CN204739168U - Gear drive - Google Patents
Gear drive Download PDFInfo
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- CN204739168U CN204739168U CN201520440143.4U CN201520440143U CN204739168U CN 204739168 U CN204739168 U CN 204739168U CN 201520440143 U CN201520440143 U CN 201520440143U CN 204739168 U CN204739168 U CN 204739168U
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- gear
- support
- roller bearing
- limiting member
- bent axle
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Abstract
The utility model discloses realize the gear drive with simple structure supporting bent axle. Bent axle (12) of gear drive (100) are supported in support construction (2). Support construction (2) are including first support (2a) and second support (2c). Bent axle (12) have from the first axle part (16) of the eccentric body (18) extension and the second axle part (38) of extending from the eccentric body (36). Support in first support (2a) with the help of the 1st cylindrical roller bearing (22) the first axle part (16). Support in second support (2c) with the help of the 2nd cylindrical roller bearing (32) the second axle part (38). Second support (2c) is passed in the second axle part (38). In gear drive (100), be fixed with a pair of restriction component (42, 44) of being used for restricting rotation axis (40) the direction removal of bent axle (12) edge on the second axle part (38). Second support (2c) configuration is between a pair of restriction component (42, 44).
Description
Technical field
Subject description discloses a kind of technology relevant to gear drive.
Background technique
Be known to a kind of gear drive comprising the eccentric rotary gear carrying out eccentric rotary and the rotating gear be meshed with eccentric rotary gear.In this gear drive, utilize the bent axle with eccentric body that eccentric rotary gear eccentricity is rotated.Bent axle is supported in gear carrier.Two plates (hereinafter referred to as the first plate, the second plate) interfix with spaced apart and relative state and are formed by gear carrier.In the gear drive of patent documentation 1, between bent axle and gear carrier, be configured with roller bearing, limit moving radially of bent axle.In addition, by installing two packing rings on bent axle, and each packing ring is contacted with each self-corresponding first plate or the second plate, thus limit moving axially of bent axle.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2008-202764 publication
Model utility content
The problem that model utility will solve
As mentioned above, in the gear drive of patent documentation 1, by making packing ring contact with the second plate with the first plate, thus limit moving axially of bent axle.Such as, when the surface of the first plate and the air spots of the second plate capable, exist and the situation of local load applied to bent axle, gear carrier.Therefore, in the gear drive of patent documentation 1, need processing, the assembling of carrying out gear carrier (the first plate and the second plate) in the mode that the surface of the first plate is parallel with the surface of the second plate.That is, for the gear drive of patent documentation 1, the machining accuracy of the first plate and these two parts of the second plate, assembly precision can affect the rotation of bent axle.Subject description discloses a kind of technology solved the problem, this technology realizes carrying out the gear drive of supporting crankshaft with simple structure than ever.
For the scheme of dealing with problems
The gear drive of the first aspect disclosed in this specification comprises bent axle, eccentric rotary gear, rotating gear and the support member with eccentric body.Eccentric rotary gear coordinates with eccentric body, and along with the rotation of bent axle eccentric rotary.Rotating gear is meshed with eccentric rotary gear, and has the number of teeth different from the number of teeth of eccentric rotary gear.Support member carries bent axle.Support member comprises the first support and the second support.First support and the second support are oppositely disposed at spaced intervals, and fix by columnar part.Bent axle comprise from eccentric body to the side in spin axis direction extend the first axle part and from eccentric body to the opposite side in spin axis direction extend the second axle part.The first axle part is supported on the first support by the first roller bearing.The second axle part is supported on the second support by the second roller bearing.In addition, the second axle part is through the second support.In this gear drive, the second axle part is fixed with for limiting a pair limiting member of bent axle to the movement of spin axis direction.In addition, the second support is configured between a pair limiting member.
Second aspect of the present utility model provides the gear drive according to aforementioned first aspect, the first support and described columnar part integral, the second support is dull and stereotyped.
The third aspect of the present utility model provides the gear drive according to aforementioned first or second aspect, and a pair limiting member is all packing rings.
Fourth aspect of the present utility model provides the gear drive according to aforementioned first or second aspect, in a pair limiting member, to be positioned at than the second support by the limiting member of position on described eccentric side be packing ring, the limiting member being positioned at the side contrary with described eccentric body for the second support is the input gear for making crankshaft rotating.
5th aspect of the present utility model provides according to the gear drive in aforementioned first to fourth aspect described in either side, and moving axially of the second roller bearing is limited by a pair limiting member.
In said gear transmission device, the second support is configured between a pair limiting member.In other words, a pair limiting member clamps the positive and negative of the second support.Said gear transmission device clamps the second support by utilizing a pair limiting member, thus limits moving axially of bent axle.When said gear transmission device, as long as the positive and negative of the second support is parallel, power bent axle and support member being applied to local just can be prevented.That is, as long as make the front of the second support parallel with reverse side, the axially mounting of bent axle can just be carried out when not being subject to the affecting of assembly precision of the first support and the second support.In other words, can bent axial positioning precision be controlled by parts instead of be controlled by two parts.
