CN113389851B - Speed reducer pin retaining mechanism and RV speed reducer - Google Patents
Speed reducer pin retaining mechanism and RV speed reducer Download PDFInfo
- Publication number
- CN113389851B CN113389851B CN202110743909.6A CN202110743909A CN113389851B CN 113389851 B CN113389851 B CN 113389851B CN 202110743909 A CN202110743909 A CN 202110743909A CN 113389851 B CN113389851 B CN 113389851B
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- pin
- gear
- pin gear
- annular boss
- speed reducer
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 title claims abstract description 18
- 230000009467 reduction Effects 0.000 claims description 15
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 3
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention discloses a speed reducer pin retaining mechanism and an RV speed reducer, belongs to the technical field of speed reducers, and aims to solve the problems that a pin gear pin is easy to fall off from a pin gear shell, a bulge is additionally arranged at the edge of a pin groove, stress concentration is easy to cause, and the edge of the pin groove is easy to damage, so that the speed reducer is unstable in work. The invention provides a speed reducer pin holding mechanism, comprising: a pin gear pin; the pin gear comprises a pin gear shell, wherein two bearing mounting holes with opposite mounting directions are formed in the pin gear shell, an annular boss is arranged between the two bearing mounting holes, a plurality of pin gear pin grooves which are uniformly arranged and axially extend are formed in the annular boss along the circumferential direction, and a pin gear pin is arranged in each pin gear pin groove to form an internal tooth structure; and the two side surfaces of the annular boss are respectively provided with the pin gear pin retaining members. The invention can prevent noise generated by radial inclination of the pin gear when the RV reducer operates by arranging the pin gear pin holding component, and simultaneously, the pin gear pin holding component can reduce vibration and noise.
Description
Technical Field
The invention relates to the field of speed reducers, in particular to a speed reducer pin retaining mechanism and an RV speed reducer.
Background
The planetary cycloidal reducer (RV reducer) is mainly a novel cycloidal pin gear planetary transmission formed by primary planetary gear 62 transmission and secondary cycloidal pin gear transmission, is mainly applied to the joint part of an industrial robot, and provides the requirements of high transmission precision, small return difference, high rigidity, strong shock resistance, compact structure, high transmission efficiency and the like for the planetary cycloidal reducer. These requirements all put high demands on the machining precision and the mounting precision of parts. When the pin gear pin is in meshing transmission with the cycloid wheel, only part of the pin gear pin is in meshing contact with and stressed on the outer teeth of the cycloid wheel, and the other part of the pin gear pin is not in meshing stress on the outer teeth of the cycloid wheel.
The reduction gear among the prior art also adopts a structure restriction round pin axle to drop, and this reduction gear includes: a housing having a plurality of pin grooves extending in an axial direction at an inner periphery; a plurality of pin teeth pins disposed in the plurality of pin grooves, respectively; a plurality of oscillating gears having external teeth with a smaller number of teeth than the pin grooves, the oscillating gears being arranged inside the housing in an axial direction and rotating while meshing with the internal gear pins in accordance with input rotation; and drop-off prevention means that protrudes radially inward of the housing from an edge of each pin groove and prevents the internal gear pins from dropping off, wherein a plurality of internal gear pins are arranged in each pin groove so as to mesh with the external teeth of each oscillation gear independently. Although the edge of the pin slot of the speed reducer can limit the pin gear to fall off, the raised edge is easy to concentrate stress, and the pin gear meshing force can cause the damage of the edge of the slot, thereby causing the unstable operation of the speed reducer.
Disclosure of Invention
In view of the above, the invention discloses a reduction gear pin retaining mechanism and an RV reduction gear, which are used for solving the problems that a pin is easy to fall off from a pin gear shell, the edge of a pin groove is additionally provided with a bulge, stress concentration is easy to cause, and the edge of the pin groove is easy to damage, so that the work of the reduction gear is unstable.
In order to achieve the above object, the invention adopts the following technical scheme:
the present invention in a first aspect discloses a reduction gear pin holding mechanism, including: a pin gear pin; the pin gear structure comprises a pin gear shell, wherein two bearing mounting holes with opposite mounting directions are formed in the pin gear shell, an annular boss is arranged between the two bearing mounting holes, a plurality of pin gear pin grooves which are uniformly arranged and axially extend are formed in the annular boss along the circumferential direction, and a pin gear pin is arranged in each pin gear pin groove to form an internal tooth structure; the pin gear pin retaining members are respectively arranged on two side surfaces of the annular boss, and each pin gear pin is arranged on the two pin gear pin retaining members so that the pin gear pin can only rotate around the axis of the pin gear pin.
