180 results about "Side Tooth" patented technology

A striker driving mechanism for an electric nail gun includes a striker, a driving motor, a gearbox, a driving cam and a relay device. The striker has driving teeth on one side facing the driving cam to engage with pins thereon. A nail driving groove with a locking hole is centrally located on the top surface of the front of the striker. A triangular projection is provided on the striker bottom and in front of the locking hole. The relay device includes a mounting base hinged with one end of a striker support block whose other free end has an arc-shaped latch projection facing upward and connecting a reset spring being pre-compressed to maintain the arc-shaped latch projection always held against the bottom of the striker. The striker having single side tooth structure and a passive catch device simplifies the structure and improves the operational stability.

The utility model relates to the field of machining tools, and discloses a machining tool for an external spline with side teeth, which comprises an external spline hobbing cutter and an external spline side tooth milling cutter, a plurality of groups of hobbing cutter teeth are arranged on the external spline hobbing cutter along the axial direction, a root digging structure is arranged at the tooth top of each hobbing cutter tooth, and a chamfer is arranged at the tooth root of each hobbing cutter tooth; the external spline side tooth milling cutter comprises a milling cutter rod, a milling cutter blade is installed at the end of the milling cutter rod, an involute-shaped cutting edge is arranged on the milling cutter blade, and a plurality of involute cutting edge teeth are arranged on the cutting edge side by side. The external spline driving shaft capable of machining the spline with the side teeth solves the problem that in the prior art, a cutter capable of machining the external spline of the spline driving shaft in the design does not exist, and the machining requirement of the external spline with the side teeth cannot be met.

According to the novel rope winding and unwinding device, in the state that a rope is tightened, the seat clamping jaw can move towards the shaft side teeth under the driving of the abutting driving part of the rotary cover, the elastic jaw arm keeps the matching of the jaw teeth and the shaft side teeth through elasticity, the winding shaft main body is driven to tighten and wind the rope, the shaft side teeth abut against the jaw teeth outwards in the process, and the rope is wound. The elastic claw arms of the seat clamping claws generate outward elastic deformation by means of elasticity, the shaft side teeth slide through the claw teeth along the corresponding tooth slopes on the claw teeth, and the claw teeth fluctuate in the direction close to or away from the shaft side teeth in the continuous rotating process. The claw teeth clamp the shaft side teeth by virtue of corresponding claw clamping surfaces on the claw teeth and position the winding shaft main body; when the rope object is released, the abutting driving part does not apply pressure to the seat clamping jaw, the jaw teeth are driven by deformation recovery of the elastic jaw arms to move outwards to be separated from the shaft side teeth, and the jaw teeth do not clamp the shaft side teeth. The shaft side teeth replace a traditional cover tooth structure. Relative rotation and clamping of the winding shaft and the cover body are achieved through the second axial limiting part and the third axial limiting part.

According to the novel rope winding and unwinding device, when the rope is tightened, the seat clamping jaw can move towards the shaft side teeth under the driving of the abutting driving part of the rotary cover, the elastic jaw arm keeps the matching of the jaw teeth and the shaft side teeth through the elasticity, the winding shaft main body is driven to tighten and wind the rope, the shaft side teeth abut against the jaw teeth outwards in the process, and the rope is wound. The elastic claw arms of the seat clamping claws generate outward elastic deformation by means of elasticity, the shaft side teeth slide through the claw teeth along the corresponding tooth slopes on the claw teeth, and the claw teeth fluctuate in the direction close to or away from the shaft side teeth in the continuous rotating process. The claw teeth clamp the shaft side teeth by virtue of corresponding claw clamping surfaces on the claw teeth and position the winding shaft main body; when the rope object is released, the abutting driving part does not apply pressure to the seat clamping jaw, the jaw teeth are driven by deformation recovery of the elastic jaw arms to move outwards to be separated from the shaft side teeth, and the jaw teeth do not clamp the shaft side teeth. The shaft side teeth replace a traditional cover tooth structure. Relative rotation and clamping of the winding shaft and the cover body are achieved through the second axial limiting part and the third axial limiting part.

