130results about How to "Precise angle adjustment" patented technology

The invention relates to an external high-definition on-site law enforcement recorder. The recorder has the advantages of simple structure, convenient use, capability of imaging with high definition, convenient image playback, easy correction of camera shooting direction and the like. The structure of the recorder is that: a driving control circuit and a battery are arranged in a shell; the shell is externally connected with a high-definition camera through a connecting wire; the high-definition camera is connected with the driving control circuit and is provided with a corresponding movable filtering device and a lens direction aligning and imaging deflection correcting device; the driving control circuit is also connected with a wireless transmitting device; and the shell is provided with a data interface which is connected with the driving control circuit.

A wear resistant coating is applied on an elbow or S-bend by weld beads applied along a pipe. A rectangular support rod is attached inside the pipe by connectors so that wheels of the carriage are guided on the corners to maintain a fixed orientation relative to the support rod. A three axis robot arm carries an electric welding head so as to be able to dynamically adjust the head both angularly and radially. A welding wire is pulled to the head by a feeding system on the carriage. The weld parameters including a predetermined wire stick out and angle of wire attack are controlled. A drive motor carried by a drive carriage propels the drive carriage longitudinally along the support rod with a series of intermediate carriages.

The invention discloses a reshaping device for metal steel processing. The reshaping device for metal steel processing comprises a workbench. A support is fixedly connected to the workbench. An installation groove is formed in the upper end of the workbench, multiple conveying rollers are connected with the interior of the installation groove in a rotating mode, and a transmission mechanism is arranged among the multiple conveying rollers. A driving motor is installed on the front side of the workbench, a first gear is fixedly connected with the output end of the driving motor, a second gear is installed on the workbench, and the second gear and the first gear mesh with each other. An adjusting mechanism is fixedly connected to the second gear, the adjusting mechanism and the second gear are coaxial, and the adjusting mechanism and the transmission mechanism are connected with each other through a transmission belt. The reshaping device for metal steel processing is reasonable in structure, cutters can be bent into a whole, and therefore the steel plate bending efficiency is greatly improved, the labor workload of a worker is also reduced, steel plates can be subjected to adjustable equal-length cutting operation, the practicability is high, the steel plate bending angle can also be adjusted, and the function is powerful.

The invention relates to an inbuilt high-definition on-site law enforcement recorder which has the advantages of simple structure, convenient use, high-definition imaging, convenient image playback, easy shooting direction correction and the like. The structure is as follows: the inbuilt high-definition on-site law enforcement recorder comprises a case; a driving control circuit and batteries are arranged in the case; a high-definition camera is arranged in the case, is connected with the driving control circuit and is provided with a corresponding movable filter device and a lens direction aiming and imaging deflection correction device; the driving control circuit is connected with a wireless transmission device; and the case is provided with a data interface which is electrically connected with the driving control circuit.

The invention relates to the field of surveying and mapping equipment, in particular to a surveying and mapping instrument adjusting device for engineering. The device comprises a horizontally arranged supporting mounting plate, wherein a storage battery is horizontally arranged at the lower side of the supporting mounting plate, a supporting mounting cylinder is vertically arranged at the upper end of the supporting mounting plate, limiting rotating grooves are formed in the edge of the supporting mounting plate, a plurality of limiting rotating columns are arranged at equal angles in cooperation with the limiting rotating grooves, the outer ends of the limiting rotating columns are all provided with rotating supporting columns, and a lifting mounting cylinder is arranged right above thesupporting mounting cylinder. The device can be subjected to multi-angle support adjustment through a turning swing supporting structure, support under a complex working environment is adapted, and asurveying and mapping instrument is always in an optimal station state; the height adjustment process of the device is stable through a lifting structure of threads and screw rods and in cooperation with a lifting guide structure; and gear engagement is used for transmission, and in cooperation with rotating coupling power supply, the angle adjustment process of the surveying and mapping instrument is accurate, and the power supply process is continuous and stable.

The invention provides a movable vehicle-mounted automatic deep well rescue device, which comprises a trailer, a support seat, an upper computer, a PLC (programmable logic controller) control cabinet, a power supplying power source, a cantilever, a multistage telescopic hydraulic cylinder and a hydraulic pump, wherein the support seat is arranged on the trailer, the cantilever is arranged on the support seat, the multistage telescopic hydraulic cylinder is arranged at the end part of the cantilever end, the hydraulic pump drives the multistage telescopic hydraulic cylinder, the top end of the multistage telescopic hydraulic cylinder is provided with a bracket mechanism, and the PLC control cabinet controls and connects an electric control valve of the hydraulic pump and the bracket mechanism. The movable vehicle-mounted automatic deep well rescue device has the advantages that the design is scientific, the rescue speed is high, the automation degree is high, the operation is simple, and flexibility is realized.

