CN209671533U - A kind of deceleration device - Google Patents

Abstract

The utility model discloses a kind of deceleration devices, are related to technical field of mechanical transmission.Including ring gear, input gear axle, first end cover, second end cover, bevel gear, crank axle and wobble gear, input gear axle passes through the centre bore of first end cover and second end cover, and it is flexibly connected with the centre bore of first end cover and second end cover, bevel gear is fixedly connected with one end of input gear axle, input gear axle includes first round teeth portion, crank axle includes the second wheel teeth portion and at least two eccentric wheels, first round teeth portion is engaged with the second wheel teeth portion, wobble gear includes multiple through-holes, through-hole is uniformly arranged around wobble gear center circumferential, eccentric wheel passes through through-hole respectively and is flexibly connected with wobble gear, and crank axle both ends are flexibly connected with first end cover and second end cover respectively, wobble gear and ring gear constitute gear pair with small teeth difference, second end cover includes interconnecting piece, for output torque and revolving speed.With higher reduction ratio and more compact structure, while enhancing the stability of operation.

Description

A kind of deceleration device

Technical field

The utility model relates to technical field of mechanical transmission, in particular to a kind of deceleration device.

Background technique

Deceleration device is that a kind of serve between prime mover and working machine or executing agency matches revolving speed and transmitting torque Instrument, using extremely wide in modern mechanical.Currently, deceleration device industry is very specialized, for different field, Different applications, deceleration device have formed scale, standardization, have brought great convenience for production application.But it is passed in precision Dynamic, robot etc. requires in the industry of accurate control, and common deceleration device cannot meet application requirement.Therefore, the property developed The excellent deceleration device of energy, has significant role to the production of China's mechanical equipment industry.

In the prior art, meet structure size miniaturization and higher reduction ratio very well while deceleration device cannot be, it is right In the deceleration device for meeting high reduction ratio, often size is larger, and the deceleration device reduction ratio of small size is insufficient, certain The development of mechanical transmissioning technology is limited in degree.And in use, especially by frequent impact load when, deceleration device Service life it is shorter, be unfavorable for the stable operation of drive apparatus, increase later maintenance burden.

Therefore, it is necessary to a kind of more compact structures, and transmission ratio is higher, run more stable deceleration device to meet higher biography Dynamic demand.

Utility model content

The purpose of this utility model is to provide a kind of deceleration devices, can have higher reduction ratio and more compact knot Structure, while enhancing the stability of operation.

The embodiments of the present invention are achieved in that

The utility model embodiment provides a kind of deceleration device, including ring gear, input gear axle, first end cover, second End cap, bevel gear, crank axle and wobble gear, the input gear axle pass through in the first end cover and the second end cover Heart hole, and be flexibly connected with the centre bore of the first end cover and the second end cover, the bevel gear and the input One end of gear shaft is fixedly connected, and the input gear axle includes first round teeth portion, and the crank axle includes the second wheel teeth portion, with And at least two eccentric wheels, the first round teeth portion are engaged with the second wheel teeth portion, the wobble gear includes multiple through-holes, The through-hole is uniformly arranged around the wobble gear center circumferential, and the eccentric wheel passes through the through-hole and the swing tooth respectively Wheel is flexibly connected, and the crank axle both ends are flexibly connected with the first end cover and the second end cover respectively, the swing Gear and the ring gear constitute gear pair with small teeth difference, and the second end cover includes interconnecting piece, are used for output torque and revolving speed.

Optionally, the first end cover includes multiple first mounting holes and multiple first connecting holes, first mounting hole It is arranged with the first connecting hole alternate intervals, the second end cover is provided with multiple second mounting holes and multiple second connections Hole, second mounting hole and the second connecting hole alternate intervals are arranged, and first mounting hole and second installation Hole on the same axis, first connecting hole and second connecting hole on the same axis, the first end cover and described Second end cover is fixedly connected by being threaded through first mounting hole with the pin shaft of second mounting hole, and the two of the crank axle End is separately positioned in first connecting hole and second connecting hole.

