CN220416129U - Differential mechanism with noise reduction function - Google Patents
Differential mechanism with noise reduction function Download PDFInfo
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- CN220416129U CN220416129U CN202321835542.1U CN202321835542U CN220416129U CN 220416129 U CN220416129 U CN 220416129U CN 202321835542 U CN202321835542 U CN 202321835542U CN 220416129 U CN220416129 U CN 220416129U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 63
- 208000032370 Secondary transmission Diseases 0.000 claims abstract description 39
- 208000032369 Primary transmission Diseases 0.000 claims abstract description 29
- 230000000670 limiting effect Effects 0.000 abstract description 2
- 230000002633 protecting effect Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 230000009194 climbing Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
A differential mechanism with a noise reduction function comprises a motor shaft assembly, a primary transmission assembly, a secondary transmission assembly and a differential packet assembly, wherein the motor shaft assembly comprises a motor shaft, a power output gear I and spline teeth; the first transmission gear is meshed with the first power output gear, the second transmission gear is meshed with the second transmission gear, the first transmission gear is meshed with the first transmission gear, the power input gear of the differential package assembly is meshed and connected with the second power output gear, and the diameter of the first power output gear is smaller than that of the first transmission gear. The spiral angles of the teeth of the first power output gear, the first primary transmission gear and the first secondary transmission gear are 24.5 degrees, so that the differential mechanism can effectively reduce noise when working in a high-speed gear; the boss is additionally arranged at the orifice of the second-stage transmission gear, so that the axial limiting effect can be achieved, the strength of the gear is enhanced, and a certain reinforcing and protecting effect is achieved on the shaft.
Description
Technical Field
The utility model relates to the field of motors, in particular to a differential mechanism with a noise reduction function.
Background
In the running process of the electric vehicle tricycle, the high-speed and low-speed gear shifting is needed to adapt to different running environments, for example, the electric vehicle tricycle runs at a high speed by climbing a slope at a low speed. When downshifting and climbing, if heavy articles are contained in the automobile, the low-speed transmission gear of the differential mechanism can bear larger load, and when the automobile runs at a high speed, larger noise is easily generated in the transmission process of the high-speed transmission gear.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a differential with a noise reduction function.
The technical scheme adopted by the utility model is as follows: a differential mechanism with a noise reduction function comprises a motor shaft assembly, a primary transmission assembly, a secondary transmission assembly and a differential packet assembly which are sequentially connected in a transmission mode according to a power output direction.
The motor shaft assembly comprises a motor shaft and a first power output gear arranged on the motor shaft.
The primary transmission assembly comprises a first shaft and at least two primary transmission gears with different diameters, wherein the primary transmission gears are fixedly connected with the first shaft, the diameter of the second primary transmission gear is smaller than that of the first primary transmission gear, and the first primary transmission gear is meshed with the first power output gear.
The secondary transmission assembly comprises a second shaft, a secondary transmission gear with different diameters, a shifting fork sliding block and a second power output gear, wherein the secondary transmission gear is installed in clearance fit with the second shaft, the shifting fork sliding block is connected with the second shaft through a key, and the second power output gear is fixedly connected with the second shaft, and the diameter of the second secondary transmission gear is larger than that of the first secondary transmission gear; the second transmission gear is meshed with the first transmission gear, and the first transmission gear is meshed with the first transmission gear.
The power input gear of the differential package assembly is meshed and connected with the power output gear II of the secondary transmission assembly.
The diameter of the first power output gear is smaller than that of the first primary transmission gear, the diameter of the first secondary transmission gear is smaller than that of the first secondary transmission gear, and the spiral angles of the teeth of the first power output gear, the first primary transmission gear and the first secondary transmission gear are 24.5 degrees.
Further, a circle of boss protruding out of the end face of the second-stage transmission gear is arranged at the shaft hole of the second-stage transmission gear, and the boss is installed in clearance fit with the second-stage transmission gear.
Further, the low-speed transmission ratio of the differential is 1:15.65.
Further, the high-speed transmission ratio of the differential is 1:5.95.
Further, the modulus and the number of teeth of the first power output gear are as follows: m1.25/15 th teeth.
Further, the modulus and the number of teeth of the first-stage transmission gear are as follows: m1.25/26 teeth, the modulus and the number of teeth of the first-stage transmission gear II are as follows: m1.25/14 teeth.
Further, the modulus and the number of teeth of the first secondary transmission gear are as follows: m1.25/36 teeth, the modulus and the number of teeth of the secondary transmission gear II are as follows: m1.25/51 teeth, the modulus and the number of teeth of the power output gear II are as follows: m1.5/25 teeth.
