36results about How to "Prevent bottoming out" patented technology

The invention discloses a switching power supply control circuit in a quasi-resonant mode and a control method. An output current sampling circuit is used for obtaining an output current feedback signal for representing output current information; the current sampled output current feedback signal is compared with a plurality of valley switching threshold values; when the output current feedback signal reaches a threshold voltage of a certain valley, a control circuit switches a current locked valley to another proper valley. Meanwhile, with arrangement of a retardation zone a phenomenon that valley jumping occurs when the output current feedback signal of the output current approaches the valley switching threshold value can be prevented. According to the invention, stability of locking of a valley in a quasi-resonant mode is high; and the influence by the input direct-current voltage fluctuation can be eliminated.

The invention discloses a coast-floating trestle which comprises multiple continuously spliced coast-floating bridge sections (1) and an anchoring system (2). Each of the coast-floating bridge sections (1) comprises a coast-floating bridge box (11), supporting frames (12) and elastic material cables (13), wherein the supporting frames (12) are located on two sides of the coast-floating bridge box (11) and above the coast-floating bridge box (11), and the coast-floating bridge box (11) is suspended on the supporting frames (12) through the elastic material cables (13). The coast-floating trestle is strong in carrying capability and good in adaptability and can effectively exist and be used under the condition of moderate sea (wave height is 1.25-2.50 m).

The invention relates to a bilge keel. A body structure of the bilge keel comprises a fixed clamshell structure (2) and a rotary clamshell structure (1) which are in a flat shape after being combined; the head and tail ends are in a streamline shape; the fixed clamshell structure (2) is fixedly connected to a bilge strake (3); the rotary clamshell structure (1) is connected with the fixed clamshell structure (2) through a rotary shaft system; the rotary shaft system is used for opening and closing the rotary clamshell structure (1). The bilge keel can increase the rolling damping of a ship, effectively reduce rolling of the ship and enhance the rolling stability.

A three-tier structure consisting of first, second and third air cells 13, 15 and 17 is formed by stacking up first, second, third and fourth sheets 6, 7, 8 and 9 and sticking them to each other via spots. First adhesion parts 10 sticking the first and second sheets together are arranged at predetermined intervals, and adjacent four first adhesion parts are positioned in the corners of a rectangle. On the other hand, each of second adhesion parts 14 sticking the second and third sheets together is positioned in the center of the rectangle formed of the adjacent four first adhesion parts. The third air cell is constructed in the same way as the first air cell. An air pressure of the third air cell is kept at a high pressure, while air pressures of the first and second air cells are set to be low. A bedsore can be prevented by utilizing the low-pressure air mat preventing.

The invention discloses a damping type anti-bottoming shock absorber and a three-wheeled motorcycle, which include an inner cylinder, an outer cylinder and a shock-absorbing main spring. The anti-bottoming damping part is installed on the inner bottom of the outer cylinder toward the inner cylinder. When the inner cylinder is covered with the anti-bottoming damping part in the downward direction, there is a gap with the anti-bottoming damping part in the transverse direction; The outer cylinder, the inner cylinder is located above the piston and has a lubricating hole, the space in the outer cylinder opposite to the downward movement of the piston is filled with oil, and this space is connected to the inner cylinder; the shock absorber of the present invention is arranged at the bottom of the outer cylinder The anti-bottoming damping part, in the process of the inner cylinder going down and covering the anti-bottoming damping part, the hydraulic oil in the outer cylinder can only enter the inner cylinder through the gap, so as to form an effective compression damping force, which can effectively prevent bottoming out, At the same time, the hydraulic oil flows to the top of the piston through the lubricating hole under pressure, which is beneficial to the lubrication of the piston and improves the stress concentration of the piston.

The invention discloses a comfortable damping anti-bottoming shock absorber and a three-wheeled motorcycle, which include an inner cylinder, an outer cylinder and a main shock-absorbing spring. The main damping spring is a sudden change pitch spring composed of a long pitch section and a short pitch section, and also includes an anti-bottoming damping member installed on the inner bottom of the outer cylinder facing the inner cylinder, and the inner cylinder goes down and is covered with an anti-bottoming When the damper is used, there is a gap in the lateral direction with the anti-bottoming damper; the inner cylinder is sleeved on the outer cylinder through the piston, and the inner cylinder is located above the piston. It is filled with oil, and the space is connected to the inner cylinder; the present invention adopts abrupt pitch springs and anti-bottoming damping parts, and the damping force formed by the anti-bottoming damping parts works together with the sudden pitch springs to avoid When driving, the shock absorber bottoms out, improving driving comfort and ensuring controllability.