Optionally, the crank axle is coaxially arranged between one end and first connecting hole of the first end cover First cages for needle component and deep groove ball bearing, the first connecting hole inner wall are provided with first annular groove and first annular It is recessed to be provided with the second annular on the outside of the first annular protrusion for protrusion, the first annular groove setting on the crank axle Slot, and the first annular groove and the second annular groove are correspondingly arranged, it is the first annular groove, described first annular The raised and described second annular groove is matched for axial to the first cages for needle component and the deep groove ball bearing Positioning.

Optionally, the crank axle is provided with second between one end and second connecting hole of the second end cover Cages for needle component, the second connecting hole inner wall are provided with third annular groove and the second annular protrusion, the third ring Connected in star is arranged on the outside of second annular protrusion, and fourth annular groove, and the third ring are provided on the crank axle Connected in star and the fourth annular groove are correspondingly arranged, the third annular groove, second annular protrusion and the described 4th Annular groove is matched for the second cages for needle component axially position.

Optionally, third cages for needle component is provided between the eccentric wheel and the through-hole.

Optionally, the input gear axle further include be provided with the first round teeth portion intermediate shaft part and with it is described in Between coaxially connected the first shaft part, the first axle section are located at the side of the first end cover, first shaft part for shaft part one end Diameter is less than the intermediate shaft section diameter, is provided with axle sleeve on first shaft part, in the axle sleeve and the first end cover Needle bearing is provided between centre bore, the bevel gear is set on first shaft part and supports with the axle sleeve, in institute The end for stating the first shaft part is provided with threaded hole, and the bevel gear is fixedly connected by fastening bolt with first shaft part.

Optionally, the input gear axle further includes the second shaft part being coaxially connected with the intermediate shaft part other end, institute The side that the second shaft part is located at the second end cover is stated, second shaft section diameter is less than diameter at the intermediate shaft part, in institute It states back-to-back on the second shaft part or is provided with angular contact ball bearing face-to-face, in the center bore inner wall of the second end cover and described Second shaft part, which respectively corresponds, is provided with the 5th annular groove and the 6th annular groove, for axially fixed to the angular contact ball bearing Position.

Optionally, the ring gear includes needle teeth portion, the first limiting section and the second limiting section, the needle teeth portion and the pendulum Moving gear engagement, is provided with the first tapered roller bearing and match grinding washer between first limiting section and the first end cover, The second tapered roller bearing and outside framework oil seal, the match grinding washer are provided between second limiting section and the second end cover It is arranged on the inside of first tapered roller bearing, the outside framework oil seal is arranged on the outside of second tapered roller bearing.

Optionally, tooth socket is formed between the needle teeth portion adjacent needles tooth, the cross section of the tooth socket is that indent is arc-shaped, And the tall and big tooth in middle of tooth at needle tooth two sides is high, the gear teeth of the wobble gear are interior concave tooth.

Optionally, greasing hole is provided in the first end cover.

The beneficial effect of the utility model embodiment includes:

Deceleration device provided by the embodiment of the utility model is connected by the centre bore activity with first end cover and second end cover The input gear axle connect enables the preferable input torque of deceleration device, promotes stationarity when operation.By with input gear The bevel gear that one end of axis is fixedly connected makes input gear axle obtain revolving speed identical with bevel gear and torque, in addition, passing through cone The engaged transmission of gear and external motor output end realizes the primary speed-down of deceleration device.Pass through the first round of input gear axle Second wheel teeth portion engaged transmission of teeth portion and crank axle, makes the torque of input be transferred to crank axle, while realizing deceleration device Double reduction.By the through-hole being uniformly arranged around wobble gear center circumferential, and the eccentric wheel being arranged by through-hole, by crank The conversion of motion of the rotation of axis is the revolution motion of wobble gear, and then realizes that the few teeth difference between wobble gear and ring gear passes It is dynamic.By less teeth difference transmission, manufacturing cost is reduced, gear range is also bigger, and positioning accuracy and transmission efficiency are also higher, knot Structure is more compact, and smooth running is reliable.In addition, crank axle is flexibly connected with wobble gear, first end cover and second end cover simultaneously, The spinning motion of wobble gear will drive first end cover and second end cover makes rotating motion around central axis.Pass through second end cover Interconnecting piece, torque and revolving speed output after making conversion, to obtain bigger torque and smaller revolving speed.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is one of the structural schematic diagram of deceleration device provided by the embodiment of the utility model；

