125results about How to "Reduce rolling friction" patented technology

A roller / foot device (1) comprising a cylindrical outer sleeve (10), a guide sleeve (20) arranged inside the outer sleeve (10), locking sleeve (30) arranged inside the outer sleeve (10), a spring device where one end abuts against the outer sleeve's closed end (13) and the other end abuts against one end portion of the guide sleeve or the locking sleeve and a roller element (41) which is rotatably mounted abutting against the locking sleeve's (20) end portion which is located at the extreme end of the outer sleeve (10). The sleeves comprise ribs which can slide towards each other and cause the roller element (41) to assume different positions in the longitudinal direction of the outer sleeve (10) when the device (1) is subjected to forces. The device (1) can thereby be employed as a roller device with the roller element (41) in an outer position and as a foot device with the roller element (41) in an inner position.

The invention relates to a coaxial bidirectional stirring device which comprises an inner rotating shaft and an outer rotating shaft. The inner rotating shaft is sleeved with the outer rotating shaft and connected with the outer rotating shaft through inner shaft bearings. A planetary transmission is arranged between the inner rotating shaft and the outer rotating shaft and comprises a sun gear, planetary gears and a gear ring. The sun gear is fixed to the inner rotating shaft in a penetrating manner, the gear ring is arranged at the bottom of the outer rotating shaft, and the planetary gears are engaged with the sun gear and the gear ring. The coaxial bidirectional stirring device is compact in structure; in the use process, the inner rotating shaft is connected with a motor for rotation, and therefore the sun gear of the planetary transmission is driven to rotate, the outer rotating shaft connected with the gear ring is kept rotating at different speeds in the opposite direction, and a stirring tool is driven coaxially in the forward and reverse directions to run at different speeds at the same time; sufficient stirring is achieved, and efficiency is improved; and the inner shaft bearings are arranged between the inner rotating shaft and the outer rotating shaft, so that rotating friction is lowered, the service life of a part is prolonged, and the device is suitable for large-scale promotion.

The invention relates to rotating chair entertainment equipment. The rotating chair comprises a rotating device which can rotate around the center of a rotating shaft, a guide pole fixedly installed at the rotating device and in parallel arranged with the center of the rotating shaft, and a chair arranged at the guide pole through a self-rotation device. The chair can rotate around the guide pole; when rotating with the entire entertainment equipment, the rotation chair entertainment equipment of the invention can not only conduct the lifting motions along the guide pole, each chair of the equipment can self-rotate around the guide pole by taking respective guide pole as an axle center. The rotation chair entertainment equipment of the invention has better entertainment performance and interest.

The invention provides a three-directional movement decoupling periodic structure for a vibrating table model box. The periodic structure is formed by sequentially overlapping n periodic structure units, each periodic structure unit is formed by sequentially overlapping a first side limiting layer, a plane decoupling layer, a second side limiting layer and an elastic layer, n is a positive integerlarger than or equal to 2, the section shapes of the first side limiting layer, the plane decoupling layer, the second side limiting layer and the elastic layer are the same, and the periodic structure is used for three-directional movement decoupling under seismic oscillation conditions. The invention further provides a three-directional movement decoupling model box for vibrating table tests. The model box is composed of the periodic structure, a model box bottom plate and a limiting protection door type frame through combination. The model box is light in weight, high in strength and suitable for super gravity and normal gravity vibration table tests; it is ensured through multiple measures that the movements of the model box and a test soil body are synchronous, the movements in the X-direction, the Y-direction and the Z-direction between the model box and the test soil body do not interfere with one another, no additional acting force is generated by the model box on the test soil body and a boundary effect is avoided as much as possible; three-directional movement decoupling can be well realized, and prototype site characteristics are restored.

The invention discloses a motor rotating shaft protection device. The device comprises an installation pedestal, and the top of the installation pedestal is fixedly provided with a motor body througha bolt. The motor body is rotationally connected with a rotating shaft body, and one end, close to the motor body, of the rotating shaft body is fixedly provided with a first gear. A bottom plate is fixed at the top end of the installation pedestal through a bolt. A sleeve is welded on the bottom plate, and four clamping plates which are uniformly distributed are connected in the sleeve in a sliding manner. The sleeve is disposed on the rotating shaft body in a sleeving mode through four clamping plates, and first springs are evenly distributed on side walls, away from the rotating shaft body,of the clamping plates, wherein the other ends of the first springs are connected to the inner wall of the sleeve, and a plurality of evenly-distributed rotating rods are rotationally connected to the side wall of the end, close to the motor body, of the sleeve. The device is simple in structure and novel in design, can effectively reduce rotation friction of the motor rotating shaft, prolongs the service life, has a heat dissipation function, can protect the motor, and is high in practicability.