38results about How to "Reduced counter force" patented technology

The invention discloses a brushless DC (Direct current) motor driver. The brushless DC motor driver structurally comprises a power supply changeover control module, a main control chip control module, a switch module and a power amplification output module, wherein the motor driver has three control modes below: rotating speed data are directly sent to a single-chip through 485 communication; rotating speed analogue input, that is to say, the input analogue signal is changed into a digital signal through A / D conversion, and then processed and changed into rotating speed data through the single-chip; rotating speed PWM ((Pulse Width Modulation) input, that is to say, an input PWM signal is sampled, and then changed into the rotating speed data based on a PWM duty ratio. The driver is simple in control method, high in speed adjusting precision and diversified in control mode, can export a negative current, can completely control the motor, can efficiently reduce system complexity, can reduce system cost and resource waste, and enables installation, debugging and after-sale to be simple.

The invention relates to a fluid absorbent sanitary product. The fluid absorbent sanitary product comprises a surface layer, a bottom layer and an absorbent core located between the surface layer andthe bottom layer, wherein the surface layer is made of a body fluid permeable material; the bottom layer is a waterproof layer; the absorption core comprises a front wing and a rear wing; the absorption core is also provided with a middle convex core which is located between the front wing and the rear wing; the rear wing is provided with a second U-shaped opening which is arranged in the length direction of the absorption core; and the opening direction of the second U-shaped opening is opposite to the direction of the middle convex core. The fluid absorbent sanitary product provided by the invention has the following effects: the fluid absorbent sanitary product can maintain a preset shape after being pressed; the reverse acting force generated by the absorption core at the second U-shaped opening is small; friction to a wearer is reduced; the stability of an absorption area is maintained; a body fluid is prevented from leaking through a femoral seam; and leakage of the body fluid isnot likely to happen to the wearer in the using process.

The invention discloses a planar induction coaxial multi-excitation-group multi-stator-group generator, which includes a base. A mounting frame is mounted on the base. A housing is mounted on the mounting frame. An assembly body is mounted in the middle of the mounting frame. A single-sided stator body and a double-sided stator body are mounted on the housing. According to the planar induction coaxial multi-excitation-group multi-stator-group generator, the mounting structure of a rotor body, the single-sided stator body and the double-sided stator body is perpendicular to the center line of the assembly body, the magnetic induction is bi-planar induction, the coil winding is parallel to the center line of the assembly body, and the bipolarity of excitation bodies is fully utilized to generate electricity through the action of excitation induction on the coil winding. The difficulty in the production technology of a multi-pole low-speed generator is solved. The reverse acting force ofunipolar circular motion under the action of load is reduced. The power factor is greatly improved. Higher-frequency and stable payload electric energy can be output under the same external power.

The invention belongs to the field of backpacks, and particularly relates to a load-reducing suspension system capable of remarkably reducing force exerted on a wearer by a load and a backpack with the load-reducing suspension system. The load-reducing suspension system comprises a fixed plate and a sliding plate, wherein the sliding plate is connected to the fixed plate through a sliding part, anadjustable elastic assembly is arranged on the fixed plate, the movable end of the adjustable elastic assembly is connected with the sliding plate, and the adjustable elastic assembly can be adjustedaccording to the load on the sliding plate, so that the force output by the adjustable elastic assembly is just counteracted with the gravity of the load. According to the invention, actual loads aredifferent; the adjustable elastic assembly is adjusted to be matched with the load weight; the adjustable elastic assembly has a good deformable space within the rated load range, then the load reduction effect can be effectively achieved, further, the volute spiral spring is adopted as a torque assembly of the adjustable elastic assembly, and compared with an elastic rope, the adjustable elasticassembly has the longer service life and better environmental adaptability.

