CN217761903U

CN217761903U - Differential cycloidal pin gear speed reducer

Info

Publication number: CN217761903U
Application number: CN202122378689.XU
Authority: CN
Inventors: 张赛; 谭军
Original assignee: Shenzhen Linglve CNC Equipment Co Ltd
Current assignee: Shenzhen Linglve CNC Equipment Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-11-08
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses a differential cycloidal pin gear speed reducer, which comprises a speed reducer main body; the speed reducer main body consists of an output shaft, a crankshaft bearing, a front end cover, a second-stage cycloid gear, more than one bearing roller, a cycloid wheel bearing, a crankshaft, a shell, more than one pinwheel needle roller, a first-stage cycloid gear, a driving motor and a motor shell; the output shaft is provided with a second-stage cycloid pin wheel, the outer surface of the output shaft is provided with a first pin wheel needle groove, the inner surface of the output shaft is provided with a raceway, an inner surface needle groove and an outer surface raceway; the roller path is matched with a front end cover and a bearing outer roller path designed on a shell through a bearing roller to form a crossed needle bearing; the utility model is composed of two sets of cycloidal pin gear speed reducers with different tooth numbers, wherein, the first pin gear is fixed, the two cycloidal gears are fixedly connected or locked to rotate, the same crankshaft is shared, the input is carried out by the crankshaft, and the second pin gear is output; the precise speed reduction transmission scheme with high rigidity, long service life and low process requirement is realized.

Description

Differential cycloidal pin gear speed reducer

Technical Field

The utility model relates to a mechanical design field technical field, concretely relates to differential cycloid pinwheel speed reducer.

Background

At present, high-precision speed reducers required by the robot industry, the industrial automation field and the like mainly adopt schemes of harmonic speed reduction, RV speed reduction and the like, but the existing harmonic speed reduction schemes have the problems of weak rigidity and overload resistance, short service life and the like, and a primary cycloid pinwheel speed reduction scheme adopted by the RV speed reduction is difficult to control the cost and expand the production requirement high yield due to the reasons of complex structure, high process precision requirement, too large speed reduction ratio, difficulty in miniaturization and the like; meanwhile, due to the development of the existing low-voltage alternating-current servo motor, the rotating speed breaks through again, and under the same power, the high-rotating-speed small-torque motor has great advantages of a large-size large-torque low-speed motor, and if a high-speed small-torque motor is adopted, a speed reducer is required to have great speed ratio and the starting torque is small;

the existing harmonic speed reduction scheme has low rigidity, short service life and high requirements on materials, while the RV speed reduction scheme has a complex structure, high requirements on matching and process precision, difficulty in controlling cost and increasing yield, and the speed reduction ratio cannot be too large and is difficult to miniaturize.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a differential cycloidal pin gear speed reducer; the speed reducer is composed of two groups of cycloidal pin gear speed reducers with different tooth numbers, wherein a first-stage pin gear is fixed, two cycloidal gears are fixedly connected or locked to rotate, the two cycloidal gears share the same crankshaft and are input by the crankshaft, and a second-stage pin gear is output; the precise speed reduction transmission scheme with high rigidity, long service life and low process requirement is realized.

The utility model discloses differential cycloid pinwheel speed reducer realizes through following technical scheme: comprises a speed reducer main body; the speed reducer main body consists of an output shaft, a crankshaft bearing, a front end cover, a second-stage cycloid gear, more than one bearing roller, a cycloid wheel bearing, a crankshaft, a shell, more than one pinwheel needle roller, a first-stage cycloid gear, a driving motor and a motor shell;

the output shaft is provided with a second-stage cycloid pin wheel, the outer surface of the output shaft is provided with a first pin wheel needle groove, the outer surface of the output shaft is provided with a raceway, and the inner surface of the output shaft is provided with a needle groove; the roller path is matched with a front end cover and a bearing outer roller path designed on a shell through a bearing roller to form a crossed needle roller bearing; the housing supports the output shaft and limits more than one degree of freedom thereof, and only one degree of freedom is reserved; the needle roller grooves are respectively matched with needle rollers of the needle wheel to form a needle wheel part of the second-stage cycloidal needle wheel speed reducer; and the output shaft also provides support for the crankshaft through a crankshaft bearing.

