85 results about "Manual traction" patented technology

The invention discloses a force control traction and swinging multi-degree-of-freedom mechanical arm control device and method. A force signal sensor is mounted on a flange plate at the tail end of a mechanical arm in a specific mode by a mounting connector, and the pose information and force / moment information of the tail end of the mechanical arm are sampled synchronously. Based on feedback control of external action force, force feedback information is converted into pose offset information of the tail end of the mechanical arm. The pose and speed of the tail end of the mechanical arm are changed along with the external action force through a force-pose offset control algorithm and a force-speed control algorithm, and accurate swinging can be achieved when manual traction is stopped. According to the force control traction and swinging multi-degree-of-freedom mechanical arm control device and method, a tail end tool can achieve traction operation conveniently in real time according to the will of an operator, the current pose can be kept without external force action, and accurate positioning is achieved; meanwhile, the operator can change the motion trail of the tail end of the mechanical arm by exerting external force in the process that the mechanical arm moves to a target spot, and the mechanical arm can achieve emergent obstacle avoidance in the movement process.

The invention discloses a prestress steel strand penetrating device, comprising a steel strand restraint ring; the prestress steel strand penetrating device is characterized in that: the device also comprises a self-anchored hauling core rod and an anchor piece; the self-anchored hauling core rod is composed of a conical rod and a column; bunched steel strands which are wrapped with the self-anchored hauling core rod are sheathed in the steel strand restraint ring, the anchor piece is wedged in a gap of the bunched steel strands to lead the bunched steel strands to be extruded and tightened and to be closely attached to the inner wall of the steel strand restraint ring, and the self-anchored hauling core rod is fixed on a steel wire which penetrates out of a clamping ring mounting hole with a manual traction method in advance and is located by the hauling of a winding engine. As a winding engine electrical device can be controlled accurately, thereby being beneficial to installation ofpost-tensioned prestressing tendon and ensuring construction safety. The device has strong adaptbilitym convenient construction, high operating efficiency and high stability under the strand prickingconstruction of prestressing tendons with different structure and type. The device is not only suitable for strand pricking construction of the prestressing tendon of a prestressing hole of a plasticcorrugated pipe, but also is suitable for strand pricking construction of the prestressing tendon of the prestressing hole of a steel corrugated pipe.

The invention discloses an optical fiber hoisting and laying device. The optical fiber hoisting and laying device comprises a tool base, a scissor fork type lifting table, a laying winding mechanism and a traction mechanism, the scissor fork type lifting table is arranged on the right side of the tool base, the laying winding mechanism is arranged on the left side of the scissor fork type liftingtable, the traction mechanism is arranged on the left side of a guardrail, the traction mechanism comprises a guide plate, the guide plate is vertically arranged, and a mounting plate is perpendicularly and fixedly connected with the bottom of the guide plate. According to the optical fiber hoisting and laying device, a guide ring and a gear transmission mechanism are arranged, so that when the optical cable is released by an optical fiber winding roll, the guide ring moves synchronously and transversely in a reciprocating mode, then the traction resistance of the optical cable is smaller, theoptical cable can be prevented from falling off at will, and the optical cable is protected; and traction rollers rotating oppositely are arranged, so that the optical cable is pulled to a high position, the optical cable is pulled to the high position in a labor-saving mode, hoisting and fixing are facilitated, compared with manual traction, the optical fiber hoisting and laying device is labor-saving and efficient, the optical fiber hoisting and laying device is driven by an external truck to move, efficient hoisting and laying are carried out, so that the hoisting and laying efficiency ofthe optical cable is remarkably improved.

The invention discloses an automatic traction system for large-scale tower-type crane standard-knot removal and installation and relates to the technical field of building construction machinery. The automatic traction system solves the technical problem that the existing traction system for tower-type crane standard-knot removal and installation adopts a manual traction method so that operation carried out by removal and installation operators is difficult and has low efficiency. A traction mechanism (5) of the automatic traction system is installed on a tail of a single-track introduction beam (2). An end of the single-track introduction beam (2) is provided with a leading sheave. The traction mechanism (5) passes through and is wound by a traction steel wire rope (6). A long end (7) of the traction steel wire rope (6) bypasses the leading sheave and then is fixed to an introduction trolley (3) by a rope cappel. A short end (8) of the traction steel wire rope (6) is connected to a rope tensioning device (10) on the introduction trolley (3). An introduction trailer (4) is connected to a standard-knot (9) by steel wire ropes. Two sides of the introduction trailer (4) are respectively provided with lifting lugs (11). Two sides of the introduction trolley (3) are respectively provided with angle steel mount points (13).

