CN220727071U - Planetary gear reducer structure for driving balance motor shaft - Google Patents
Planetary gear reducer structure for driving balance motor shaft Download PDFInfo
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- CN220727071U CN220727071U CN202320759678.2U CN202320759678U CN220727071U CN 220727071 U CN220727071 U CN 220727071U CN 202320759678 U CN202320759678 U CN 202320759678U CN 220727071 U CN220727071 U CN 220727071U
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a planetary gear reducer structure for driving a balance motor shaft, which is characterized by comprising a dynamic balance motor shaft, a sun gear, a gear ring, a planetary gear, a needle bearing, a planetary gear positioning pin, a planetary carrier assembly, a bearing and a screw, wherein the end face of the input end of the dynamic balance motor shaft is provided with two balance holes, the unbalance of the original motor shaft caused by slotting and drilling is avoided to the greatest extent, the running stability of the motor shaft is enhanced, high dynamic balance can be kept when a high rotating speed is input, a stable running environment is provided for a gear train in a speed reducer, the meshing precision of gear transmission is guaranteed, meanwhile, vibration and noise are reduced, the stability is improved, and the service life of the whole machine is prolonged.
Description
Technical Field
The utility model relates to the technical field of planetary gears, in particular to a planetary gear reducer structure for driving a balance motor shaft.
Background
In order to facilitate clamping and loosening of the motor output shaft, the motor shaft is provided with two slots at the input end for contraction, and a screw hole is provided for installing a screw to clamp the motor output shaft. Since the slots and the bores are on the same side, the motor shaft is out of balance in the circumferential direction. Although the balance difference is reduced after the screws are arranged later, even a small balance difference can generate obvious vibration under the action of centrifugal force under the condition of higher input rotating speed, and the vibration is more obvious along with the increase of the input rotating speed. Such vibration not only produces loud noise but also seriously affects the stability and life of the speed reducer during high-speed operation, but the prior art products do not take countermeasures against the problem.
In order to solve the technical problems, the utility model provides a planetary gear reducer structure for driving a balance motor shaft, wherein two balance holes are drilled on the end face of the motor shaft under the condition that the structure is unchanged, and the diameter, depth, distribution circle diameter and distribution included angle of the two holes are obtained through accurate mechanical calculation. Thus, the motor shaft which is unbalanced originally can reach balance to the greatest extent after two balance holes are drilled. Therefore, when a higher rotating speed is input, the dynamic balance can still be kept very high, a stable running environment is provided for a gear train in the speed reducer, the meshing precision of gear transmission is guaranteed, meanwhile, vibration and noise are reduced, the stability is improved, and the service life of the speed reducer is prolonged.
Disclosure of Invention
The utility model aims to solve the problems that the slotting and the drilling are on the same side at present, so that the motor shaft loses balance in the circumferential direction, and the balance difference is reduced after the screws are arranged later, but even a small balance difference can generate obvious vibration under the action of centrifugal force under the condition of higher input rotating speed, and the vibration is more obvious along with the increase of the input rotating speed. Such vibrations not only can produce great noise and can seriously influence the stability and the life-span of speed reducer when high-speed operation, but the past product does not take the technical problem of corresponding measure to this problem, provides a planetary gear speed reducer structure who drives balanced motor axle and solves above-mentioned technical problem.
The utility model provides a drive planetary gear reducer structure of balanced motor axle which characterized in that: the planetary gear set is characterized by comprising a dynamic balance motor shaft, a sun gear, a gear ring, a planetary gear, a needle bearing, a planetary gear positioning pin, a planetary carrier assembly, a bearing and screws, wherein one end of the dynamic balance motor shaft is provided with a motor shaft sleeve, the other end of the dynamic balance motor shaft is provided with the sun gear, an a shrinkage groove, a b shrinkage groove and a mounting hole are formed in the outer portion of the motor shaft sleeve, the mounting hole consists of three parts including a counter bore, a threaded hole and a through hole, one end of the dynamic balance motor shaft sleeve is used as an input end, the mounting hole is arranged on the side face of the input end of the motor shaft sleeve, the end face of the input end of the dynamic balance motor shaft is provided with two balance holes, the two balance holes are oppositely arranged with the mounting hole, the two balance holes are in the shape of circular arcs, the circle center of the dynamic balance motor shaft coincides with the circle center of the dynamic balance motor shaft, the circle center of one balance hole is located on the central line of the b shrinkage groove in the X direction, three uniformly equidistant distributed planetary gear positioning pins are arranged in the planetary carrier assembly, the planetary carrier assembly is arranged on the middle of the three uniformly equidistant planetary gear positioning pins, the planetary gear positioning pin is arranged on the outer side of the gear positioning pin, the planetary gear set is arranged on the middle of the planetary carrier, the planetary carrier assembly is meshed with the planetary gear positioning pin, the planetary gear positioning assembly is arranged in the middle of the planetary gear positioning assembly, the planetary bearing is meshed with the planetary gear positioning assembly, the planetary bearing is arranged in the middle, the roller ball bearing is arranged in the middle, and the thrust ball bearing is meshed with the planetary bearing, the roller bearings are arranged in the axial bearings and the axial bearings.
