Dual-shaft synchronous transmission device
A dual-shaft synchronous transmission device is applied to an electronic apparatus. The distance between the two shafts of the dual-shaft synchronous transmission device is shortened so that the electronic device can be thinned and lightweight. The dual-shaft synchronous transmission device includes a driver and a reactor respectively disposed on a first shaft and a second shaft and a link unit. Spur gear structures or crown gear structures are respectively disposed on the driver and the reactor. Crown gear structures or spur gear structures are respectively disposed at two ends of the link unit correspondingly engaged with the spur gear structures or crown gear structures of the driver and the reactor. When the first shaft and the driver are rotated, the driver rotates the link unit to drive the reactor and the second shaft to synchronously rotate in a direction reverse to the rotational direction of the driver.
1. A dual-shaft synchronous transmission device, comprising:
a first shaft having a fixed section and a pivoted section;
a second shaft having a fixed section and a pivoted section;
a driver having a shaft section and a shaft hole formed on the shaft section, the pivoted section of the first shaft being fitted in the shaft hole of the driver to mount the driver on the pivoted section of the first shaft, a crown gear structure being disposed on the shaft section of the driver;
a reactor having a shaft section and a shaft hole formed on the shaft section, the pivoted section of the second shaft being fitted in the shaft hole of the reactor to mount the reactor on the pivoted section of the second shaft, the shaft section of the reactor being parallel to the shaft section of the driver, a crown gear structure being also disposed on the shaft section of the reactor; and
a link unit including a shaft section normal to the shaft sections of the driver and the reactor, the link unit further including spur gear structures at two ends of the shaft section, the spur gear structures being engaged with the crown gear structures of the driver and the reactor, whereby via the link unit, the first shaft with the driver and the second shaft with the reactor can be synchronously rotated in reverse directions;
wherein the driver, the reactor and the link unit are disposed between a main fixing plate and a subsidiary fixing plate, the main fixing plate and the subsidiary fixing plate having identical structures, upper and lower sections of the main fixing plate and the subsidiary fixing plate being respectively formed with perforations, the pivoted sections of the first and second shafts being passed through the perforations to fit the main fixing plate and the subsidiary fixing plate on the first and second shafts, each of the main fixing plate and the subsidiary fixing plate having a base section and a recess formed on the base section for together pivotally connecting with the shaft section of the link unit, permitting the link unit to rotate between the base sections.
2. The dual-shaft synchronous transmission device as claimed in claim 1 , wherein a disc is disposed at one end of the shaft section of the driver and a disc is disposed at one end of the shaft section of the reactor, the crown gear structures being disposed on the discs, the disc having an outer diameter larger than an outer diameter of the shaft section of the driver.
3. The dual-shaft synchronous transmission device as claimed in claim 2 , wherein the recesses of the main fixing plate and the subsidiary fixing plate together form a circular hollow in which the shaft section of the link unit is pivotally fitted, a groove being formed on each of the recesses of the base sections of the main fixing plate and the subsidiary fixing plate.
4. The dual-shaft synchronous transmission device as claimed in claim 2 , wherein each of the pivoted sections of the first and second shafts is assembled with a torque module, the pivoted sections of the first and second shafts, the main fixing plate, the driver, the reactor, the link unit, the subsidiary fixing plate and the torque modules being mounted in a case.
5. The dual-shaft synchronous transmission device as claimed in claim 2 , wherein the fixed sections of the first and second shafts are assembled with fixing seats to respectively fix the first and second shafts on a display module and an apparatus body module of an electronic apparatus.
6. The dual-shaft synchronous transmission device as claimed in claim 1 , wherein the recesses of the main fixing plate and the subsidiary fixing plate together form a circular hollow in which the shaft section of the link unit is pivotally fitted, a groove being formed on each of the recesses of the base sections of the main fixing plate and the subsidiary fixing plate.
7. The dual-shaft synchronous transmission device as claimed in claim 6 , wherein the fixed sections of the first and second shafts are assembled with fixing seats to respectively fix the first and second shafts on a display module and an apparatus body module of an electronic apparatus.
8. The dual-shaft synchronous transmission device as claimed in claim 1 , wherein each of the pivoted sections of the first and second shafts is assembled with a torque module, the pivoted sections of the first and second shafts, the main fixing plate, the driver, the reactor, the link unit, the subsidiary fixing plate and the torque modules being mounted in a case.
9. The dual-shaft synchronous transmission device as claimed in claim 1 , wherein the fixed sections of the first and second shafts are assembled with fixing seats to respectively fix the first and second shafts on a display module and an apparatus body module of an electronic apparatus.