The invention relates to a tunnel heading machine and a gripper shoe device thereof. The gripper shoe device comprises a saddle frame; a main gripper shoe oil cylinder and a main gripper shoe are arranged on the saddle frame; an auxiliary gripper shoe oil cylinder and an auxiliary gripper shoe are further arranged on the saddle frame; the supporting area of the auxiliary gripper shoe is smaller than the supporting area of the main gripper shoe; the auxiliary gripper shoe and the main gripper shoe are aligned in the extending direction of a tunnel; and in the circumferential direction of the tunnel, the auxiliary gripper shoe and the main gripper shoe are arranged in a staggered mode. When the gripper shoe device passes through a hard rock area, only the main gripper shoe supports the tunnel, and when the gripper shoe device passes through a soft broken surrounding rock area, only the main gripper shoe cannot provide enough reaction force, the auxiliary gripper shoe oil cylinder drives the auxiliary gripper shoe to move to a supporting position, and the auxiliary gripper shoe and the main gripper shoe support the tunnel together, so that the supporting area of the gripper shoe device can be increased, the counter-acting force on the tunnel in unit area can be reduced, and soft and broken surrounding rock is effectively supported; and the passing rate of the tunnel heading machine at the soft and broken surrounding rock can be effectively improved when the gripper shoe device is applied to the tunnel heading machine.

This invention provides a novel solution for an optimally powered crank for a human-powered vehicle, such as a bicycle. This invention includes a novel system and method to optimize the length of each crank arm throughout the revolution of the crank assembly. First, a crank arm assembly is attached to the bicycle's existing spindle assembly. The crank arm assembly includes a rail section that is fixed at one end to the mounting section of the crank arm assembly. Next, the opposite end of the rail section is attached to the sliding section of the crank arm assembly. The sliding section of the crank arm assembly also includes a feature that allows the sliding section to collapse and expand along the rail section. The crank arm assembly also includes at least two track rollers mounted to the side of each sliding section designed to reduce friction and counter inertial forces associated with the crank arm assembly sliding along the tracks. Next, the assembly includes two tracks mounted on each side of the frame. The tracks are used to control the length of the crank arms at each angular position. Finally, the shape of each track is designed to coincide with the optimum crank arm length at the various angular positions as the crank arm rotates through a complete revolution.

A brake pedal simulator, a vehicle braking system and a vehicle are provided. The brake pedal simulator includes a brake pedal, a booster motor, an assembly portion, a first elastic member and a second elastic member disposed on one side of the assembly portion in the axial direction and partially overlapping with each other in the axial direction, and a thrust structure hinged to the brake pedaland cooperating with the first elastic member to sequentially drive the first elastic member and the second elastic member to telescopically retract in the axial direction. The first elastic member provides a pedal preset force to the brake pedal, the output shaft of the booster motor is cooperated with the first elastic member through a screw mechanism to be able to provide power to the thrust structure, the first elastic member is compressed through the thrust mechanism in a first working state, and the first elastic member and the second elastic member are compressed synchronously through the cooperation of the thrust mechanism and the booster motor in a second working state. This provides a reliable braking feel of the brake pedal and simulates an accurate brake pedal force, and has the effects of good operation stability and corresponding quick brake pedal.

The invention discloses a high-stability rammer compactor for building construction in the technical field of engineering auxiliary equipment. The rammer compactor comprises a stabilizing mechanism, stable supporting frames, a compaction assisting frame, a balance weight centrifugal ball and a contraction spring. According to the high-stability rammer compactor, through the set of the stabilizingmechanism is set, when a ramming device is subjected to stress in an unstable direction, the inclination amplitude of the ramming device is greatly reduced through the reverse anti-toppling capabilityof the stabilizing mechanism, so that the stability of the rammer compactor during ramming is improved; through the set of the stable supporting frames, the stable supporting frames make contact withthe ground when earth ramming is conducted, certain supporting is conducted between equipment and the ground, the equipment is prevented from toppling over, the stability of the equipment during earth ramming is improved; through the set of the compaction assisting frame, the balance weight centrifugal ball and the contraction spring, the downward pressing capacity is enhanced and rammed earth strength is improved when the equipment rams earth downwards; and when the equipment moves upwards, the upward moving amplitude of the equipment is reduced, the reverse acting force is reduced, the stability of the equipment is improved, and the rammer compactor has the beneficial effects of being high in earth ramming capacity and high in stability.

