46results about How to "Protect the mechanical structure" patented technology

The invention provides a speed control method and device for an electric tail gate. The speed control method for the tail gate is applied to the electric tail gate in a manual operation process and includes the following steps: S1, judging whether a first control variable of the electric tail gate is larger than a manual operation threshold value or not, S2, conducting brake control on the electric tail gate if the first control variable of the electric tail gate is larger than the manual operation threshold value to ensure that the control variable of the electric tail gate is not larger than the manual operation threshold value in the manual operation process and a mechanical supporting structure is not damaged, S3, making brake measures instantly in a manually opened state when the electric tail gate is close to an extreme position, S4, reducing the speed of the electric tail gate to zero to protect the mechanical structure of the electric tail gate, S5, judging whether the control variable of the electric tail gate is larger than a manual-lock brake threshold value or not when the electric tail gate is in a manual-lock state, and S6, conducting brake control if the control variable of the electric tail gate is larger than the manual-lock brake threshold value to prevent the electric tail gate from smashing into a gate lock and damaging the mechanical structure. According to the speed control method for the electric tail gate, the speed of the electric tail gate is guaranteed to be stable and a user can use the electric tail gate safely when the user opens or closes the electric tail gate manually too fast.

The invention relates to a handle (1) for a cleaning device (2), which comprises at least one telescope part (4) which is lengthwise variable in the longitudinal direction (3) of the handle (1) and at least one part (5, 6) which is stationary in the longitudinal direction (3) of the handle (1), whereby the telescope part (4) and the stationary part (5, 6) are linked with each other in such a manner that they can be detached without sustaining any damage.

The invention discloses a locking structure in which a sliding sleeve of a main shaft of a centering machine cooperates with a claw, comprising a main shaft; an ejector rod arranged in the rear end of the first central hole of the main shaft; , the jacket has a second central hole along the axial direction, a collet is arranged at the front end of the second central hole, and a pressure spring is arranged at the rear end of the second central hole; a jacket nut is arranged at the front end of the main shaft; a sliding sleeve is set at the rear end of the main shaft ;Symmetric claw seat with upper and lower two through grooves; front end is set on the push ring at the end of the ejector rod; "L" shaped claw, the front and rear ends of the claw are respectively free end and transmission end, the claw The rotation is arranged in the through groove, the free end is attached to the outer surface of the sliding sleeve, and the transmission end is located at the rear end of the push ring to push the push ring to move axially. The beneficial effects of the invention are: the whole structure has better rigidity and is not easily deformed, and the invention also has the advantage of simple structure.

The invention discloses a hydraulic mold of a speed changing box. A main oil pressure pipeline is connected with the oil inlets of four electromagnetic valves, a first mechanical valve and a second mechanical valve; the oil outlet of a first proportional valve is connected with the left-side oil inlet and the spring opposite side of a third mechanical valve; the oil outlet of a second proportional valve is connected with the right-side oil inlet and the spring opposite side of a fourth mechanical valve; the oil outlet of a first switching valve is connected with the spring side of the first mechanical valve; the oil outlet of a second switching valve is connected with the spring side of the second mechanical valve; the oil outlet of the first mechanical valve is connected with the right-side oil inlet and the spring side of the third mechanical valve; the oil outlet of the second mechanical valve is connected with the oil outlet and the spring side of the fourth mechanical valve; the oil outlet of the third mechanical valve is connected with the other clutch and the spring opposite side of the second mechanical valve; the oil outlet of the fourth mechanical valve is connected with another clutch and the spring opposite side of the first mechanical valve. The hydraulic mold of the speed changing box is capable of the case of dual locking of the shaft system of the two clutches, and meanwhile, does not intervene with independent control on the two clutches by use of a TCU within a safety threshold.