47results about How to "Eliminate connection gaps" patented technology

The invention relates to a frame integration type multi-rod guiding continuous zooming device which comprises a frame with two cavities. The frame is a whole. A zooming lens group and a compensation lens group are arranged in the cavities. At least three straight line bearings and a zooming lens base lead screw nut are arranged on a zooming lens base. One end of a zooming lens base lead screw is connected with a zooming driving motor, and the other end of the zooming lens base lead screw is inserted into a zooming encoder. At least three straight line bearings and a compensation lens base lead screw nut are arranged on a compensation lens base. One end of a compensation lens base lead screw is connected with a compensation driving motor, and the other end of the compensation lens base lead screw is inserted into a compensation encoder. The zooming driving motor and the compensation driving motor are fixed on stand walls respectively. The frame integration type multi-rod guiding continuous zooming device has the advantages that whole rigidness is good, accuracy is high, images are stable under vibration conditions, the whole device is high in environment adaptability, multi-rod guiding is used for achieving the coaxality of moving, the structure technology is good, machining is easy, adjustment accuracy is improved, and the optical axis consistence during guiding lens moving is guaranteed.

The invention provides a locking connecting device, an LED (Light Emitting Diode) screen box and an LED display screen. The locking connecting device comprises a lock hook component and a rod pin component, wherein the lock hook component comprises a lock hook base; a lock hook and a handle are arranged on the lock hook base; a gear is arranged in the handle; a plug is arranged on the lock hook base and is connected with the gear; the rod pin component comprises a rod pin base; a rod pin is arranged on the rod pin base; a fixing pin hole is arranged on the rod pin base; the lock hook component and the rod pin component are connected with the fixing pin hole through the lock hook, the rod pin and the plug which are matched with each other; the LED screen box comprises an LED box shell with an LED display component; the lock hook component and the rod pin component are respectively arranged on two opposite lateral edges of the LED box shell; and the LED display screen is formed by connecting adjacent LED screen boxes through the locking connecting device. The locking connecting device provided by the invention has the advantages of higher bearing capacity, compact and accurate connection, convenience in operation and reliable property.

The invention relates to a connecting structure of a constant velocity universal joint and a wheel hub and an automobile. The connecting structure comprises the wheel hub, a steering knuckle, the constant velocity universal joint, bearings, bearing bolts, locking nuts and a self-locking nut, wherein a central inner cavity of the wheel hub extends from a wheel to the direction of the locking nuts, the central inner cavity sequentially comprises a first cylindrical inner cavity, a second cylindrical inner cavity, a third cylindrical inner cavity and a fourth cylindrical inner cavity; radii of the second cylindrical inner cavity and the fourth cylindrical inner cavity are identical and are respectively greater than the radius of the third cylindrical inner cavity; a plurality of sharp toothed protrusions are axially arranged on the side surface of the outer end of the constant velocity universal joint; the distance between tips of the sharp toothed protrusions and a central line of the outer end of the constant velocity universal joint is greater than the radius of the third cylindrical inner cavity; the hardness of the outer end of the constant velocity universal joint is greater than that of the wheel hub. According to the technical scheme, by means of a crimping structure of the outer end of the constant velocity universal joint and the inner cavity of the wheel hub, a connecting clearance between the wheel hub and the constant velocity universal joint is completely eliminated, the fluctuation of a transmission torque is eliminated, and transmission vibration and wheel vibration are reduced.

The invention discloses an electromagnetic performer, comprising a shell (100) provided with an inner cavity, a back end cover (600) which is matched with an assembly hole (121) on a back end surface (120) of the shell (100), and a ratio electromagnet (200) and a transmission rod (400) which are mounted inside the shell (100), wherein an output shaft (201) of the ratio electromagnet (200) is connected with a swing arm device (300) in a contact way; the swing arm device (300) is movably connected with the transmission rod (400); and a spring (500) is arranged between a rod body of the transmission rod (400) and a front end surface (110) of the shell (100). The electromagnetic performer provided by the invention is simple in structure and good in sealing property and is capable of removing transmission gaps.