The invention discloses a novel movable jaw integrated crushing station. A feeding machine, a belt type secondary conveyor, a jaw primary crushing device and a belt type primary conveyor are sequentially arranged on a carframe to form the integrated crushing station, so that a control system can control all mechanisms in a centralized manner, the crushing station action is more coordinated, and the intelligent degree is high through applying an intelligent control system; the crushing station has the self-walking and 360-degree rotation function, can realize fast site change and can respond tothe challenge of different complicated sites to conveniently rotate the crushed material to the position of a loading vehicle; a rotary chassis of a lower vehicle assembly is arranged to a structurethat hydraulic driving and electric driving are mutually cooperated; a hydraulic driving carframe greatly rotates; and a second driving motor drives the carframe to slightly adjust through gear meshing, so that precise angle adjustment is realized, and the discharging hole of the belt type primary conveyor and a conveying vehicle are aligned with each other.

The invention discloses a robot for precise assembling. The robot for precise assembling comprises a base, a rotary table, a large arm, a small arm, a wrist joint, a front end rotational joint and a pneumatic clamping device. The rotary table is rotationally installed on the base. One end of the large arm is hinged to the rotary table, and the other end of the large arm is hinged to one end of the small arm. The other end of the small arm is hinged to one end of the wrist joint, and the front end rotational joint is rotationally installed at the other end of the wrist joint. The pneumatic clamping device is installed at the outer end of the front end rotational joint. A rotary table ball screw driving mechanism used for driving the rotary table to rotate is installed on the base, a large arm ball screw driving mechanism used for driving the large arm to rotate is installed on the rotary table, a small arm ball screw driving mechanism used for driving the small arm to rotate is installed on the large arm, a wrist joint driving mechanism used for driving the wrist joint to rotate is installed on the small arm, and a front end joint driving mechanism used for driving the front end rotational joint to rotate is installed on the wrist joint. The robot for precise assembling is stable in transmission, high in positioning precision and production efficiency, long in service life and wide in application range.

The invention belongs to the technical field of water pump manufacturing, and particularly relates to a water pump impeller surface finish machining method. The method includes the following steps offirstly, immersing a cast water pump impeller in grinding liquid, placing the water pump impeller onto a machine tool so that the circumferential surfaces of a front cover and a rear cover of the water pump impeller can be ground; secondly, grinding blades of the ground water pump impeller; and thirdly, clamping the ground water pump impeller on a water pump impeller surface fine machining deviceso that the blades of the water pump impeller can be polished. By means of the water pump impeller surface fine machining device in the third step, the blades are polished, the blade surface machiningprecision uniformity is improved, the stability of the water pump impeller in the machining process is improved, and machining precision is further improved.

An apparatus (1) for pivotal fastening of an active surface, in particular a spoiler (3) on a wind tunnel model of an aircraft, comprising a bearing block (2) and a strip (22) accommodated pivotally thereon on a shaft (21), wherein the strip (22) is connected to the active surface, characterized in that the strip (22) is operatively connected to a clamping block (10) and the clamping block (10) can be connected to the bearing block (2) for locking the active surface in an arbitrary angular position (28, 29) of the spoiler (3) between −10° and +45°. Since the operative connection is preferably formed with a ring gear segment (23) disposed underneath the strip (22), which is continuously intermeshed with a rack (19) formed on the clamping block (10), a highly precise adjustment of the angular position (28, 29) of the spoiler (3) is possible. An angular position (28, 29), once set, can be locked very securely against uncontrolled adjustments by fixing the clamping block (10) in the bearing block (2) by means of at least two fastening means, in particular with screws. The lack of sensitivity to undesirable adjustment movements of the spoiler (3) is obtained in particular from the self-inhibiting configuration of the toothing. As a result of the comprehensive adjustability of the apparatus (1), a comprehensive storage of aerodynamic active surfaces with individual adjustment angles is superfluous and at the same time, the retrofitting expenditure is reduced.