Fig. 2 is the A-A cross-sectional view of Fig. 1；

Fig. 3 is the B-B cross-sectional view of Fig. 2；

Fig. 4 is the second structural representation of deceleration device provided by the embodiment of the utility model.

Icon: 100- deceleration device；110- ring gear；111- needle teeth portion；The first limiting section of 112-；113- second is limited Portion；The first tapered roller bearing of 114-；115- match grinding washer；The second tapered roller bearing of 116-；117- outside framework oil seal；120- is defeated Enter gear shaft；121- bevel gear；122- first round teeth portion；The first shaft part of 123-；124- axle sleeve；125- needle bearing；126- is tight Fixing bolt；The second shaft part of 127-；128- angular contact ball bearing；The 5th annular groove of 129a-；The 6th annular groove of 129b-；130- First end cover；The first mounting hole of 131-；The first connecting hole of 133-；135a- first annular groove；135b- second annular groove； The first annular protrusion of 137-；139- greasing hole；140- second end cover；141- interconnecting piece；The second mounting hole of 143-；145- second connects Connect hole；147a- third annular groove；147b- fourth annular groove；The second annular protrusion of 149-；150- crank axle；151- second Take turns teeth portion；153- eccentric wheel；155- the first cages for needle component；157- deep groove ball bearing；159- the second cages for needle group Part；160- wobble gear；161- through-hole；163- third cages for needle component；The 165- gear teeth；170- pin shaft.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.

Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the range of the utility model protection.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", The orientation or positional relationship of the instructions such as "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings or this is practical new Type product using when the orientation or positional relationship usually put, be merely for convenience of describing the present invention and simplifying the description, and It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore It should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and It cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition Solve the concrete meaning of above-mentioned term in the present invention.

Referring to Fig.1 and 2, the utility model embodiment provides a kind of deceleration device 100, including ring gear 110, input Gear shaft 120, first end cover 130, second end cover 140, bevel gear 121, crank axle 150 and wobble gear 160, input gear axle 120 pass through the centre bore of first end cover 130 and second end cover 140, and the centre bore with first end cover 130 and second end cover 140 It is flexibly connected, bevel gear 121 is fixedly connected with one end of input gear axle 120, and input gear axle 120 includes first round teeth portion 122, crank axle 150 includes the second wheel teeth portion 151 and at least two eccentric wheels 153, first round teeth portion 122 and second gear teeth Portion 151 is engaged, and wobble gear 160 includes multiple through-holes 161, and through-hole 161 is uniformly arranged (such as around 160 center circumferential of wobble gear Shown in Fig. 3), eccentric wheel 153 is flexibly connected with wobble gear 160 by through-hole 161 respectively, and 150 both ends of crank axle respectively with First end cover 130 and second end cover 140 are flexibly connected, wobble gear 160 and the composition gear pair with small teeth difference of ring gear 110, and second End cap 140 includes interconnecting piece 141, is used for output torque and revolving speed.

It should be noted that first, the first round teeth portion 122 of input gear axle 120 and the second of crank axle 150 take turns teeth portion 151, which can be used the mode being detachably connected, can also be used integrally formed mode, and the present embodiment uses integrally formed mode.This Sample one can be enhanced stability when input gear axle 120 and the transmission of crank axle 150, reduce because of first round teeth portion 122 or the Two wheel teeth portion 151 loosen and influence the probability being normally driven, and also reduce assembly difficulty, are conducive to promote assembly efficiency.

