CN214838330U - Miniaturized planetary gear transmission mechanism based on duplicate gear - Google Patents

Miniaturized planetary gear transmission mechanism based on duplicate gear Download PDF

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Publication number
CN214838330U
CN214838330U CN202023319582.XU CN202023319582U CN214838330U CN 214838330 U CN214838330 U CN 214838330U CN 202023319582 U CN202023319582 U CN 202023319582U CN 214838330 U CN214838330 U CN 214838330U
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China
Prior art keywords
planetary gear
gear
planetary
miniaturized
rotating shaft
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CN202023319582.XU
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Chinese (zh)
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毛风翔
李朝钦
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Lubao Technology Shanghai Co ltd
Kuanyi Precision Industrial Kunshan Co ltd
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Lubao Technology Shanghai Co ltd
Kuanyi Precision Industrial Kunshan Co ltd
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Abstract

The utility model discloses a miniaturized planetary gear transmission mechanism based on a duplicate gear, which comprises a central shaft, a central gear, a planetary support, a planetary gear assembly and an internal tooth steel ring; the planetary gear assembly is provided with a plurality of equal-angle annular assemblies and is assembled on the planetary support, the planetary gear assembly comprises a supporting rotating shaft, a small planetary gear positioned at one end of the supporting rotating shaft and a large planetary gear fixedly assembled at the other end of the supporting rotating shaft, and the supporting rotating shaft is rotatably assembled in an assembling hole in the planetary support through a pair of bearings; the central gear and the planetary support are fixedly sleeved on the central shaft, the big planetary gear is meshed with the external teeth of the central gear, and the small planetary gear is meshed with the internal teeth of the internal gear ring. The utility model discloses can realize two kinds of different material planetary gear's assembly, when can ensure great moment of torsion transmission, realize miniaturization, lightweight design.

