566results about How to "Large adjustment range" patented technology

The invention discloses a pallet protection corner automatic putting machine. The pallet protection corner automatic putting machine comprises a top protection corner putting combination machine and aside face protection corner putting combination machine; the top protection corner putting combination machine comprises a bottom circulation base and a pair of top protection corner single machines,the side face protection corner putting combination machine comprises a bottom fixed base and four side face protection corner single machines, the top face protection corner single machines are provided with electrical control parts, top protection corner containing grooves, limiting mechanisms, and top protection corner mounting claws, the top protection corner mounting claws grab protection corners in the top protection corner containing grooves, and put the protection corners on four edges of the top of a packaging box, each side face protection corner single machine comprises a second electrical control part, a side protection corner containing groove, and a side protection corner mounting claw, and the side protection corner mounting claws grab the protection corners in the side protection corner mounting grooves and put the protection corners on the four sides of the side face of the packaging box. The pallet protection corner automatic putting machine is reasonable in layout,smooth in operation, high in adaptation, automatic in full process, free of artificial duty and capable of greatly improving protection corner putting and threading packaging capacity.

The invention discloses a long-distance high-pressure water delivery pipeline water hammer and leakage monitoring and positioning test device, which comprises a water tank, a water outlet side experiment unit, a water return side main path experiment unit and a water return side branch experiment unit, and is characterized in that the water outlet side experiment unit and the water return side branch experiment unit are communicated with the water return side main path experiment unit; the water outlet side experiment unit, the water return side main path experiment unit and the water return side branch path experiment unit are all communicated with the water tank. The device solves the problem that tiny leakage is difficult to monitor in the high-pressure water delivery process in the existing related test experiment technology, and the problems that the water hammer experiment signal precision acquisition is insufficient and the water hammer experiment causes impact damage to equipment. The invention further discloses a using method of the long-distance high-pressure water conveying pipeline water hammer and leakage monitoring and positioning testing device.

The present application relates to a method, device, storage medium and terminal for optimizing the drift rate of a rubidium atomic clock. The method comprises: collecting frequency difference data of the rubidium atomic clock relative to a reference signal; establishing a time-frequency difference model of the rubidium atomic clock according to the frequency difference data and the least squares method; and adjusting the output frequency of the rubidium atomic clock according to the time-frequency difference model and the voltage-frequency fitting relationship. The present application focuses on the frequency drift compensation technology for the aging of key components inside the rubidium atomic clock. By analyzing the drift rate characteristics of the rubidium atomic clock, it is proposed to adjust the accuracy of the output frequency of the rubidium atomic clock by adjusting the voltage-controlled voltage of the constant temperature crystal oscillator inside the rubidium atomic clock, thereby improving the drift rate of the rubidium atomic clock.

The invention discloses a high-precision digital display hydraulic self-centering bearing assembling device which comprises a base (1), a bearing seat positioning device (2) is assembled in the middle of the base (1), a fixed plate (9) is assembled above the base (1), a driving part is installed on the fixed plate (9), a movable plate (7) is assembled below the fixed plate (9), and a bearing pressing plate (6) is assembled on the bottom face of the movable plate (7). And a telescopic rod (17) of the driving piece drives the movable plate (7) to move up and down. The device is reasonable in design, the assembly precision is improved, and potential quality hazards caused after the bearing is obliquely pressed in are avoided; the operation difficulty and the labor intensity are reduced; a pressure value is automatically recorded, a pressure curve can be observed, and abnormity during bearing assembly can be found in time according to the pressure curve and the pressure value, such as over-tight or over-loose fit between a bearing chamber and a bearing, so that potential quality hazards are eliminated; and during product model changing, frequent replacement of the bearing seat positioning device is avoided.

