provided with the end of the first processing department 142 and is not provided with the second processing department 162 diametrically) and the second diameter reducing part 32(35).That is, to produce edge stress in order being suppressed between the first external tooth 14a and the second external tooth 16a and each interior alligator 3, in the first external tooth 14a, the second external tooth 16a and each interior alligator 3, required minimal position to be processed.For example illustrate as an example of the first mode of execution example, in each interior alligator 3, only have its two end part 31,32 to be subjected to crowning processing, intermediate portion 33 does not impose crowning processing.In addition,, in the first external tooth 14a and the second external tooth 14b, only have adjacent in the axial direction end (inner end of the inner end of the first external tooth 14a and the second external tooth 16a) to be mutually subjected to crowning processing.Accordingly, can suppress to produce edge stress between the first external tooth 14a and the second external tooth 16a and each interior alligator 3, can suppress again the increase of processing cost.
In addition,, in first and second mode of execution, compared with the gear drive of recording in Fig. 7 of patent documentation 1, except thering is the advantage that working position reduces by half, also there is processing dimension management and be easy to advantage.Particularly as described below.
In order to obtain the effect of crowning processing, need to make the trim amount (bulging amount or the amount of recess of trace direction) of trace direction (interior alligator 3 axially) in tolerance.In the gear drive of recording in Fig. 7 of patent documentation 1, the crowning operative position of interior alligator and the crowning operative position of external tooth are diametrically in opposite directions.In the case of thering is this kind diametrically working position toward each other, each working position is required to 1/2 machining tolerance of the tolerance of above-mentioned reduction value., in the case of having diametrically working position toward each other, each working position is required to 1/2 machining tolerance of the machining tolerance that in present embodiment, crowning working position required.If can not process with the machining tolerance of 1/2 of the tolerance of above-mentioned reduction value, need to expand the tolerance range of crowning amount, this reduces the effect of crowning sometimes.
And in first and second mode of execution, the crowning operative position of interior alligator and the crowning operative position of external tooth are diametrically not in opposite directions.Therefore, the first diameter reducing part 31(34 in interior alligator) and the second diameter reducing part 32(35) the machining tolerance tolerance that is above-mentioned reduction value.And, because machining tolerance is large, without the tolerance range that expands crowning amount.Thus, in first and second mode of execution, compared with the gear drive of recording in Fig. 7 of patent documentation 1, the program management with processing is easy to advantage.
In the first embodiment, the first processing department 142 is arranged on the end of the second external tooth 16a side in the axial two end part of the first external tooth 14a, the second processing department 162 is arranged on the end of the first external tooth 14a side in the axial two end part of the second external tooth 16a, the first diameter reducing part 31 is arranged on an axial wherein end of each interior alligator 3, and the second diameter reducing part 32 is arranged on axial the other end of each interior alligator 3.
In this structure, be provided with diameter reducing part 31,32 at the axial two end part of each interior alligator 3, with arranging compared with the situation of diameter reducing part 34,35 at axial intermediate portion of the second mode of execution, process more simple.Accordingly, can more effectively cut down finished cost.
Embodiments of the present invention have more than been described, but the present invention is not limited to these mode of executions, also can in the scope that does not depart from its purport, carries out various changes, improvement etc.
For example, in said embodiment, be the situation of curved shape of protruding laterally exemplified with the outer circumferential face (flank of tooth) of the first diameter reducing part and the second diameter reducing part, but be not limited thereto.The outer circumferential face of the first diameter reducing part and the second diameter reducing part can be also such as truncated cone shape etc.
In addition, in said embodiment, be more to approach the offside mode in radially inner side of axial end portion to be processed into the situation at the position of curved shape exemplified with the flank of tooth of the first processing department 142 and the second processing department 162, but be not limited thereto.The flank of tooth of the first processing department 142 and the second processing department 162 can be also for example in the upper plane of inclination with respect to axially for example tilting with acutangulate angle of the section shown in Fig. 3 (with the section of parallel to an axis).
In addition, in said embodiment, be arranged on the radially situation of central authorities exemplified with input shaft 8, but be not limited thereto.Input shaft 8 also can be arranged on from central radius vector to the position of departing from.
In addition, in said embodiment, the situation of multiple exemplified with being provided with (for example 3) bent axle, but also can adopt a for example bent axle to be arranged on the radially structure of central authorities.Now, can adopt cylindrical shell to be embedded in the structure of penetration hole 4d, penetration hole 4f, penetration hole 14b, penetration hole 16b.In this cylindrical shell, configure such as cable etc.
In said embodiment, bearing rotates with respect to urceolus.That is, can adopt fixed bearing and make the structure of urceolus with respect to bearing rotation, also can adopt fixed outer cylinder and make the structure of bearing with respect to urceolus rotation.
In addition, summarize above-mentioned concrete mode of execution.
