Gear box of electric side door of automobile

Abstract

The utility model provides an automobile electric side door gearbox which comprises a bottom shell, the bottom shell is fixedly covered with a top shell, a first gear, an intermediate gear and a second gear are movably installed on the bottom shell, the first gear is connected with the intermediate gear in a meshed mode, the intermediate gear is connected with the second gear in a meshed mode, the first gear and the second gear are each provided with a middle hole, and inner teeth are arranged in the middle holes. The top shell is provided with a first through hole and a second through hole. During use, the input shaft of the motor is connected to the middle hole of the first gear, the output shaft of the motor is connected to the middle hole of the second gear, the first gear drives the second gear through the middle gear to complete power transmission, the power transmission direction of the output shaft is changed through the gearbox, and even if the power transmission direction of the output shaft is opposite to the power transmission direction of the input shaft, power transmission is completed. And the overall length of the electric driving device is shortened, so that the internal assembly space of the automobile side door is not influenced when the electric driving device is assembled.

Description

Technical Field

[0001] This utility model belongs to the field of gearbox technology, specifically relating to a gearbox for an electric side door of an automobile. Background Technology

[0002] With the development of new energy vehicle technology, in order to improve the user experience, the side doors of automobiles are automatically opened and closed by electric drive. The electric drive device of the existing electric side door drives the side door to open and close. The electric drive device consists of a motor and a gearbox. However, due to the defect in the arrangement of the output shaft and input shaft, the existing electric drive device has a long overall length, which affects the assembly space inside the automobile. Utility Model Content

[0003] The purpose of this utility model is to provide an electric side door gearbox for automobiles to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electric side door gearbox for automobiles, including a bottom shell, on which a top shell is fixedly covered. A first gear, an intermediate gear, and a second gear are movably mounted on the bottom shell. The first gear is meshed with the intermediate gear, and the intermediate gear is meshed with the second gear. Both the first gear and the second gear are provided with a central hole, and the central hole is provided with internal teeth. The top shell is provided with a first through hole and a second through hole.

[0005] Preferably, the bottom shell is provided with a lower fixing seat, the top shell is provided with an upper fixing seat, and bearings are fixedly installed on both the lower fixing seat and the upper fixing seat.

[0006] Preferably, both the lower fixing seat and the upper fixing seat are provided with reinforcing members.

[0007] Preferably, the first gear and the second gear are both left-handed helical gears, and the intermediate gear is a right-handed helical gear. The first gear, the intermediate gear, and the second gear have the same pitch circle diameter, module, and number of teeth.

[0008] Preferably, the bottom shell is provided with an assembly groove, and the assembly groove is sealed with sealant, which is sealed to the top shell.

[0009] Preferably, the bottom shell is provided with a first fixing ear, the first fixing ear is provided with a insertion hole, the top shell is provided with a insertion rod, and the insertion rod is inserted and fixed to the insertion hole.

[0010] Preferably, the bottom shell is provided with a second fixing lug, and the top shell is provided with a fixing part, wherein the second fixing lug is fixedly connected to the fixing part by bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The bottom shell of this utility model is movably equipped with a first gear, an intermediate gear, and a second gear. The gear set is protected within the shell by a top shell. Both the first and second gears have central holes with internal teeth for connecting the output or input ends. The top shell has a first through hole corresponding to the central hole of the first gear and a second through hole corresponding to the central hole of the second gear. The first and second through holes are located on the same side of the top shell. In use, the motor's input shaft is connected to the central hole of the first gear, and the output shaft is connected to the central hole of the second gear. The first gear drives the second gear through the intermediate gear to complete power transmission. The gearbox changes the power transmission direction of the output shaft, so that the power transmission direction of the output shaft is opposite to that of the input shaft, shortening the overall length of the electric drive device and ensuring that the electric drive device does not affect the internal assembly space of the car's side door during assembly. Attached Figure Description

[0013] Figure 1 This is the first perspective structural view of this utility model.

[0014] Figure 2 This is the second perspective structural view of this utility model.

[0015] Figure 3 This is an exploded structural view of the present invention.

[0016] Figure 4 This is a structural view of the bottom shell of this utility model.

[0017] Figure 5 This is a structural view of the top shell of this utility model.

[0018] Figure 6 This is a structural view of the gear set of this utility model.

