118results about How to "Adjust the center of gravity" patented technology

The invention relates to a wheelchair and a method thereof. The wheelchair comprises a chair frame and a front lifting device and a rear lifting device which are arranged below the chair frame; the chair frame comprises a chair seat, a cushion part connected to the chair seat in a sliding mode, a pedal part rotatably connected to the front end of the cushion part, a first driving component used for driving the cushion part to slide and a second driving component used for driving the pedal part to rotate; the pedal part is provided with a telescopic end and a driving wheel set arranged at the front end of the telescopic end; the front lifting device is provided with a left front wheel set and a right front wheel set; the driving wheel set, the left front wheel set and the right front wheel set are driven through a hub motor; the chair seat is provided with a front driving component used for driving the front lifting device to rise and fall and a rear driving component used for driving the rear lifting device to rise and fall; the front driving component and the rear driving component are fixed to the chair frame. According to the wheel chair and the method thereof, the requirements of a user for lying and getting on or off the wheelchair can be met.

The invention relates to the technical field of unmanned remote measuring and provides a quick disassembling and assembling shallow diving line type unmanned ship which comprises a main hull, two shallow diving line type floating body modules, two underwater power propulsion modules, and an instrument carrying and central control module which are connected through a rotatable and slidable combined connecting device which has the function of rotation, flexibility and translation. The quick disassembling and assembling shallow diving line type unmanned ship has the advantages that the big quality water surface unmanned ship which has powerful capacity of resisting wind waves and larger bearing capacity is decentralized, the requirements of convenient transportation are met, what is more important is that the easy and accurate adjustment of the centre of gravity and buoyancy of the ship can be realized according to different water area working conditions and the changeable loading conditions, the sailing optimized posture of the hull is guaranteed, and the requirements of carrying various instruments and equipment and normal operation on the unmanned ship are met.

The invention discloses a gravity self-stabilization picking machine. The gravity self-stabilization picking machine comprises a three-claw mechanical arm, a supporting rod and a movable cart, whereinthe three-claw mechanical arm comprises a gravity self-stabilization base and a three-claw clamping apparatus, and the gravity self-stabilization base comprises a U-shaped foundation support, an adjusting rod and a balance weight; and the three-claw clamping apparatus comprises a three-claw clamping mechanism and a rotating motor, the rotating motor is fixed at the outer side of the U-shaped foundation support, the three-claw clamping mechanism comprises a stander, a three-claw manipulator, a transmission assembly and a drive device, the drive device is fixed on the stander, and the stander is connected with an output shaft of the rotating motor in a rotating manner. The gravity self-stabilization picking machine is provided with the gravity self-stabilization base, when a picking objectis not picked, the gravity center of the three-claw mechanical arm is slightly lower than the middle part; after the picking object is picked, the picking object is separated from a fruit tree, the gravity center of the three-claw mechanical arm is slightly higher than the middle part to cause the overturning of the three-claw mechanical arm, and the picking object can vertically fall into a receiving bag; and after the picking object drops, the three-claw mechanical arm overturns again and is returned to an original state to prepare the next operation.

The invention relates to an offshore floating body type suspended oscillating wave power generation device which comprises a mother ship and a water chamber arranged on the mother ship. A water chamber opening is formed in one end of the mother ship. The offshore floating body type suspended oscillating wave power generation device is characterized in that an oscillating assembly adjustable in center of gravity is arranged in the water chamber; the power generation device further comprises a vibration damping plate and a power generation control assembly; the vibration damping plate is connected with the another end of the mother ship; an upright column is arranged on the vibration damping plate; the bottom end of the upright column is fixed at the sea bottom; the power generation control assembly is connected with the oscillating assembly. Compared with the prior art, the offshore floating body type suspended oscillating wave power generation device is capable of floating offshore to collect wave energy, and the parameters of the device can be adjusted according to the wave working conditions within a certain range so that the energy conversion efficiency can be improved; besides, the device is low in site selection limitation, flexible, and excellent in adjustability.