The invention relates to the technical field of perioral muscle function detection, and discloses a flexible sensing function integrated tongue muscle function detection system and method.The system comprises a tooth socket type flexible film sensor, a wireless transmission module and a control module; the tooth socket type flexible film sensor is of a wearable tooth socket structure, a sensing array formed by a plurality of sensing units is arranged in the tooth socket type flexible film sensor, and the sensing array is distributed in an upper jaw area and a side tooth area corresponding to tongue muscle movement; the wireless transmission module is arranged on the outer side area of the upper molar and is connected with the tooth socket type flexible film sensor through the flexible printing circuit; the control module is connected with the wireless transmission module and comprises a calibration module, an initial value determination module, a correction module and a data storage and communication module. According to the invention, accurate, non-invasive and real-time monitoring of tongue muscle activity is realized.

The invention relates to a device for gear milling of a gear (17) with a first hob (1) and a second hob (3), wherein in a first process step the first hob (1) mills a top-side tooth flank profile into the gear (17), and in a second process step the second hob (3) mills a bottom-side tooth flank profile into the gear (17). According to the invention, in the second process step the second hob (3) is out of chip engagement with the top-side tooth flanks (19) formed in the first process step.

The utility model relates to the technical field of encoders, and discloses an encoder with steel ball positioning, which comprises a signal device, the inner bottom wall of the signal device is rotatably connected with a side tooth positioning wave disc, the left side of the top wall of the signal device is provided with a square groove, and the left side of the interior of the signal device is fixedly provided with an elastic sheet. A steel ball is fixedly installed on the left side of the inner bottom wall of the signal equipment, the steel ball is clamped with the side face tooth positioning wave disc, a shaft core is fixedly connected to the interior of the side face tooth positioning wave disc, a shaft sleeve is fixedly installed on the top wall of the signal equipment, and a fixing support is fixedly connected to the bottom wall of the signal equipment. According to the utility model, when the side tooth positioning wave disc is driven, the steel ball is extruded so as to push the elastic sheet, the steel ball makes a clear positioning sound, the elastic sheet is pulled, so that the elastic sheet made of materials with different thicknesses is replaced, the rotation torsion is further changed, and the rotation service life of the encoder is greatly prolonged.

The invention discloses a precise clamping type multi-station embryo culture dish operation table and a use method thereof, and relates to the technical field of embryos. A guide groove is formed in the inner side of a guide frame, a plurality of alignment flat grooves are formed in the top side face of the guide frame, and a plurality of spiral fasteners aligned with the alignment flat grooves are installed on the side face of the guide frame in a screwed mode. The clamping tooth piece comprises a toothed plate, two vertical plates fixed to the upper side of the side end of the toothed plate and a transverse rod fixed between the upper side ends of the two vertical plates, and a sliding piece installed at the guide groove in a sliding mode is further fixed to the side end of the toothed plate. The embryo culture dish comprises a lower ring body and an upper ring body, and a ring gap is formed between the periphery of the lower ring body and the upper part of the upper ring body. The gear ring piece comprises a ring plate which is positioned and sleeved at the position of the ring position notch; and an outer ring tooth opening matched with the side tooth opening is formed in the outer ring side of the ring plate. The culture dish is effectively prevented from being mistakenly touched and shaken, the problem that normal development of cells is affected by a high-intensity magnetic field and the like is also avoided, and a stable external environment is provided for embryonic cell culture.

The utility model relates to a novel stainless steel pipe connecting structure, and aims to solve the problems of complicated installation, insufficient sealing performance, high cost and the like in the conventional connecting mode. The structure comprises an open annular shell, and two ends of the open annular shell are folded inwards to form a groove-shaped structure; one end of each extension plate is perpendicular to the side wall of the shell, and the other end of each extension plate is bent and attached to form an enclosed cavity and is provided with a mounting groove; the arc-shaped gasket is located in the cavity, two ends abut against the extension plates, and mounting holes are formed; the C-shaped lining plate is attached to the inner wall of the groove-shaped structure of the shell and is internally provided with a One side of the annular clamping strip is in contact with the inner wall, and the other side of the annular clamping strip is of a tooth-shaped structure to form a guide inclined surface; and the screw rod penetrates through the mounting hole and is connected with the nut to realize stainless steel pipe connection. The structure simplifies installation, improves sealing performance, reduces cost and is suitable for various stainless steel pipe connection scenes.

