3058 results about "Pull force" patented technology

The invention relates to the technical field of machine tool cross beams, in particular to a numerical control gantry machine tool cross beam anti-deformation device which comprises a cross beam, two symmetrically-distributed top connecting pieces are rotationally installed at the top of an inner cavity of the cross beam, and two symmetrically-distributed bottom connecting pieces are rotationally installed at the bottom of the inner cavity of the cross beam. The distance between the two bottom connecting pieces is smaller than that between the two top connecting pieces, tensioning assemblies with adjustable tightness are installed between the bottom connecting pieces and the adjacent top connecting pieces, the two top connecting pieces are located at the two ends of the cross beam, and the two bottom connecting pieces are located in the middle of the cross beam. According to the invention, through the top connecting piece, the bottom connecting piece and the tensioning assembly, an obliquely upward pulling force is applied to the cross beam, the pulling force is decomposed into a vertically upward force and a horizontal force, and the vertical force can offset the gravity of the middle part of the cross beam, so that the downward bending deformation of the cross beam is reduced, and the purpose of reversible deformation is achieved.

The invention provides a rotary table bearing-torque motor thermal vibration coupling modeling method, and relates to the technical field of machine tool reliability analysis. Comprising the steps of calculating bearing restoring force, torque and elastic rigidity; giving a dynamic balance equation of the main shaft system; unbalanced magnetic pulling force and unbalanced mass excitation are calculated; a displacement field is solved, and load changes caused by the displacement field are transmitted to the thermal model; the contact force borne by the bearing is updated by considering the load effect related to displacement, and the friction heat generation of the bearing and the heat generation of each part of the motor are calculated; calculating thermal deformation and thermal displacement of the bearing; thermal resistance among nodes is calculated, and a temperature field equilibrium equation is given through a thermal resistance network to achieve rapid thermal-mechanical coupling analysis; the thermal equilibrium equation is solved to calculate temperature response; importing the latest temperature into the kinetic model; lubricating grease viscosity and bearing thermal deformation are updated; and repeating the steps to finally obtain the main shaft displacement field and temperature field response. The method is high in accuracy, high in universality, low in test cost and high in test efficiency.

The invention relates to the technical field of insertion and extraction force testing, and discloses a detection device and method for automobile exterior trimming part assembling, and the device comprises a bottom frame, a tension testing assembly, a vibration mechanism, and an extrusion mechanism, the vibration mechanism comprises a gear-missing column, a moving plate, a first electric push rod, a placing plate, and a vibration spring, and the bottom frame is provided with a sliding groove. The moving plate is slidably connected into the sliding groove, the first electric push rod is fixedly installed in the sliding groove, the output end of the first electric push rod is fixedly connected with the side wall of one end of the moving plate, one end of the vibration spring is fixedly connected to the bottom frame, the placing plate is fixedly connected to the other end of the vibration spring, and a mounting block is arranged on the bottom frame. According to the device, the vibration mechanism and the extrusion mechanism are matched, so that the bumper support on the placement plate continuously shakes, various road surface vibrations borne by an automobile in the driving process are simulated, and the reliability of the buckle under long-term vibration is accurately evaluated.

The invention relates to the technical field of six-dimensional force sensor calibration, in particular to a high-precision six-dimensional force sensor calibration device and calibration method. The invention provides a high-precision six-dimensional force sensor calibration device which comprises a base, a calibration platform, a cross force application frame, an S-shaped tension sensor and a fixed pulley. The calibration platform is arranged on the base and is used for fixing the six-dimensional force sensor; the center point of the cross force application frame is connected to the six-dimensional force sensor, a plurality of fixed pulleys are arranged on the calibration platform, a plurality of S-shaped tension sensors are arranged on the cross force application frame, and loads are applied to the S-shaped tension sensors or directly applied to the cross force application frame through connection of a weight set and a rope and guidance of the fixed pulleys. Therefore, a single-dimensional force, a single-dimensional torque, a composite force or a composite torque is applied to the six-dimensional force sensor. Accurate loading of the six-dimensional force sensor is achieved, the device is simple in structure and convenient to operate, independent calibration of single-dimensional force / torque can be achieved, and combined loading can also be conducted.

