87results about How to "Adjust the use angle" patented technology

The invention discloses a telescopic multi-head water milling drilling machine for tunnel construction, and relates to the technical field of tunnel construction, in particular to the telescopic multi-head water milling drilling machine for tunnel construction, which comprises a mounting bracket, fixed supporting plates are mounted on the left side and the right side of the mounting bracket, and a mounting frame is fixedly mounted at the side end part of each fixed supporting plate; the outer surface of the mounting support is sleeved with a connecting clamping plate, a fourth rotating motor is rotatably mounted at the side end of the connecting clamping plate, and a supporting column is slidably mounted at the side end of the fourth rotating motor. According to the telescopic multi-head water milling drilling machine for tunnel construction, a first rotating motor drives a first threaded rotating rod to rotate to be matched with an upper sliding block so as to drive an extension arm and other parts to slide, and then the positions of a second rotating motor and a water milling drilling body are rapidly adjusted, so that the use distance of the device can be rapidly adjusted when the device is used; the device practicability is improved, and the device use efficiency is enhanced.

The utility model relates to the technical field of mounting brackets, in particular to a photovoltaic module mounting bracket, which comprises a mounting frame. The rotating frame is used for mounting the photovoltaic module, and the rotating frame is rotationally arranged on the inner wall of the mounting frame through a hinge; the adjusting assembly comprises a threaded column rotatably arranged on the inner wall of the mounting frame and a sliding block slidably arranged on the inner wall of the mounting frame, the end of the threaded column extends to the side face of the mounting frame and is fixedly provided with a rotating block used for rotating the threaded column, and the side face of the sliding block is provided with a threaded hole in threaded connection with the outer surface of the threaded column; and an adjusting ejector rod is rotationally arranged on the upper surface of the sliding block. According to the utility model, through the arrangement of the adjusting assembly, the use angle of the rotating frame can be adjusted when the photovoltaic panel is mounted by the mounting bracket, and after the photovoltaic panel is dismounted, the rotating block can be reversely rotated to drive the rotating frame to rotate into the mounting frame for storage, so that the mounting bracket is convenient to carry.

The utility model discloses an adjustable ground trowelling machine which comprises a machine frame, a protective ring, a handrail pipe and moving wheels, a support frame is installed at the lower end of the machine frame, the protective ring is installed at the lower end of the machine frame through the support frame, the handrail pipe is installed on one side of the support frame, and the moving wheels are installed on the periphery of the outer side wall of the protective ring. A supporting frame is arranged on the periphery of the protection ring, a supporting column is rotationally arranged in the supporting frame, a forward and reverse rotation motor is arranged on one side of the supporting frame, and an output shaft of the forward and reverse rotation motor is connected with the supporting column. The utility model relates to the technical field of building construction equipment, in particular to an adjustable ground trowelling machine which can be conveniently transported and moved, the using angle and length can be adjusted, and the using convenience is improved.

The utility model relates to the technical field of equipment maintenance, and discloses an equipment maintenance device which comprises a supporting chassis, a fixed base is fixedly connected to the center of the top of the supporting chassis, a rotating assembly is arranged at the top of the fixed base and comprises a sleeve rod, a fixed disc is fixedly connected to the top of the sleeve rod, and the fixed disc is fixedly connected to the top of the sleeve rod. Supporting arms are fixedly connected to the left side and the right side of the fixing disc correspondingly, clamping mechanisms are arranged at the top ends of the supporting arms, each clamping mechanism comprises a connecting plate, a fixing block, a limiting damper, a rotating shaft, a connecting rod and a hand wheel, the using angle of the maintenance device can be flexibly adjusted through a rotating assembly, and the maintenance device is made to meet the maintenance requirements of different devices; and meanwhile, through cooperative use of a first limiting rod and an adjusting rod, stable fixing of the maintenance device in the using process can be achieved, and through arrangement of a clamping mechanism, flexible adjusting and fixing of equipment maintenance parts can be achieved through a connecting arm, a first guide wheel and a second guide wheel.

The utility model is suitable for the technical field of projector installation, and provides a projector installation support which comprises a base. The driving motor is assembled on the base; the lead screw is rotationally mounted on the base, and one end of the lead screw is fixedly connected with an output shaft of the driving motor; the connecting frame is arranged on the lead screw in a threaded and sleeving manner; the adjusting mechanism is assembled on the connecting frame and is used for adjusting the use angle of the placed projector; the placing plate is arranged on the adjusting mechanism and is used for placing the projector; and a plurality of fixing mechanisms assembled on the placing plate, wherein the fixing mechanisms are used for clamping and fixing the projectors placed on the placing plate. According to the projector mounting bracket provided by the scheme, the projector can be well mounted, meanwhile, the use height and angle of the projector can be conveniently adjusted, and the use convenience and flexibility are improved.

