Abstract: A parallel robot includes a fixed platform, a movable platform, and a plurality of chains positioned in parallel between the fixed platform and the movable platform. Each chain includes a first connecting member, a second connecting member, a first ball joint, and a second ball joint. The first connecting member connects to the second connecting member with a prismatic joint. The first connecting member connects to the fixed platform via the first ball joint, and the second connecting member connects to the movable platform via the second ball joint. Each of the first and second ball joints includes a ball member, a socket member, and a resilient pressing mechanism. The ball member couples with the socket member. The resilient pressing mechanism is positioned between the ball member and the socket member, applying compression to cause the ball member to tightly contact the socket member.

Abstract: A robot arm assembly includes a first arm, a second arm; a first transmission assembly and a second transmission assembly. The first transmission assembly includes a first rotation shaft having a first bevel gear portion, a second rotation shaft having a second bevel gear portion engaging with the first bevel gear portion, and a third rotation shaft non-rotatably connected to the second rotation shaft. The second transmission assembly includes a forth rotation shaft and a fifth rotation shaft. The forth rotation shaft is rotatably sleeved on the first rotation shaft and includes a forth bevel gear potion. The fifth rotation shaft is rotatably sleeved on the second rotation shaft and includes a fifth bevel gear portion engaging with the forth bevel gear portion. An end of the fifth rotation shaft opposite to the fifth bevel gear portion is connected to the second arm.

Abstract: A 3DOF universal joint includes a first connecting base, a second connecting base, a two-way hinged member, and a third connecting base. The first connecting base and the second connecting base are rotatably mounted together via the two-way hinged member along a first axis and a second axis substantially perpendicular to the first axis. The third connecting base is rotatably assembled to the second connecting base along a third axis substantially perpendicular to the first and second axes.

Abstract: A parallel robot includes a base, a movable platform, an actuator, and four control arms. The actuator is positioned on the movable platform. The control arms are interconnected between the base and the movable platform. Each control arm includes a driving member connected to the base, an action pole driven by the driving member, and a four-rod linkage assembly interconnected between the action pole and the movable platform. One end of the four-rod linkage assembly is connected to the action pole via a first rotary joint, and the other end of the four-rod linkage assembly is connected to the movable platform via a second rotary joint. An axis of the first rotary joint is substantially parallel to an axis of the second rotary joint.

Abstract: A multi-spindle gearbox system includes a gearbox, a gear assembly, an output sleeve spindle, and a cable receiving barrel. The gearbox includes a base and a sealing cover covering the base. The sealing cover forms a hollow box space together with the base receiving the gear assembly therein. The base defines an assembly hole therethrough. The sealing cover defines a guiding hole corresponding to the assembly hole of the base. The output sleeve spindle is hollow and cylindrical with one end thereof assembled to the assembly hole of the base corresponding to the gear assembly. The cable receiving barrel is assembled within the gearbox. One end of the cable receiving barrel connects with the assembly hole and the other end of the cable receiving barrel passes through the guiding hole and is exposed to an outer side of the sealing cover.

Abstract: A robot arm mechanism includes a first shaft assembly, a second shaft assembly, a first motor, a second motor, and an air tubing assembly. The second shaft assembly is rotatably assembled with the first shaft assembly. The first motor is selectively assembled within the first shaft assembly or the second shaft assembly. The air tubing assembly is assembled within the first shaft assembly or the second shaft assembly, and surrounds the first motor for cooling down the first motor, surrounds the second motor for cooling down the second motor, and cooling down the inner temperature of the robot. A robot using the robot arm mechanism is further provided.

Abstract: A robotic arm assembly includes a first segment, a second segment, a first driving device, a first transmission mechanism, a second driving device, and a second transmission mechanism. The second segment is rotatably connected to the first segment. The first driving device drives the second segment to rotate about a first axis relative to the first segment via the first transmission mechanism. The second transmission mechanism includes a first bevel gear and a second bevel gear meshed with the first bevel gear. An output shaft is fixed to the second bevel gear, and the output shaft is capable of rotating about a second axis. Each of the second segment, the output shaft, and the second bevel gear defines a guiding hole, and the guiding holes are aligned in the second axis.

Abstract: A gear transmission device includes a first input shaft, a first transmission gear, a first output shaft, and a first gear clearance adjustment mechanism. The first transmission gear sleeves on the first input shaft. The first gear clearance adjustment mechanism includes two adjustment gears. The two adjustment gears separately sleeve on the first output shaft and both mesh with the first transmission gear, such that the first input shaft is rotatably assembled with the first output shaft. Two sides of gear teeth of the first transmission gear resist gear teeth of the two adjustment gears respectively, such that the first transmission gear and the two adjustment gears are prevented from damage by interference. Therefore, a collision force and a noise between the first transmission gear and the two adjustment gears are decreased. The invention also provides a robot arm using the gear transmission device.