A manual traction device is disclosed comprising a head-strap configured to wrap around a circumference of a patient's head. A fastener is affixed to the head-strap, configured such that the head-strap may be fastened to itself. The fastener may be a hook-and-loop type fastener. One or more handle-straps are provided, which are slidably attached to the head-strap. In this manner, the position of the handle-strap(s) may be adjusted relative to the length of the head-strap. Using the disclosed manual traction device situated on a patient as more fully described herein, a therapist may apply a pulling force to the handle-strap(s) in a cephalad direction, thereby causing a traction force to be transmitted to the patient's spine.

The application discloses a train as well as a train operation control method and system. The method comprises the following steps: judging whether the train is in a manual traction mode or not; generating a first mark when the train is in the manual traction mode, and sending the first mark to a traction control unit of the train; executing manual traction control by the traction control unit according to a steering wheel operation command transferred from a hard wire; otherwise, generating a second mark when the train is in an automatic traction mode, and sending the second mark to the traction control unit; converting the traction command given in the automatic traction mode into an analog signal, and sending the analog signal to the hard wire; executing automatic traction control by the traction control unit according to the analog signal transferred from the hard wire, so as to reduce the operation difficulty and the misoperation probability of drivers by leading the automatic traction mode.

The invention provides a cable laying manual traction auxiliary tool comprising a handle, a support transverse plate, an upper compacting device, and a lower support device. The handle is hinged to one end portion of the support transverse plate. A threaded through hole is disposed on the center of the support transverse plate. A threaded rod in the upper compacting device is sleeved by the threaded through hole. An inverted-T-shaped connection rod in the lower support device is disposed on one end of the support transverse plate and is located under the handle. The cable laying manual traction auxiliary tool is simple in structure and easy to carry. The upper compacting device and the lower support device may not only clamp a cable firmly in a used process, but also fundamentally eliminate a torsion problem in a manual cable laying process.

The invention relates to a handcart type fire hose recovery device, belonging to the technical field of fire-fighting equipment and comprising a base, a water hose joint fork, a travelling mechanism, a manual traction mechanism and a transmission mechanism, wherein the water hose joint fork is provided with a joint fork shaft, is rotatably arranged on the base by the joint fork shaft and is positioned on one side of the upper end of the base; the travelling mechanism is fixedly connected with the bottom of the base; the manual traction mechanism is equipped on the base; the transmission mechanism consists of a first transmission wheel, a second transmission wheel and a transmission belt and is used for driving the water hose joint fork to rotate; the first transmission wheel is fixed on the joint fork shaft; the second transmission wheel is fixedly arranged on the travelling mechanism; and one end of the transmission belt is sheathed on the first transmission wheel, and the other end of the transmission belt is sheathed on the second transmission wheel. The handcart type fire hose recovery device has the advantages of being capable of reducing the working intensity of fire fighters, avoiding the loosing or spinning phenomenon, and having simple whole structure, labor-saving movement and no condition that the water hose generates resistance to water in the hose reeling process.

The invention discloses a separated-type double-end completely-adjustable abdominal retractor which comprises a retractor body. The separated-type double-end completely-adjustable abdominal retractor is characterized in that the retractor body is composed of a first retractor draw hook and a second retractor draw hook; certain ends of the first retractor draw hook and the second retractor draw hook are fixedly connected with a retractor drawbar, and the other ends of the first retractor draw hook and the second retractor draw hook are hook-shaped. The separated-type double-end completely-adjustable abdominal retractor is novel in design, practical, and beneficial to operation; the depth and direction changes of the retractor can be determined according to operation demands and the sizes and pulling-opening degrees of incisions of patients, and the fixation azimuth and pull strength of the retractor can be adjusted at will; traction is stable, the defect that exposure of an operation visual field is influenced by frequent unhooking caused by manual traction is avoided, and the labor and operation time are greatly saved; the separated-type double-end completely-adjustable abdominal retractor is convenient to sterilize and carry, can be popularized and generalized in both large-scale general hospitals and rural health centers, and is quite ideal in effect.