The invention relates to the technical field of lathes, and particularly discloses equipment for manufacturing friction plates and a manufacturing method thereof.The equipment comprises a bottom frame, a lathe body is arranged at the upper end of the bottom frame, a machining bin is arranged on the inner side of the lathe body, a visual bin door is arranged on the front face of the machining bin, and a clamp device is arranged on the left half portion of the inner side of the machining bin; a turning tool assembly is arranged on the right half portion of the inner side of the machining bin, a moving assembly is arranged on the top of the inner side of the machining bin, a lifting assembly is arranged at the lower end of the moving assembly, and a rotating assembly is arranged at the lower end of the lifting assembly. Due to the fact that the working lamp is installed on the lower frame body, the output end of the first driving motor drives the lower frame body with the installation shaft to rotate on the inner side of the upper frame body, the use angle of the working lamp can be conveniently adjusted, and therefore it is avoided that when a clamp device or a turning tool assembly is installed, light rays of the working lamp perpendicularly irradiate one position, and the turning tool assembly is damaged. And the installation efficiency is influenced due to light blocking.

This utility model discloses a 1 / 4 threaded multi-purpose extension bracket, including: a bracket platform 1, a base 2, and a base connecting rod 4. The base connecting rod 4 is disposed on the lower end face of the base 2 and is used to mount the bracket platform 1 on a car or a small installation platform. The bracket platform 1 and the base 2 are rotatably connected. The bottom of the bracket platform 1 is connected to a rotating wheel 15 via a vertical rod. The outer side of the rotating wheel 15 is provided with teeth for inserting a limiting device. The lower end face of the rotating wheel 15 is provided with a circular sliding groove 13. The bottom of the hollow cavity of the base 1 is provided with a circular base sliding groove 21. The sliding groove 13 and the base sliding groove 21 are the same size and are matched for installation. A ball bearing 24 is provided in the base sliding groove 21. Under the action of the ball bearing 24, the bracket platform 1 can rotate on the base 2 to adjust the appropriate direction for use of the equipment mounted on the bracket platform 1.

The utility model relates to computer support technical field, specifically disclose a kind of turnover type computer support, including: bottom plate, the top of bottom plate is provided with adjusting disc, the top of adjusting disc is provided with placing plate, the inside rotation of bottom plate is provided with rotating shaft, and adjusting disc is fixedly connected to the top of rotating shaft surface, the side of adjusting disc top is fixedly connected with firm frame, the inside of bottom plate is provided with air slot, the bottom end of rotating shaft surface is fixed and has first tooth disc, the inner side wall of actuating groove is slidably connected with actuating block, the side of actuating block is fixedly connected with first return spring, the end of connecting rod away from actuating block is fixedly connected with first clamping block;The utility model is through the collocation use of adjusting disc, firm frame, first tooth disc, placing plate, second clamping block, down bar and pressing block, so that notebook computer can be placed horizontally adjusted position, it is convenient and colleague better to carry out exchange discussion to work content, avoid the situation that it falls due to frequent handling notebook computer.

The utility model relates to the technical field of industrial automation control, and discloses industrial automation control equipment which comprises an equipment box, the upper end of the equipment box is provided with a baffle and a supporting plate, one side of the supporting plate is provided with a groove, and one side of the supporting plate is rotatably provided with a control panel used for debugging the equipment. An adjusting mechanism is arranged in the groove and used for adjusting the use angle of the control panel, the adjusting mechanism comprises a threaded rod, a threaded sleeve, a connecting rod, a connecting block and a rotating disc, the threaded rod is rotationally arranged in the groove, the threaded sleeve is arranged in the threaded rod in a threaded mode, the threaded sleeve is slidably connected with the groove, and the connecting rod is hinged to one side of the threaded sleeve; the end, away from the threaded sleeve, of the connecting rod penetrates through the groove, and the connecting block is hinged to the end, penetrating through the groove, of the connecting rod; when the device is used, the angle of the control panel can be adjusted more conveniently, and the device box does not need to be moved, so that the device is simpler and more convenient.

