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 fruit-cleaning robot. The fruit-cleaning robot comprises a shell, wherein a cleaning barrel is arranged at the middle position of the upper part of the inner side of the shell; a cleaning post is arranged at the middle position of the inner bottom surface of the cleaning barrel; a plurality of rolling bumps are arranged on the inner bottom surface of the cleaning barrel; the outer bottom surface of the cleaning barrel is connected with a sealing block; the bottom surface of the sealing block is connected with a coupler; the other end of the coupler is connected with an output shaft; the other end of the output shaft is connected with a servo motor; the servo motor is arranged at the middle position of the inner side of the bottom surface of the shell; a storage battery is arranged on one side of the servo motor; the bottom of one side of the storage battery is connected with a power transmitting and charging wire; the other end of the power transmitting and charging wire is connected with a voltage-transformation power-transmitting charger; a frequency changer and a control unit are respectively arranged at the positions, on the two sides of the periphery of the servo motor, on the inner bottom surface of the shell; and an telescopic supporting leg is connected with the position, close to the edge, on the outer bottom surface of the shell. The fruit-cleaning robot can quickly and conveniently clean fruits preliminarily which are picked at the site of a garden, and can complete work on the rugged ground.

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 method of preventing a ship from sinking and grounding when entering and leaving a special restricted waterway, and belongs to the technical field of ship transportation. The method of preventing the ship from sinking and grounding when entering and leaving the special restricted waterway specifically comprises the steps of S1, data collection; S2, data arrangement and classification; S3, data processing, wherein calculation is conducted according to collected data and data obtained by inquiring charts, and the calculation content comprises an average sinking quantity delta H1, an actual underkeel clearance delta H3 and a ship wave amplitude delta H2. According to the method of preventing the ship from sinking and grounding when entering and leaving the special restricted waterway, calculation of the actual underkeel clearance delta H3 and the ship wave amplitude delta H2 is added to an existing method of preventing the ship from sinking and grounding when entering and leaving the special restricted waterway, the calculation of the actual underkeel clearance delta H3 and the ship wave amplitude delta H2 is taken into consideration of factors of ship operation condition when it is judged that whether sinking and grounding will occur on the ship or not when the ship enters and leaves the special restricted waterway, and in this way, the effect of preventing the ship from sinking and grounding when the ship enters and leaves the special restricted waterway can be achieved better.

A telescopic bilge piece system driven by a gear is composed of a bilge piece main body structure and an additionally-arranged plate arranged above a bilge piece main body and capable of stretching and retracting along a sliding rail. The edge of the side, close to a boat body, of the bilge piece main body structure is fixed to an external plate of a bilge part, and the connecting position is provided with a covering plate for reinforcing; and the additionally-arranged plate is located above the bilge piece main body structure and connected with the bilge piece main body structure through a slide way. The slide way is located on the inner surface, making contact with the additionally-arranged plate, of the bilge piece main body structure, a groove is formed in the upper surface of the bilge piece main body structure, and a protrusion is arranged on the lower surface of the additionally-arranged plate. Power driving the additionally-arranged plate to slide is from a gear transmission system. The gear transmission system is composed of the gear, bearings, a transmission shaft and a rotary shaft. A rack is fixed to the lower surface of the additionally-arranged plate and transversely arranged. On the transmission shaft and the rotary shaft, the bearings are reasonably arranged on the necessary positions.

The invention discloses a zero-offset typed front damping combination device, comprising a compression damper and a rehabilitation damper, both of which have asymmetric structures. The zero-offset typed front damping combination device has the advantages of saving the cost and improving comfortableness of cycling.

The invention relates to the technical field of sports equipment and particularly relates to a trampoline supporting frame and a petal-shaped trampoline. The petal-shaped trampoline comprises a trampoline frame, wherein a jumping net is mounted in the trampoline frame, a plurality of vertical rods are evenly arranged at a top end of the trampoline frame, an elastic skipping rope fixing head is fixed at a top end of the vertical rod, a plurality of connecting devices are uniformly arranged on the trampoline frame, fixing devices are arranged on the vertical rods, a top frame is arranged betweenthe fixing devices, a protective purse seine is fixed between the trampoline frame and the top frame, the protective purse net is larger than the jumping net, a plurality of inclined supporting rodsare evenly arranged at a top end of the trampoline frame, a protective air cushion ring is fixed among a plurality of inclined supporting rods, a plurality of supporting devices are evenly fixed to abottom end face of the trampoline frame, protection devices are arranged among the supporting devices, and a plurality of sound boxes are evenly arranged on an outer side wall of the trampoline frame.The trampoline is advantaged in that the trampoline is safe to use, simple in structure, low in cost, long in service life and convenient to popularize.