Described gear drive comprises: urceolus, there is inner peripheral surface, and be provided with the vertically multiple cotter ways of extension along circumferential with appointed interval at this inner peripheral surface; Interior alligator, is disposed in each of described multiple cotter ways; Bent axle, has the first eccentric part and the second eccentric part that configure along described axially-aligned with the phase difference of specifying each other, and is provided in described urceolus and can centered by axle, rotates; The first external tooth gear, has the outer circumferential face that is provided with the first external tooth, and is installed in described the first eccentric part, and this first external tooth gear closes described the first external tooth and described internal tooth pin rodent on one side, on one side the swing rotary with the eccentric rotary interlock of described the first eccentric part; The second external tooth gear, has the outer circumferential face that is provided with the second external tooth, and is installed in described the second eccentric part, and this second external tooth gear closes described the second external tooth and described internal tooth pin rodent on one side, on one side the swing rotary with the eccentric rotary interlock of described the second eccentric part; And bearing, be passed by the swing rotary of described the first external tooth gear and described the second external tooth gear, with respect to described urceolus rotation.
Described the first external tooth has the first processing department in described axial any one of them end.It is offside in radially inner side that the flank of tooth of described the first processing department is processed to more to approach the axial end portion of this flank of tooth.Described the second external tooth has the second processing department in described axial any one of them end.It is offside in radially inner side that the flank of tooth of described the second processing department is processed to more to approach the axial end portion of this flank of tooth.
Each interior alligator has the first diameter reducing part and the second diameter reducing part.Described the first diameter reducing part be processed to be not provided with described the first processing department a side described the first external tooth end diametrically position in opposite directions along with towards axial and undergauge.Described the second diameter reducing part be processed to be not provided with described the second processing department a side described the second external tooth end diametrically position in opposite directions along with towards axial and undergauge.
In this structure, be provided with the first processing department in any one of them end of the first external tooth, be provided with the second processing department in any one of them end of the second external tooth.And, in each interior alligator, diametrically on position in opposite directions, be respectively arranged with the first diameter reducing part and the second diameter reducing part with the end that is not provided with the end of the first processing department and is not provided with the second processing department.That is, to produce edge stress in order being suppressed between the first external tooth and the second external tooth and each interior alligator, in each of the first external tooth, the second external tooth and each interior alligator, required minimal position to be processed.Accordingly, can be suppressed between the first external tooth and the second external tooth and each interior alligator and produce edge stress, can suppress again the increase of processing cost.
In described gear drive, described the first processing department is arranged on the end of described the second outside flanks in described the first external tooth, described the second processing department is arranged on the end of described the first outside flanks in described the second external tooth, described the first diameter reducing part is arranged on described one of them the axial end in each interior alligator, and described the second diameter reducing part is arranged on the described axial the other end in each interior alligator.
In this structure, be provided with diameter reducing part at the axial two end part of each interior alligator.According to this structure, compared with the situation of diameter reducing part is set at the axial intermediate portion of interior alligator, process more simply, therefore, can more effectively cut down finished cost.
Symbol description
1 gear drive
2 urceolus
2b cotter way
3 interior alligators
31,34 first diameter reducing parts
32,35 second diameter reducing parts
33 cylindrical portion
36 first cylindrical portion
37 second cylindrical portion
4 bearings
10 bent axles
10a the first eccentric part
10b the second eccentric part
14 first external tooth gears
14a the first external tooth
141 first external tooth main parts
142 first processing departments
16 second external tooth gears
16a the second external tooth
161 second external tooth main parts
162 second processing departments
20 transmit gear
Claims (2)
1. a gear drive, is characterized in that comprising:
Urceolus, has inner peripheral surface, is provided with multiple cotter ways of extension vertically at this inner peripheral surface along circumferential with appointed interval;
Interior alligator, is disposed in each of described multiple cotter ways;
Bent axle, has the first eccentric part and the second eccentric part that configure along described axially-aligned with the phase difference of specifying each other, and is provided in described urceolus and can centered by axle, rotates;
The first external tooth gear, has the outer circumferential face that is provided with the first external tooth, and is installed in described the first eccentric part, and this first external tooth gear closes described the first external tooth and described internal tooth pin rodent on one side, on one side the swing rotary with the eccentric rotary interlock of described the first eccentric part;
The second external tooth gear, has the outer circumferential face that is provided with the second external tooth, and is installed in described the second eccentric part, and this second external tooth gear closes described the second external tooth and described internal tooth pin rodent on one side, on one side the swing rotary with the eccentric rotary interlock of described the second eccentric part; And
Bearing, is passed by the swing rotary of described the first external tooth gear and described the second external tooth gear, with respect to described urceolus rotation, wherein,
Described the first external tooth has the first processing department in described axial any one of them end,
It is offside in radially inner side that the flank of tooth of described the first processing department is processed to more to approach the axial end portion of this flank of tooth,
Described the second external tooth has the second processing department in described axial any one of them end,
It is offside in radially inner side that the flank of tooth of described the second processing department is processed to more to approach the axial end portion of this flank of tooth,
Each interior alligator has the first diameter reducing part and the second diameter reducing part,
Described the first diameter reducing part be processed to be not provided with described the first processing department a side described the first external tooth end diametrically position in opposite directions along with towards axial and undergauge,
Described the second diameter reducing part be processed to be not provided with described the second processing department a side described the second external tooth end diametrically position in opposite directions along with towards axial and undergauge.