The utility model relates to a steering gear box support mechanism, which belongs to the technical field of steering gear box supports and comprises a frame left longitudinal beam body, a first U-shaped frame and a mounting plate, an adjusting mechanism is arranged on the bottom wall of an inner cavity of the first U-shaped frame, heat dissipation mechanisms are arranged on the left side and the right side of the bottom wall of the inner cavity of the first U-shaped frame, and a supporting frame is arranged on the lower surface of the first U-shaped frame. The supporting frame is fixed to the right side of the vehicle frame left longitudinal beam body through bolts, and the mounting plate is slidably connected to the outer side of the second U-shaped frame. According to the steering gear box support mechanism, a steering gear box can be effectively fixed to the mounting plate, limiting and fixing are conducted by finely adjusting the mounting position and using fixing bolts, the accuracy and stability of the mounting position of the steering gear box are ensured, and the steering problem caused by improper mounting is reduced; the stability of the whole mounting structure is improved, and the reliability and safety of the steering gear box in the working process are ensured.

The invention relates to the technical field of tooth desensitization, in particular to a tooth protection sleeve assembly and a tooth desensitization device.The tooth protection sleeve assembly comprises a groove face treatment protection sleeve and a side face treatment protection sleeve, and two first limiting parts of the groove face treatment protection sleeve are arranged at one end, in the first direction, of a first main body part; the to-be-treated tooth of the groove surface is positioned between the two first limiting parts. An accommodating cavity is formed in the first main body part in a penetrating manner and is used for accommodating a light guide piece; a first opening of the accommodating cavity is positioned between the two first limiting parts and is formed towards a tooth socket of a to-be-treated tooth on the socket surface; the two first positioning parts of the side treatment protective sleeve are arranged at one end of the second main body part along the third direction, and the side to-be-treated tooth is positioned between the two first positioning parts. A containing cavity is formed in one first positioning part in a penetrating mode and used for containing the light guide part, and a second opening of the containing cavity faces the side face of the to-be-treated tooth. The tooth desensitization device comprises a light guide part and the tooth protection sleeve assembly, wherein the light guide part can be inserted into the accommodating cavity or the accommodating cavity.

The utility model discloses an automatic feeding heat treatment device for stainless steel bars, which comprises an outer frame, a top plate mounted at the top of the outer frame, a heat treatment device arranged at the position of an inner frame of the outer frame, and a sliding plate connected to the bottom of the top plate in a sliding manner, a fixed plate is fixedly mounted at the bottom of the sliding plate, and a transmission cavity is formed in the fixed plate; the middle of the fixing plate is slidably connected with a side tooth column, the two sides of the side tooth column are meshed with first gears, the first gears are meshed with second gears, the middle of each second gear is connected with a transmission chain, and the other side of each transmission chain is connected with a chain wheel. The rotating direction of the first gear is controlled through lifting of the side tooth column, the clamping plates on the two sides can drive the arc-shaped plates to clamp a stainless steel rod through gear transmission, and therefore in use, the stainless steel rod only needs to abut against the circular plate upwards, the side tooth column is made to ascend, the arc-shaped plates on the two sides are driven to clamp the stainless steel rod, and the stainless steel rod can be clamped. The method is fast, efficient, free of size limitation and extremely high in applicability.