As the preferred technical scheme, the shell is provided with a first-stage cycloidal pin gear speed reducer pin gear; the inner surface is provided with a second roller needle groove, more than one needle wheel needle roller is matched to form a needle wheel of the first-stage cycloidal needle wheel speed reducer, and the needle wheel and the front end cover are respectively provided with two halves of a bearing outer raceway.

As the preferred technical scheme, the first-stage cycloid gear is fixedly connected with or locked to rotate with the second-stage cycloid gear, and is matched with the eccentric part of the crankshaft through two cycloid wheel bearings, and meanwhile, the two cycloid gears are respectively matched with the two-stage pin wheels to form the differential cycloid pin wheel speed reducer.

As the preferred technical scheme, the crankshaft is fixedly connected with the rotor of the driving motor, and meanwhile, the stator part of the driving motor is fixedly connected with the motor shell.

As a preferred technical scheme, the number of teeth of two cycloid gears of the second-stage cycloid gear and the first-stage cycloid gear is respectively 1 less than the number of pins of the corresponding pin gear, and the number of teeth of the second-stage cycloid gear and the number of pins are irrelevant and unequal.

The utility model has the advantages that:

1. the two cycloid gears are driven by the same crankshaft, so that the transmission modes of various existing cycloid pinwheel speed reducers are greatly simplified, only a single crankshaft is needed, and the characteristics needing supporting and matching are all of a rotary structure, so that the supporting is simple, the precision is easy to guarantee, the relative position precision requirement is low, the requirements on concentric positions are met, the processing is simple, the process requirement is low, the implementation is easy, the speed reducer is greatly simplified compared with various existing cycloid pinwheel speed reduction schemes, and the cost control and the yield improvement can be easily realized;

2. the tooth difference adjustment of the two-stage cycloidal pin gear speed reducer can realize a large-scale reduction ratio, a larger reduction ratio can be realized with less tooth speed, namely, a larger pin gear roller pin and cycloidal gear tooth profile can be adopted in a certain volume, the rigidity of the speed reducer is improved, the service life is prolonged, and the like, meanwhile, the process requirements on processing can be greatly reduced due to the reduction of the tooth number and the pin number of the pin gear and the increase of the tooth profile and the roller pin, and meanwhile, the structure is more compact than that of the existing various cycloidal pin gear speed reducers, and the miniaturization are more easily realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the structure layout of the differential cycloidal pin gear speed reducer of the present invention;

fig. 2 is a schematic diagram of the structure explosion of the differential speed cycloidal pin gear speed reducer of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "the outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The use of terms such as "upper," "lower," and the like in describing relative spatial positions herein is for the purpose of facilitating the description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the present invention, unless otherwise explicitly specified or limited, the terms "set", "coupled", "connected", "through", "plugged", and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 and 2, the differential cycloidal pin gear reducer of the present invention comprises a reducer body; the speed reducer main body consists of an output shaft 001, a crankshaft bearing 010, a front end cover 002, a second-stage cycloidal gear 004, more than one bearing roller 008, a cycloidal gear bearing 009, a crankshaft 006, a shell 003, more than one pinwheel needle roller 007, a first-stage cycloidal gear 005, a driving motor 100 and a motor shell 102;

the output shaft 001 is arranged as a second-stage cycloid pin wheel, the outer surface of the output shaft is provided with a first pin wheel pin rolling groove, the outer surface of the output shaft is provided with a raceway, and the inner surface of the output shaft is provided with a pin rolling groove; the roller paths are matched with a bearing outer roller path designed on the front end cover 002 and the shell 003 through the bearing roller 008 to form a crossed needle roller bearing; the housing 003 supports the output shaft 001 and limits one or more degrees of freedom thereof, leaving only one degree of freedom; the needle roller grooves are respectively matched with needle roller needles 007 to form a needle wheel part of the second-stage cycloidal needle wheel speed reducer; and the output shaft 001 also provides support for the crankshaft 006 through a crankshaft bearing 010.

