7results about How to "Small span" patented technology

The invention provides a pump body assembly, a fluid machine and heat exchange equipment. The pump body assembly comprises a first air cylinder and a second air cylinder, and a partition plate is arranged between the first air cylinder and the second air cylinder. The volume of the third air cylinder is smaller than that of the first air cylinder and that of the second air cylinder. The first air cylinder and the second air cylinder are located between the first flange and the second flange; the third air cylinder is located between the second flange and the first cover plate; and the second cover plate is located between the second flange and the third air cylinder, and a first exhaust cavity of the second air cylinder is formed between the second cover plate and the second flange. The problem that in the prior art, miniaturization design of an air cylinder in fluid machinery is limited is solved.

The invention provides a pump body assembly, a fluid machine and heat exchange equipment. The pump body assembly comprises a plurality of first air cylinders, a plurality of second air cylinders and a plurality of second air cylinders, the volume of the second air cylinders is smaller than that of the first air cylinders, and the first air cylinders and the second air cylinders are sequentially arranged in the axial direction; the multiple first air cylinders are located between the first flange and the second flange; the flange cover plate is located on the side, away from the first flange, of the second flange and located between the second flange and the second air cylinder. The pump body assembly is provided with a first lubricating oil way and a second lubricating oil way which are used for at least conducting lubricating heat dissipation on the first air cylinder and the second air cylinder correspondingly. The problem that in the prior art, miniaturization design of an air cylinder in fluid machinery is limited is solved.

The utility model relates to a kind of double-motor driving device for golf bag car.The double-motor driving device for golf bag car includes drive motor, reduction assembly and shell, the shell includes the main part fixed with drive motor and the extension part located at the both sides of main part, the reduction assembly includes worm gear structure and worm structure in main part, the worm structure is located at drive motor output end, the both ends of worm gear structure are provided with first shaft part and second shaft part respectively, the first shaft part and second shaft part are rotatably fixed with shell by first bearing, the extension part in both sides is rotatably fixed with a linkage shaft by two second bearings respectively, the end of first shaft part extends into extension part and is linked with the inner end of output end by coupling, one second bearing is located at the outer end of extension part, and the other second bearing is adjacent to the coupling.The utility model has the advantages of lower production requirements, easy assembly and higher stability during use.

The utility model discloses a high-efficiency stable permanent magnet synchronous motor wiring board assembly structure, and particularly relates to the technical field of permanent magnet synchronous motors, which comprises a wiring board plastic part, and a central point wiring board I and a central point wiring board II are arranged in the wiring board plastic part. A first U-phase wiring board, a first V-phase wiring board, a first W-phase wiring board, a second U-phase wiring board, a second V-phase wiring board and a second W-phase wiring board are further arranged in the wiring board plastic part. According to the high-efficiency stable permanent magnet synchronous motor wiring board assembly structure provided by the utility model, the design of integral molding of the wiring board plastic part is adopted, the operation of the device is facilitated, and meanwhile, the wiring boards and the wiring board plastic part are subjected to integral injection molding, so that the distance among a plurality of wiring boards is increased during the wiring design of the motor, and the reliability of the device is improved. Interference among parts is avoided, complexity of wire winding and terminal welding in technology is reduced, and production efficiency is improved.

The utility model discloses a double-cantilever film pressing device which comprises an installation column and a wire pressing cantilever, the installation column is vertically installed in a cleaning tank, the wire pressing cantilever is installed on the installation column through a lifting mechanism in an up-and-down sliding mode, the wire pressing cantilever comprises a cantilever, a wire pressing wheel and a comb tooth structure, the middle of the cantilever is installed on the installation column in an up-and-down sliding mode, and the middle of the cantilever is connected with the wire pressing wheel in an up-and-down sliding mode. The wire pressing wheels are arranged at the lower ends of the left side and the right side of the cantilever, tows penetrate through the wire pressing wheels from the two sides of the cantilever to be pressed downwards and tensioned, the comb tooth structure is arranged on the side, entering the wire pressing wheels, of the tows, and the cantilever wire pressing device is installed in the water tank, so that the overall height of the cleaning equipment can be reduced; the equipment does not need to dig a pit for sinking in a plant, the requirement for the plant is low, filament pressing is achieved on the two sides from the middle portion, after a filament bundle is broken, an operator can pull the filament bundle again from the two sides only by lifting a cantilever, the operation span is reduced, and traction is easier.

The utility model provides a kind of high-speed permanent magnet motor belongs to motor design technical field, include: motor shell, inside installation stator assembly, stator winding, rotor assembly, motor rotating shaft and bearing, stator assembly, stator assembly is composed of stator core and stator slot, and stator winding is embedded in the groove bottom position of stator slot.The utility model design structure is reasonable and compact, and the structure of long-tooth stator core and stator slot cooperate groove bottom arrangement stator winding releases radial space, so that bearing is embedded installation, shortens bearing span, improves critical speed and mechanical stability;Axial heat dissipation flow passage design realizes directional cooling while optimizing electromagnetic efficiency, solves permanent magnet demagnetization risk;Solid permanent magnet small shaft diameter embedded structure ensures the strength of rotor at the same time, effectively reduces centrifugal load and wind abrasion loss, improves high-speed operation reliability;Make the high power density of motor and ultrahigh speed in compact space obtain synergistic breakthrough.

The invention relates to the technical field of composite material forming, in particular to a composite material refrigerated container floor assembly and a forming method and system thereof.The floor assembly comprises a bearing plate, a first reinforcing rib and a second reinforcing rib, and the first reinforcing rib and the second reinforcing rib are arranged on the same side of the bearing plate and extend in the length direction; the multiple first reinforcing ribs are arranged in the width direction of the bearing plate, the first reinforcing ribs and the bearing plate are integrally formed through the pultrusion technology, and at least one second reinforcing rib is arranged between every two adjacent first reinforcing ribs; the multiple bearing plates are arranged side by side in the width direction, and the second reinforcing ribs adhere to the adjacent bearing plates in a bridging mode through adhesives. The bearing plate is a flat plate, the first reinforcing rib is a T-shaped beam, and the second reinforcing rib is an I-shaped beam; the bearing plates and the T-shaped beams comprise outer layers and middle filling layers, the outer layers are four-axial-direction warp knitting fabrics covered with surfacing felts, and the middle filling layers are UD yarns arranged in the length direction. During forming, an on-line hot-pressing device is matched in the traction process to conduct hot-pressing fitting on the outline of the T-shaped beam, and residual stress is released for shaping.