The utility model relates to the PCBN blade detection technical field, and discloses a PCBN blade cutting edge detection tool comprising a pedestal, the top of the pedestal is provided with a guide groove, the inside of the guide groove is slidably connected with two slide blocks, the tops of the two slide blocks are fixedly connected with damping rods, the inside of the damping rods is rotatably connected with damping balls, and the damping balls are fixedly connected with the damping rods. The outer surface of the damping ball is fixedly connected with a fixing rod, and the top end of the fixing rod is fixedly connected with a device base. Through cooperative use of the base, the guide groove, the damping rod, the damping ball, the fixing rod, the device base, the clamping block, the second motor and other structures, a blade can be conveniently clamped and fixed to the device base and is driven to rotate to carry out cutting edge detection work, meanwhile, in the detection process, the use angle of the device base can be conveniently adjusted, and the detection efficiency is improved. And inclination detection is carried out on the cutting edge of the blade, so that the detection accuracy of the cutting edge of the blade is improved.

The utility model discloses an oral cavity supporting structure which comprises a lower jaw supporting frame and an upper jaw supporting frame, the lower jaw supporting frame and the upper jaw supporting frame are connected in a rotating mode, and tooth sockets are formed in the top of the upper jaw supporting frame and the bottom of the lower jaw supporting frame. The adjusting screw is arranged to drive the sliding block to move in the side box, and then the sliding block drives the movable rod to move, so that the movable rod pushes the upper jaw supporting frame upwards and opens around the lower jaw supporting frame at an angle, and the purpose of adjusting the use angle between the lower jaw supporting frame and the upper jaw supporting frame is achieved; the oral cavity supporting structure is suitable for oral cavities of different patients, teeth of the patients are clamped in the tooth grooves through the tooth grooves, the lower jaw supporting frame and the upper jaw supporting frame are more stably used in the oral cavities of the patients, and meanwhile the problems that most existing oral cavity supporting structures are integrated, do not have the function of adjusting the opening angle of the oral cavity and are inconvenient to use are solved. And the oral applicability of different patients is reduced.

This utility model discloses a powder conveying pipeline adjustment structure, which includes a placement frame, a support rod bolted to the top of the placement frame, a pipeline limiting frame bolted to the top of the support rod, a pipeline body movably connected to the inner wall of the pipeline limiting frame, an adjustment component bolted to the front side of the support rod, a threaded rod provided on the front side of the adjustment component, a movable rod threadedly connected to the surface of the threaded rod, a connecting frame provided on the front side of the movable rod, and a rotating component rotatably connected to the inner wall of the connecting frame. This invention solves the problem that existing powder conveying pipelines are prone to displacement due to vibration during bending adjustments, leading to changes in the conveying path and requiring frequent readjustment, increasing maintenance workload and downtime. Furthermore, the angle adjustment function of the powder conveying pipeline adjustment structure is not flexible enough to accurately adapt to the pipe angle requirements under different working conditions.

The utility model discloses a multi-section type hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders and comprises a bearing seat, an adjusting shaft is rotatably connected in the bearing seat, a multi-section hydraulic cylinder main body is fixedly connected on the outer side of the adjusting shaft, a telescopic valve is arranged on the outer side of the multi-section hydraulic cylinder main body, an adjusting mechanism is arranged in the bearing seat, and the adjusting mechanism is fixedly connected with the adjusting shaft. The adjusting mechanism comprises an adjusting assembly and a stabilizing assembly, the adjusting assembly and the stabilizing assembly are used in cooperation, the adjusting assembly comprises a motor, and the motor is fixedly connected to the side, away from the adjusting shaft, of the bearing base. According to the multi-section type hydraulic oil cylinder, the use angle of the multi-section type hydraulic oil cylinder body can be rapidly adjusted through the arranged adjusting mechanism, compared with a fixed installation mode, the multi-section type hydraulic oil cylinder is more diversified in use scene, the influence on production due to the fact that the angle cannot be adjusted is avoided, and the multi-section type hydraulic oil cylinder is simple in structure and high in practicability.

The utility model provides an instrument panel support detection clamp. The instrument panel support detection clamp comprises a fixing seat, a lifting frame is arranged at the top of the fixing seat, an angle adjusting mechanism is arranged on the lifting frame, a mounting frame is arranged above the fixing seat and connected with the angle adjusting mechanism, a rotating disc is rotationally mounted on the mounting frame, and a rotating shaft is arranged on the rotating disc. A rotating mechanism is arranged on the mounting frame, and a clamping mechanism is arranged on the rotating disc. The instrument panel support detection clamp provided by the utility model has the advantages that the adjustment is convenient, the use comfort can be improved, and the detection efficiency can be improved.