Further, the needle bearing is located between the planet gear and the planet gear locating pin.
Further, the motor shaft sleeve clamps and fixes the dynamic balance motor shaft through the screw penetrating through the mounting hole.
Further, the screw is an inner hexagon screw.
Compared with the prior art, the utility model has the advantages that: the shaft sleeve is provided with an a shrinkage groove, a b shrinkage groove and a mounting hole for mounting a screw, two balance holes are drilled on the end face of the input end of the dynamic balance motor shaft, and a bearing mounting boss and a shaft shoulder are arranged at the middle position. During installation, the dynamic balance motor shaft is pressed into the sun gear rear outer sleeve bearing, and then is pressed into the planet carrier assembly, and meanwhile, the sun gear and the planet gears are meshed correctly. By adopting the structure, unbalance of the original dynamic balance motor shaft caused by slotting and drilling is avoided to the greatest extent, running stability of the dynamic balance motor shaft is enhanced, high dynamic balance can be kept when a high rotating speed is input, a stable running environment is provided for a gear train in a speed reducer, meshing precision of gear transmission is guaranteed, vibration and noise are reduced, stability is improved, and service life of the whole machine is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.
FIG. 1 is a cross-sectional view of a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a dynamic balance motor shaft and a motor shaft sleeve in a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model;
FIG. 3 is a front view of a motor shaft sleeve in a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model;
FIG. 4 is a perspective view of a dynamic balance motor shaft in a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model;
FIG. 5 is a perspective view of a dynamic balance motor shaft and a motor shaft sleeve in a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model;
in the accompanying drawings: 1. a dynamic balance motor shaft; 2. a sun gear; 3. a gear ring; 4. a planetary gear; 5. needle roller bearings; 6. planetary gear locating pins; 7. a planet carrier assembly; 8. a bearing; 9. a screw; 10. a motor shaft sleeve; 11. a balance hole; 101. a shrinkage groove; 102. b, a shrinkage groove; 103. a mounting hole; 1031. countersink; 1032. a threaded hole; 1033. a through hole; 1101. motor shaft sleeve mounting boss; 1102. bearing mounting bosses; 1103. and (5) a shaft shoulder.
Detailed Description
In view of the defects in the prior art, the technical scheme of the utility model is provided through long-term research and a large number of practices. The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Example 1
Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, fig. 1 is a structural cross-sectional view of a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model; fig. 2 is a schematic structural diagram of a dynamic balance motor shaft and a motor shaft sleeve in a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model; FIG. 3 is a front view of a motor shaft sleeve in a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model; FIG. 4 is a perspective view of a dynamic balance motor shaft in a planetary gear reducer structure for driving a balance motor shaft according to an embodiment of the present utility model; fig. 5 is a perspective view of a structure of a dynamic balance motor shaft and a motor shaft sleeve in a planetary gear reducer structure for driving a balance motor shaft, which is provided in an embodiment of the present utility model, and is characterized in that: comprises a dynamic balance motor shaft 1, a sun gear 2, a gear ring 3, a planetary gear 4, a needle bearing 5, a planetary gear positioning pin 6, a planetary carrier assembly 7, a bearing 8 and a screw 9, wherein one end of the dynamic balance motor shaft 1 is provided with a motor shaft sleeve 10, the other end of the dynamic balance motor shaft sleeve is provided with the sun gear 2, the outside of the motor shaft sleeve 10 is provided with an a shrinkage groove 101, a b shrinkage groove 102 and a mounting hole 103, the mounting hole consists of a counter bore 1031, a threaded hole 1032 and a through hole 1033, one end of the dynamic balance motor shaft 1 provided with the motor shaft sleeve 10 is an input end, the mounting hole 103 is positioned on the side surface of the input end of the motor shaft sleeve, the motor shaft sleeve 10 is assembled on the dynamic balance motor shaft 1 through the screw 9, the end surface of the input end of the dynamic balance motor shaft 1 is provided with two balance holes 11 which are oppositely arranged with the mounting hole 103, the two balance holes 11 are respectively in the shape of circular arcs, the circle center of the balance hole is coincident with the circle center of the dynamic balance motor shaft 1, the circle center of one balance hole 11 falls on the center line of the X direction of the b shrink groove 102, the included angle of the circle centers of the two balance holes 11 is 25 degrees to 45 degrees, the size and the distribution of the two balance holes 11 are determined according to the dynamic balance difference formed by the shrink groove, the mounting hole and the screw, the dynamic calculation can be obtained through the mechanical calculation, the mechanical calculation is the calculation well known in the art, the bearing 8 is arranged at the outer side of the middle part of the dynamic balance motor shaft 1 and is not described in detail, the bearing 8 is taken as a fulcrum to do rotary motion to drive the sun gear 2 matched with the bearing to rotate, then the planet carrier assembly 7 is driven to operate, three evenly equidistantly distributed planet gear positioning pins 6 are arranged in the planet gear assembly 7, the planet gears 4 are assembled on the planet gear positioning pins 6, the needle bearing 5 is assembled on the inner side of the planetary gear 4, the planetary gear 4 is meshed with the gear ring 3, the dynamic balance motor shaft 1 is pressed into the planetary carrier assembly 7, the sun gear 2 is meshed with the planetary gear 4, during installation, the dynamic balance motor shaft 1 is pressed into the sun gear 2, then the sleeve bearing 8 is sleeved, then the sleeve bearing is pressed into the planetary carrier assembly 7, and the sun gear 2 is correctly meshed with the planetary gear 4 after installation.
