1284results about How to "Even by force" patented technology

The utility model discloses a kind of foundation structure and wind turbine generator set of wind turbine generator set, it is related to wind power generation technical field, wherein, foundation structure includes first bearing platform, second bearing platform, multiple bored piles and multiple anchor rods, the top surface of first bearing platform is connected with the connecting cylinder for connecting the tower cylinder of wind turbine generator set;Second bearing platform is set below first bearing platform, the top surface of second bearing platform projects the bottom surface of first bearing platform and forms step surface, the vertical projection of the bottom surface of first bearing platform in second bearing platform forms core area, the edge of second bearing platform forms the expansion area surrounded in core area;Multiple bored piles are distributed in core area with interval, each bored pile extends downward from the bottom surface of second bearing platform, and bored pile is vertically arranged;Multiple anchor rods are distributed in expansion area with interval, and anchor rod extends downward from the bottom surface of second bearing platform and is arranged with inclination.The foundation structure has good bearing capacity and stability, can guarantee the safety and stability of wind turbine generator set in long-term operation process.

The utility model relates to the field of protective film discloses a kind of hot-press processing device of household electrical appliance protective film, including workbench, the top of the workbench is fixedly connected with support, the inner wall top of the support is fixedly installed with hydraulic cylinder, the output end bottom of the hydraulic cylinder is fixedly connected with hot-press plate, the top of the workbench is provided with fixed mechanism, the fixed mechanism includes placing seat, the placing seat is fixedly connected in the top of workbench, the front of the placing seat is provided with recess.This utility model, through the cooperation of first electric push rod, push plate, moving rod and fixed clamp, combined with the second electric push rod driving articulated rod, slide base drives fixed clamp to adjust spacing, realize the automatic pressure fixation of different size protective film, the stress is uniform during fixing process, effectively avoid the displacement and wrinkle of protective film when hot-pressing, significantly improve the close tightness, solve the problem of poor fixing effect of prior art.

This utility model discloses a wall frame structure for preventing cracks and leakage, belonging to the technical field of wall frame technology. It includes a casting slab, a reinforcing plate, a positioning structure, a feeding structure, casting holes, transverse reinforcing bars, longitudinal reinforcing bars, a main forming plate, and a secondary forming plate. The reinforcing plate abuts against the casting slab. The casting hole is located on the casting slab. The positioning structure is set on the casting slab. The transverse reinforcing bars are placed within the casting slab through the casting hole. The longitudinal reinforcing bars are placed within the casting hole and abut against the transverse reinforcing bars. The feeding structure is located on the reinforcing plate and is used to feed material into the casting hole. The main forming plate abuts against the side of the casting slab away from the reinforcing plate, and the secondary forming plate abuts against the side of the reinforcing plate away from the casting slab. This utility model, by forming a single frame with the reinforcing plate and casting slab, ensures uniform internal stress during use, greatly enhancing the overall structural strength and effectively improving the wall's resistance to cracks and leakage.

The utility model relates to fan transmission system technical field, and disclose a kind of assembly impeller, including impeller and main shaft, the detachable connection between the impeller and main shaft, at least two symmetrical distribution's protruding tooth is processed in the main shaft end face;The recess matched with the protruding tooth is opened in the impeller body end face, and torque is transferred by the side surface contact of the protruding tooth and recess;The utility model is matched by protruding tooth and recess, and contact area is big, can effectively disperse torque, reduce local stress concentration;Symmetrical distribution's protruding tooth makes stress more balanced, avoids the local failure caused by structural deviation.

This invention belongs to the field of automotive assembly technology and discloses an automated production line and control method for double-sided machining of workpieces with dual spindles. It includes a flipping mechanism, a dual-spindle machining mechanism, a raw material conveying mechanism, a finished product conveying mechanism, a robot, and a workstation conveying mechanism. The machining devices of the dual-spindle machining mechanism are spaced apart on the chassis. The lifting platform of the flipping mechanism is located next to the chassis. A flipping gripper is fixedly mounted on the chassis and positioned above the lifting platform. The rotating mechanism of the flipping gripper drives the clamping mechanism to rotate horizontally by 180 degrees. Two spindle boxes are slidably connected to the upper part of the chassis. The spindle is located inside the spindle box, with its lower end extending out of the lower end of the spindle box and fixedly connected to a spherical positioning chuck. The robot is positioned between the raw material conveying mechanism, the finished product conveying mechanism, and the workstation conveying mechanism. This invention achieves automatic workpiece flipping, avoids positioning errors and clamping eccentricity, uses air blowing to clean foreign objects from the chuck, detects the airtightness of the positioning surface, prevents workpiece deformation, and extends the service life of the equipment.