[0019] The diagram shows: bottom shell 1, top shell 2, first gear 3, intermediate gear 4, second gear 5, central hole 6, internal gear 7, first through hole 8, second through hole 9, lower fixed seat 10, upper fixed seat 11, bearing 12, reinforcing member 13, assembly groove 14, sealant 15, first fixed ear 16, insertion hole 17, insertion rod 18, second fixed ear 19, fixing part 20, bolt 21. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] like Figures 1-6 As shown, this utility model provides an automotive electric side door gearbox, including a bottom shell 1, which is fixedly covered by a top shell 2. A first gear 3, an intermediate gear 4, and a second gear 5 are movably mounted on the bottom shell 1. The first gear 3 meshes with the intermediate gear 4, and the intermediate gear 4 meshes with the second gear 5. Both the first gear 3 and the second gear 5 have a central hole 6 with internal teeth 7. The top shell 2 has a first through hole 8 and a second through hole 9. The bottom shell 1 has a lower fixed seat 10, and the top shell 2 has an upper fixed seat 11. Bearings 12 are fixedly mounted on both the lower fixed seat 10 and the upper fixed seat 11. Both the lower fixed seat 10 and the upper fixed seat 11 have reinforcing members 13. The first gear 3 and the second gear 5 are both left-handed helical gears, and the intermediate gear 4 is a right-handed helical gear. The first gear 3, the intermediate gear 4, and the second gear 5 have the same pitch circle diameter, module, and number of teeth. The bottom shell 1 has an assembly groove 14, which is sealed with sealant 15, which is sealed to the top shell 2. The bottom shell 1 is provided with a first fixing ear 16, and the first fixing ear 16 is provided with an insertion hole 17. The top shell 2 is provided with an insertion rod 18, which is inserted and fixedly connected to the insertion hole 17. The bottom shell 1 is provided with a second fixing ear 19, and the top shell 2 is provided with a fixing part 20. The second fixing ear 19 is fixedly connected to the fixing part 20 by bolts 21.

[0023] Through the above technical solution, the bottom shell 1 of this utility model is movably equipped with a first gear 3, an intermediate gear 4, and a second gear 5. The top shell 2 protects the gear set within the shell. Both the first gear 3 and the second gear 5 have a central hole 6, with internal teeth 7 for connecting the output or input end. The top shell 2 has a first through hole 8 corresponding to the central hole 6 of the first gear 3, and a second through hole 9 corresponding to the central hole 6 of the second gear 5. The first through hole 8 and the second through hole 9 are located on the same side of the top shell 2. In use, the input shaft of the motor is connected to the central hole 6 of the first gear 3, and the output shaft is connected to the central hole 6 of the second gear 5. The first gear 3 drives the second gear 5 through the intermediate gear 4 to complete power transmission. The power transmission direction of the output shaft is changed through the gearbox, so that the power transmission direction of the output shaft is opposite to the power transmission direction of the input shaft, shortening the overall length of the electric drive device and ensuring that the electric drive device does not affect the internal assembly space of the car side door during assembly.

[0024] Example 2:

[0025] like Figures 1-6As shown, the bottom shell 1 and top shell 2 of this utility model are fixedly closed to form a sealed box structure. A first gear 3, an intermediate gear 4, and a second gear 5 are movably installed inside the bottom shell 1. The first gear 3 meshes with the intermediate gear 4, and the intermediate gear 4 meshes with the second gear 5, forming a gear transmission chain. Both the first gear 3 and the second gear 5 have a central hole 6, and internal teeth 7 are provided within the central hole 6. This design allows the first gear 3 and the second gear 5 to be stably connected to the input shaft and output shaft respectively, realizing power input and output. The top shell 2 has a first through hole 8 and a second through hole 9 corresponding to the central holes 6 of the first gear 3 and the second gear 5, located on the same side of the top shell 2. These two through holes allow the input shaft and output shaft to pass through the top shell 2 and connect to the corresponding gears. The working principle of the entire gearbox is as follows: when the input shaft is connected to the first gear 3 through the first through hole 8 and rotates, power is transmitted to the intermediate gear 4 through the first gear 3, and the intermediate gear 4 then transmits the power to the second gear 5. Due to the presence of the intermediate gear 4, the rotation direction of the second gear 5 is the same as that of the first gear 3. Finally, the second gear 5 transmits power to the output shaft through the second through hole 9. This gearbox design changes the power transmission direction of the output shaft, allowing the input and output shafts to be located on the same side of the top housing 2. This layout significantly shortens the overall length of the electric drive unit and solves the space occupation problem caused by the unidirectional arrangement of the input and output shafts in traditional designs. At the same time, the enclosed structure of the gearbox effectively protects the internal gear set, preventing dust and impurities from entering and extending the gearbox's service life. Furthermore, the design of the bottom housing 1 and top housing 2 facilitates gearbox assembly and maintenance. When maintenance or gear replacement is required, only the top housing 2 needs to be disassembled, greatly improving maintenance efficiency.