In addition, for " rotating gear ", when observing gear drive from outside, rotating gear self not necessarily to carry out rotation.As long as rotating gear is relative to the relative rotation of eccentric rotary gear.In gear drive disclosed in this specification, there is following situation: rotating gear is static when observing gear drive from outside, and eccentric rotary gear carries out eccentric rotary and carries out rotation relative to rotating gear.That is, " rotating gear carries out rotation relative to eccentric rotary gear " also comprises rotating gear self not from transferring to carry out rotation due to eccentric rotary gear, thus the rotating gear mode that rotate relative to eccentric rotary gear.
Accompanying drawing explanation
Fig. 1 represents the sectional view of the gear drive of the first embodiment.
Fig. 2 represents the sectional view of the II-II line along Fig. 1.
Fig. 3 represents the enlarged view of the part of being surrounded by the dotted line III of Fig. 1.
Fig. 4 represents the enlarged view of the part of being surrounded by the dotted line IV of Fig. 3.
Fig. 5 represents figure during top view the second plate.
Fig. 6 represents planimetric map when observing the second plate from the opposition side of Fig. 5.
Fig. 7 represents figure during top view the 4th packing ring.
Fig. 8 represents figure during top view input gear.
Fig. 9 represents the sectional view of the gear drive of the second embodiment.
Description of reference numerals
2: support member; 12: bent axle; 16: the first axle part; 18: eccentric body; 22: the first roller bearings; 26: eccentric rotary gear; 28: eccentric rotary gear; 32: the second roller bearings; 36: eccentric body; 38: the second axle part; 42: limiting member; 44: limiting member; 56: rotating gear; 100: gear drive.
Embodiment
Below, several technical characteristicss of the gear drive disclosed in this specification are described.In addition, following item individually possesses skills practicability.
Can be that gear drive comprises eccentric rotary gear and the bent axle for making this eccentric rotary gear carry out eccentric rotary.Can be, bent axle has eccentric body.Can be that eccentric body is positioned at the middle along spin axis direction of bent axle.More particularly, Ke Yishi, bent axle have from eccentric body to the side in spin axis direction extend the first axle part and from eccentric body to the opposite side in spin axis direction extend the second axle part.Eccentric body can be one, also can be two or more.When bent axle has multiple eccentric body, each eccentric body also can be different relative to the eccentric direction of the spin axis of bent axle.In addition, Ke Yishi, when bent axle has multiple eccentric body, the eccentric body that the first axle part autogamy is placed in an end in spin axis direction extends, and the eccentric body that the second axle part autogamy is placed in the other end in spin axis direction extends.
Can be that gear drive has the support member for supporting crankshaft.Can be that bent axle is supported on support member in the mode that can rotate.Can be that bent axle utilizes a pair roller bearing to be supported on support member.Such as, bent axle utilizes the first roller bearing of being configured between the first axle part and support member and the second roller bearing be configured between the second axle part and support member to be supported on support member.In this case, Ke Yishi, eccentric body is between the first roller bearing and the second roller bearing.Can be, bent axle has input gear.Can be that input gear is fixed in bent axle in the outside of a pair roller bearing (the first roller bearing, the second roller bearing).Can be that, when the second axle part is fixed with input gear, the second axle part is through support member.
Can be that support member comprises the first support, the second support and columnar part.Can be that the first support and the second support are oppositely disposed at spaced intervals.Can be that the first support and the second support are fixed by columnar part.Can be that the first support and/or the second support are dull and stereotyped.In addition, in this manual, " flat board " refer to obverse and reverse at least local place be parallel.That is, " flat board " not necessarily whole front and whole reverse side be uniform planar, as long as parallel at least partially at least partially with reverse side in its front, such as, the mode that front and/or reverse side are formed groove etc. also belongs to " flat board ".
Columnar part also can with the first support or the second support integral.Such as, Ke Yishi, the first support and columnar part integral, the second support is dull and stereotyped.Also can be, the second support and columnar part integral, the first support is dull and stereotyped.Can be that the first support carries the first axle part of bent axle, the second support carries the second axle part of bent axle.Can be that the first axle part is supported on the first support by the first roller bearing.In addition, Ke Yishi, the second axle part is supported on the second support by the second roller bearing.Can be that the second axle part passes and extends to the outside of the second support from the through hole of the second support.That is, Ke Yishi, the second axle part extends to the outside of support member from the inside (between the first support and the second support) of support member.In addition, Ke Yishi, the first axle part is left in the through hole of the first support.In other words, Ke Yishi, the end of the first axle part is positioned at the through hole of the first support.
Can be, gear drive comprises rotating gear, and this rotating gear is meshed with eccentric rotary gear, and has the number of teeth different from the number of teeth of eccentric rotary gear.Can be that rotating gear is meshed with eccentric rotary gear, while relatively rotate relative to eccentric rotary gear.Also can be that eccentric rotary gear is external gear, rotating gear be internal gear.Or Ke Yishi, eccentric rotary gear is internal gear, and rotating gear is external gear.Also can be that external gear is meshed with internal gear while carry out eccentric rotary.In this case, internal gear is relative to external gear rotation.Also can be that internal gear is meshed with external gear while carry out eccentric rotary.In this case, external gear is relative to internal gear rotation.