The invention discloses a mechanical arm with a labor-saving function. The mechanical arm comprises a supporting rod, an air pump, a first-stage rotating joint, an auxiliary arm, a power arm and a manipulator; a fixed base is installed under the supporting rod, a controller is installed at the left side of the supporting rod, a main rotating joint is installed on the supporting rod, the air pump is arranged above the main rotating joint, a main arm is installed at the right side of the air pump, the first-stage rotating joint is installed at the right side of the main arm, elastic rods are installed in the manipulator, and a clamping plate is installed under each elastic rod. According to the mechanical arm with the labor-saving function, by means of the elastic rods installed in the manipulator, when the manipulator is used for clamping an object, certain buffering and power assisting effects on tension strength of the elastic rods can be achieved by the manipulator according to weight of the object, and therefore opposite acting force subjected by the power arm and the manipulator is reduced; the mechanical arm can pull up a heavier object by means of smaller acting force, and therefore a labor-saving effect is achieved.

A brake pedal simulator, a vehicle braking system and a vehicle are provided. The brake pedal simulator includes a brake pedal, a booster motor, an assembly portion, a first elastic member and a second elastic member disposed on one side of the assembly portion in the axial direction and partially overlapping with each other in the axial direction, and a thrust structure hinged to the brake pedaland cooperating with the first elastic member to sequentially drive the first elastic member and the second elastic member to telescopically retract in the axial direction. The elastic resilient member provides a pedal preset force to the brake pedal, The output shaft of the booster motor is cooperated with the first elastic member through a rack and pinion mechanism so as to be able to provide assistance to the thrust structure, the first elastic member is compressed through the thrust mechanism in a first working state, and the first elastic member and the second elastic member are compressed synchronously through the cooperation of the thrust structure and the booster motor in a second working state. This provides a reliable braking feel of the brake pedal and simulates an accurate brake pedal force, and has the effects of good operation stability and corresponding quick brake pedal.

The invention discloses watered sandy stratum earth pressure balance shield residue earth flattening equipment for tunnel construction, relates to the technical field of residue earth flattening equipment, in particular to the watered sandy stratum earth pressure balance shield residue earth flattening equipment for tunnel construction. The watered sandy stratum earth pressure balance shield residue earth flattening equipment for tunnel construction comprises a middle pressure wheel, an underframe plate and nozzles; the left side of the middle pressure wheel is provided with an auxiliary fixedplate; the left side of the auxiliary fixed plate is provided with a back pressure wheel; the front end of the underframe plate is provided with an auxiliary gas tank; the underframe plate is arranged at the front end of the auxiliary fixed plate; one end, far away from the underframe plate, of the auxiliary gas tank is provided with an auxiliary drive motor; and the left side of the auxiliary drive motor is provided with an auxiliary connection rod. According to the watered sandy stratum earth pressure balance shield residue earth flattening equipment for tunnel construction, a dust mask canprevent external dust from entering into a guide rod, and oil immersed sponge can effectively provide a lubrication effect to a push rod so as to lighten mechanical abrasion between the guide rod andthe push rod and be capable of effectively lightening the impact force between the guide rod and the push rod.

The invention relates to a stuffing discharging machine capable of reducing extrusion damage. The stuffing discharging machine comprises a bag placing mechanism, wherein the bag placing mechanism is provided with a stuffing discharging operation piece used for conducting stuffing discharging operation on a stuffing bag. The stuffing discharging machine further comprises a stuffing extruding forceapplying mechanism used for driving the stuffing discharging operation piece, and is characterized in that the stuffing discharging operation piece comprises a bag opening operation piece used for conducting stuffing discharging operation on a bag opening, and the bag opening operation piece is provided with a rotating shaft and a protruding block protruding in the radial direction; along with rotation of the rotating shaft, the protruding block starts to contact with the bag body, then transversely extrudes the bag body, extrudes the stuffing towards the bag opening at the same time and thenleaves immediately, the surface, which is in contact with the bag body, of the protruding block is made of a hard material, the bag opening operation piece is provided with an elastic piece to providereverse buffering for the protruding block which transversely extrudes the bag body, the stuffing extruding force applying mechanism is provided with an axial movement motor capable of moving in theaxial direction, and the axial movement motor moves in the axial direction to be in butt joint with the rotating shaft so as to achieve driving. According to the invention, the problem of failure of the stuffing discharging machine due to frequent breakage and damage of the protruding block in the conventional stuffing discharging machine is solved.

