71 results about "Resistance force" patented technology

The application relates to the technical field of bridge vibration control, in particular to a bridge excitation and damping integrated device, a bridge and a laying method. The bridge excitation and damping integrated device comprises a mass block, a spring assembly, an actuator and two groups of lever assemblies. The middle part of the mass block is provided with a mounting hole, and a flywheel is arranged on the mass block. The spring assembly is arranged below the mass block and connected with the mass block, and the other end is connected with a structure to be damped. The actuator is arranged in the range of the mounting hole. The two groups of lever assemblies are respectively connected with the mass blocks on the two sides of the mounting hole through power arm ends, and the resistance arm ends are connected with the end parts of the telescopic rods of the actuator. When the telescopic rods of the actuator are telescopically extended or retracted, the mass blocks are driven to move up and down through the lever assemblies. The problem that the damping effect is only predicted through numerical simulation or simplified model test in the prior art and it is difficult to adjust parameters after installation can be solved. In addition, the nesting layout of the actuator and the mass block can reduce the requirement for the installation space by using the lever displacement amplification principle.

The utility model relates to flexible conveying pipe technical field, concretely for a kind of deviation rectifying device for flexible composite high-pressure conveying pipe production, including fixed frame, and the middle part is penetrated and is provided with circular slot, and the front of the fixed frame and located the outside fixed connection of circular slot has fixed ring, four clamping mechanisms are set on fixed ring with equal arc;Gear ring, its activity is set to the side of fixed frame away from fixed ring, driving mechanism is set between the gear ring and clamping mechanism. The utility model realizes the synchronous control of four clamping rollers by the accurate positioning meshing cooperation of gear one and gear ring, and the coaxial linkage design of gear two and gear three, effectively solve the problem that the pressure fluctuation in existing pneumatic system leads to inconsistent problem of resistance force.

This utility model discloses a rotary damping dial, relating to the field of mechanical transmission and control. It includes an outer wheel, an inner wheel, and a damping mechanism. At least one damping mechanism is provided between the outer and inner wheels. The damping mechanism includes a set screw threaded onto the outer wheel, a spring at the tail end of the set screw, and a damping pin. By tightening or loosening the set screw, the spring is compressed or released, thereby adjusting the resistance of the damping pin on the inner wheel. The damping mechanism of this utility model consists of a set screw, a spring, and a damping pin. In use, by tightening or loosening the set screw, the spring force is changed, thereby adjusting the resistance of the damping pin on the inner wheel. The resistance between the damping pin and the inner wheel can be adjusted according to the usage scenario, allowing the same specification of damping dial to be used in different scenarios, thus improving the flexibility and practicality of the damping dial.

The present application relates to the field of stamping equipment, especially to a kind of stamping integrated equipment and method of energy storage steel row, including rack, the top of the rack is fixedly connected with workbench, the top of the workbench is installed with bottom plate, the top of the bottom plate is installed with lower die plate, the rear side of the workbench is installed with fixed frame, the front end of the fixed frame is fixedly connected with hydraulic cylinder in upper portion, the bottom of the hydraulic cylinder is fixedly connected with mounting plate in telescopic end, the bottom of the mounting plate is installed with upper die plate by bolt, the bottom of the upper die plate is all penetrated and slidably connected with guide pillar, the bottom end of the guide pillar is all fixedly connected with middle pressure plate, ultrasonic vibration head is arranged in bending stage, and high-frequency vibration is transmitted to bending plate by vibration piece and hydraulic medium, high-frequency dynamic stress disturbance is applied to material while the mechanical bending force acts, can promote material internal dislocation movement and plastic flow, reduce local deformation resistance, to effectively reduce bending forming force.

The utility model relates to the technical field of drawing reducing diameter device, especially to a kind of crude product welding wire welding wire drawing reducing diameter device, its improve the convenience of control adjustment to welding wire tension size, improve the flexibility of welding wire drawing force adjustment;Including base and recess, recess is set on the outside wall of base;Still include resistance device, conveying device, adjusting device, spool, fixed base, first tension wheel and second tension wheel, the both ends of spool are embedded in recess inside, resistance device is provided on base, resistance device is used to provide resistance for the rotation of spool, fixed base is set on the outside wall of base, a plurality of first tension wheels are rotatably installed on fixed base, a plurality of second tension wheels are rotatably set on fixed base by adjusting device moving up and down, conveying device is set on fixed base, and conveying device is used to draw and convey welding wire.

