3264results about How to "Reduce wear" patented technology

The application provides a double-station worktable for CNC, and particularly relates to the technical field of CNC machine tool auxiliary equipment, and comprises a CNC main body, an inner platform and a tool head unit, and further comprises a double-shaft switching mechanism arranged between the outer side of the CNC main body and the inner platform, wherein the double-station worktable for CNC; the double-shaft switching mechanism composed of an X-axis displacement component, a Y-axis displacement component and a sinking fastening component is arranged, so as to solve the defects of the existing technology, such as the jamming misplacement caused by the single guide rail alignment of the multi-station switching, the lack of special connection structure, the non-separation of the carrier and the guide rail during the processing, the vibration transmission affecting the precision, and the like, to realize the cooperative action of the X-direction bearing movement of the jig table, the Y-direction smooth connection and the locking of the processing position sinking, and the double-station switching does not need complex debugging, so that the equipment downtime is greatly reduced, and the processing precision and stability are ensured.

This invention discloses a power cord anti-pull mechanism and an industrial six-axis robot, belonging to the field of industrial robot technology. The power cord anti-pull mechanism is applied to equipment requiring electrical power for operation. It includes a power cord, a power supply box, and an anti-pull device. One end of the power cord is equipped with a power plug, and the other end is used to connect to the equipment requiring electrical power. A power socket is provided on one side of the power supply box, into which the power plug can be inserted to connect to the power supply. The anti-pull device is disposed on the power supply box and includes a fastening device and a power device. The fastening device is used to secure the power plug after it is inserted into the power socket, preventing pulling between the power cord and the power socket. The power device provides power to the fastening device to secure the power plug. The power cord anti-pull mechanism can prevent problems such as poor contact or disconnection between the power cord and the power supply box during the operation of the industrial six-axis robot.

The utility model relates to the technical field of casting, in particular to a vacuum negative pressure device for lost foam casting. According to the technical scheme, the device comprises a mounting bottom plate, a vacuum pump is arranged above the mounting bottom plate, a pressure stabilizing assembly is arranged at the position, located on the mounting bottom plate, of the air inlet end of the vacuum pump, a filtering assembly is arranged on one side of the pressure stabilizing assembly, a negative pressure pipe is arranged on a connecting pipe, and a vacuum distribution mechanism is arranged at the end, away from the connecting pipe, of the negative pressure pipe. The filtering assembly adopts a multi-layer composite filtering structure, so that impurities in gas can be efficiently removed, meanwhile, the system pressure can be monitored and adjusted in real time through an intelligent central controller in the pressure stabilizing assembly, pressure fluctuation is effectively buffered, a stable negative pressure environment is provided for lost foam casting, and the production efficiency is improved. And meanwhile, the vacuum distribution mechanism is designed in a modularized mode, negative pressure distribution can be accurately controlled according to different production requirements, the air exhaust efficiency is improved, and the production efficiency of lost foam casting and the precision of castings can be improved.

This utility model discloses a container, comprising a frame, a top panel, side panels, end panels, and door panels. At least one of the top panel, side panels, end panels, and door panels includes at least two layers: a steel plate and a composite material plate. The steel plate is fixedly connected to the frame. The composite material plate is located on at least one side of the steel plate facing inwards and outwards, and is fixedly connected to the steel plate. The composite material plate has the same shape as the steel plate to be integrally fitted with it, or the composite material plate is flat and partially fitted with the steel plate. According to this utility model, at least one of the top panel, side panels, end panels, and door panels is configured as a two- or multi-layer structure, wherein the side of the steel plate facing inwards and / or the side facing outwards is a composite material plate. This design allows the container to meet long-term requirements for wear resistance, acid and alkali resistance, salt spray resistance, and mildew resistance. Furthermore, container wall maintenance is relatively simple and inexpensive.