Can be that, when external gear carries out the type of eccentric rotary, the housing of gear drive doubles as internal tooth component (part for internal gear).That is, Ke Yishi, internal gear is formed at the inner circumferential of housing.In this case, Ke Yishi, internal gear comprises internal tooth component and is inserted into the cylindrical element in the groove of the inner peripheral surface being located at internal tooth component.More particularly, Ke Yishi, internal gear is formed by the groove and the cylindrical structural member be inserted in this groove being formed at internal tooth component inner peripheral surface.Can be configured with bent axle, external gear in the inner side of housing and bent axle carried out the support member (gear carrier) that supports in the mode that can rotate.
Can be that eccentric rotary gear coordinates with the eccentric body of bent axle, and along with the rotation of bent axle eccentric rotary.Can be configured with three cylindrical roller bearing between the eccentric body and eccentric rotary gear of bent axle.In this case, Ke Yishi, on the spin axis direction of bent axle, three cylindrical roller bearing is configured between the first roller bearing and the second roller bearing.Can be that input gear is fixed in bent axle (the second axle part) in the outside of a pair roller bearing (the first roller bearing, the second roller bearing).
Can be that the first limiting member is configured between the first roller bearing and three cylindrical roller bearing.Can be that the first limiting member is installed on the first axle part of bent axle.Can be that the axial end portion of the first roller bearing and the axial end portion of three cylindrical roller bearing contact with the first limiting member.Can be that the second limiting member is configured between the second roller bearing and three cylindrical roller bearing.Can be that the second limiting member is installed on the second axle part of bent axle.Can be that the axial end portion of the second roller bearing contacts with the second limiting member with the axial end portion of three cylindrical roller bearing.
Can be that the 3rd limiting member is fixed in the first axle part in side contrary with the first limiting member for the first roller bearing.In this case, the first roller bearing is configured between the first limiting member and the 3rd limiting member.Can be, the situation utilizing the first limiting member and the 3rd limiting member to limit the first roller bearing to exert a force to other roller bearings (three cylindrical roller bearing).In other words, can be, position between first limiting member and the 3rd limiting member is fixed to, even if towards the masterpiece of the first limiting member movement, for the first roller bearing, the first roller bearing exerts a force to the first limiting member, and the first roller bearing does not also exert a force to three cylindrical roller bearing.
Can be that the 4th limiting member is fixed in the second axle part in side contrary with the second limiting member for the second roller bearing.In this case, the second roller bearing is configured between the second limiting member and the 4th limiting member.Can be utilize the second limiting member and the 4th limiting member to limit the second roller bearing and other roller bearings (three cylindrical roller bearing) are exerted a force.In other words, can be, position between second limiting member and the 4th limiting member is fixed to, even if towards the masterpiece of the second limiting member movement, for the second roller bearing, the second roller bearing exerts a force to the second limiting member, and the second roller bearing does not also exert a force to three cylindrical roller bearing.Similarly, can be, position between second limiting member and the 4th limiting member is fixed to, even if towards the masterpiece of the second limiting member movement, for three cylindrical roller bearing, three cylindrical roller bearing exerts a force to the second limiting member, and three cylindrical roller bearing is not also to the second roller bearing force.
Can be that the second limiting member and the 4th limiting member are for limiting a pair limiting member of bent axle to the movement of spin axis direction.In this case, Ke Yishi, the second support is configured between the second limiting member and the 4th limiting member.Specifically, Ke Yishi, the surface contact by the first support side of the second limiting member and the second support, the surface contact being positioned at the side contrary with the first support of the 4th limiting member and the second support.In other words, Ke Yishi, the second limiting member and the 4th limiting member hold the second support.Can be that by clamping the second support by the second limiting member and the 4th limiting member, thus restriction bent axle is to moving axially.
Can be that the first limiting member ~ the 4th limiting member is the parts of ring-type.Can be that the first limiting member ~ the 4th limiting member is such as packing ring.Can be that the external diameter of the first limiting member is greater than the external diameter of the first roller bearing.In addition, Ke Yishi, the outer rim of the first limiting member is positioned at the inner peripheral surface position in the outer part than three cylindrical roller bearing.Can be that, when observing bent axle from spin axis direction, eccentric body is positioned at the inner side of the outer rim of the first limiting member.Can be that the external diameter of the second limiting member is greater than the external diameter of the second roller bearing.In addition, Ke Yishi, the outer rim of the second limiting member is positioned at the inner peripheral surface position in the outer part than three cylindrical roller bearing.Can be that, when observing bent axle from spin axis direction, eccentric body is positioned at the inner side of the outer rim of the second limiting member.In addition, Ke Yishi, the external diameter of the 3rd limiting member is less than the external diameter of the first roller bearing.In addition, Ke Yishi, the external diameter of the 4th limiting member is greater than the external diameter of the second roller bearing.In addition, Ke Yishi, when input gear is fixed in the second axle part in the outside of both the first roller bearing and the second roller bearing, input gear is the 4th limiting member.