[0026] Example 3:

[0027] like Figures 1-6As shown, the bottom shell 1 of this utility model is provided with a lower fixed seat 10, and the top shell 2 is provided with an upper fixed seat 11. Both the lower fixed seat 10 and the upper fixed seat 11 are fixedly mounted with bearings 12. The number and position of the fixed seats in the bottom shell 1 and the top shell 2 are corresponding, with three in each case, corresponding to the first gear 3, the intermediate gear 4, and the second gear 5, respectively. Each fixed seat is equipped with a bearing 12, and the first gear 3, the intermediate gear 4, and the second gear 5 are movably mounted through multiple pairs of upper and lower paired bearings 12. This design significantly improves the gearbox's mobility and stability. Specifically, the lower fixed seat 10 is installed inside the bottom shell 1, and the upper fixed seat 11 is installed inside the top shell 2. When the bottom shell 1 and the top shell 2 are closed, the upper and lower fixed seats 10 form three pairs of support points, corresponding to the axial positions of the three gears. The bearings 12 in each pair of fixed seats provide stable rotational support, enabling the gears to rotate at high speeds under low friction conditions. This design not only improves the gearbox's operating efficiency but also reduces gear wear and extends the gearbox's service life. Furthermore, because each gear has a dedicated mounting base and bearing 12 for support, the alignment accuracy of the entire gear system is guaranteed, reducing meshing errors between gears and improving the smoothness and reliability of the transmission. At the same time, this design also enhances the load-bearing capacity of the gearbox. When the gearbox bears a large load, the load force is distributed to multiple mounting bases through the gears, avoiding the problem of excessive force at a single point and improving the impact resistance and durability of the entire system.

[0028] Example 4:

[0029] like Figures 1-6 As shown, both the lower fixed seat 10 and the upper fixed seat 11 of this utility model are provided with reinforcing members 13. Multiple reinforcing members 13 are arranged in a ring array on the outside of the fixed seat to improve its structural stability. Specifically, the reinforcing member 13 is a protruding structure that surrounds the outer periphery of the fixed seat. These reinforcing members 13 can be rib-shaped, block-shaped, or other suitable shapes to ensure sufficient support in all directions. By adding these ring array of reinforcing members 13 to the outside of the fixed seat, the structural strength of the fixed seat is significantly enhanced. This design allows the fixed seat to better withstand various forces and vibrations from the gear transmission process. When the gears operate at high speed, centrifugal force and vibration are generated, and these forces are transmitted to the fixed seat. The presence of the reinforcing members 13 effectively disperses these forces, preventing deformation or damage to the fixed seat. Simultaneously, the ring array design ensures uniform force distribution, avoiding stress concentration. Furthermore, this reinforcement design also improves the overall rigidity of the gearbox. In the complex environment of automobile operation, the gearbox may be subjected to various external impacts and vibrations. The presence of reinforcement 13 enhances the overall impact resistance of the gearbox, enabling it to better protect the internal gear system.

[0030] Example 5:

[0031] like Figures 1-6 As shown, the first gear 3 and the second gear 5 of this invention are both left-handed gears, while the intermediate gear 4 is a right-handed gear. This gear combination enables smoother meshing and transmission during operation. The cooperation between the left-handed and right-handed gears makes the contact between the gears more continuous, reducing the impact and vibration during gear meshing. Due to the smoother meshing, the noise generated by the gearbox during operation is also reduced accordingly. The first gear 3, the intermediate gear 4, and the second gear 5 have the same pitch circle diameter, module, and number of teeth. This design ensures that the transmission ratio between the gears remains constant and will not change due to differences in gear parameters. In practical applications, this gear combination can effectively extend the service life of the gearbox and improve overall operating efficiency.

[0032] Example 6:

[0033] like Figures 1-6 As shown, the bottom shell 1 of this invention is provided with an assembly groove 14, which surrounds the edge of the bottom shell 1. The cross-section of the assembly groove 14 is rectangular or semi-circular, suitable for accommodating the sealant 15. During assembly, the sealant 15 is installed in the assembly groove 14. The sealant 15 is made of a material with good elasticity and oil resistance, which can maintain a good sealing effect during long-term use. When the top shell 2 is closed with the bottom shell 1, the sealant 15 will fit tightly against the contact surface of the top shell 2, forming a sealing barrier. This sealing structure can effectively prevent external dust, moisture and other contaminants from entering the gearbox, and also prevent the lubricating oil inside the gearbox from leaking. In practical applications, appropriate pressure needs to be applied when installing the top shell 2 and the bottom shell 1 to fully deform the sealant 15 and fill all possible gaps. This sealing structure not only improves the protective performance of the gearbox, but also extends the maintenance cycle of the gearbox and reduces failures caused by poor sealing.