The invention relates to the technical field of toilet paper production, and discloses an automatic roll paper cutting device. The automatic roll paper cutting device comprises a large roll paper roller, a first roll paper roller, a second roll paper roller, an outer gear ring, a sun gear, a first planet wheel and a second planet wheel; an air cylinder is connected to the outer gear ring through a connecting rod, a motor is connected to the sun gear, the first planet wheel and the second planet wheel are both meshed with the outer gear ring and the sun gear at the same time, the first roll paper roller is connected with the first planet wheel, and the second roll paper roller is connected with the second planet wheel; the first roll paper roller is provided with a pushing rod connected with a suction ventilator, the first roll paper roller and the pushing rod are both hollow, a groove is formed in the first roll paper roller, an air suction hole is formed in the groove, a cutter is arranged in the first roll paper roller, a rotating rod is connected to the cutter and arranged in the pushing rod, and a rotating handle is arranged on the rotating rod; and a cutter outlet is further formed in the first roll paper roller, and the structure of the second roll paper roller and the structure of the first roll paper roller are completely the same. By means of the automatic roll paper cutting device, automatic rolling again can be achieved, and manual traction is not needed.

A boot assembly apparatus, system and method for elevating the patient's limb when using a manual distractor unit is mounted upon a support frame attached to an operating table side rail. A foot strap is attached to the boot assembly apparatus and to the patient's ankle with a patient's knee support pad, extending from the distractor unit, is positioned under the patient's knee to provide traction to the patient's ankle, which is secured to the support frame. The boot assembly apparatus may be formed with a plurality of attachment points for the foot strap so as to provide improved access to the ankle area with advantages of allowing additional types of procedures a surgeon could perform on the patient and / or the ability of the surgeon to access the ankle area and lower leg.

The invention relates to the technical field of cable traction, and discloses an adjustable cable and wire traction device. Through arrangement of a connecting bolt and the like, an operator can pull a cable towards one side by holding a roller with a hand, so that the situation that in a traditional mode, the cable needs to be manually carried up to be dragged forwards is avoided, and accidental injuries such as tightening injury to workers are prevented; through arrangement of a chain and the like, non-pure manual traction is realized, time and labor are saved, stable driving is also realized, and the phenomenon that a driving connecting piece slips due to the fact that the cable is too heavy when a traditional belt wheel is adopted for driving is avoided; through arrangement of a rubber wheel and the like, the cable paying-off height can be lowered, the situation that the construction difficulty is increased due to the fact that the cable traction slope is high and mistakenly touches an obstacle is avoided, abrasion to the cable in the pay-off process can be reduced, the service life of the cable is prolonged, and the practicability of the whole traction device is improved; and through arrangement of a connecting rod and the like, a pay-off shaft is manually rotated under the condition that a power source is lacked, so that the manual traction requirement can be met.

A tearing device to be applied to a complete package (1, 2) is disclosed, consisting of an adhesive label having a base layer (3) provided with an adhesive portion and a terminal portion (32, 33, 34, 32′, 33′) acting as gripping edge for imparting a manual traction, the label being so arranged as to determine at least two points of localised application of the stress, or a point of application of the stress and a point of reaction to the stress, very close to each other, upon applying a traction on said terminal portion. A weakening line or a preferred-rupture line (4, 4′) may be provided, with the base layer being made of a material having an ultimate tensile strength higher than that of the wrapping sheath and a much lower tensile elongation than that of the wrapping sheath.

An elevation apparatus, system and method for elevating the patient's limb when using a manual distractor unit is mounted upon a support frame attached to an operating table side rail. A foot strap is attached to the extension apparatus and to the patient's ankle with a patient's knee support pad, extending from the distractor unit, is positioned under the patient's knee to provide traction to the patient's ankle, which is secured to the support frame. The extension apparatus may be formed with a plurality of attachment points for the foot strap so as to provide improved access to the ankle area with advantages of allowing additional types of procedures a surgeon may perform on the patient and / or the ability of the surgeon to access the ankle area and lower leg.

The invention discloses an all-dimensional automatic traction and support device of a dragline type endoscopic surgical instrument, which comprises a fixed part, an instrument clamping part and a dragline type universal free arm which is connected between the fixed part and the instrument clamping part, wherein the dragline type universal free arm is formed by connecting a plurality of joint parts in series through a dragline; and an electric traction device is arranged on the fixed part, one end of the dragline is connected onto the instrument clamping part, and the other end of the dragline is connected onto the electric traction device of the fixed part. The dragline type universal free arm is used to fix the position and angle of an abdomen microscope, the electric and manual traction devices are arranged on the fixed part to control the movement state of the dragline type universal free arm, the device can be directly used for endoscopic surgery, also can be used to fix the instrument for open surgery, endoscopic surgery and other types of surgeries too, not only has a simple structure, but also is convenient to use.