The invention relates to a tunnel boring machine and a support shoe device. The support shoe device comprises a saddle frame, a main support shoe oil cylinder and a main support shoe are arranged on the saddle frame, and an auxiliary support shoe oil cylinder and an auxiliary support shoe are also arranged. The support area is smaller than that of the main support shoe, the auxiliary support shoes and the main support shoes are aligned in the tunnel extension direction, and the auxiliary support shoes and the main support shoes are staggered in the tunnel circumferential direction. When passing through hard rock areas, the tunnel can only be supported by the main support shoes. When passing through weak and broken surrounding rock areas, only relying on the main support shoes cannot provide sufficient support and reaction force, and the auxiliary support shoe cylinder drives the auxiliary support shoes to move to support At the top position, the auxiliary support shoe and the main support shoe support the tunnel together, which can increase the support area of ​​the support shoe device, reduce the reaction force on the tunnel per unit area, and effectively support the weak and broken surrounding rock. When the support shoe device is applied to a tunnel boring machine, the passing rate of the tunnel boring machine in the weak and broken surrounding rock can be effectively improved.

A brake pedal simulator, a vehicle braking system and a vehicle are provided, wherein the brake pedal simulator includes a brake pedal, a booster motor, an assembly part for fitting to a vehicle body,a first elastic member and a second elastic member axially disposed on one side of the fitting portion and connected to each other, and a thrust structure hinged to the brake pedal and cooperating with the first elastic member to drive the first elastic member and the second elastic member while telescoping in the axial direction. The first elastic member and the second elastic member cooperate together to provide a pedal preset force to the brake pedal, and the output shaft of the booster motor is cooperated with the second elastic member through a screw mechanism to be able to provide a booster force for driving the thrust structure. The invention provides a reliable braking feel of the brake pedal and simulates an accurate brake pedal force, and has the effects of good operation stability and corresponding quick brake pedal.

The invention discloses a ship rudder stabilization and energy-saving system, and relates to the technical field of ships. Specifically, it is composed of a rudder stabilizing diverter unit, a rudder empennage stabilizing unit, a rudder lower arc energy-saving unit, a rudder upper ladder line energy-saving unit, and a rudder control energy-saving unit. The rudder deflector stabilization unit includes a steering plate deflector and a horizontal shafting deflector; the rudder empennage stabilization unit includes a rhomboid empennage and a composite joint surface; the lower arc energy-saving unit of the rudder steering plate includes a lower arc The vertical height position of the line apex; the ladder line energy-saving unit on the rudder steering plate includes the vertical height position of the trapezoid and the trapezoidal waist; the rudder control energy-saving unit is the horizontal position of the lower arc and the apex position of the upper ladder platform, The torsion golden centerline formed by the line connecting two points. The invention reduces the vibration of the rudder, improves the stability of the rudder, reduces the flow resistance of the rudder and controls the torque, and enhances the precision, directivity, response speed and service life of the rudder.

A brake pedal simulator, a vehicle braking system and a vehicle are provided, wherein the brake pedal simulator includes a brake pedal, a booster motor, an assembly part for fitting to a vehicle body,a first elastic member and a second elastic member disposed axially on one side of the fitting portion and at least partially overlapping with each other in the axial direction, and a thrust structure hinged to the brake pedal and cooperating with one end of the overlapping portion of the first elastic member and the second elastic member to be capable of driving the first elastic member and thesecond elastic member while telescoping in the axial direction. The first elastic member and the second elastic member cooperate to provide a pedal preset force to the brake pedal, and the output shaft of the booster motor cooperates with the one end of the overlapping portion of the first elastic member and the second elastic member through a screw mechanism so as to be able to provide the boosting force to the thrust structure. This provides a reliable braking feel of the brake pedal and simulates an accurate brake pedal force, and has the effects of good operation stability and corresponding quick brake pedal.

The invention discloses a tomato storage isolation device which comprises a contact plate, a telescopic component and a fixed plate which are sequentially connected. The contact plate is parallel to the fixed plate, one end of the telescopic component is connected with the contact plate, the other end of the telescopic component is connected with the fixed plate, the telescopic component comprisesa mounting cylinder and a cylindrical air bag which are sequentially and coaxially connected, one end of the air bag is inserted into a center hole of the mounting cylinder, the other end of the airbag penetrates the center hole and is connected with the contact plate, and the air bag is compressed downwards, so that the contact plate can approach to the fixed plate. According to the device, airpositioned below the contact plate conveniently flows, so that the humidity of the bottom of a vegetable basket is reduced, bacterium breeding speed is reduced, vegetable rotting speed is reduced, the air bag is compressed and then deformed when the vegetable basket is placed, vegetables positioned in the vegetable basket are buffered, and bump and damage to the vegetables caused by excessive vegetable basket placing impact force are avoided.

