Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd.
대리인 / 주소
Altis Law Group, Inc.
인용정보
피인용 횟수 :
6인용 특허 :
17
초록▼
A robot arm assembly includes a support arm, and the support arm includes a mounting base and a connecting portion defining a hollow portion. The robot arm assembly further includes a first arm, a second arm, a first input shaft, a second input shaft coaxial with and rotatable relative to the first
A robot arm assembly includes a support arm, and the support arm includes a mounting base and a connecting portion defining a hollow portion. The robot arm assembly further includes a first arm, a second arm, a first input shaft, a second input shaft coaxial with and rotatable relative to the first input shaft, a first gear transmission mechanism coupled to the first input shaft to rotate the first arm, a second gear transmission mechanism coupled to the second input shaft to rotate the second arm, and a first backlash adjust mechanism to adjust the positions of the connecting portion, of the first and second input shafts relative to the mounting base, and providing the adjustment of the backlash between the first input gear pair and the second input gear pair.
대표청구항▼
1. A robot arm assembly comprising: a support arm comprising a mounting base and a connecting portion connected to the mounting base, and the connecting portion defining a hollow portion;a first arm rotatably connected to the support arm;a second arm rotatably connected to the first arm;a first inpu
1. A robot arm assembly comprising: a support arm comprising a mounting base and a connecting portion connected to the mounting base, and the connecting portion defining a hollow portion;a first arm rotatably connected to the support arm;a second arm rotatably connected to the first arm;a first input shaft;a second input shaft coaxial with and rotatable relative to the first input shaft, and the first and second input shafts being rotatably received in the hollow portion;a first gear transmission mechanism coupled to the first input shaft to rotate the first arm, the first gear transmission mechanism comprising a first input gear pair having one gear fixed to the first input shaft, and a first output bevel gear pair having one bevel gear fixed to the first arm;a second gear transmission mechanism coupled to the second input shaft to rotate the second arm, the second gear transmission mechanism comprising a second input gear pair having one gear fixed to the second input shaft, an intermediate bevel gear pair, and a second output bevel gear pair having one bevel gear fixed to the second arm;a first backlash adjust mechanism to move the connecting portion, and the positions of the first and second input shafts relative to the mounting base, thus adjusting the backlash between the first input gear pair and the second input gear pair; anda second backlash adjust mechanism to adjust the backlash between the second output bevel gear pair, wherein the first arm defines a first assembly hole along a central axis thereof, and a second assembly hole extending radially and intersecting with the first assembly hole, the second arm is rotatable received in the second assembly hole, and the first and second output bevel gear pairs are received in the first assembly hole, the second backlash adjust mechanism comprising a first thrust bearing mounted in the second assembly hole and contacting an end of the second arm, an adjust member engaging into the second assembly hole and contacting the first thrust bearing and adjusting the axial position thereof, an elastic member elastically biasing the second arm toward the first thrust bearing, and a second thrust bearing positioned between an inner surface of the first arm and the elastic member. 2. The robot arm assembly of claim 1, wherein the first backlash adjust mechanism comprises a plurality of through holes defined in the connecting portion, a plurality of threaded holes defined in the mounting base, and a plurality of fasteners each of which is received in the corresponding through hole and engaged into the corresponding threaded hole; each through hole has a larger diameter than that of the fastener to allow radial movement of the corresponding fastener. 3. The robot arm assembly of claim 1, wherein the first input shaft is a hollow structure and sleeved on the second input shaft. 4. The robot arm assembly of claim 1, further comprising at least one roll bearing for supporting the second input shaft. 5. The robot arm assembly of claim 1, wherein the first input gear pair are a plurality of cylindrical gears, and the first output bevel gear pair are a plurality of hypoid bevel gears. 6. The robot arm assembly of claim 1, wherein the second input gear pair are a plurality of cylindrical gears, and the second output bevel gear pair are a plurality of hypoid bevel gears. 7. The robot arm assembly of claim 1, wherein the gear of the first input gear pair fixed to the first input shaft is parallel to and offset from the gear of the second input gear pair fixed to the second input shaft. 8. The robot arm assembly of claim 1, further comprising a first gear shaft, a second gear shaft, a first shaft base and a second shaft base mounted in the mounting base, wherein the mounting base defines a receiving chamber toward the connecting portion, the receiving chamber comprising a bottom surface defining a first shaft hole and a second shaft hole to receive the first and second gear shafts, respectively, and the first and second gear shafts are supported by the first and second shaft bases, respectively. 9. The robot arm assembly of claim 1, wherein the second backlash adjust mechanism further comprises a sleeve on the second arm, and the sleeve is positioned between the elastic member and the gear of the second output bevel gear pair fixed to the second arm. 10. The robot arm assembly of claim 9, wherein the elastic member comprises a plurality of stacked disc-shaped sheets. 11. The robot arm assembly of claim 1, wherein the second assembly hole forms an inner threaded segment, and the adjust member engages with the inner threaded segment.
Schaib Albert (Ettishofen DEX) Manogg Horst (berlingen DEX) Hrl Adolf (Friedrichsafen DEX), Triaxial hinge for robots, handling apparatus and the like.
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