The invention relates to the technical field of rocket engine tests, and discloses an energy liquid conveying and distributing system, which comprises an energy liquid storage tank, an energy liquid conveying device, an energy liquid distribution device and a control device, the gas extrusion subsystem is connected with the energy liquid storage tank, the gas extrusion subsystem is suitable for extruding energy liquid in the energy liquid storage tank, and the energy liquid is output from the energy liquid output port; the variable frequency pump is connected with the energy liquid output port; the variable-frequency pump adjusts the output flow of the energy liquid storage tank in a variable-frequency manner; the plurality of output branches connected in parallel are connected with the variable frequency pump; and the plurality of output branches respectively provide energy liquid for test pieces at different stations. The flow of the energy liquid is continuously adjusted through the variable frequency pump, smooth switching of the total flow of the energy liquid is achieved from the source, real-time smooth switching of the conveying flow and wide-amplitude change of the flow are achieved in combination with pressure control of the gas extrusion subsystem, and the device has the advantages of being wide in adjusting range and high in adjusting precision.

The invention discloses a landscape garden ecological maintenance device, and relates to the technical field of garden ecological maintenance, the landscape garden ecological maintenance device comprises a base, a water tank and a collection box, and further comprises an electric telescopic rod fixed on the front surface of the base through a support plate, and the output end of the electric telescopic rod is fixedly connected with a vertical plate; the spraying pipe is arranged on the front side of the water tank, and a plurality of sprayers are fixedly connected to the bottom of the spraying pipe. The landscape garden ecological maintenance device has the functions of spraying, mowing and recycling and cleaning, the functions are diversified, the working efficiency during maintenance is improved, use is more convenient, during spraying, an electric telescopic rod can drive the spraying pipe to adjust the height, and the spraying efficiency is improved. The angle of the spraying pipe is adjusted through the rotating assembly, the adjusting assembly can drive the spraying pipe to move, the spraying range of the spraying pipe is adjusted, the operation enables the adjustable spraying range to be larger, spraying can be conducted on different garden plants according to requirements, and using is more convenient and faster.

The present invention is applicable to the field of agricultural planting technology, and provides a peanut sowing device, including a device base, a walking unit, an assembly frame A, an assembly frame B, a reciprocating lifting mechanism, a transmission unit, a hole opener, a seeding device, an upper hopper, a discharge pipe A, a corrugated pipe, a discharge pipe and a discharge pipe C, and also includes: a core driving mechanism, the core driving mechanism is connected to a first blocking mechanism and a second blocking mechanism respectively, the second blocking mechanism is installed at the connection between the discharge pipe B and the discharge pipe C, and the second blocking mechanism is installed with a blocking member B and a blocking member C that are both matched with the discharge pipe B. In the peanut sowing device of the present invention, the first blocking mechanism and the second blocking mechanism can not only expand the adjustment range of the seeding frequency of the seeding device by cooperating with the reciprocating lifting mechanism and the core driving mechanism, but also allow the peanut seeds to be accurately sown from the bottom of the hole opener into the sowing hole, and prevent the peanut seeds from being sown outside the sowing hole.

The invention relates to the technical field of stone crushing, in particular to a jaw crusher and method for preventing crushed stone from rolling over, and the jaw crusher comprises a frame body structure and a transverse plate fixedly mounted on the frame body structure; the driving assembly is arranged on the frame body structure, a driving crushing mechanism connected with the driving assembly is arranged on the transverse plate, and an inclined jaw plate is connected to the driving crushing mechanism; the driven crushing mechanism is arranged on the frame body structure and connected with the driving assembly, and a vertical jaw plate is connected to the driven crushing mechanism; the follow-up pushing mechanism is arranged on the frame body structure and connected with the driven crushing mechanism, and the follow-up pushing mechanism can drive the vertical jaw plate to move in the direction close to or away from the inclined jaw plate when the driven crushing mechanism moves; the crushing regulation and control assembly is arranged on the transverse plate and connected with the active crushing mechanism, the inclined jaw plate and the vertical jaw plate can be controlled to move in the horizontal direction and the vertical direction, so that the friction force on stone is increased, and the crushing effect on the stone is improved.