[embodiment]
(the first embodiment)
See figures.1.and.2, the basic structure of gear drive 100 is described.Fig. 1 represents the longitudinal section (sectional view along axis 46 of gear drive 100) of gear drive 100.Fig. 2 represents the sectional elevation (sectional view along the line orthogonal with axis 46 of gear drive 100) of gear drive 100.Gear drive 100 comprises internal gear 56, gear carrier 2, bent axle 12 and two external gears 26,28.Internal gear 56 is examples for rotating gear, and gear carrier 2 is examples for support member, and external gear 26,28 is examples for eccentric rotary gear.
Internal gear 56 comprises housing 54 and interior alligator 52.Internal gear 56 is formed by the inner circumferential multiple interior alligator 52 of configuration at housing 54.Interior alligator 52 in cylindric, and is configured at the inner peripheral surface of housing 54.Gear carrier 2 is supported on housing 54 by pair of bearings 50 in the mode that can rotate.Pair of bearings 50 limits gear carrier 2 moving axially and moving radially relative to housing 54.In gear drive 100, employ angular contact ball bearing as pair of bearings 50.Interior alligator 52 is configured between pair of bearings 50.
Gear carrier 2 comprises the first plate 2a and the second plate 2c.First plate 2a and the second plate 2c is oppositely disposed at spaced intervals.First plate 2a has columnar part 2b.Columnar part 2b and the first plate 2a is integral, and extends from the first plate 2a towards the second plate 2c.Second plate 2c is dull and stereotyped.Columnar part 2b and the second plate 2c utilizes bolt 51 to fix.That is, the first plate 2a and the second plate 2c is fixed.By using locating stud 49 to make the position of columnar part 2b and the aligned in position of the second plate 2c, and bolt 51 is anchored on columnar part 2b, thus the first plate 2a and the second plate 2c is fixed.In addition, the first plate 2a and the second plate 2c can dismounting.First plate 2a is an example of the first support, and the second plate 2c is an example of the second support.
Be provided with through hole 2d in the central authorities of the first plate 2a, cover 4 is installed on the end of through hole 2d.Through hole 2f is provided with from the position of central offset at the first plate 2a.A part (the first axle part 16) for bent axle 12 is positioned at through hole 2f.Cover 14 is installed on the end of through hole 2f.Oil sealing 58 is provided with between the first plate 2a and housing 54.Through hole 2e is provided with in the central authorities of the second plate 2c.Through hole 2g is provided with from the position of central offset at the second plate 2c.Through hole 2f is coaxial with through hole 2g.A part (the second axle part 38) for bent axle 12 extends to the outside of the second plate 2c through through hole 2g.Second plate 2c is also provided with the bolt hole 51a passed for bolt 51, the pin-and-hole 49a passed for locating stud 49.
Bent axle 12 is supported on gear carrier 2 in the mode that can rotate by a pair roller bearing (roller bearing 22, roller bearing 32).Bent axle 12 comprises input gear 34 and two eccentric bodies 18,36.The eccentric direction of eccentric body 18 and the eccentric direction of eccentric body 36 are symmetrical relative to the spin axis 40 of bent axle 12.The first axle part 16 extends to the side in spin axis 40 direction from eccentric body 18.The end of the first axle part 16 is positioned at through hole 2f.The second axle part 38 extends to the opposite side in spin axis 40 direction of bent axle 12 from eccentric body 36.The second axle part 38 is through through hole 2g, and the end of the second axle part 38 is positioned at the outside of gear carrier 2.
The first axle part 16 is supported on the first plate 2a in the mode that can rotate by roller bearing 22.The second axle part 38 is supported on the second plate 2c in the mode that can rotate by roller bearing 32.Eccentric body 18,36 is configured between a pair roller bearing 22,32.Roller bearing 22 is examples for the first roller bearing, and roller bearing 32 is examples for the second roller bearing.In addition, roller bearing 22,32 is also referred to as needle bearing sometimes.
Input gear 34 is fixed with at the second axle part 38.Input gear 34 is fixed in the second axle part 38 in the outside of a pair roller bearing 22,32.In other words, input gear 34 is fixed in the second axle part 38 in side contrary with eccentric body 36 for roller bearing 32.Input gear 34 is installed in the second axle part 38 in the outside of gear carrier 2, can carry out dismounting relative to the second axle part 38.The output gear 48 of motor (omitting diagram) engages with input gear 34.
External gear 26 coordinates with eccentric body 18 by roller bearing 24.In addition, external gear 28 coordinates with eccentric body 36 by roller bearing 30.Eccentric body 18,36 can rotate relative to external gear 26,28.External gear 26,28 along with the rotation of bent axle 12 while be meshed with internal gear 56 while carry out eccentric rotary around axis 46.External gear 26 and external gear 28 carry out bias symmetrically relative to axis 46.
First packing ring 6 is configured between roller bearing 22 and roller bearing 24.Second packing ring 44 is configured between roller bearing 32 and roller bearing 30.3rd packing ring 10 is fixed in the first axle part 16 in side contrary with eccentric body 18 for roller bearing 22.4th packing ring 42 is fixed in the second axle part 38 in side contrary with eccentric body 36 for roller bearing 32.Packing ring 6,44,10 and 42 and spin axis 40 arranged coaxial.The detailed content of packing ring 6,44,10 and 42 as described later.