The invention discloses an automobile steering system which comprises a pull rod, a steering gear driving the pull rod to move and a buffer device arranged between the steering gear and the pull rod.The buffer device comprises a buffer assembly connected between the steering gear and the pull rod and a locking assembly arranged on the buffer assembly and used for locking the buffer function of the buffer assembly. According to the steering system, the acting force of wheels reversely acting on the pull rod and the steering gear can be buffered through the buffer assembly, so that parts of thesteering system are effectively protected and the reliability of the steering system is improved; meanwhile, through cooperation of the buffering assembly and the locking assembly, driving of the automobile under various working conditions is facilitated, accurate steering under the working conditions of good road conditions or high automobile speed is facilitated, and buffering of the reverse acting force under the working conditions of bumpy road conditions and low automobile speed is also facilitated.

The invention discloses a streamlined valve core of an electric EGR valve. The streamlined valve core of the electric EGR valve comprises a straight part located in a waste gas cavity of the electric EGR valve and an elliptical part connected in an air inlet port of the waste gas cavity in a penetrating manner. The top end of the elliptical part is connected with the edge of the straight part in a transition manner and the bottom end of an electric EGR valve center rod is fixedly connected with the center of the straight part. The valve core is strong in waste gas impact resistance, low in improving cost and capable of greatly reducing the dependency on the motor torque and meeting the usage requirements of a diesel engine, which is high in emission class, in various working conditions.

The invention discloses an FPC capable of reducing the self-twisting stress, and belongs to the technical field of circuit boards. The FPC comprises a flexible substrate and a wiring layer arranged onthe flexible substrate. The flexible substrate comprises a horizontal part, a vertical part and a bending part connected with the horizontal part and the vertical part, wherein the width of the bending part is smaller than that of the horizontal part and that of the vertical part, so that a distortion stress acting on the end part of the flexible substrate is transferred to the narrower bending part. According to the invention, the width of the bending part of the flexible substrate is reduced, and corner structures with different angles are arranged at the inner side and the outer side of the bending part, so that the distortion stress generated at the joints where the horizontal part and the vertical part of the flexible substrate are connected with the connector is transferred to the narrower bending part, thereby reducing the distortion degrees of the horizontal part and the vertical part, enabling the connection areas among the horizontal part, the vertical part and the connectorto be more stable, and improving the reliability of a product in the use process.

The invention discloses a special-shaped sealing ring for a vacuum milling clamp for skin parts, and relates to the technical field of vacuum milling clamps in aircraft manufacturing. The special-shaped sealing ring comprises a bottom surface structure, a boss structure and a side surface structure, the boss structure is a transition structure between the bottom surface structure and the side surface structure, and one end of the side surface structure is connected with the boss structure; and the other end of the side surface structure is suspended and is provided with a chamfer, the bottom surface structure, the boss structure and the inner surface of the side surface structure form a middle hollow structure, and the inner side of the side surface structure and the inner side of the bottom surface structure form an angle of 48 + / -2 degrees. The invention further relates to a use method of the special-shaped sealing ring. The condition that in the clamping and part machining processes of a sealing structure after vacumm absorption, when a part is tightly attached to the molded surface of a clamp, the air leakage phenomenon does not occur, and the hole forming precision can meet the use requirement are effectively guaranteed.

A brake pedal simulator, a vehicle braking system and a vehicle are provided, wherein the brake pedal simulator includes a brake pedal, a booster motor, an assembly part for fitting to a vehicle body,a first elastic member and a second elastic member arranged at axially spaced intervals on both sides of the fitting portion and connected to each other, and a thrust structure hinged to the brake pedal and cooperating with the first elastic member to drive the first elastic member and the second elastic member while telescoping in the axial direction. The first elastic member and the second elastic member cooperate together to provide a pedal preset force to the brake pedal, and the output shaft of the booster motor is cooperated with the second elastic member through a screw mechanism to beable to provide a booster force for driving the thrust structure. This provides a reliable braking feel of the brake pedal and simulates an accurate brake pedal force, and has the effects of good operation stability and corresponding quick brake pedal.