21 results about "Sharp tooth" patented technology

The utility model discloses a sharp-tooth step type drill bit which comprises a drill bit base body and a drill bit crown arranged at the top of the drill bit base body. A plurality of groups of blades are arranged on the drill crown at intervals, three groups of cutting teeth are arranged on each group of blades, the three groups of cutting teeth are arranged in a stepped manner from top to bottom, the widths of the cutting teeth are gradually increased from top to bottom, a water outlet is formed in the outer wall of the drill crown between adjacent blades, and an inner water tank is formed in the inner wall of the drill crown between adjacent blades. And the inner water tank is connected with the water outlet. The drill bit has the advantages that the drill bit effectively cuts into rocks to form volume breaking, the slipping phenomenon can be reduced, and the drilling perpendicularity and the drilling efficiency can be improved; the heat on the cutting teeth is taken away in time, the temperature of the drill bit is reduced, and the service life of the drill bit is prolonged.

The application discloses a construction method for removing concrete around a cross-shaped steel plate joint of a diaphragm wall, which comprises the following steps: drilling a hole; grabbing a groove; installing a soil retaining member; tightly attaching a sharp tooth to the cross-shaped steel plate joint; moving up and down a grab bucket of a grooving machine to break the whole concrete structure around the cross-shaped steel plate joint; hanging a wall shoveling device on the grab bucket of the grooving machine, moving up and down the grab bucket of the grooving machine to shovel off the remaining concrete around the cross-shaped steel plate joint; replacing the wall shoveling device with a wall brushing device, tightly attaching the wall brushing device to the cross-shaped steel plate joint by the grab bucket of the grooving machine, and moving up and down the grab bucket of the grooving machine to completely remove the residual concrete around the cross-shaped steel plate joint. The construction method for removing the concrete around the cross-shaped steel plate joint of the diaphragm wall is suitable for removing the concrete around the cross-shaped steel plate joint of the diaphragm wall in a narrow space, the steps are reasonably designed, the steps are closely combined, the concrete around the cross-shaped steel plate joint of the diaphragm wall is completely removed, the construction difficulty is reduced, and the construction efficiency is improved.

The utility model discloses a belt sander sharp-tooth rubber wheel for polishing, which belongs to the technical field of gears and comprises a hub, rubber sharp teeth are detachably sleeved on the periphery of the hub, and each rubber sharp tooth comprises a tooth tip portion and a pressing portion. A boss is integrally formed on the inner side wall of the tooth tip part, one side of the hub is inserted into the boss, the other side of the hub is connected with a pressing part through a quick release assembly, and the outer side wall of the pressing part abuts against the inner side wall of the tooth tip part. And a plurality of anti-rotation blocks are arranged between the tooth tip part and the hub. According to the sharp-tooth rubber wheel of the belt sander for polishing, the sharp-tooth rubber which is abraded unevenly or damaged can be replaced conveniently, so that the service life of the sharp-tooth rubber wheel is prolonged, and the using effect of the sharp-tooth rubber wheel is guaranteed.

The invention belongs to the technical field of power distribution cabinet machining, and particularly relates to a power distribution cabinet plate cutting device which comprises a workbench, a disc cutting knife is rotationally arranged on the table top of the workbench, a rotating shaft is rotationally arranged in the workbench, and the disc cutting knife is fixed to the surface of the rotating shaft. Through composite cooling of the middle part and the cutting part of the disc cutting knife, the working temperature of the disc cutting knife can be effectively controlled, so that the tooth blade of the disc cutting knife always keeps stable hardness performance, the bonding wear between the tooth blade of the disc cutting knife and a plate is reduced, the passivation speed of the cutting edge is delayed, and meanwhile, the service life of the cutting edge is prolonged. According to the composite cooling design, overall heat accumulation of the disc cutting knife is restrained through middle pre-cooling, the temperature of a core cutting area is directly reduced through precise cooling of the cutting part of the disc cutting knife, the abrasion rate of the cutting knife is greatly reduced under the dual action, the disc cutting knife keeps sharp tooth blades, and the cutting efficiency is improved. And the disc cutting knife keeps precise shearing, and the stability of the finished product rate of cut plates is kept.