In this embodiment, the housing 003 is provided as a pin gear of the first-stage cycloidal pin gear reducer; the inner surface is provided with a second roller needle groove, more than one needle wheel needle roller 007 is matched to form a needle wheel of the first-stage cycloidal needle wheel speed reducer, and two halves of the bearing outer raceway are respectively arranged with the front end cover 002.

In this embodiment, the first-stage cycloid gear 005 and the second-stage cycloid gear 004 are fixedly connected or locked to rotate, and are matched with the eccentric part of the crankshaft 006 through two cycloid gear bearings 009, and simultaneously, the two cycloid gears are respectively matched with the two-stage pinwheels to form the differential cycloid pinwheel speed reducer.

In this embodiment, the crankshaft 006 is fixedly connected to the rotor of the driving motor 100, and the stator of the driving motor 100 is fixedly connected to the motor housing 102.

In this embodiment, the number of teeth of the two cycloid gears of the second-stage cycloid gear 004 and the first-stage cycloid gear 005 is 1 less than the number of needles of the corresponding needle gear, and there is no relation between the number of teeth of the second stage and the number of needles, and the teeth are not equal.

The utility model has the advantages that:

1. the two cycloid gears are driven by the same crankshaft, the transmission modes of various existing cycloid pinwheel speed reducers are greatly simplified, only a single crankshaft is needed, and the characteristics needing supporting and matching are all rotary structures, so that the support is simple, the precision is easy to guarantee, the relative position precision requirements are few, the requirements on concentric positions are met, the processing is simple, the process requirement is low, the implementation is easy, the speed reducer is greatly simplified compared with various existing cycloid pinwheel speed reduction schemes, and the cost control and the yield improvement can be easily realized;

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a differential cycloid pinwheel speed reducer which characterized in that: comprises a speed reducer main body; the speed reducer main body consists of an output shaft (001), a crankshaft bearing (010), a front end cover (002), a second-stage cycloid gear (004), more than one bearing roller (008), a cycloid wheel bearing (009), a crankshaft (006), a shell (003), more than one pinwheel needle roller (007), a first-stage cycloid gear (005), a driving motor (100) and a motor shell (102);

the output shaft (001) is arranged as a second-stage cycloid pin wheel, the outer surface of the output shaft is provided with a first pin wheel pin groove, the outer surface of the output shaft is provided with a raceway, and the inner surface of the output shaft is provided with a pin groove; the roller paths are matched with a front end cover (002) and a bearing outer roller path designed on a shell (003) through a bearing roller (008) to form a crossed needle bearing; the housing (003) supports the output shaft (001) and restricts one or more degrees of freedom thereof, leaving only one degree of freedom; the needle roller grooves are respectively matched with needle roller needles (007) to form a needle wheel part of the second-stage cycloidal needle wheel speed reducer; and the output shaft (001) also provides support for the crankshaft (006) through crankshaft bearings (010).

2. The differential speed cycloidal pin gear reducer of claim 1, wherein: the shell (003) is arranged as a pin gear of a first-stage cycloidal pin gear speed reducer; the inner surface is provided with a second roller needle rolling groove, more than one needle wheel needle roller (007) are matched to form a needle wheel of the first-stage cycloidal needle wheel speed reducer, and two halves of the bearing outer rolling path are respectively arranged with the front end cover (002).

3. The differential cycloidal pin gear reducer of claim 1 further comprising: the first-stage cycloid gear (005) and the second-stage cycloid gear (004) are fixedly connected or locked to rotate, and are matched with the eccentric part of the crankshaft (006) through two cycloid gear bearings (009), and meanwhile, the two cycloid gears are respectively matched with two-stage pinwheels to form a differential cycloid pinwheel speed reducer.

4. The differential cycloidal pin gear reducer of claim 1 further comprising: the crankshaft (006) is fixedly connected with a rotor of the driving motor (100), and a stator part of the driving motor (100) is fixedly connected with the motor shell (102).

5. The differential cycloidal pin gear reducer of claim 1 further comprising: the number of teeth of the two cycloid gears of the second-stage cycloid gear (004) and the first-stage cycloid gear (005) is 1 less than the number of needles of the corresponding needle wheel respectively, and the number of teeth of the two stages is irrelevant to the number of needles and is unequal.