The invention relates to the technical field related to surveying and mapping, and mainly discloses a portable surveying and mapping total station which comprises a bottom frame, a supporting frame and an instrument body, the bottom frame comprises a fixing sleeve, an assembling opening is formed in the side wall of the fixing sleeve, an adjusting frame is installed in the assembling opening, a supporting leg rod is hinged to one side of the adjusting frame, and an adjusting rod penetrates through the center of the interior of the fixing sleeve; and an adjusting disc is fixedly mounted at the bottom end part of the adjusting rod. The distance between every two adjacent supporting leg rods can be adjusted according to the actual situation, any supporting leg rod can be supported firstly when the ground is uneven, then the positions of the other supporting leg rods can be manually adjusted, stable supporting of the supporting frame and the instrument body is achieved, and the working efficiency is improved. And the adjustment of the adjusting block is realized through mutually meshed bevel gears, so that the subsequent position adjustment of the supporting leg rod is not hindered, and meanwhile, the self-movement of the adjusting block cannot be easily realized.

The invention discloses a switching power supply and an overvoltage protection method thereof, the switching power supply comprises a main power tube, a freewheeling tube, a center tap inductor and an overvoltage protection circuit, and the overvoltage protection circuit comprises an input sampling unit for sampling a voltage on a sampling point of the switching power supply to obtain an input sampling voltage representing an input voltage; and the overvoltage control unit is used for performing overvoltage protection on the switching power supply according to the duty ratio, the input sampling voltage and the reference voltage. The center tap inductor is connected with the main power tube and the follow current tube, the overvoltage protection threshold value is adjusted by adjusting the position of the center tap end in the center tap inductor, and the overvoltage protection threshold value is the output voltage when overvoltage protection is triggered. According to the overvoltage protection circuit, the center tap inductor is added in the switching power supply, and the position of the center tap end in the center tap inductor is randomly adjustable, so that an overvoltage protection threshold is continuously adjustable, the range of an overvoltage protection point is enlarged, the voltage protection range is widened, and the overvoltage protection capability is improved.

The utility model discloses a tripod for mobile phone shooting, which relates to the technical field of mobile phone supports, comprises an outer tube and an inner tube, and is characterized in that a placing block is arranged above the inner tube, a guide rod is fixedly mounted above the placing block, a pressing block is sleeved on the outer wall of the guide rod, and the outer wall of the pressing block is fixedly connected with the inner tube. A first spring is fixedly connected between the placing block and the pressing block, a sliding rod capable of sliding is installed on the side face of the placing block, a clamping plate is installed on the top face of the sliding rod, and a second spring is connected between the clamping plate and the side wall of the placing block; according to the mobile phone fixing device, the two first springs and the two second springs are arranged to be matched with the square grooves, so that the mobile phone can be limited in the direction of the supporting frame, compared with a traditional fixing device, the mobile phone fixing device is more stable in fixation, and the probability that the mobile phone falls off after being fixed is reduced.

The invention provides a multi-hob rotary conical surface rock breaking test device and method, and relates to the hob cutting technology, the multi-hob rotary conical surface rock breaking test device comprises a shaping structure, a trowelling structure and a cutterhead structure, the cutterhead structure is used for containing concrete, the trowelling structure is provided with a rotary lifting assembly and a scraper, and the horizontal angle of the scraper is variable; the rotary lifting assembly drives the scraper to rotate, so that the upper surface of concrete is stricken to form a conical surface, the cutterhead structure is provided with a hobbing cutter with a variable hobbing cutter inclination angle, and the cutterhead structure and the concrete can rotate relatively, so that rotary conical surface rock breaking of the hobbing cutter is simulated; according to the multi-hob conical surface rock breaking test device, manufacturing of the conical surface rock surface and adjustment of the positions and angles of the hobs are integrated in one device, a multi-hob conical surface rock breaking test can be achieved, the cone angle of the rock surface, the angles of the hobs and the distance between the hobs can be flexibly adjusted before the test, and the multi-hob conical surface rock breaking test device is used for exploring rock breaking performance under different test conditions. In addition, the inclination angle of the hob can be flexibly adjusted, and the adjusting range is larger.