Abstract: One particular embodiment clusters a plurality of documents using one or more clustering algorithms to obtain one or more first sets of clusters, wherein: each first set of clusters results from clustering the documents using one of the clustering algorithms; and with respect to each first set of clusters, each of the documents belongs to one of the clusters from the first set of clusters; accesses a search query; identifies a search result in response to the search query, wherein the search result comprises two or more of the documents; and clusters the search result to obtain a second set of clusters, wherein each document of the search result belongs to one of the clusters from the second set of clusters.

Abstract: A robot includes a first rotation member, a second rotation member, a driver, a cable assembly, a transmission assembly, and a guide member. The second rotation member is rotatably connected to the first rotation member, and capable of rotating about a rotation axis. The driver is configured to drive the second rotation member. The cable assembly includes a plurality of cables with at least one cable connecting to the driver. The transmission assembly is configured to transmit rotation from the driver to the second rotation member. The guide member is fixed to the first rotation member, and defines a guide hole extending along the rotation axis, through which the cable assembly passes. The second rotation member and the driver are disposed at distances deviating from the rotation axis.

Abstract: 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.

Abstract: A mechanical joint includes a first axial bracket, a first bearing, a second bearing, a sleeve, a second axial bracket, and an anti jamming mechanism. The first axial bracket includes a rotary shaft. The first bearing, the second bearing, and the sleeve sleeve on the rotary shaft of the first axial bracket in turn, the sleeve being sandwiched between the first and second bearings. The second axial bracket is rotatably assembled to the first axial bracket via the first and second bearings. The anti jamming mechanism is resiliently assembled within the second axial bracket and sleeves on the sleeve. One end of the anti jamming mechanism resists the second axial bracket and the opposite second bearing.

Abstract: A robot arm assembly includes a support arm, a connecting arm, and an end arm. The support arm is rotatably assembled with the connecting arm along a first axis, and is located at one end of the connecting arm. The end arm is rotatably assembled to the other end of the connecting arm along a second axis substantially perpendicular to the first axis, such that the connecting arm is rotatably assembled between the support arm and the end arm.

Abstract: A gear includes an outer gear ring, an inner gear ring, and one or more elastic members. The inner gear ring engages the outer gear ring. The inner gear ring forms one or more sliding portions. The outer gear ring defines one or more sliding grooves receiving the sliding portions. The elastic members are positioned in the sliding grooves. The sliding portions are received in the sliding grooves, and resist the elastic members. A transmission mechanism using the gear is also provided.

Abstract: A robot arm assembly includes a first robot arm and a second robot arm; the second robot arm is rotatably connected to the first robot arm. The first robot arm includes a first sleeve, a first input shaft, and a second input shaft. The first input shaft and the second input shaft are seated in the first sleeve. The second robot arm includes a second sleeve and an output shaft; the output shaft is received in the second sleeve. The first input shaft is connected to the second sleeve via a pair of bevel gears, and drives the second sleeve to swing relative to the first sleeve. The second input shaft is connected to the output shaft via a plurality of bevel gears meshing with each other, and drives the output shaft to rotate relative to the second sleeve.

Abstract: A robot arm assembly includes a first robot arm and a second robot arm rotatably connected to the first robot arm. The first robot arm includes a first sleeve, a first input shaft, and a second input shaft. The first input shaft and the second input shaft are seated in the first sleeve. The second robot arm includes a second sleeve and an output shaft received in the second sleeve. The first input shaft is connected to the second sleeve via a pair of bevel gears, and drives the second sleeve to rotate relative to the first sleeve. The second input shaft is connected to the output shaft via at least two pairs of bevel gears, and drives the output shaft to rotate relative to the second sleeve.

Abstract: A robot arm assembly includes a first robot arm and a second robot arm rotatably connected to the first. The first robot arm includes a first input shaft and a second input shaft. The second robot arm includes a sleeve and an output shaft partially received in the sleeve. The sleeve of the second robot arm is rotated relative to the first robot arm via a pair of bevel gears. The output shaft is rotated relative to the sleeve via a plurality of bevel gears which cooperatively form a polygon.

Abstract: This invention discloses an elliptical exercise apparatus that is characterized in having left and right tracks disposed in a guider frame which is pivotally coupled to a rear portion of the elliptical exercise apparatus. When a user uses the elliptical exercise apparatus, the guider frame is at a use position. When the user folds the elliptical exercise apparatus, the guider frame is at a storage position. A user can complete folding procedure merely by operating the guider frame without lifting some heavy components of the elliptical exercise apparatus.