The invention discloses a slip and a surface hardening process thereof, and belongs to the technical field of oil-gas exploration, development and drilling engineering equipment. The surface hardening process of the slip comprises the following steps: carrying out thermal refining on a slip base body blank; and after thermal refining is completed, the slip is subjected to ion nitriding treatment. The invention further discloses the slip. According to the surface hardening process of the slip, a brand-new ion nitriding process is adopted for one-time hardening forming, the size precision is enough, the slip can be put into application without finish machining, and therefore the problem that the carburizing treatment surface hardening yield of the cylindrical sharp tooth slip is extremely low is solved; and meanwhile, laser quenching and common ion nitriding tooth tip point ablation are avoided, the occurrence of a soft belt at the tooth tip part is greatly eliminated and weakened, and the hardness and uniformity of the tooth tip are guaranteed.

A sheet pearl wool cutting working table comprises a rack and a table top plate arranged on the rack, and a material cutting device, a material spreading device, a cutting operation device and a sharp tooth chain dragging device used for dragging pearl wool are arranged on the rack. According to the pearl wool sheet stacking and cutting device, mechanical discharging and cutting of pearl wool coiled materials can be achieved, meanwhile, pearl wool sheets cut according to a certain length are stacked and then conveyed to a cutting station to be cut, and the pearl wool sheet stacks can be kept stable in the cutting process of the cutting station; and it is guaranteed that the size of a cut product is accurate, and the quality of the cut product is improved.

The invention discloses a fishing line assembly with an anti-cutting line safety structure, which comprises a switching component, a first anti-cutting line, a second anti-cutting line and a fishhook body, the switching component connects a fishing main line with the first anti-cutting line and the second anti-cutting line, and the other end of the first anti-cutting line and the other end of the second anti-cutting line are connected with a handle part of the fishhook body; the vertical length of the first anti-cutting line is smaller than that of the second anti-cutting line; the first anti-cutting wire and the second anti-cutting wire are connecting wires with tensile force. According to the fishing hook, when a fished object bites a hook and then gets rid of the fished object, the first anti-cutting line is straightened, so that the anti-cutting strength is reduced, after the fished object is instantly cut off due to impact of sharp teeth, the second anti-cutting line which is not straightened can still guarantee effective connection of the fishing hook body and the switching component, the fished object is prevented from escaping, the fishing rate is effectively increased, use is easy and convenient, and the fishing hook is worthy of popularization and application. And the interestingness of fishing is greatly improved.

Apparatus, consisting of a hinge (84) defining a hinge axis (88), and a pair of opposing jaws (80A, 80B), including a movable jaw and a fixed jaw having a predetermined part radiopaque, so that the fixed jaw location is identifiable from a fluoroscopic image of the fixed jaw. The opposing jaws terminate at proximal and distal regions, and the proximal regions are connected to the hinge so that the movable jaw rotates about the hinge between a closed state and an open state. The jaws are curved in planes parallel to the hinge axis, and terminate in narrowed ends at the distal regions, so that in the closed state the jaws grip sections of vertebrae. The apparatus also has a support structure (60) that retains the hinge and the pair of opposing jaws, and a multiplicity of sharp teeth (98) disposed on respective inner surfaces of the opposing jaws.

The utility model discloses a hard alloy circular saw blade for a trephine, which relates to the technical field of cutting and comprises a trephine body, a plurality of groups of saw teeth arranged circumferentially at equal intervals are arranged on the trephine body, each saw tooth consists of a left helical tooth, a right helical tooth and a sharp tooth, the right helical tooth is positioned between the left helical tooth and the sharp tooth, and the cutting edge angle epsilon of the left helical tooth and the right helical tooth is 5 degrees. The tool cutting edge angle epsilon of the sharp teeth is 15 degrees, the sharp teeth are in left-right inclined symmetrical design, centripetal angles with Tp being 1 degree are designed on the side faces of the left inclined teeth, the right inclined teeth and the sharp teeth, and circumferential angles with Tr being 3 degrees are designed on the side faces of the left inclined teeth, the side faces of the right inclined teeth and the side faces of the sharp teeth. Due to the design of the tool cutting edge angle, the cutting amount can be uniformly distributed during cutting, the cutting efficiency is improved, meanwhile, tipping during cutting is avoided to the greatest extent, and the service life of a product is prolonged; due to the design of the centripetal angle and the circumferential angle, the friction of the tooth side face to the workpiece is reduced, the cutting resistance is remarkably reduced, the temperature of the workpiece is reduced, and it is guaranteed that the cutting face of the workpiece such as wood, aluminum and plastic is smooth and free of focal marks.

