Transmission module

Abstract

This invention relates to the field of transmission module technology, and provides a transmission module comprising: a first motor; a second motor; a first gearbox assembly; a second gearbox assembly; a first gear transmission assembly, the first gear transmission assembly being driveably connected to the first gearbox assembly; and a second gear transmission assembly, the second gear transmission assembly being driveably connected to the second gearbox assembly; the second gear transmission assembly and the first gear transmission assembly are coupled to synchronously drive the first motor, the first gearbox assembly, the first gear transmission assembly, the second motor, the second gearbox assembly, and the second gear transmission assembly; the first gearbox assembly includes a first third-stage gearbox and a first second-stage gearbox connected in sequence; the second gearbox assembly includes a second third-stage gearbox and a second second-stage gearbox connected in sequence. Compared with related technologies, the transmission module of this invention can achieve miniaturization, has an aesthetically pleasing overall appearance, and high transmission reliability.

Description

Technical Field

[0001] This invention relates to the field of transmission module technology, and more particularly to a transmission module. Background Technology

[0002] With the advent of the mobile internet era, the number of smart mobile devices is constantly increasing. Among these mobile devices, foldable electronic devices, such as foldable phones, foldable tablets, and laptops, are favored by consumers due to their portability and large displays. Foldable electronic devices achieve their folding function through hinges.

[0003] In related technologies, existing electric folding phones often use a combination of motor and reduction gear to achieve electric opening and closing. The structure is a three-plate, the hinge cover is 13.5mm wide, the motor diameter is relatively large at 4.4mm, the two motors side by side are relatively wide at 12.9mm, and the total length of the motor plus the three-stage gearbox is relatively short at 20.6mm.

[0004] However, existing electrically operated folding phones require high-torque motors to ensure the hinge's opening and closing force within a confined space. These motors have a large diameter, and the width of two motors side-by-side is wide, resulting in a wide hinge cover. Meanwhile, the total length of the motor and three-stage gearbox is relatively short, meaning the internal space of the hinge cover is not fully utilized; only half the space is used to house the motor and gearbox, leaving the other half unused. For users, this structure's large width makes it difficult to achieve a slim and lightweight phone, and the excessively wide hinge cover also affects the phone's overall aesthetics, leading to a poor user experience.

[0005] Therefore, it is necessary to provide a new transmission module to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a miniaturized, aesthetically pleasing, and highly reliable transmission module.

[0007] To achieve the above objectives, embodiments of the present invention provide a transmission module for driving a foldable screen mobile phone, comprising:

[0008] First motor;

[0009] A second motor is disposed opposite to the first motor;

[0010] A first gearbox assembly is coaxially connected to the first motor; a second gearbox assembly is coaxially connected to the second motor.

[0011] A first gear transmission assembly, wherein the first gear transmission assembly is drively connected to the first reduction gearbox assembly; and...

[0012] The second gear transmission assembly is connected to the second gearbox assembly in a transmission manner;

[0013] The second gear transmission assembly is coupled to the first gear transmission assembly to synchronously drive the first motor, the first gearbox assembly, the first gear transmission assembly, the second motor, the second gearbox assembly, and the second gear transmission assembly.

[0014] The first gearbox assembly includes a first third-stage gearbox and a first second-stage gearbox connected in sequence.

[0015] The second gearbox assembly includes a second and third stage gearbox and a second and second stage gearbox that are connected in sequence.

[0016] Preferably, the first gear transmission assembly includes a first output gear and a first synchronous gear meshing with the first output gear, and the first output gear is drivenly connected to the first gearbox assembly; the second gear transmission assembly includes a second output gear and a second synchronous gear meshing with the second output gear, and the second output gear is drivenly connected to the second gearbox assembly.

[0017] The first synchronous gear and the second synchronous gear are sandwiched between the first output gear and the second output gear, and the first output gear and the second output gear achieve synchronous transmission through the meshing of the first synchronous gear and the second synchronous gear.

[0018] Preferably, the transmission module further includes a first bracket fixed to one end of the first gearbox assembly and the second gearbox assembly away from the first motor and the second motor, respectively, and a second bracket spaced apart from one end of the first bracket away from the first gearbox assembly and the second gearbox assembly;

[0019] The first output gear, the first synchronizing gear, the second synchronizing gear, and the second output gear are all disposed between the first bracket and the second bracket and mesh sequentially.

[0020] Preferably, the total length of the first motor, the first gearbox assembly, the first bracket, the first gear transmission assembly, and the second bracket is 20~40mm.

[0021] Preferably, both the first and second third-stage reduction gearboxes are three-stage planetary reducers; both the first and second second-stage reduction gearboxes are two-stage planetary reducers.