If transmit the torque of motor to input gear 34, then bent axle 12 rotates around spin axis 40.If bent axle 12 rotates, then eccentric body 18,36 carries out eccentric rotary around spin axis 40.Along with the eccentric rotary of eccentric body 18,36, external gear 26,28 is meshed while carry out eccentric rotary with internal gear 56.External gear 26,28 carries out eccentric rotary around the axis 46 of gear drive 100.External gear 26 and external gear 28 carry out eccentric rotary symmetrically relative to axis 46.The number of teeth of external gear 26,28 is different from the number of teeth (quantity of interior alligator 52) of internal gear 56.Therefore, if external gear 26,28 carries out eccentric rotary, then the number of teeth corresponded between external gear 26,28 and internal gear 56 is poor, and internal gear 56 carries out rotation relative to external gear 26,28.External gear 26,28 is supported on gear carrier 2 by bent axle 12.In addition, internal gear 56 is formed at the inner circumferential of housing 54.Therefore, if external gear 26,28 carries out eccentric rotary, then housing 54 carries out rotation relative to gear carrier 2.
In addition, housing 54 and gear carrier 2 are the relations rotated relative to one another when actuation gear transmission device 100.Therefore, if gear carrier 2 to be fixed on base portion (omitting diagram), and subject parts (by rotating member) is fixed on housing 54, then, when actuation gear transmission device 100, housing 54 carries out rotation.In addition, if housing 54 is fixed on base portion, and fix the other side's component on gear carrier 2, then, when actuation gear transmission device 100, gear carrier 2 carries out rotation.
With reference to Fig. 3, the structure around bent axle 12 is described.Roller bearing 22 comprises retainer 22a and roller (rolling element) 22b.Roller bearing 32 comprises retainer 32a and roller 32b.Roller bearing 24 comprises retainer 24a and roller 24b.Roller bearing 30 comprises retainer 30a and roller 30b.Roller bearing 22 is configured between the first plate 2a and the first axle part 16.Roller bearing 32 is configured between the second plate 2c and the second axle part 38.Roller bearing 24 is configured between eccentric body 18 and external gear 26.Roller bearing 30 is configured between eccentric body 36 and external gear 28.
First packing ring 6 and the 3rd packing ring 10 are installed in the first axle part 16.First packing ring 6 contacts with eccentric body 18.First packing ring 6 utilizes roller bearing 22 and eccentric body 18 to limit its movement to spin axis 40 direction.In addition, the first packing ring 6 does not contact with the first plate 2a.Back-up ring 9 is fixed on the first axle part 16.3rd packing ring 10 utilizes roller bearing 22 and back-up ring 9 to limit its movement to spin axis 40 direction.That is, the first packing ring 6, roller bearing 22 and the 3rd packing ring 10 utilize eccentric body 18 and back-up ring 9 to limit their movements to spin axis 40 direction.
The external diameter L6 of the first packing ring 6 is greater than the external diameter L22 of roller bearing 22.Therefore, the retainer 22a of roller bearing 22 can contact with the surface of the first packing ring 6.In addition, when top view (observing along spin axis 40 direction) the first packing ring 6, the outer rim of the first packing ring 6 is positioned at the outer rim position in the outer part than eccentric body 18.Therefore, the retainer 24a of roller bearing 24 can contact with the first packing ring 6 with the surface of contrary side, the surface contacted with retainer 22a.In other words, the first packing ring 6 prevents roller bearing 22 from contacting with roller bearing 24.More particularly, the first packing ring 6 is utilized to prevent from contacting between the end in the bearing central axis direction of retainer 22a and the end in the bearing central axis direction of retainer 24a.
The external diameter L10 of the 3rd packing ring 10 is less than the external diameter L22 of roller bearing 22.Therefore, the 3rd packing ring 10 does not contact with the first plate 2a.The retainer 22a of roller bearing 22 can be made to contact with the 3rd packing ring 10.As mentioned above, both the first packing ring 6 and the 3rd packing ring 10 and located by eccentric body 18 and back-up ring 9 between the first axle part 16.Even if make roller bearing 22 to the masterpiece of bearing central axis direction movement for roller bearing 22, also can prevent this power from putting on roller bearing 24.More particularly, by preventing retainer 22a from contacting with retainer 24a, the end that can prevent from power from concentrating acting on retainer 22a and/or the end of retainer 24a.Such as, if retainer 22a contacts with retainer 24a, then exist and make the power of roller bearing 22,24 movement concentrate the situation acting on retainer 22a, 24a.Its result, retainer 22a, 24a are out of shape, thus may cause the situation that the spin axis of roller 22b, 24b offsets along with the distortion of retainer 22a, 24a.By preventing retainer 22a from contacting with retainer 24a, retainer 22a, 24a can be prevented to be out of shape, the rotational axis offset of roller 22b, 24b can be prevented.