The invention relates to a control method for a clam-shaped bilge keel. A main body structure of the lam-shaped bilge keel comprises two parts of a fixed clamshell structure (2) and a rotary clamshell structure (1), wherein the rotary clamshell structure (1) is connected with the fixed clamshell structure (2) through a rotating shaft system. The control method comprises the following steps of monitoring a rolling angle, an angular velocity and an angular acceleration of a ship during ship navigation; obtaining ship draft information; checking ship stability variation; if any one of the three parameters of the rolling angle, the angular velocity and the angular acceleration continuously exceeds a corresponding safety threshold upper limit within a set time, driving the rotating shaft system by using a motor so as to unfold the rotary clamshell structure of the bilge keel; and if the three parameters of the rolling angle, the angular velocity and the angular acceleration are all continuously lower than corresponding safety threshold lower limits within a set time, driving the rotating shaft system by using the motor so as to fold the rotary clamshell structure of the bilge keel. According to the invention, the opening and closing of the bilge keel can be intelligently controlled.

The invention relates to an external-opened retractable bilge keel. A main body structure comprises two parts of a fixed shell structure (2) and a rotary shell structure (1), wherein after being closed, the two parts are in a flat shape; front and tail ends of the main body structure is shaped like a streamline; the fixed shell structure (2) is fixedly connected with a bilge strake (3); the rotary shell structure (1) is connected with the fixed shell structure (2) through a rotating shaft system; and the rotating shaft system is used for opening and closing the shell structure (1). The external-opened retractable bilge keel provided by the invention is advantaged in that the rolling damping of a ship can be increased, the rolling of the ship is effectively reduced and the rolling stability is enhanced.

The invention discloses a shock-absorbing piston assembly, which comprises a piston body, a sliding sleeve and an elastic member. The piston body has a damping channel for communicating with the upper and lower chambers of an outer cylinder. The bottom of the damping channel has several sets arranged axially. And it is used to communicate with the lower liquid hole of the lower chamber of the outer cylinder. The sliding sleeve can slide up and down on the piston body. The elastic member provides the elastic force for the sliding sleeve to limit its upward sliding. The piston assembly is inside the outer cylinder When going down, the sliding sleeve is driven by the damping fluid in the lower chamber of the outer cylinder to move upward relative to the piston body and close the lower liquid passage holes one by one from bottom to top; the shock-absorbing piston assembly of the present invention can adaptively change the shock-absorbing force in the shock absorber according to the road conditions. Damping, better adaptability to road conditions, the damping force gradually increases during the shock absorbing process, and the damping force changes more smoothly, which improves the shock absorbing effect and ride comfort. The piston assembly can effectively prevent the piston assembly in bumpy road conditions. Bottom inside the outer barrel.

The invention discloses an automobile shock absorber, which comprises a sliding column, an outer cylinder, a piston assembly and a shock absorbing main spring. The piston assembly includes a piston body, a sliding sleeve and an elastic member. The piston body is connected to the sliding column. There is a damping channel connected to the upper and lower chambers of the outer cylinder. The bottom of the damping channel has several sets of lower liquid holes arranged in the axial direction and connected to the lower chamber of the outer cylinder. The sliding sleeve can be slid up and down on the piston body. , the sliding sleeve is driven by the damping fluid in the lower chamber of the outer cylinder to move upward relative to the piston body and close the lower liquid passage holes one by one from bottom to top; the shock absorber of the present invention can adaptively change the shock absorption and damping according to the road conditions, and is more adaptable to road conditions Well, the damping force gradually increases during the shock absorption process, and the damping force changes more smoothly, which improves the shock absorption effect and ride comfort. The shock absorber can effectively prevent the piston assembly from bottoming out in relatively bumpy road conditions.

The invention provides intelligent furniture convenient to assemble and disassemble. The furniture comprises a wardrobe, a hanging rod is arranged in the wardrobe, the hanging rod is of a hollow structure, sprocket wheels are fixedly mounted on two sides of the inside of the hanging rod, one of the sprocket wheels is provided with a power device, the two sprocket wheels are connected through a chain plate, a strip-shaped through groove is formed in the top face of the hanging rod, the top face of the chain plate is fixedly connected with the lower ends of a plurality of stirring rods, the stirring rods pass through the strip-shaped through groove, an inverted-C-shaped plate is arranged above the hanging rod, the bottom surface of the inverted-C-shaped plate is fixedly connected with the top face of the hanging rod, the stirring rods are positioned in the inverted-C-shaped plate, a plurality of strip-shaped grooves are formed in the top face of the inverted-C-shaped plate, one ends of the strip-shaped grooves are fixedly connected with one ends of electric push rods, the other ends of the electric push rods are fixedly connected with one sides of sliders, and the sliders are positioned in the corresponding strip-shaped grooves and can slide along the strip-shaped grooves. The intelligent furniture is suitable for use by multiple people, the users can adjust the chain plate for driving the stirring rods to move, so that the space inside the wardrobe is distributed, the intelligent furniture is particularly suitable for use by the female, the manual pressing for clothes is notneeded, and thus the physical power of the users is saved.