Further, the modulus and the number of teeth of the power input gear are: m1.5/62 teeth.
The beneficial effects are as follows:
compared with the traditional gear, the tooth helix angle of the gear is set to be 15 degrees, and the tooth helix angles of the power output gear I, the primary transmission gear I and the secondary transmission gear I are set to be 24.5 degrees, so that noise can be effectively reduced when the differential works in a high-speed gear;
a circle of boss is added at the orifice of a second-stage transmission gear serving as a second-stage transmission gear bearing a larger load in a low-grade transmission system of the differential mechanism, so that the axial limiting effect can be achieved, the axial movement between the gear and a shaft is prevented, compared with a traditional clamp spring fixing mode, the strength of the gear is enhanced, and a certain reinforcing and protecting effect is achieved on the shaft.
Drawings
Fig. 1 is a schematic structural diagram of a differential with noise reduction function according to the present utility model.
In the figure, a 1-motor shaft assembly, a 11-motor shaft, a 12-power output gear I, 13-spline teeth,
2-first-stage transmission assembly, 21-first shaft, 22-first-stage transmission gear, 23-first-stage transmission gear,
3-secondary transmission assembly, 31-second shaft, 32-secondary transmission gear I, 33-secondary transmission gear II, 331-boss, 34-power output gear II, 35-shift fork slide block,
4-differential package assembly, 41-power input gear.
Detailed Description
As shown in fig. 1, a differential with noise reduction function comprises a motor shaft assembly 1, a primary transmission assembly 2, a secondary transmission assembly 3 and a differential packet assembly 4 which are sequentially connected in a transmission manner according to the power output direction.
The motor shaft assembly 1 comprises a motor shaft 11, a first power output gear 12 and spline teeth 13, wherein the first power output gear 12 and the spline teeth 13 are arranged on the motor shaft 11. The modulus and the number of teeth of the first power output gear 12 are as follows: m1.25/15 th teeth.
The primary transmission assembly 2 comprises a first shaft 21 and at least two primary transmission gears with different diameters fixedly connected with the first shaft 21, wherein the diameter of a secondary transmission gear 23 is smaller than that of a primary transmission gear 22, and the primary transmission gear 22 is meshed with the power output gear 12. The modulus and the number of teeth of the primary transmission gear one 22 are: m1.25/26 teeth, the modulus and the number of teeth of the first-stage transmission gear II 23 are as follows: m1.25/14 teeth.
The secondary transmission assembly 3 comprises a second shaft 31, a secondary transmission gear with different diameters, a shifting fork sliding block 35 and a second power output gear 34, wherein the secondary transmission gear is installed in clearance fit with the second shaft 31, the shifting fork sliding block 35 is connected with the second shaft 31 in a key manner, and the second power output gear 34 is fixedly connected with the second shaft 31, wherein the diameter of the second transmission gear 33 is larger than that of the first secondary transmission gear 32; the second transmission gear 33 is meshed with the first transmission gear 23, and the first transmission gear 32 is meshed with the first transmission gear 22. The modulus and the number of teeth of the secondary transmission gear one 32 are: m1.25/36 teeth, the modulus and the number of teeth of the secondary transmission gear II 33 are as follows: m1.25/51 teeth, the modulus and the number of teeth of the second power output gear 34 are as follows: m1.5/25 teeth.
The power input gear 41 of the differential package assembly 4 is in meshed connection with the power output gear II 34 of the secondary transmission assembly 3. The modulus and the number of teeth of the power input gear 41 are: m1.5/62 teeth.
The diameter of the first power take-off gear 12 < the diameter of the first primary transfer gear 22 < the diameter of the second secondary transfer gear 32, and the helix angle of the teeth of the first power take-off gear 12, the first primary transfer gear 22 and the second secondary transfer gear 32 is 24.5 degrees.
The shaft hole of the second transmission gear 33 is provided with a circle of boss 331 protruding out of the end face of the second transmission gear, and the boss 331 is installed with the second shaft 31 in a clearance fit mode. After the differential is assembled, the boss 331 abuts against the end face of the bearing to limit the axial movement between the gear and the shaft.
The low-speed transmission ratio of the differential mechanism is 1:15.65; the high speed transmission ratio of the differential is 1:5.95.