The invention relates to the technical field of chip welding strength detection, and discloses a welding wire push-pull force detection machine and a detection method for welding wire push-pull force, the welding wire push-pull force detection machine comprises a rack, a test bin, a clamp, a test disc, a speed reduction control mechanism and an elastic force reversing transmission mechanism, the test bin can vertically ascend and descend relative to the rack, and the clamp can horizontally move relative to the rack; the test disc and the speed reduction control mechanism are both mounted in the test bin; according to the welding wire push-pull force detection machine, through cooperation of the speed reduction control mechanism and the elastic force reversing transmission mechanism, when the test bin moves downwards, the contact plate firstly makes contact with the clamp, and the induction assembly monitors the position of the contact plate so as to reduce the descending speed of the test bin; the lever pushes the reset spring to stretch to the maximum length and then automatically shrinks, and the contact plate is pulled to move upwards to be separated from the clamp. An additional control structure is not needed, the contact plate is prevented from hindering detection, the problem that the testing head moves downwards rapidly and is prone to collision is solved, and smooth detection is guaranteed.

The invention discloses a concrete cantilever structure pull-up formwork construction method which is characterized by comprising the following steps: load calculation and component model selection; pre-burying the U-shaped bolts; pre-burying the upper-section pull rod; i-shaped steel end connecting plates are welded, and double-layer angle steel connecting plates are welded to the cantilever ends of the I-shaped steel; i-shaped steel cantilever girders are installed; assembling a pull rod system; the pull rods are fastened and leveled with a system, the two pull rods are synchronously fastened, the double rods are ensured to simultaneously advance and retreat during adjustment of an adjusting device, and a level gauge is used for observation and leveling after initial adjustment; the formwork frame and the safety enclosure are installed; pull rod pre-tensioning and deflection monitoring are carried out, pre-tension force is applied through an adjusting device, the deflection of the cantilever end is detected, monitoring points are arranged, and a deformation early warning mechanism is established; regulating and controlling concrete pouring; and removing the mold and recycling. The overhanging structure is high in anti-overturning capacity and suitable for large-span and special-shaped overhanging structures, and the safety is remarkably improved.

The utility model provides a test device for a ceiling clothes airing machine. The test device comprises a rack; the left test pull rope is used as a test pull rope for providing vertical upward pulling force for the first airing rod steel wire rope; the right test pull rope is used as a test pull rope for providing vertical upward pulling force for the second airing rod steel wire rope; the two ends of the cross rod are detachably connected with the wire outlet tail end of the first airing rod steel wire rope and the wire outlet tail end of the second airing rod steel wire rope respectively during testing; the two end parts of the cross rod are fixedly connected with one end part of the left test pull rope and one end part of the right test pull rope respectively; the pre-mounting piece device is used for providing vertically upward pulling force for the cross rod through the gravity of the pre-mounting piece device; the weighted mounting piece device is used for carrying out load pressing on the pre-mounting piece device during testing; and the lifting assembly is used for lifting and lifting the weight-increasing mounting piece device. According to the utility model, the steel wire rope of the suspended ceiling clothes airing machine can be accurately and efficiently detected in a load-bearing state in a manpower-saving manner.

The utility model relates to the technical field of well drilling coring, and discloses an elastic self-driven pressure maintaining coring tool which comprises a shell, a coring drill bit is fixedly arranged at the front end of the shell, an inner barrel and a coring assembly are sequentially and coaxially arranged in the shell, the rear end of the inner barrel is closed and fixedly connected with the shell, and a pressure maintaining device is arranged at the front end of the inner barrel. The coring assembly comprises a main spring, a positioning cylinder, a coring cylinder, a footage rod and a locking device, the main spring is used for providing pulling force towards the rear end of the inner cylinder for the positioning cylinder, one end of the coring cylinder is rotatably connected with the front end of the positioning cylinder, and the locking device is used for limiting the positioning cylinder to move towards the rear end of the inner cylinder; the footage rod penetrates through the front end of the positioning cylinder and is in sliding connection with the positioning cylinder, the footage rod is matched with the locking device, and when the footage rod slides towards the rear end of the positioning cylinder, limiting of the locking device to the position between the positioning cylinder and the inner cylinder can be relieved; according to the tool, the coring barrel can automatically return to the inner barrel when the footage is in place, and pressure-maintaining and fidelity coring of a deep rock stratum can be achieved.