Second packing ring 44 and the 4th packing ring 42 are installed on the second axle part 38.Second packing ring 44 contacts with eccentric body 36.Second packing ring 44 utilizes roller bearing 32 and eccentric body 36 to limit its movement to spin axis 40 direction.Second packing ring 44 contacts with the second plate 2c with the 4th packing ring 42.More particularly, the second packing ring 44 contacts with the surface by the first plate 2a side of the second plate 2c, and the 4th packing ring 42 contacts with the surface being positioned at the side contrary with the first plate 2a of the second plate 2c.Second packing ring 44 and the 4th packing ring 42 are examples for a pair limiting member.
Input gear 34 contacts with the surface of the 4th packing ring 42 in the side contrary with the first plate 2a of the second plate 2c.In other words, the 4th packing ring 42 is clamped by the second plate 2c and input gear 34.Input gear 34 spline is incorporated into the groove 62 be located on the second axle part 38.In addition, back-up ring 64 is fixed in the second axle part 38 in side contrary with the 4th packing ring 42 for input gear 34.4th packing ring 42 and input gear 34 are clamped by back-up ring 64 and the second plate 2c and limit and move to spin axis 40 direction.Second packing ring 44, roller bearing 32, the 4th packing ring 42 and input gear 34 utilize eccentric body 36 and back-up ring 64 to limit movement to spin axis 40 direction.In addition, the external diameter L44 of the second packing ring 44 is equal with the external diameter L42 of the 4th packing ring 42.External diameter L44 and external diameter L42 is greater than the external diameter L32 of the second roller bearing 32.
As mentioned above, both the second packing ring 44 and the 4th packing ring 42 and positioned by eccentric body 36 and back-up ring 64 between the second axle part 38.Therefore, even if make roller bearing 32 to the masterpiece of bearing central axis direction movement for roller bearing 32, also can prevent this power from putting on roller bearing 30.More particularly, by preventing retainer 32a from contacting with retainer 30a, the end that can prevent from power from concentrating acting on retainer 32a and/or the end of retainer 30a.By preventing retainer 32a from contacting with retainer 30a, retainer 32a, 30a can be prevented to be out of shape, thus the rotational axis offset of roller 32b, 30b can be prevented.
Flange 60 is provided with at the central part (between eccentric body 18 and eccentric body 36) of bent axle 12.Flange 60 is in the circle coaxial with spin axis 40.Flange 60 is integral with bent axle 12.When top view flange 60, the outer rim of flange 60 is positioned at the outer rim position in the outer part of outer rim than eccentric body 18 and eccentric body 36.The retainer 24a of roller bearing 24, the retainer 30a of roller bearing 30 can contact with the surface of flange 60.
With reference to Fig. 4 ~ Fig. 8, the structure around the second axle part 38 is described.In addition, Fig. 5 is figure when observing the second plate 2c along arrow A 1 direction of Fig. 1.Fig. 6 is figure when observing the second plate 2c along arrow A 2 direction of Fig. 1.In addition, Fig. 8 is figure when observing input gear 34 along arrow A 1 direction.
As shown in Figure 4 and Figure 5, the surface by the second packing ring 44 side of the second plate 2c is provided with multiple groove 70 (70a, 70b, 70c and 70d).Groove 70a extends from through hole 2g towards the central authorities of the second plate 2c, and is coupled together by through hole 2g and through hole 2e.Groove 70b extends from through hole 2g towards the longitudinal end of the second plate 2c, and is coupled together the outside of through hole 2g and the second plate 2c.Groove 70c, 70d extend from through hole 2g towards the direction with the line orthogonal central link at the center of through hole 2g and through hole 2e got up.In addition, groove 70c and groove 70d extends in the opposite directions to each other.Groove 70a ~ groove 70d is respectively provided with two on the surface of the second plate 2c.Two groove 70a tilt symmetrically relative to the line linked up with beeline by through hole 2g and through hole 2e respectively.Two groove 70b tilt symmetrically relative to the line longitudinal end of through hole 2g and the second plate 2c linked up with beeline respectively.Two groove 70c tilt symmetrically relative to the line with the line orthogonal central link at the center of through hole 2g and through hole 2e got up.Similarly two groove 70d tilt symmetrically relative to the line with the line orthogonal central link at the center of through hole 2g and through hole 2e got up.
The part that second packing ring 44 be not provided with groove 70 contacts with the second plate 2c, does not contact in the part being provided with groove 70 with the second plate 2c.In other words, be provided with the part of groove 70, between the second packing ring 44 and the second plate 2c, be provided with gap.In addition, as shown in Figure 5, groove 70 is crossed the outer rim of the second packing ring 44 and extends from through hole 2g.Therefore, can not be airtight by the second packing ring 44 in through hole 2g, but be communicated with the outside of through hole 2g (in through hole 2e, the second plate 2c and the gap between external gear 28, space etc. around the bearing 50 that supports the second plate 2c).Oiling agent can be made (to be configured with in the space of roller bearing 32) in the outside of through hole 2g and through hole 2g mobile.Can suppress roller bearing 32 that rupture of oil film occurs.
