8results about How to "Achieve continuous change" patented technology

The invention provides a continuous pressure regulation optimization method of an emergency throttle valve and the emergency throttle valve. The method comprises the following steps: S1, establishing an optimization target; s2, setting initial parameters; s3, performing opening degree simulation on the conical valve head; s4, selecting an angle value of a cone angle of the valve head, and performing opening degree simulation on the piecewise function type valve head; s5, adjusting an angle value of a cone angle of the valve head, and performing opening degree simulation of throttling ports at different displacement positions of a valve core on the piecewise function type valve head; and S6, adjusting the outlet aperture of the outlet channel to carry out openness simulation, and determining the outlet aperture value of the outlet channel. According to the invention, continuous pressure regulation and pollution resistance of the emergency throttle valve under the condition of constant flow are taken as improvement targets, the structure of the cone angle of the valve core and the valve head is improved, and a logarithmic function form is adopted, so that the drainage basin of the emergency throttle valve is streamlined, and pollution particles in oil can easily flow out of the emergency throttle valve along with hydraulic oil; pollution particles are prevented from being retained in the valve, the cone angle of the valve head is variable, and then continuous change of pressure is achieved.

The utility model relates to a lying massage chair frame which comprises a base frame, a cushion frame, a backrest frame, a leg and foot frame and an electric push rod. The backrest frame is arranged at the rear part of the cushion frame, the backrest frame and the cushion frame are movably arranged on the base frame, and the cushion frame and the backrest frame are driven by the electric push rod to swing; wherein a first linkage mechanism is arranged between the front end of the backrest frame and the front end of the cushion frame, a second linkage mechanism is arranged between the front end of the leg and foot frame and the front end of the cushion frame, the electric push rod is hinged between the front end of the base frame and the front end of the cushion frame, and the angle of the backrest frame and the angle of the cushion frame are adjusted through the first linkage mechanism. And the angle of the cushion frame is changed along with the change of the leg and foot frame driven by the second linkage mechanism. According to the utility model, the electric push rod is matched with the two linkage mechanisms, so that the backrest frame and the leg and foot frame are correspondingly linked for adjustment; the chair has the characteristics of unique conception, simple structure, no forward sitting posture and horizontal lying posture, and has the effects of relaxation and sleep promotion.

This invention discloses a continuously variable transmission (CVT), specifically relating to the field of transmission technology. It includes a housing with an adjustment component on it. The adjustment component includes a connecting cover at one end of the housing, and an angle-adjustable ball joint hinged within the connecting cover. A first shift lever is located at the bottom of the ball joint. Through angle adjustment of the ball joint, and the linkage between a slider and a concave block, the first and second shift levers slide laterally, allowing for real-time fine-tuning of the meshing depth between the first and second connecting wheels and the linkage gear. This dual adjustment structure works synergistically, breaking the limitations of traditional segmented speed regulation. It enables seamless switching of the transmission ratio within a preset range. Furthermore, the high-precision angle control of the servo motor combined with the micron-level displacement adjustment of the ball joint ensures that the transmission ratio meets the corresponding control requirements, satisfying the needs of high-precision speed regulation scenarios.

The invention provides a width adjusting assembly for a handle and a walking aid, the width adjusting assembly comprises a motor, a first gear mechanism, two worm and gear mechanisms and two second gear mechanisms, the first gear mechanism is connected with the motor, and the left-right width of the first gear mechanism is adjustable; the two handles are respectively connected with one second gear mechanism; and the worm and gear mechanism is used for connecting the first gear mechanism and the second gear mechanism. According to the width adjusting assembly for the handle, the width can be continuously changed; and during use, self-locking can be realized.

The present application discloses a water supply device and an oral cleaning device, which relate to the field of oral cleaning technology. The water supply device includes a water tank, a receiving cavity is formed in the water tank, and the water tank includes a spiral telescopic mechanism, and the spiral telescopic mechanism includes a contracted state and an extended state; when switching between the contracted state and the extended state, the spiral telescopic mechanism is used to adjust the volume of the receiving cavity to change continuously. The water supply device and oral cleaning device provided by the present application can realize multiple switching of the volume size of the receiving cavity in the water tank to meet the diverse needs of users.

Aiming at the problem of attitude control of SAR satellite sliding beam mode, the present invention proposes a polynomial-based attitude control method for SAR satellite sliding beam mode. The method comprises: obtaining the projection of the three-axis pointing unit vector expected by the satellite at each discrete time point during the imaging of the sliding beam mode in the earth-fixed coordinate system according to the observation scene and satellite orbit information; converting the three-axis pointing expected by the satellite at each discrete time point during the imaging into the satellite Euler angle; fitting the satellite Euler angle at each discrete time point into a polynomial curve as the sliding beam imaging attitude curve by the least square fitting method; obtaining the attitude angular velocity curve, angular acceleration curve and angular acceleration curve according to the sliding beam imaging attitude curve, and then calculating the satellite attitude angle, angular velocity and angular acceleration at the start and end of imaging; thereby constructing the pre-imaging preset attitude curve and the post-imaging attitude return curve, and using the tracking control algorithm to realize the attitude control of the satellite over the whole process of the sliding beam mode.

The utility model belongs to the technical field of optical lenses, and particularly relates to an infrared continuous zoom lens with a large zoom ratio, which comprises a front fixing group, a zoom lens group, a compensating lens group, a middle fixing group, a focusing lens group, a reflecting lens group and a rear fixing group. The linear bearings and the guide optical shafts are adopted, the movement performance is good, the whole machine layout is very compact, and the whole machine size is relatively small.

The invention relates to a guide beam structure with a variable rotating angle and a movable formwork, the guide beam structure is arranged between a main beam (1) and a front auxiliary supporting leg (2), and the guide beam structure comprises a plurality of sections of repeating units which are connected in sequence; each repeating unit is of a frame structure and comprises four I-shaped beams which are arranged up and down and serve as axial stress components. Wherein the repeating unit connected with the main beam is a rotatable unit (3); in the rotatable unit, a first I-shaped beam (31) and a second I-shaped beam (32) on one side in the length direction of the guide beam structure are cut off from the middle, and the cut-off positions on the two sides are connected through a telescopic hydraulic rod (35); the third I-shaped beam (33) and the fourth I-shaped beam (34) on the other side in the length direction of the guide beam structure are cut off from the middle, and the cut-off positions on the two sides are connected in a hinged mode. Compared with the prior art, the continuous change of the corner of the guide beam structure meets the construction requirement of a movable formwork for a curved bridge.