CN113202853A

CN113202853A - Eccentric bearing with speed reduction function and speed reducer with same

Info

Publication number: CN113202853A
Application number: CN202110650134.8A
Authority: CN
Inventors: 钟永先
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-25
Filing date: 2021-06-11
Publication date: 2021-08-03

Abstract

The invention aims to provide an eccentric bearing with a structure form, so that the eccentric bearing has a speed reducing function or a speed reducing function with a variable speed ratio. The eccentric function of the bearing is not obtained by the deviation of the axial lead of the inner hole of the inner ring from the axial lead of the revolution circumference of the roller, but the distance of the axial lead of the outer ring from the axial lead of the inner ring is determined by the size of the arranged roller, the position of the arranged roller or the size and the position of the arranged roller. The application of the technology disclosed by the invention can make mechanical devices in a wider field obtain technical progress, especially can make some mechanical devices which use eccentric bearings or crankshafts and need speed conversion achieve the purposes of simplifying the structure and reducing the volume and weight, and can be used for improving differential reducers, cycloidal pin gear reducers, RV reducers and the like.

Description

Eccentric bearing with speed reduction function and speed reducer with same

Technical Field

The invention relates to the fields of machinery, mechanical transmission and mechanical-electrical integration, in particular to the fields of eccentric bearings, engines, compressors, speed reducers, robots and bionic robots.

Background

In the prior art, a machine such as a compressor having a crankshaft or an eccentric bearing is decelerated by a deceleration device and then drives the crankshaft or the eccentric bearing if the speed reduction is required, thereby increasing the volume and weight.

Disclosure of Invention

The invention aims to provide an eccentric bearing structure form which enables an eccentric bearing to have a speed reducing function or a speed reducing function with an accurate speed ratio.

Another object of the present invention is to provide an eccentric bearing which can change the eccentricity of the bearing by changing the distribution position of the rollers or the distribution positions of the rollers and the rollers without making the inner bore of the inner ring eccentric.

Another objective of the present invention is to provide an eccentric bearing technology combined with a reduction gear or reducer to reduce the cost, facilitate manufacturing, and make the robot, the bionic robot, the execution devices under various control modes, the execution devices of artificial intelligence, the human exoskeleton device, etc. light and efficient. And as a component of their own suite of robots, including proprietary technology, and artificial intelligence system intellectual property.

Another object of the invention is to propose a transmission device with an eccentric bearing that makes it possible to adapt various tools, instruments and multi-purpose tools, instruments, etc. that require a change of force to use, transport.

The eccentric bearing for realizing the purpose of the invention mainly comprises the following components:

the eccentric bearing at least has partial or whole structure of the prior art, but the eccentric function of the bearing is not obtained by the deviation of the axial lead of an inner hole of an inner ring from the axial lead of the revolution circumference of the roller, but the distance of the axial lead of an outer ring from the axial lead of the inner ring is determined by the size of the arranged roller or the size and distribution angle of the arranged roller; the inner race is in direct driving relationship with the rollers, and the rollers are also in direct driving relationship with the outer race.

Taking as an example the eccentric bearings in which no sliding friction transmission is assumed between the outer raceway of the inner ring and the rollers and between the inner raceway of the outer ring and the rollers: when the rotation of the outer ring relative to the self axis is limited or limited to a certain degree, the rotation speed of the axis of the outer ring around the axis of the inner ring is slower than that of the inner ring, and when the outer ring is completely limited to rotate relative to the self axis and can only translate, the ratio of the rotation speed of the inner ring to the rotation speed of the axis of the outer ring around the axis of the inner ring is equal to the sum of the quotient of the diameter value of the inner raceway of the outer ring divided by the diameter value of the outer raceway of the inner ring plus 1 to be 1. When the resistance to be overcome when the inner ring drive roller rolls is larger than the resistance to rotate the axis of the outer ring around the axis of the inner ring, the rotation speed ratio becomes low. When the force which is required to be overcome when the inner ring drive roller rolls and is larger than the force which is required to rotate the axis of the outer ring around the axis of the inner ring is the resistance force which is not required to be generated by the relative motion, such as static friction force, the ratio of the rotation speed of the inner ring to the rotation speed of the axis of the outer ring around the axis of the sun shaft is 1 to 1, namely, the two rotate synchronously.

