CN206478173U - A kind of Eccentrically swinging gear device - Google Patents

Abstract

The utility model discloses a kind of Eccentrically swinging gear device, including outer barrel, wobble gear, bent axle and tooth rest, bent axle includes the first axle part, the second axle part, eccentric part, and eccentric part includes the first eccentric part, the second eccentric part, and the first axle part end has spline tooth；Crankshaft bearing supports bent axle and bent axle is rotated；Wobble gear has the through hole inserted for the eccentric part and has teeth portion；Outer barrel has the internal tooth of the teeth portion engagement of wobble gear；Tooth rest has installation portion, and installation portion is used to install crankshaft bearing.The first axle part has the first axle center, first eccentric part has the first eccentric part center, second eccentric part has the second eccentric part center, and first axle center, the first eccentric part center and the second eccentric part center, the first bottom of the tooth central point of bent axle upper spline tooth and the second bottom of the tooth central point are located in same index plane.This arrangement enhances the uniformity between many bent axles, so as to improve structural stability.

Description

A kind of Eccentrically swinging gear device

Technical field

The utility model is related to gear drive, in particular to a kind of Eccentrically swinging gear device.

Background technology

It is driven in current speed reducer structure using many bent axles, many bent axle mutual cooperations. A kind of gear drive of CN201180062058.3 Invention Announces, gear drive include internal gear, external gear and Bent axle.External gear is while engage one side relatively eccentric rotary with internal gear.Bent axle has with forming the through hole on external gear The eccentric body fastened.Bent axle is used to make external gear eccentric rotary.Pressed from both sides between the inner peripheral surface of through hole and the outer peripheral face of eccentric body Provided with ball bearing.The 1st groove of the outer ring equivalent to ball bearing is formed with the inner peripheral surface of through hole, on the outer peripheral face of eccentric body It is formed with the 2nd groove of the inner ring equivalent to ball bearing.

A kind of gear drive of CN201280041077.2 Invention Announces, geared system includes：Outer barrel；Multiple bent axles； Bearing, support bent axle are so that it is rotated freely, and is linked and rotated relative to outer barrel with the rotation of bent axle；Multiple spur gears, The position of support outer is extended in bent axle, is coaxially fixed with bent axle；Input gear, with being engaged in multiple straight-tooth The gear part of wheel, and transmit rotary driving force to each spur gear；And packing ring mechanism, including it is arranged on the packing ring of carrier exterior. Input gear is in the axially external position of bearing, by being engaged with multiple spur gears, so as to be restricted to not along input gear Move radially, and axial movement not along input gear is limited to by the packing ring of packing ring mechanism.

A kind of Eccentrically swinging gear device of CN201410147100.7 Invention Announces, including：It is formed with the song of eccentric part Axle；Support bent axle allows it to the crankshaft bearing of rotation；The inserting hole inserted with eccentric part, and the swing tooth with teeth portion Wheel；The outer barrel of the interior alligator engaged with the teeth portion with wobble gear；And for installing crankshaft bearing, and based on eccentric The swing of the wobble gear of the rotation in portion, produces the bearing of relative speed discrepancy between outer barrel.It is formed with bearing：Center Through hole；Configure from the central through hole to the position being radially offset from and for installing the mounting recess of crankshaft bearing；And Between central through hole and mounting recess in the opposite face of wobble gear and it can store the substrate side channel of lubricating oil. Hereby it is possible to lubricate crankshaft bearing.

A kind of gear drive of CN201380047470.7 Invention Announces and its crankshaft structure body used, Yi Zhongchi Wheel transmission device, it has internal gear, external gear, bent axle and supporting member.Bent axle is by a pair of the 1st cylinder roller bearing quilts Double base is in supporting member.The eccentric body of bent axle engages by the 2nd cylinder roller bearing with the through hole of external gear.In the axle of bent axle Upwards, the 1st annular construction member and the configuration of the 2nd annular construction member are in the position than the 1st cylinder roller bearing in the outer part.1st annular construction member It is fixed on bent axle.The external diameter of 1st annular construction member is smaller than the external diameter of the 1st cylinder roller bearing.2nd annular construction member is fixed on supporting structure Part.The internal diameter of 2nd annular construction member is smaller than the external diameter of the 1st cylinder roller bearing.