The invention relates to the technical field of automobile connecting wire harnesses, and discloses an aluminum wire harness structure for a new energy charging seat and a processing method thereof.The aluminum wire harness structure comprises an aluminum wire core and a copper terminal, the aluminum wire core comprises a core main body part and a core connecting part, and the copper terminal comprises an end main body part and an end connecting part; the core connecting part and the end connecting part are respectively formed by stamping of a wire core press molding machine and a terminal press molding machine, the surface of the core main body part is sleeved with an insulating sleeve, and two corresponding side surfaces of the core connecting part are integrally connected with side tooth blocks; according to the aluminum wire harness structure, tight interference fit between the aluminum wire core and the copper terminal is achieved through clamping fit between the side tooth blocks and the side tooth grooves in combination with a temperature difference assembly process and by means of the thermal expansion and cold contraction characteristic of metal, secondary fixing of the insertion blocks and the insertion barrels is assisted, a dual mechanical locking structure is formed, and the problems of loosening and falling of the connecting parts are effectively avoided.

The invention discloses a composite worm grinding wheel and a dressing method thereof.The composite worm grinding wheel is composed of a surface micro-structured grinding wheel body and a fine grinding wheel body which are axially connected into a whole, the surface micro-structured grinding wheel body adopts ultrasonic vibration to assist a single-point diamond pen in dressing, and a large number of separated-continuous oblique curve micro grooves are dressed in the tooth side face; cutting force, heat production and the temperature of a contact area are reduced by reducing the contact layer, the effective blade grinding number of the grinding wheel during grinding is increased, and the problems of blockage of the grinding wheel and thermal damage to the surface of a workpiece are effectively solved; a fine grinding working face is formed on the outer side tooth face of the fine grinding wheel, and the problem that the surface roughness is large is solved by using grinding materials with the large particle size number. The device integrates the functions of rough grinding and accurate grinding, machining is completed through one-time clamping, repeated clamping and positioning errors are reduced, materials are efficiently removed, chip removal and heat dissipation are improved, the machining precision and size consistency are improved, and the contradiction that efficiency, heat dissipation and surface quality are difficult to consider in the generating grinding process is solved.

The utility model belongs to the technical field of liquid crystal module processing, and particularly discloses dispensing equipment with an anti-displacement structure, which comprises a dispensing table, the top of the dispensing table is fixedly connected with a limiting box, and the bottom of the dispensing table is fixedly connected with a servo motor. The output end of the servo motor penetrates through the inner surface of the dispensing table and extends into an inner cavity of the limiting box. According to the dispensing equipment with the displacement prevention structure, a servo motor is arranged, so that a gear can be driven to rotate, the gear drives toothed plates on the two sides to move towards the inner side under the action of tooth meshing in the rotating process, a vertical plate can be driven to move towards the inner side through transmission of a connecting rod, and a liquid crystal module is limited left and right; the displacement in the use process is avoided; the screw rod moves downwards under the action of threads in the rotating process and drives the limiting plate to move downwards, the liquid crystal module can be limited up and down through cooperation between the limiting plate and the supporting plate, and the displacement prevention effect on the liquid crystal module is improved.

The invention relates to a structural design method of an eccentric cradle body of a cradle rotary table for a five-axis machine tool, which is characterized in that the eccentric direction is opposite to the rotating direction through the eccentric design of the cradle body structure, so that the tooth surface on one side of a worm gear is tightly attached to the tooth surface on one side of a worm; therefore, the problem of unstable precision of the rotary table inclined shaft caused by a worm and gear gap is solved. The invention relates to a method for identifying structural parameters of an eccentric cradle body by mainly combining simulation analysis and a multi-objective optimization algorithm. The method comprises the following steps: firstly, constructing a multi-body dynamic model in Adams, obtaining a transmission error and jitter curve through torque scanning, and identifying an optimal input torque interval; and finally, importing the optimized box body model into Adams for coupling simulation verification, and calibrating the simulation model in combination with a laser interference experiment. The method is suitable for various high-precision machine tools, in particular to the field of five-axis machine tool machining requiring high precision and high dynamic performance.