Furthermore, two side surfaces of the annular boss are respectively provided with an annular gap concentric with the annular boss, and the width of the annular gap is larger than or equal to the thickness of the pin gear pin holding component.
Further, the pin holding member has a ring plate shape.
Further, the pin holding member is made of any one of nylon, polytetrafluoroethylene, nodular cast iron, polyamide, polyimide, and polyether ether ketone.
Furthermore, each pin gear pin retaining member is provided with a plurality of pin gear pin holes along the circumferential direction of the bearing mounting hole, two ends of each pin gear pin are respectively provided with a bulge matched with the pin gear pin holes, and the bulge on each pin gear pin is respectively arranged in the pin gear pin hole of each pin gear pin retaining member.
Further, the protrusion is a cylindrical protrusion, and the diameter of the cylindrical protrusion is smaller than that of the pin gear pin.
Further, the cylindrical protrusion is disposed coaxially with the pin gear pin.
Further, the length of the projection on each pin tooth is less than or equal to the depth of the pin tooth pin hole.
The invention discloses an RV reducer in a second aspect, which comprises the reducer pin gear pin retaining mechanism in the first aspect.
Further, two bearing mounting holes of the pin gear shell are respectively provided with a bearing, one end face of each bearing is flatly attached to the side face of the annular boss, and the outer ring of each bearing is pressed on the pin gear pin retaining member.
Has the advantages that: according to the invention, the pin gear pin retaining members are arranged at the two ends of the pin gear pin, and each pin gear pin is limited in the pin gear pin retaining member, so that when the RV reducer works, the pin gear pin is stably retained in the pin gear pin groove, and the problems that the pin gear pin is separated from the pin gear pin groove due to vibration and impact or the pin gear pin collides with the cycloid wheel are avoided; while the presence of the pin holding member can absorb certain vibrations.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
FIG. 1 shows a schematic diagram of example 1;
FIG. 2 shows an enlarged view of a portion of FIG. 1 at I;
fig. 3 shows a schematic view of a pin holding member in embodiment 1;
fig. 4 shows a schematic view of the needle pin in embodiment 1;
fig. 5 shows a schematic view of the needle housing in embodiment 1;
fig. 6 shows a schematic diagram of an RV reducer in embodiment 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "the plural" typically includes at least two, but does not exclude the presence of at least one.
It should be understood that the term "and/or" as used herein is merely a relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
To further illustrate the technical solution of the present invention, the following specific examples are provided with reference to fig. 1 to 6.
Example 1
In the present embodiment, there is provided a reduction gear pin holding mechanism, as shown in fig. 1 to 5, including: a pin gear 10; the pin gear shell 20 is provided with two bearing mounting holes 21 with opposite mounting directions, an annular boss 22 is arranged between the two bearing mounting holes 21, the annular boss 22 is provided with a plurality of pin gear pin grooves 23 which are uniformly arranged and axially extend along the circumferential direction, and each pin gear pin groove 23 is internally provided with a pin gear pin 10 to form an internal tooth structure; a pin gear retaining member 30, wherein the pin gear retaining members 30 are respectively arranged on two side surfaces of the annular boss 22, and each pin gear 10 is arranged on the two pin gear retaining members 30, so that the pin gear 10 can only rotate around the axis thereof.
Preferably, the pin holding member 30 has a ring plate shape.
Each bearing mounting hole 21 is internally provided with a bearing 40, and the two bearings 40 are attached to the annular boss to fix the pin holding member 30.
Preferably, in order to prevent the inner ring of the bearing 40 from wearing the pin gear pin retaining member 30, two side surfaces of the annular boss 22 are respectively provided with an annular notch 24 concentric with the annular boss 22, the width of the annular notch 24 is greater than or equal to the thickness of the pin gear pin retaining member 30, the pin gear pin retaining member 30 is made to avoid the bearing 40 by the annular notch 24, and the installation position of the bearing 40 is also ensured.
Preferably, in order to better confine the pin gear 10 between two pin gear retaining members 30, each pin gear retaining member 30 is provided with a plurality of pin gear pin holes 31 along the circumferential direction, the two ends of the pin gear 10 are respectively provided with protrusions 11 engaged with the pin gear pin holes 31, and the protrusions 11 of each pin gear 10 are respectively installed in the pin gear pin holes 31 of each pin gear retaining member 30.
Preferably, the protrusion 11 is a cylindrical protrusion having a diameter smaller than that of the pin gear 10, so that the pin gear 10 is confined between the two pin gear retaining members 30, thereby preventing the occurrence of abnormal noise and abrasion due to impact and collision with the outer teeth of the RV cycloidal gear from the pin gear groove in a radial direction during the operation of the RV reducer.