Preferably, the bearing 8 is a deep groove ball bearing, a self-aligning ball bearing or an angular contact bearing, and the bearing is selected according to the design operation condition, operation precision, load force and use condition.
Preferably, the needle roller bearing 5 is a tapered roller bearing, a cylindrical roller bearing or a thrust roller bearing, and the needle roller bearing is selected according to the design operation condition, the operation precision, the load force and the use condition.
Preferably, the motor shaft 1 is externally provided with a motor shaft sleeve mounting boss 1101, the motor shaft sleeve is arranged at the mounting bulge of the motor shaft sleeve, a bearing mounting boss 1102 and a shaft shoulder 1103 are arranged at the middle position, and the bearing is mounted on the bearing mounting boss and limited and positioned by the shaft shoulder.
It should be understood that the above embodiments are merely illustrative of the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and implement the same according to the technical concept and features, and are not intended to limit the scope of the present utility model. All simple modifications and substitutions made by the present utility model are intended to be included within the scope of the present utility model.
Claims (4)
1. The planetary gear reducer structure for driving balance motor shaft is characterized by comprising a dynamic balance motor shaft, a sun gear, a gear ring, a planetary gear, a needle bearing, a planetary gear positioning pin, a planetary carrier assembly, a bearing and a screw, wherein one end of the dynamic balance motor shaft is provided with a motor shaft sleeve, the other end of the dynamic balance motor shaft sleeve is provided with the sun gear, the outside of the motor shaft sleeve is provided with an a shrink groove, a b shrink groove and a mounting hole, the mounting hole consists of three parts of a counter bore, a threaded hole and a through hole, one end of the dynamic balance motor shaft sleeve is an input end, the mounting hole is positioned on the side surface of the input end of the motor shaft sleeve, the end surface of the input end of the dynamic balance motor shaft is provided with two balance holes which are oppositely arranged with the mounting hole, the two balance holes are in the shape of circular arcs, the circle center of the two balance holes coincides with the circle center of the dynamic balance motor shaft, the circle center of the two balance holes falls on the center line of the X direction of the b shrink groove, the included angle of the two balance holes is 25-45 DEG, the middle outer side of the dynamic balance motor shaft is provided with a bearing, the three uniform gear positioning pins are arranged in the planetary carrier assembly, the planetary gear positioning pin is arranged in the planetary carrier assembly or the planetary gear ball bearing is meshed with the planetary gear positioning pin, the planetary gear positioning pin is arranged in the planetary carrier assembly, the planetary gear positioning assembly is meshed with the planetary gear assembly, the planetary gear positioning ball bearing is meshed with the planetary gear assembly, the planetary gear positioning assembly is meshed with the planetary gear shaft, the planetary gear positioning assembly is meshed with the planetary bearing, and the planetary gear shaft is arranged. Bearing mounting bosses and shoulders are arranged at the middle positions.
2. The planetary gear reducer structure for driving a balance motor shaft according to claim 1, wherein: the needle bearing is positioned on the planetary gear and the planetary gear positioning pin.
3. The planetary gear reducer structure for driving a balance motor shaft according to claim 1, wherein: the motor shaft sleeve clamps and fixes the dynamic balance motor shaft through the screw penetrating through the mounting hole.
4. The planetary gear reducer structure for driving a balance motor shaft according to claim 1, wherein: the screw is an inner hexagon screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320759678.2U CN220727071U (en) | 2023-04-09 | 2023-04-09 | Planetary gear reducer structure for driving balance motor shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320759678.2U CN220727071U (en) | 2023-04-09 | 2023-04-09 | Planetary gear reducer structure for driving balance motor shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220727071U true CN220727071U (en) | 2024-04-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320759678.2U Active CN220727071U (en) | 2023-04-09 | 2023-04-09 | Planetary gear reducer structure for driving balance motor shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220727071U (en) |
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2023
- 2023-04-09 CN CN202320759678.2U patent/CN220727071U/en active Active
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