Second, the utility model embodiment is inclined to the positional relationship of eccentric wheel 153, number and mutual eccentric direction Poor phase is not particularly limited, as long as can satisfy required transmission requirement.Exemplary, the number of eccentric wheel 153 can be with Be two, between 180 ° of phase phase difference of eccentric direction, so, can better balanced crank axle 150 stress, extend The service life of crank axle 150.If only one eccentric wheel 153, it cannot preferably guarantee stationarity when transmission, if eccentric The number of wheel 153 is more, then the number of the wobble gear 160 of corresponding assembly increases, and the transmission of invisible increase crank axle 150 is negative Load, also increases the weight of deceleration device 100.So best, the utility model embodiment when number of eccentric wheel 153 is 2-3 Using two eccentric wheels 153, preferably the stability of balanced transmission and crank axle 150 ability of fatigue stress can be born, into And promote the stability of deceleration device 100.In addition, first round teeth portion 122 and the second wheel 151 engagement place of teeth portion are located at second end cover Between 140 and wobble gear 160, deceleration device 100 can preferably share load, prolong the service life.

Third, wobble gear 160 and ring gear 110 constitute gear pair with small teeth difference, and the utility model embodiment is to swing tooth The difference of the number of teeth of wheel 160 and ring gear 110 is not particularly limited, and exemplary, the number of teeth of wobble gear 160 is than ring gear 110 The number of teeth lack 2 to 4 teeth, as long as can satisfy the stability and reduction ratio of required less teeth difference transmission.

Deceleration device 100 provided by the embodiment of the utility model, by in first end cover 130 and second end cover 140 The input gear axle 120 that heart hole is flexibly connected enables the preferable input torque of deceleration device 100, is promoted steady when running Property.By the bevel gear 121 being fixedly connected with one end of input gear axle 120, make the acquisition of input gear axle 120 and bevel gear 121 identical revolving speeds and torque realize deceleration device in addition, passing through the engaged transmission of bevel gear 121 and external motor output end 100 primary speed-down.It is engaged by the first round teeth portion 122 of input gear axle 120 and the second wheel teeth portion 151 of crank axle 150 Transmission makes the torque of input be transferred to crank axle 150, while realizing the double reduction of deceleration device 100.By around wobble gear The through-hole 161 that 160 center circumferentials are uniformly arranged, and the eccentric wheel 153 being arranged by through-hole 161, by the rotation of crank axle 150 Conversion of motion be the revolution motion of wobble gear 160, and then realize the few teeth difference between wobble gear 160 and ring gear 110 Transmission.By less teeth difference transmission, manufacturing cost is reduced, gear range is also bigger, and positioning accuracy and transmission efficiency are also higher, Structure is more compact, and smooth running is reliable.In addition, crank axle 150 simultaneously with wobble gear 160, first end cover 130 and second end Lid 140 is flexibly connected, and the spinning motion of wobble gear 160 will drive first end cover 130 and second end cover 140 is done around central axis Rotary motion.By the interconnecting piece 141 of second end cover 140, torque and revolving speed output after making conversion, to obtain bigger torque With smaller revolving speed.

As shown in Figure 1 and Figure 4, first end cover 130 includes multiple first mounting holes 131 and multiple first connecting holes 133, the One mounting hole 131 and 133 alternate intervals of the first connecting hole are arranged, and second end cover 140 is provided with multiple second mounting holes 143 and more A second connecting hole 145, the second mounting hole 143 and 145 alternate intervals of the second connecting hole are arranged, and the first mounting hole 131 and the Two mounting holes 143 on the same axis, the first connecting hole 133 and the second connecting hole 145 on the same axis, first end cover 130 It is fixedly connected with the pin shaft 170 of the second mounting hole 143 (such as Fig. 2 institute with second end cover 140 by being threaded through the first mounting hole 131 Show), the both ends of crank axle 150 are separately positioned in the first connecting hole 133 and the second connecting hole 145.