Preferably, the cylindrical protrusion is coaxially disposed with the pin 10.
Preferably, the length of the protrusion 11 on each pin 10 is less than or equal to the depth of the pin hole 31, and the length of the protrusion 11 indicates the length of the pin 10 in the axial direction.
In order to improve the wear resistance of the pin retaining member 30, the pin retaining member 30 may be made of any one of nylon, polytetrafluoroethylene, ductile iron, polyamide, polyimide, and polyetheretherketone, wherein nylon and polytetrafluoroethylene are preferred materials in this embodiment.
In this embodiment, the protruding parts at the two ends of the pin gear 10 are embedded into the holes of the pin gear holding member 30, and the pin gear holding member 30 is used for restraining the radial inclination of the pin gear from falling off, so that the pin gear 10 can be vertically fixed in the pin gear groove 23, abnormal wear and vibration are reduced, the pin gear meshing is more stable, and the purpose of prolonging the service life of the planetary cycloidal reducer is achieved. Meanwhile, the pin retaining member 30 is made of a high-strength nylon material or polytetrafluoroethylene, has high wear resistance, corrosion resistance and fatigue resistance, is light in weight, and can absorb impact well to achieve the purposes of slowing down the internal vibration of the planetary cycloidal reducer and reducing noise.
Example 2
The present embodiment discloses an RV reducer, as shown in fig. 6, including a reducer pin holding mechanism as described in embodiment 1.
The two bearing mounting holes 21 of the pin gear housing 20 are respectively mounted with bearings 40, one end face of each bearing 40 is flatly arranged against the side face of the annular boss 22, the outer ring of the bearing 40 is pressed on the pin gear retaining member 30, the two bearings 40 fix the two pin gear retaining members 30 to further limit the axial movement of the pin gear 10, and the pin gear 10 is mounted on the pin gear retaining member 30 to limit the radial movement of the pin gear 10.
The RV reducer in this embodiment specifically further includes an RV cycloidal gear 50, a crankshaft 60, a planetary carrier 61, a planetary gear 62, a rigid disk 63, a sun gear, and a central shaft (the sun gear and the central shaft are not shown in fig. 6); the RV cycloidal gear 50 is provided with a plurality of pin gear slots a which are uniformly arranged along the axial direction and extend along the axial direction on the outer circumference, teeth are formed between two adjacent pin gear slots a, the number of the pin gears 10 is one more than that of the teeth, the side surface of the RV cycloidal gear 50 is provided with holes matched with the crankshaft 60 along the circumferential direction, the RV cycloidal gear 50 is arranged in the pin gear shell 20, the RV cycloidal gear 50 is matched with the pin gears 10 through the pin gear slots a, the planet wheel carrier 61 is rotatably installed on the pin gear shell 20 from one side of the pin gear shell 20 through a bearing 40, the rigid disk 63 is rotatably installed on the pin gear shell 20 from the other side of the pin gear shell 20 through a bearing 40, the rigid disk 63 and the planet wheel carrier 61 are fixedly connected through a screw and a positioning pin to form a planet wheel carrier 61 assembly, the planet wheel carrier 61 is rotatably installed with a plurality of crankshafts 60 which are uniformly arranged along the circumferential direction, wherein the crankshaft 60 with install tapered roller bearing 65 between the planet carrier 61, the eccentric section of crankshaft 60 is located RV cycloid wheel 50's downthehole, the diameter in RV cycloid wheel 50's hole is greater than the shaft diameter of the eccentric section of crankshaft 60, and the tip fixed mounting of every crankshaft 60 has planetary gear 62, and planetary gear 62's center is equipped with the sun gear rather than the meshing, and sun gear fixed mounting is on the center shaft, the center shaft rotate install in the pinion housing 20. Wherein the eccentric section of the crankshaft 60 is provided with a needle bearing 70, and the needle bearing 70 is arranged in a hole on the side surface of the RV cycloidal gear 50, so that the abrasion of the surface of the crankshaft 60 is avoided in the rotating process of the crankshaft 60.
