CN216768240U - Two-stage cycloidal pin gear speed reducer - Google Patents
Two-stage cycloidal pin gear speed reducer Download PDFInfo
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- CN216768240U CN216768240U CN202122911017.0U CN202122911017U CN216768240U CN 216768240 U CN216768240 U CN 216768240U CN 202122911017 U CN202122911017 U CN 202122911017U CN 216768240 U CN216768240 U CN 216768240U
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- pin gear
- stage
- cycloidal
- gear
- eccentric shaft
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Abstract
The utility model discloses a secondary cycloidal pin gear speed reducer which comprises a primary cycloidal pin gear speed reducing component, a secondary cycloidal pin gear speed reducing component, an eccentric shaft and two main bearings, wherein the primary cycloidal pin gear speed reducing component comprises a primary pin gear and a primary cycloidal gear; the primary cycloid wheel and the secondary cycloid wheel are arranged on an eccentric shaft neck of the eccentric shaft and synchronously rotate on the eccentric shaft neck; a first main journal of the eccentric shaft is arranged in a shaft hole of the first-level pin wheel hub through a first main bearing, and a second main journal of the eccentric shaft is arranged in a shaft hole of the second-level pin wheel hub through a second main bearing. The utility model has simple structure and small volume, and is suitable for occasions with small space and large requirement on speed reduction.
Description
[ technical field ]
The utility model relates to a cycloid pin gear speed reducer, in particular to a two-stage cycloid pin gear speed reducer.
[ background art ]
The cycloidal pin wheel speed reducer is widely applied to various precise rotating discs, robot joints and other parts due to excellent transmission rigidity and precision, but the cycloidal pin wheel speed reducer is complex in structure, small in space of the robot joint part, generally only capable of adopting single-stage transmission, small in speed reduction ratio and poor in expansibility. The rotating speed of the high-speed servo and direct-current brushless motor breaks through again and again, and the high speed is the direction for improving the efficiency and the energy density of a prime motor, so that the speed ratio of the conventional single-stage cycloidal pin gear speed reducer cannot meet the speed reduction requirement of the high-speed motor, and the speed reduction of the two-stage cycloidal pin gear speed reducer is large, but the two-stage cycloidal pin gear speed reducer is difficult to apply to occasions with small space due to complex structure and large volume.
[ summary of the utility model ]
The utility model aims to provide a two-stage cycloidal pin gear speed reducer which is simple in structure and small in size.
In order to solve the technical problems, the utility model adopts the technical scheme that the two-stage cycloidal pin gear speed reducer comprises a first-stage cycloidal pin gear speed reducing component, a second-stage cycloidal pin gear speed reducing component, an eccentric shaft and two main bearings, wherein the first-stage cycloidal pin gear speed reducing component comprises a first-stage pin gear and a first-stage cycloidal gear, the second-stage cycloidal pin gear speed reducing component comprises a second-stage pin gear and a second-stage cycloidal gear, the first-stage pin gear and the second-stage pin gear are coaxial, and are arranged in a staggered mode along the axial direction and connected through the bearings; the primary cycloid wheel and the secondary cycloid wheel are arranged on an eccentric shaft neck of the eccentric shaft and synchronously rotate on the eccentric shaft neck; a first main journal of the eccentric shaft is arranged in a shaft hole of the first-level pin wheel hub through a first main bearing, and a second main journal of the eccentric shaft is arranged in a shaft hole of the second-level pin wheel hub through a second main bearing.
In the second-stage cycloidal pin gear speed reducer, the first-stage pin gear is used as the frame, the eccentric shaft is used as the input shaft, and the second-stage pin gear is used as the output shaft.
In the above-described second-stage cycloidal pin gear speed reducer, the diameter of the inner hole of the first-stage cycloidal gear is larger than that of the inner hole of the second-stage cycloidal gear, the first-stage cycloidal gear is coaxially fixed on the second-stage cycloidal gear, and the second-stage cycloidal gear is mounted on the eccentric journal of the eccentric shaft through a needle bearing.