The gear ratio can be controlled or automatically changed by controlling the resistance to be overcome when the inner ring driving roller rolls by arranging a clutch and the like, for example, the speed of the piston in the suction stroke can be higher than that in the compression stroke or the later section of the compression stroke, so that the volume efficiency, the use efficiency of the motor and the like can be improved.

The number of rollers in the eccentric bearing of the present invention may be designed to be as many as the limit that can be set in the structure, or may be designed to be only one. For example, in some embodiments in which the range of motion of the outer race is limited to ensure that the distance between the axis of the outer race and the axis of the inner race does not exceed the distance that can be used for normal transmission, only one roller may be provided. For example, in embodiment 6 of the present specification, when the force in the same rotational direction is always applied to the sun shaft, only one roller may be used for each eccentric bearing.

In applications where a tight maintenance of the transmission ratio is required, this can be achieved by gearing the rollers to the inner ring, the rollers to the outer ring or a combination of gearing and friction. The gear is not limited in kind and can be normally driven.

Advantageous effects

The technology disclosed by the invention can be used for making mechanical devices in a wider field technically improved, and particularly can be used for making some mechanical devices which are used for crankshafts or eccentric bearings and need speed conversion achieve the purposes of simplifying the structure and reducing the volume and weight, and can be used for improving differential reducers, cycloidal pin gear reducers, RV reducers and the like. For example, when the cycloidal pin gear speed reducer is applied, the advantage that the reduction ratio can be conveniently adjusted within a certain range can be obtained while the multiple reduction ratio can be improved without changing the appearance or even only replacing the eccentric bearing in the prior art with the eccentric bearing in the invention, and the like.

Drawings

Fig. 1 is a schematic view of an eccentric bearing with 2 rollers having a speed reducing function.

Fig. 2 is a schematic view of an eccentric bearing with 4 rollers having a speed reducing function.

Fig. 3 is a schematic view of an eccentric bearing with 3 rollers having a speed reducing function.

Fig. 4 is a schematic view of an eccentric bearing with a spur gear as a roller and having a speed reduction function.

Fig. 5 is a schematic view of an eccentric bearing with a helical gear as a roller having a deceleration function.

Fig. 6 is an overall schematic view of a reduction gear including an eccentric bearing having a reduction function.

Fig. 7 is an exploded view of the reducer of fig. 6.

Fig. 8 is a schematic view of a transmission B of the reduction gear shown in fig. 6.

Fig. 9 is a schematic view showing a state in which a sun shaft of the speed reducer shown in fig. 6 is engaged with a roller.

Fig. 10 is a schematic view of a sun shaft, 1 transmission member a, and rollers for transmission between the sun shaft and the transmission member a of the reduction gear shown in fig. 6, and their engagement.

Fig. 11 is a schematic view of the sun shaft, the transmission member a, the roller that transmits between the sun shaft and the transmission member a, and their engagement of the sun shaft and the transmission member a of the reduction gear shown in fig. 6.

Detailed Description

Examples 1 to 5

Fig. 1 to 5 illustrate 5 embodiments of the present invention, respectively, an inner ring is illustrated as being integrated with a sun shaft, and an outer ring of fig. 1 to 4 is illustrated as being integrated with a connecting rod.

Fig. 1 shows an eccentric bearing with 2 rollers, in which a sun shaft 1 is in rolling contact with rollers 3 and 4, and rollers 3 and 4 are simultaneously in rolling contact with an inner raceway 5 of an outer ring integral with a connecting rod 2.

Figure 2 shows an eccentric bearing with 4 rollers.

Figure 3 shows an eccentric bearing with 3 rollers.