[0022] Preferably, the first third-stage gearbox includes a first gear ring fixed to the first motor and a first third-stage gear set disposed within the first gear ring, the first third-stage gear set meshing with the first gear ring; the first second-stage gearbox includes a second gear ring fixed to the end of the first gear ring away from the first motor and a first second-stage gear set disposed within the second gear ring; the first third-stage gear set includes a first transmission gear and three second transmission gears meshing with the outer peripheral side of the first transmission gear, the outer peripheral side of the second transmission gear meshing with the first gear ring; the first second-stage gear set includes a third transmission gear and three fourth transmission gears meshing with the outer peripheral side of the third transmission gear, the outer peripheral side of the fourth transmission gear meshing with the second gear ring; the end of the first transmission gear away from the first second-stage gearbox is connected to the first motor for transmission;

[0023] The transmission module further includes a first connecting assembly, which includes a first turntable, three first connecting rods extending at intervals from the side of the first turntable near the first motor, a second connecting rod extending from the side of the first turntable away from the first motor, a first bearing fixedly sleeved on the second connecting rod, a first fixing block fixedly sleeved on the end of the second connecting rod away from the first turntable, and a first washer sleeved and fixed on the side of the first fixing block away from the first turntable; three second transmission gears are respectively sleeved on the three first connecting rods and form a rotatable connection; the side of the first fixing block away from the first motor is fixedly connected to the third transmission gear;

[0024] The second and third stage gearboxes include a third gear ring fixed to the second motor and a second and third stage gear set disposed within the third gear ring, the second and third stage gear set meshing with the third gear ring; the second and second stage gearboxes include a fourth gear ring fixed to the end of the third gear ring away from the second motor and a second and second stage gear set disposed within the fourth gear ring; the second and third stage gear set includes a fifth transmission gear and three sixth transmission gears meshing with the outer circumference of the fifth transmission gear, the outer circumference of the sixth transmission gear meshing with the third gear ring; the second and second stage gear set includes a seventh transmission gear and three eighth transmission gears meshing with the outer circumference of the seventh transmission gear, the outer circumference of the eighth transmission gear meshing with the fourth gear ring; the end of the fifth transmission gear away from the second and second stage gearboxes is connected to the second motor for transmission;

[0025] The transmission module further includes a second connecting assembly, which includes a second turntable, three third connecting rods extending at intervals from the side of the second turntable near the second motor, a fourth connecting rod extending from the side of the second turntable away from the second motor, a second bearing fixedly sleeved on the fourth connecting rod, a second fixing block fixedly sleeved on the end of the fourth connecting rod away from the second turntable, and a second washer sleeved and fixed on the side of the second fixing block away from the second turntable; the three sixth transmission gears are respectively sleeved on the three fourth connecting rods and form a rotatable connection; the side of the second fixing block away from the second motor is fixedly connected to the seventh transmission gear.

[0026] Preferably, the transmission ratio of the first three-stage gearbox is 60~80; the transmission ratio of the second three-stage gearbox is 60~80, and the transmission ratios of the first three-stage gearbox and the second three-stage gearbox are equal;

[0027] The transmission ratio of the first secondary gearbox is 10~20; the transmission ratio of the second secondary gearbox is 10~20, and the transmission ratios of the first secondary gearbox and the second secondary gearbox are equal.

[0028] Preferably, the first motor and the second motor are cylindrical. The transmission module further includes a first conductive element and a second conductive element. The first conductive element and the second conductive element are respectively fixed to the outer peripheral walls of the first motor and the second motor and sandwiched between the first motor and the second motor. The end of the first conductive element near the first motor is fixed to the first motor and electrically connected to it, and the end of the first conductive element away from the first motor is used to connect to an external power source. The end of the second conductive element near the second motor is fixed to the second motor and electrically connected to it, and the end of the second conductive element away from the second motor is used to connect to the external power source.

[0029] Preferably, the first conductive element includes a first conductive body fixed to the first motor, a first bent portion formed by bending and extending the first conductive body along opposite sides perpendicular to the axis of the first motor toward the first motor, and a first connecting portion formed by bending and extending the first conductive body away from the first gearbox assembly away from the second motor, the first connecting portion being used to connect to the external power source.

[0030] The second conductive element includes a second conductive body fixed to the second motor, a second bent portion formed by bending and extending the second conductive body along opposite sides perpendicular to the axis of the second motor toward the direction of approaching the second motor, and a second connecting portion formed by bending and extending the second conductive body away from the second gearbox assembly away from the first motor. The second connecting portion is used to connect to the external power source.

[0031] Preferably, the first motor includes a first motor body, a first groove formed by the recess of the first motor body from the side near the second motor toward the direction away from the second motor, and a first protrusion formed by the bottom wall of the first groove protruding toward the direction near the second motor; the first protrusion is fixedly connected to the first conductive body.

[0032] The second motor includes a second motor body, a second groove formed by the second motor body recessed from the side away from the first motor toward the direction of approaching the second motor, and a second protrusion formed by the bottom wall of the second groove protruding toward the direction of approaching the first motor; the second protrusion is fixedly connected to the second conductive body.