The invention belongs to the technical field of cable installation, and particularly relates to a cable installation suspension device which comprises an installation plate, an installation mechanism is fixed to the rear side of the installation plate, a telescopic adjusting mechanism is fixed to the front side of the installation plate, a transverse plate is fixed to the lower end of the telescopic adjusting mechanism, and evenly-distributed insertion grooves are formed in the lower side of the transverse plate. The device comprises a fixing rod, a U-shaped block, a first guide wheel, an insertion plate and a second guide wheel, the left end and the right end of the fixing rod are provided with an insertion groove, a limiting plate is inserted into the insertion groove, cavities are formed in the upper ends of the left side and the right side of the limiting plate correspondingly, and limiting mechanisms are arranged in the cavities correspondingly. A limiting rod, a limiting block, a first spring, a fixing rod, a U-shaped block, a first guide wheel, an insertion plate and a second guide wheel are fixed to the front side of the limiting plate in a matched mode; in the using process, when the cable is subjected to pulling force, external force is buffered through the first spring, so that the buffering effect of the cable is improved, the cable is prevented from being damaged due to pulling, and the service life of the cable is prolonged.

The utility model relates to the technical field of workpiece clamping, and provides a clamping system and a machine tool, and the clamping system comprises a main shell, a rotating main body, a driving motor, a first bearing and a second bearing. Wherein an accommodating space is formed in the main shell; the rotating main body is rotationally arranged in the accommodating space along the axial direction of the rotating main body; the driving motor is connected with the rotating main body; the first bearing and the second bearing are both arranged on the rotating body in a sleeving mode. According to the clamping system, the first bearing and the second bearing are arranged between the rotating body and the main shell to support the main shell in a matched mode, so that the main shell and the rotating body can be connected into a whole and can rotate, it is guaranteed that all structural components do not affect each other when the system works, the structure of the clamping system is simplified, and the working efficiency is improved. The dependence on the technical level of installation personnel is reduced, and the maintenance difficulty is reduced; and the first bearing and the second bearing are arranged between the rotating main body and the main shell, so that the bearings can be prevented from being damaged under the action of pulling force.

The invention discloses a quality detection device for a steel structure frame, and belongs to the technical field of quality detection, the quality detection device comprises a tension testing machine, and also comprises a support plate arranged on the tension testing machine; the feeding mechanism is arranged above the supporting plate and is used for feeding the sample; the moving mechanism is connected with the supporting plate, and a locking mechanism is connected to the moving mechanism; the moving mechanism is used for driving the locking mechanism and the sample to horizontally move, and the locking mechanism is used for clamping or loosening the sample under the moving cooperation of the moving mechanism; according to the scheme, only the sample needs to be placed in the feeding mechanism, the sample is automatically clamped and fixed and is subsequently released and unloaded in the process of driving the locking mechanism to move through the moving mechanism, the automation degree is high, manual active operation is not needed, the operation difficulty is reduced, a large amount of labor force and time are saved, and the working efficiency is improved. The detection efficiency is obviously improved, the subsequent detection work is facilitated, and the practicability is relatively high.

This invention provides a testing device and method for corrosion and wear testing of sliding guide rails under corrosive environments. The device includes a support module, a drive module, a guide rail, a test slider, a tension sensor, a pull rod, and a test tank module. The test slider is slidably mounted on the guide rail and contains a counterweight to simulate a load. The drive module drives the pull rod to slide along the length of the guide rail. The tension sensor is connected between the pull rod and the test slider. The test tank module holds the test solution to simulate a corrosive environment. This invention features a compact overall structure, simple component installation, and a simple slider force transmission method. It can realistically simulate the corrosion and wear phenomena of the sliding guide rail moving pair under seawater conditions. Furthermore, the adjustable counterweight and replaceable test solution enable this invention to conduct corrosion and wear tests on moving pairs under different load conditions and corrosive environments.