The utility model relates to the field of construction safety, concretely relates to a kind of for safety belt collocation multi-point adsorption type safety fixing device, including main frame, sucking disc, pressure outlet, pressure ware, power, connecting buckle, connecting rope, hook, alarm, the sucking disc evenly distributes in the bottom of the main frame, the pressure outlet is set in the side of one vertex of the main frame, the connecting buckle is set in the front of the main frame, the connecting rope connects the connecting buckle and hook, the pressure ware is set in the main frame and is connected with the sucking disc, the power is electrically connected with the alarm, pressure ware, after sucking disc and adsorption operating surface contact, the pressure ware empties the gas in the sucking disc by the pressure outlet. The adsorption, illuminating property, convenience, safety of the device provide better security guarantee for the safety of worker in construction site, more convenient in construction process, improve the safety index of construction site.

The application provides a kind of based on multi-muscle deep cavity belt flat plate forming system, including transport device one and transport device two, preheating mechanism, auxiliary forming mechanism and punching equipment are arranged between transport device one and transport device two, the main role of auxiliary mould device in the operation process is that skin material can be quickly and fully adhered to the cavity in mould, so that pocket forming is more square, sufficient, and the strength of pocket forming for multi-muscle or multi-cavity structure is higher;It can effectively improve the forming effect and strength of multi-cavity and pocket deep belt product, so that the skin material will be pressed by the auxiliary mould during forming, and the pressure during blowing is more concentrated, which is beneficial to the blow molding of the softened skin material after heating.The stress of pocket bottom is uniform, the forming effect is good, and the strength of the formed pocket is high, and deformation is not easy to occur.

The invention belongs to the technical field of bridge steel shell hoisting construction, and particularly relates to a fine adjustment device suitable for stability of a gravity center changing curve type steel shell, the fine adjustment device comprises a steel shell, mounting angle blocks are symmetrically arranged on the side face of the upper end of the steel shell, and an adjusting mechanism is arranged at the upper end of each mounting angle block. According to the fine adjustment device, a flexible adjustment structure composed of the magnetorheological elastomer and the electromagnetic coil is arranged, and a steel cable traction adjustment mechanism driven by the hydraulic motor is combined, so that bidirectional precise regulation and control over the stability of the steel shell are achieved, and the shear modulus of the magnetorheological elastomer can be linearly regulated and controlled through the current of the electromagnetic coil; the stress change caused by gravity center shift can be quickly responded, and the dynamic unbalance force can be counteracted in real time.

This invention discloses a silicon nitride grinding device, relating to the technical field of silicon nitride grinding devices. The device includes a support frame and a collection box. A conical cylinder is fixedly mounted on the upper surface of the support frame, and the collection box is disposed on the lower surface of the support frame. A feed trough is fixedly mounted on the upper surface of the conical cylinder, and a water storage tank is fixedly mounted on the circumferential surface of the conical cylinder. A water spray head is provided on the inner wall of the conical cylinder. A rotating shaft is rotatably mounted on the upper surface of the inner wall of the conical cylinder, and a grinding head is fixedly mounted on the lower surface of the rotating shaft. A grinding disc is fixedly mounted on the inner wall of the conical cylinder. A material unblocking device is also provided inside the conical cylinder. When the feed trough is blocked, it affects the grinding efficiency, potentially causing a decrease in output or production stoppage. Blockage causes material to accumulate in the feed trough, increasing the pressure and stress on the material. If this blockage persists for a long time, it may damage the feed trough.

This utility model provides a car roof handle and vehicle based on a four-bar linkage, belonging to the field of automotive parts technology. It includes: a base with a proximal hinge and a distal hinge, located at different positions along the depth of the base; one end of a first rocker arm hinged to the proximal hinge of the base, and the other end of the first rocker arm hinged to a connecting arm; one end of a second rocker arm hinged to the distal hinge of the base, and the other end of the second rocker arm hinged to a connecting arm; the connecting arm is hinged to the handle body. The first rocker arm, the second rocker arm, the connecting arm, and the base constitute a four-bar linkage. The advantages of this utility model are: the four-bar linkage allows for extension and retraction between the handle body and the base, enabling the handle body to be retracted and close to the base when not in use, and extended when in use, saving interior space and adapting well to bumpy driving environments.

