[0026] The following describes in detail a powerless differential based on speed synthesis of the present invention with reference to the accompanying drawings and embodiments.
[0027] Such as figure 1 As shown, the differential of the present invention mainly includes a first input gear 1, a second input gear 2, a first coaxial gear 3, a second coaxial gear 4, a small sun gear 5, a large sun gear 6, and a short planetary gear 7. Long planetary gear 8, output gear 9, planet carrier 10, cage 11, planet carrier support bearing 12, cage support bearing 13, short planetary gear strut 14, long planetary gear strut 15, support housing 16, and housing End cap 17.
[0028] Among them, the first input gear 1 is used for input rotation, and the first input gear 1 meshes with the first coaxial gear 3. The first coaxial gear 3 and the small sun gear 5 are coaxial, and the two are respectively fixedly installed at both ends of the first transmission shaft 301, so that the first coaxial gear 3 and the small sun gear 5 can rotate synchronously, the first transmission shaft 301 It is a cylindrical solid shaft.
[0029] The second input gear 2 is used for input rotation, and the second input gear 2 meshes with the second coaxial gear 4. The second coaxial gear 4 meshes with the large sun gear 6 coaxially, and the two are respectively fixedly installed at both ends of the second transmission shaft 401, so that the second coaxial gear 4 and the large sun gear 6 can rotate synchronously. The second transmission shaft 401 is cylindrical and is installed outside the first transmission shaft 301 through a support bearing, so that the second coaxial gear 4 and the large sun gear 6 are located between the first coaxial gear 3 and the small sun gear 5 in space. In addition, the second transmission shaft 401 and the first transmission shaft 301 can rotate freely coaxially.
[0030] The small sun gear 5 meshes with the short planetary gear 7, and the short planetary gear 7 is mounted on the short planetary gear support 14 through a supporting bearing. The short planetary gear 7 can freely rotate in the circumferential direction relative to the short planetary gear support 14. The two ends of the short planetary wheel support 14 are respectively mounted on the planet carrier 10 and the cage 11 through the shaft hole fit and the lock nut to be fixed between the planet carrier 10 and the cage 11 to ensure that the short planetary wheel 7 can be free The ground rotates around its own axis.
[0031] The support housing 16 is cylindrical with open ends. The planet carrier 10 and the cage 11 are installed inside the support housing 16 through the planet carrier support bearing 12 and the cage support bearing 13, so that the planet carrier 10 and the cage 11 can It rotates in respective axial directions in the support housing 16.
[0032] The cage 11 is disc-shaped with a through hole in the middle. The second transmission shaft 401 and the first transmission shaft 301 pass through the through hole, so that in space, the small sun gear 5 and the large sun gear 6 are located on the planets. In the space between the rack 10 and the holder 11.
[0033] The planet carrier 10 is in the shape of a disc, and an output shaft 1001 is arranged in the middle, and the output gear 9 is fixedly installed on the output shaft 1001 for outputting rotation.
[0034] The two ends of the long planetary gear support 15 are installed between the planet carrier 10 and the cage 11 through shaft hole fitting and lock nuts to ensure that the long planetary gear 8 can rotate around its own axis. The long planetary gear 8 is mounted on the long planetary gear strut 15 through a supporting bearing, and is located between the planet carrier 10 and the cage 11. The long planetary gear 8 can rotate around the axial direction of the long planetary gear strut 15. The long planetary gear 8 meshes with the large sun gear 6 and the short planetary gear 7 at the same time.
[0035] The end of the first transmission shaft 301 close to the small sun gear 5 is installed in the middle of the planet carrier 10 through a support bearing. The end of the first transmission shaft 301 close to the first coaxial gear 3 is also provided with a support bearing for the same purpose as other devices. Connection.
[0036] The housing end cover 17 is installed on the opening on one side of the support housing 16, and the middle of the housing end cover 17 is provided with a through hole through which the output shaft 1001 and the output gear 9 can pass. The housing end cover 17 and the support housing 16 together constitute a protection for the equipment installed in the space formed by the two.