The utility model discloses an embedded block blank lifting appliance which comprises a lifting ring, a pin shaft assembly, upper pull arms, lower clamping arms and a tong head plate and further comprises a limiting rod assembly, the length of the limiting rod assembly can be adjusted, one end of the limiting rod assembly is rotationally connected to the outer wall of one upper pull arm through a pin shaft, and the other end of the limiting rod assembly is rotationally connected to the other end of the limiting rod assembly. And a limiting pin is arranged on the outer wall of the other opposite upper pulling arm, and the other end of the limiting rod assembly can be clamped to the limiting pin, so that a jaw between the two oppositely-arranged tong head plates is opened, and the opening degree is matched with the width of the head of the steel rail inlaid block. According to the embedded block blank lifting appliance, the width of the opening jaw can be adjusted, so that the embedded block blank lifting appliance is suitable for clamping embedded blocks with different width specifications.

The utility model discloses an automatic probe mechanism component of a numerical control machine tool, which relates to the technical field of automatic detection of machine tools and comprises a machine tool ram, one end of the machine tool ram is detachably connected with an L-shaped fixing plate, the lower end of the L-shaped fixing plate is detachably connected with a marble base, and the lower end of the marble base is detachably connected with a linear module. Circular double guide rails are arranged in the linear module, a movable sliding plate is arranged between the two circular double guide rails, a probe seat is detachably connected to the lower end of the movable sliding plate, a probe is arranged on one side of the probe seat, and a headless screw used for fixing the probe is arranged at the lower end of the probe seat. According to the automatic probe mechanism component of the numerical control machine tool, the probe base is converted to the horizontal plane through the L-shaped fixing plate, and meanwhile, the stability of a probe mounting track is effectively improved under the cooperation of the marble base station; the telescopic design effectively protects the waterproofness and safety of the probe, and further improves the detection precision of the probe.

The utility model relates to a torque fixing sleeve structure for a built-in motor of an electric power-assisted bicycle. The torque fixing sleeve structure comprises a center shaft, a torque sensor, a shell, a circlip for a shaft, a torque fixing sleeve and a fixing screw, the torque sensor is sleeved on the middle shaft, and the axial movement of the torque sensor is limited by the elastic retainer ring for the shaft; the torque sensor is sleeved with the torque fixing sleeve, four right positioning grooves and two left positioning grooves are formed in the two ends of the torque fixing sleeve respectively, and the right positioning grooves and the left positioning grooves are clamped with the inner wall of the shell. The torque fixing sleeve is fixed to the shell through a fixing screw, a wiring port and a wiring channel groove are formed in the torque fixing sleeve, and a sensor wiring harness penetrates through the wiring port and is contained in the wiring channel groove. The problems of high cost, complex structure and difficult maintenance are solved.

The utility model discloses an oxygen -enriched bottom -blowing smelting furnace structure, include: base, the top surface symmetrical fixed connection of base has the support, smelting furnace main part, and the both ends of smelting furnace main part are respectively sleeved and have the closed cylinder, and the closed cylinder rotation is connected on the support, and the end plate is fixed in the closed cylinder end, and the rotating assembly is arranged between the closed cylinder and smelting furnace main part, and the closed cylinder bottom is installed with the discharge gate in rear end, and the smelting furnace main part is opened with the discharge port, transmission mechanism, and transmission mechanism includes transmission assembly and support component, cooling module, and cooling module is arranged in smelting furnace main part, and the air inlet spray head, and the air inlet spray head detachable connection is in the bottom of smelting furnace main part, and monitoring module, and monitoring module is installed in smelting furnace main part. The oxygen -enriched bottom -blowing smelting furnace can pass through the furnace body rotation and bottom -blowing oxygen -enriched and promote the reaction efficiency and the uniformity, and the utility model discloses can pass through the furnace body rotation and bottom -blowing oxygen -enriched and promote the reaction efficiency and the uniformity, and have efficient, easy maintenance, safe and stable and environmental protection adaptability.

The application discloses a plastic solid waste recycling device and belongs to the technical field of plastic recycling. A fixed mold assembly is fixedly arranged on an equipment table. A movable mold assembly is movably arranged on the equipment table. A linkage member is movably arranged on the equipment table and is provided with a linkage plug on the side facing the movable mold assembly. An outer wall of the side of the fixed mold assembly facing the movable mold assembly is provided with an insertion block. The outer wall of the side of the insertion block facing the movable mold assembly is provided with a locking cavity. The movable mold assembly is axially provided with a penetrating insertion cavity. The insertion block is slidably arranged in the insertion cavity to realize preliminary locking. The linkage plug is slidably arranged in the locking cavity to realize relocking. The multistage locking structure is matched with the integrated sealing design. After the mold is closed, the locking is firm, the melt pressure in the injection molding process is effectively resisted, the problems of loosening and deviation of the mold are avoided, the sealing performance of the butt joint surface of the mold is greatly improved, the overflow and leakage phenomena are completely eliminated, the quality of the plastic product is ensured, and defects such as flash and uneven wall thickness are reduced.