The utility model relates to a kind of baffle assembly and dishwasher for dishwasher, baffle assembly includes reel;Flexible baffle;Fixed strip;Guide rail;Driving mechanism includes driving part;Pull rope, two and respectively can be forward and backward mobilely arranged in guide rail, the first end of one pull rope is connected with the left end portion of fixed strip, second end is connected with driving part drive, the first end of another pull rope is connected with the right end portion of fixed strip, second end is also connected with driving part drive;Elastic member, act on reel, so that reel keeps the tendency of flexible baffle winding on upper rotation.The flexible baffle of the utility model occupies small space.

The utility model discloses a drive module includes two cylinders of symmetrical setting at cylinder cover both sides, two cylinders can guarantee that cylinder cover stress is even, and the lift movement of cylinder cover is driven through cylinder, and the opening and closing of cylinder cover can be realized without manual force, and the labor intensity is reduced, the stability of the lift process of cylinder cover can be guaranteed through the cooperation of the guide column and the guide sleeve of guide module, avoids the tilting or the collision of cylinder cover because of uneven stress and leads to the damage of equipment, the sealing module can guarantee that cylinder cover and knead cylinder body's sealing fit, prevents material leakage, and the adaptive adjustment module can dynamically adjust the lift speed of cylinder cover according to the pressure in knead cylinder body, when the pressure in knead cylinder body is too big, the lift speed of cylinder cover reduces, avoids the material splashing under high pressure working condition, the intelligent monitoring module can real -time monitoring equipment state, and early warning failure avoids the accident, and the quick cleaning module can carry out the automatic cleaning to the material of remaining in the inside of cylinder cover, reduces manual operation.

The utility model discloses a guniting device for a PCCP (prestressed concrete cylinder pipe) production process, and relates to the technical field of guniting devices for the PCCP production process. The nozzle comprises a nozzle body, a nozzle groove penetrating through the bottom is formed in an inner cavity of the nozzle body, and a material conveying hose is connected to the top of the nozzle body. The fixing bolt penetrates through the bearing and the inner cavity of the first hole groove front and back to enable the nozzle to be connected with the fixing frame, the telescopic base is installed in the inner cavity of the telescopic base fixing block, the fastening nut is rotated to be aligned with the hole groove of the fixing base to enable the telescopic base to be fixed, and the nut is installed in the inner cavity of the connecting block and the inner cavity of the second hole groove. Then the nut is installed at the front end of the nut, the telescopic rod stretches out and draws back to adjust the angle of the nozzle, the nozzle 1 can achieve adjustment of various angles so as to meet different construction requirements, meanwhile, due to the design of the double nozzles, a larger coverage area can be formed, spraying dead angles are reduced, it is ensured that the slope protection face is evenly stressed, and spraying compactness is improved.

A feeding structure for folding umbrella fabric includes a base and a suction cup. The suction cup includes a rotating end and an adsorption end. The rotating end is connected to a servo motor. Several adsorption ports are formed on the lower annular surface of the adsorption end. These ports are connected to an external vacuum extraction device through connecting holes inside the suction cup. The base is equipped with a feeding rod and a folding umbrella fabric mechanism. The feeding rod is vertically adjustable on the base. The folding umbrella fabric mechanism includes an embossing surface. The lower annular surface of the adsorption end is higher than the embossing surface. A negative pressure sensor connected to the connecting holes is provided on the base. The servo motor controls the rotation of the suction cup. When the suction cup rotates above the feeding rod, the feeding rod lifts the umbrella fabric to below the adsorption end. The suction cup then adsorbs the umbrella fabric through the adsorption ports. The servo motor rotates the suction cup, causing the adsorption end to rotate onto the embossing surface of the folding umbrella fabric mechanism. This invention provides uniform adsorption of the umbrella fabric, ensuring that the umbrella fabric does not pull up lower layers of umbrella fabric during the adsorption process.

