CN217583071U - Two-stage gear drive speed reducer - Google Patents
Two-stage gear drive speed reducer Download PDFInfo
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- CN217583071U CN217583071U CN202221517439.8U CN202221517439U CN217583071U CN 217583071 U CN217583071 U CN 217583071U CN 202221517439 U CN202221517439 U CN 202221517439U CN 217583071 U CN217583071 U CN 217583071U
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Abstract
Two-stage gear drive reduction gear, including the input gear subassembly with motor output shaft, the output gear subassembly of being connected with the input gear subassembly and the differential mechanism of being connected with the output gear subassembly, its characterized in that: the input gear assembly and the output gear assembly are arranged in the reduction gearbox in parallel, two meshing connections which are separated along the axial direction are formed between the input gear assembly and the output gear assembly, and the positions of the meshing connections are respectively close to the end parts of the input gear assembly and the output gear assembly. The utility model overcomes among the prior art defect that gear one end atress is crooked easily reduces the atress of input gear subassembly and output gear subassembly upper end bearing, improves the rational in infrastructure nature of reduction gear, and increase of service life improves the compact structure nature of reduction gear, and weight reduction reduces the space volume of reduction gear, reduces the requirement of reduction gear to installation space, and the practicality is higher.
Description
Technical Field
The utility model relates to a two-stage gear drive reduction gear, reduction gear technical field.
Background
The existing pure electric or hybrid new energy automobiles are all provided with an electric drive power assembly, the electric drive power assembly comprises a motor and a speed reducer, and an output shaft (or a rotating shaft) of the motor is connected with an input shaft of the speed reducer to transmit torque. With the development of new energy automobiles for many years, the requirements on light weight, large torque and high rotating speed of the speed reducer on the market are higher and higher, in order to meet the market demand, the designed gear has smaller diameter and larger width, so that the bending resistance of the gear is poorer, the component force generated at two ends of the gear is uneven when the speed reducer runs, the bearing at one end is stressed too much, and the design of the speed reducer mechanism is unreasonable.
SUMMERY OF THE UTILITY MODEL
The utility model provides a two-stage gear drive reduction gear overcomes the easy crooked defect of gear one end atress among the prior art, reduces the atress of input gear subassembly and output gear subassembly upper end bearing, improves the rationality of structure of reduction gear, increase of service life improves the compact structure nature of reduction gear, and weight reduction reduces the space volume of reduction gear, reduces the requirement of reduction gear to installation space, and the practicality is higher.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
two-stage gear drive reduction gear, including the input gear subassembly with motor output shaft, the output gear subassembly of being connected with the input gear subassembly and the differential mechanism of being connected with the output gear subassembly, its characterized in that: the input gear assembly and the output gear assembly are arranged in the reduction gearbox in parallel, two meshing connections which are separated along the axial direction are formed between the input gear assembly and the output gear assembly, and the positions of the meshing connections are respectively close to the end parts of the input gear assembly and the output gear assembly.
Preferably, the input gear assembly comprises an input shaft connected with the output shaft of the motor, end bearings I arranged at two ends of the input shaft in a press-fitting manner, and first-stage pinions arranged on the input shaft, wherein the number of the first-stage pinions is two, and the first-stage pinions are respectively abutted to one end face of each end bearing.
Preferably, the input shaft is a hollow shaft, and the first-stage pinion is an outer gear ring integrally formed on the outer wall of the input shaft.
Preferably, the output gear assembly comprises an output shaft parallel to the input shaft, second end bearings press-fitted at two ends of the output shaft, and a first-stage large gear coaxially mounted on the output shaft and correspondingly engaged with the first-stage small gear, and the first-stage large gear is respectively abutted against two end faces of the end bearings.
Preferably, the output shaft is provided with a second-stage pinion, the second-stage pinion is coaxially arranged between the two first-stage bull gears, the second-stage pinion is meshed with the second-stage bull gear, and the second-stage bull gear is fixed with the shell of the differential.
Preferably, the output shaft is a hollow shaft, the second-stage pinion is an outer gear ring integrally formed on the outer wall of the output shaft, and the first-stage bull gear is sleeved on the output shaft in a spline fit mode and is clamped between the second-stage pinion and the end bearing II.
Preferably, the first-stage gearwheel is provided with a weight reduction ring groove.
The beneficial effects of the utility model are that:
1. the utility model discloses a two-stage gear drive reduction gear, the input gear subassembly passes through motor drive, with power transmission to output gear subassembly, the output gear subassembly drives differential mechanism motion, differential mechanism is with the power take off after slowing down, input gear subassembly and output gear subassembly form two-stage gear drive, form between the two and connect along the two meshing that the axial separates, and the tip that is close to input gear subassembly and output gear subassembly respectively in the position that the meshing is connected, the tip that makes input gear subassembly and output gear subassembly all evenly atress, overcome the easy crooked defect of gear one end atress among the prior art, reduce the atress of input gear subassembly and output gear subassembly upper end bearing, the structural rationality of reduction gear is improved, and the service life is prolonged.