The utility model relates to air purification and filter technical field discloses a kind of high-efficiency filter with U-shaped groove sealing frame, including U-shaped frame one, the right side of U-shaped frame one is provided with U-shaped frame two, the inside of U-shaped frame one and U-shaped frame two is all provided with U-shaped groove, the inside of U-shaped frame one and U-shaped frame two is provided with mounting assembly, the inside of U-shaped frame one and U-shaped frame two is provided with mounting frame, the inside of mounting frame is provided with filter assembly. In the utility model, by the cooperation of limiting groove, limiting block, fixed bolt, mounting groove and jack, two U-shaped grooves can be sealed connection, and under the action of buffer pad and sealant, the problem of insufficient sealing effect and significant decline in filtration efficiency is solved, so that the sealing effect of mounting frame and filter material and U-shaped groove is realized, the wear during work is reduced, and the service life is increased.

The invention relates to the technical field of wire and cable processing equipment, in particular to a wire and cable copper wire drawing machine which comprises a machine table and the like, a pay-off device, a fixing plate and a pull rod are sequentially and fixedly mounted on the machine table from left to right, a wire drawing box is slidably connected to the position, close to the pull rod, of the machine table, and a fixed wire drawing module is fixedly connected to a side plate of the wire drawing box; the top end of the wire drawing box is fixedly connected with a lubricating liquid box, a hand pressure valve is installed between the wire drawing box and the lubricating liquid box, the hand pressure valve is connected with the fixed wire drawing module through a liquid pipe, and the hand pressure valve makes contact with the pull rod. Through the cooperative design of the hand pressure valve and the pull rod, automatic conveying control over lubricating liquid is achieved, in the wire drawing process, along with movement of the wire drawing box, the hand pressure valve is automatically opened, the lubricating liquid is accurately conveyed to the position where the wire drawing module is fixed, timely and effective lubrication is provided for a copper wire, and friction and abrasion between the copper wire and the wire drawing module are reduced.

The utility model relates to dust cloth bag technical field, concretely, it relates to spring dust cloth bag structure, including cloth bag and cloth bag top installation's fixing device, is equipped with connecting block in the fixed device top, connecting block is opened with recess, is equipped with helical flow guide vane in connecting block middle department, is equipped with fixed column in helical flow guide vane middle, and the cross fixed link is equipped with in fixed column top and recess corresponding position, is equipped with spring between cloth bag inner wall and outer wall, through the cooperation of shell, helical flow guide vane, cross fixed link, spring and cloth bag, the push board is driven to move inwards or outwards by the rotating lever, and the cloth bag is quickly installed and disassembled with the cloth bag bag mouth and shell top under the cooperation of shell, the push board is inwards extruded and carries out position spacing to the fixed cloth bag, the helical flow guide vane guides the airflow rotation, and the airflow is evenly distributed in the cloth bag inside, reduces the local wear and tear problem caused by airflow impact cloth bag's part.

This utility model discloses a die-casting mold for magnesium alloy computer parts. The mold aims to solve the problem that in existing magnesium alloy computer parts die-casting processes, the use of inclined guide posts to pull apart the core-pulling movable block in the lower mold easily leads to wear and reduces service life. The mold includes an upper mold and a lower mold. The upper surface of the lower mold has through grooves on all four sides, and a movable block is slidably disposed inside the through grooves. A core-pulling mold is fixedly connected to the inner side of the movable block. Die-casting cavities are formed between the four corners of the upper and lower molds and the core-pulling mold. This utility model fixes a fixed base with roller assemblies in the mounting groove on the movable block. When the upper and lower molds are closed, the inclined guide post is inserted into the inclined guide hole on the fixed base and positioned between two guide rollers. At this time, the guide rollers can rotate, and the inclined guide post is limited by the guide rollers on both sides, thereby reducing wear on the inclined guide post and improving its service life.