The invention relates to sports equipment, in particular to a billiard cue capable of adjusting weight, centre of gravity and length. The billiard cue comprises a front-end hand rack stick and a rear-end handheld stick, wherein the tail part of the front-end hand rack stick is connected with a connecting rod; the end of the connecting rod close to the rear-end handheld stick is provided with external threads; corresponding internal threads are reserved in an inner hole of the front-end hand rack stick; and a plurality of circular counter weights are sleeved on the connecting rod. Compared with the prior art, the billiard cue has the advantages of simple process, convenient use, easy assembly, firmness, impact resistance; and the weight, the centre of gravity and the length of the billiard cue can be adjusted, so the billiard cue is suitable for different people.

The invention relates to the technical field of bridge construction, in particular to a bridge erecting machine for fast construction of prefabricated bridges. The bridge erecting machine includes a main truss, a rear fulcrum and a front fulcrum, wherein the main truss is provided with a crane for lifting prefabricated pier columns, prefabricated cover beams and steel main beams; the rear fulcrumcomprises a rear leg arranged at the rear end of the main truss and a middle rear leg positioned in front of the rear leg; the upper end of the middle rear leg is fixed on the main truss, and the lower end is provided with a rolling structure capable of driving the middle and rear leg to travel along the assembled bridge deck; the front fulcrum comprises a front leg and a leveling structure resting on the ground below the front end of the main truss; and the front leg is a vertical support structure whose lower end is supported on the leveling structure, and the upper end of the front leg is fixed on the front end and lower part of the main truss. The bridge erecting machine for fast construction of prefabricated bridges can complete the installation of all components such as the prefabricated pier columns, the prefabricated cover beams, the steel main beams and the like, can realize the simultaneous construction of the upper and lower structures of the bridge, and can effectively improve the construction efficiency of the site.

The invention discloses a cross-medium sea-air amphibious unmanned aerial vehicle. The unmanned aerial vehicle comprises an aerial flight mechanism and an underwater submerging mechanism; the air flight mechanism comprises a coaxial reverse propeller lift structure for providing lift and a steering engine tilting platform control structure for controlling the attitude of an aircraft; the underwater submerging mechanism comprises a posture-gravity center adjusting structure for achieving switching between a horizontal posture and a vertical posture of a vehicle body, a posture tail vane adjusting structure for achieving underwater motion posture adjustment and an underwater power structure for providing underwater submerging power; and the coaxial reverse propeller lift structure, the steering engine tilting platform control structure, the posture-gravity center adjusting structure, the posture tail vane adjusting structure and the underwater power structure are coaxially arranged in sequence from top to bottom. The whole unmanned aerial vehicle is designed in a streamline mode, the bamboo dragonfly type unmanned aerial vehicle and the underwater AUV are perfectly combined, and a brand-new sea-air amphibious unmanned aerial vehicle type is formed.

An electric straddled vehicle which has, despite the fact that the vehicle is a lightweight and inexpensive vehicle using a small-sized, highly versatile motor, the balance of weight in the left-right in the width direction of the vehicle relative to the vehicle body centerline is optimized. An electric motor (250) is disposed within a cantilever swing arm (214) at a position at which, when viewed from a side of the vehicle body, the electric motor is superposed on the region in which a rear wheel (WR) is projected. A motor driver (216) is disposed within the swing arm (214) so as to straddlethe vehicle body centerline (C) at a position in front of the rear wheel (WR) relative to the vehicle body. The motor driver (216) is disposed in such a manner that the position (G2) of the center ofgravity thereof is offset to the side opposite to the side to which the electric motor (250) is offset from the vehicle body centerline (C). The motor driver (216) is provided behind a rocking shaft (215) relative to the vehicle body at a position close to the rocking shaft (215) and is inserted and mounted to a recess (308) open to the upper surface side of the swing arm (214). An FET (316) for conducting and interrupting an electric current to the motor is at least supported on the lower surface of a lid member (264) of the motor driver (216).