The invention relates to a vehicle body aerodynamic performance test generating system and a test method. The system comprises a test board, a test device and a blowing device, wherein a square slot is arranged on a middle portion of the test board; the test device is installed in the square slot arranged in the test board; the blowing device is arranged on the top of the right end of the test board; the test device comprises a gravity scale, a detection bottom board, a support board, a blocking frame, a screw motor, a screw, an inner strut, a flap mechanism, a test mechanism, a guiding body and a screw connection board; the blowing device comprises an arc support board, a curved moving block, a wind cylinder, a moving motor, a moving rotation shaft, a rotating gear and a rotation shaft connection board. The problems the existing vehicle aerodynamic test can not perform accurate positioning for different vehicles, the wind power detection result is inaccurate, a wind direction cannot be adjusted, a detection value can not be intuitively displayed and the like can be solved.

The invention relates to a simple earth surface bidirectional reflectance measurement support and a measurement method. The simple earth surface bidirectional reflectance measurement support comprises an angel scale, a probe supporting arm, a probe position monitoring device and a measurement device, wherein the angel scale comprises an arc rod, a bottom cross bar, a rotating fulcrum and an angle fixing clip, angle scale marks are evenly arranged on the edge of the arc rod, the angle fixing clip is fixed on the edge of the arc rod, the rotating fulcrum is located in the center of the arc rod, and the arc rod is fixed above the bottom cross bar; the probe supporting arm comprises a an L-shaped supporting arm and a probe box, a long rod of the L-shaped supporting arm is connected with the angle scale in a rotating mode through the rotating fulcrum, and the probe box is installed on a short rod of the L-shaped supporting arm. The simple earth surface bidirectional reflectance measurement support has the advantages that the angel scale and the probe supporting arm can rotate freely within the range of a 360-degree azimuth angle on the horizontal plane and within the range of a 180-degree observation angel on the vertical plane, angle adjustment can be achieved freely and accurately, manufacturing cost is low, operation accuracy is reliable, and the measurement support is simple and convenient and fast to use.

The invention discloses a detachable endoscope anastomat, and the endoscope anastomat comprises a fixed handle, an adjusting shifting piece and a drying mechanism; a movable handle is rotatably connected to the left side of the bottom of the fixed handle, the adjusting shifting piece penetrates through a dial to be rotatably connected to a connecting sleeve, and a first gun barrel is fixed to the left end of the connecting sleeve; the left end of the first gun barrel is connected with a second gun barrel in a clamped mode, the left end of the second gun barrel is rotationally connected with a nail bin base, and the drying mechanism is clamped on the protective cover. According to the detachable endoscope anastomat, when the second gun barrel and the first gun barrel are connected together in a left-right clamped mode through the connecting rod and the connecting block, the second arrow indication mark corresponds to the first arrow indication mark, and then the second gun barrel is manually rotated till the second arrow indication mark corresponds to the rotation in-place indication mark; at the moment, the sliding block slides in place in the second sliding groove, the locking effect is conveniently achieved, and after the device is used and the operation is reversely repeated, the second gun barrel and the first gun barrel can be detached.

A gear mechanism with a sun gear and a ring gear is provided, where the sun gear and the ring gear are arranged coaxial relative to a gear axis of rotation, and with a transmitter element and an actuating device. The transmitter element comprises a revolving transmitter ring which is arranged eccentric relative to the gear axis of rotation and in sections engages with the sun gear and the ring gear. The actuating device comprises a wobble body, where the revolving transmitter ring is movable by the wobble body eccentrically about the gear axis of rotation in order to move the sun gear and the ring gear relative to each other. A cam phaser for an internal combustion engine having such a gear mechanism is also provided.

The invention discloses a pneumatic-transport lobster bait casting machine applied to a deep sea net cage. The machine comprises the deep sea net cage and a bait casting pipe disposed at the center ofthe top of the cage, wherein a material uniformizing device is disposed on the bottom of the bait casting pipe, the material uniformizing device comprises a casting disk, casting disk baffles are uniformly disposed on the top of the casting disk, a semi-circular shell is disposed at the center of the top of the casting disk, the semi-circular shell is connected to external torque, a bait recoverydevice is installed on the inner wall of the bottom of the deep sea net cage, the bait recovery device comprises a silt storage body, a motor is installed on the side wall of the top of the deep seanet cage, an output shaft of the motor is movably connected to a lead screw by a coupler, the lead screw is sleeved by a lead screw nut sleeve outside, a guide rod is also fixed by welding on the sidewall of the top of the deep sea net cage, and the silt storage body is disposed between a slide sleeve and the lead screw nut sleeve. The machine is characterized by a feed recovery function and goodcleaning effects.