A kind of Eccentrically swinging gear device of CN201380048660.0 Invention Announces, Eccentrically swinging gear device tool Have：Bent axle, it is formed with eccentric part；Crankshaft bearing, it is used to support bent axle and enable bent axle to rotate；Wobble gear, it has There is the through hole inserted for eccentric part and there is external tooth；Outer barrel, it has the interior alligator for being used for engaging with the external tooth of wobble gear； Tooth rest, it is used to install crankshaft bearing, the swing carried out using wobble gear along with the rotation of eccentric part, its with it is outer Relative speed discrepancy is produced between cylinder.It is formed with tooth rest：Installation portion, it is used to install crankshaft bearing；Oil groove, it is in face On to the face of wobble gear along installation portion periphery and lubricating oil can be stored.

In existing speed reducer structure, many bent axles are installed, many bent axles coordinate jointly to be driven.But in bent axle Without certain standard in terms of processing and manufacturing, and the cooperation of many bent axles, so as to cause uniformity between bent axle poor, make reductor During operation, stability is poor.

In view of this, the utility model is proposed.

The content of the invention

The purpose of this utility model is to provide a kind of crankshaft structure of reductor, to solve in existing reductor because of bent axle Between the problem of stability is poor caused by uniformity difference.

In order to solve the problems, such as said structure, the utility model provides following technical scheme：

A kind of Eccentrically swinging gear device, it includes outer barrel, wobble gear, bent axle and tooth rest, bent axle, its formation There are the first axle part, the second axle part, eccentric part, the eccentric part includes the first eccentric part, the second eccentric part, the first axle part end Portion has spline tooth；Crankshaft bearing, it supports the bent axle and bent axle is rotated；Wobble gear, it has for described inclined The through hole of center portion insertion and with teeth portion；Outer barrel, it has the internal tooth engaged with the teeth portion of the wobble gear；Gear Frame, it is used to install the crankshaft bearing, the swing carried out using the wobble gear along with the rotation of the eccentric part, Relative speed discrepancy is produced between the outer barrel at it, installation portion is formed with the tooth rest, installation portion is used to install The crankshaft bearing, the first axle part has the first axle center, and the first eccentric part has the first eccentric part center, and the second eccentric part has Second eccentric part center, 3 points of first axle center, the first eccentric part center and the second eccentric part center are co-located at index plane Interior, the first bottom of the tooth central point and the second bottom of the tooth central point of bent axle upper spline tooth also are located in index plane.

It is preferred that, the first bottom of the tooth central point and the second bottom of the tooth central point of described bent axle upper spline tooth are on the first axle center Symmetrically.

It is preferred that, the first axle part and the second axle part coaxial line, i.e., in the projection of the first axle part axial end, the first axle center is thrown Shadow point and the second axle center subpoint are overlapped.

It is preferred that, in the projection of the first axle part axial end, the first eccentric part central projection point, the second eccentric part center are thrown Shadow point, three subpoints of the first axle center subpoint are in a straight line

It is preferred that, the equidistant bias of central shaft of the first eccentric part, the second eccentric part from bent axle on bent axle.

It is preferred that, the wobble gear is provided with three crankshaft holes.

It is preferred that, the crankshaft hole along radial direction it is equal from the central shaft of pin gear with a distance from, and along the circumferential direction Separate equidistant.

It is preferred that, through hole is additionally provided with wobble gear, the column for accommodating tooth rest, the through hole is along the circumferential direction Alternately configured with crankshaft hole, and equidistant configuration spaced apart in the circumferential direction.

Beneficial effect

The utility model processes many bent axles being engaged by setting index plane, controls error range, reduces as far as possible The otherness of many axles, so that structural stability is improved, and also bent axle is easy to measure and control in process, improves song The precision of axle.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the profile of the utility model reductor；

Fig. 2 is the schematic diagram of the pin wheel housing of the utility model reductor；

Fig. 3 is the pin gear schematic diagram of the utility model reductor；

Fig. 4 is the schematic diagram of the wobble gear of the utility model reductor；

Fig. 5 is the schematic diagram of the bent axle of the utility model reductor；

Fig. 6 is the Crankshaft end on projection schematic diagram of the utility model reductor；

Description of reference numerals

Further clearly to illustrate the annexation between structure of the present utility model and each part, give following attached Icon is remembered, and is illustrated.