The application discloses a design method of an integrated mechanical model of a compression-resistant composite anti-floating anchor rod, and specifically comprises the following steps: obtaining a parameter set of a multi-layer structure of a target geotechnical engineering anti-floating anchor rod, analyzing the hierarchical interface mechanical behavior, generating an interface shear stress transfer function, embedding the function into an axisymmetric stress analysis framework, obtaining an axial force and a side resistance distribution function of the whole length of the anchor rod, constructing an integrated mechanical balance equation set, segmentally numerically solving the equation set, outputting mechanical response characteristic curves at different depths, and finally determining a limit anti-floating bearing capacity prediction value according to the curves as a design output.

The application discloses a resistance adjusting device for seated power training, which comprises a base installed above a weight disc, a force storage assembly, a clutch assembly and an adjusting assembly arranged on the base, the force storage assembly is provided with automatic locking and unlocking functions, stores force in a centripetal phase of the weight disc ascending, is unlocked when the weight disc reaches the highest point, and exerts pressure downward in a centrifugal phase to provide additional resistance, the clutch assembly is used for switching driving sources to drive the force storage assembly to reset or the adjusting assembly to select gears, the adjusting assembly comprises a rotating disc and a plurality of force storage units, different force storage springs are selected by rotating the rotating disc to coarsely adjust resistance, and the pre-compression amount of the spring is changed by an adjusting screw rod to finely adjust the resistance, the application solves the problems of inconvenience in centrifugal resistance adjustment of traditional equipment and incapability of automatic exertion, realizes automation, precision and safety of centrifugal overload training, and is compact in structure and convenient to adjust.

The application provides a steering control method and device when automatic driving is taken over, and relates to the technical field of automatic driving. The method comprises the following steps: acquiring a steering force applied on a steering column by a steering machine when a driver takes over; and controlling a power-assisted system to apply a resistance force decreasing over time on the steering machine, so that the steering machine releases the steering force under the action of the resistance force. The application avoids the problem of poor vehicle lateral stability caused by the sudden release of the steering force by the steering machine.

The application relates to the field of training equipment and discloses a rowing machine, wherein the rowing machine comprises a rowing machine body, the rowing machine body comprises a force generating assembly for providing rowing resistance; a sleeve assembly is in transmission connection with the force generating assembly; a frame body is arranged along a first direction, and one side of the frame body is fixedly connected with the rowing machine body; a pull rod is connected with the sleeve assembly through a pull rope, and the force generating assembly and the sleeve assembly rotate synchronously when the pull rod is pulled along the first direction; a first elastic member is connected with the sleeve assembly, and the first elastic member forms a driving force for driving the sleeve assembly to wind the pull rope when the pull rod is pulled along the first direction. The rowing machine provides auxiliary force in the process of switching the driving member from forward rotation to reverse rotation by arranging the first elastic member.

The application relates to a double-drawing cycle auxiliary device, and belongs to the technical field of aluminum profile machining. The device comprises a conveying mechanism, a cutting mechanism, a first drawing mechanism, a second drawing mechanism and a buffering mechanism. The conveying mechanism conveys the profile, the cutting mechanism is arranged on one side of the conveying mechanism and is used for cutting the profile; the first drawing mechanism and the second drawing mechanism are both arranged on the other side of the conveying mechanism and can reciprocate, the first drawing mechanism and the second drawing mechanism are used for clamping and alternately drawing the profile; the buffering mechanism comprises a first buffering assembly and a second buffering assembly, the first buffering assembly is arranged on the cutting mechanism, the first drawing mechanism and the second drawing mechanism are both provided with the second buffering assembly, when the first drawing mechanism and the second drawing mechanism approach the cutting mechanism, the first buffering assembly and the second buffering assembly cooperate with each other, so that the first drawing mechanism and the second drawing mechanism are subjected to resistance at a preset distance from the cutting mechanism and clamp the profile. The application has the effect of improving the problem of insufficient profile cutting precision.

This utility model relates to the field of automation and control technology, and discloses a rotary drilling bit, including a fixed frame. A hydraulic cylinder is fixedly connected to the inner wall of the fixed frame, and a movable frame is fixedly connected to the output end of the hydraulic cylinder. A connecting rod is fixedly connected inside the movable frame, and a first connecting piece is rotatably connected to the outer wall of the connecting rod. A movable rod is fixedly connected inside the first connecting piece, and a second connecting piece is rotatably connected to the outer wall of the movable rod. A fixed rod is rotatably connected inside the second connecting piece, and a limit component is provided on the outer wall of the movable frame. In this utility model, the hydraulic cylinder drives the movable frame, which in turn drives the connecting rod. The connecting rod drives the first connecting piece, which in turn drives the movable rod. The movable rod drives the second connecting piece to rotate on the outer wall of the fixed rod, thereby increasing the impact force on the rock and the cutting depth, and avoiding increased drill bit wear or drilling stagnation caused by hard rock resistance.