A device (1) for holding and / or moving a rod-shaped body (2) is proposed, comprising: a fully enclosed housing (3) with a longitudinal axis (L) along which the rod-shaped body (2) is guided or is to be guided; a thrust piston (4) surrounding the rod-shaped body (2), which can be subjected to a first pressure from the outside via a first pressure port (L) through the housing (3) and which can be subjected to a second pressure from the outside via a second pressure port (K) through the housing (3), and which has a first effective surface (5) and a second effective surface (6), which effective surfaces (5, 6) preferably extend in a radial direction, wherein the first effective surface (5) is in fluidic operative connection with the first pressure port (L) and the second effective surface (6) is in fluidic operative connection with the second pressure port (K), wherein the thrust piston (4) has a radially internal recess (7) through which a circumferential free space (8) is formed between the rod-shaped body (2) and an inner surface (9) of the thrust piston (4), which free space (8) has an axial limit (10, 11) on both sides; and at least one clamping sleeve (12) which, with its inner surface (13), defines a central cylindrical area through which the rod-shaped body (2) is guided or can be guided, and which is received in the aforementioned free space (8), extending axially between the two axial limits (10, 11), wherein the clamping sleeve (12) can be subjected to a third pressure from the outside via a third pressure port (V) through the force-pull piston (4) and is designed to deform itself reversibly radially inwards according to the third pressure and to exert a holding force on the rod-shaped body (2).

The utility model discloses a filling machine for cleaning agents, which relates to the technical field of filling machines and comprises a working platform, a conveying belt for conveying bottle bodies is arranged at the top end of the working platform, and a lifting seat for controlling an adjusting mechanism to integrally and vertically move is mounted on the outer wall of the working platform. The adjusting mechanism is arranged on the lifting seat and the working platform; the adjusting mechanism comprises a transmission unit and a limiting unit; the transmission unit is used for adjusting the distance between the filling heads. Through the arrangement of the adjusting mechanism, when the distance between the filling heads needs to be adjusted, outward pulling force is applied to the limiting rods, so that movement limiting of the axial movable plate and the vertical movable plate is relieved; and the vertical movable plate moves downwards to drive the filling heads to be far away from each other or close to each other through the guide rods and the guide grooves, so that the filling heads are moved to the positions above the bottle bodies, and the working efficiency is further improved.

The invention relates to the technical field of material mechanical property testing, and discloses a composite steel wire tension test method which comprises the following steps: executing a micro-unloading and reloading action at each increment end point of stepping loading, and synchronously calculating to obtain instantaneous system rigidity Ki, dissipated energy Wd and system rigidity change rate K based on force displacement data of the action, according to the method, through a set of built-in judgment rules, firstly, the K value is used for filtering measurement artifacts generated by slippage of the clamp, then the damage inflection point is identified according to irreversible decline of the Ki value, and the physical property of the damage is discriminated in combination with two-dimensional state data of Ki and Wd, so that the traditional one-way destructive test is changed into the traditional one-way destructive test. The method is converted into a staged failure analysis process capable of performing online diagnosis, and provides a direct physical observation window for distinguishing functional damage and structural damage of the material, so that the depth and credibility of information acquisition of the tension test are improved.

The invention discloses a synchronous motor modular excitation active vibration suppression method for eccentric vibration, and the method comprises the steps: dividing a rotor excitation winding into 2P independent current control excitation modules in the circumferential direction, and respectively arranging an X-direction displacement probe and a Y-direction displacement probe, obtaining a first displacement signal and a second displacement signal of the rotor mass center relative to the stator and a rotor mechanical angular speed; performing band-pass filtering on the first displacement signal and the second displacement signal, and extracting a first displacement first-order component and a second displacement first-order component; calculating the shortest air gap direction angle and the eccentricity amplitude under the stator coordinate system, calculating the eccentricity, and calculating a first-order eccentricity coefficient; calculating a shortest air gap direction angle under a rotor coordinate system, and calculating an equivalent correction coefficient; and according to the equivalent correction coefficient, the first-order eccentricity coefficient, and the shortest air gap direction angle and the mechanical position angle under the rotor coordinate system, the injection amount of each excitation module is calculated, an excitation current instruction is generated and output to the corresponding excitation module, and active suppression of the unbalanced magnetic pulling force is realized.