The utility model relates to the technical field of prying body frames, and discloses a wear-resistant prying body frame which comprises a bottom plate, a prying body device is arranged on one side of the outer surface of the bottom plate and comprises a base, a rotating shaft is arranged on one side of the outer surface of the base, and a prying plate is arranged on one side of the outer surface of the rotating shaft. A connecting box is arranged on one side of the outer surface of the base, a threaded rod is arranged in the connecting box, a movable plate is arranged at one end of the threaded rod, a supporting rod is arranged on one side of the outer surface of the movable plate, a fixed plate is arranged in the connecting box, a fixed rod is arranged on one side of the outer surface of the fixed plate, and a rotating pipe is arranged at one end of the threaded rod. According to the utility model, when the rotating pipe rotates, the threaded rod rotates, so that the movable plate moves left and right, and the movable plate is in contact with the crow plate, so that when the crow plate is extruded by the movable plate, the use angle of the crow plate is adjusted, and the effect of adjusting the use angle is realized.

The livestock manure scraper comprises a main frame, a manure scraping assembly is arranged on the inner wall of the main frame, and a side plate is arranged on the outer wall of the manure scraping assembly; the manure scraping assembly comprises a motor fixedly arranged on the outer wall of the main frame and a rotating shaft part movably arranged on the inner wall of the main frame, a scraping plate is arranged on the outer wall of the rotating shaft part, a connecting shaft part is arranged on the outer wall of the scraping plate, an output shaft of the motor is fixedly connected with a rotating disc through a coupler, and a conveying belt is connected to the outer wall of the rotating disc in an attached mode; a limiting groove is formed in the outer wall of the rotating shaft piece, and the inner wall of the limiting groove is connected with the inner wall of the conveying belt in an attached mode. According to the animal husbandry manure scraper, through arrangement and cooperative use of the scraper, the connecting shaft piece and the clamping plate, after the device is used, the side plate is detached through the locking assembly, the empty cylinder and the screw rod are relatively rotated, the connecting shaft piece is detached, the scraper is pulled downwards, the scraper is cleaned, after the scraper is air-dried, the scraper and the rotating shaft are assembled again, and therefore the cleanliness of the scraper is kept.

The utility model particularly relates to a spraying type cleaning device for traditional Chinese medicine decoction piece production, which belongs to the technical field of traditional Chinese medicine decoction piece production and comprises adjusting mounting racks, a width adjusting structure mounted between the adjusting mounting racks, a conveying adjusting sieve plate mounted between the adjusting mounting racks, and spraying adjusting telescopic rods mounted on two sides of the adjusting mounting racks. A direction adjusting motor is installed on one side of each spraying adjusting telescopic rod, an assembling spraying pipe is installed between the spraying adjusting telescopic rods, a water conveying connecting structure is arranged on one side of each spraying adjusting telescopic rod, the width of the conveying adjusting sieve plate is adjusted through a width adjusting structure, the area of materials conveyed by the device at the same time is increased, and the adjusting mounting frame is used for adjusting the material conveying speed. The use angle of the conveying and adjusting sieve plate is adjusted, the material conveying speed of the device is adjusted, the use effect of the device is improved, state adjustment and use are conducted by assembling a spraying pipe matched with the device, the spraying angles of all positions of the device are adjusted through mutual cooperation with a direction adjusting motor, and the spraying and cleaning effect of the device is improved.

The utility model discloses a sketching easel convenient to carry, and relates to the technical field of painting creativity, the sketching easel comprises two moving seats, a connecting box is fixedly installed between the two moving seats, a placing box is connected in the connecting box in a sliding mode, and a spring buckle is clamped in a corresponding round hole in the surface of a folding rod for limiting. The folding rods and the connecting rods can support the bearing plates, the use angle of the two bearing plates can be changed by sliding adjustment of the connecting rods in the folding rods, then the use angle of the drawing board is adjusted, paper and pens or paint used for drawing can be stored in the containing box, and an integrated folding structure is adopted, so that the drawing board is convenient to use. According to the drawing board storage device, the occupied space needed by storage of the device can be reduced, the situation that the supporting legs and the easel need to be separated for carrying is avoided, the practicability of the device is improved, the upper clamping block and the lower clamping block are close to each other or away from each other, a used drawing board is conveniently clamped between the upper clamping block and the lower clamping block, and a user can conveniently carry or use the drawing board.