Pin wheel housing 1；Pin teeth groove 11；Internal tooth 2；Pin tooth 21；Wobble gear 3；External tooth 31；Through hole 32；Crankshaft hole 33；Tooth rest 4；Output planetary frame 41；Column 411；Input planet carrier 42；Bearing 51；First tapered roller bearing 52；Second tapered roller Bearing 53；Needle roller bearing 54；Bent axle 6；First eccentric part 61；Second eccentric part 62；The first axle part 63；The second axle part 64； First eccentric part center 611；Second eccentric part center 621；First axle center 631；Second axle center 641；Throw at the first eccentric part center Shadow point 6111；Second eccentric part central projection point 6211；First axle center subpoint 6311；Second axle center subpoint 6411；Input Gear 7；Spline tooth 8；First bottom of the tooth 81；Second bottom of the tooth 82；First bottom of the tooth center 811；Second bottom of the tooth center 821.

By above-mentioned description of reference numerals, with reference to embodiment of the present utility model, it can be more clearly understood from and illustrate The technical solution of the utility model.

Embodiment

Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment Described in embodiment do not represent all embodiments consistent with the utility model.On the contrary, they be only with such as The example of the consistent apparatus and method of some aspects being described in detail in appended claims, of the present utility model.

The term used in the utility model is the purpose only merely for description specific embodiment, and is not intended to be limiting this reality With new." one kind ", " described " and "the" of singulative used in the utility model and appended claims It is intended to include most forms, unless context clearly shows that other implications.It is also understood that term used herein " and/ Or " refer to and may be combined comprising one or more associated any or all of project listed.

It will be appreciated that though various information may be described using term first, second, third, etc. in the utility model, But these information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, not In the case of departing from the utility model scope, the first information can also be referred to as the second information, similarly, and the second information can also It is referred to as the first information.Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ... " or " in response to determining ".

The utility model will be described in detail by embodiment below.

Referring to Fig. 1, a kind of Eccentrically swinging gear device, it includes outer barrel, wobble gear, bent axle and tooth rest.It is bent Axle, it is formed with eccentric part；Crankshaft bearing, it supports the bent axle and bent axle is rotated；Wobble gear, it is cycloid Wheel, it has the through hole inserted for the eccentric part and has teeth portion；Outer barrel, it has the tooth with the wobble gear The internal tooth of portion's engagement；Tooth rest, it is used to install the crankshaft bearing, using the wobble gear along with the eccentric part The swing for rotating and carrying out, produces relative speed discrepancy between the outer barrel at it, installation is formed with the tooth rest Portion, it is used to install the crankshaft bearing.

Pin gear is made up of pin wheel housing 1, internal tooth 2.Referring to Fig. 2 ~ 3, the approximate cylinder shape of pin wheel housing 1, the inner circumferential shape of pin wheel housing 1 It is semicircular pin teeth groove 11 into the section of its multiple axial direction central portion, these pin teeth groove 11 extend in the axial direction, edge The equidistant separation of circumferencial direction, the distance is the tooth pitch of pin gear.Internal tooth 2 is made up of multiple pin teeth 21, the number of pin tooth 21 Identical with the quantity of pin teeth groove 11, the substantially half of these pin teeth 21 is inserted into pin teeth groove 11, therefore along the circumferential direction with certain Tooth pitch is arranged on the inner circumferential of pin wheel housing 1.Tooth pitch is the length of the circular arc line segment at the center of two pin teeth 23 of arbitrary neighborhood herein.

In pin gear 1, two wobble gears 3 annular in shape are contained side by side in the axial direction, referring to Fig. 4, the two The periphery of wobble gear forms trochoid tooth form, multiple external tooths 31 that specially peritrochoid tooth form is constituted respectively.Also, at this In embodiment, the number of teeth of the gear ratio single group internal tooth 2 of the external tooth 31 of wobble gear 3 is few 1, i.e. tooth difference is 1, can now be provided High speed reducing ratio, and processing charges can be reduced.When slowing down, two wobble gears 3 are nibbled with two groups of internal tooths being set up in parallel 2 respectively Close.

It is formed with the crankshaft hole 33 of 3 insertions in the axial direction on two wobble gears 3, these crankshaft holes 33 are along radius side To the central shaft from outer barrel 1 it is equal with a distance from, it is and spaced apart in the circumferential direction equidistant.There are three through holes on wobble gear 3 32, these through holes 32 are along the circumferential direction alternately configured with crankshaft hole 33, and equidistant configuration spaced apart in the circumferential direction.

Tooth rest 4 is installed in pin wheel housing 1, referring to Fig. 1, the tooth rest 4 is by configuring the axis direction in wobble gear 3 Output planetary frame 41, the input planet carrier 42 in two outsides are constituted；One end of input planet carrier 42 can load and unload ground by multiple bolts It is connected to 3 columns 411 on output planetary frame 41.Also, column 411 extends in the axial direction, and keeps gap Work is embedded in the through hole 32 of wobble gear 3.