The invention discloses a high-efficiency wallpaper cutting device. The high-efficiency wallpaper cutting device comprises a base; two sides of the bottom of the base are fixedly connected with support legs; the left side of the top of the base is fixedly connected with a first support plate; the top of the first support plate is fixedly connected with a first motor; an output end of the first motor is fixedly connected with a first rotating shaft; a second support plate is fixedly connected to the top of the base and positioned on the right side of the first support plate; the top of the second support plate is movably connected with a second rotating shaft; the surface of the first rotating shaft and the surface of the second rotating shaft are in transmission connection through a first conveying belt; the right side of the top of the base is fixedly connected with a third support plate; the top of the third support plate is fixedly connected with a second motor; and an output end of the second motor is fixedly connected with a third rotating shaft. The high-efficiency wallpaper cutting device can cut wallpapers without needing manual traction, improves the production efficiency, and improves economic benefits of companies.

The invention relates to the field of insulator spraying systems, in particular relates to an insulator spraying system based on a spraying robot. The insulator spraying system based on the spraying robot comprises a spraying robot device, a crank arm lifting mechanism and a displacement driving trolley, wherein the spraying robot device is arranged on the top of the crank arm lifting mechanism, and the spraying robot device can rotate for lifting and descending along with the crank arm lifting mechanism. The bottom of the crank arm lifting mechanism is fixedly arranged on the displacement driving trolley, wherein the crank arm lifting mechanism and the spraying robot device can conduct displacement through controlling the movement of the displacement driving trolley. The spraying robot device comprises a spray gun device, a first mechanical arm, a second mechanical arm and a robot base. The insulator spraying system can be conducted without manual traction, and through the driving ofthe displacement driving trolley, and through the moving of the first mechanical arm and the second mechanical arm to control a spray head, the maneuverability of the insulator spraying system is increased, the movement is more flexible, and the spraying efficiency is also higher.

The invention belongs to the technical field of medical equipment and particularly relates to an orthopedic sickbed with a traction resetting function. The technical problems are solved that transferring between a sickbed and a traction bed is inconvenient, the resetting traction effect is poor, and the neck and legs can be damaged in the traction process. According to the scheme, the sickbed comprises brackets, the outer wall of the bottom of each bracket is fixedly provided with a universal wheel with a brake through screws, a bed frame is welded to the outer walls of the tops of the brackets, supporting partition plates are welded to the central axes of the inner walls of the brackets, and a first supporting box and a second supporting box are welded to one side of the outer wall of thetop of one supporting partition plate. The orthopedic sickbed integrates the functions of the sickbed and the traction bed, and during traction resetting, the human body keeps a posture that the headslightly inclines downwards; the bed frame is subjected to electric extension instead of manual traction resetting, the strength can be better regulated and controlled, and the pain caused by traction resetting to a patient is reduced; a pressure sensor and an electric sliding rail cooperate with a fixing frame, so that the feet of the patient are lifted, limb transferring is not needed, and thesecondary injuries caused by transferring and movement to the limbs are avoided.

A traction device includes an advancing member equipped with a zone through which a member is forcibly advanced, a pair of cooperating flexible members, wherein each flexible member has at least one side thereof at least partially coated with an adhesive material, wherein the adhesive material of each the member is connected to opposing skin surrounding a wound such that a remaining portion of each member extends over and above the wound and wherein the remaining portions are connected through the zone of the advancing member in a manner to advance the remaining portions and draw the opposing surrounding skin toward each other in a manner to aid in closure of the wound.

The invention relates to an automatic wire feed straightening shaft of a steel wire straightening cutting machine. A body is a hollow cylindrical shell and is axially provided with an elongated groove. The two ends of the hollow cylindrical shell are disposed on a front bearing seat and a rear bearing seat of a frame. A belt pulley which is driven by a motor is disposed on a front short shaft. A plurality of straightening dies of wedge-shaped inclined faces are disposed in the inner cavity of the main body and are arranged on the inner walls of two opposite sides of the main body at intervals. The wedge-shaped inclined faces of the straightening dies face the steel wire feeding direction and semicircular straightening grooves are disposed on the inner sides of the rear portions of the dies. An oil-bearing copper layer is laid on each straightening groove. An adjusting plate provided with an adjusting bolt is arranged on an outer wall of the main body. The adjusting bolt is positioned and fixed by fixing screws after die gaps are finely adjusted. Due to the wedge-shaped inclined faces of the straightening dies, the automatic feeding of the steel wires is realized, and the steel wires can penetrate through the straightening grooves fast without manual traction. Due to the large contact area of the straightening groove and the oil-bearing copper layer, the straightened steel wires are fine in straightness without scratches on the surface. The straightening cutting machine is high is straightening precision and production efficiency.

