5results about How to "Appropriate speed" patented technology

The utility model relates to the technical field of machining, and particularly discloses a handheld servo electric screwdriver which comprises an electric screwdriver cap, a servo motor, an electric screwdriver handheld portion and an electric screwdriver chuck portion which are sequentially arranged from top to bottom, and the electric screwdriver cap is provided with an aviation plug, a start-stop photoelectric control panel, a start-stop switch and a forward and reverse rotation switch. The aviation plug, the servo motor, the start-stop switch and the forward and reverse rotation switch are all electrically connected with the start-stop photoelectric control panel, the servo motor is in transmission connection with an electric screwdriver chuck main shaft through a transmission shaft, and an electric screwdriver chuck push-pull sleeve is arranged at the bottom of the electric screwdriver chuck part. The bottom of the electric screwdriver chuck main shaft is located on the inner side of the electric screwdriver chuck push-pull sleeve. The start-stop switch and the forward and reverse rotation switch are arranged to control start-stop and forward and reverse rotation of the servo motor, the servo motor drives the electric screwdriver chuck main shaft to rotate to output torsion, the torque is large, the rotating speed is moderate, heating is small, mechanical abrasion is avoided, and therefore the service life is long, and the failure rate is low.

The utility model relates to a static contact structure of a medium-voltage ring main unit circuit breaker, which comprises a base and a static contact plate which are integrally formed, the base is of a cuboid structure, a screw mounting hole used for connecting a static end of the circuit breaker is arranged on the base, the base is arranged at the lower part of the static contact plate, and a groove for accommodating the static contact plate is arranged on the side wall of the base. A groove is formed in the base, the static contact plate is arranged in the groove, the end faces of the two sides of the static contact plate are two vertically-arranged contact planes, the contact planes are trapezoidal, the side, close to the base, of each contact plane is provided with a contact edge arc-shaped chamfer, and the contact edge arc-shaped chamfers of the two contact planes are matched to form a transition guide part facilitating contact between the moving contact and the contact planes; the static contact structure ensures enough contact area with the moving contact, reduces contact resistance, reduces heating, improves conductivity and breaking capacity, ensures proper contact pressure between the static contact structure and the moving contact, enables the static contact structure and the moving contact to be tightly contacted, prevents poor contact, and is easy to disassemble and replace.

A vehicle drive device is provided that can suppress the increase in dimension in the radial direction while ensuring a sufficient speed reduction ratio. Two driving force sources (1A, 1B) are arranged on a first axis (X1), two output members (2A, 2B) are arranged on a second axis (X2), two counter gear mechanisms (5A, 5B) are arranged on a third axis (X3). A planetary gear mechanism (6) is configured to transmit rotation from the two counter gear mechanisms (5A, 5B) to the output members (2A, 2B), and is disposed so as to overlap with both of the two counter gear mechanisms (5A, 5B) as seen in an axial direction along and axial direction (L).

The application relates to the technical field of vehicles, in particular to a following vehicle reminding method and device, a vehicle and a medium, wherein the following vehicle reminding method comprises the following steps: acquiring sensing data of a current vehicle; determining whether a followed vehicle exceeds the sensing range of the current vehicle according to the sensing data; if the followed vehicle exceeds the sensing range of the current vehicle, establishing a communication connection between the current vehicle and the followed vehicle, acquiring synchronization information of the followed vehicle; and reminding following based on the synchronization information and the position of the current vehicle. Therefore, the problems that the prior art is limited by the sensor detection range, is only applicable to short-term reminding and control in the starting stage or low-speed driving, and lacks comprehensiveness and intelligence are solved.

The invention discloses a method and device for regulating and controlling the performance of a laser cladding wear-resistant coating containing multiple strengthening phases, and belongs to the technical field of laser cladding. The regulation and control method comprises the steps that the corresponding relation between the rotating speed and the powder feeding amount of each powder feeding unit is obtained, and the rotating speed of the powder feeding unit corresponding to each strengthening phase powder particle is regulated based on the preset powder feeding amount of each strengthening phase powder particle in the wear-resistant coating; the powder feeding gas flow is adjusted based on the density, the decomposability and the powder structure of each strengthening phase powder particle; the strengthening phase powder particles enter a powder feeding nozzle through a plurality of powder feeding units at the corresponding powder feeding air flow and are mixed at the outlet focus of the powder feeding nozzle; and the uniformly mixed strengthening phase powder particles are subjected to laser cladding, and the wear-resistant coating is prepared. According to the method and the device, the powder feeding gas flow of different types of powder is precisely regulated and controlled in a targeted manner, so that regulation and control of the structure and the performance of the high-hardness and high-wear-resistance cladding layer containing multiple strengthening phases are realized.