High-efficiency transmission structure with noise reduction function

Abstract

The high-efficiency transmission structure with the noise reduction function comprises a center shaft, a transmission shell A, a transmission shell B and a motor assembly, the center shaft is located in the center of the interior of the transmission shell A and the center of the interior of the transmission shell B, and the motor assembly is fixedly connected to the bottom of the transmission shell B; the center of the top of the transmission shell A is rotationally connected with an output shaft, the bottom end of the output shaft extends to an inner cavity of the transmission shell A, the top end of the center shaft is connected to the bottom end of the output shaft in an inserted mode, the lower side of the outer side wall of the output shaft is connected with a fourth-stage sun gear in a clamped mode, and the bottom of the fourth-stage sun gear is rotationally connected with a fourth-stage planetary gear. According to the high-efficiency transmission structure with the noise reduction function, the centrifugal force caused by gaps is reduced, the transmission efficiency is improved, the noise caused by the gaps is also reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission technology of a transmission, and in particular to a high-efficiency transmission structure with a noise reduction function. Background Art

[0002] Generally, a motor is connected between the transmission to drive the motor to rotate. This motor can be a motor for generating electricity or a drive motor that directly drives the wheels to rotate. One end of the transmission is directly connected to the engine.

[0003] Traditional transmissions do not have a central shaft. When such transmissions rotate, the sun gear is not aligned with the motor's rotation center due to the clearance between the teeth. This results in large centrifugal force, reduced transmission efficiency, increased noise, and reduced service life. To address this, we have proposed a high-efficiency transmission structure with noise reduction function. Summary of the Invention

[0004] The object of the present invention is to provide a high-efficiency transmission structure with a noise reduction function to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency transmission structure with a noise reduction function, comprising a central shaft, a transmission A case, a transmission B case and a motor assembly, wherein the central shaft is located at the inner center of the transmission A case and the transmission B case, the motor assembly is fixedly connected to the bottom of the transmission B case, an output shaft is rotatably connected at the top center of the transmission A case, and the bottom end of the output shaft extends to the inner cavity of the transmission A case, the top end of the central shaft is plugged into the bottom end of the output shaft, a four-stage sun gear is clamped on the lower side of the outer wall of the output shaft, the bottom of the four-stage sun gear is rotatably connected to the four-stage planetary gear, and the four-stage planetary gear The outer wall of the central shaft is located on the lower side of the fourth-stage planetary gear and is sleeved with a three-stage sun gear. The bottom of the three-stage sun gear is rotatably connected to the three-stage planetary gear, and the three-stage planetary gear is evenly distributed in a ring shape. The outer wall of the central shaft is located on the lower side of the three-stage planetary gear and is sleeved with a secondary sun gear. A spring is provided around the outer wall of the secondary sun gear, and the spring is evenly distributed. A cylindrical pin is provided at the end of the spring. The bottom of the secondary sun gear is rotatably connected to the secondary planetary gear. The outer wall of the central shaft is located on the lower side of the secondary planetary gear and is sleeved with a first-stage sun gear. The bottom of the first-stage sun gear is rotatably connected to the first-stage planetary gear.

[0006] Preferably, the transmission A housing and the transmission B housing are fixedly connected by bolts, and a gasket A is provided on the top of the four-stage sun gear.

[0007] Preferably, the inner side of the transmission A case is clamped with the third and fourth stage ring gears, the upper side of the inner cavity of the transmission B case is clamped with the second stage ring gears, and the lower side of the inner cavity of the transmission B case is clamped with the first stage ring gears.

[0008] Preferably, the fourth-stage sun gear and the third-stage sun gear are located in the inner cavity of the third- and fourth-stage ring gears, and the third-stage sun gear rotates in meshing engagement with the fourth-stage planetary gears.

[0009] Preferably, a gasket B is provided between the third-stage sun gear and the second-stage sun gear, and the second-stage sun gear rotates in meshing engagement with the third-stage planetary gear.

[0010] Preferably, the secondary sun gear is located in the inner cavity of the secondary ring gear, the primary sun gear is located in the inner cavity of the primary ring gear, and a gasket C is provided between the secondary sun gear and the secondary planetary gear.