A pair of bearings 51 is installed on tooth rest 4, specifically, this pair of bearings 51 is arranged on output planetary frame 41, defeated Enter between the periphery of planet carrier 42 and the axis direction two ends inner circumferential of rotation pin wheel housing 1, limiting gear frame 4 is relative to pin wheel housing 1 In axial direction moved with circumferential direction.By these bearings 51, tooth rest 4 can rotatably outer support cylinder.The circumference of tooth rest 4 Direction separates 3 bent axles of equal angle configurations；The first circular cone on one end of its axis direction is embedded with outside these bent axles 6 Roller bearing 52 and the second tapered roller bearing 53 on the other end of its axis direction, this pair of taper roll bearings Bent axle 6 is limited to move to axially and radially direction relative to tooth rest 4, and by tooth rest 4, i.e. output planetary frame 41, line of input Carrier 42 is rotatably supported.

Referring to Fig. 5 ~ 6, bent axle 6 is made up of the first axle part 63, the first eccentric part 61, the second eccentric part 62, the second axle part 64； There is spline tooth 8 in the end of the first axle part 63, be engaged with input gear 7.Bent axle 6 its axis direction center have two from The equidistant eccentric eccentric part of central shaft of bent axle 6, the first eccentric part 61, the second eccentric part 62, eccentric part is fixed in bent axle Be located at position between the first tapered roller bearing 52, the second tapered roller bearing 53.The first axle part 63, the first eccentric part 61st, the second eccentric part 62, the central point of the second axle part 64 are respectively that the first axle center 631, the first eccentric part center 611, second are inclined Center portion center 621, the second axle center 641.In the axial end projection of the first axle part 63, the axial end subpoint in the first axle center 631 For the first axle center subpoint 6311, the axial end subpoint at the first eccentric part center 611 is the first eccentric part central projection point 6111, the axial end subpoint at the second eccentric part center 621 is the second eccentric part central projection point 6211, the second axle center 641 Axial end subpoint is the second axle center subpoint 6411.The first axle part 63 and the coaxial line of the second axle part 64, i.e. the first axle center projection The axle center subpoint 6411 of point 6311 and second is overlapped.

The first bottom of the tooth 81 and the second bottom of the tooth 82 of spline tooth 8 are symmetrical on the first axle center 631, the axial end of the first axle part 63 The upper contour curve central point corresponding to the first bottom of the tooth 81 is phase in the first bottom of the tooth central point 811, the axial end of the first axle part 63 Should be the second bottom of the tooth central point 821 in the contour curve central point of the second bottom of the tooth 82.Correspondingly, the first bottom of the tooth central point 811 with Second bottom of the tooth central point 821 is symmetrical on the first axle center 631.First bottom of the tooth central point 811, the second bottom of the tooth central point 821, first Straight line where 631 3 points of axle center is designated as datum linem.First bottom of the tooth central point 811, the second bottom of the tooth central point in the structure of bent axle 6 821st, the first axle center 631, the second axle center 641, the second eccentric part center 621, the first eccentric part center 611, the first eccentric part 61 Peak and the second eccentric part 62 minimum point in the same plane.

Bent axle 6 is in the projection of the axial end of the first axle part 63, in the first eccentric part central projection point 6111, the second eccentric part 6,211 two points of heart subpoint belongs to datum linem；I.e. in the projection of the axial end of the first axle part 63, the first eccentric part central projection point 6111st, the second eccentric part central projection point 6211,6,311 3 subpoints of the first axle center subpoint are in a straight line.But process axle Process easily there is deviation, cause the first eccentric part central projection point 6111, the second eccentric part central projection point 6211 at least one Point is not belonging to datum linem；Now, the first eccentric part central projection point 6111 and the place straight line of the first axle center subpoint 6311, with Second eccentric part central projection point 6211 and non-180 ° of 6311 place straight line angulation of the first axle center subpoint.Through measuring, this When angulation deviate 180 ° difference be Δ α.Using this deviation Δ α as standard, second bent axle, the 3rd bent axle are processed, The crank shaft deflection value Δ α being engaged in same reductor of control is close, and then the uniformity of three bent axles of maximized holding, So as to improve structural stability.