The invention discloses a multifunctional traction device for the orthopedics department, and belongs to the field of medical instruments. The multifunctional traction device mainly solves the problems that traction is generally needed by the orthopedics department in a hospital at present, manual traction can not apply force evenly or last for a long time, and an optimal state can not be achieved immediately after traction to perform fixing. A left linear motor and a left pull ring are arranged at one end of a guide rail, and a right linear motor and a right pull ring are arranged at the other end of the guide rail. The positions of the left linear motor and the right linear motor on the guide rail can be adjusted according to different portions of a patient. The left linear motor and the right linear motor are connected to the guide rail, the left pull ring is fixed in the left linear motor, and the right pull ring is fixed in the right linear motor. The left pull ring and the right pull ring can be flexibly used for fixing the upper limbs or the lower limbs of the patient and are of a circular ring structure. The traction device for the orthopedics department is novel, unique, capable of replacing multiple traction instruments, good in clinical trial effect, simple, safe, reliable, effective, multifunctional and convenient to use.

The invention relates to a voice coil set pressure rectifier and a pressure rectifying method. The voice coil set pressure rectifier is arranged on a base; the top surface of the base is provided with a holding part for a voice coil set arranged; the voice coil set pressure rectifier consists of a rectifying sheet and a pressing component; the rectifying sheet can rotationally arranged on the top surface of the base and is provided with at least one lead wire part; the bottom part of the pressing component is provided with an annular arc part; and the lead wire part and the arc part are respectively corresponding to the holding part. The voice coil set pressure rectifier provided by the invention can improve the inconvenience of the lead wire of the traditional manual traction voice coil so as to lead the voice coil lead wires to form the same shape and be attached to a vibrating film of the voice coil set. Besides decreasing the possibility of noise production and infidelity of the voice coil, the invention can ensure that the sound wave transmission has better uniformity. In addition, the invention also provides a pressure rectifying method of the voice coil set.

The invention relates to a traction bed, which comprises a bed frame, a bed board, castors, universal joints, traction legs, hydraulic telescopic rods and fixing devices, wherein the castors are arranged at the lower part of the bed frame; the bed board is arranged on the bed frame; the bed board is composed of a main board and the two traction legs; the main board is connected to the two traction legs by virtue of the two universal joints, and the length of the traction legs is adjustable; the hydraulic telescopic rods specifically include two longitudinal hydraulic telescopic rods and two transverse hydraulic telescopic rods, wherein the longitudinal hydraulic telescopic rods, by which the traction legs can move upwards, are connected between the traction legs and the bed frame, wherein the transverse hydraulic telescopic rods, by which the traction legs can move in horizontal and transverse directions, are connected between the main board and the traction legs; and the fixing devices, which are used for fixing the hips and the lower limbs of a patient, are arranged on the bed board and the traction legs. The traction bed can facilitate the patient that hip joint's backward extension, adduction and abduction motion ranges are limited, so that the workload of rehabilitation therapists or family members is reduced. Moreover, the traction bed is simple to operate and low in cost, and the traction bed is capable of avoiding injuries caused by manual traction.

The invention discloses a preoperative, intraoperative and postoperative adjuvant therapy structure and device for tibia fracture. The height and inclination angle of a support plate are adjusted according to the length of lower limbs of a patient before operation or the operation requirement during operation, that is, the inclination angle between a connecting plate and a bottom plate and the inclination angle between the connecting plate and the support plate are adjusted to adjust the height and inclination angle of the support plate so as to adjust the flexion and extension angles of kneejoints. The structure is simple, operation is easy, baffles are arranged on two sides of the support plate to prevent legs of the patient from swing bilaterally, tibia fracture maintaining and reduction by a doctor can be facilitated, reduction loss due to insufficient manual traction maintaining force or traction loss is reduced, and the plate can have a support effect and reduce waste of human resources of the doctor. The plate is found to be applied to lifting affected limbs for detumescence and traction before the operation on lower limbs of the patient as well as movement rehabilitation of lower limb muscle after the operation in clinical application, has multiple functions and can enhance the user experience.