In this embodiment, the central shaft can serve as an input end to drive the planetary carrier 61 to rotate, and at the same time, the crankshaft 60 rotates once to make the RV cycloidal gear 50 travel one tooth on the internal tooth structure to realize speed reduction, wherein the planetary carrier 61 assembly serves as an output end.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (9)
1. A reduction gear pin holding mechanism, characterized by comprising:
a pin gear pin;
the pin gear comprises a pin gear shell, wherein two bearing mounting holes with opposite mounting directions are formed in the pin gear shell, an annular boss is arranged between the two bearing mounting holes, a plurality of pin gear pin grooves which are uniformly arranged and axially extend are formed in the annular boss along the circumferential direction, and a pin gear pin is arranged in each pin gear pin groove to form an internal tooth structure;
the two side surfaces of the annular boss are respectively provided with a pin gear pin retaining member, and each pin gear pin is arranged on the two pin gear pin retaining members so that the pin gear pins can only rotate around the own axis;
the two side surfaces of the annular boss are respectively provided with an annular notch which is concentric with the annular boss, the needle tooth pin retaining component is positioned in the annular notch, and the width of the annular notch is larger than or equal to the thickness of the needle tooth pin retaining component.
2. The reduction gear pin holding mechanism according to claim 1, wherein the pin holding member is in a ring plate shape.
3. The reduction box pin retaining mechanism according to claim 1, wherein the pin retaining member is made of any one of nylon, polytetrafluoroethylene, ductile iron, polyamide, polyimide, and polyetheretherketone.
4. The reduction gear pin holding mechanism according to any one of claims 1 to 3, wherein each pin gear pin holding member is provided with a plurality of pin gear pin holes along a circumferential direction of the bearing mounting hole, the two ends of the pin gear pin are respectively provided with a protrusion which is engaged with the pin gear pin holes, and the protrusion of each pin gear pin is respectively mounted in the pin gear pin hole of each pin gear pin holding member.
5. The reduction box pin retaining mechanism according to claim 4, wherein the protrusion is a cylindrical protrusion, and a diameter of the cylindrical protrusion is smaller than a diameter of the pin.
6. The reduction box pin retaining mechanism according to claim 5, wherein the cylindrical projection is provided coaxially with the pin.
7. The reduction box pin retaining mechanism of claim 6, wherein the length of the projection on each pin is less than or equal to the depth of the pin hole.
8. An RV reducer characterized by comprising the reducer pintooth pin holding mechanism as claimed in any one of claims 1 to 7.
9. The RV reducer according to claim 8, wherein bearings are mounted in the two bearing mounting holes of said pin gear case, respectively, one end surface of each bearing is disposed flush with the side surface of said annular boss, and the outer ring of each bearing is pressed against said pin gear pin holding member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110743909.6A CN113389851B (en) | 2021-07-01 | 2021-07-01 | Speed reducer pin retaining mechanism and RV speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110743909.6A CN113389851B (en) | 2021-07-01 | 2021-07-01 | Speed reducer pin retaining mechanism and RV speed reducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113389851A CN113389851A (en) | 2021-09-14 |
| CN113389851B true CN113389851B (en) | 2022-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110743909.6A Active CN113389851B (en) | 2021-07-01 | 2021-07-01 | Speed reducer pin retaining mechanism and RV speed reducer |
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| Country | Link |
|---|---|
| CN (1) | CN113389851B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105299186A (en) * | 2015-11-17 | 2016-02-03 | 天津百利机械装备研究院有限公司 | Needle tooth positioning device of RV reducer |
| CN206036135U (en) * | 2015-10-13 | 2017-03-22 | 范正富 | Inner gearing drive mechanism and interior wheel thereof |
| CN207333646U (en) * | 2017-07-24 | 2018-05-08 | 刘海燕 | A kind of elasticity needle roller structure and gapless teeth-adjustable reducer |
| CN209638325U (en) * | 2019-01-28 | 2019-11-15 | 湖北斯微特传动有限公司 | Miniature reducer with big speed ratio |
-
2021
- 2021-07-01 CN CN202110743909.6A patent/CN113389851B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206036135U (en) * | 2015-10-13 | 2017-03-22 | 范正富 | Inner gearing drive mechanism and interior wheel thereof |
| CN106567911A (en) * | 2015-10-13 | 2017-04-19 | 范正富 | Inner gearing transmission mechanism |
| CN105299186A (en) * | 2015-11-17 | 2016-02-03 | 天津百利机械装备研究院有限公司 | Needle tooth positioning device of RV reducer |
| CN207333646U (en) * | 2017-07-24 | 2018-05-08 | 刘海燕 | A kind of elasticity needle roller structure and gapless teeth-adjustable reducer |
| CN209638325U (en) * | 2019-01-28 | 2019-11-15 | 湖北斯微特传动有限公司 | Miniature reducer with big speed ratio |
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| Publication number | Publication date |
|---|---|
| CN113389851A (en) | 2021-09-14 |
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