[0033] Compared with related technologies, the transmission module of the present invention arranges the second motor and the first motor side by side; the first reduction gearbox assembly is coaxially connected to the first motor, the second reduction gearbox assembly is coaxially connected to the second motor, and the second gear transmission assembly is coupled to the first gear transmission assembly to synchronously drive the first motor, the first reduction gearbox assembly, the first gear transmission assembly, the second motor, the second reduction gearbox assembly, and the second gear transmission assembly; the first reduction gearbox assembly includes a first and third stage gearbox and a first and second stage gearbox connected in sequence; the second reduction gearbox assembly includes a second and third stage gearbox and a second and second stage gearbox connected in sequence; this reduces the overall size of the structure, achieving the thinness and lightness of the phone and improving its aesthetics; it also provides a sufficiently large torque required for electric opening and closing within a limited space. The five-stage gearbox occupies less space than a parallel gear set under the same reduction ratio, resulting in a compact system layout; at the same time, the electric opening and closing function of the electric folding screen phone remains unchanged, further reducing the overall structural volume and increasing reliability. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0035] Figure 1 This is a schematic diagram of the structure of the transmission module provided in an embodiment of the present invention;

[0036] Figure 2 This is an exploded view of the transmission module provided in an embodiment of the present invention;

[0037] Figure 3 for Figure 1 AA-line sectional view;

[0038] Figure 4 for Figure 1 BB line section view;

[0039] Figure 5 This is a schematic diagram of the structure of the first motor of the transmission module provided in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the second motor of the transmission module provided in an embodiment of the present invention;

[0041] Figure 7 An exploded view of the gearbox assembly of the transmission module provided in an embodiment of the present invention;

[0042] Figure 8 for Figure 1 CC-line section view;

[0043] Figure 9 for Figure 1 DD-line sectional view;

[0044] Figure 10 This is a schematic diagram of the multi-stage transmission structure of the transmission module provided in an embodiment of the present invention.

[0045] In the diagram, 100 is the transmission module, 1 is the first motor, 101 is the first motor body, 102 is the first groove, 103 is the first protrusion, 2 is the second motor, 201 is the second motor body, 202 is the second groove, 203 is the second protrusion, 3 is the first reduction gearbox assembly, 31 is the first three-stage gearbox, 311 is the first gear ring, 312 is the first three-stage gear set, 3121 is the first transmission gear, 3122 is the second transmission gear, 32 is the first two-stage gearbox, and 3 is the second gearbox. 21. Second gear ring; 322. First and second stage gear sets; 3221. Third transmission gear; 3222. Fourth transmission gear; 4. Second reduction gearbox assembly; 41. Second and third stage gearbox; 411. Third gear ring; 412. Second and third stage gear sets; 4121. Fifth transmission gear; 4122. Sixth transmission gear; 42. Second and second stage gearbox; 421. Fourth gear ring; 422. Second and second stage gear sets; 4221. Seventh transmission gear; 4222. Eighth transmission gear. 5. Gear, 51. First gear transmission assembly, 52. First output gear, 53. First synchronizing gear, 6. Second gear transmission assembly, 64. Second output gear, 65. Second synchronizing gear, 7. First bracket, 8. Second bracket, 9. First conductive element, 91. First conductive body, 92. First bending portion, 93. First connecting portion, 10. Second conductive element, 11. Second conductive body, 12. Second bending portion, 13. Second connecting portion, 14. First connecting assembly, 1 41. First turntable; 142. First connecting rod; 143. Second connecting rod; 144. First bearing; 145. First fixing block; 146. First washer; 15. Second connecting assembly; 151. Second turntable; 152. Third connecting rod; 153. Fourth connecting rod; 154. Second bearing; 155. Second fixing block; 156. Second washer; a. First rotating component; b. Second rotating component; c. Third rotating component; d. Fourth rotating component; e. Fifth rotating component. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1-10 As shown, this embodiment of the invention provides a transmission module 100 for driving a foldable screen mobile phone, which includes: a first motor 1, a second motor 2, a first gearbox assembly 3, a second gearbox assembly 4, a first gear transmission assembly 5, and a second gear transmission assembly 6.

[0048] The second motor 2 is disposed opposite to the first motor 1; it is used to drive the first gearbox assembly 3 and the second gearbox assembly 4 respectively to provide driving force. Optionally, the second motor 2 and the first motor 1 are disposed side by side or parallel.

[0049] The first gearbox assembly 3 is coaxially connected to the first motor 1.

[0050] The second gearbox assembly 4 is coaxially connected to the second motor 2. The second gear transmission assembly 6 is coupled to the first gear transmission assembly 5 to synchronously drive the first motor 1, the first gearbox assembly 3, the first gear transmission assembly 5, the second motor 2, the second gearbox assembly 4, and the second gear transmission assembly 6.