The utility model discloses an etching bearing basket which comprises a basket body and two side plates, a containing cavity with an opening in the top is formed in the basket body, side through openings are formed in the two opposite sides of the containing cavity respectively, and a bottom tooth structure used for containing a glass substrate is arranged at the bottom of the containing cavity; the two side plates are arranged at side through openings in the two sides of the basket body respectively, the bottom ends of the two side plates are rotationally connected with the basket body, the top ends of the two side plates are connected with the basket body in a clamped mode through clamping structures, and side tooth structures used for being connected with the side edges of a glass substrate are arranged on the inner sides of the side plates. The device can prevent the side edge of the glass substrate from being abraded and scratched, and meanwhile, the side tooth structure can limit and fix the glass substrate in the etching process of the glass substrate, so that the product quality is effectively ensured.

The utility model provides a conveying belt frame fixing block machining fixing tool and belongs to the technical field of machining. Comprising a workbench, a fixing assembly and a machining assembly, wherein the workbench is provided with an inner cavity; the fixing assembly comprises a gear rotationally connected with the inner cavity. The connecting block is pushed to move through the air cylinder, then the toothed plate is driven to move transversely, the gear is driven to rotate through movement of the toothed plate, the toothed plate on the other side of the gear is driven to move oppositely while the gear rotates, and finally the two clamping plates are driven to move oppositely through opposite movement of the two toothed plates. At the moment, the fixing block is placed between the two clamping plates, the two clamping plates move towards the center position to fix the fixing block, the fixing firmness and stability of the fixing block can be improved, meanwhile, the fixing blocks of different sizes can be stably fixed, and the application range of the device is widened.

The utility model discloses an alarm device of a power prediction monitor for a new energy power station, which relates to the technical field of alarm devices and comprises a mounting rack, one side of the mounting rack is rotatably connected with a bottom plate for fixing equipment, the upper surface of the mounting rack is provided with an alarm body, and the side surface of the mounting rack is provided with a rotating mechanism. The rotating mechanism comprises a double-side tooth cylinder, the center of the double-side tooth cylinder is sleeved with a limiting rod, single-side tooth cylinders are fixedly installed on the two sides of the limiting rod, clamping teeth matched with each other are arranged on the inner sides of the single-side tooth cylinders and the surfaces of the two sides of the double-side tooth cylinder, and a limiting rotary knob used for limiting the single-side tooth cylinders is arranged on the surface of one side of the limiting rod. And a mounting mechanism is arranged on the upper surface of the mounting frame, and in the scheme, by arranging the rotating mechanism, the mounting position of the equipment can be adjusted according to use requirements, and the effect of meeting different mounting requirements is achieved.

The utility model provides a side tooth blowing mechanism and a side tooth blowing device for a diffusion quartz section process. The side tooth blowing mechanism comprises side teeth, a side tooth blowing mechanism and a side tooth blowing mechanism, the first through hole is formed in the side tooth and transversely penetrates through the base of the side tooth; the second through holes are formed among the side teeth; and the first through hole and the second through hole are communicated with each other. The two ends of the first through hole are purged, so that fragment residues in the manufacturing process of the side tooth mold are blown out through the second through hole, and the later product quality is improved.

The utility model discloses a fastener screening device, and belongs to the technical field of screening. The device mainly comprises a base, a supporting table is fixed to the upper side of the base, a toothed plate is arranged on the upper side of the supporting table, movable tables are arranged on the two sides of the supporting table, a plurality of teeth are arranged on the upper sides of the movable tables, one sides of the teeth extend to the upper side of the supporting table, a rotating shaft is rotationally arranged in the supporting table, and the two ends of the rotating shaft penetrate through the movable tables correspondingly. The two ends of the rotating shaft are in threaded connection with the movable tables correspondingly, and the thread directions of the two ends of the rotating shaft are opposite. By rotating the rotating shaft, the two movable tables are close to or away from the supporting table at the same time, on one hand, the device can adapt to nuts of different sizes by adjusting the distance between the teeth on the two sides, and on the other hand, the toothed plate can be kept between the teeth on the two sides so that the toothed plate can lift the middle position of a bolt, and the situation that the bolt slides down is reduced. The fastener screening equipment achieves the effect of having an adjusting function.