The invention discloses a comprehensive figure training machine for classical dance. The device (the figure training machine) comprises a bracket, wherein leg stretching devices are arranged on a pair of upper transverse frame rods of the bracket; a seat cushion is connected to a lower transverse frame rod of the bracket by virtue of a connecting rod; a leaning cushion is arranged on the back section of the seat cushion; a brachialis cushion is arranged at the upper end of the seat cushion; a pull rod is arranged at the front end of the seat cushion; a balance weight mounting rack is arranged at the lower end of the pull rod; a strength training device is connected to the left side of the bracket by virtue of a left connecting rod; and the right side of the bracket is connected to a base in a waist and abdomen strength training device by virtue of a right connecting rod. The training machine, in accordance with figure training properties of the classical dance, focuses on body shaping and stretching functions and integrates upper limb stretching and lower limb coordination; and meanwhile, the training machine emphasizes strength training, so that a requirement of conducting comprehensive figure training on dancers differing in sexes and roles can be satisfied.

The invention discloses a system for adjusting torque required by a robot driving device, belongs to the technical field of mobile robots, and solves the problems that the main body of the conventional mobile robot is fixed in structure, unadjustable in gravity center and too large in rotational inertia. The system comprises a counterweight, a counterweight supporting component and a counterweight moving component, wherein the counterweight is connected with the counterweight moving component through the counterweight supporting component; the counterweight can change position in a robot structure. Compared with the conventional system with a fixed structure, the system provided by the invention has the advantages as follows: the control performance is significantly improved; on one hand, the gravity center of a robot system can be controllably changed, the rotational inertia of the overall system can be adjusted, the torque can be reduced, and the working intensity of the driver is reduced; on the other hand, the posture of a robot can be controlled more precisely so as to improve the operating performance of the robot.

The invention discloses an underwater robot movement posture adjusting device and method. The underwater robot movement posture adjusting device comprises a base, a supporting seat, a balancing mechanism, a rotating table, a bearing table, a barycenter trimming mechanism, a plurality of load blocks and a control mechanism, wherein the bearing table is arranged at the telescopic ends of three telescopic mechanisms, the barycenter trimming mechanism is arranged at the top of the bearing mechanism and is provided with a slide block, the slide block is provided with a lifting mechanism, the load blocks are arranged at the upper end of the bearing table in a slide mode and are erected at the upper end of the barycenter trimming mechanism, a penetrating hole is formed in the center of each loadblock in a penetrating mode, the inner diameter of each penetrating hole is no less than the outer diameter of the lifting end of the lifting mechanism, the lifting end of the lifting mechanism extends into the penetrating holes in a selective mode, and the control mechanism is correspondingly connected with the telescopic mechanisms and the barycenter trimming mechanism. The barycenter and postures of a robot can be adjusted actively to meet working requirements of the robot, and the technical problem of posture adjusting difficulty of an underwater robot is solved.

The invention discloses a truck balance adjusting device. The structure of the truck balance adjusting device comprises a chassis frame, a balance adjusting device, a rear window, a truck head, windows, rear-view mirrors, truck doors, bumpers, iron stand ladders, wheels, a fuel tank, a gear rolling track, a balancing roller device, an outer casing, unbalance transmission mechanisms, starting devices, servo motor devices, telescopic transmission mechanisms, gear rotating mechanisms and gravity center balance detection devices. According to the truck balance adjusting device, as the balance adjusting device is arranged on the structure and connected with the top end of the chassis frame, the truck balance adjusting device can efficiently adjust the balance of a truck and rapidly adjust the gravity center balance of the truck so as to prevent the truck from seriously shaking from side to side and rolling over.