The utility model belongs to the technical field of cutter clamping, and particularly relates to a cutter positioning and clamping device which comprises a grinding assembly, a grinding table is arranged at the bottom of the grinding assembly, the grinding assembly is connected with the grinding table in a sliding mode, a clamping and positioning base assembly is arranged on one side of the grinding table, and a clamping and positioning assembly is arranged on the top of the clamping and positioning base assembly. The clamping and positioning assembly comprises a clamping sliding seat. Through the design of the vertical limiting assembly, when angle adjustment of the turning tool is finished every time, the movable joint of the support can be automatically limited, and the situation that due to forgetting, the position of the turning tool and the position of the support are changed together through a grinding machine in the grinding process is avoided; by means of the design of the sliding disc, pulling force can be converted into pressing force gripping force when the angle of the turning tool is adjusted, and therefore the angle of the turning tool is adjusted by rotating the limiting round wheel with the supporting ring as the fulcrum, and operation is more convenient.

The utility model discloses a push-pull force detection device, which comprises a push-pull force meter and a test platform connected with the push-pull force meter, and is characterized in that the test platform comprises a base, a push-pull force sensor and a detection device, the transmission mechanism comprises a transmission lead screw and a transmission sliding block arranged on the transmission lead screw in a sleeving mode, and the transmission sliding block conducts linear reciprocating motion in the axial direction of the transmission lead screw. The driving mechanism is connected with the transmission screw rod and drives the transmission screw rod to rotate; the clamping mechanism is used for clamping a to-be-tested product and comprises a first clamping assembly and a second clamping assembly, the first clamping assembly is connected with the transmission sliding block, and the second clamping assembly is connected with the pull and push dynamometer; the first clamping assembly and the second clamping assembly are oppositely arranged in the axial direction of the transmission lead screw. And the height adjusting mechanism is connected with the pull and push dynamometer to drive the pull and push dynamometer to move along the vertical direction. Through the arrangement of the height adjusting mechanism, the height of the pull and push dynamometer is adjusted, so that the height of the second clamping assembly is adjustable, the levelness of a product to be measured is kept, and the accuracy of drawing force measurement is improved.

The invention relates to the technical field of automobile cable connectors, and particularly discloses an automobile connector with good tensile resistance, which comprises a first connecting terminal and a second connecting terminal which are mutually plugged, a floating cavity is arranged in the first connecting terminal, and an inner sliding seat connected with a cable and a rotating sleeve sleeved outside the inner sliding seat are arranged in the cavity; the inner sliding seat is provided with a guide chute, and the rotating sleeve is provided with a guide sliding block and a locking convex part. The inner sliding seat is pulled to slide to drive the rotating sleeve to rotate, so that the locking convex part rotates to the inner side of the cantilever spring bolt to form rigid abutting, a deformation space is filled, cable drawing force is actively converted into rotating locking force, the effect that the larger the pulling force is, the more stable the locking is achieved, ratchet wheel non-return and cable linkage protection are matched, and the locking effect is better. And the problems that the connector accidentally falls off and the cable is broken and fails under extreme working conditions are effectively solved.

The invention relates to the technical field of ground stress testing, in particular to anchor rod equipment for testing ground stress of an underground chamber, an anchoring body is arranged at the bottom of an anchor hole, and anchoring surfaces are arranged on two opposite sides of the anchoring body so as to directionally extrude surrounding rock outside the chamber through the anchoring surfaces to obtain anchoring stress of the chamber in a set direction; the two ends of the anchor rod are connected with the anchoring body and the load piece through threaded connection structures correspondingly. The loading part is arranged at the hole opening of the anchor hole, the drawing device and the stress meter are arranged between the loading part and the hole opening of the anchor hole, the anchoring faces are arranged on the two sides of the anchoring body, the interaction between the anchor rod and the surrounding rock when the anchor rod is drawn in the rock mass is converted into different drawing forces, and then the ground stress of the surrounding rock of the chamber in a certain direction can be obtained. Therefore, the ground stress direction and size of the surrounding rock of the underground chamber are tested.