2. The input shaft is a hollow shaft, the first-stage pinion and the input shaft are integrally formed, the output shaft is a hollow shaft, the second-stage pinion and the output shaft are integrally formed, the first-stage gear wheel is provided with the weight reduction ring groove, the structure compactness of the speed reducer is improved, the weight is reduced, the space volume of the speed reducer is reduced, the requirement of the speed reducer on the installation space is reduced, and the practicability is higher.
Drawings
FIG. 1 is a schematic illustration of a two-stage gear reduction unit in an embodiment.
Detailed Description
The following describes an embodiment of the present invention in detail with reference to fig. 1.
Two-stage gear drive reduction gear, including input gear assembly 1 with motor output shaft, output gear assembly 2 with input gear assembly 1 is connected and the differential mechanism 3 with output gear assembly 2 is connected, its characterized in that: the input gear assembly 1 and the output gear assembly 2 are installed in the reduction gearbox in parallel, two meshing connections which are axially separated are formed between the input gear assembly 1 and the output gear assembly 2, and the meshing connections are respectively close to the ends of the input gear assembly 1 and the output gear assembly 2.
The two-stage gear drive reduction gear, input gear subassembly 1 passes through motor drive, with power transmission to output gear subassembly 1, output gear subassembly 1 drives differential mechanism 3 motion, differential mechanism 3 is the power take off after will slowing down, input gear subassembly 1 and output gear subassembly 2 form two-stage gear drive, form between the two along two meshing connections that the axial separates, and be close to the tip of input gear subassembly 1 and output gear subassembly 2 respectively at the position that the meshing is connected, make the equal atress in tip of input gear subassembly 1 and output gear subassembly 2, overcome the easy crooked defect of gear one end atress among the prior art, reduce the atress of input gear subassembly 1 and the 2 upper end bearings of output gear subassembly, the structure rationality of reduction gear is improved, and service life is prolonged.
The input gear assembly 1 comprises an input shaft 11 connected with the output shaft of the motor, end bearings I12 arranged at two ends of the input shaft 11 in a press-fitting manner, and first-stage pinions 13 arranged on the input shaft 11, wherein the number of the first-stage pinions 13 is two, and the first-stage pinions are respectively abutted to the end faces of the end bearings I12. As shown in the figure, one first-stage gear 13 abuts against the first end bearing 12 at one end of the input shaft, the other first-stage gear 13 abuts against the first end bearing 12 at the other end of the input shaft, and the two first-stage pinion wheels 13 are respectively close to the end part of the input shaft 11, so that the input gear assembly 1 and the output gear assembly 2 are in meshing connection at two positions which are separated along the axial direction.
Wherein, input shaft 11 be the hollow shaft, alleviate the weight of reduction gear, first order pinion 13 is the outer ring gear of integrated into one piece on 11 outer walls of input shaft, reduce input gear assembly 1's space volume, because have two first order pinions 13 and two first order pinions 13 are close to the tip of input shaft 11 respectively on the input shaft 11, form two meshing connections between input shaft 11 and the output shaft gear assembly 2, compare in one meshing connection among the prior art, input shaft 11 is radially supported by two first order pinions 13, 11 axial atress of input shaft is more even, hollow structure's input shaft 11 also is difficult for producing the bending, the atress of end bearing 12 at input shaft 11 both ends is little and even, input shaft gear assembly 1's transmission structure reliability is higher, the transmission is smooth and easy better.
The output gear assembly 2 comprises an output shaft 21 parallel to the input shaft 11, end bearings two 22 press-fitted at two ends of the output shaft 21, and a first-stage large gear 23 coaxially mounted on the output shaft 21 and correspondingly engaged with the first-stage small gear 13, wherein the first-stage large gear 23 is respectively abutted against end faces of the end bearings two 22. The power is transmitted by the meshing of the first-stage small gear 13 and the first-stage large gear 23, the meshing connection position of the first-stage small gear 13 and the first-stage large gear 23 is close to the end parts of the input shaft 11 and the output shaft 21, so that the input shaft 11 and the output shaft 21 are uniformly stressed and are not easy to bend, the stress of the end part bearing II 22 and the stress of the end part bearing I12 are small and uniform, the structural reliability of two-stage gear transmission is high, and the service life is longer.