Work is embedded in the crankshaft hole 33 of wobble gear 3 eccentric part of bent axle 6 respectively, and is provided with needle-like between them Roller bearing 54, thus, wobble gear 3 are supported on tooth rest 4 by bent axle 6, and allow to rotate against with bent axle 6.Also, One end that the axis direction of each bent axle 6 is located at the outside of taper roll bearing 53 is fixed with input gear 7, these input gears 7 with The external tooth gear engagement set on driving motor output shaft one end.

When motor works, when the torque of motor is transferred to input gear 7, bent axle 6 surrounds the central shaft of itself Rotation.Now, the eccentric part of bent axle 6 eccentric rotary in the crankshaft hole 33 of wobble gear 3.Now, along with the inclined of eccentric part The heart is rotated, and the one side of wobble gear 3 is engaged with outer barrel 1, while carrying out eccentric rotary around axis.The number of teeth of wobble gear 3 and outer barrel 1 The number of teeth it is different.Therefore, in 3 eccentric rotary of wobble gear, tooth is correspondingly swung with the number of teeth difference of wobble gear 3 and outer barrel 1 Wheel 3 relatively rotates relative to outer barrel 1.As a result, the tooth rest 4 being supported to wobble gear 3 is relative to outer barrel 1 relatively Rotation.In addition, the axis of tooth rest 4 and outer barrel 1 is identical with the axis of gear drive.

It should be pointed out that for the person of ordinary skill of the art, under the premise without departing from the principles of the invention, may be used also To carry out some improvement and modification to the present invention, these are improved and modification is also fallen into the protection domain of the claims in the present invention.

Claims (8)

1. a kind of Eccentrically swinging gear device, it includes outer barrel, wobble gear, bent axle and tooth rest, bent axle, and it is formed with The first axle part（63）, the second axle part（64）, eccentric part, the eccentric part include the first eccentric part（61）, the second eccentric part（62）, The first axle part（63）End has spline tooth（8）；Crankshaft bearing, it supports the bent axle and bent axle is rotated；Pendulum Moving gear（3）, it has the through hole inserted for the eccentric part and has teeth portion；Outer barrel, it has and the wobble gear （3）The teeth portion engagement internal tooth（2）；Tooth rest（4）, it is used to install the crankshaft bearing, utilizes the wobble gear （3）The swing carried out along with the rotation of the eccentric part, relative speed discrepancy is produced at it between the outer barrel, in institute State tooth rest（4）On be formed with installation portion, installation portion is used to install the crankshaft bearing, the first axle part（63）With the first axle center （631）, the first eccentric part（61）With the first eccentric part center（611）, the second eccentric part（62）With the second eccentric part center （621）, first axle center（631）, the first eccentric part center（611）With the second eccentric part center（621）3 points are co-located at In index plane, it is characterised in that：Bent axle（6）Upper spline tooth（8）The first bottom of the tooth central point（811）With the second bottom of the tooth central point （821）It also is located in index plane.

2. Eccentrically swinging gear device according to claim 1, described bent axle（6）Upper spline tooth（8）The first tooth Bottom central point（811）With the second bottom of the tooth central point（821）On the first axle center（631）Symmetrically.

3. Eccentrically swinging gear device according to claim 1, it is characterised in that：The first axle part（63）With the second axle part （64）Coaxial line, in the first axle part（63）In the projection of axial end, the first axle center subpoint（6311）With the second axle center subpoint （6411）Overlap.

4. Eccentrically swinging gear device according to claim 1, it is characterised in that：In the first axle part（63）Axial end In projection, the first eccentric part central projection point（6111）, the second eccentric part central projection point（6211）, the first axle center subpoint （6311）Three subpoints are in a straight line.

5. Eccentrically swinging gear device according to claim 3, it is characterised in that：Bent axle（6）On the first eccentric part （61）, the second eccentric part（62）From bent axle（6）The equidistant bias of central shaft.

6. Eccentrically swinging gear device according to claim 1, it is characterised in that：The wobble gear is provided with three Crankshaft hole（33）.

7. Eccentrically swinging gear device according to claim 5, it is characterised in that：The crankshaft hole（33）Along radius side To the central shaft from pin gear it is equal with a distance from, it is and spaced apart in the circumferential direction equidistant.

8. Eccentrically swinging gear device according to claim 6, it is characterised in that：Through hole is additionally provided with wobble gear （32）, the column for accommodating tooth rest（411）, the through hole（32）Along the circumferential direction with crankshaft hole（33）Alternately match somebody with somebody Put, and equidistant configuration spaced apart in the circumferential direction.