6 results about "Symmetric structure" patented technology

The invention discloses a multi-plate magnetorheological soft start device, which is characterized in that: a right shaft is in threaded connection with a right sealing disk; the outer ring of the right sealing disk is provided with a key groove which is matched with internal teeth of internal friction plates; a left shaft is in threaded connection with a left sealing disk; the left sealing disk is connected with a sealing ring through a screw; the inner ring of the sealing ring is provided with a key groove which is matched with external teeth of external friction plates; the internal friction plate and the external friction plates are alternately arranged; a magnet exciting coil is arranged between a left end plate and a right end plate; and the upper part of the right end plate is provided with a fluid injecting bolt, and the lower part of the right end plate is provided with a fluid discharging bolt. Magnetorheological fluid is taken as a working medium, the in-plate magnetic induction density is regulated by controlling the current of the magnet exciting coil, and the transmission torque is changed, so that the controlled soft start of heavy mechanical equipment is realized. The multi-plate magnetorheological soft start device has a hollow symmetrical structure, has high heat dissipation and high reliability and is convenient to operate.

The invention relates to a combined type aerostatic bearing support mechanism, and belongs to the technical field of torque metering calibration. For improving support mechanisms at the middle parts of force arm levers of traditional standard torque generation devices, the combined type aerostatic bearing support mechanism with a symmetric structure is adopted, so that a series of problems in thetraditional structure are overcome, and the characteristics of reducing the realization difficulty and fault rate and prolonging the service life are increased. Correspondingly, the combined type aerostatic bearing support mechanism is capable of improving the force arm levers into single-beam double-arm symmetric frame structures, so as to effectively ensure the measurement correctness of the force arm levers on the basis of reducing the lever processing and assembling difficulty.

The invention provides an ore impurity precipitation machine. The machine comprises a bottom support plate, a backflow plate and a positioning tank, wherein a servo motor is fixedly arranged in the center of the bottom of the bottom support plate, the periphery of the bottom of the servo motor is fixed at the bottom ends of inner sides of vertical rectangular support plates arranged at two ends ofthe top of the bottom support plate through a surrounding I-shaped fixing rack; a rotating shaft at the top of the servo motor is rotationally connected in a mixing homogenizer on the upper side, andsix support columns surrounding the servo motor are arranged between the mixing homogenizer and the bottom support plate. T-shaped pipes and electromagnetic control valves are arranged, the T-shapedpipes are arranged at the top of the mixing homogenizer, two symmetric electromagnetic control valves are arranged on the T-shaped pipes, so that two symmetric structures are arranged on two sides ofthe mixing homogenizer, the device on one side can be reserved for normal operation during replacement of a precipitation barrel, the continuity of the process can be guaranteed, and the production pause cost is reduced.

The invention discloses a multi-chamber suspended non-viscous packaging box. In a multi-chamber display board, a left side baffle, a left front baffle, a chamber partition, a right front baffle and a right side baffle are sequentially connected through a folded line and form a symmetric structure; the left side baffle is connected with the side of the lower portion of a suspension board through the folded line; the right side baffle is connected with one end of a back board through the folded line; the lower portion of the left front baffle is connected with a left bottom baffle through the folded line, and the lower portion of the right front baffle is connected with a right bottom baffle through the folded line; the suspension board is provided with a suspension hole and a plurality of locating clamp grooves; and a back board inserting tongue is arranged at one end of the back board. According to the multi-chamber suspended non-viscous packaging box, glue or self-locking knots can be avoided, flat stacking is convenient, and reusing is facilitated; and two or more chambers can be formed according to needs, displayed goods can be conveniently arranged, classification is clear, and arrangement is easy.

The invention relates to the technical field of shoes, in particular to a shoe heel. The shoe heel comprises a shoe heel body. A plurality of circular grooves distributed of a center symmetric structure are formed in the bottom of the shoe heel body. A through hole is formed in the centers of the circular grooves. A metal column is arranged in the through hole. One end of the metal column is fixed to the top end of the shoe heel body. The other end of the metal column is fixedly provided with a base plate. The base plate is located in the circular grooves. The bottom face of the base plate is flush with the bottom face of the shoe heel body. The base plate is sleeved with an anti-friction sleeve. According to the technical scheme, the shoe heel is simple in structure and reasonable in technology, the anti-friction sleeve can be disassembled and replaced, when the shoe heel body makes contact with the ground after the anti-friction sleeve is abraded, the anti-friction sleeve is replaced, and therefore the shoe heel body is prevented from making contact with the ground and being abraded, and the service life of the shoe heel is greatly prolonged.