[0011] Preferably, the primary sun gear and the secondary planetary gears mesh and rotate, and the primary planetary gears and the inner cavity wall of the primary ring gear mesh and rotate.

[0012] Preferably, a motor output tooth is sleeved on the lower side of the outer side wall of the central shaft, and the motor output tooth is fixedly connected to the output end of the motor assembly, and the motor output tooth is engaged and rotated with the first-stage planetary gear.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the high-efficiency transmission structure with noise reduction function, the center shaft is fixed between the output shaft and the motor output teeth, and passes through the center holes of the fourth-stage sun gear, the third-stage sun gear, the second-stage sun gear, and the first-stage sun gear. In this way, during operation, the output shaft, the center shaft, the fourth-stage sun gear, the third-stage sun gear, the second-stage sun gear, the first-stage sun gear, and the motor output teeth are at the same center of a circle, which ensures that the power loss caused by the eccentric operation of the sun gear due to the fitting clearance is avoided during rotation, and ensures that the contact area between the planetary gear and the ring gear is uniform and will not be unevenly stressed due to the clearance problem. At the same time, it also reduces the noise during high-speed operation, thereby reducing the centrifugal force caused by the clearance, improving the transmission efficiency, reducing the noise caused by the clearance, and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the exploded structure of a high-efficiency transmission structure with noise reduction function according to the present invention;

[0015] Figure 2 This is a schematic diagram of the main exploded structure of a high-efficiency transmission structure with noise reduction function according to the present invention;

[0016] Figure 3 This is a schematic diagram of the main cross-sectional structure of a high-efficiency transmission structure with noise reduction function according to the present invention.

[0017] In the figure: 1. Output shaft; 2. Center shaft; 3. Bolt; 4. Transmission case A; 5. Third and fourth stage ring gears; 6. Gasket A; 7. Fourth stage sun gear; 8. Fourth stage planetary gears; 9. Third stage sun gear; 10. Third stage planetary gears; 11. Gasket B; 12. Second stage sun gear; 13. Spring; 14. Cylindrical pin; 15. Gasket C; 16. Second stage planetary gears; 17. Second stage ring gear; 18. First stage sun gear; 19. First stage planetary gears; 20. First stage ring gear; 21. Transmission case B; 22. Motor output gear; 23. Motor assembly. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1:

[0020] See also Figure 1-3The present invention provides a technical solution: a high-efficiency transmission structure with a noise reduction function, comprising a central shaft 2, a transmission A housing 4, a transmission B housing 21 and a motor assembly 23. The central shaft 2 is located at the internal center of the transmission A housing 4 and the transmission B housing 21. The motor assembly 23 is fixedly connected to the bottom of the transmission B housing 21. The output shaft 1 is rotatably connected at the top center of the transmission A housing 4, and the bottom end of the output shaft 1 extends to the inner cavity of the transmission A housing 4. The top end of the central shaft 2 is inserted into the bottom end of the output shaft 1. The lower side of the outer wall of the output shaft 1 is clamped with a four-stage sun gear 7. The bottom of the four-stage sun gear 7 is rotatably connected to the four-stage planetary gear 8, and the four-stage planetary gear 8 is evenly distributed in an annular shape. The outer wall of the central shaft 2 is sleeved on the lower side of the four-stage planetary gear 8. The bottom of the three-stage sun gear 9 is rotatably connected to the three-stage planetary gear 10, and the three-stage planetary gear 10 is evenly distributed in an annular shape. The outer wall of the central shaft 2 is sleeved on the lower side of the three-stage planetary gear 10. 2. A spring 13 is provided around the outer wall of the secondary sun gear 12, and the spring 13 is evenly distributed, and a cylindrical pin 14 is provided at the end of the spring 13. The bottom of the secondary sun gear 12 is connected to the secondary planetary gear 16 in rotation. The outer wall of the central shaft 2 and the lower side of the secondary planetary gear 16 are sleeved with the primary sun gear 18. The bottom of the primary sun gear 18 is connected to the primary planetary gear 19 in rotation. The central shaft 2 is fixed between the output shaft 1 and the motor output gear 22, and passes through the center holes of the fourth-stage sun gear 7, the third-stage sun gear 9, the secondary sun gear 12, and the first-stage sun gear 18. In this way, when running, the output shaft 1, the central shaft 2, the fourth-stage sun gear 7, the third-stage sun gear 9, the secondary sun gear 12, the first-stage sun gear 18, and the motor output gear 22 are at the same center. When rotating, the power loss of the eccentric operation of the sun gear due to the matching clearance is guaranteed, and the contact area between the planetary gear and the ring gear is uniform and will not be unevenly stressed due to the clearance problem, while also reducing the noise during high-speed operation.