The invention discloses a suspension bridge pin shaft fork ear connecting piece load-wear fatigue test device, which comprises a lever prying force application device, a fatigue test device and a fatigue test device, comprising a lever prying support, a fork-shaped lug plate force application plate arranged at the top end of the lever prying support, and a force transmission lever arranged below the fork-shaped lug plate force application plate to drive the fork-shaped lug plate force application plate to move up and down. The torque force application device is used for providing torque, enabling the fork-shaped lug plate to be in close contact with the box girder lug plate and simulating an actual back-twist phenomenon, and comprises an upper layer mechanism and a lower layer mechanism which rotate relatively, and a high-strength torsion spring and a torque sensor which are buckled inside by the upper layer mechanism and the lower layer mechanism; the abrasion sliding device is arranged at the bottom of the lever prying support and connected with the bottom of the torque force application device, and the operation state of the fork-shaped lug plate in an actual structure is simulated, so that the fork-shaped lug plate generates back-twist abrasion damage. According to the invention, a large tonnage, namely the stress state of the connecting piece under an actual bridge load, can be fully simulated through a test, and fatigue test evaluation after wear damage is carried out on the connecting piece.

The invention relates to the technical field of optical transceivers, and discloses an interface connection mechanism of an optical transceiver and a use method thereof.The interface connection mechanism comprises a shell, and a plurality of first sliding grooves are formed in the side wall of the shell. At the moment, the diameter of the cable is slightly larger than the inner diameter of the L-shaped groove, certain extrusion exists between the outer skin of the cable and the inner wall of the L-shaped groove, and the second limiting block and the third limiting block can prevent the cable from sliding out after being pulled after entering the L-shaped groove. At the moment, the pulling force or the extruding force, in all directions, borne by the cable can be converted into the pressure and the friction force between the side wall of the cable and the side wall of the L-shaped groove in the first limiting block to a certain extent; and the loosening of the connection between the joint and the interface and the loosening of the welding point between the interface and the circuit board caused by the pulling force and the shaking of the cable close to the interface can be effectively reduced.

The invention discloses a suspension type porcelain insulator detection method and equipment for detection of the method, and relates to the technical field of insulator detection, the suspension type porcelain insulator detection equipment comprises a mounting table, one end of a positioning block is provided with a distance adjusting traction piece connected with a movable guide block, and the other end of a tension sensor is provided with a bending detection piece connected with the distance adjusting traction piece. According to the suspension type porcelain insulator bending detection device, the bending detection part is arranged, the telescopic air cylinder is started, the positioning rod swings relative to the positioning block through extension of the inclined connecting rod, so that the suspension type porcelain insulator is bent, and when the telescopic air cylinder contracts, an aqueous solution in a second piston barrel can be extracted through cooperation of a first piston barrel and a first piston rod; the worm drives the worm gear to rotate, so that the mounting base can drive the suspension type porcelain insulator to rotate, the suspension type porcelain insulator is bent in different directions through repeated stretching and retracting of the telescopic air cylinder, and the accuracy of detection data is improved.

The invention relates to a large-span beam arching structure device and an arching method, and the device comprises a supporting device which is arranged at the middle position of a bottom span of a beam body; the jacking arching device is used for applying jacking force to the beam body by taking the midspan center line of the beam body as a symmetry axis and is mounted on the supporting device; and the cable-stayed pull-down device is used for synchronously applying downward and inward component forces to the two sides of the beam body while applying the jacking force along with the jacking arching device so as to form the required arching radian. According to the device, the pull-down device is directly connected with the jacking device, pull-down is automatically achieved in the jacking process, the force flow path is clear, the risk that independent operation is asynchronous is effectively solved, and arching arcs are controlled more accurately and efficiently; downward and inward constraining force is provided in a cable-stayed mode, lateral instability or distortion possibly occurring in the jacking process of a beam body can be effectively restrained, and the safety of the construction process is improved.