Specifically, pin shaft 170 is the multi-diameter shaft that middle diameter is greater than diameter at both ends, and set at the both ends of pin shaft 170 It is equipped with threaded hole.First mounting hole 131 of first end cover 130 is connected at the stepped profile of pin shaft 170, by lock-screw, It is fixedly connected with first end cover 130 with pin shaft 170.The threaded hole of pin shaft 170 at second mounting hole 143 of second end cover 140 It can be used as auxiliary connecting hole to be fixedly connected with external world's load, to promote the stability of connection.

The both ends that first connecting hole 133 and the second connecting hole 145 pass through crank axle 150 carry out axial limiting, so that first It is fixedly connected between end cap 130 and second end cover 140, forms planet carrier structure in conjunction with pin shaft 170.It should be noted that this Of the utility model embodiment to the first mounting hole 131, the first connecting hole 133, the second mounting hole 143 and the second connecting hole 145 Number is not particularly limited, exemplary, the first mounting hole 131, the first connecting hole 133, the second mounting hole 143 and the second connecting hole 145 number may be configured as 3, to better meet the requirement of stable drive.

As shown in Fig. 2, crank axle 150 is coaxially arranged between one end and the first connecting hole 133 of first end cover 130 First cages for needle component 155 and deep groove ball bearing 157,133 inner wall of the first connecting hole are provided with first annular groove 135a With first annular raised 137, first annular groove 135a setting is provided on first annular raised 137 outside, crank axle 150 Second annular groove 135b, and first annular groove 135a and second annular groove 135b are correspondingly arranged, first annular groove 135a, first annular raised 137 and second annular groove 135b are matched for the first cages for needle component 155 and zanjon 157 axially position of ball bearing.

Specifically, blocked hole retaining ring (such as internal jump ring), the interior card of second annular groove 135b in first annular groove 135a Hole retaining ring (such as outer circlip) is connect, first annular groove 135a and second annular groove 135b are correspondingly arranged, and refer specifically to One annular groove 135a and second annular groove 135b is on same assembly section, to 155 He of the first cages for needle component First side of deep groove ball bearing 157 carries out axially position.By first annular raised the 137 of 133 inner wall of the first connecting hole, with right Second side of first cages for needle component 155 and deep groove ball bearing 157 carries out axially position.In addition, on crank axle 150 also A settable annular groove, using shaft block ring to second side of the first cages for needle component 155 and deep groove ball bearing 157 The axially position assisted reduces the probability of axial float, and then improve the first needle roller to promote the stability of connection The service life of retainer component 155 and deep groove ball bearing 157.

Since the radial thickness of the first cages for needle component 155 and deep groove ball bearing 157 is different, crank axle 150 with The concentric circles circumferential surface that different-diameter can be used in the junction of first cages for needle component 155 and deep groove ball bearing 157 is matched It closes.It may also set up an annular groove and shaft block ring between the first cages for needle component 155 and deep groove ball bearing 157, subtract Small first cages for needle component 155 and deep groove ball bearing 157 interactional probability when being driven.Deep groove ball bearing 157 can be held By certain bi-directional axial load, and dust tightness is preferable, and deep groove ball bearing 157 is arranged in the first rolling the utility model embodiment 155 outside of needle retainer component.First cages for needle component, 155 radial structure is compact, internal diameter and load-carrying ability and its When his types of bearings is identical, minimum outer diameter is conducive to whole knot especially suitable for the supporting structure of the size-constrained system of radially installed The compactedness of structure.

As shown in Fig. 2, crank axle 150 is provided with second between one end and the second connecting hole 145 of second end cover 140 Cages for needle component 159,145 inner wall of the second connecting hole are provided with third annular groove 147a and the second annular protrusion 149, the Three annular groove 147a setting is provided with fourth annular groove 147b on 149 outside of the second annular protrusion, crank axle 150, and Third annular groove 147a and fourth annular groove 147b are correspondingly arranged, third annular groove 147a, 149 and of the second annular protrusion Fourth annular groove 147b is matched for 159 axially position of the second cages for needle component.