Fig. 4 shows the eccentric bearings with the rollers and the sun shaft and the rollers and the outer ring in the form of gear engagement.

FIG. 5 shows an eccentric bearing with helical gear meshing between the roller and the sun shaft and between the roller and the outer ring.

Example 6

Fig. 6 to 11 show an embodiment of a differential reduction gear using the eccentric bearing of the present invention, in which 2 eccentric bearings are included in the present embodiment, the synchronization of the gear transmission and the low loss factor of the rolling bearing are achieved by combining the gear mesh transmission and the friction transmission, the outer ring of the eccentric bearing is integrated with the transmission member a, and each eccentric bearing is provided with 2 rollers having a transmission diameter whose size is larger than the difference between the transmission inner radius size of the outer ring and the transmission radius size of the sun shaft. Fig. 6 is an external perspective view of the present embodiment, in which the marked line 8 indicates a sun shaft, the marked line 9 indicates a transmission member B, and the

marked lines

10 and 11 indicate transmission members C and 13 coaxially arranged on both sides of the transmission member B, respectively, and bolts for fixing the transmission member B to the base 12. Fig. 7 is an exploded view of the present embodiment, fig. 8 is an enlarged view of the transmission member B of the present embodiment, fig. 9 is a schematic view of the relative positions and the fitting relationships between the sun shaft 8 and the bearing 14, between the bearing 15 and the

rollers

25, 26, 31, 32, fig. 10 is a schematic view of the relative positions and the fitting relationships between the sun shaft 8 and the rollers 31, between the rollers 32, and 1 transmission member a, and fig. 11 is a schematic view illustrating the relative positions and the fitting relationships between all 2 transmission members a and the rollers 25, between the rollers 26, and between the sun shaft 8. In the illustration of the present embodiment, the

marked lines

38 and 39 are cylindrical surfaces on the sun shaft which are in rolling contact with the cylindrical surfaces of the 4 rollers indicated by the

marked lines

25, 26, 31 and 32, the cylindrical surfaces of the

rollers

25 and 26 are also in rolling contact with the inner cylindrical surface 22 of the first transmission member a, and the cylindrical surfaces of the

rollers

31 and 32 are also in rolling contact with the inner cylindrical surface 28 of the second transmission member a; 34. 35, 36, 37 are gears on the sun shaft which mesh with the

gears

40 and 42, 41 and 43, 44 and 46, 45 and 47 on the rollers, respectively, and the

gears

40, 42 on the

rollers

25, 26 also mesh with the internal gear 48 on the first transmission member a, the

gears

41, 43 on the

rollers

25, 26 also mesh with the internal gear 49 on the first transmission member a, the

gears

44, 46 on the

rollers

31, 32 also mesh with the internal gear 50 on the second transmission member a, and the

gears

45, 47 on the

rollers

31, 32 also mesh with the internal gear 51 on the second transmission member a; the cycloid gear 23 on the first transmission member A is meshed with the needle gear on the transmission member C indicated by the marked line 10, the cycloid gear 30 on the second transmission member A is meshed with the needle gear on the transmission member C indicated by the marked line 11, the cycloid gear 24 on the first transmission member A and the cycloid gear 29 on the second transmission member A are both meshed with the needle gear on the transmission member B, the marked line 18 is the needle tooth of the needle gear on the transmission member B, the marked line 19 is the needle tooth of the needle gear on the transmission member C indicated by the marked line 11, the marked line 21 is the bearing seat hole of the bearing 15 on the transmission member C indicated by the marked line 11, and the retainer ring 16 and the retainer ring 17 are used for limiting the axial position of the needle tooth and reducing the friction between the transmission member B and the transmission member C. The exterior of the driving member C in this embodiment or similar embodiments can be connected to or integrated with various devices suitable for the purpose of application, such as a drum, a gear, a sprocket, a robot arm, etc.

Example 7

The cycloid gear and the pin gear in the embodiment 6 are changed into other gears, such as gears with involute tooth profiles.