In the second-stage cycloidal pin gear speed reducer, the first-stage pin gear comprises an end cover which is fixed on the axial side surface of the first-stage pin gear rim; the first main journal of the eccentric shaft is mounted in the shaft hole of the end cover through the first main bearing.
In the second-stage cycloidal pin gear speed reducer, the rim of the first-stage pin gear is loosely sleeved outside the second-stage pin gear and supported by the rim of the second-stage pin gear through the crossed roller bearing.
In the above two-stage cycloidal pin gear speed reducer, the inner periphery of the rim of the first-stage pin gear comprises the outer race track of the crossed roller bearing, and the outer periphery of the rim of the second-stage pin gear comprises the inner race track of the crossed roller bearing.
The secondary cycloidal pin wheel speed reducer is characterized in that the secondary cycloidal pin wheel speed reducing assembly comprises a balance block, and the balance block is fixed on the side surface of the secondary cycloidal wheel far away from the primary cycloidal wheel.
In the two-stage cycloidal pin gear speed reducer, the reduction ratio of the first-stage cycloidal pin gear speed reducing component is different from that of the second-stage cycloidal pin gear speed reducing component.
The two-stage cycloid pin gear speed reducer is simple in structure, small in size and suitable for occasions with small space and large speed reduction requirements.
[ description of the drawings ]
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic view of a transmission structure of a two-stage cycloidal pin gear speed reducer according to an embodiment of the utility model.
Fig. 2 is a sectional view of a two-stage cycloidal pin gear speed reducer according to an embodiment of the present invention.
[ detailed description of the utility model ]
The structure and the principle of the two-stage cycloidal pin gear speed reducer of the embodiment of the utility model are shown in fig. 1 and fig. 2, and the two-stage cycloidal pin gear speed reducer comprises a first-stage cycloidal pin gear speed reducing assembly 100, a second-stage cycloidal pin gear speed reducing assembly 200, an eccentric shaft 30, a main bearing 01 and a main bearing 02. The reduction ratio of the first stage cycloidal pin gear reduction assembly 100 is different from the reduction ratio of the second stage cycloidal pin gear reduction assembly 200.
The primary cycloidal pin gear speed reducing assembly 100 comprises a primary pin gear 10 and a primary cycloidal gear 11, and the secondary cycloidal pin gear speed reducing assembly 200 comprises a secondary pin gear 20, a secondary cycloidal gear 21 and a balancing block 24.
The primary pinwheel 10 comprises a rim 12, a plurality of pinwheel roller pins 13 and an end cover 14, wherein the end cover 14 is fixed on the axial side surface of the rim of the primary pinwheel 10. The first main journal 31 of the eccentric shaft 30 is mounted in the shaft hole 141 of the end cover 14 through the main bearing 01.
The secondary pinwheel 20 includes a rim 22 and a plurality of pinwheel needles 23, and the second main journal 32 of the eccentric shaft 30 is mounted in the shaft hole 221 of the hub of the rim 22 through the main bearing 02.
The first-stage pinwheel 10 and the second-stage pinwheel 20 are coaxial and are arranged in a staggered mode along the axial direction, the rim 12 of the first-stage pinwheel 10 is loosely sleeved outside the rim 22 of the second-stage pinwheel 20, the inner periphery of the rim 12 of the first-stage pinwheel is provided with an outer runway of the crossed roller bearing 03, and the outer periphery of the rim 22 of the second-stage pinwheel is provided with an inner runway of the crossed roller bearing 03. The primary pinwheel 10 is supported by the secondary pinwheel 20 through a cross roller bearing 03, and retains the relative rotational degrees of freedom along the axis while limiting the remaining degrees of freedom.