The utility model provides a kind of cannon head dismounting tool for blast furnace mud gun, including tight plate, it is blocking main body, for sticking cannon head end part to cannon head to exert resistance force, clamping plate is set to one side of tight plate, clamping plate is set to frame type structure, the inside wall of clamping plate is adapted to the connecting place of mud gun barrel and cannon head, for clamping positioning at the connecting place of mud gun barrel and cannon head, two connecting plates are respectively set to the two sides of tight plate and clamping plate, for connecting tight plate and clamping plate, to form the dismounting force structure to cannon head, the utility model is dismounted cannon head by mud pressure generated axial thrust steadily by tight plate and clamping plate cooperation, replace traditional hammering, avoid metal debris splashing, cannon head falling off and impact force cause equipment connecting place deformation, sealing element failure, improve dismounting safety and equipment reliability.

The application discloses a full magnetic suspension system based on bidirectional active axial force of a rotor and a control method thereof. The full magnetic suspension system is provided with an axial force winding 3, and a magnetic field rotating synchronously with the rotor generated on the winding can generate stable axial forces in two directions of attraction and repulsion to compensate for axial hydraulic force. The size and direction of the active axial force generated on the rotor can be actively controlled through the current on the axial force winding 3. The active Maxwell force and the Lorentz force in the axial direction are active suspension forces, and together with passive magnetic resistance force, form a composite axial suspension force. The application can effectively improve the axial stiffness by increasing the active axial force. The control method provided by the application can make the axial force of the rotor have good dynamic response speed, and has better anti-interference ability compared with passive suspension. The active axial electromagnetic suspension system greatly improves the stability performance of the magnetic suspension pump in the axial direction.

The present application relates to the technical field of steel metallurgy and metal rolling, in particular to a billet rough rolling and spreading method and system, comprising: a step of constructing a non-uniform deformation zone geometry: configuring a special-shaped pass based on a flow resistance gradient, and establishing a non-uniform hydrostatic pressure field; a step of executing forced transverse flow deformation induced rolling: forcing the metal to actively migrate in transverse mass from the center to both sides; a step of collecting lateral pressure rheological response data: monitoring width and resistance fluctuations and calculating lateral pressure rheological response lag time; a step of implementing dynamic lateral pressure adaptive control: applying dynamic lateral pressure to the intermediate billet based on the lag time, suppressing overturning instability and correcting the spread; the present application changes the direction of the minimum resistance of metal flow, solves the problem of time and space asynchronization between the system and flow deformation, and ensures the rolling stability of the non-steady state section.

The invention is a fastener (1) comprising a shaft (40) and a head (10), which can be mounted by clinching into sheet materials. The novelty of the invention lies in, in order to provide low installation force and high torque-out resistance, at least one clinching portion (20) extending from the bottom surface of the head (10), having at least one inclined surface (23) with a height that increases in the clockwise direction along the x-axis (x), having at least one lobe (21) comprising at least one outer arc (R2) and at least one inner arc (R1), which are oriented in the same direction around the x-axis (x) and intersect with each other, and having at least one root arc (R4) at the other ends of the outer arc (R2) and the inner arc (R1), and at least one intermediate arc (R3) located between the root arcs (R4).

Provided in the present invention is a tool shovel having a labor-saving lever structure. The tool shovel comprises a front shovel component, an operating component, a moving component and a support main body, wherein the front shovel component, the operating component and the moving component are all arranged on the support main body. The moving component comprises a roller, wherein the roller is pressed against the ground; a resistance force application point and a power force application point are formed above the roller, the resistance force application point is located on the support main body, and the power force application point is located on the support main body or the operating component; and the distance from the resistance force application point to the roller is L1, and the distance from the power force application point to the roller is L2, where L1 < L2. The tool shovel having a labor-saving lever structure can use the lever principle to realize a labor-saving operation, thereby reducing the burden on workers during an operation process, and reducing the labor intensity; in addition, the sand lifting effect is optimized, such that sand mixing is more uniform, thereby improving the working efficiency.