With reference to Fig. 6, groove 72 is described.Groove 72 shape is identical in fact with groove 70.Therefore, about the feature of groove 72, there is the situation omitting the explanation repeated with groove 70.Multiple groove 72 (72a, 72b, 72c and 72d) is located at the surface by the 4th packing ring 42 side of the second plate 2c.Through hole 2g and through hole 2e couples together by groove 72a, and the end of through hole 2g and the second plate 2c couples together by groove 72b.Groove 72a ~ groove 72d is respectively provided with two on the surface of the second plate 2c.The part that 4th packing ring 42 be not provided with groove 72 contacts with the second plate 2c, does not contact in the part being provided with groove 72 with the second plate 2c.Be provided with the part of groove 72, between the 4th packing ring 42 and the second plate 2c, be provided with gap.Can not be airtight by the 4th packing ring 42 in through hole 2g, but can be communicated with the outside of through hole 2g (in through hole 2e, the second plate 2c and the gap between input gear 34, space etc. around the bearing 50 that supports the second plate 2c).
As shown in figs. 4 and 7, the 4th packing ring 42 is provided with three through hole 42a.Three through hole 42a equally spaced configure in the circumference of the 4th packing ring 42.As shown in Figure 4 and Figure 8, input gear 34 is provided with groove 74.Groove 74 is circumferentially with a circle along input gear 34.Through hole 42a is connected with groove 74 with through hole 2g.Three through hole 34a are provided with in groove 74.Three through hole 34a equally spaced configure in the circumference of input gear 34.In addition, the teeth portion 34b be meshed with spline 62 is provided with in the central authorities of input gear 34.Through hole 42a, 34a are connected by groove 74.Therefore, oiling agent can move inside and outside through hole 2g.
The advantage of gear drive 100 is described.In gear drive 100, by making the second packing ring 44 contact with the second plate 2c with the 4th packing ring 42, thus restriction bent axle 12 moves vertically.The axis of bent axle 12 limits and does not rely on the processing of the first plate 2a and the second plate 2c, assembled state.That is, as long as the front of the second plate 2c is parallel with reverse side (being provided with the face of the second packing ring 44 and the face being provided with the second packing ring 42), just moving axially of bent axle 12 can be limited.As mentioned above, the second plate 2c is dull and stereotyped.Compared with being processed in the relative face of two parts (the first plate 2a and the second plate 2c), assembling parallel way, it is very easy that the positive and negative of flat board is processed as parallel way.Compared with gear transmission gear drive in the past, can only simply to process the axis restriction carrying out bent axle 12.
Other advantages of gear drive 100 are described.Roller bearing 22,24,30 and 32 does not apply power to other roller bearings.Rotate therefore, it is possible to prevent roller bearing 22,24,30 and 32 from being hindered by other roller bearings.More particularly, gear drive 100 can prevent from power from concentrating acting on roller bearing 22,24,30 and 32 respective retainer 22a, 24a, 30a and 32a.
First packing ring 6 is located relative to the first axle part 16.Therefore, even if make roller bearing 24 along the masterpiece of bearing central axis direction movement for roller bearing 24, also can prevent this power from putting on roller bearing 22.Similarly, the second packing ring 44 is located relative to the second axle part 38.Therefore, even if make roller bearing 30 along the masterpiece of bearing central axis direction movement for roller bearing 30, also can prevent this power from putting on roller bearing 32.In addition, because flange 60 and bent axle 12 are integral, therefore, it is possible to prevent from making roller bearing 24 put on roller bearing 30 along the power of bearing central axis direction movement, can prevent from making roller bearing 30 put on roller bearing 24 along the power of bearing central axis direction movement.
Input gear 34 is installed in bent axle 12 (the second axle part 38) in the outside of a pair roller bearing 22,32.Therefore, it is possible to input gear 34 is unloaded from bent axle 12 in gear carrier 2 (the first plate 2a and the second plate 2c) unseparated situation.In addition, when replacing input gear 34 and such as installing the diameter input gear larger than the diameter of input gear 34, the main structure to gear drive (internal gear 56, external gear 26,28, bent axle 12 etc.) is not needed to change.
(the second embodiment)
With reference to Fig. 9, gear drive 200 is described.Gear drive 200 is variation of gear drive 100.About gear drive 200, exist by marking identical or rear two identical reference characters to the parts identical with gear drive 100 and situation about omitting the description.Gear drive 200 does not arrange the 4th limiting member 42 (with reference to Fig. 1).In gear drive 200, the second plate 2c is configured between the second packing ring 44 and input gear 234.Second packing ring 44 and input gear 234 are examples for a pair limiting member.
When gear drive 200, the second packing ring 44 and input gear 234 can be utilized to move vertically to limit roller bearing 32, and limit bent axle 212 and move along spin axis 40 direction.Gear drive 200, compared with gear drive 100, can reduce number of components with not using the second packing ring 44 accordingly.
Technology disclosed in this specification can be applied in the gear drive supported by the support member with pair of support parts (the first support, the second support) in the mode that can rotate at bent axle, bent axle fixed a pair limiting member and the one in support is configured at the various gear drives between a pair limiting member, is not limited to the mode of above-described embodiment.