Working principle: in the low-speed gear state, the shifting fork sliding block 35 slides to be connected with the second transmission gear 33 under the action of the shifting fork, at this time, the motor shaft 11 drives the first transmission gear 22 to rotate through the first power output gear 12, because the first transmission gear 22 and the second transmission gear 23 are fixedly connected with the first shaft 21, the first shaft 21 rotates, the first transmission gear 32 and the second transmission gear 33 are respectively driven through the first transmission gear 22 and the second transmission gear 23, and because the first transmission gear 32 and the second transmission gear 33 are rotatably connected with the second shaft 31, the second shaft 31 runs at a low speed under the driving of the first transmission gear 23 after the shifting fork sliding block 35 is connected with the second transmission gear 33, and then drives the power input gear 41 of the differential package to rotate through the second power output gear 34, so that the vehicle is driven to run at a low speed, and at this time, the second transmission gear 32 is in the idle state. In contrast, in the high gear state, when the slide fork 35 is connected to the first secondary transmission gear 32, the vehicle is driven to travel at a high speed, and at this time, the second secondary transmission gear 33 is in an idling state.
Claims (9)
1. A differential mechanism with noise reduction function comprises a motor shaft assembly (1), a primary transmission assembly (2), a secondary transmission assembly (3) and a differential packet assembly (4) which are sequentially connected in a transmission way according to the power output direction,
the motor shaft assembly (1) comprises a motor shaft (11), a first power output gear (12) and spline teeth (13), wherein the first power output gear (12) and the spline teeth (13) are arranged on the motor shaft (11);
the primary transmission assembly (2) comprises a first shaft (21) and at least two primary transmission gears with different diameters, wherein the primary transmission gears (23) are fixedly connected with the first shaft (21), the diameter of the primary transmission gears is smaller than that of the primary transmission gears (22), and the primary transmission gears (22) are meshed with the first power output gears (12);
the secondary transmission assembly (3) comprises a second shaft (31), a secondary transmission gear with different diameters, a shifting fork sliding block (35) and a second power output gear (34), wherein the secondary transmission gear is installed with the second shaft (31) in a clearance fit mode, the shifting fork sliding block (35) is connected with the second shaft (31) in a key mode, the second power output gear (34) is fixedly connected with the second shaft (31), and the diameter of the second secondary transmission gear (33) is larger than that of the first secondary transmission gear (32); the second transmission gear II (33) is meshed with the first transmission gear II (23), and the second transmission gear I (32) is meshed with the first transmission gear I (22);
the power input gear (41) of the differential package assembly (4) is meshed with the power output gear II (34) of the secondary transmission assembly (3), and is characterized in that,
the diameter of the power take-off gear I (12) is < the diameter of the primary transmission gear I (22) is < the diameter of the secondary transmission gear I (32), and the helix angle of the teeth of the power take-off gear I (12), the primary transmission gear I (22) and the secondary transmission gear I (32) is 24.5 degrees.
2. The differential with the noise reduction function according to claim 1, wherein a circle of boss (331) protruding out of the end face of the second transmission gear (33) is arranged at the shaft hole of the second transmission gear (33), and the boss (331) is installed in clearance fit with the second transmission gear (31).
3. A differential with noise reduction according to claim 1 or 2, characterized in that the low speed transmission ratio of the differential is 1:15.65.
4. A differential with noise reduction according to claim 1 or 2, characterized in that the high speed transmission ratio of the differential is 1:5.95.
5. A differential with noise reduction according to claim 3, characterized in that the high speed transmission ratio of the differential is 1:5.95.
6. A differential with noise reduction according to claim 1, characterized in that the modulus and number of teeth of the power take-off gear one (12) are: m1.25/15 th teeth.
7. A differential with noise reduction according to claim 1 or 6, characterized in that the modulus and the number of teeth of the primary transmission gear one (22) are: m1.25/26 teeth, the modulus and the number of teeth of the primary transmission gear II (23) are as follows: m1.25/14 teeth.
8. The differential with noise reduction according to claim 7, wherein the modulus and number of teeth of the secondary drive gear one (32) are: m1.25/36 teeth, the modulus and the number of teeth of the secondary transmission gear II (33) are as follows: m1.25/51 teeth, the modulus and the number of teeth of the power output gear II (34) are as follows: m1.5/25 teeth.
9. A differential with noise reduction according to claim 8, characterized in that the modulus and the number of teeth of the power input gear (41) are: m1.5/62 teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321835542.1U CN220416129U (en) | 2023-07-13 | 2023-07-13 | Differential mechanism with noise reduction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321835542.1U CN220416129U (en) | 2023-07-13 | 2023-07-13 | Differential mechanism with noise reduction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220416129U true CN220416129U (en) | 2024-01-30 |
Family
ID=89654955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321835542.1U Active CN220416129U (en) | 2023-07-13 | 2023-07-13 | Differential mechanism with noise reduction function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220416129U (en) |
-
2023
- 2023-07-13 CN CN202321835542.1U patent/CN220416129U/en active Active
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