Description

Miniaturized planetary gear transmission mechanism based on duplicate gear
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of in-wheel motor, especially, relate to a miniaturized planetary gear drive mechanism based on duplicate gear.
[ background of the invention ]
The principle of the planetary reduction gear is a power transmission mechanism that uses a gear speed converter to reduce the number of revolutions of a motor to a desired number of revolutions and obtain a large torque. The gear with less teeth on the transmission shaft of the planetary reducer is meshed with the big gear on the output shaft to achieve the purpose of speed reduction. With the continuous rapid development of the planetary reducer industry, more and more industries and different enterprises use the planetary reducer.
In the prior art, a large planetary gear and a small planetary gear are in a conjoined wheel structure, and are processed by an integrated machine tool or a die, the large planetary gear and the small planetary gear in the structure can only be made of the same material, under the condition of needing larger torque, the small planetary gear needs to be made of a high-strength metal material, and if the large planetary gear is made of the metal material, the weight of a middle body is heavier, the light weight is not facilitated, and the noise is larger; if the big planetary gear and the small planetary gear are made of light plastics, the torque of the small planetary gear is insufficient, and if the torque requirement is required to be ensured, the diameter of the small planetary gear needs to be increased, which is not beneficial to miniaturization design; and the planet carrier supporting the conjoined gear is supported by bearings arranged at two outer end parts in the axial direction of the two gears. The above structure has the following drawbacks: 1) the conjoined gear needs to be supported from two ends, so that the whole size is large, and the miniaturization design is not facilitated; 2) the big planetary gear and the small planetary gear can only adopt the same material, and can not meet the requirements of larger torque and light weight at the same time.
Therefore, it is necessary to provide a miniaturized planetary gear transmission mechanism based on a duplicate gear to solve the above problems.
[ Utility model ] content
The utility model discloses a main aim at provides a miniaturized planetary gear drive mechanism based on duplicate gear can realize two kinds of different material planetary gear's assembly, when can ensure great moment of torsion transmission, realizes miniaturization, lightweight design.
The utility model discloses a following technical scheme realizes above-mentioned purpose: a miniaturized planetary gear transmission mechanism based on a duplicate gear comprises a central shaft, a central gear, a planetary support, a planetary gear assembly and an internal gear ring; the planetary gear assembly is provided with a plurality of equal-angle annular assemblies and is assembled on the planetary support, the planetary gear assembly comprises a supporting rotating shaft, a small planetary gear positioned at one end of the supporting rotating shaft and a large planetary gear fixedly assembled at the other end of the supporting rotating shaft, and the supporting rotating shaft is rotatably assembled in an assembling hole in the planetary support through a pair of bearings; the central gear and the planetary support are fixedly sleeved on the central shaft, the big planetary gear is meshed with the external teeth of the central gear, and the small planetary gear is meshed with the internal teeth of the internal gear ring.
Furthermore, the asteroid gear and the supporting rotating shaft are of an integral structure.
Further, the small planetary gear and the large planetary gear are arranged at two ends of the supporting rotating shaft, and the bearing is located between the small planetary gear and the large planetary gear.
Furthermore, the planet carrier comprises a shaft sleeve part fixedly sleeved on the central shaft and a supporting plate face part positioned at one end of the shaft sleeve part and with a diameter larger than that of the shaft sleeve part, and the planet gear assembly is annularly assembled on the supporting plate face part at an equal angle.
Further, the support plate surface portion is provided with a reinforcing protrusion portion for increasing the plate thickness in the region of the fitting hole.
Furthermore, an avoiding groove is formed in the surface of one side, facing the planet support, of the large planet gear, and the reinforcing protrusion portion is embedded in the avoiding groove in a copying mode.
Furthermore, the shaft sleeve part of the planet carrier is embedded in the inner gear ring.
Furthermore, a bearing limit surface is formed on one axial end surface of the asteroid gear; a limiting isolation gasket for limiting the outer rings of the two bearings is arranged between the two bearings; and an annular bulge part for limiting and blocking the inner ring of the bearing is arranged in the avoiding groove.
Furthermore, the shaft section of the supporting rotating shaft assembled with the big planetary gear is set as a spline shaft, and the central hole of the big planetary gear is a spline hole matched with the spline shaft.
Furthermore, the planetary gear assembly is provided with three groups, and the total number of the three small planetary gears and the three large planetary gears is three.
Compared with the prior art, the utility model relates to a miniaturized planetary gear transmission based on duplicate gear's beneficial effect lies in: by skillfully designing a planetary carrier structure, a supporting rotating shaft integrated with a minor planetary gear is used for connecting the minor planetary gear and a major planetary gear together to form a planetary gear assembly, and then the planetary gear assembly is assembled on a planetary carrier through an intermediate bearing, on one hand, a structural foundation is provided for realizing the processing and assembly of the planetary gears made of two materials, the end of the minor planetary gear is made of a high-strength metal material, and then the end of the major planetary gear is made of a light material, so that the large output torque can be met, the light design requirement can also be met, and the integral weight of a transmission mechanism is greatly reduced; on the other hand, the planet support extends into the space between the large planet gear and the small planet gear, the large planet gear and the small planet gear are rotatably supported in a bearing built-in mode, and the structure design that the reinforced convex part on the planet support and the large planet gear are provided with the avoidance grooves is matched, so that the meshing of all the gears is limited in the length range of the supporting rotating shaft in the axial direction, the axial size is greatly shortened, the space is saved, and the miniaturized structure design is realized.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic partial structure diagram of an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the planetary gear transmission according to the present invention;