This invention relates to the field of humanoid robot technology and discloses a humanoid robot torso waist rotation linkage adjustment device, including a torso lower mounting plate, a central rotation axis, an intermediate connecting bracket, a left hip connecting seat, and a right hip connecting seat. The torso lower mounting plate is horizontally disposed at the bottom of the robot torso. The central rotation axis is arranged vertically and its upper end is coaxially fixedly connected to the lower surface of the torso lower mounting plate. The intermediate connecting bracket is fitted into the middle of the central rotation axis and rotatably connected to the central rotation axis. The left hip connecting seat and the right hip connecting seat are symmetrically arranged on both sides of the lower end of the intermediate connecting bracket. This invention achieves synchronous adjustment of torso waist rotation and lower limb posture through a mechanical linkage structure, which can adjust the lower limb posture in time during waist rotation, effectively counteract the center of gravity shift caused by torso rotation, and improve the robot's balance stability in dynamic motion scenarios.

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

This utility model discloses a cable protection device for power engineering, belonging to the technical field of cable protection devices. It includes a cable tray body, a square slot, and a movable support assembly. The movable support assembly provides positioning for cable placement and provides movement support for cable dragging. This utility model, by setting up a cable tray body with a square slot and a movable support assembly, with the movable support assembly installed on the cable tray body, provides support for cable movement during cable laying via guide wheels. The guide wheels rotate under the friction of the cable. Compared to the sliding friction when the cable moves directly along the surface of the cable tray base plate in the traditional method, its rolling friction coefficient is much smaller than the sliding friction coefficient. Therefore, it effectively reduces cable dragging resistance and greatly reduces wear and scratches on the cable outer sheath during laying, ensuring the long-term insulation performance and lifespan of the cable.

The application discloses a detection tool for a door frame assembly, and relates to the technical field of automobile part detection equipment, comprising a detection platform, wherein the detection platform is provided with a positioning unit which is inclined compared with the vertical direction, the detection platform and the positioning unit are an integral structure and are integrally pressure cast by cast iron, and the positioning unit is provided with a positioning groove for positioning the door frame assembly; a plurality of groups of pressing units are arranged at intervals around the end of the positioning groove, the pressing unit comprises a driving piece and a pre-pressing piece, the driving piece can drive the pre-pressing piece to rotate above the positioning groove, so that the end of the door frame assembly is pressed against the positioning groove. The detection platform and the positioning unit for positioning are formed by using an integrated pressure casting process, which can effectively avoid the deformation of the positioning unit during the detection process, reduce wear and tear, and cope with high-order detection and correction operations. The redesigned pressing unit can also automatically and synchronously clamp.

The utility model belongs to the field of agricultural instruments, and particularly relates to an agriophyllum squarrosum recycling device which comprises an agriophyllum squarrosum recycling body and a conveying supporting plate, the agriophyllum squarrosum recycling body is fixedly installed on the upper surface of the conveying supporting plate, the agriophyllum squarrosum recycling body comprises an air exhaust assembly, a cutting assembly and a storage cavity, and the air exhaust assembly is in threaded connection with the upper portion of the cutting assembly; the storage cavity is in threaded connection below the cutting assembly; the cutting assembly comprises a stepped cutting cavity and cutting blades, a supporting seat is integrally connected to the bottom of the stepped cutting cavity, a rotating shaft is fixedly connected to the center of the supporting seat, a plurality of sets of cutting blades are fixedly connected to the rotating shaft, and the cutting blades are longitudinally and fixedly installed on the rotating shaft at equal intervals; when the agriophyllum squarrosum is conveyed into the cutting assembly, the agriophyllum squarrosum can be smashed and collected into the storage cavity through cutting of the multiple sets of cutting blades, the processed agriophyllum squarrosum can serve as medicine, organic fertilizer and feed, recycling is achieved, and more economic benefits are brought.