The invention pertains to a fitness device comprising a resistance resource; a winding reel; a rally rope; a rotating member coaxially connecting to the winding reel, one end of the rally rope connecting to the winding reel, the other end cooperates with the pulling action of a user, the resistance source drives the winding reel to rotate so that the rally rope is wound to generate counterweight tension by outputting torque from the rotating member; a first support member limiting the resistance source on an external object, a linkage clutching mechanism for separating or linking the rotating members or the winding reels. The winding reels driven by two adjacent resistance sources are connected via the spline shaft, drives the resistance sources to rotate synchronously to increase torque, reduces production costs, improves the applicability of the fitness device, and makes it energy-saving and environmentally friendly.

The utility model discloses an electric push rod which comprises a motor and a transmission mechanism. The screw rod is driven by the transmission mechanism to rotate, and the tubular telescopic component is driven by the rotation of the screw rod to do linear telescopic motion; the controller is used for controlling the motor; the electric push rod further comprises a clutch which is connected between the transmission mechanism and the lead screw and has a joint state used for keeping power transmission of the transmission mechanism and the lead screw and a separation state used for cutting off the power transmission of the transmission mechanism and the lead screw, and the lead screw is subjected to axial tension to enable the clutch to be switched into the separation state. And the Hall sensor is electrically connected to the controller and is used for detecting the rotary motion of the screw rod. When an object or a human body is clamped, the tubular telescopic component is prevented from clamping an obstacle again in a mode that the tubular telescopic component stops retracting and retreats, so that the safety is higher.

A bicycle includes a suspension system of the rear wheel, where the crankset and the hub and sprocket each include at least one chainring engaged by the chain and a rotation shaft. A compensation device is interposed between the toothed plate and the shaft to allow an angular compensation stroke between them from a rest position corresponding to the absence of the pulling of the chain, to a compensation position, corresponding to a pulling action of the chain generated by the rear suspension. The compensation device includes a plurality of pairs of brake elements and respective compensation end elements where at least one shock-absorbing element is operationally interposed between at least one pair capable of deforming only in correspondence with a final portion of the compensations stroke and between at least another pair where at least one limiting element is interposed to limit the maximum deformation of the shock-absorbing element.

The utility model discloses a reinforcement cage bar winding machine with adjustable bar winding tension, which relates to the technical field of bar winding machines, and comprises a wire releasing trolley, a bar winding machine and a wire releasing mechanism, the bar winding machine comprises a fixed frame, a rotating mechanism, a supporting mechanism and a telescopic mechanism, the rotating mechanism and the telescopic mechanism comprise a first assembling seat and a second assembling seat; the wire releasing vehicle is provided with a roller, a wire releasing disc and a wire releasing roller; the wire releasing mechanism comprises a telescopic rod, and a wire releasing cylinder is mounted on the telescopic rod; the tension adjusting mechanism comprises a wire placing box and an adjusting frame, a wear-resistant block is arranged in the wire placing box, and the adjusting frame is provided with an adjusting screw rod. The position of the center hole in the wear-resistant block is changed by rotating the adjusting screw rod to adjust the winding tension of the rib winding wire, the operation is simple and convenient, and the production efficiency and the product quality are improved.

The invention discloses a drill rod tension type vertical shaft tunneling process which comprises the following steps: constructing a pilot shaft into a stratum by utilizing a raise boring machine, constructing a starting shaft, sequentially hoisting a tunneling machine and a hanging scaffold system into the starting shaft by utilizing hoisting equipment, and driving a tension drill rod to sequentially penetrate through the hanging scaffold system and the tunneling machine by utilizing the raise boring machine, and the tunneling machine continues to be lowered into the lower horizontal roadway and is fixed through the drill rod tensioning device, the tunneling machine starts to conduct tunneling circulating operation downwards along the tension drill rod through the stepping mechanism, and the hanging scaffold system conducts well wall supporting circulating operation downwards along the tension drill rod through the stepping mechanism till the tunneling machine conducts tunneling to the lower horizontal roadway. The tension drill rod serves as a main fixing structure and can bear the weight of the heading machine, the rock breaking positive pressure and the weight of the hanging scaffold, and the heading effect is supported not to be affected and limited by the stratum; the tension drill rod provides guidance, and the tunneling machine is guided on a correct tunneling path in real time, so that the construction efficiency and the tunneling well completion quality are improved.