The utility model provides a solar intelligent road marking device. The solar intelligent road marking device comprises a supporting mechanism and a marking mechanism, the supporting mechanism comprises a stand column, connecting rings are distributed on one side of the stand column at equal intervals in a sleeving mode, one side of each connecting ring is fixedly connected with the stand column, a clamping groove is integrally formed in one side of each connecting ring, inserting grooves are formed in one side of each connecting ring at equal intervals, and supporting blocks are slidably connected to one sides of the interiors of the inserting grooves. The identification mechanism comprises a solar signboard and a fixing frame, a half gear is rotationally mounted on one side of the fixing frame, and one side of the half gear is fixedly connected with the solar signboard; according to the solar signboard, the clamping blocks are arranged to be matched with the inserting blocks to be clamped into the clamping grooves and the inserting grooves, the supporting blocks are shifted to penetrate through the inserting holes to be attracted by the magnetic attraction blocks, the fixing frame and the connecting ring are rapidly connected and locked through the supporting blocks, and the solar signboard is installed and fixed without components such as bolts. And the situation that the solar signboard cannot be quickly disassembled for adjustment due to corrosion at the joint is prevented.

The utility model discloses an energy-saving building construction dust falling device, and relates to the technical field of building construction. Comprising a water storage tank, a bottom plate and a second mounting shell, a photovoltaic panel is arranged in the second mounting shell, multiple sets of clamping grooves are formed in the outer side of the water storage tank, a magnet strip is arranged in a first mounting shell, and a supporting rod is rotationally arranged on the inner side of the second mounting shell. According to the dust falling device, the photovoltaic panel, the supporting rod and other components are arranged, electric energy generated by photosynthesis can be provided for electrical elements in the dust falling device for use through the photovoltaic panel, the energy-saving effect is achieved, and when the photovoltaic panel in the second mounting shell is used, the photovoltaic panel can be used by rotating the using angle between the supporting rod and the inner side of the second mounting shell, so that the dust falling effect is improved. The supporting rods are inserted into the clamping grooves formed in the outer side of the water storage tank, the supporting rods are connected with the clamping grooves of different heights in a clamping mode, the use angle of the second installation shell can be adjusted conveniently according to use requirements, and it is guaranteed that the photovoltaic panel is irradiated by sunlight to the maximum extent.

The utility model provides a bedside multifunctional support, which relates to the technical field of medical instruments and comprises a bed frame, sliding plates, a tray, a limiting component, a rotating component and two sliding plates arranged on one side of the outer end of the bed frame, the tray is arranged on one side of the outer end of each sliding plate, and the limiting component is arranged on one side of the outer end of each tray and used for limiting and fixing the tray. A rotating assembly is arranged between the tray and the sliding plate and used for adjusting the using position of the tray. According to the bedside multifunctional support, various pipelines of a bedridden patient can be limited to the top of the tray through the limiting assembly, the tray can rotate, the use angle of the limiting assembly can be adjusted, and the use position of the tray can be flexibly adjusted through the rotating assembly.

The utility model discloses an adjustable paint box for art painting, which comprises a mounting base, the top of the mounting base is rotatably connected with a mounting bracket, one side of the mounting bracket is provided with an adjusting mechanism, and the top of the mounting bracket is provided with a storage mechanism. The storage mechanism comprises a mounting box, a rotating base, a mounting shaft, a storage box, a linkage frame and a connecting shaft, and a locking mechanism is arranged on one side of the mounting box; the use angle of the paint box is adjusted through the adjusting mechanism, the use flexibility of the paint box is improved, the position of the material storage box is automatically adjusted through the material storage mechanism, then self-adaptive adjustment of the paint box is achieved, the material storage mechanism is locked through the locking mechanism, multiple material storage boxes can be positioned, and the practicability is high. And the paint in the storage box can be conveniently taken and used, the situation that the paint leaks when the paint box is used is avoided, and the practicability and functionality of the paint box are improved.