The application belongs to the technical field of aero-engines, and particularly relates to a device and method for measuring the resistance force of a motion mechanism of an aero-engine under a load condition, a method and process for measuring the resistance force of the motion mechanism of the aero-engine under the load condition are provided, a device for measuring the resistance force under the load condition is designed, the resistance force of the motion mechanism of the aero-engine is more truly mastered, the design input of rigid-flex coupling dynamics analysis of the motion mechanism is provided, the adjustment precision of the motion mechanism is more accurately obtained, and the structure improvement design is guided, and the safety and reliability of the aero-engine are improved.

This invention discloses a method for calculating and constructing the limit value of the height increase of the bearing pad stone in bridge jacking, including the following steps: determining the temperature force and braking force on the bearing, comparing them with the frictional resistance, and taking the smaller of the two as the bearing frictional force; calculating the bearing reaction force under the lane load, and calculating the critical bending moment when the minimum pressure at the interface between the old and new pad stones is 0; calculating the height h of the pad stone height increase limit value based on the obtained bearing frictional force and the obtained critical bending moment; and adopting different construction methods based on the height h of the pad stone height increase limit value. This invention is reasonably designed, provides a scientific theoretical basis for bridge jacking schemes, ensures the safety and stability of the bridge structure, improves the safety of the construction process, provides a theoretical basis for the modification method of increasing the bearing pad stone in bridge jacking, clarifies the applicable scope of the method, improves the construction safety during the bridge jacking process, and ensures the stability of the structure after jacking.

This utility model relates to the field of drawbridge technology, specifically a drawbridge with reduced friction, comprising: a headframe on which a drawbridge body is mounted; an installation groove is formed on the inner wall of the drawbridge body, a locking block is integrally formed on the inner wall of the installation groove, an installation strip is slidably mounted inside the installation groove, an arc groove is formed on the bottom surface of the installation strip, a locking groove is formed on the side wall of the installation strip, and installation holes are formed on the surface of the drawbridge body; a guide wheel structure is mounted on the drawbridge body, the guide wheel structure including bolts. This utility model reduces the weight of the guide wheel by creating slots inside the rotating shaft and the guide wheel disc, and further reduces the resistance of the guide wheel disc during rotation by rotatably connecting the rotating shaft to the fixed shaft via bearings. This allows the guide wheel disc to rotate quickly when the material is transmitted across its surface, reducing friction on the material and ensuring a better user experience.

The application belongs to the technical field of slide rail devices, and the hidden slide rail device is characterized in that when the external guide rail is relatively retracted, the guide on the supporting piece can accurately guide the swing cam to swing and enter the clamping groove, and when the swing cam swings to the top supporting limiting part, the swing cam is limited in the lifting state, so that the external guide rail and the gravity carried thereby are transferred from the first sliding connection structure to the top supporting assembly, the first sliding connection structure and other moving parts are free from pressure in the long-term static bearing state, and the sinking, creep, wear caused by the static load and the increased movement resistance, increased noise and decreased smoothness caused thereby are effectively avoided; when the external guide rail is relatively slid out, the supporting piece directly drives the swing cam to reversely swing and is limited in the sliding-out limiting part, the swing cam is lowered and separated from the clamping groove, the gravity is transferred back to the first sliding connection structure, and the time-sharing switching of the static bearing and the dynamic movement is realized.

The utility model belongs to the field of shield machine cutter design device, concretely relates to a low resistance cambered surface design device of high -efficient shield machine cutter, has solved the cambered surface design device of current shield machine cutter in prior art, is inconvenient to the resistance test of cutter, reduces the problem of shield machine cutter design efficiency, including the bottom plate, the upper surface fixed connection of bottom plate has the support seat, the upper surface fixed connection of support seat has the fixed plate, the upper surface mounting of fixed plate has the hydraulic rod, the output of hydraulic rod installs pressure sensor, the left side surface mounting of pressure sensor has the fixed frame, the front surface fixed connection of fixed frame has the fixed frame, the front surface mounting of fixed frame has the speed -reducing motor, the output of speed -reducing motor installs the rotating bearing, the inboard wall mounting of fixed frame has the bearing seat, the inside mounting of fixed frame has the cambered surface cutter, the upper surface fixed connection of bottom plate has the fixed seat.