A process for manufacturing compact coils of ultra-fine grained martensite-free steel bars, the process comprising the following phases: a) rolling a billet by means of a roughing mill (1) of the steel bar; b) performing at least one first cooling stage (2) so that the steel bar has a surface temperature higher than the martensite start temperature (Ms) and at least one first equalization stage in air; c) rolling the steel bar by means of at least one intermediate mill (3); d) performing at least one second cooling stage (4) always keeping the surface temperature higher than the martensite start temperature (Ms) and at least one second equalization stage in air; e) rolling the steel bar by means of a finishing mill (5) in the non-recrystallization temperature range, keeping the entire cross section of the steel bar in said non-recrystallization temperature range and wherein the total reduction is between 25% and 50% with respect to the cross section of the steel bar at the inlet of the finishing mill, so as to obtain an ultra-fine grained austenitic matrix; f) winding the steel bar into compact coils by means of at least one winding device (7) so that the ultra-fine grained austenitic matrix transforms into a mixture of ferrite and pearlite. After the winding operation is completed, the compact coils can be conveyed to a storage area by means of a conveying device (8), for example a walking beam, in which the coils are subjected to natural cooling or forced cooling or delayed cooling.

The utility model discloses a breaker electric operation mechanism with long service life, comprising a mounting rack, a driving motor, a transmission assembly, a support wheel, a main shaft and a planetary gear assembly, the driving motor is mounted on the mounting rack, the support wheel is rotatably arranged on the mounting rack through the main shaft, and the driving motor is connected with the main shaft through the transmission assembly. The planetary gear assembly comprises an inner gear and multiple sets of duplex planetary gears, a transmission gear is arranged on the main shaft, the inner gear is in meshed connection with the three sets of duplex planetary gears, a gear shaft is arranged on one side of the inner gear, a cover plate is arranged on one side of the mounting frame, and a shaft hole is formed in the cover plate; and the supporting ring is made of a plastic material, is arranged on the shaft hole of the cover plate, and is sleeved on the periphery of the gear shaft. The plastic part is arranged on the shaft hole of the cover plate and used for being matched with the gear shaft, the perpendicularity of the gear shaft of the inner gear is guaranteed, abrasion between the cover plate of the mounting frame and the gear shaft of the inner gear is reduced, and the service life of the circuit breaker electric operation mechanism is prolonged.

The application relates to the photovoltaic technical field, in particular to a solar printing screen structure, a fusing equipment thereof and a processing method, which comprise an electrode pattern, a main grid pattern line, a warp and a weft, the warp and the weft are woven to form a printing screen, a mesh hole is formed between two adjacent warps and two adjacent wefts, the warp is parallel to the main grid pattern line, the main grid pattern line is symmetrically arranged on the two sides of the electrode pattern, a main grid pad point is located in the electrode pattern, and the part of the warp in the coverage range of the electrode pattern is subjected to fusing treatment outside the coverage range of the electrode pattern. The application has the effects of improving the wear resistance of the printing screen and improving the conversion efficiency of the battery.

This utility model relates to the field of knee joint prosthesis technology, and more particularly to a low-wear knee joint replacement prosthesis. The technical solution describes a replacement prosthesis comprising a femoral prosthesis body, a liner body, and a tibial support. The femoral prosthesis body includes an upper femoral prosthesis plate and a lower femoral prosthesis plate, with multiple sets of magnets disposed between the upper and lower femoral prosthesis plates. The liner body includes an upper liner plate and a lower liner plate, with upper and lower liner cavities respectively formed on their adjacent sides, and magnets are disposed within these cavities. The magnetic poles of the adjacent sides of magnets are the same. This utility model optimizes the materials used in the replacement prosthesis, avoiding wear-prone metal particles and thus preventing inflammation. Utilizing the principle of magnetic repulsion, magnetically levitated micro-gap is formed between the prosthesis components, thereby minimizing prosthesis wear and extending its service life.

This utility model discloses a hydraulic pump with a capsule-type pumping mechanism, relating to the field of hydraulic pump technology. The utility model includes a housing, with a fixing plate fixedly connected to the front side of the housing via a second bolt. A capsule push-pull plate is movably connected to the rear side of the fixing plate via a guide rod. This utility model drives the capsule push-pull plate to move back and forth via a drive shaft, reciprocatingly pushing and pulling the pumping capsule. This allows liquid to be drawn into the pumping capsule from the inlet branch pipe and pumped out from the outlet branch pipe. The structure is simpler and easier to assemble and process. The ball bearings convert the sliding friction between the capsule push-pull plate and the pumping mechanism into rolling friction, reducing resistance and wear between the plates. The roller sleeves convert the sliding friction between the connecting column and the T-shaped connecting bracket into rolling friction, further reducing resistance and wear and extending the service life of the hydraulic pump.