The secondary cycloidal gear 21 is mounted on an eccentric journal 33 of the eccentric shaft 30 by means of a needle bearing 04. The degree of freedom of the relative rotation of the primary cycloid gear 11 and the secondary cycloid gear 21 needs to be limited, including but not limited to the mode of fixedly connecting two cycloid gears or adopting a cross slide block and the like for transmission. In the present embodiment, the diameter of the inner hole of the primary cycloid wheel 11 is larger than the diameter of the inner hole of the secondary cycloid wheel 21, and the primary cycloid wheel 11 is coaxially fixed to the side of the secondary cycloid wheel 21.
The balance weight 24 is fixed on the side of the secondary cycloid wheel 21 away from the primary cycloid wheel 11.
As shown in fig. 1, when the two-stage cycloidal pin gear speed reducer according to the embodiment of the present invention operates, the first-stage pin gear 10 may be used as a frame, the main journal 31 of the eccentric shaft 30 may be used as an input shaft, and the second-stage pin gear 20 may be used as an output shaft.
The two-stage cycloid pin gear speed reducer provided by the embodiment of the utility model has the advantages of simple structure, good rigidity, small volume and long service life, and is suitable for occasions with small space and large speed reduction requirement.
Claims (8)
1. A two-stage cycloidal pin gear speed reducer comprises a one-stage cycloidal pin gear speed reducing assembly, a two-stage cycloidal pin gear speed reducing assembly, an eccentric shaft and two main bearings, wherein the one-stage cycloidal pin gear speed reducing assembly comprises a one-stage pin gear and a one-stage cycloidal gear; the primary cycloid wheel and the secondary cycloid wheel are arranged on an eccentric shaft neck of the eccentric shaft and synchronously rotate on the eccentric shaft neck; a first main journal of the eccentric shaft is arranged in a shaft hole of the first-level pin wheel hub through a first main bearing, and a second main journal of the eccentric shaft is arranged in a shaft hole of the second-level pin wheel hub through a second main bearing.
2. The two-stage cycloidal pin gear reducer of claim 1 in which the primary pin gear serves as the frame, the eccentric shaft serves as the input shaft, and the secondary pin gear serves as the output shaft.
3. The two-stage cycloidal pin gear speed reducer of claim 1, in which the diameter of the inner hole of the primary cycloidal gear is larger than that of the inner hole of the secondary cycloidal gear, the primary cycloidal gear is coaxially fixed on the secondary cycloidal gear, and the secondary cycloidal gear is mounted on the eccentric journal of the eccentric shaft through a needle bearing.
4. The two-stage cycloidal pin gear speed reducer of claim 1 in which the primary pin gear includes an end cap secured to an axial side of a rim of the primary pin gear; the first main journal of the eccentric shaft is mounted in the shaft hole of the end cover through the first main bearing.
5. The two-stage cycloidal pin gear reducer of claim 4 in which the rim of the primary pin gear is loosely fitted over the outside of the secondary pin gear and is supported by the rim of the secondary pin gear through crossed roller bearings.
6. The two-stage cycloidal pin gear reducer of claim 5 in which the inner periphery of the rim of the first stage pin gear includes an outer race track of crossed roller bearings and the outer periphery of the rim of the second stage pin gear includes an inner race track of crossed roller bearings.
7. The two-stage cycloidal pin gear reducer of claim 1 in which the two-stage cycloidal pin gear reduction assembly includes a counterweight secured to a side of the two-stage cycloidal gear remote from the one-stage cycloidal gear.
8. The two-stage cycloidal pin gear reducer of claim 1 in which the reduction ratio of the first stage cycloidal pin gear reduction assembly is different from the reduction ratio of the second stage cycloidal pin gear reduction assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122384483 | 2021-09-29 | ||
| CN2021223844838 | 2021-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216768240U true CN216768240U (en) | 2022-06-17 |
Family
ID=81963246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122911017.0U Active CN216768240U (en) | 2021-09-29 | 2021-11-24 | Two-stage cycloidal pin gear speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216768240U (en) |
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2021
- 2021-11-24 CN CN202122911017.0U patent/CN216768240U/en active Active
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