The invention discloses a valve stem of a flow regulating shut-off valve in the technical field of shut-off valves. The valve stem comprises a valve body; a fixed ball is arranged in the center of aninner cavity of the valve body; the fixed ball is a hollow sphere; the outer walls of the left and right sides of the fixed ball are provided with holes; a rotary ball is movably arranged in the innercavity of the fixed ball; the inner cavity of the rotary ball is provided with a through hole; the through hole and the holes are located in the same horizontal line; the top of the rotary ball is provided with a valve stem body; the top end of the valve stem body extends to the outer wall of the top of the valve body; the outer wall of the top of the valve body is provided with a mounting seat;the outer walls of the left and right sides of a sleeve are provided with connecting rods; and the ends, away from the sleeve, of the connecting rods are connected with positioning rods. By rotating arotary plate, the valve stem body drives the rotary ball to rotate, thus, the holes and the through hole coincide, by changing the coincidence angle of the holes and the through hole, the flow of theshut-off valve is changed, and thus the flow of the shut-off valve can be adjusted as demanded.

The invention discloses a cold header clamping device of hardware fitting producing of industrial automation equipment, which comprises a support frame. A circular slide groove is arranged on the topof the support frame, and a circular hollow rotary cylinder is arranged right below the support frame. The top of the circular hollow rotary cylinder is connected with a circular sliding groove through an annular slide block. The two ends of the inner wall of the circular hollow rotary cylinder are provided with connecting bulges. The connecting bulges are flexibly connected with a left clamp armand a right clamp arm through a pin shaft, and the inner part of the circular hollow rotary cylinder is provided with a drive cylinder. The output end of the cylinder is connected with a drive shaft,and a horizontal adjusting plate is arranged right below the driving shaft. The top of the horizontal adjusting plate is provided with a connecting block, wherein the connecting block and the drivingshaft are connected by a rotary bearing. Adjusting sliding blocks are arranged at both ends of the horizontal adjusting plate, and the inner sides of the top of the left clamp arm and right clamp armare provided with adjusting sliding slot matched with the adjusting sliding block. The cold header clamping device of hardware fitting producing of industrial automation equipment has the advantages of greater clamping force, preventing the accessories from falling off in the process of clamping, and at the same time making precise angle adjustment of accessories.

The invention relates to a safe and reliable facial recognition ATM device. The device comprises a device body and a detecting mechanism. A display screen, a cash outlet, a card slot, a groove, a veinbox and a plurality of keys are arranged on the device body.A photographing mechanism is arranged in the groove, a collecting mechanism is arranged in the vein box, the collecting mechanism comprisesa sensing assembly and a collecting assembly, the collecting assembly comprises an image sensor, a protective hood and two emission units, the emission units comprise lamp tubes, lamp hoods, direction adjusting rods and direction adjusting units, and the photographing mechanism comprises a camera, a sleeve tube, a framework, a driving assembly and two adjusting assemblies. According to the ATM device, collecting imaging is conducted on a palm vein through the collecting mechanism, vivo detection is achieved to prevent other people from personating facial images of a user to operate an ATM, the properties of the user are protected, moreover, the angle of the sleeve tube is adjusted through the photographing mechanism, and the camera faces directlythe face of the user to collect images fromthe front side to improve the accuracy of facial recognition and the practicability of equipment.

The invention discloses a testing platform mechanism of a high-speed horizontal type stripping force testing machine. The testing platform mechanism of the high-speed horizontal type stripping force testing machine comprises a first base, a testing platform articulated with one end of the first base and located above the first base, an angle adjustment module mounted between the first base and thetesting platform and used for supporting and positioning the testing platform and an angle display module arranged on an articulation part between the first base and the testing platform, wherein thefirst base is mounted on a servo motor driving mechanism and is exposed out of the upper end surface of a machine seat; a first pressing plate and a second pressing plate used for clamping steel plates pasted by products to be tested are arranged on the platform surface of the testing platform; the testing platform is capable of adjusting an angle relative to the first base through the angle adjustment module and is also capable of visually seeing the adjustment angle value in real time through the angle display module. The testing platform mechanism is extremely convenient and relatively simple to operate; meanwhile, the angle adjustment is relatively accurate, so that the testing platform mechanism has extremely high market competitiveness.