The invention provides a rapier loom with an ironing function, and relates to the technical field of rapier looms, the rapier loom comprises a loom mechanism, an ironing mechanism is mounted on the loom mechanism, a supporting plate mechanism is further mounted on the loom mechanism, and the ironing mechanism is located above the supporting plate mechanism; the weaving machine mechanism comprises two side supports, mounting boxes are fixedly connected to the upper surfaces of the two side supports, and two conveying rollers are rotatably mounted on one side between the two side supports. Through the technical scheme, the purpose is that a driving motor is started to drive a driving lead screw to rotate, and the driving lead screw rotates to drive a connecting plate and a side toothed plate to move horizontally; when the side toothed plate makes contact with the driven gear, the driven gear and the rotating shaft can be driven to rotate, then the rotating shaft drives the L-shaped connecting piece to rotate with the rotating shaft as the center, the ironing plate can be driven to move to the position above the knitted fabric, the blanked knitted fabric is ironed, then the processing efficiency is improved, and manual labor is saved.

The invention relates to the technical field of electronic products, and particularly discloses a router which comprises a base, a circuit board, a first shell and a driving assembly, the base is provided with an air inlet and an avoiding opening, and the air inlet is formed in the bottom of the base; the circuit board is arranged on the base, a first light-emitting part and a plug connector are arranged on the circuit board, and at least part of the plug connector is located in the avoiding opening; the first shell is rotationally arranged on the base and covers the peripheries of the circuit board and the first light-emitting part, and the first shell is provided with an air hole; the driving assembly comprises a servo motor, a driving wheel and a gear ring, the servo motor is arranged on the base, the driving wheel is connected with the servo motor, the gear ring is arranged on the first shell, and the inner side tooth part of the gear ring is meshed with the driving wheel. According to the arrangement, the visual attraction and the heat dissipation effect are improved.

The utility model provides a large plate forward polishing turnover tool which comprises a soaking tank body, and universal trundles are correspondingly installed on the periphery of the bottom of the soaking tank body. Placing frames capable of being transversely adjusted and limited are correspondingly arranged on the left side and the right side in the soaking tank body, a plurality of side teeth evenly distributed at intervals are correspondingly arranged on the inner side faces of the opposite sides of the two placing frames, and a heating assembly capable of being pulled out in a sliding mode is correspondingly arranged on the inner side of the bottom of the soaking tank body. According to the utility model, a plurality of products can be transferred at one time, the overall structural design is simple and ingenious, the production efficiency is effectively improved, the manpower is reduced, the potential safety hazard is reduced, the damage risk is reduced, and the practicability is strong.

The utility model relates to an anti-loosening ultra-precision screw for an aviation aircraft, which comprises a bolt and a nut, the bolt is mounted on an aircraft part, a retaining washer is sleeved on a screw rod, inner side teeth on the inner wall of the retaining washer are positioned in a limiting groove on the surface of the screw rod to slide when the retaining washer is mounted, and the retaining washer is fixed on the screw rod after the retaining washer is mounted. After the first nut is installed and fastened, the clamping block on the outer surface of the retaining washer is bent, and the clamping block is bent into the clamping groove, so that the anti-loosening protection effect is achieved, meanwhile, the second nut is installed on the screw rod, and due to the fact that the upper wedge-shaped ring is integrally machined at the bottom of the first nut and the lower wedge-shaped ring is integrally machined at the top of the second nut, the anti-loosening effect is achieved. The upper wedge-shaped ring and the lower wedge-shaped ring are integrally machined, the wedge-shaped tooth parts used in cooperation are integrally machined on the adjacent sides of the lower wedge-shaped ring and the upper wedge-shaped ring, and when the second nut is tightened, due to the arrangement of the upper wedge-shaped ring and the lower wedge-shaped ring, the wedge-shaped tooth parts on the adjacent sides of the upper wedge-shaped ring and the lower wedge-shaped ring are meshed and locked, and looseness caused by vibration of the screw rod is effectively prevented.