Specifically, blocked hole retaining ring (such as internal jump ring), the interior card of fourth annular groove 147b in third annular groove 147a Hole retaining ring (such as outer circlip) is connect, third annular groove 147a and fourth annular groove 147b are correspondingly arranged, and refer specifically to Three annular groove 147a and fourth annular groove 147b are on same assembly section, to the second cages for needle component 159 Side carries out axially position.The other side is by axially position is carried out at the stepped profile of crank axle 150, with lift crank axis 150 Stability when rotation.

As shown in Figures 2 and 3, third cages for needle component 163 is provided between eccentric wheel 153 and through-hole 161.

Specifically, certain revolving speed and torque can be transmitted to crank axle 150, crank axle when input gear axle 120 rotates 150 when carrying out spinning motion around own axes, and the eccentric wheel 153 on crank axle 150 just will drive wobble gear 160 and revolve Turn.By the third cages for needle component 163 being arranged between eccentric wheel 153 and the through-hole 161 of wobble gear 160, reduce Frictional force between crank axle 150 and wobble gear 160 is more favorable to the operation such as lubricated maintenance.

In addition, wobble gear 160 carries out revolution motion around the rotation axis of first end cover 130 and second end cover 140, by In revolving, wobble gear 160 occurs engagement with the needle teeth portion 111 of ring gear 110 and contacts, due to ring gear 110 and outside It consolidates motionless, therefore can reversely provide active force in 160 contact process of needle teeth portion 111 and wobble gear, the opposition meeting It pushes wobble gear 160 to generate the active force contrary with revolving, that is, generates the spinning motion for surrounding own axes, and should Spinning motion is contrary with revolution motion (being driven with input gear axle 120 contrary).When wobble gear 160 generates When spinning motion, this spinning motion can be passed to crank axle 150 by eccentric motion, cause crank axle 150 also to generate and enclose Around the revolution motion of the rotation axis of first end cover 130 and second end cover 140.The revolution motion of crank axle 150 drives first end Lid 130 and second end cover 140 are done rotation movement, and ultimately form the retarded motion opposite with input transmission direction.

As shown in Fig. 2, input gear axle 120 further include be provided with first round teeth portion 122 intermediate shaft part and with centre The first shaft part 123 that shaft part one end is coaxially connected, the first shaft part 123 are located at the side of first end cover 130, and the first shaft part 123 is straight Diameter is less than diameter at intermediate shaft part, axle sleeve 124 is provided on the first shaft part 123, at the center of axle sleeve 124 and first end cover 130 Needle bearing 125 is provided between hole, bevel gear 121 is set on the first shaft part 123 and supports with axle sleeve 124, in first axle The end of section 123 is provided with threaded hole, and bevel gear 121 is fixedly connected by fastening bolt 126 with the first shaft part 123.

It should be noted that needle bearing 125 can be to have retainer needle bearing, or no inner ring has retainer Needle bearing, the utility model embodiment are not particularly limited this.In addition, bevel gear 121 passes through fastening bolt 126 and first Shaft part 123 is fixedly connected, and so, facilitates the installation of the disassembly to bevel gear 121, can be replaced according to different demands different The bevel gear 121 of model, to meet different reduction ratio demands.

As shown in Fig. 2, input gear axle 120 further includes the second shaft part 127 being coaxially connected with the intermediate shaft part other end, the Two shaft parts 127 are located at the side of second end cover 140, and 127 diameter of the second shaft part is less than diameter at intermediate shaft part, in the second shaft part It is back-to-back or be provided with angular contact ball bearing 128 face-to-face on 127, in the center bore inner wall and the second shaft part of second end cover 140 127 respectively correspond and are provided with the 5th annular groove 129a and the 6th annular groove 129b, axial for diagonal contact ball bearing 128 Positioning.