The utility model discloses a novel scale foot structure of electronic scale belongs to electronic scale technical field, this novel scale foot structure of electronic scale, including lower scale frame, the inner bottom wall fixed weight sensor of lower scale frame, the top of weight sensor is fixed with upper scale frame, one side fixed mounting vertical pole of lower scale frame, the top of mounting vertical pole is fixed with weighing instrument, the top of upper scale frame is equipped with the adjusting mechanism that can ensure that weight sensor is under any slope environment and can be stressed evenly, the inside of adjusting mechanism is equipped with the clamping mechanism that can fix the symmetrical weight product. The utility model discloses through being equipped with adjusting mechanism, can carry out self -adaptation horizontal regulation to the angle of adjusting scale platform, can ensure that weight sensor is under any slope environment and can be stressed evenly, has improved the accuracy and reliability of weighing result, and can carry out the transformation on the existing electronic scale, need not to replace whole equipment, has reduced the replacement cost of user.

The utility model discloses large -scale oil cylinder piston and piston rod's locking assembly fixture, including assembly drive arrangement, and assembly drive arrangement is provided with the central shaft, and the outside rotation cooperation of central shaft has the rotary element, and the cooperation end of rotary element is used for installing the piston, and the cooperation hole of central shaft can be inserted to the assembly of the assembly end of piston rod, and the cooperation hole is coaxial arrangement along the central axis of piston rod, when assembling, the vertical placement of piston rod makes its assembly end end face upward, and the upper coaxial sleeve of piston rod installs the piston, and the cooperation hole can form the circumferential limiting force and vertical support force of around its axis to the inserted part of central shaft, when the rotary element rotates relative to central shaft, can drive the rotation of piston relative to piston rod, and makes the assembly hole of piston can be screwed with the external thread of piston rod assembly end and is locked together, the utility model discloses can realize more accurate and smooth locking assembly with the aid of the dead weight of piston and piston rod, and then improves the assembly efficiency.

The application relates to a quick dismounting structure and method for a heavy mold, and relates to the technical field of mold manufacturing. The quick dismounting structure comprises a mounting mold frame and a heavy mold arranged on the mounting mold frame. The mounting mold frame comprises a lower mold base for supporting the heavy mold, an upper mold frame, and a wedge block assembly wedged between the heavy mold and the mounting mold frame. The heavy mold is provided with an upper mounting portion and a lower mounting portion. The lower mounting portion is provided with a lower guide surface inclined towards both sides of the heavy mold from top to bottom. The upper mold frame is provided with an upper mounting groove matched with the upper mounting portion for locking. The lower mold base is provided with a lower mounting groove matched with the lower mounting portion for locking and a push assembly slidably arranged on both sides of the lower mounting groove. The push assembly comprises an ejection unit arranged on one side of the lower mounting portion and a push-in unit arranged on the other side. The ends of the ejection unit and the push-in unit are respectively parallel to the corresponding lower guide surfaces. The application can improve the quick dismounting effect of the heavy mold and the mold frame support.

The utility model discloses a kind of LED lamp bead patching devices, relate to LED lamp processing technical field.The LED lamp bead patching device, including base, press-down mechanism and material conveying mechanism, the top of base is fixedly connected with L-shaped stand, press-down mechanism includes the support frame being set on base and the fixing ring being set on support frame, the rear side of base is fixedly connected with support frame, material conveying mechanism includes the conveying assembly being set on base and the limiting assembly being set on base, conveying assembly and limiting assembly are all clamped and set, and setting is provided with roller on conveying assembly.The mechanism can adjust the moving range according to the width of the lamp strip on the one hand, this design can avoid the excessive defect condition of the lamp strip base during transmission, avoid the appearance of excessive adhesive oblique defective product, on the other hand, the mechanism can automatically transport the lamp strip transmission, more easily uniform pasting with press-down mechanism.

This utility model relates to the technical field of rail vehicle components and discloses a uniformly stressed rubber stack for rail vehicles, including a support base. A central metal sphere is fixedly installed inside the support base. A first rubber layer is fixedly installed on the outer side of the central metal sphere. A first supporting sphere is fixedly installed on the outer side of the first rubber layer. A second rubber layer is fixedly installed on the outer side of the first supporting sphere. A second supporting sphere is fixedly installed on the outer side of the second rubber layer. This uniformly stressed rubber stack for rail vehicles has a cylindrical support plate with a first and second inclined surface, reducing stress concentration. Through a multi-layer metal reinforcement structure design, local stress concentration is reduced, dynamic load transfer efficiency is improved, and the longitudinal and lateral stiffness of the rubber stack is increased, resulting in uniform stress distribution, extended service life, longer replacement cycles, lower failure rates, and reduced maintenance costs.