The invention discloses a universal rolling mill and a rolling mill vertical roll device with adjustable vertical roll rotation axis angles. The rolling mill vertical roll device with the adjustable vertical roll rotation axis angles comprises a vertical roll, an internal case with a first internal surface and a first external surface, an external case with a second internal surface and a second external surface, a hydraulic cylinder with a cylinder bottom and a piston rod and a pair of half shafts; the universal rolling mill comprises two horizontal rollers and two rolling mill vertical roll devices; the rolling mill vertical roll devices are the above rolling mill vertical roll devices with the adjustable vertical roll rotation axis angles. According to the technical scheme of the universal rolling mill and the rolling mill vertical roll device with the adjustable vertical roll rotation axis angles, inclined rotation axis angles of the vertical roll is rapidly and effectively corrected, the efficiency is high, and the cost is low.

The invention discloses a helmet hook suspension device, and belongs to the technical field of illumination. The helmet hook suspension device comprises a miner helmet suspension part and a miner lamp connecting part, the miner helmet suspension part is arranged on the miner helmet, the miner lamp connecting part is arranged on the miner lamp, and the miner lamp connecting part is clamped on the miner helmet suspension part; and at least one of the miner helmet suspension part and the miner lamp connecting part is provided with an elastic fixing piece, and the elastic fixing piece is used for elastically and fixedly connecting the miner lamp connecting part and the miner helmet suspension part. The helmet hook suspension device prevents the miner lamp from inclining when suspended on the miner helmet to a certain extent, is good in stability, and ensures the effectiveness and the lighting effect of lamp cap suspension and normal mine operation.

The invention relates to a telescopic steel bar connection kit, the main body of which includes a two-way screw sleeve, a forward screw seat, a reverse screw seat, a screw joint, a one-way screw sleeve and a pin shaft; one end of the two-way screw sleeve The inner thread of the thread is consistent with the inner thread of the one-way thread sleeve, and the outer thread of the forward screw seat, screw joint and steel head pier is consistent; each part in the kit can be organically combined, such as adding or subtracting Parts, for the butt connection of two steel bar heads with different spacing, and provide a kit for the connection of steel bar heads at the construction site. The combination method is flexible. According to the requirements of the steel bar spacing, it can reduce the number of parts to form a short-distance connection, and can also increase the number of parts in series to meet the needs of long-distance connections. With the help of two-way threaded sleeves, it can achieve tension and eliminate connection gaps; the connection is reliable, no The amount of deformation can meet the stress design requirements, and it is suitable for the connection of two steel bar heads with dislocation and different angles, which greatly facilitates the construction of steel bar connection.

The invention discloses a vertical five-shaft linkage machine tool. The vertical five-shaft linkage machine tool comprises an overhanging-eave-type portal frame, a swing input motor (21), a swing speed reducer (22), a motorized spindle clamping head (9) and a motorized spindle (8), wherein the swing speed reducer (22) is arranged in a ram (7) and is in bolted connection with the ram (7), the swing input motor (21) is connected with the swing speed reducer (22) through a coupling, the swing speed reducer (22) is of a worm and gear structure, a worm-wheel shaft is a hollow output shaft (24), a worm is connected with the swing input motor (21) through a coupling, the rear end of the motorized spindle clamping head (9) is connected with the worm-wheel hollow output shaft (24) through an expansion sleeve (23), and the front end of the motorized spindle clamping head (9) is installed on the ram (7) through a bearing. The rigidity of the machine tool is improved by more than four times when compared with that of a traditional series machine tool, a connection gap between the swing input motor and the motorized spindle is avoided, swing precision is improved, rolled steel can be efficiently machined at the speed of 10000 turn / min, and the overall performance, including the rigidity, precision and machining speed, of the machine tool is substantially improved when compared with that of existing domestic and overseas machine tools.

The invention discloses a fastening connection fitting for a pipe with a pre-punched hole, which includes a joint and a top wire. The part outside the pre-punched hole is tightly connected with the ordinary pipe by tightening the top screw, and drives the clip to expand and fasten the pre-punched hole. The utility model has the advantages of simple structure, convenient installation, elimination of installation gap and improvement of connection strength.