The output shaft 21 is provided with a second-stage pinion 24, the second-stage pinion 24 is coaxially arranged between the two first-stage bull gears 23, the second-stage pinion 24 is meshed with a second-stage bull gear 25, and the second-stage bull gear 25 is fixed with the shell of the differential mechanism 3. The motor drives the input shaft 11 to rotate, the first-stage pinion 13 drives the first-stage gearwheel 23 to synchronously rotate, so that the output shaft 21 rotates, the second-stage pinion 24 drives the second-stage gearwheel 25 to rotate along with the rotation of the output shaft 21, the second-stage gearwheel 25 drives the differential mechanism 3 to move, and the power after speed reduction is output through the differential mechanism 3.
The output shaft 21 is a hollow shaft, the weight of the speed reducer is reduced, the stress of the output shaft 21 is uniform, the output shaft 21 with a hollow structure is not easy to bend and deform, the second-stage pinion 24 is an outer gear ring integrally formed on the outer wall of the output shaft 21, the space volume of the output gear assembly 2 is reduced, and the first-stage gearwheel 23 is sleeved on the output shaft 32 in a spline fit mode and is clamped between the second-stage pinion 24 and the end bearing II 22. The first-stage large gear 23 is clamped between the end face of the second-stage small gear 24 and the end face of the end bearing 22 and is axially positioned, the first-stage large gear 23 is high in installation stability on the output shaft 21, cannot move relative to the output shaft 21, is high in structural reliability and is easy to assemble.
Wherein, the first-stage gearwheel 23 is provided with a weight-reducing ring groove 231, so as to further reduce the weight of the speed reducer. The input shaft 11 is a hollow shaft, the first-stage pinion 13 and the input shaft 11 are integrally formed, the output shaft 21 is a hollow shaft, the second-stage pinion 24 and the output shaft 21 are integrally formed, the weight-reducing ring groove 231 is formed in the first-stage gear 23, the structural compactness of the speed reducer is improved, the weight is reduced, the space volume of the speed reducer is reduced, the requirement of the speed reducer on the installation space is reduced, and the practicability is higher.
In the above, the technical solutions of the embodiments of the present invention are completely described with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Claims (7)
1. Two-stage gear drive reduction gear, including the input gear subassembly with motor output shaft, the output gear subassembly of being connected with the input gear subassembly and the differential mechanism of being connected with the output gear subassembly, its characterized in that: the input gear assembly and the output gear assembly are arranged in the reduction gearbox in parallel, two meshing connections which are separated along the axial direction are formed between the input gear assembly and the output gear assembly, and the positions of the meshing connections are respectively close to the end parts of the input gear assembly and the output gear assembly.
2. A two-stage gear reduction unit according to claim 1, wherein: the input gear assembly comprises an input shaft connected with the output shaft of the motor, end bearings I pressed at two ends of the input shaft and first-stage pinions arranged on the input shaft, wherein the number of the first-stage pinions is two, and the first-stage pinions are respectively abutted against one end face of the end bearing.
3. A two-stage gear reduction unit according to claim 2, characterised in that: the input shaft is a hollow shaft, and the first-stage pinion is an outer gear ring integrally formed on the outer wall of the input shaft.
4. A two-stage gear reduction unit according to claim 2, characterised in that: the output gear assembly comprises an output shaft parallel to the input shaft, end bearings II pressed at two ends of the output shaft and a first-stage large gear which is coaxially arranged on the output shaft and correspondingly meshed with the first-stage small gear, and the first-stage large gear is respectively abutted against two end faces of the end bearings.
5. The two-stage gear reduction unit of claim 4, wherein: the output shaft is provided with a second-stage pinion, the second-stage pinion is coaxially arranged between the two first-stage bull gears, the second-stage pinion is meshed with the second-stage bull gear, and the second-stage bull gear is fixed with a shell of the differential mechanism.
6. The two-stage gear reduction unit of claim 5, wherein: the output shaft is a hollow shaft, the second-stage pinion is an outer gear ring which is integrally formed on the outer wall of the output shaft, and the first-stage bull gear is sleeved on the output shaft in a spline fit mode and is clamped between the second-stage pinion and the end bearing II.
7. The two-stage gear reduction unit of claim 4, wherein: and a weight reduction ring groove is formed in the first-stage gearwheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221517439.8U CN217583071U (en) | 2022-06-17 | 2022-06-17 | Two-stage gear drive speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221517439.8U CN217583071U (en) | 2022-06-17 | 2022-06-17 | Two-stage gear drive speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217583071U true CN217583071U (en) | 2022-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221517439.8U Active CN217583071U (en) | 2022-06-17 | 2022-06-17 | Two-stage gear drive speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217583071U (en) |
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2022
- 2022-06-17 CN CN202221517439.8U patent/CN217583071U/en active Active
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