This application relates to the technical field of lifting equipment, providing a lifting mechanism for painting automotive tailgates. The mechanism includes a base, a boom, a lifting drive device, and a counter-positioning device. The boom and lifting drive device achieve stable lifting of the automotive tailgate, while the counter-positioning device provides additional support and positioning, ensuring the tailgate's stability during painting. Furthermore, the boom employs a multi-arm structure and is equipped with locking components for angle adjustment. The bottom frame is equipped with a tensioning device and tension sensor to optimize the tension on the pull ropes, further improving lifting accuracy and safety. This application achieves the technical effect of improving the stability, accuracy, and ease of operation of automotive tailgate lifting, providing reliable support for painting processes.

This utility model discloses a workstation docking device for a tea packaging production line, specifically relating to the technical field of tea packaging production equipment. It includes a docking transition plate, on the side of which a tea production line device is mounted. A slider is fixedly connected to the tea production line device. A groove is formed on the docking transition plate, and the slider is slidably connected to the groove. An auxiliary rod is fixedly connected to the surface of the docking transition plate, and a rotating shaft is slidably connected to the auxiliary rod. A limit block is rotatably connected to the inner wall of the rotating shaft, and an insertion block is fixedly connected to one end of the limit block. A first slot is formed on the outer surface of the tea production line device, and the insertion block is inserted into the first slot. This workstation docking device for a tea packaging production line achieves rapid assembly of the docking transition plate and the tea production line device through the sliding connection of the groove and the slider, reducing installation and debugging time.

The utility model relates to the technical field of grinding devices, in particular to a wafer production grinding device which comprises a workbench, a first hydraulic cylinder is fixedly installed in the workbench, a lifting plate is fixedly installed at the output end of the first hydraulic cylinder, and a positioning rod is fixedly installed at the bottom end of the lifting plate. A first motor is fixedly mounted on the side face of the lifting plate, and a rotating rod is fixedly mounted at the output end of the first motor. According to the wafer polishing device, the first hydraulic cylinder drives the lifting plate to ascend and descend, the first motor drives the rotating rod to rotate, the clamping plate moves to place and fix a wafer, the second motor and the third motor drive the first lead screw and the second lead screw to rotate and drive the sliding block and the moving plate to move, and the fourth motor is started to enable the polishing piece to polish the wafer. And meanwhile, the first spring on the upper portion enables the wafer to be stressed more evenly, and the wafer is prevented from being broken.

This invention provides a planetary gear reducer, belonging to the technical field of reducer technology. It solves the problem of unstable torque in existing technologies. This invention includes a front housing, a gear ring body, a rear housing, a planetary gear assembly, an input shaft, and an output splined shaft. The front housing, gear ring body, and rear housing are connected sequentially, and the planetary gear assembly is installed inside the front housing, gear ring body, and rear housing. The planetary gear assembly includes planetary gears, a sun gear, and a planet carrier. The planet carrier is a hollow annular sleeve with a mounting hole in the center and a connecting ring formed on the rear side. The planetary gears are fitted onto the planetary shafts and located in the mounting hole, meshing with the inner side of the gear ring body. The sun gear is located inside the planet carrier and meshes with the planetary gears. A keyway groove is formed on the inner side of the connecting ring groove on the rear side of the planet carrier, and the output splined shaft is connected to the rear side of the planet carrier through the keyway groove. This invention has the advantages of stable torque transmission and high precision.

The application relates to an automatic contraction leveling device, belongs to the technical field of decoration, and particularly relates to a fireproof curtain bottom automatic contraction leveling device, which comprises a floor and a fireproof curtain box group, the fireproof curtain box group is arranged at the bottom of the floor, further comprises fireproof curtain cloth, a telescopic assembly and an angle steel, the fireproof curtain cloth is arranged in the interior of the fireproof curtain box group, a fireproof curtain metal plate is fixedly installed at the bottom of the fireproof curtain cloth, the telescopic assembly comprises a sleeve fixedly installed on one side of the fireproof curtain metal plate, the angle steel is fixedly installed at the bottom of the floor on both sides, a limiting square tube is fixedly installed at the bottom of the angle steel, the automatic contraction leveling effect is achieved, the problems that the system rigidity and adaptability of the existing patent are insufficient, the stability and durability are insufficient, the synchronization of multi-point leveling actions cannot be guaranteed, and the wear protection and maintenance convenience design for long-term use are weak are solved.