The utility model relates to a novel closed sputum suction tube, including the pipe main body, is equipped with breathing machine interface, tracheal catheter interface, sputum suction tube spare interface and bronchofibroscope entrance on the pipe main body, sputum suction tube spare interface connects sputum suction tube subassembly, tracheal catheter interface with bronchofibroscope entrance coaxial arrangement, tracheal catheter interface with bronchofibroscope entrance is separately arranged in the axial both ends of pipe main body, is equipped with the closure cover that can open and close on bronchofibroscope entrance, breathing machine interface with sputum suction tube spare interface is along the circumferential arrangement of pipe main body and both are located between tracheal catheter interface with bronchofibroscope entrance. Adopt the technical scheme of the utility model, tracheal catheter interface with bronchofibroscope entrance is separately arranged in the axial both ends of pipe main body, and both are on the same straight line, and the wear of bronchofibroscope is small, and the operation is convenient, when needing to carry out bronchofibroscope examination, opens the closure cover and can carry out the operation, and it has the advantage that the operation is simple.

The application relates to an openable landscape bench for collecting rainwater, and belongs to the technical field of garden landscape facilities. The landscape bench comprises a circular ring type seat surface, the inside of the circular ring type seat surface is fixedly connected with a hollow main support column, the top end of the hollow main support column is fixedly connected with a central umbrella rib base, the outer periphery of the central umbrella rib base is fixedly connected with an inverted umbrella type roof, and the outer periphery edge of the inverted umbrella type roof is fixedly connected with a plurality of annular frames. The application has the beneficial effect that in the rainy season, the inverted umbrella type roof is an umbrella surface structure that is inclined to the center as a whole, rainwater can be concentrated and flowed into the central umbrella rib base under the action of gravity, and gradually flowed into a storage assembly along a water collecting pipe in the hollow main support column, so that the collection and storage functions of the landscape bench are realized. The structure has the functions of sun-shading, rain-shielding and efficient water collection, improves the practicability and maintenance convenience of the device, and greatly improves the land use efficiency and landscape coordination of public space.

The utility model relates to the field of stabilizer bar, especially transverse stabilizer bar's adjustable connecting structure of four -wheel electric vehicle. The utility model discloses stabilizer bar, axle bush and pull rod, stabilizer bar is trapezoidal, and the both ends are punched into the ear piece, axle bush is covered in the middle part of stabilizer bar, and pull rod is provided with two, and is hinged in the both ends of stabilizer bar respectively, and pull rod is installed on the frame, and axle bush is connected with hydraulic device still, and the top of hydraulic device is fixed with bolt and set up on the frame. Axle bush connects hydraulic device, and is electrically connected with automobile ECU and is equipped with electric control proportional valve, can automatically or manually adjust the lateral stabilizer bar roll stiffness according to the intention of driver or road condition. When driving fiercely or high -speed driving, ECU controls electric control proportional valve to adjust hydraulic device output pressure according to sensor group feedback, and the roll stiffness is increased, and the control stability and high -speed driving safety are enhanced.

This invention relates to an attached milling unit, the housing of which has an attachment bracket for attachment to a movable support arm of a carrier. The housing extends along a longitudinal axis (01). Furthermore, the attached milling unit includes at least one motor (02) and a transmission unit, the axis of rotation (05) of which is perpendicular to the longitudinal axis (01) of the housing. Two cross-cutting heads (06) driven to rotate by the transmission unit are attached to both sides of the longitudinal axis (01) of the housing and carry several milling cutters (07). Each cross-cutting head (06) has a driven output shaft (09) about which it rotates, wherein the two output shafts (09) of the cross-cutting head (06) are arranged at an angle to each other and each forms an acute angle with the longitudinal axis (01) of the housing on the side opposite to the attachment bracket. Each output shaft (09) is attached with a driven gear (10) having helical teeth, wherein each helical tooth directly meshes with the corresponding spur tooth segment of the drive spur gear (04).