The invention discloses a fracture repositor for radius, comprising a support frame which is provided with an upper platform and a lower platform. The upper platform is provided with an upper support guide rail and the upper support guide rail is provided with an upper mobile platform. The upper mobile platform is provided with a palm connecting fixed plate. The upper mobile platform is connected with an upper translation driving mechanism. The upper platform is further provided with a fixed platform. The lower platform is provided with a lower guide rail. The lower guide rail is provided with a lower mobile platform. The lower mobile platform is connected with a lower translation driving mechanism. The lower mobile platform is provided with a lifting connecting mechanism. The fracture repositor for radius compensates the deficiency that current traction device cannot automatically realize manual traction completely and realizes automatic control of traction and restoration treatment.

The invention relates to an automatic retractor for the vagina surgery, which is used for the vagina traction in the vaginal surgery. The automatic retractor for the vagina surgery comprises upper blades, lower blades and handles which connect the upper blades and the lower blades, wherein the upper blades and the lower blades are parallel to each other, and the lower blades can move in parallel relative to the upper blades. The automatic retractor for the vagina surgery is used in the vagina surgery, a chief doctor can freely adjust the traction range, thus the process of the vagina surgery is safely and effectively guaranteed, and the injuries caused to the organ of a patient by improper manual traction can be avoided.

The invention discloses an automatic traction system for a large-size tower crane mounting and dismounting standard knot. The automatic traction system comprises a single-rail introduction beam, wherein a traction mechanism is arranged at the tail end of the single-rail introduction beam; a traction steel wire rope is wound on the traction mechanism in a shuttling manner; the long rope end of the traction steel wire rope is fixed on an introduction trolley through a rope clamp after rounding a guide pulley at the head end of the single-rail introduction beam; the short rope end of the traction steel wire rope is connected with a rope tightening device of the introduction trolley; the rope tightening device effectively fastens the traction steel wire rope; an introduction trailer is hung on the lower part of the introduction trolley; two sides of the introduction trailer are connected with hook parts on two sides of a jacking hanging hook. According to the automatic traction system for the large-size tower crane mounting and dismounting standard knot, a series of shortcomings, such as difficulty in operation of a mounting and dismounting worker, high high-altitude working risk of an operator during the mounting and dismounting work and low efficiency of the mounting and dismounting work, in manual traction adopting an existing general tower crane standard knot mounting and dismounting introduction system can be overcome.

The invention provides a linear tower upside-down mounting line rack insulator chain geoelectricity charged replacing device, relating to an insulator replacing apparatus. Central projections (6) of two connecting rods (5) connect with an end of two stay wires (4) respectively. Central parts of the two stay wires (4) are connected to grooved pulleys (3) of two support bars (1). The other ends of the two stay wires (4) are tightening ends, wherein end line rods (10) and the connecting rods (5) are high strength nylon, and the stay wires (4) are nylon material. In the invention, through tightening the stay wires by using manual traction or coiling equipment, the end line rods are driven to rise to transfer pressure of a lead, and an insulator chain can be replaced easily. According to the invention, an effect of not cutting off power supply and avoiding electric field distortion is realized, a disadvantage that cutting off the power supply is needed in a present operating mode is overcome, and a purpose of allowing a whole power transmission line to operate safely without cutting off the power supply is realized.

The invention relates to a manual rescue device of lifts, which comprises a fixed base, a left wedge block, a right wedge block, a manual traction device, a pull-up member, a hoist rope, a driving wheel arranged on the left wedge block and a driven wheel arranged on the right wedge block, wherein the fixed base is provided with a trapezoidal hollow cavity, the left wedge block and the right wedge block are distributed inside the trapezoidal hollow cavity of the fixed base and respectively come into contact with two sides of the trapezoidal hollow cavity, the pull-up member is connected with the left and right wedge blocks and is provided with a primary drag rope, the hoist rope passes through a longitudinal gap therein, which is arranged between the driving wheel and the driven wheel; and the manual traction device comprises: a rocker, a rocker return spring, a pawl and an outer ratchet wheel, wherein the outer ratchet wheel and the driving wheel on the left wedge block are immovably connected to the same shaft and the rocker is also provided with a secondary drag rope. When the hoist rope is clamped by the driving wheel and the driven wheel, the driving wheel is driven by the manual traction device to rotate, as a result, the movement of the hoist rope towards one side can be accomplished in order to drive the lift car.