Example 8

The eccentric bearing is applied to the cycloidal pin gear speed reducer.

Example 9

Cam pumps or other cam-equipped devices achieve the cam function with the eccentric bearing of the present invention to achieve better performance.

The term "drive diameter" or "drive radius" as used herein means the diameter or radius of the race in the case of a race, the pitch diameter or radius of a spur gear in the case of a gear, and so on. The present application document follows the names of the components or assemblies used in the chinese patent application No. or patent nos. 2021102482526, 2021100144633, etc., filed by the present applicant, such as "transmission a", "transmission B", "transmission C", etc.; also, in order to express the technical contents of the invention more clearly, details such as a method or a structure for restricting the axial position of the roller, lubrication and oil sealing, etc., which are easily achieved by a person of ordinary skill, are not described or illustrated in the document.

The eccentric bearing based on the technology disclosed in the present application can also be combined with the technology disclosed in the patent application with the application number or patent number 2021102482526 and used in all the embodiments or examples proposed in the patent application, and can also be combined with the technology disclosed in the patent application with the application number or patent number 2021100144633 or the embodiments or examples to obtain more embodiments and the like, and the present application should not necessarily be listed. The claims set forth at the end of this application do not fully encompass the points of the invention disclosed in this document, as the broadest object claimed herein is to not raise the cost or hinder the application of the invention by other patents identified at these points; while not intending to limit the scope of the invention in any way, it will be appreciated that those skilled in the relevant art, including mathematics, geometry, machinery, bearings, engines, compressors, electromechanical and reduction gears, robots, etc., may readily adapt or apply the techniques and embodiments disclosed herein without the use of inventive faculty, while remaining within the scope of the claims and prior art after the disclosure.

Claims

1. An eccentric bearing, characterized by: a roller having at least a toothed wheel, having at least an inner race and an outer race; the inner ring and the roller form a direct transmission relationship, and the roller and the outer ring also form a direct transmission relationship, and the roller and the inner ring and the roller and the outer ring can be transmitted by one or more of various gears such as an involute gear, a cycloid gear, a magnetic gear and the like, and can also be transmitted by the cooperation of friction transmission and one or more gears; the required eccentricity distance is determined by sizing the rollers or sizing and distributing the rollers at an angle.

2. The method of claim 1, wherein: the inner ring of the eccentric bearing is integrated with or combined with a certain component of a mechanical device applying the eccentric bearing, or the outer ring is integrated with or combined with a certain component of a mechanical device applying the eccentric bearing, or the inner ring and the outer ring are respectively integrated with or combined with 2 components of the mechanical device applying the eccentric bearing.

3. The utility model provides a speed reducer or cycloidal pin gear speed reducer or few tooth difference speed reducer or RV speed reducer or differential type speed reducer which characterized in that: the reduction gear has at least the eccentric bearing according to claim 1.

4. The utility model provides a speed reducer or cycloidal pin gear speed reducer or few tooth difference speed reducer or RV speed reducer or differential type speed reducer which characterized in that: the reducer has at least the eccentric bearing according to claim 1, wherein an inner ring of the eccentric bearing is integrated or integrated with a certain member of the reducer, or an outer ring of the eccentric bearing is integrated or integrated with a certain member of the reducer, or the inner ring and the outer ring of the eccentric bearing are respectively integrated or integrated with 2 members of the reducer.

5. The utility model provides a speed reducer or cycloidal pin gear speed reducer or few tooth difference speed reducer or RV speed reducer or differential type speed reducer which characterized in that: the reducer has at least the eccentric bearing as described in claim 1, the inner ring of the eccentric bearing is integrated or combined with the sun shaft of the reducer, or the outer ring of the eccentric bearing is integrated or combined with the transmission member of the reducer for planetary motion, or the inner ring and the outer ring of the eccentric bearing are respectively integrated or combined with the sun shaft of the reducer and the transmission member for planetary motion.