Such as, in gear drive 100, also can install between the 4th packing ring 42 and input gear 34 and back-up ring 64 independently the second back-up ring.Thus, even if unload input gear 34 from bent axle 12, also can prevent the position of bent axle 12 on spin axis 40 direction from offseting.
In the above-described embodiments, the gear drive with two eccentric bodies is described.But eccentric body can be one, it also can be more than three.In addition, above-described embodiment is the gear drive that external gear carries out eccentric rotary, but the technology disclosed in this specification also can be applied to the gear drive that internal gear carries out eccentric rotary.
In the above-described embodiments, the gear drive being provided with through hole on the 4th packing ring and input gear is described.The through hole being located at the 4th packing ring is not limited to three.As long as at least one through hole is arranged on the position corresponding with the groove of input gear.As long as the through hole being located at input gear is also provided with at least one in the position be communicated with groove.In addition, the through hole of the 4th packing ring and/or input gear also can omit.Utilize the groove being formed at the second plate between second plate and the 4th packing ring and be provided with gap.Therefore, even if eliminate the through hole of the 4th packing ring and/or input gear, also via this groove, oiling agent can be supplied to the second roller bearing.
Above, describe concrete example of the present utility model in detail, but these only illustrating, is not limit claims.In the technology described in claims, comprise and various distortion, change and the technological scheme obtained are carried out to concrete example illustrated above.This specification or the technology essential factor illustrated by accompanying drawing separately or play technological applicability by various combination, are not limited to the combination described in claim when applying for.In addition, this specification or the technology illustrated in accompanying drawing reach multiple object simultaneously, and namely the object itself reached in these objects possesses skills practicability.
Claims (5)
1. a gear drive, is characterized in that, this gear drive comprises:
Bent axle, it has eccentric body;
Eccentric rotary gear, it coordinates with described eccentric body, and carries out eccentric rotary along with the rotation of bent axle;
Rotating gear, it is meshed with eccentric rotary gear, and has the number of teeth different from the number of teeth of eccentric rotary gear; And
Support member, it is for supporting crankshaft, and by columnar part, the first support of being oppositely disposed at spaced intervals and the second support is fixed,
Bent axle have from eccentric body to the side in spin axis direction extend the first axle part and from eccentric body to the opposite side in spin axis direction extend the second axle part,
The first axle part is supported on the first support by the first roller bearing,
The second axle part through the second support, and is supported on the second support by the second roller bearing,
The second axle part is fixed with for limiting a pair limiting member of bent axle to the movement of spin axis direction,
Second support is configured between a pair limiting member.
2. gear drive according to claim 1, is characterized in that,
First support and described columnar part integral,
Second support is dull and stereotyped.
3. gear drive according to claim 1, is characterized in that,
A pair limiting member is all packing rings.
4. gear drive according to claim 1, is characterized in that,
In a pair limiting member, to be positioned at than the second support by the limiting member of position on described eccentric side be packing ring, the limiting member being positioned at the side contrary with described eccentric body for the second support is the input gear for making crankshaft rotating.
5. gear drive according to any one of claim 1 to 4, is characterized in that,
Moving axially of second roller bearing is limited by a pair limiting member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014129413A JP6334289B2 (en) | 2014-06-24 | 2014-06-24 | Gear transmission |
| JP2014-129413 | 2014-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204739168U true CN204739168U (en) | 2015-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520440143.4U Active CN204739168U (en) | 2014-06-24 | 2015-06-24 | Gear drive |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6334289B2 (en) |
| CN (1) | CN204739168U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061635A (en) * | 2016-01-13 | 2017-08-18 | 纳博特斯克有限公司 | Geared system and output gear wheel plate |
| CN108412964A (en) * | 2017-02-09 | 2018-08-17 | 安徽聚隆机器人减速器有限公司 | A kind of eccentric oscillation gear device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5492700B2 (en) * | 2010-08-05 | 2014-05-14 | 住友重機械工業株式会社 | Roller retainer and swinging intermeshing gear device |
| JP5806968B2 (en) * | 2012-03-30 | 2015-11-10 | 住友重機械工業株式会社 | Eccentric oscillation type reducer |
| JP2013221545A (en) * | 2012-04-13 | 2013-10-28 | Nabtesco Corp | Cage for cylindrical roller bearing, and gear transmission |
-
2014
- 2014-06-24 JP JP2014129413A patent/JP6334289B2/en active Active
-
2015
- 2015-06-24 CN CN201520440143.4U patent/CN204739168U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061635A (en) * | 2016-01-13 | 2017-08-18 | 纳博特斯克有限公司 | Geared system and output gear wheel plate |
| CN107061635B (en) * | 2016-01-13 | 2021-06-15 | 纳博特斯克有限公司 | Gear device and output gear plate |
| CN108412964A (en) * | 2017-02-09 | 2018-08-17 | 安徽聚隆机器人减速器有限公司 | A kind of eccentric oscillation gear device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016008661A (en) | 2016-01-18 |
| JP6334289B2 (en) | 2018-05-30 |
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