[0037] The short planetary wheel struts 14 and the long planetary wheel struts 15 are respectively located at the outer ends of the planet carrier 10 and the cage 11, and nuts are respectively installed to lock the short planetary wheel struts 14 and the long planetary wheel struts 15 to prevent locking The short planetary gear support 14 and the long planetary gear support 15 move and rotate along their respective axial directions.
[0038] The corresponding position of the first transmission shaft 301 where the small sun gear 5 is installed and the inner hole of the gear of the small sun gear 5 are provided with key grooves. The flat key 18 is installed in the key groove to ensure the small sun gear 5 and the first transmission shaft. 301 synchronous rotation.
[0039] There are two support bearings installed in the gear inner hole of the short planetary gear 7, and the gear inner hole of the short planetary gear 7 is a stepped hole. The two support bearings are installed in the large hole of the stepped hole, between the large hole and the small hole of the stepped hole The end surface of the two supporting bearings installed in the short planetary gear 7 forms a limit for the axial movement of one side. On the other side of the two support bearings, an elastic retaining ring is also installed on the short planetary wheel strut 14 to constitute a limit for the support bearing to move to the other side in the axial direction.
[0040] There are two support bearings installed in the inner hole of the gear of the long planetary gear 8, and elastic retaining rings are installed on the long planetary gear struts 15 outside of the two support bearings to restrict the two support bearings from sliding out of the long planet. Wheel 8 moves in the direction of the inner hole of the gear.
[0041] The large sun gear 6, the long planetary gear 8 and the planet carrier 10 constitute a single-row planetary gear set, and the small sun gear 5, the short planetary gear 7, the long planetary gear 8 and the planet carrier 10 constitute a double-row planetary gear set. This planetary gear system does not have an inner ring gear, and the large sun gear 6 and the small sun gear 5 can serve as the inner ring gear of each other.
[0042] When only the first input gear 1 is used to input rotation, the second input gear 2 should be locked and not rotated. Then the first input gear 1 is used to drive the first coaxial gear 3 to rotate, thereby driving the small sun gear 5 to rotate synchronously. Since the small sun gear 5 meshes with the short planet gear 7, the small sun gear 5 will drive the short planet gear 7 to rotate synchronously. Since the short planetary gear 7 and the long planetary gear 8 mesh, the short planetary gear 7 will drive the long planetary gear 8 to rotate synchronously. The long planetary gear 8 rotates while the second input gear 2 is locked and does not rotate, and the large sun gear is stationary 6 It also acts as a double-row planetary gear inner ring gear, so that the long planetary gear 8 revolves around the large sun gear 6, thereby driving the planet carrier 10 and the cage 11 to rotate, and finally output rotation through the output gear 9 at the same speed.
[0043] When only the second input gear 2 is used to input rotation, the first input gear 1 should be locked and not rotated. The second coaxial gear 4 is driven by the second input gear 2 to rotate. The second coaxial gear 4 in turn drives the coaxial large sun gear to rotate 6 synchronously. Because the large sun gear rotates 6 and the long planetary gear 8 meshes, the long The planetary gear 8 rotates synchronously. Because the long planetary gear 8 and the short planetary gear 7 mesh, the short planetary gear 7 will be driven by the long planetary gear 8. At the same time, because the first input gear 1 is locked and does not rotate, the small sun gear 5 At a standstill and acting as the inner ring gear of the single-row planetary gear, the short planetary gear 7 revolves around the small sun gear 5, thereby driving the planet carrier 10 and the cage 11 to rotate, and finally output rotation through the output gear 9 at the same speed.
[0044] When the first input gear 1 and the second input gear 2 simultaneously input and rotate in the same direction, the rotation speeds of the planet carrier 10 and the cage 11 increase, and the output gear 9 outputs the combined speed of the two.
[0045] When the first input gear 1 and the second input gear 2 rotate in opposite directions at the same time, the rotation speeds of the planet carrier 10 and the cage 11 are reduced, and the output gear 9 outputs the combined speed of the two.