The present invention relates to the technical field of buckets, and in particular to an excavation bucket for construction and a method thereof, comprising a bucket mechanism, comprising a shovel body, the bottom of the front side of the shovel body being fixedly connected with shovel teeth, the bottoms on both sides of the front side of the shovel body being fixedly connected with side teeth, and the top of the shovel body being fixedly connected with ear plates; a dust removal mechanism, comprising a transfer box, two of which are provided, the inner sides of the transfer boxes being fixedly connected with the tops on both sides of the shovel body, the transfer boxes being connected with an external water pump, the outer side of the top of the transfer box being connected with a water outlet pipe, the bottom inside the water outlet pipe being fixedly connected with a three-hole plate, the top of the three-hole plate being movably connected with a two-hole plate, the bucket mechanism is controlled by using an excavator to excavate and shovel out the soil, the dust removal mechanism is activated during excavation to spray water mist for dust removal, and the descaling mechanism can be used to remove dust from water in hard water areas.

Drive (10) for a sash of a door or window, comprising a housing (12), a piston (16) slidably guided in the housing (12) and acted upon by a spring unit (14), and an output shaft (20) rotatably mounted in the housing (12) and connected to the piston (16) via a rack and pinion drive (18), wherein the rack and pinion drive (18) comprises a non-circular pinion (22) connected to the output shaft (20), the teeth (24) of which mesh with a piston-side mating tooth (26), and wherein the effective lever arm length (R) of the pinion-side tooth (24) increases with increasing sash opening angle in an initial sash opening angle range of 0° up to a first predetermined sash opening angle, starting from a relatively higher or maximum effective lever arm length (R0) at the sash opening angle of 0°. decreases, characterized by this,that the effective lever arm length (R) of the pinion-side toothing (24) increases abruptly with increasing wing opening angle from a second predetermined wing opening angle, which is greater than or equal to the first predetermined wing opening angle and less than the maximum wing opening angle, wherein, to generate the abruptly increasing effective lever arm length (R) of the pinion-side toothing (24) or the associated pitch curve jump (48), at least one meshing tooth pair (28, 30) of the pinion-side and piston-side toothing (24, 26) is provided with pressure-side tooth flanks (28', 30') that are extended compared to the pressure-side tooth flanks of the remaining tooth pairs.

The present invention relates to a foldable curtain, comprising a curtain body and a hanging rod for hanging the curtain body. The hanging rods include a left hanging rod and a right hanging rod, each of which is fixed with a motor. A first gear is fixed to the left hanging rod, and a second gear is rotatably provided on the right hanging rod, with the first gear and the second gear meshing with each other. The side wall of the second gear is provided with side teeth, which mesh with a bevel gear, which is fixed to the rotating shaft of the motor. The first gear and the second gear are relatively fixed by a fixing member. By providing a foldable hanging rod, the curtain body can be folded to one side of the window with the hanging rod, thereby reducing space occupation and avoiding shading and affecting the appearance.

The present invention relates to a structure of a trolley drill bit, which includes a drill body and a wing body. Liquid discharge holes communicating with the installation holes are formed on the drill body between the top teeth, and slag discharge grooves are formed on the drill body between the top teeth. The slag discharge grooves extend along the radial direction of the drill body. One end of the liquid discharge hole far from the installation hole is located in the slag discharge groove. Main slag discharge grooves are circumferentially spaced on the wing body and extend along the circumferential direction of the drill body. One end of the main slag discharge groove is communicated with the slag discharge groove; auxiliary slag discharge grooves are formed on the wing body between the side teeth, and the auxiliary slag discharge grooves are arranged in parallel with the main slag discharge grooves; a drainage groove with one end communicated with the slag discharge groove is formed on the drill body, and the drainage groove extends towards the auxiliary slag discharge groove. The present invention has the effect that the central groove, the slag discharge groove and the drainage groove on the drill body further improve the discharge efficiency of rock powder during rotation, thereby improving the operation efficiency of rock drilling.