The invention provides a chain type angle-adjustable lifting device for overall disassembly and assembly of an air cylinder unit. The chain type angle-adjustable lifting device comprises an adjustingmechanism, a force applying mechanism, an anti-rotation self-locking mechanism, an intermediate shaft and a lifting support. The adjusting mechanism comprises a gear set, a chain, a fixing plate and agravity center fine adjustment assembly. The gear set is fixed to the middle of the lifting support through the intermediate shaft. The chain is engaged with the gear set. The fixing plate is fixedlyconnected with one end of the chain. The gravity center fine adjustment assembly is fixedly connected with the other end of the chain. The force applying mechanism penetrates through the first side of the lifting support to be connected with the gear set in an engaged mode. The anti-rotation self-locking mechanism penetrates through the second side of the lifting support to be connected with thegear set in an engaged mode. According to the chain type angle-adjustable lifting device, the air cylinder unit can be independently disassembled and assembled without the help of adjacent cylinders,and the chain type angle-adjustable lifting device is light, small, exquisite, safe, reliable, accurate in angle adjustment and capable of being operated by one person.

The invention discloses multimedia equipment used for smart home. The multimedia equipment structurally comprises an installing shaft, an installing plate, a main body, heat dissipation holes, a protective cover, a camera, adjusting buttons, a control panel, an adjusting knob, a switch and a rotating device; wherein the installing shaft is embedded into an upper surface of the rotating device, a bottom surface of the rotating device is welded with an upper surface of the main body, the heat dissipation holes are embedded in an outer surface of the main body, the control panel is adhered to a front surface of the installing plate. The multimedia equipment of the invention has the beneficial effects that: the multimedia equipment is structurally provided with the rotating device which is connected with the installing shaft, a controller starts a starting motor through a junction box to drive a screw to rotate, so that a cooperating gear engaged with the screw can rotate, while a half gear rotates with the cooperating gear, and a moving frame which is engaged with the half gear can move back and forth, thus a rotation gear can rotate around a fixed rotating shaft under the driving ofthe moving frame, therefore, angle of the main body can be adjusted quickly and accurately.

The invention discloses a shaping device with a cleaning function for metal pipe casting part production. The shaping device comprises a machining table and a shaping head, the machining table is connected with a driving mechanism used for driving the shaping head to rotate, the shaping head comprises at least two chamfering cutters, a sliding sleeve, a fixing rod and a connecting rod, the sliding sleeve is connected with a locking mechanism used for locking and limiting the sliding sleeve, the driving mechanism comprises a rotating main shaft, the rotating main shaft is connected with a transmission mechanism, the transmission mechanism is used for driving a brush handle to do circular motion around a rotating base, and the machining table is connected with a pipeline clamping mechanism used for being matched with the shaping head. According to the shaping device, the sliding sleeve can be pushed to slide on the fixing rod, the included angle between the chamfering cutters and the horizontal plane is controllable, the driving mechanism drives the shaping head to rotate, a chamfer of the end face of a pipeline can be shaped, and the chamfering angle is conveniently controlled and adjusted by people; and meanwhile, waste residues generated during pipeline chamfering are swept into a waste collecting box through bristles, so that the cleanliness of the machining table is improved.

The invention belongs to the field of radiotherapy equipment, and particularly discloses a proton radiotherapy chair for realizing sitting posture radiotherapy in a fixed beam therapy room, which comprises a head fixing part, an inclined moving part, a height adjusting part, a seat part, a lifting moving part and a two-dimensional translation moving part which are sequentially connected from top to bottom, wherein the head fixing part is used for fixing the head of a patient, the inclined moving part is used for driving the head fixing part to incline front and back and left and right, and the height adjusting part is used for adjusting the relative height of the head fixing part and the seat part; and the lifting moving part and the two-dimensional translation moving part are respectively used for driving the seat part to move in the vertical direction and the horizontal plane. According to the invention, six-degree-of-freedom movement of the treatment chair and adjustment of the height and angle of the head of a patient can be realized, and the requirements of sitting radiotherapy in a fixed beam treatment room are met.