[0051] The first reduction gearbox assembly 3 includes a first and third stage gearbox 31 and a first and second stage gearbox 32 connected in sequence. The second reduction gearbox assembly 4 includes a second and third stage gearbox 41 and a second and second stage gearbox 42 connected in sequence. This design reduces the overall size of the structure, achieving a slimmer and lighter design for the phone and improving its aesthetics. It also provides sufficient torque for electric opening and closing within a limited space. The five-stage gearbox occupies less space than a parallel gear set for the same reduction ratio, resulting in a more compact system layout. Furthermore, while maintaining the electric opening and closing function of the electric folding screen phone, the overall structural volume is further reduced, and reliability is improved, enhancing the user experience. Given the current trend of increasingly technological, intelligent, and high-end user demands, this design has a wider range of applicable scenarios.

[0052] In this embodiment, the first gear transmission assembly 5 includes a first output gear 51 and a first synchronous gear 52 meshing with the first output gear 51; the first output gear 51 is drive-connected to the first reduction gearbox assembly 3. The second gear transmission assembly 6 includes a second output gear 61 and a second synchronous gear 62 meshing with the second output gear 61; the second output gear 61 is drive-connected to the second reduction gearbox assembly 4. The first synchronous gear 52 and the second synchronous gear 62 are sandwiched between the first output gear 51 and the second output gear 61, and the first synchronous gear 52 and the second synchronous gear 62 are coupled to form a synchronous transmission. This reduces the overall size of the structure, achieving a thinner and lighter design for the phone and improving its aesthetics; it also provides sufficient torque for electric opening and closing within a limited space. The five-stage gearbox occupies less space than a parallel gear set under the same reduction ratio, resulting in a more compact system layout; at the same time, while maintaining the electric opening and closing function of the electric folding screen phone, the overall structural volume is further reduced, and the reliability is higher, improving the user experience. Given the current increasingly technological, intelligent, and high-end user demands, this design has a wider range of applicable scenarios.

[0053] In this embodiment, the diameters of the first motor 1 and the second motor 2 are both 3-5 mm; the width of the first motor 1 and the second motor 2 when placed side by side is 8-15 mm; the distance between the center positions of the first motor 1 and the second motor 2 is 4-10 mm; the total length of the first motor 1 and the first three-stage gearbox 31 is 20-30 mm; the total length of the second motor 2 and the second three-stage gearbox 41 is 20-30 mm. This design fully utilizes the internal space of the hinge cover, reducing its width.

[0054] Specifically, the diameters of the first motor 1 and the second motor 2 are both 3.96 mm; the width of the first motor 1 and the second motor 2 when placed side by side is 10.638 mm; the distance between the center positions of the first motor 1 and the second motor 2 is 6.678 mm; the total length of the first motor 1 and the first three-stage gearbox 31 is 24.75 mm; the total length of the second motor 2 and the second three-stage gearbox 41 is 24.75 mm. This design fully utilizes the internal space of the hinge cover, reducing its width.

[0055] In this embodiment, the transmission module 100 further includes a first bracket 7 fixed to the first reduction gearbox assembly 3 and the second reduction gearbox assembly 4 respectively away from the first motor 1 and the second motor 2, and a second bracket 8 spaced apart at one end of the first bracket 7 away from the first reduction gearbox assembly 3 and the second reduction gearbox assembly 4. The first output gear 51, the first synchronous gear 52, the second synchronous gear 62, and the second output gear 61 are all disposed between the first bracket 7 and the second bracket 8 and mesh sequentially. By implementing a dual-motor coupled output design with the first motor 1 and the second motor 2, the decomposition of the opening and closing force ensures the smoothness of the opening and closing process; relying on the first bracket 7 and the second bracket 8 to fix and position the first synchronous gear 52 and the second synchronous gear 62, the coupling of the first output gear 51 and the second output gear 61 ensures the consistency of the opening and closing speed and duration of the two swing arms, achieving the effect of synchronous opening and closing of the two swing arms and optimizing the user experience.

[0056] In this embodiment, the total length of the first motor 1, the first gearbox assembly 3, the first bracket 7, the first gear transmission assembly 5, and the second bracket 8 is 20~40mm. Optionally, the total length of the first motor 1, the first gearbox assembly 3, the first bracket 7, the first gear transmission assembly 5, and the second bracket 8 is 29.84mm.

[0057] Specifically, the first motor 1 and the second motor 2, both micro stepper motors with a diameter of 3.96mm, are equipped with a three-stage reduction gearbox followed by a two-stage reduction gearbox to increase the transmission ratio of the system and meet the torque requirements of the foldable phone. The opening and closing of the left and right mid-frames of the phone are synchronized through coupling via the first synchronous gear 52 and the second synchronous gear 62. This achieves a sufficiently large torque to enable synchronous electric opening and closing of the hinges on both sides, while maintaining an overall size of only 29.84mm (length) × 10.638mm (width) × 3.96mm (height), thus satisfying the user experience requirements of intelligent and technological features.