[0021] Example 2:

[0022] See also Figure 1-3The present invention provides a technical solution: a high-efficiency transmission structure with a noise reduction function, wherein the transmission A housing 4 and the transmission B housing 21 are fixedly connected by bolts 3, a gasket A6 is provided on the top of the fourth-stage sun gear 7, the inner side of the transmission A housing 4 is clamped with the third and fourth-stage ring gears 5, the upper side of the inner cavity of the transmission B housing 21 is clamped with the second-stage ring gear 17, and the lower side of the inner cavity of the transmission B housing 21 is clamped with the first-stage ring gear 20, the fourth-stage sun gear 7 and the third-stage sun gear 9 are located in the inner cavity of the third and fourth-stage ring gear 5, and the third-stage sun gear 9 meshes and rotates with the fourth-stage planetary gear 8, a gasket B11 is provided between the third-stage sun gear 9 and the second-stage sun gear 12, and the second-stage sun gear 12 meshes and rotates with the third-stage planetary gear 10, the second-stage sun gear 12 is located in the inner cavity of the second-stage ring gear 17, the first-stage sun gear 18 is located in the inner cavity of the first-stage ring gear 20, a gasket C15 is provided between the second-stage sun gear 12 and the second-stage planetary gear 16, the first-stage sun gear 18 meshes and rotates with the second-stage planetary gear 16, and the first-stage planetary gear 19 meshes and rotates with the inner cavity wall of the first-stage ring gear 20. The motor output teeth 22 are sleeved on the lower side of the outer wall of the center shaft 2, and the motor output teeth 22 are fixedly connected to the output end of the motor assembly 23. The motor output teeth 22 mesh with the first-stage planetary gears 19 and rotate. One end of the center shaft 2 is placed on the end where the motor output teeth 22 have a hole feature, and the other end of the center shaft 2 is placed on the end where the output shaft 1 has a hole feature. Because the output shaft 1 and the motor output teeth 22 are fixed, and the center shaft 2 links the two ends, and the centers of the first-stage sun gear 18, the second-stage sun gear 12, the third-stage sun gear 9, and the fourth-stage sun gear 7 are all provided with through-hole features, during assembly, the center shaft 2 will pass through these through-holes to connect the output shaft 1 and the motor output teeth 22. In this way, when the transmission is running, it will ensure that the motor assembly 23, the motor output teeth 22, the first-stage sun gear 7, the second-stage sun gear 9, the third-stage sun gear 12, the fourth-stage sun gear 18, and the output shaft 1 rotate at the same center of a circle, thereby reducing the centrifugal force caused by the gap, improving the transmission efficiency, reducing the noise caused by the gap, and increasing the service life.