Specifically, angular contact ball bearing 128 that is back-to-back or being arranged in pairs face-to-face is able to bear bi-directional axial load, mention The stability of high input gear axle 120.In addition, the center bore inner wall of second end cover 140 is provided with the 5th annular groove 129a, the Two shaft parts 127 are provided with the 6th annular groove 129b.Wherein, correspondence refers to the 5th annular groove 129a and the 6th annular groove 129b is on same assembly section, with diagonal 128 side axially position of contact ball bearing, the other side by the second shaft part 127 with Diagonal 128 axially position of contact ball bearing at the stepped profile of intermediate shaft part.So, self structure can preferably be utilized The freedom degree of angular contact ball bearing 128 is limited, the use of unnecessary part is reduced, advantageously reduces cost, promoted simultaneously The stability and compactedness of deceleration device 100.

As shown in Fig. 2, ring gear 110 includes needle teeth portion 111, the first limiting section 112 and the second limiting section 113, needle teeth portion 111 engage with wobble gear 160, and the first tapered roller bearing 114 is provided between the first limiting section 112 and first end cover 130 With match grinding washer 115, the second tapered roller bearing 116 and skeleton oil are provided between the second limiting section 113 and second end cover 140 Envelope 117, the setting of match grinding washer 115 are arranged in 114 inside of the first tapered roller bearing, outside framework oil seal 117 in the second taper roller 116 outside of bearing.

Specifically, as shown in Fig. 2, the first tapered roller bearing 114 and the second tapered roller bearing 116 are oppositely arranged, this Sample one, be able to bear biggish axial load and based on radial load connected load (such as exterior part itself Gravity or other active forces lead to the effects of moment of flexure generated power), improve the stability of deceleration device 100.In addition match grinding pad Circle 115 preferably can carry out axially position to the first tapered roller bearing 114, and outside framework oil seal 117 then proposes second end cover 140 For the function of dynamic radial seal, keep internal zero device lubrication more abundant, and reduces external environment to the shadow of deceleration device 100 It rings.

As shown in figure 3, being formed with tooth socket between 111 adjacent needles tooth of needle teeth portion, the cross section of the tooth socket is that indent is arc-shaped, And the tall and big tooth in middle of tooth at needle tooth two sides is high, the gear teeth 165 of wobble gear 160 are interior concave tooth.

Specifically, the tooth Gao Xiangtong at each needle tooth two sides, middle tooth Gao Xiangtong, the tooth at two sides is tall and big in middle Tooth it is high, so, the two sides of needle tooth will store more lubricant greases, and the arc-shaped tooth socket of indent can also store more Lubricant grease is conducive to lubrication when transmission and reduces the engagement temperature of the flank of tooth.In addition, the gear teeth 165 of wobble gear 160 are interior Concave tooth can be effectively reduced the contact stress of the flank of tooth, compared with traditional involute profile, have longer service life.

As shown in Figure 1, being provided with greasing hole 139 in first end cover 130.So, lubricant grease can be made more smooth Ground flows into inside deceleration device 100, and then temperature when being effectively reduced internal drive.Also the dimensions such as later period addition lubricating grease are facilitated The operation of shield property, saves maintenance time.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of deceleration device, which is characterized in that including ring gear, input gear axle, first end cover, second end cover, bevel gear, Crank axle and wobble gear, the input gear axle pass through the first end cover and the second end cover centre bore, and with institute The centre bore for stating first end cover and the second end cover is flexibly connected, one end of the bevel gear and the input gear axle It is fixedly connected, the input gear axle includes first round teeth portion, and the crank axle includes that the second wheel teeth portion and at least two are inclined Heart wheel, the first round teeth portion are engaged with the second wheel teeth portion, and the wobble gear includes multiple through-holes, and the through-hole is around institute Wobble gear center circumferential to be stated to be uniformly arranged, the eccentric wheel passes through the through-hole respectively and is flexibly connected with the wobble gear, And the crank axle both ends are flexibly connected with the first end cover and the second end cover respectively, the wobble gear with it is described interior Gear ring constitutes gear pair with small teeth difference, and the second end cover includes interconnecting piece, is used for output torque and revolving speed.