[0058] In this embodiment, both the first and second third-stage reduction gearboxes are three-stage planetary reducers; both the first and second second-stage reduction gearboxes are two-stage planetary reducers. This achieves a high transmission ratio torque output structure with dual-motor drive and three-stage and two-stage planetary reducers in a confined space. Simultaneously, this transmission module 100 rationally allocates the relatively small radial width, axial length, and longitudinal height space, resulting in a compact system structure, high space utilization, high component integration and reliability, and output torque that provides sufficient opening and closing force for the hinge system.

[0059] This implementation method, such as Figure 7 As shown, the first third-stage gearbox 31 includes a first gear ring 311 fixed to the first motor 1 and a first third-stage gear set 312 disposed within the first gear ring 311, the first third-stage gear set 312 meshing with the first gear ring 311; the first second-stage gearbox 32 includes a second gear ring 321 fixed to one end of the first gear ring 311 away from the first motor 1 and a first second-stage gear set 322 disposed within the second gear ring 321. The first third-stage gear set 312 includes a first transmission gear 3121 and three second transmission gears 3122 that mesh with the outer peripheral side of the first transmission gear 3121. The outer peripheral side of the second transmission gears 3122 meshes with the first gear ring 311. The first second-stage gear set 322 includes a third transmission gear 3221 and three fourth transmission gears 3222 that mesh with the outer peripheral side of the third transmission gear 3221. The outer peripheral side of the fourth transmission gears 3222 meshes with the second gear ring 321. The end of the first transmission gear 3121 away from the first second-stage gearbox 32 is connected to the first motor 1 for transmission.

[0060] The transmission module 100 further includes a first connecting assembly 14, which includes a first turntable 141, three first connecting rods 142 extending at intervals from the side of the first turntable 141 near the first motor 1, a second connecting rod 143 extending from the side of the first turntable 141 away from the first motor 1, a first bearing 144 fixedly sleeved on the second connecting rod 143, a first fixing block 145 fixedly sleeved on the end of the second connecting rod 143 away from the first turntable 141, and a first washer 146 sleeved and fixed on the side of the first fixing block 145 away from the first turntable 141; three second transmission gears 3122 are respectively sleeved on the three first connecting rods 142 and form a rotatable connection; the side of the first fixing block 145 away from the first motor 1 is fixedly connected to the third transmission gear 3221.

[0061] like Figure 10 As shown, optionally, the first three-stage gear set 312 includes three gears interconnected by three turntables, arranged axially along the output shaft of the first motor 1. The three turntables are defined as a first rotating element a, a second rotating element b, and a third rotating element c, where the first rotating element a is the first turntable 141, and the second and third rotating elements b and c are similar to the first rotating element a, except that they lack the second connecting rod 143; otherwise, their structures are the same. The first three-stage gear set 312 is connected to the first two-stage gear set via the first rotating element a, the first three-stage gear set 312 is connected to the second three-stage gear set 312 via the second rotating element b, the second three-stage gear set 312 is connected to the third three-stage gear set 312 via the third rotating element c, and the third three-stage gear set 312 is connected to the first motor 1. The first motor 1 drives the third three-stage gear set 312, thereby sequentially driving the third rotating element c, the second rotating element b, and the first rotating element a to achieve a three-stage transmission process.

[0062] Optionally, the first and second stage gear sets 322 include two sets connected to each other via two turntables. The two first and second stage gear sets 322 are arranged axially along the output shaft of the first motor 1. The two turntables are defined as the fourth rotating element d and the fifth rotating element e, respectively; wherein the fourth rotating element d and the fifth rotating element e have the same structure as the second rotating element b. The first and second stage gear sets 322 are connected to the second stage gear set 322 via the fourth rotating element d, and the second stage gear set 322 is connected to the first gear transmission assembly 5 via the fifth rotating element e. The first turntable 141 drives the first fixed block 145 to rotate, thereby driving the first stage gear set 322 to drive the fourth rotating element d, the second stage gear set 322, and the fifth rotating element e to achieve a two-stage transmission process. The end of the fifth rotating element e away from the first motor 1 is connected to the first gear transmission assembly 5.

[0063] The second-third stage gearbox 41 includes a third gear ring 411 fixed to the second motor 2 and a second-third stage gear set 412 disposed within the third gear ring 411, the second-third stage gear set 412 meshing with the third gear ring 411; the second-second stage gearbox 42 includes a fourth gear ring 421 fixed to one end of the third gear ring 411 away from the second motor 2 and a second-second stage gear set 422 disposed within the fourth gear ring 421. The second-third stage gear set 412 includes a fifth transmission gear 4121 and three sixth transmission gears 4122 meshing with the outer peripheral side of the fifth transmission gear 4121, the outer peripheral side of the sixth transmission gears 4122 meshing with the third gear ring 411; the second-second stage gear set 422 includes a seventh transmission gear 4221 and three eighth transmission gears 4222 meshing with the outer peripheral side of the seventh transmission gear 4221, the outer peripheral side of the eighth transmission gears 4222 meshing with the fourth gear ring 421. The end of the fifth transmission gear 4121 that is away from the second secondary gearbox 42 is connected to the second motor 2 for transmission.