[0034] Example 7:

[0035] like Figures 1-6As shown, the bottom shell 1 of this utility model is provided with a first fixing ear 16, which is located on the outer edge of the bottom shell 1. A circular insertion hole 17 is opened on the first fixing ear 16. The diameter of the insertion hole 17 is slightly larger than the diameter of the corresponding insertion rod 18 on the top shell 2 to facilitate insertion. A corresponding insertion rod 18 matching the insertion hole 17 is provided on the top shell 2. The insertion rod 18 is cylindrical, and its length is slightly less than the depth of the insertion hole 17. The bottom of the insertion rod 18 is fixedly connected to the top shell 2, and the top is slightly inclined to form a guide surface to facilitate insertion into the insertion hole 17. When assembling the gearbox, the operator first places the bottom shell 1 on the workbench, then picks up the top shell 2 and aligns it with the position of the bottom shell 1. The operator aligns the insertion rod 18 on the top shell 2 with the insertion hole 17 on the first fixing ear 16 of the bottom shell 1 and slowly presses it down. The guide surface of the insertion rod 18 guides the insertion rod 18 smoothly into the insertion hole 17. As the top shell 2 descends, the insertion rod 18 is gradually fully inserted into the insertion hole 17. During this process, the engagement of the insertion rod 18 and the socket 17 serves as a guide and provides initial fixation, ensuring precise horizontal alignment of the bottom shell 1 and the top shell 2. Once the insertion rod 18 is fully inserted, the relative positions of the bottom shell 1 and the top shell 2 are fixed, preventing misalignment during subsequent operations. This design of the insertion rod 18 and socket 17 not only simplifies the assembly process but also improves assembly accuracy.

[0036] Example 8:

[0037] like Figures 1-6 As shown, the bottom shell 1 of this utility model is provided with a second fixing lug 19, which is located at the edge of the bottom shell 1. A bolt hole 21 is opened on the second fixing lug 19. The bolt hole 21 is a through hole with a smooth inner wall and no threads. A fixing part 20 is provided at a corresponding position on the top shell 2, which protrudes from the surface of the top shell 2. A threaded hole is also opened on the fixing part 20, and the inner wall of the threaded hole is used to mate with the bolt 21. During the assembly process, after the operator completes the preliminary positioning of the insertion rod 18 and the insertion hole 17, the second fixing lug 19 of the bottom shell 1 and the fixing part 20 of the top shell 2 are aligned. Then, the operator selects a bolt 21 of appropriate size, passes the bolt 21 through the bolt hole 21 of the second fixing lug 19, and screws it into the threaded hole of the fixing part 20. The bolt 21 connection provides stronger fastening force and can withstand various stresses and vibrations generated by the gearbox during operation. This connection method, together with the connection of the insertion rod 18 and the insertion hole 17, ensures a stable connection between the bottom shell 1 and the top shell 2. Furthermore, the bolt 21 connection facilitates future maintenance and disassembly. When the gearbox needs to be opened for maintenance, simply loosening bolt 21 easily separates the bottom shell 1 and the top shell 2 without damaging the parts. When bolt 21 is tightened, it applies pressure to the sealing ring between the bottom shell 1 and the top shell 2, ensuring that the lubricating oil inside the gearbox does not leak, while preventing external dust and moisture from entering the gearbox.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An automotive electrically powered side door gear box comprising a bottom shell to which a top shell is fixedly attached, characterised in that, The bottom shell movably mounts a first gear, an intermediate gear and a second gear, the first gear is in meshing connection with the intermediate gear, the intermediate gear is in meshing connection with the second gear, the first gear and the second gear are both provided with a middle hole, the middle hole is provided with an inner tooth, the top shell is provided with a first through hole and a second through hole.

2. An electrically powered side door gear box for a vehicle as claimed in claim 1, wherein, The bottom shell is provided with a lower fixing seat, the top shell is provided with an upper fixing seat, the lower fixing seat and the upper fixing seat are both fixedly mounted with a bearing.

3. An electrically powered side door gear box for a vehicle as defined in claim 2, wherein, The lower fixing seat and the upper fixing seat are both provided with a reinforcing piece.

4. The electrically powered side door gear box of claim 1, wherein, The first gear and the second gear are both left-hand gears, the intermediate gear is a right-hand gear, the first gear, the intermediate gear and the second gear have the same pitch diameter, modulus and tooth number.

5. The electrically powered side door gear box of claim 1, wherein, The bottom shell is provided with an assembly groove, the assembly groove is sealingly mounted with sealing glue, the sealing glue is sealingly connected with the top shell.

6. An electrically powered side door gear box for a vehicle as defined in claim 1, wherein, The bottom shell is provided with a first fixing lug, the first fixing lug is provided with a jack hole, the top shell is provided with a jack rod, the jack rod is insertedly fixed with the jack hole.

7. The electrically powered side door gear box of claim 1, wherein, The bottom shell is provided with a second fixing lug, the top shell is provided with a fixing portion, the second fixing lug is fixedly connected with the fixing portion through bolts.

Images