The invention relates to the technical field of medical equipment, and particularly relates to an endoscope fixing supporting device for the gastroenterology department. The endoscope fixing supporting device for the gastroenterology department comprises a C-shaped fixing plate, risers, limiting sliding blocks, toothed plates, a top plate, a stepping motor, an L-shaped supporting plate and an endoscope fixing plate; a driven gear and a driving gear are respectively arranged at the upper parts of the risers positioned at the left and right sides; the tops of both the risers are in sliding connection with the limiting sliding blocks of which the front ends are of a tooth shape; the toothed plates are arranged at the middle parts of two risers; the toothed plates are meshed with the driving gear and the driven gear. According to the invention, by mutual meshing among the toothed plates, the driven gear and the driving gear, regulation on a height of the endoscope fixing plate is implemented, and stability is relatively high; by rotation of the stepping motor, a gear a is driven to rotate so as to drive a rotating rod and the endoscope fixing plate at the top of the rotating rod to rotate, thereby implementing regulation on an angle of the endoscope fixing plate; use of the stepping motor makes angle regulation more accurate, and in the operating process, a user does not need to carry out manual operation, so that the endoscope fixing supporting device for the gastroenterology department is very convenient and labor-saving.

The invention discloses a light following type high-efficiency photovoltaic power generation device and a use method thereof. The light following type high-efficiency photovoltaic power generation device comprises a bottom plate, a light following mechanism and a protection mechanism, a rotating disc is rotationally connected into a rotating groove in the middle of the upper surface of the bottom plate through a bearing, a storage battery is arranged in a mounting groove in the lower end in the bottom plate, and supporting blocks are arranged at the four corners of the lower surface of the bottom plate; the light following mechanism is arranged on the upper surface of the rotating disc, the upper end of the light following mechanism is fixedly connected with the lower surface of the mounting frame plate, a solar power generation panel is arranged in the mounting frame plate, and a sealing film is arranged on the upper surface of the mounting frame plate; the protection mechanism is arranged between the lower surface of the mounting frame plate and the upper surface of the bottom plate; according to the light following type high-efficiency photovoltaic power generation device, multiple angles of the photovoltaic power generation panel can be adjusted, angle adjustment is more accurate, high-efficiency power generation is achieved, influences of external dust and water vapor on electric appliances are avoided, and dismounting and mounting of protection components are facilitated.

The invention discloses an embryo transplantation machine which comprises a transplantation tube body, a liquid injection tube, a washing liquor tube and a camera. The liquid injection tube and the washing liquor tube are arranged in the transplantation tube body, the camera is arranged at the end of the transplantation tube body, an angle adjusting assembly is arranged at the end of the liquid injection tube, an embryo injection head is arranged on the angle adjusting assembly, and an adjusting wire for operating the angle adjusting assembly to adjust the angle adjusting assembly so as to adjust the embryo injection head is arranged on the transplantation tube body and penetrates through the transplantation tube body to be in threaded connection with a nut. By arranging the angle adjusting assembly, the adjusting wire is adjusted only through the nut when the machine is used, and angle adjustment of the embryo injection head can be achieved. In addition, an adjusting ball is in linkage with an outer rotating ball, flexible and accurate angle adjustment of the embryo injection head can be achieved, and the embryo transplantation success rate can be greatly improved by adopting the machine.

The invention discloses a quantitative cutting device for aluminum sectional materials, and belongs to the field of machining equipment. A side wall is arranged on a base, an upper supporting plate is arranged on the side wall, a sliding ring plate is arranged on the upper supporting plate in a slidable mode, positioning plates are connected to the sliding ring plate, each positioning plate is provided with a pointer, the upper supporting plate is provided with angle scales, each positioning plate is provided with linear scales, a cutting device is connected to the base, and the upper supporting plate is provided with an avoiding groove. A rotary knob is connected to the upper supporting plate, a locking block is in threaded connection with the rotary knob, the tooth number of a first gear is z1, the tooth number of a second gear is z2, the sliding ring plate is provided with a third gear, the tooth number of the third gear is z3, the cutting device is provided with a fourth gear, the tooth number of the fourth gear is z4, and z1: z3 = z2: z4. The rotary knob is adjusted, the first gear drives the sliding ring plate to rotate, the cutting device rotates reversely, adjustment is convenient, the installation requirement of equipment is lowered, and therefore the cutting angle can be conveniently adjusted, quantitative cutting is achieved through the linear scales, and fixed-angle adjustment is achieved through cooperation of the angle scales and the pointers.