[0064] The transmission module 100 further includes a second connecting assembly 15, which includes a second turntable 151, three third connecting rods 152 extending at intervals from the side of the second turntable 151 near the second motor 2, a fourth connecting rod 153 extending from the side of the second turntable 151 away from the second motor 2, a second bearing 154 fixedly sleeved on the fourth connecting rod 153, a second fixing block 155 fixedly sleeved on the end of the fourth connecting rod 153 away from the second turntable 151, and a second washer 156 sleeved and fixed on the side of the second fixing block 155 away from the second turntable 151. The three sixth transmission gears 4122 are respectively sleeved on the three fourth connecting rods 153 and form a rotatable connection. The side of the second fixing block 155 away from the second motor 2 is fixedly connected to the seventh transmission gear 4221. The second and third stage gear sets 412 are arranged opposite to the first and third stage gear sets 312 along the Z-axis. The second and third stage gear sets 412 also consist of three sets, and their transmission method is the same as that of the first and third stage gear sets 312. The second and second stage gear sets 422 are arranged opposite to the first and second stage gear sets 322 along the Z-axis. There are also two sets of the second and second stage gear sets 422, and the transmission method is the same as that of the first and second stage gear sets 322. The structure is the same, the working principle is the same, and the effect is the same, so it will not be described further here.

[0065] In this embodiment, the transmission ratio of the first three-stage gearbox 31 is 60~80; the transmission ratio of the second three-stage gearbox 41 is 60~80; and the transmission ratios of the first three-stage gearbox 31 and the second three-stage gearbox 41 are equal.

[0066] The first secondary gearbox 32 has a transmission ratio of 10 to 20; the second secondary gearbox 42 has a transmission ratio of 10 to 20. The transmission ratios of the first secondary gearbox 32 and the second secondary gearbox 42 are equal.

[0067] Specifically, the transmission ratio of the first three-stage gearbox 31 is 78.7; the transmission ratio of the second three-stage gearbox 41 is 78.7.

[0068] The first secondary gearbox 32 has a transmission ratio of 16; the second secondary gearbox 42 has a transmission ratio of 16. By arranging the first motor 1 and the second motor 2 side by side, and combining the tertiary gearbox with a transmission ratio of 78.7 and the secondary gearbox with a transmission ratio of 16, the first motor 1 and the second motor 2 are coupled through synchronous gears, enabling the left and right mid-frames of the mobile phone terminal to open and close synchronously. Simultaneously, compared to parallel gear sets, this method occupies less space for the same transmission ratio, and because the gearbox is sealed, metal debris that may be generated by gear friction will not fall onto the body, causing electronic contamination or short circuits, and it will not be contaminated by dust or oil.

[0069] In this embodiment, the first motor 1 and the second motor 2 are cylindrical. The transmission module 100 further includes a first conductive element 9 and a second conductive element 10. The first conductive element 9 and the second conductive element 10 are respectively fixed to the outer peripheral walls of the first motor 1 and the second motor 2 and sandwiched between the first motor 1 and the second motor 2. The end of the first conductive element 9 near the first motor 1 is fixed to the first motor 1 and electrically connected, while the end of the first conductive element 9 away from the first motor 1 is used to connect to an external power source. The end of the second conductive element 10 near the second motor 2 is fixed to the second motor 2 and electrically connected, while the end of the second conductive element 10 away from the second motor 2 is used to connect to the external power source. The first conductive element 9 and the second conductive element 10 can supply power to the first motor 1 and the second motor 2 respectively. At the same time, placing the first conductive element 9 and the second conductive element 10 between the first motor 1 and the second motor 2 can accommodate smaller motor sizes and meet the requirements for opening and closing the two-plate assembly.

[0070] In this embodiment, the first conductive element 9 includes a first conductive body 91 fixed to the first motor 1, a first bent portion 92 formed by bending and extending the first conductive body 91 along opposite sides perpendicular to the axial direction of the first motor 1 towards the first motor 1, and a first connecting portion 93 formed by bending and extending the first conductive body 91 away from the first gearbox assembly 3 towards the second motor 2. The first connecting portion 93 is used to connect to the external power source. This facilitates the installation of the first conductive body 91 inside the first motor 1, and the first connecting portion 93 facilitates connection to the external power source. The external power source can be an external power supply or a battery, etc.

[0071] The second conductive element 10 includes a second conductive body 11 fixed to the second motor 2, a second bent portion 12 formed by bending and extending the second conductive body 11 along opposite sides perpendicular to the axial direction of the second motor 2 towards the second motor 2, and a second connecting portion 13 formed by bending and extending the second conductive body 11 away from the second gearbox assembly 4 away from the first motor 1. The second connecting portion 13 is used to connect to the external power supply. This facilitates the installation of the second conductive body 11 inside the second motor 2, and the second connecting portion 13 facilitates connection to an external power supply. The axial direction of the first motor 1 is the X-axis, and the direction perpendicular to the axial direction of the first motor 1 is the Y-axis. The direction in which the first motor 1 and the second motor 2 move away from each other (side-by-side direction) is the Z-axis, and the X-axis, Y-axis, and Z-axis are perpendicular to each other.