The utility model discloses a kind of automobile stabilizer bar detection tool, it is related to automobile detection technical field, including box, two motors are installed in the inside of box, the one end of each motor is connected with screw rod, the outer wall of screw rod is connected with support with thread, the top end side of support is equipped with hydraulic cylinder, the telescopic end of hydraulic cylinder is connected with push rod, the outer wall of push rod is slidably connected with two push blocks, the inner wall of each push block is equipped with sliding slot, each push block is slidably connected with push rod by sliding slot;In the utility model, balanced force of stabilizer bar is realized by three-point positioning using fixing assembly, actual installation working condition is simulated, local stress concentration problem caused by traditional single-point, two-point clamping is avoided, ensure that stabilizer bar is evenly stressed during detection process, avoid deformation or damage caused by improper clamping, reduce the data deviation generated by clamping problem, improve detection accuracy.

This utility model discloses a high-load-bearing machine tool base, including a top plate, a bottom plate, side plates, and supporting partition plates. The two ends of the top plate and the bottom plate are connected by the side plates. The side plates and the supporting partition plates are vertically arranged and perpendicular to each other. The supporting partition plates are evenly distributed between the top plate and the bottom plate along the length of the top plate. Each supporting partition plate includes an arc-shaped support part, a vertical support part, and an inclined support part. The two ends of the arc-shaped support part are connected to the side plates on both sides, respectively. The upper end of the vertical support part is connected to the top plate, and the lower end is connected to the bottom plate. The inclined support parts are located on both sides of the vertical support parts, with the upper end connected to the top plate and the lower end connected to the bottom plate. The inclined support parts gradually incline towards the vertical support parts from top to bottom. This utility model has a simple structure, is easy to manufacture, and has high structural strength, effectively improving the load-bearing capacity of the base.

The application discloses a double-glass module frameless laminating device and a photovoltaic module laminating equipment. The device comprises a rod and a supporting member extending along a first direction, the rod and the supporting member are oppositely arranged along a second direction, and a side surface and a bottom surface edge of the rod are provided with a clearance groove penetrating along the first direction. The clearance groove has a bottom opening, a side opening and two end opening. The supporting member comprises a mounting portion and a plurality of connecting portions, the mounting portion is provided with a reinforcing member, the bottom of the rod is provided with a mounting groove connected with the connecting portions, and a partition rod can also be arranged. The long side of the flange of the laminating equipment is provided with a plurality of the devices. The device can effectively avoid the edge of the module, even if a slight deviation occurs when the module is fed, rigid contact between the device and the edge of the module can also be avoided, the damage rate of the module is obviously reduced, the structure is stable, and deformation is not prone to occurring during long-term use. The whole structure is simple, easy to process, manufacture and install and maintain, and is suitable for large-scale industrial application.

The utility model relates to the technical field of fan manufacturing especially is concerned on a kind of fan grease injection shaft seal device, it includes sealing body, the sealing body is installed on the shell by first fixed bolt, multiple beef tallow packing are installed in the sealing body, the sealing body is also equipped with the compacting mechanism that the beef tallow packing is compacted to it on.Being installed when the shaft seal device, sealing body is installed to shell first, then install beef tallow packing, finally compacting mechanism is installed to sealing body, realize the fixation of beef tallow packing;Further make the dismounting of shaft seal device more convenient, and the setting of beef tallow packing makes the sealing effect of shaft seal better effect.

This utility model discloses a small pipe bending device, comprising: a housing, characterized in that: one end of the housing is provided with a roller, the roller is provided with a positioning groove, and a bending mechanism is provided on one side of the roller. The bending mechanism includes: a base, and a drive wheel is provided on the base; the drive wheel includes: a fixed sleeve, the upper part of the fixed sleeve is provided with an arc-shaped guide groove corresponding to the positioning groove, the diameter of the arc-shaped guide groove matches that of the positioning groove, a connecting frame is provided on the arc-shaped guide groove, a rotating shaft is provided on the connecting frame, a bracket is provided on the base, the two ends of the rotating shaft are rotatably connected to the bracket, and a rocker arm is provided on the connecting frame. This utility model has a simple structure, is easy to operate, can bend pipes at a fixed angle, and can adjust the bending size to adapt to pipes of different specifications.