The invention discloses a lifting type storage shelf, and belongs to the field of logistics. The lifting type storage shelf comprises a bottom plate and a plurality of bearing plates, wherein supporting legs are arranged on the lower surface of the bottom plate; a plurality of upright columns vertical to the bottom plate are arranged on the upper surface of the bottom plate; the upright columns are provided with guiding rails parallel to the upright columns and racks; the bearing plates are connected to the upright columns in a sliding way; the bearing plates are provided with lifting motors;the lifting motors are connected with deceleration motors; gears matched with the racks are arranged on the output ends of the deceleration machines. The lifting type storage shelf disclosed by the invention is simple in structure and reasonable in design, not only an instable situation caused by gravity center rising during unloading of a bottom layer of the lifting type storage shelf can be avoided, but also the interlayer spacing can be flexibly adjusted according to the height of cargoes.

The invention relates to aircrafts, in particular to an octahedral aircraft. The octahedral aircraft comprises an upper shell body, a middle shell body, a lower shell body, counterweight assemblies, a circuit supporting frame upper cover, a main circuit board, a circuit supporting frame, ducted fan assemblies and a battery, wherein the upper shell body, the middle shell body and the lower shell body are sequentially connected to form an octahedral cavity; and the counterweight assemblies, the circuit supporting frame upper cover, the main circuit board, the circuit supporting frame, the ducted fan assemblies and the battery are contained in the octahedral cavity. The upper shell body and the lower shell body are each provided with at least one ducted fan assembly. The circuit supporting frame is installed on the middle shell body and contains the main circuit board installed on the middle shell body. The circuit supporting frame upper cover is arranged at the top of the circuit supporting frame. The multiple counterweight assemblies are uniformly distributed on the circuit supporting frame upper cover. The ducted fan assemblies installed on the middle shell body are arranged on the periphery of the circuit supporting frame in the front, back, left and right directions. The battery is installed on the middle shell body and connected with the main circuit board. All the ducted fan assemblies are connected with the main circuit board. The upper shell body is provided with a switch connected with the main circuit board. The octahedral aircraft is novel in structure, flexible in control and suitable for the flight monitoring service in a space station cabin.

The invention relates to the technical field of teaching aids for students, in particular to a student drawing board and bracket with the ability to adjust the universal rotation. There is a groove inside the side of the base, one end of the weight plate is embedded in the groove, and a weight is installed on the upper end. , the sleeve is installed on the base, the vertical rod is provided with a sliding tube, the top is provided with a hinge shaft, and the back of the drawing board is provided with two cross bars. The damping shaft on the sliding cylinder is connected by two struts, and the struts are hinged through the hinge shaft. The end of the Y-shaped bracket connected to the cross bar and the end of the strut are equipped with plug joints, and the hinge shaft is equipped with Fastening bolts are provided on the tightener, the sleeve and the sliding cylinder. The structure design of the present invention is reasonable, and adopts telescopic support structure to install brackets and poles, and the drawing board is installed on the brackets and poles. Through the combined connection structure of hinge shaft, damping shaft and plug joint, it can realize freedom in any height, direction and angle. Adjustment, simple operation, stable and reliable, suitable for students to use.

The invention provides a novel backhoe loader. The novel backhoe loader solves the problem that in the prior art, an engineering machine only has a single function and is low in construction efficiency. The novel backhoe loader comprises a movable vehicle body. A loading portion is arranged at one end of the vehicle body, and an excavation portion is arranged at the other end of the vehicle body.A cab is further arranged on the vehicle body and located between the loading portion and the excavation portion. The loading portion is located on the center line in the front-back direction of the vehicle body. The cab is located on one side of the center line. One side of the cab is further provided with a standby platform used for storing accessories. The excavation portion comprises a first rotating base and an excavation big arm installed on the first rotating base. The first rotating base drives the excavation big arm to rotate by 360 degrees in the horizontal plane. When the excavationbig arm rotates to be in the same direction with the front-back direction of the vehicle body, the excavation big arm is located on one side of the cab, and the tail end of the excavation big arm islocated on the standby platform. The novel backhoe loader is simple in structure and convenient to use, has multiple functions, can cooperate to complete multiple different operations, greatly improves the construction efficiency and has good practicability.