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 an acoustic-optic fusion-based seafloor high-resolution towed-type detection device. The device comprises a measuring ship and an underwater detection assembly; the underwater detection assembly comprises an optoelectronic towed body replacing a ballast; one end of the optoelectronic towed body is connected with the measuring ship through a photoelectric composite cable, and the other end of the optoelectronic towed body is provided with an acoustics towed body; and the optoelectronic towed body is integrated with an integrated detector. In order to solve the problem that no acoustics-optics fusion-based detection device for marine detection exists and to eliminate the defects of inconvenience in optical detection distance adjustment, the instability of the seafloor attitude of an acoustic detector, and high possibility of being lost of an optic detector under the condition of the fracture of the photoelectric composite cable, the invention systematically provides the acoustic-optic fusion-based detection device and method. According to the acoustic-optic fusion-based detection device and method, the height of the optic detector can be adjusted according to a seafloor attitude, so that the optic detector can be prevented from touching the seafloor; and the optic detector can float automatically.

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.

A support surface includes a foam base layer including a foam bottom layer and a pair of foam side edges disposed adjacent sides of the foam bottom layer. The foam side edges are firmer than the foam bottom layer. A honeycomb material layer is disposed over the foam base layer, and a cover surrounds the foam base layer and the honeycomb material layer. The combination of foam and honeycomb material provides an effective support surface resulting in superior pressure relieving characteristics, resistance to bottoming out, good edge support, and reduced manufacturing costs.

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 belongs to the field of vehicle explosion prevention, and particularly relates to a military vehicle seat buffer partition device and a buffer partition method. The device is arranged onthe back or a side surface of a seat framework, and comprises a fixing mechanism, a starting mechanism, and a buffer mechanism. The fixing mechanism comprises an upper fixing single head and a lowerfixing single head and is used for realizing connection between the buffer partition device and a seat; the starting mechanism is used for preventing false triggering of the buffer partition device and starting of a buffer energy absorption process; the buffer mechanism is used for buffering and isolating impact energy in an explosion process; and an inner pipe, an outer pipe and a plate-shaped serpentine spring arranged between the inner pipe and the outer pipe are included, the lower end of the serpentine spring is connected with the lower fixing single head, the lower fixing single head isconnected with the inner pipe, the upper fixing single head is connected with the outer pipe, and the upper end of the serpentine spring can move for a certain distance relative to the outer pipe. According to the seat buffer partition device, isolation of impact energy from the seat to a passenger is achieved through plastic deformation of the serpentine spring after the seat is impacted, and seat protection performance is effectively improved.

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.

The invention discloses a damping piston assembly which comprises a piston body, a sliding sleeve and an elastic part. The piston body is provided with a damping channel used for communicating with anupper chamber and a lower chamber of an outer barrel. The bottom of the damping channel is provided with multiple sets of lower liquid passing holes arranged in the axial direction and used for communicating with the lower chamber of the outer barrel. The sliding sleeve is arranged on the piston body in a sleeving manner by being capable of sliding up and down. The elastic part provides elastic force for the sliding sleeve, wherein the elastic force is used for limiting upward sliding of the sliding sleeve. When the piston assembly moves downwards in the outer barrel, the sliding sleeve is driven by damping liquid in the lower chamber of the outer barrel to advance relative to the piston body, and therefore the lower liquid passing holes are closed one by one from bottom to top. Accordingto the damping piston assembly, the damping in a damper can be self-adaptively changed according to road conditions, adaptability to road conditions is good, damping force is gradually increased in the damping process, damping force changes are quite smooth, the damping effect is improved, and riding comfort is improved; and the piston assembly can effectively prevented from bottoming out in theouter barrel under the condition that roads are jolty.

