99results about How to "No axial movement" patented technology

The invention belongs to the technical field of centering devices for drilled holes and provides a rapid center drilling fixture. The center drilling fixture comprises a base which is divided into a base plate and a vertical plate; a vertical height adjusting groove is formed in the vertical plate; a positioning shaft capable of moving up and down is arranged in the height adjusting groove; the positioning shaft is locked with the height adjusting groove by use of a locking nut; an upper V-shaped block, a middle V-shaped block and a lower V-shaped block are coaxially arranged on the vertical plate; the height adjusting groove is located between the V angles of all the V-shaped blocks, wherein a pressing plate is hinged to the middle V-shaped block and matched with the V angle of the middle V-shaped block to form a workpiece clamping part. According to the rapid center drilling fixture, the pressing plate is turned to rapidly clamp and release shaft parts; the rapid center drilling fixture is greater than a triangular chuck in clamping force; besides, the clamping time of the shaft parts is shortened; the rapid center drilling fixture is suitable for center drilling of a batch of shaft parts.

Disclosed is a mechanism for connecting free flanged pipe ends or tube ends (2, 22). Said mechanism comprises several hingedly interconnected clamp segments (3A, 3B, 3C, 3D) that have a substantially U-shaped cross-section, a clamping lever (4), one end of which is arranged at a free end of a clamp segment (3A), and at least one spring (5). The clamp segments (3A, 3B, 3C, 3D) externally overlap the flanges of the joined pipe ends or tube ends (2, 22) while the free ends of the first and the last clamp segment (3A and 3D) can be locked by means of the clamping lever (4) and the spring (5). In order to reliably prevent the closed mechanism from automatically opening under all circumstances, the clamping lever (4) can be positively connected to the free end of the adjacent clamp segment (3D)and can be locked in the tightened position.

The invention provides an LED (Light-Emitting Diode) energy-saving lamp, which belongs to the technical field of lamps and is used for solving the technical problems of incapability of using heat dissipated by the conventional LED energy-saving lamp, poor energy-saving effect and the like existing in the prior art. The energy-saving lamp comprises a lamp cap, wherein the lamp cap comprises a lamp cap main body and an insulator; soldering tin is fixedly arranged at the outer end of the insulator; a round table is fixedly arranged at the outer end of the lamp cap main body; two LED light sources are fixedly arranged on the round table; a lampshade is sleeved on each LED light source; a slot is formed between the two lampshades; a heat-collecting tube is inserted into the slot; a heat-conducting graphite film is coated on the side wall of the heat-collecting tube; the heat-conducting graphite film is attached to the lampshades; an annular radiating fin is further sleeved on the lamp cap main body; a heat-conducting graphite film is also arranged between the annular radiating fin and the lamp cap main body; an inner cavity is formed in the heat-collecting tube; a heat-conducting cavity communicated with the inner cavity is formed in the annular radiating fin; repellent liquid is filled into the inner cavity and the heat-conducting cavity; and a through hole is formed in the top end of the heat-conducting cavity. The LED energy-saving lamp has a good energy-saving effect.

The invention relates to a horizontal type multilevel vortex pump which comprises a pump body, a rotor part connected with three groups of vortex pump impellers, and two bearing bodies, wherein the two bearing bodies are connected onto two ends of the pump body respectively; the rotor part is rotatably arranged in the pump body in a penetrating manner; two ends of the rotor part are connected with the bearing bodies respectively; a water inlet and a water outlet are formed in the outer sides of the pump body respectively; a water inlet section chamber, a middle section chamber and a water outlet section chamber communicated with each other are sequentially arranged in the middle of the pump body; the three groups of vortex pump impellers are positioned in the water inlet section chamber, the middle section chamber and the water outlet section chamber respectively; the water inlet section chamber is communicated with the water inlet; the water outlet section chamber is communicated with the water outlet; the water inlet section chamber and the middle section chamber are vortex pump type chambers; the vortex pump impellers are provided with corresponding back blades. The horizontal type multilevel vortex pump is not provided with a sealing ring, so that the horizontal type multilevel vortex pump has no sealing operation interval and can avoid the problem that the performance of the pump is declined due to increased operation interval of the pump body and the impellers after abrasion.

The invention provides a trailer arm assembly belonging to the technical field of vehicle dragging devices and solving the problem of poor stability of the existing trailer arm. The trailer arm assembly is characterized by comprising a connecting arm, a supporting arm, a main ball head and an auxiliary ball head, wherein the supporting arm is connected with the connecting arm, and a mounting hole is formed in the supporting arm; the main ball head is provided with a cylindrical extension part inserted to the mounting hole; and the auxiliary ball head is provided with a mounting part which is inserted to the extension part and is in threaded connection with the extension part. The trailer arm assembly has the advantages of simple structure, connection firmness and good stability.

The invention relates to a securing element (1) for securing a component to a securing base, having a shank (2) which has an external thread (6) and an expansion body (7), an expansion element (3) which is arranged in an axially movable manner on the shank (2) and which can be expanded by moving axially on the shank (2) by means of the expansion body (7), and a nut (4) which has an internal thread (15) and which is arranged on the external thread (6) of the shank (2). The application of a torque enables the nut (4) to be rotated on the external thread (6) such that the expansion element (3) is moved against the expansion body (7) by means of the nut (4). According to the invention, in order to simplify the mounting of the securing element (1), the internal thread (15) is designed such that the external thread (6) is released after expansion of the expansion element (3) such that the nut (4) can rotatable substantially without axial movement on the shank (2).