The embodiment of the invention provides an optical imaging device, which comprises a shell with an accommodating space, and the top wall of the shell is provided with a through hole; the lens is fixed on the top wall of the shell and covers the through hole; the image sensor assembly is arranged in the accommodating space, and the image sensor assembly comprises an image sensor chip and a bracket for bearing the image sensor chip; the elastic supporting piece is arranged in the accommodating space, and the elastic supporting piece is connected with the bottom wall and the bracket so as to suspend the image sensor assembly in the accommodating space; the driving assembly is arranged in the containing space, observed in the optical axis direction of the lens, the driving assembly and the image sensor chip are at least partially overlapped, the driving assembly comprises a magnetic circuit system and a driving coil arranged opposite to the magnetic circuit system, and one of the driving coil and the magnetic circuit system is fixed to the support; the other one of the driving coil and the magnetic circuit system is fixed on the bottom wall of the shell, and the driving coil and the magnetic circuit system are matched to drive the image sensor assembly to move in the direction perpendicular to the optical axis of the lens.

The invention relates to a graphene composite conductive glass fiber material and a preparation method and application thereof, the graphene composite conductive glass fiber material comprises a conductive composite film and a glass fiber material substrate, the composite film conformally coats the surface of the glass fiber material substrate, and the composite film is composed of graphene and an amorphous carbon material. According to the invention, the strength of the composite film coating the glass fiber tows is improved, the composite film is not easy to fall off, the compactness and water resistance in the film are increased, the shear strength is greatly improved, and the adjustment range of surface resistance can be expanded.

The invention discloses an operation control method for a direct expansion type refrigerating unit. The operation control method comprises the following steps that firstly, whether a compressor breaks down or not is detected; step 2, detecting whether frequency reduction protection is needed or not; 3, calculating a load according to a PID algorithm; fourthly, the direct expansion type refrigerating unit is controlled to operate according to detection and calculation results in the first step to the fourth step; by automatically adjusting the frequency of the compressor, the problems of part damage and large air outlet temperature fluctuation caused by frequent starting / stopping of the direct expansion section can be avoided, automatic operation of the direct expansion type air conditioning unit system can be achieved in the stopping state, loading or frequency reduction is carried out on the compressor by calculating the load, and the working efficiency is improved. The stability of the system and the operability of the unit system are improved; the rotating speed of the condensation fan / the evaporation fan is controlled through the condensation temperature and the evaporation temperature, the indoor temperature is accurately controlled, temperature fluctuation is reduced, meanwhile, the service life of the compressor can be prolonged, intelligent operation control is provided, and the operation process is simplified.

The invention discloses a drilling machine power head speed change structure which comprises a shell, a top plate is arranged at the top of the shell, a first speed change device is arranged on one side in the shell, a second speed change device is arranged on the other side in the shell, a speed change bin is arranged above the second speed change device, a stabilizing bin is arranged below the second speed change device, and a partition plate is arranged between the speed change bin and the stabilizing bin. A hydraulic motor is arranged in the center of the rotating sleeve, a sleeve gear is arranged on the outer side of the middle of the rotating sleeve in a surrounding mode, and hydraulic sleeves are arranged at the upper end and the lower end of the rotating sleeve. The two-stage speed change structure has the beneficial effects that torque can be superposed or reduced through relative rotation, the torque change range is enlarged, meanwhile, speed change is more uniform and reliable through cooperation of the stepless speed change type structure and the hydraulic motor, meanwhile, stability of the output torque of the motor is guaranteed, and the service life of the motor is prolonged. The drilling machine has the advantages of a motor drilling machine and a hydraulic drilling machine.