[0023] During specific use, when personnel in this technical field use the transmission, the motor output teeth 22 are fixed to the motor assembly 23. When the motor rotates, the motor output teeth 22 also rotate to drive the first-stage planetary gears 19, and the first-stage planetary gears 19 will drive the first-stage sun gear 18 to rotate. When the first-stage sun gear 18 rotates, one end of the tooth profile feature will drive the second-stage planetary gears 16 to rotate. When the second-stage planetary gears 16 rotate, they will drive the second-stage sun gear 12 to rotate. One end of the tooth profile feature of the second-stage sun gear 12 will drive the third-stage planetary gears 10 to rotate. When the third-stage planetary gears 10 rotate, they will drive the third-stage sun gear 9 to rotate. One end of the tooth profile feature of the third-stage sun gear 9 will drive the fourth-stage planetary gears 8 to rotate. When the fourth-stage planetary gears 8 rotate, they will drive the fourth-stage sun gear 7 to rotate. One end of the fourth-stage sun gear 7 is provided with a hexagonal square hole, and one end of the output shaft 1 is also provided with a hexagonal square column. In this way, when the fourth-stage sun gear 7 rotates, it can drive the output shaft 1 to rotate.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although the present invention has been described above with reference to exemplary embodiments, various modifications may be made thereto and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various features of the embodiments disclosed herein may be combined with one another in any manner, provided no structural conflicts exist. The omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A high-efficiency transmission structure with noise reduction function, characterized in that: The invention comprises a central shaft (2), a transmission A housing (4), a transmission B housing (21) and a motor assembly (23), wherein the central shaft (2) is located at the inner center of the transmission A housing (4) and the transmission B housing (21), the motor assembly (23) is fixedly connected to the bottom of the transmission B housing (21), an output shaft (1) is rotatably connected at the top center of the transmission A housing (4), and the bottom end of the output shaft (1) extends to the inner cavity of the transmission A housing (4), the top end of the central shaft (2) is plugged into the bottom end of the output shaft (1), a four-stage sun gear (7) is clamped on the lower side of the outer wall of the output shaft (1), the bottom of the four-stage sun gear (7) is rotatably connected to four-stage planetary gears (8), and the four-stage planetary gears (8) are evenly distributed in a ring shape, the outer wall of the central shaft (2) and the outer wall of the central shaft (2) are located at the bottom of the four-stage sun gear (7). The lower side of the fourth-stage planetary gear (8) is sleeved with a third-stage sun gear (9), and the bottom of the third-stage sun gear (9) is rotatably connected to the third-stage planetary gear (10), and the third-stage planetary gear (10) is evenly distributed in a ring shape. The outer wall of the central shaft (2) and the lower side of the third-stage planetary gear (10) are sleeved with a second-stage sun gear (12), and the outer wall of the second-stage sun gear (12) is provided with a spring (13) around the outer wall, and the spring (13) is evenly distributed, and a cylindrical pin (14) is provided at the end of the spring (13). The bottom of the second-stage sun gear (12) is rotatably connected to the second-stage planetary gear (16), and the outer wall of the central shaft (2) and the lower side of the second-stage planetary gear (16) are sleeved with a first-stage sun gear (18), and the bottom of the first-stage sun gear (18) is rotatably connected to the first-stage planetary gear (19).

2. A high-efficiency transmission structure with noise reduction function according to claim 1, characterized in that: The transmission A housing (4) and the transmission B housing (21) are fixedly connected via bolts (3), and a gasket A (6) is provided on the top of the four-stage sun gear (7).

3. The high-efficiency transmission structure with noise reduction function according to claim 1, characterized in that: The inner side of the transmission A case (4) is clamped with a third and fourth stage gear ring (5), the upper side of the inner cavity of the transmission B case (21) is clamped with a second stage gear ring (17), and the lower side of the inner cavity of the transmission B case (21) is clamped with a first stage gear ring (20).

4. The high-efficiency transmission structure with noise reduction function according to claim 3, characterized in that: The fourth-stage sun gear (7) and the third-stage sun gear (9) are located in the inner cavity of the third- and fourth-stage gear rings (5), and the third-stage sun gear (9) rotates in meshing engagement with the fourth-stage planetary gears (8).

5. The high-efficiency transmission structure with noise reduction function according to claim 1, characterized in that: A gasket B (11) is provided between the third-stage sun gear (9) and the second-stage sun gear (12), and the second-stage sun gear (12) meshes and rotates with the third-stage planetary gear (10).

6. The high-efficiency transmission structure with noise reduction function according to claim 4, characterized in that: The secondary sun gear (12) is located in the inner cavity of the secondary gear ring (17), the primary sun gear (18) is located in the inner cavity of the primary gear ring (20), and a gasket C (15) is provided between the secondary sun gear (12) and the secondary planetary gear (16).

7. A high-efficiency transmission structure with noise reduction function according to claim 6, characterized in that: The primary sun gear (18) and the secondary planetary gear (16) mesh and rotate, and the primary planetary gear (19) and the inner cavity wall of the primary gear ring (20) mesh and rotate.

8. The high-efficiency transmission structure with noise reduction function according to claim 1, characterized in that: A motor output tooth (22) is sleeved on the lower side of the outer wall of the central shaft (2), and the motor output tooth (22) is fixedly connected to the output end of the motor assembly (23), and the motor output tooth (22) is meshed and rotated with the first-stage planetary gear (19).

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