2. gear drive according to claim 1, is characterized in that:
Described the first processing department is arranged on the end of described the second outside flanks in described the first external tooth,
Described the second processing department is arranged on the end of described the first outside flanks in described the second external tooth,
Described the first diameter reducing part is arranged on described one of them the axial end in each interior alligator,
Described the second diameter reducing part is arranged on the described axial the other end in each interior alligator.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011233700A JP5798882B2 (en) | 2011-10-25 | 2011-10-25 | Gear transmission |
| JP2011-233700 | 2011-10-25 | ||
| PCT/JP2012/006577 WO2013061533A1 (en) | 2011-10-25 | 2012-10-15 | Gear transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103890452A true CN103890452A (en) | 2014-06-25 |
| CN103890452B CN103890452B (en) | 2016-06-22 |
Family
ID=48167389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280051928.1A Active CN103890452B (en) | 2011-10-25 | 2012-10-15 | Gear drive |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP5798882B2 (en) |
| KR (1) | KR101947216B1 (en) |
| CN (1) | CN103890452B (en) |
| DE (1) | DE112012004442B4 (en) |
| TW (1) | TW201335512A (en) |
| WO (1) | WO2013061533A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105398419A (en) * | 2014-09-04 | 2016-03-16 | 胡夫·许尔斯贝克和福斯特有限及两合公司 | Blocking Sprocket Lock |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6938332B2 (en) * | 2017-10-24 | 2021-09-22 | 住友重機械工業株式会社 | Eccentric swing type speed reducer |
| JP6898876B2 (en) * | 2018-02-28 | 2021-07-07 | 住友重機械工業株式会社 | Eccentric swing type speed reducer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05223142A (en) * | 1991-01-31 | 1993-08-31 | Sumitomo Heavy Ind Ltd | Double row type inscribing engagement epicyclic gear structure |
| JP4265834B2 (en) * | 1999-03-03 | 2009-05-20 | 住友重機械工業株式会社 | Inner and outer rollers having an intermeshing planetary gear structure and manufacturing method thereof |
| CN101571186A (en) * | 2008-04-29 | 2009-11-04 | 诺迈士科技有限公司 | Apparatus and method for improving radial stresses in a gear transmission mounting |
| JP2009293650A (en) * | 2008-06-03 | 2009-12-17 | Nabtesco Corp | Eccentric oscillation type gear device |
| US20100261572A1 (en) * | 2009-04-14 | 2010-10-14 | Ims Gear Gmbh | Gear mechanism, particularly planet gear with a flange and a ring gear |
| CN101929526A (en) * | 2009-06-26 | 2010-12-29 | 住友重机械工业株式会社 | epicycle reduction gear |
-
2011
- 2011-10-25 JP JP2011233700A patent/JP5798882B2/en active Active
-
2012
- 2012-10-15 CN CN201280051928.1A patent/CN103890452B/en active Active
- 2012-10-15 WO PCT/JP2012/006577 patent/WO2013061533A1/en active Application Filing
- 2012-10-15 DE DE112012004442.8T patent/DE112012004442B4/en active Active
- 2012-10-15 KR KR1020147013672A patent/KR101947216B1/en active IP Right Grant
- 2012-10-23 TW TW101139013A patent/TW201335512A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05223142A (en) * | 1991-01-31 | 1993-08-31 | Sumitomo Heavy Ind Ltd | Double row type inscribing engagement epicyclic gear structure |
| JP4265834B2 (en) * | 1999-03-03 | 2009-05-20 | 住友重機械工業株式会社 | Inner and outer rollers having an intermeshing planetary gear structure and manufacturing method thereof |
| CN101571186A (en) * | 2008-04-29 | 2009-11-04 | 诺迈士科技有限公司 | Apparatus and method for improving radial stresses in a gear transmission mounting |
| JP2009293650A (en) * | 2008-06-03 | 2009-12-17 | Nabtesco Corp | Eccentric oscillation type gear device |
| US20100261572A1 (en) * | 2009-04-14 | 2010-10-14 | Ims Gear Gmbh | Gear mechanism, particularly planet gear with a flange and a ring gear |
| CN101929526A (en) * | 2009-06-26 | 2010-12-29 | 住友重机械工业株式会社 | epicycle reduction gear |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105398419A (en) * | 2014-09-04 | 2016-03-16 | 胡夫·许尔斯贝克和福斯特有限及两合公司 | Blocking Sprocket Lock |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201335512A (en) | 2013-09-01 |
| DE112012004442B4 (en) | 2023-06-07 |
| CN103890452B (en) | 2016-06-22 |
| JP5798882B2 (en) | 2015-10-21 |
| DE112012004442T5 (en) | 2014-07-10 |
| KR101947216B1 (en) | 2019-02-12 |
| WO2013061533A1 (en) | 2013-05-02 |
| TWI560380B (en) | 2016-12-01 |
| KR20140084239A (en) | 2014-07-04 |
| JP2013092179A (en) | 2013-05-16 |
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