the figures in the drawings represent:
100 a miniaturized planetary gear transmission mechanism based on a duplicate gear;
1 central shaft; 2 a central gear; 3 planet support, 31 assembly hole, 32 shaft sleeve part, 33 support plate surface part and 34 strengthening convex part; 4, a planetary gear assembly, 41 supporting rotating shafts, 411 spline shafts, 42 small planetary gears, 43 large planetary gears, 44 bearings, 45 avoiding grooves, 451 annular convex parts and 46 limiting isolation gaskets; 5 an internal gear ring.
[ detailed description ] embodiments
The first embodiment is as follows:
referring to fig. 1 to 3, the present embodiment is a miniaturized planetary gear transmission mechanism 100 based on dual gears, which includes a central shaft 1, a central gear 2, a planetary carrier 3, a planetary gear assembly 4 and an internal gear ring 5; the planetary gear assembly 4 is provided with a plurality of equal-angle annular assemblies and is assembled on the planetary carrier 3, the planetary gear assembly 4 comprises a supporting rotating shaft 41, a small planetary gear 42 positioned at one end of the supporting rotating shaft 41 and a large planetary gear 43 fixedly assembled at the other end of the supporting rotating shaft 41, and the supporting rotating shaft 41 is rotatably assembled in an assembling hole 31 on the planetary carrier 3 through a pair of bearings 44; the central gear 2 and the planet support 3 are fixedly sleeved on the central shaft 1, the large planet gear 43 is meshed with the external teeth of the central gear 2, and the small planet gear 42 is meshed with the internal teeth of the internal gear ring 5.
The pinion gear 42 is integrated with the support shaft 41. The small planetary gear 42 and the large planetary gear 43 are provided at both ends of the support rotating shaft 41, and the bearing 44 is located between the small planetary gear 42 and the large planetary gear 43.
The planet carrier 3 comprises a shaft sleeve part 32 fixedly sleeved on the central shaft 1 and a supporting plate face part 33 which is positioned at one end of the shaft sleeve part 32 and has a diameter larger than that of the shaft sleeve part 32, and the planet gear assembly 4 is annularly assembled on the supporting plate face part 33 at equal angles.
The support plate surface portion 33 is provided with a reinforcing protrusion 34 that increases the plate thickness in the region of the attachment hole 31. The side surface of the big planetary gear 43 facing the planetary carrier 3 is provided with an avoiding groove 45, and the reinforcing convex part 34 is embedded in the avoiding groove 45 in a profiling way. Through the structure cooperation design of strengthening the bellying 34 and dodging recess 45, can satisfy the gear on the one hand and support the intensity demand, on the other hand can effectually reduce the axial assembly space of overall structure, has established the great basis for the whole volume that has reduced planetary transmission.
In addition, the shaft sleeve part 32 of the planet carrier 3 is embedded in the inner gear ring 5, and the axial overall size of the planet transmission mechanism is further reduced.
An axial end face of the pinion gear 42 forms a bearing stopper face (not shown) that stops the inner race of one of the bearings 44. A spacing isolation gasket 46 is disposed between the two bearings 44, and the spacing isolation gasket 46 is used for spacing the outer rings of the two bearings 44 and stabilizing the interval between the two bearings 44. An annular convex part 451 is arranged in the avoiding groove 45, the annular convex part 451 is used for limiting and blocking the inner ring of the other bearing 44, and the two bearings 44 are fixed through the bearing limiting surface, the annular convex part 451 and the limiting isolation gasket 46.
The embodiment can be applied to the hub motor of the electric vehicle, and the overall performance of the hub motor is improved. When in use, the small planetary gear 42 can be made of metal gears, and the large planetary gear 43 can be made of other metal gears or engineering plastic gears.
In this embodiment, the planetary gear assembly 4 has three sets, and there are three small planetary gears 42 and three large planetary gears 43 to form a dual gear.
In order to ensure that the large planet gear 43 and the small planet gear 42 can form an integral planet gear assembly after assembly, ensure that the tooth form angles of the large planet gear 43 and the small planet gear 42 correspond to each other according to a set position and synchronously rotate, and prevent the locking phenomenon. In this embodiment, the shaft section where the support rotating shaft 41 and the large planetary gear 43 are assembled is set as a spline shaft 411, and the central hole of the large planetary gear 43 is a spline hole matched with the spline shaft 411. Through the technical treatment of spline fit, the corresponding angle between the big planetary gear 43 and the small planetary gear 42 is ensured, the smooth operation is ensured, and the locking is prevented.
In the embodiment, by skillfully designing the planet carrier structure, the small planet gear and the large planet gear are connected together by using a supporting rotating shaft which is in an integrated structure with the small planet gear to form a planet gear assembly, and then the planet gear assembly is assembled on the planet carrier through the intermediate bearing, on one hand, a structural basis is provided for realizing the processing and the assembly of the planet gears made of two materials, the end of the small planet gear is made of a high-strength metal material, and then the end of the large planet gear is made of a light material, so that the large planet gear can meet the requirements of large output torque and light weight design, and the whole weight of the transmission mechanism is greatly reduced; on the other hand, the planet support extends into the space between the large planet gear and the small planet gear, the large planet gear and the small planet gear are rotatably supported in a bearing built-in mode, and the structure design that the reinforced convex part on the planet support and the large planet gear are provided with the avoidance grooves is matched, so that the meshing of all the gears is limited in the length range of the supporting rotating shaft in the axial direction, the axial size is greatly shortened, the space is saved, and the miniaturized structure design is realized.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims (10)