The utility model discloses a polishing mechanical arm structure, and relates to the technical field of metal machining. Comprising a supporting table, a mounting shell and a guide shell, an exhaust fan is arranged on the back face of a mounting screen plate, four sets of limiting plates are symmetrically arranged on the inner wall of a wind chamber, a filter screen is movably arranged on one side of each limiting plate, and a telescopic pipe is arranged on the outer side of the wind chamber in a penetrating mode. According to the metal polishing device, the telescopic pipe and other components are arranged, through operation of the exhaust fan, connection of the telescopic pipe and flowing of air, chippings generated by metal polishing can enter the air extraction box through the telescopic pipe, and the chippings entering the air extraction box can be blocked and filtered through the filter screen; and the limiting plate can be used for limiting installation and sliding of the filter screen, and then the filter screen movably penetrates through the top of the wind chamber, so that the filter screen is convenient to disassemble, assemble, replace or clean, the effect that the scrap collecting assembly can move along with the grinding position to collect scraps is achieved, and the manual scrap cleaning difficulty is effectively reduced.

The utility model discloses a workpiece cooling assembly for machining a cutter center, which relates to the field of cutter machining and comprises a machining bin, a machining table is connected to the inner wall of the middle of the machining bin, water leakage holes are uniformly formed in the machining table, and fixing mechanisms are arranged on the two inner walls of the machining bin and located above the two ends of the machining table. A water tank is connected to the bottom of the processing bin, a water pump is arranged on the side, located on the processing bin, of the top of the water tank, the water inlet end of the water pump is connected with a conveying water pipe, one end of the conveying water pipe is inserted into the water tank, and the water outlet end of the water pump is connected with a drainage pipe. The problem of waste caused by the fact that part of water is sprayed outside due to the fact that the range of sprayed water is wide in use can be solved, the sprayed water can be cleaned and utilized again after being filtered and purified, and heat energy of high-temperature waste water obtained after cleaning can be effectively utilized.

The utility model discloses an indoor transparent OLED sign display screen, and belongs to the technical field of OLED transparent screens. An indoor transparent OLED label display screen comprises a bottom box and further comprises a display screen body arranged above the bottom box, a first adjusting part used for driving the display screen body to ascend and descend is arranged in the bottom box, and a second adjusting part used for driving the display screen body to move is arranged at the bottom of the bottom box; the first adjusting part comprises a motor fixedly connected into the bottom box and a screw rod rotationally connected into the bottom box, the output end of the motor is fixedly connected with a first bevel gear, and the surface of the screw rod is fixedly connected with a second bevel gear; the height of the display screen can be adjusted according to the indoor using environment, a user can conveniently and rapidly adjust the using angle and the placing position of the display screen, and therefore the using effect of the display screen is improved.

The invention discloses an intensive care unit disinfection device based on ultraviolet irradiation, and relates to the technical field of medical equipment.The intensive care unit disinfection device comprises a base, four trundles are arranged at the bottom of the base, a base is fixedly arranged at the top of the base, a liquid storage tank is fixedly arranged at the top of the base, and a liquid inlet is formed in the top of the liquid storage tank; an adjusting structure is arranged in the liquid storage box, the adjusting structure comprises a storage box, the storage box is fixedly arranged in the liquid storage box, and a first multi-stage electric telescopic rod is arranged at the position, located in the base, of the top of the base; one end of the first multi-stage electric telescopic rod sequentially penetrates through the base, the liquid storage box and the storage box to be fixedly connected with a first bottom plate. According to the disinfection device for the intensive care unit based on ultraviolet irradiation, disinfection equipment can be stored in the storage box for protection work, damage to the disinfection equipment when the disinfection equipment is not used can be avoided, and the service life of the disinfection device is prolonged.

The utility model relates to the technical field of manipulators, and discloses a flexible steering mechanical arm which comprises a base and a transmission belt, a connecting arm is arranged on the upper side of the base, a machine head is fixedly connected to the top of the rear side of the connecting arm, a hollow column is fixedly connected to the output end of the machine head, and a mounting rod is arranged on the outer side of the left end of the hollow column. A movable rod is rotationally connected to the front side of the hollow column, the rear end of the movable rod penetrates through the hollow column, a bidirectional screw rod is rotationally connected to the left side of the interior of the hollow column, belt wheels are fixedly connected to the middles of the outer sides of the bidirectional screw rod and the movable rod, and the two belt wheels are in transmission connection through the transmission belt. According to the mechanical arm, the belt wheel can be driven to rotate by rotating the movable rod, the two-way lead screw can rotate along with the movable rod, at the moment, the movable block can drive the L-shaped rod to move towards the middle, so that limiting and fixing of the mounting rod can be relieved, and at the moment, different mechanical arms can be replaced according to different working procedures.