This application discloses a fracture-resistant tensile clamp for a push-pull force gauge, comprising a base, a force gauge, and a clamp. The force gauge is fixed on the base, and the clamp is used to hold the product under test. The base has a slide rail cavity, in which a slider is slidably fitted, and the slider is rigidly connected to the clamp. The slide rail cavity is filled with a non-Newtonian fluid, and the slider has a fluid shear structure. The fluid shear structure causes the non-Newtonian fluid in the slide rail cavity to generate velocity-related flow resistance when the slider moves. The slide rail cavity includes a main working cavity and a secondary compensation cavity that are interconnected, and a fluid channel is provided between the two cavities. This fracture-resistant tensile clamp for a push-pull force gauge, through the buffering effect of the non-Newtonian fluid and the shear structure, combined with the main and secondary cavity structure of the slide rail cavity, can effectively protect the clamp and equipment under various actual testing conditions, especially when facing sudden tensile impacts. It also has good compatibility with the tested products, and has significant practical value and promotional significance.

The utility model discloses a kind of flange special connecting structure suitable for special-shaped pipeline, belong to special-shaped pipeline flange connection technical field, including bolt and nut, further including limiting mechanism, the limiting mechanism includes the swivel block being located at bolt and nut end part, the surface of the swivel block is equipped with fixed frame, the inner wall slidingly connected of the fixed frame has resistance rod, the surface of the resistance rod is connected to the inner wall of swivel block. Through the above-mentioned mode, by bolt and nut mutual cooperation, special-shaped pipe and valve body are stably connected, by multiple swivel blocks respectively to the one end of bolt and nut is blocked, by resistance rod and stop block mutual cooperation, and then the swivel block is locked, compared with the looseness of valve body and pipeline connection in the fluid flow of existing, the present mode is blocked stably by bolt and nut, ensure that fluid in flow, valve body and special-shaped pipe connection place is stable.

An electric locking structure for a resistance motor of an exercise machine, includes a frame; a resistance motor having an output shaft for outputting a resistance force; a rotary disk connected to the output shaft; a locking disk connected to the output shaft and having a plurality of locking spaces; a traction member for pulling the rotary disk to overcome the resistance force; a locking bolt, movably disposed on the frame; an electric control unit, connected to the locking bolt; and a power storage unit, electrically connected to the electric control unit. The electric locking structure can prevent the traction member from being pulled out arbitrarily and not being able to be retracted.

Provided is a structure mounted on a moving body, the structure being provided with a first member and a second member, the first member and the second member being joined to each other by snap-fitting, either the first member or the second member having a fulcrum portion, and the fulcrum portion having a pivot portion, and the first member and the second member having a pivot portion. Either the first member or the second member has a resistance acting point portion, and is formed such that the engagement between the first member and the second member can be released by bringing a part of a tool into contact with the fulcrum portion, bringing one end of the tool into contact with the resistance acting point portion, and applying an external force to the tool.

The application provides a jacking force calculation method and system for a rectangular jacking pipe, comprising the following steps: S1: obtaining the rectangular jacking pipe, performing axial partition on the pipe section of the rectangular jacking pipe to obtain pipe section axial partitions; performing radial partition on the pipe section of the rectangular jacking pipe to obtain pipe section radial partitions; S2: according to different pipe section axial partitions and pipe section radial partitions, calculating the pipe circumference friction of each pipe section axial partition; S3: according to the Terzaghi theory, calculating the frontal resistance of the pipe end of the rectangular jacking pipe; S4: through the frontal resistance of the pipe end of the rectangular jacking pipe and the pipe circumference friction of each pipe section axial partition, calculating the jacking force of each pipe section axial partition. The application adopts an effective stress to calculate the jacking force, and considers the axial and radial partition of the pipe section and the calculation of the jacking force by using the corresponding friction coefficient, so that the calculation result of the jacking force is more consistent with the actual situation, and it is of great significance to reasonably predict the jacking force and guide the field construction.

The pusher device with a safety release (100) comprises a movement element (2), for moving, alternatingly along a guide element (11), a support element (10) of an abutment element (1) which is configured so as to abut a product, an article or a part of an article which is to be moved. The movement element (2) and the support element (10) of the abutment element (1) are reciprocally coupled by means of a releasable coupling system (4) and are reciprocally arranged in such a way that the movement element (2), when activated linearly from the first retracted position to the second advanced position, exerts a pulling action on the support element (10) in order to pull the support element (10). The releasable coupling system (4) is realised and configured in such a way as to maintain the support element (10) of the abutment element (1) coupled to the movement element (2) with a coupling force having a predetermined value and is configured in such a way as to enable a decoupling of the support element (10) from the movement element (2) when the abutment element (1), encounters a resistant force that is greater than the coupling force of predetermined value, thus achieving a safety release of the support element (10) from the movement element (2) and therefore a stop of the movement of the abutment element (1).