The invention discloses a compression valve for an automobile shock absorber. According to the compression valve, an inner pipe (1) and an outer pipe (2) are arranged sequentially from the inside out;the inner pipe (1) is inserted into the outer pipe (2); the inner chamber of the inner pipe (1) is set as a working chamber (3); a piston rod (4) is inserted into the working chamber (12) of the inner pipe (1); a shock-absorbing compression valve (5) is arranged at one end of the piston rod (4); a sealing ring (12) is arranged at the other end of the piston rod (4); and a shock-absorbing spring (13) sleeve the inner pipe (1) and the outer pipe (2). The compression valve can improve the shock-absorbing effect and reduce the friction.

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 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 an in-situ removal device and a removal method for overwintering cyanobacteria in lake sediment, and belongs to the technical field of water environment research. The in-situ removal device for the overwintering cyanobacteria in the lake sediment comprises a reactor of which the bottom is open; the reactor is directly mounted on the lake sediment to form a closed reactor internal environment; a filter screen is arranged in the reactor; an adsorption material is placed on the filter screen; a water body disturbance device is arranged under the filter screen; the water body disturbance device comprises disturbance blades; the disturbance blades drive a water body to move; the cyanobacteria, nitrogen, phosphorus and algal toxin can be controlled and removed effectivelyby performing the in-situ removal work of the cyanobacteria by utilizing the in-situ removal device for the overwintering cyanobacteria in the lake sediment provided by the invention.

The invention discloses a device for preventing yarn bottom falling of a two-for-one twister in the processing process. The device structurally comprises a spindle, a bobbin and a bottom falling preventing cushion. The spindle and the bobbin are located on the same horizontal plane, the spindle and the bobbin are connected, and the bottom falling preventing cushion is arranged at the bottom of the spindle. The bottom falling preventing cushion is composed of a gasket and a center hole. The gasket and the center hole are round, the gasket and the center hole are concentric circles, the gasket is provided with the center hole, the diameter of the inner circle of the gasket is slightly smaller than the outer diameter of the bobbin, and the diameter of the outer circle of the gasket is equal to the inner diameter of the spindle. The thickness of the gasket is 4 mm, the gasket is a soft sponge, and the bobbin is used for storing yarn. The sponge is cushioned into the bottom of the spindle, the phenomenon of yarn bottom falling is effectively avoided, yarn twisting production is smoothly carried out, and meanwhile the product quality is guaranteed.

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 an inland river ship electric propulsion system with high navigation maneuverability. The system comprises an electric power system and a full-rotation propulsion system capable of being lifted, retracted and released. The full-rotation propulsion device comprises a tilting and swinging mechanism arranged on a ship body, the tilting and swinging mechanism comprises a rotating disc which is arranged on the ship body and rotates around the horizontal axis and a tilting and swinging driving device for driving the rotating disc, the output end of the tilting and swinging driving device stretches out or retracts back to drive the rotating disc to rotate, and a rotation mechanism is connected to the rotating disc. The rotation mechanism comprises a rotation base, the rotation base is connected with the rotating disc through a rotating shaft arranged on the rotation base, a hollow rotation body capable of rotating by 360 degrees on the plane, perpendicular to the discface of the rotating disc, in a cavity of the rotation base is arranged in an inner cavity of the rotation base, and a lifting mechanism moving in the direction of the center axis of the rotation bodyis arranged on the rotation body. And the lifting mechanism is provided with a hollow hub full-rotation propelling system. The invention further discloses an inland river ship navigation control method comprising the inland river ship electric propulsion system.

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 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.

The invention discloses a compression valve of an inverted front shock absorber. An internal pipe (1) and an external pipe (2) are arranged from inside to outside in sequence in the compression valveof the inverted front shock absorber. The external pipe (2) is inserted into the internal pipe (1). The inner cavity of the internal pipe (1) is arranged as a working cavity (3). A piston rod (4) is inserted into a working cavity (12) of the internal pipe (1). A shock absorption compression valve (5) is arranged at one end of the piston rod (4). By means of the compression valve of the inverted front shock absorber, the shock absorption effect can be improved; and in addition, friction is reduced.