The invention discloses a mutual coupling improved microwave and millimeter wave common-aperture antenna based on electromagnetic band gap multiplexing, particularly relates to the technical field of microwave and millimeter wave communication, and solves the problems that most of microwave and millimeter wave common-aperture antenna design schemes in the prior art cannot apply a microwave MIMO (Multiple Input Multiple Output) technology; in the prior art, MIMO application is not taken into collaborative design consideration, a solution for MIMO performance loss caused by mutual coupling and the like is lacked, and due to the restriction between microwave and millimeter wave antenna designs, the technical problems of bandwidth reduction, gain reduction, beam forming capability deficiency and the like of sub-antennas are difficult to avoid; according to the technical scheme, extra functions are achieved by multiplexing millimeter wave antennas, mutual coupling between microwave MIMO antennas is restrained, and then the MIMO performance enhancement effect is achieved; the performance of the millimeter wave antenna is reinforced by multiplexing the structure of the microwave antenna part; according to the invention, the performance of the dual-band antenna is improved on the premise of avoiding performance loss.

The invention discloses a method for detecting the adsorption capacity of a hydrogen adsorbent. The method comprises the following steps: S1, preparing equipment; s2, placing the adsorbent to be tested on an electronic balance, recording the mass of the adsorbent weighed by the electronic balance at the moment and recording the mass as g1; s3, after the vacuum degree in the test bin is higher than the vacuum degree to be measured and is stabilized, closing the valve and the regulating valve I; s4, opening the hydrogen cylinder, and controlling to open and finely adjust the regulating valve I, so that the vacuum degree in the test bin is always maintained at the set vacuum degree to be measured; s5, when the reading of the electronic balance is stable and unchanged and the reading of the mass flow meter is zero, the controller controls to close the regulating valve I, adsorption quantity measurement under the set vacuum degree is ended, the mass of the adsorbent weighed by the electronic balance at the moment is recorded and recorded as g2, and the accumulated flow of the mass flow meter is recorded; g2-g1 is the hydrogen absorption amount of the adsorbent under the vacuum degree. The device has the advantage of being capable of measuring the adsorption capacity of the hydrogen adsorbent under the specific equilibrium pressure.

The utility model discloses a magnetorheological damper capable of effectively improving damping force, and particularly relates to the technical field of magnetorheological dampers, which comprises an outer cylinder, an inner cylinder, an upper end cover, a lower end cover, a damping gap and a piston rod. According to the magneto-rheological damper capable of effectively improving the damping force, the permanent magnet ring is arranged outside the inner cylinder, the magnet exciting coil is arranged outside the permanent magnet ring, and when the magneto-rheological damper works, the permanent magnet ring can effectively enhance a magnetic field generated when current passes through the magnet exciting coil, so that the damping force of magneto-rheological fluid in a working state can be improved, and the damping force of the magneto-rheological fluid is improved. According to the magnetorheological damper, the maximum damping force is larger than that of a traditional magnetorheological damper, the damping force of the damper is large in adjustable amplitude, meanwhile, the maximum value of the damping force is increased, meanwhile, the magnetorheological damper is simple in structure, the outer cylinder and the inner cylinder are detachably connected, later maintenance and replacement of parts and magnetorheological fluid are facilitated, and the magnetorheological damper is suitable for large-scale popularization and application. Repeated utilization is achieved, resources and cost are saved, and assembling of the magnetorheological damper is simplified.

The utility model relates to the technical field of medical equipment, in particular to a negative pressure device for adjuvant therapy of cardiac severe illness, which comprises a mounting plate and a negative pressure aspirator mounted on the upper end face of the mounting plate, sliding rails are fixedly connected to the left side and the right side of the lower end face of the mounting plate, and sliding blocks are slidably connected to the outer walls of the two sliding rails. A lead screw is rotationally connected between the two sliding blocks, the outer wall of the lead screw is movably connected with a movable block, the bottom end of the movable block is fixedly connected with a connecting rod, the two sliding blocks slide front and back to drive the negative pressure opening to move in the front-back direction, the lead screw is driven to rotate when the motor is started, and the lead screw drives the movable block on the outer wall of the lead screw to move left and right. Therefore, the negative pressure port can be driven to horizontally move left and right, flexible adjustment of the position of the negative pressure port is achieved, the adjusting range is wide, after position adjustment, the electromagnet is started, the electromagnet is attracted and fixed to the metal plate at the top end, the position of the negative pressure port is fixed, follow-up negative pressure attraction work is facilitated, fixing is convenient, and operation is convenient.