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.

The invention relates to the technical field of polishing machines and in particular provides a wall surface construction polishing machine for construction. The wall surface construction polishing machine comprises a handle and a buffer box; the top end of the handle is provided with an outer shell; a motor is arranged in the outer shell; a rotating shaft of the motor is connected with one end of a transmission shaft; a key arranged at the surface of the transmission shaft matches a key groove in an end cap; the end, away from the motor, of the transmission shaft is provided with a round disc; the surface of the transmission shaft is provided with a spring in a sleeved manner; one end of the spring is fixed to the surface of the end cap and the other end of the spring is fixed to the surface of the round disc; two limit rings are arranged on the surface of the inner wall of the buffer box; the end, away from the end cap, of the buffer box is provided with a bearing plate; the bearing plate is provided with an annular buffer fixing ring in the circumferential direction; the surface of the bearing plate is provided with a grinding wheel. The spring and round disc structure achieves a good buffer effect on the bearing plate, so that the leveling capability of the polishing machine is improved and the phenomenon of bottom exposure is prevented effectively.

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.

A curved portion that descends in an arcuate shape is formed in the damper inner peripheral portion, a corrugated portion is formed from an outer peripheral end of the curved portion to the damper outer peripheral portion, and a length of the damper inner peripheral portion is shorter than a length of the corrugated portion.

The invention discloses a damping type grounding-preventing shock absorber and a motor tricycle. The damping type grounding-preventing shock absorber comprises an inner barrel, an outer barrel and a shock absorbing main spring. The shock absorbing main spring sleeves the inner barrel and the outer barrel simultaneously. The damping type grounding-preventing shock absorber also comprises a grounding-preventing damping part mounted at the bottom in the outer barrel bearing down on the inner barrel, and when the inner barrel is sleeved downward on the grounding-preventing damping part, a gap exists between the inner barrel and the grounding-preventing damping part transversely; the inner barrel is sleeved in the outer barrel through a piston, a lubricating hole is formed in a position, abovethe piston, of the inner barrel, a space opposite to the downward piston in the outer barrel is filled with oil, and the space communicates to the inner barrel. The shock absorber adopts the grounding-preventing damping part arranged at the bottom of the outer barrel. In the process that the inner barrel moves downward and is sleeved on the grounding-preventing damping part, hydraulic oil in the outer barrel enters into the inner barrel only through the gap to form an effective compressive damping force to prevent grounding effectively. Meanwhile, the hydraulic oil is pressed to flow above thepiston through the lubricating hole, so that the piston is lubricated favorably and a stress concentration phenomenon of the piston is improved.

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 straight line module convenient to mount. The straight line module convenient to mount comprises a guiding rail piece, a lead screw, a lead screw nut sleeve and a motor, theguiding rail piece is parallel to the lead screw, the lead screw nut sleeve is connected with the lead screw in a sleeving mode, the straight line module further comprises mounting plates, the mounting plates are simultaneously connected to the two ends of each of the guiding rail piece and the lead screw, a mounting groove for being matched with the section of the guiding rail piece is formed inthe lower end of each mounting plate, each mounting groove comprises a set of outer arc protrusions and square grooves, a thread hole is formed between each square groove and one side surface of the corresponding mounting plate, a lead screw positioning and mounting hole is further formed in the upper portion of each mounting groove, and the mounting plates are connected to the two ends of the lead screw in a sleeving mode through the lead screw positioning and mounting holes. According to the straight line module convenient to mount, mounting and detaching are simple and convenient, the straight line module does not lose stability through the structure of the lower center of gravity, and the maintaining and replacing efficiency is further improved while the machining precision is ensured.

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.