[0072] In this embodiment, the first motor 1 includes a first motor body 101, a first groove 102 formed by recessing the first motor body 101 from the side near the second motor 2 toward the direction away from the second motor 2, and a first protrusion 103 formed by protruding from the bottom wall of the first groove 102 toward the direction near the second motor 2; the first protrusion 103 is fixedly connected to the first conductive body 91. The first groove 102 corresponds to the first conductive body 91, facilitating the fixed connection between the first conductive element and the first protrusion 103 of the first motor 1.

[0073] The second motor 2 includes a second motor body 201, a second groove 202 formed by the second motor body 201 recessed from the side away from the first motor 1 toward the direction of approaching the second motor 2, and a second protrusion 203 formed by the bottom wall of the second groove 202 protruding toward the direction of approaching the first motor 1; the second protrusion 203 is fixedly connected to the second conductive body 11.

[0074] In this embodiment, the first conductive body 91 is fixed to the first motor 1 by potting adhesive, and the second conductive body 11 is fixed to the second motor 2 by potting adhesive. This provides good fixation and saves installation space.

[0075] Compared with related technologies, the transmission module of the present invention arranges the second motor and the first motor side by side; the first reduction gearbox assembly is coaxially connected to the first motor, the second reduction gearbox assembly is coaxially connected to the second motor, and the second gear transmission assembly is coupled to the first gear transmission assembly to synchronously drive the first motor, the first reduction gearbox assembly, the first gear transmission assembly, the second motor, the second reduction gearbox assembly, and the second gear transmission assembly; the first reduction gearbox assembly includes a first and third stage gearbox and a first and second stage gearbox connected in sequence; the second reduction gearbox assembly includes a second and third stage gearbox and a second and second stage gearbox connected in sequence; this reduces the overall size of the structure, achieving the thinness and lightness of the phone and improving its aesthetics; it also provides a sufficiently large torque required for electric opening and closing within a limited space. The five-stage gearbox occupies less space than a parallel gear set under the same reduction ratio, resulting in a compact system layout; at the same time, the electric opening and closing function of the electric folding screen phone remains unchanged, further reducing the overall structural volume and increasing reliability.

[0076] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A transmission module for driving a foldable screen mobile phone, comprising: First motor; A second motor is disposed opposite to the first motor; A first gearbox assembly is coaxially connected to the first motor; a second gearbox assembly is coaxially connected to the second motor. A first gear transmission assembly, wherein the first gear transmission assembly is drively connected to the first reduction gearbox assembly; and... The second gear transmission assembly is connected to the second reduction gear assembly in a transmission manner; The second gear transmission assembly is coupled to the first gear transmission assembly to synchronously drive the first motor, the first gearbox assembly, the first gear transmission assembly, the second motor, the second gearbox assembly, and the second gear transmission assembly; characterized in that... The first gearbox assembly includes a first third-stage gearbox and a first second-stage gearbox that are connected in sequence. The second gearbox assembly includes a second and a third stage gearbox and a second and a second stage gearbox that are connected in sequence. The first gear transmission assembly includes a first output gear and a first synchronizing gear meshing with the first output gear, and the first output gear is drivenly connected to the first gearbox assembly; the second gear transmission assembly includes a second output gear and a second synchronizing gear meshing with the second output gear, and the second output gear is drivenly connected to the second gearbox assembly. The first synchronous gear and the second synchronous gear are sandwiched between the first output gear and the second output gear, and the first output gear and the second output gear achieve synchronous transmission through the meshing of the first synchronous gear and the second synchronous gear; The first third-stage gearbox includes a first gear ring fixed to the first motor and a first third-stage gear set disposed within the first gear ring, the first third-stage gear set meshing with the first gear ring; the first second-stage gearbox includes a second gear ring fixed to the end of the first gear ring away from the first motor and a first second-stage gear set disposed within the second gear ring; the first third-stage gear set includes a first transmission gear and three second transmission gears meshing with the outer peripheral side of the first transmission gear, the outer peripheral side of the second transmission gear meshing with the first gear ring; the first second-stage gear set includes a third transmission gear and three fourth transmission gears meshing with the outer peripheral side of the third transmission gear, the outer peripheral side of the fourth transmission gear meshing with the second gear ring; the end of the first transmission gear away from the first second-stage gearbox is connected to the first motor for transmission; The transmission module further includes a first connecting assembly, which includes a first turntable, three first connecting rods extending at intervals from the side of the first turntable near the first motor, a second connecting rod extending from the side of the first turntable away from the first motor, a first bearing fixedly sleeved on the second connecting rod, a first fixing block fixedly sleeved on the end of the second connecting rod away from the first turntable, and a first washer sleeved and fixed on the side of the first fixing block away from the first turntable; three second transmission gears are respectively sleeved on the three first connecting rods and form a rotatable connection; the side of the first fixing block away from the first motor is fixedly connected to the third transmission gear.