1. The utility model provides a miniaturized planetary gear drive mechanism based on duplicate gear which characterized in that: the planetary gear set comprises a central shaft, a central gear, a planetary support, a planetary gear assembly and an internal gear ring; the planetary gear assembly is provided with a plurality of equal-angle annular assemblies and is assembled on the planetary support, the planetary gear assembly comprises a supporting rotating shaft, a small planetary gear positioned at one end of the supporting rotating shaft and a large planetary gear fixedly assembled at the other end of the supporting rotating shaft, and the supporting rotating shaft is rotatably assembled in an assembling hole in the planetary support through a pair of bearings; the central gear and the planetary support are fixedly sleeved on the central shaft, the big planetary gear is meshed with the external teeth of the central gear, and the small planetary gear is meshed with the internal teeth of the internal gear ring.
2. A dual gear based miniaturized planetary gear transmission according to claim 1, wherein: the small planetary gear and the supporting rotating shaft are of an integrated structure.
3. A dual gear based miniaturized planetary gear transmission according to claim 1, wherein: the small planetary gear and the large planetary gear are arranged at two ends of the supporting rotating shaft, and the bearing is positioned between the small planetary gear and the large planetary gear.
4. A dual gear based miniaturized planetary gear transmission according to claim 1, wherein: the planet carrier is established including fixed cover epaxial axle sleeve portion, be located axle sleeve portion one end and diameter are greater than the backup pad face portion of axle sleeve portion, the assembly of the equal angle of planetary gear assembly annular is in on the backup pad face portion.
5. A miniaturized planetary gear train based on duplicate gears as in claim 4, wherein: the support plate surface portion is provided with a reinforcing protrusion portion for increasing the plate thickness in the region of the fitting hole.
6. A miniaturized planetary gear train based on duplicate gears as in claim 5, wherein: an avoiding groove is formed in the surface of one side, facing the planet support, of the large planet gear, and the reinforcing convex part is embedded in the avoiding groove in a copying mode.
7. A miniaturized planetary gear train based on duplicate gears as in claim 4, wherein: the shaft sleeve part of the planet support is embedded in the inner gear ring.
8. A miniaturized planetary gear train based on duplicate gears as in claim 6, wherein: a bearing limiting surface is formed on one axial end surface of the asteroid gear; a limiting isolation gasket for limiting the outer rings of the two bearings is arranged between the two bearings; and an annular bulge part for limiting and blocking the inner ring of the bearing is arranged in the avoiding groove.
9. A dual gear based miniaturized planetary gear transmission according to claim 1, wherein: the shaft section of the supporting rotating shaft assembled with the big planetary gear is set to be a spline shaft, and the central hole of the big planetary gear is a spline hole matched with the spline shaft.
10. A dual gear based miniaturized planetary gear transmission according to claim 1, wherein: the planetary gear assembly is provided with three groups, and the total number of the three small planetary gears and the three large planetary gears is three.
CN202023319582.XU 2020-12-31 2020-12-31 Miniaturized planetary gear transmission mechanism based on duplicate gear Active CN214838330U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023319582.XU CN214838330U (en) 2020-12-31 2020-12-31 Miniaturized planetary gear transmission mechanism based on duplicate gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023319582.XU CN214838330U (en) 2020-12-31 2020-12-31 Miniaturized planetary gear transmission mechanism based on duplicate gear

Publications (1)

Publication Number Publication Date
CN214838330U true CN214838330U (en) 2021-11-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023319582.XU Active CN214838330U (en) 2020-12-31 2020-12-31 Miniaturized planetary gear transmission mechanism based on duplicate gear

Country Status (1)

Country Link
CN (1) CN214838330U (en)

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