The invention discloses a lamp adjusting method and device, a storage medium, electronic equipment and a lamp. The method comprises the following steps: determining an illumination mode of a lamp; according to the illumination mode, determining an on-site visual color preference degree and a live scene color preference degree, the on-site visual color preference degree being used for indicating a color preference degree of an illumination light source generated by a lamp in a real environment, and the live scene color preference degree being used for indicating a live scene color preference degree; the live broadcast scene color preference degree is used for indicating the color preference degree of an illumination light source generated by the lamp in the live broadcast scene; determining a target parameter value of a target spectrum parameter of the lamp based on the on-site visual color preference degree and the live scene color preference degree; and adjusting the lamp based on the target parameter value. According to the invention, the technical problems of small lamp adjustment range and poor lamp adjustment effect caused by incomplete consideration factors during lamp adjustment in the prior art are solved.

The utility model discloses an angle measuring device for building detection, which relates to the technical field of building measuring devices and comprises a base column, a support device is arranged on the base column and comprises an angle measuring and adjusting unit and an angle measuring instrument fixing unit, and the angle measuring and adjusting unit comprises a fixing base. Three sets of hanging grooves are formed in the fixed base, hinge shafts are arranged in the hanging grooves, hinge blocks are arranged in the middles of the hinge shafts, supporting legs are arranged at the bottoms of the hinge blocks, sleeving blocks are arranged on the supporting legs, and connecting plates are arranged on the sides, close to the foundation columns, of the sleeving blocks. According to the angle measuring instrument fixing unit, the sleeving block slides on the supporting legs and is fixedly connected with the connecting plate on one side, so that the included angle radian between the three supporting legs and the fixing base is controlled through sliding of the sleeving block on the supporting legs, the height measurement of the angle measuring instrument fixing unit is completed, the height adjusting range is large, and the angle measuring instrument fixing unit is convenient to use. Therefore, the whole device can cope with a complex measurement environment.

The invention discloses an automatic balancing and attitude adjusting type underwater robot, relates to the field of underwater robot control, and aims to solve the problem that an underwater robot is difficult to give consideration to the functions of automatic buoyancy adjustment, attitude control and rapid floating at present. The device comprises a main machine body, a power unit, a control unit, a detection unit, a buoyancy regulation and control unit and a standby power supply, according to the technical scheme, the buoyancy regulation and control unit is regulated in real time through PID control on the basis of attitude data and depth gauge information, buoyancy autonomous balancing of the underwater robot under different loads is ensured, and the tedious balancing weight adjusting process in traditional manual balancing is avoided. During high-speed movement, the automatic balancing and attitude adjusting system can finely adjust the pitch angle and the roll angle of the underwater robot, stably maintain high-speed operation and cooperate with the propeller system to achieve better dynamic response. In addition, the system further has the function of quickly floating through the standby power supply and the buoyancy regulation and control unit under the out-of-control or power-off condition, and the safety of the robot is guaranteed.

The application discloses a display device, comprising a display device and a camera device, the camera device is fixed to the display device, the camera device comprises a rotating support and a camera module, a mounting piece of the rotating support is fixed on the back surface, one end of a first rotating piece of the rotating support is hinged to the mounting piece, one end of a second rotating piece of the rotating support is hinged to the other end of the first rotating piece. The camera module is hinged to the other end of the second rotating piece, and the camera module is configured to move relative to the mounting piece under the rotation of the rotating support. The two ends of the first rotating piece and the second rotating piece hinged to each other are provided with avoiding structures, the avoiding structures are configured to avoid the relative rotation of the first rotating piece and the second rotating piece, so that the angle of the relative rotation of the second rotating piece and the first rotating piece is not less than 180°. The display device of the application can make the adjustable range of the camera device relative to the display device larger, and then adapt to display devices of various thickness sizes.