2. The transmission module according to claim 1, characterized in that, The transmission module further includes a first bracket fixed to one end of the first gearbox assembly and the second gearbox assembly respectively away from the first motor and the second motor, and a second bracket spaced apart from one end of the first bracket away from the first gearbox assembly and the second gearbox assembly; The first output gear, the first synchronizing gear, the second synchronizing gear, and the second output gear are all disposed between the first bracket and the second bracket and mesh sequentially.

3. The transmission module according to claim 2, characterized in that, The total length of the first motor, the first gearbox assembly, the first bracket, the first gear transmission assembly, and the second bracket is 20~40mm.

4. The transmission module according to claim 1, characterized in that, Both the first and second third-stage gearboxes are three-stage planetary reducers; both the first and second second-stage gearboxes are two-stage planetary reducers.

5. The transmission module according to claim 1, characterized in that, The second and third stage gearboxes include a third gear ring fixed to the second motor and a second and third stage gear set disposed within the third gear ring, the second and third stage gear set meshing with the third gear ring; the second and second stage gearboxes include a fourth gear ring fixed to the end of the third gear ring away from the second motor and a second and second stage gear set disposed within the fourth gear ring; the second and third stage gear set includes a fifth transmission gear and three sixth transmission gears meshing with the outer circumference of the fifth transmission gear, the outer circumference of the sixth transmission gear meshing with the third gear ring; the second and second stage gear set includes a seventh transmission gear and three eighth transmission gears meshing with the outer circumference of the seventh transmission gear, the outer circumference of the eighth transmission gear meshing with the fourth gear ring; the end of the fifth transmission gear away from the second and second stage gearboxes is connected to the second motor for transmission; The transmission module further includes a second connecting assembly, which includes a second turntable, three third connecting rods extending at intervals from the side of the second turntable near the second motor, a fourth connecting rod extending from the side of the second turntable away from the second motor, a second bearing fixedly sleeved on the fourth connecting rod, a second fixing block fixedly sleeved on the end of the fourth connecting rod away from the second turntable, and a second washer sleeved and fixed on the side of the second fixing block away from the second turntable; the three sixth transmission gears are respectively sleeved on the three fourth connecting rods and form a rotatable connection; the side of the second fixing block away from the second motor is fixedly connected to the seventh transmission gear.

6. The transmission module according to claim 5, characterized in that, The transmission ratio of the first three-stage gearbox is 60~80, the transmission ratio of the second three-stage gearbox is 60~80, and the transmission ratios of the first three-stage gearbox and the second three-stage gearbox are equal; The transmission ratio of the first secondary gearbox is 10~20, the transmission ratio of the second secondary gearbox is 10~20, and the transmission ratios of the first secondary gearbox and the second secondary gearbox are equal.

7. The transmission module according to claim 1, characterized in that, The first motor and the second motor are cylindrical. The transmission module further includes a first conductive element and a second conductive element. The first conductive element and the second conductive element are respectively fixed to the outer peripheral walls of the first motor and the second motor and sandwiched between the first motor and the second motor. The end of the first conductive element near the first motor is fixed to the first motor and electrically connected to it, and the end of the first conductive element away from the first motor is used to connect to an external power source. The end of the second conductive element near the second motor is fixed to the second motor and electrically connected to it, and the end of the second conductive element away from the second motor is used to connect to the external power source.

8. The transmission module according to claim 7, characterized in that, The first conductive element includes a first conductive body fixed to the first motor, a first bent portion formed by bending and extending the first conductive body along opposite sides perpendicular to the axis of the first motor toward the direction of approaching the first motor, and a first connecting portion formed by bending and extending the first conductive body away from the first gearbox assembly toward the direction of away from the second motor. The first connecting portion is used to connect to the external power source. The second conductive element includes a second conductive body fixed to the second motor, a second bent portion formed by bending and extending the second conductive body along opposite sides perpendicular to the axis of the second motor toward the direction of approaching the second motor, and a second connecting portion formed by bending and extending the second conductive body away from the second gearbox assembly away from the first motor. The second connecting portion is used to connect to the external power source.

9. The transmission module according to claim 8, characterized in that, The first motor includes a first motor body, a first groove formed by the recess of the first motor body from the side near the second motor toward the direction away from the second motor, and a first protrusion formed by the bottom wall of the first groove protruding toward the direction near the second motor; the first protrusion is fixedly connected to the first conductive body. The second motor includes a second motor body, a second groove formed by the second motor body recessed from the side away from the first motor toward the direction of approaching the second motor, and a second protrusion formed by the bottom wall of the second groove protruding toward the direction of approaching the first motor; the second protrusion is fixedly connected to the second conductive body.

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