43results about How to "Meet replacement needs" patented technology

A gunnery training device making a gunnery target easy to change comprises a housing (8), wherein the internal space of the housing (8) comprises a storage zone (82) with the bottom for containing multiple gunnery target components (88), a display zone (81) for displaying a selected gunnery target on the front side of the upper portion and a gunnery target sliding path zone (83) on the rear side of the upper portion, wherein a sliding drive components (84) extending in the front-back direction is arranged in the gunnery target sliding path zone (83) and used for making the selected gunnery target slide in the front-back direction, each of the multiple gunnery target components (88) comprises a gunnery target installing plate (7), lifting drive screws (51) located on two sides of the gunnery target installing plate (7) and lifting supporting frames (6) driven by the lifting drive screws (51).

The invention provides a building letter box device capable of achieving selectable storage and safe. The device comprises a shell. Internal space of the shell comprises a storage region used for containing multiple letter box assemblies and located at the bottom, an operating region used for installation of selected letter boxes and located on the front side of the upper portion, and a letter box sliding path region located on the rear side of the upper portion. Sliding driving assemblies stretching in the front-and-back direction are arranged in the letter box sliding path region and used for enabling the selected letter boxes to slide in the front-and-back direction, a lighting lamp device is arranged in the operating region and used for lighting the operating region at night or in dark natural light, and the lighting lamp device is an LED light lamp. Each letter box assembly comprises a letter box installing plate, lifting driving screws located on the two sides of the letter box installing plate, and a lifting rack driven by the lifting driving screws.

An air purification device capable of replacing filter screens, comprising a base body (8), wherein the inner space of the base body (8) includes a bottom storage area (82) for accommodating multiple filter screen assemblies (88), an upper The air purification area (81) on the front side for installing the selected filter screen and the filter screen sliding path area (83) on the upper rear side, the filter screen sliding path area (83) is provided with slides extending in the front and rear directions The drive assembly (84) is used to make the selected filter screen slide in the front and back directions; wherein, each of the filter screen assemblies (88) includes a filter screen installation plate (7) and a screen located on the filter screen installation plate (7) The lifting drive screw (51) on both sides and the lifting frame (6) driven by the lifting drive screw (51).

The switching mechanism of the present invention includes: a housing, the housing is a hollow structure with an opening at one end; a base plate, the base plate is arranged at the opening of the housing, the housing and the base plate form the main body of the smart plug-in board, and an object is arranged in the main body of the smart plug-in board space; an interface, the interface is set on the base plate; an electric bolt hole, the electric bolt hole is set on the base plate; a positioning mechanism, the positioning mechanism is set on the base plate. Compared with the prior art, the present invention has the following advantages: due to the complicated mechanical, electrical and thermal connections between the stand-alone module and the satellite, usually the stand-alone module and the satellite platform can only be assembled on the ground, and cannot be directly assembled to the satellite platform through on-orbit plugging and unplugging. on the satellite. The present invention provides a transfer mechanism for on-rail replacement of single-machine modules, which converts the problem of on-rail replacement of stand-alone modules into the replacement problem of the combination of the transfer mechanism and healthy single-machine modules, and avoids the direct on-rail replacement of single-machine modules. Assembly is beneficial to the engineering realization of on-orbit replacement of stand-alone modules.

The invention discloses an air purifying device with a replaceable filter screen and being stable in structure. The air purifying device comprises a substrate (8), wherein the inner space of the substrate (8) comprises a storage area (82) which is located at the bottom part and is used for allowing a plurality of filter screen assemblies (88) to be accommodated, an air purifying area (81) which is located on the upper front side and is used for allowing a selected filter screen to be mounted, and a filter screen sliding path area (83) on the upper rear side; slide driving assemblies (84) extending in a front-rear direction are arranged in the filter screen sliding path area (83), and are used for enabling the selected filter screen to slide in the front-rear direction; and each of the filter screen assemblies (88) comprises a filter screen mounting plate (7), elevating driving screw rods (51) located on the two sides of the filter screen mounting plate (7), and elevator frames (6) driven by the elevating driving screw rods (51).

The invention discloses a large wind tunnel test section replacement method. The purpose is to solve the problem that according to an existing wind tunnel test section transportation mode, travellingmechanisms turn inconveniently or positioning is not accurate during replacement. According to the large wind tunnel test section replacement method, test section transportation vehicles are adopted for conducting test section transportation and replacement, a test section is not provided with travelling mechanisms, and through lifting, 90-degree turning of wheels and freely parallel operation ofthe multiple vehicles of the test section transportation vehicles, turning of the wind tunnel test section is achieved; meanwhile, a V-flat slideway mode is adopted for positioning wind tunnel test stations of the test section, round liquid hydrostatic bearings are arranged on the test section transportation vehicles and are used for reducing transverse friction force when the test section falls into a slideway, and through cooperation of the V-flat slideway, the wind tunnel test section and the round liquid hydrostatic bearings, the wind tunnel test section is precisely positioned. By means of the large wind tunnel test section replacement method, the problems that during wind tunnel test section transportation and replacement, positioning is not accurate, and the travelling mechanisms need to turn can be effectively solved, so that the large wind tunnel test section replacement method has a high application value.

The invention discloses a drawer type switch cabinet. The drawer type switch cabinet comprises a drawer body provided with electronic components; an observation window is formed at the movable front panel of the drawer body; the drawer body is provided with a movable multi-functional board assembly for mounting multi-functional meters and signal lamps; and the movable multi-functional board assembly is hinged to the drawer body. The drawer type switch cabinet of the invention has the advantages of simple structure, convenient operation and flexible movement. The multi-function board of the drawer type switch cabinet can be replaced, and therefore, device installation and maintenance can be facilitated.