This invention proposes an active energy storage type multi-winding transformer-type adjustable reactor and its control method, belonging to the technical field of power electronics and flexible AC transmission and distribution systems. It includes a multi-winding transformer, whose primary winding is electrically connected to the AC power grid; at least one set of thyristor hierarchical switching circuits, which are connected in series with the corresponding thyristor-switching windings on the secondary side of the multi-winding transformer; the AC side of a PWM inverter control circuit is electrically connected to one of the active control windings on the secondary side of the multi-winding transformer; an energy storage module is connected in parallel on the DC side of the PWM inverter control circuit to inject a compensation current containing reactive and active components into the active control winding, thereby achieving continuous fine-tuning of the equivalent reactance value and active power exchange with the AC power grid. This invention can be applied as a multifunctional power electronic device in fields such as smart grids, new energy transmission and distribution, and comprehensive power quality management.

The invention discloses a preparation method of few-layer MXene coated titanium composite powder. According to the preparation method, titanium or titanium alloy powder is taken as a matrix, and the surface of the powder is uniformly coated with an MXene material with a nanometer two-dimensional lamellar structure by adopting a wet ball-milling process matched with an MXene intercalation technology. The preparation method has the advantages that the MXene structure and the original powder shape are not damaged, the number of introduced impurities is small, the number of layers of MXene is small, and the MXene coating layer has the advantages of being complete in structure, small in number of layers, low in impurity content, high in binding force with a titanium powder matrix and the like, and the application prospect is good.

The ball joint connecting frame comprises an upper carrying table, a lower pressing plate, a ball head hinging piece, a connecting screw and a locking spiral wrench, a hinging rod is driven to rotate in a three-dimensional mode through ball head three-dimensional rotation of the ball head hinging piece, and therefore three-dimensional angle direction adjustment of a foot pipe hinged to the hinging rod is achieved. Compared with a conventional tripod foot tube which can only be adjusted in a telescopic mode to achieve leveling, the adjustable freedom degree of the tripod foot tube is further increased, the adjusting range is larger, the leveling requirement of the tripod can be better met, the tripod foot tube is locked and fixed through the ball head after leveling, operation is easier and more convenient, and the fixing effect is more stable.

The utility model discloses a double-sided fly cutter which is composed of a large cutter head handle, a double-sided fly cutter head and a cutter head. The whole double-sided fly-cutter disc is of a disc-shaped structure, the upper face and the lower face of the double-sided fly-cutter disc are each provided with a set of cutter grooves, and a reserved hole is formed in the middle of the double-sided fly-cutter disc along the axis position. A mounting table is arranged on the face, in butt joint with the large cutter head handle, of the double-face fly cutter head, a mounting hole is formed in the mounting table, and an arc-shaped edge is arranged at the joint of the mounting table and the reserved hole. A boss matched with the mounting table and the arc-shaped edge is arranged at the top of the large cutter head handle, a threaded hole matched with the mounting hole is formed in the boss, and the double-sided fly cutter head is fixedly arranged on the large cutter head handle through a screw; the tool bit is fixedly arranged in the tool groove through the pressing block. The mounting table is arranged on the double-sided fly-cutter head, the mounting table is connected with the large cutter head handle, and the reserved hole in the center of the double-sided fly-cutter head is vacated for mounting and adjusting the cutter head, so that the adjusting range of the cutter head is larger, and the cutter head is suitable for more workpieces.

The invention belongs to the technical field of hydraulic auxiliary braking of engineering machinery, and particularly discloses a CST function-based retarder bent blade parameterization modeling method, which comprises the following steps of: constructing a unit blade bone line and a unit blade thickness distribution curve by using a CST function, and designing a curve according to a circulating circle; superposing the unit thickness distribution curve on a unit blade bone line to construct a unit blade suction surface and pressure surface curve, and finally, performing rotation scaling operation on the unit blade curve to obtain a real curved blade curve. And finally, mapping the two-dimensional blade molded line to a three-dimensional space through conformal transformation to construct a three-dimensional blade entity of the hydraulic retarder and a three-dimensional impeller model of the hydraulic retarder. According to the method, the functions of rapid design of the blade profile of the retarder, rapid wide-range adjustment of the braking performance and high braking power density design can be achieved, and rapid development and industrial application of the retarder in the braking field can be accelerated.