2. deceleration device according to claim 1, which is characterized in that the first end cover include multiple first mounting holes and Multiple first connecting holes, first mounting hole and the first connecting hole alternate intervals are arranged, and the second end cover is provided with Multiple second mounting holes and multiple second connecting holes, second mounting hole and the second connecting hole alternate intervals are arranged, and On the same axis, first connecting hole is with second connecting hole same for first mounting hole and second mounting hole On one axis, the first end cover and the second end cover are by being threaded through first mounting hole and second mounting hole Pin shaft is fixedly connected, and the both ends of the crank axle are separately positioned in first connecting hole and second connecting hole.

3. deceleration device according to claim 2, which is characterized in that the crank axle is close to one end of the first end cover The first cages for needle component and deep groove ball bearing are coaxially arranged between first connecting hole, in first connecting hole Wall is provided with first annular groove and first annular protrusion, and the first annular groove setting is outer in the first annular protrusion Side is provided with second annular groove on the crank axle, and the first annular groove and second annular groove correspondence are set It sets, the first annular groove, the first annular protrusion and the second annular groove are matched for first rolling Needle retainer component and the deep groove ball bearing axially position.

4. deceleration device according to claim 2 or 3, which is characterized in that the crank axle is close to the second end cover The second cages for needle component is provided between one end and second connecting hole, the second connecting hole inner wall is provided with third Annular groove and the second annular protrusion, the third annular groove are arranged on the outside of second annular protrusion, the crank axle On be provided with fourth annular groove, and the third annular groove and the fourth annular groove are correspondingly arranged, the third ring Connected in star, second annular protrusion and the fourth annular groove are matched for the second cages for needle component axis To positioning.

5. deceleration device according to claim 4, which is characterized in that be provided between the eccentric wheel and the through-hole Three cages for needle components.

6. deceleration device according to claim 1, which is characterized in that the input gear axle further includes being provided with described The intermediate shaft part of one wheel teeth portion and the first shaft part being coaxially connected with described intermediate shaft part one end, the first axle section are located at institute The side of first end cover is stated, first shaft section diameter is less than diameter at the intermediate shaft part, is provided on first shaft part Axle sleeve, is provided with needle bearing between the axle sleeve and the centre bore of the first end cover, and the bevel gear is set in described It is supported on first shaft part and with the axle sleeve, the end of first shaft part is provided with threaded hole, the bevel gear passes through tight Fixing bolt is fixedly connected with first shaft part.

7. deceleration device according to claim 6, which is characterized in that the input gear axle further includes and the jackshaft Coaxial connected second the second shaft part of shaft part of the section other end, second shaft part are located at the side of the second end cover, and described the Two shaft section diameters are less than diameter at the intermediate shaft part, back-to-back on second shaft part or be provided with angular contact ball face-to-face Bearing respectively corresponds on the center bore inner wall and second shaft part of the second end cover and is provided with the 5th annular groove and Six annular grooves, for the angular contact ball bearing axially position.

8. deceleration device according to claim 1, which is characterized in that the ring gear includes needle teeth portion, the first limiting section With the second limiting section, the needle teeth portion is engaged with the wobble gear, is set between first limiting section and the first end cover It is equipped with the first tapered roller bearing and match grinding washer, is provided with the second circular cone between second limiting section and the second end cover Roller bearing and outside framework oil seal, the match grinding washer are arranged on the inside of first tapered roller bearing, and the outside framework oil seal is set It sets on the outside of second tapered roller bearing.

9. deceleration device according to claim 8, which is characterized in that formed between adjacent needles tooth in the needle teeth portion with teeth Slot, the cross section of the tooth socket are that indent is arc-shaped, and the tall and big tooth in middle of the tooth at needle tooth two sides is high, the pendulum The gear teeth of moving gear are interior concave tooth.

10. deceleration device according to claim 1, which is characterized in that be provided with greasing hole in the first end cover.