10. A dual-shaft synchronous transmission device, comprising:
a first shaft having a fixed section and a pivoted section;
a second shaft having a fixed section and a pivoted section;
a driver having a shaft section and a shaft hole formed on the shaft section, the pivoted section of the first shaft being fitted in the shaft hole of the driver to mount the driver on the pivoted section of the first shaft, a spur gear structure being disposed on the shaft section of the driver;
a reactor having a shaft section and a shaft hole formed on the shaft section, the pivoted section of the second shaft being fitted in the shaft hole of the reactor to mount the reactor on the pivoted section of the second shaft, the shaft section of the reactor being parallel to the shaft section of the driver, a spur gear structure being also disposed on the shaft section of the reactor; and
a link unit including a shaft section normal to the shaft sections of the driver and the reactor, the link unit further including crown gear structures at two ends of the shaft section, the crown gear structures being engaged with the spur gear structures of the driver and the reactor, whereby via the link unit, the first shaft with the driver and the second shaft with the reactor can be synchronously rotated in reverse directions;
wherein the driver, the reactor and the link unit are disposed between a main fixing plate and a subsidiary fixing plate, the main fixing plate and the subsidiary fixing plate having identical structures, upper and lower sections of the main fixing plate and the subsidiary fixing plate being respectively formed with perforations, the pivoted sections of the first and second shafts being passed through the perforations to fit the main fixing plate and the subsidiary fixing plate on the first and second shafts, each of the main fixing plate and the subsidiary fixing plate having a base section and a recess formed on the base section for together pivotally connecting with the shaft section of the link unit, permitting the link unit to rotate between the base sections.
11. The dual-shaft synchronous transmission device as claimed in claim 10 , wherein the recesses of the main fixing plate and the subsidiary fixing plate together form a circular hollow in which the shaft section of the link unit is pivotally fitted, a groove being formed on each of the recesses of the base sections of the main fixing plate and the subsidiary fixing plate.
12. The dual-shaft synchronous transmission device as claimed in claim 11 , wherein each of two ends of the link unit is formed with a shoulder section, the crown gear structures being disposed on the shoulder sections, the shoulder section having a width larger than a width of the shaft section of the link unit.
13. The dual-shaft synchronous transmission device as claimed in claim 11 , wherein each of the pivoted sections of the first and second shafts is assembled with a torque module, the pivoted sections of the first and second shafts, the main fixing plate, the driver, the reactor, the link unit, the subsidiary fixing plate and the torque modules being mounted in a case.
14. The dual-shaft synchronous transmission device as claimed in claim 11 , wherein the fixed sections of the first and second shafts are assembled with fixing seats to respectively fix the first and second shafts on a display module and an apparatus body module of an electronic apparatus.
15. The dual-shaft synchronous transmission device as claimed in claim 10 , wherein each of two ends of the link unit is formed with a shoulder section, the crown gear structures being disposed on the shoulder sections, the shoulder section having a width larger than a width of the shaft section of the link unit.
16. The dual-shaft synchronous transmission device as claimed in claim 15 , wherein each of the pivoted sections of the first and second shafts is assembled with a torque module, the pivoted sections of the first and second shafts, the main fixing plate, the driver, the reactor, the link unit, the subsidiary fixing plate and the torque modules being mounted in a case.
17. The dual-shaft synchronous transmission device as claimed in claim 16 , wherein the fixed sections of the first and second shafts are assembled with fixing seats to respectively fix the first and second shafts on a display module and an apparatus body module of an electronic apparatus.
18. The dual-shaft synchronous transmission device as claimed in claim 15 , wherein the fixed sections of the first and second shafts are assembled with fixing seats to respectively fix the first and second shafts on a display module and an apparatus body module of an electronic apparatus.
19. The dual-shaft synchronous transmission device as claimed in claim 10 , wherein each of the pivoted sections of the first and second shafts is assembled with a torque module, the pivoted sections of the first and second shafts, the main fixing plate, the driver, the reactor, the link unit, the subsidiary fixing plate and the torque modules being mounted in a case.
20. The dual-shaft synchronous transmission device as claimed in claim 19 , wherein the fixed sections of the first and second shafts are assembled with fixing seats to respectively fix the first and second shafts on a display module and an apparatus body module of an electronic apparatus.
21. The dual-shaft synchronous transmission device as claimed in claim 10 , wherein the fixed sections of the first and second shafts are assembled with fixing seats to respectively fix the first and second shafts on a display module and an apparatus body module of an electronic apparatus.