The invention relates to the technical field of casing running, in particular to a full-bore floating casing running device which comprises an upper shell, a lower shell and a crushing assembly, and the crushing assembly comprises a crushing disc arranged on the lower portion of an annular boss in the upper shell and used for separating drilling fluid from slurry and a bearing ring arranged on the lower portion of the crushing disc and used for bearing the crushing disc. The annular convex block is arranged between the bearing ring and the inner wall of the upper shell and is used for supporting sharp teeth for crushing the crushing disc, and the shear pin is arranged on the annular convex block and is used for temporarily supporting the bearing ring; the pressure sensing assembly comprises a first pressure sensor, and the first pressure sensor is arranged on the inner wall of the upper shell and used for collecting a first pressure value of drilling fluid on a space formed by the crushing disc and the upper shell. And the situation that the drilling operation efficiency is seriously affected due to inaccurate crushing time of the crushing disc caused by high pressure in the well bottom is prevented.

The utility model relates to the technical field of welding, and discloses an ultrasonic welding head and ultrasonic welding equipment. The ultrasonic welding head comprises a welding head connecting part, a welding head force storage part and a welding head emitting part, the welding head connecting part is used for being connected with an ultrasonic welding equipment body, the welding head emitting part is connected with the welding head connecting part through the welding head force storage part, and the welding head emitting part is provided with a plurality of welding tooth structures in a truncated square cone shape. A first included angle is formed between the arrangement direction of the welding tooth structures and the edge of the welding head emitting part, and the value range of the first included angle is 10-80 degrees. Due to the design of the helical teeth, the teeth in the moving direction of the welding head are sharp teeth, so that the teeth of the welding head can be more effectively inserted into a deeper position, energy is concentrated to a welding area, and the welding efficiency is improved. Due to the design of the helical teeth, flowing of materials in the horizontal direction can be better controlled, and overflow in the welding process is reduced.

The application discloses a gear extrusion cigarette end extinguishing device, characterized in that two opposing force receiving cigarette extinguishing sharp tooth rollers under spring action are arranged between two parallel positioning wall plates, wherein an arc-shaped shaft hole corresponding to the position of the positioning wall plate is matched with the bearing at the two ends of the shaft, a main drive gear and a sub drive gear and synchronous transmission gears for driving the rotation of the two cigarette extinguishing sharp tooth rollers are arranged, the main drive gear is matched with a speed reducer motor, and a system that can make the two cigarette extinguishing sharp tooth rollers rotate towards each other and move to both sides to extrude the burning part of the cigarette end when the cigarette end passes through to make the cigarette end extinguish is formed.

The utility model discloses a high strength steel plate self-piercing rivet nut in the technical field of piercing rivet nut, including the nut body, be provided with the first annular platform on the nut body, be provided with the second annular platform on the first annular platform, the nut body, first annular platform and second annular platform integrated forming, the outside of first annular platform is provided with the gear ring, the junction of second annular platform and first annular platform is seted up with the groove, be seted up with the connecting hole on the second annular platform, the connecting hole penetrates the nut body, the inside of connecting hole is provided with internal thread. The utility model discloses a gear ring structure is seted up, the arc groove between the tooth on the gear ring tooth and tooth and the sharp tooth tip can better pierce the steel plate, embed the base material, avoid the anti -rotation failure caused by the high material hardness, can produce enough local stress in the riveting process, make the steel plate extrusion deformation, thereby form firm mechanical interlock.

A method for tissue repair using a mattress stitch is disclosed. The mattress stitch is created using a suture threader and suture construct using only one portal and without a shuttling step. The suture threader is provided with two sharp teeth or tines that pierce the tissue (or tissue and associated graft) at two different locations. The suture construct can be a loop that terminates in a tail. The tail passes from one tooth to another and is then secured within the securing mechanism of one of the two sharp teeth. The tail passes through the loop to form a cinch loop around and through the tissue (or tissue and graft).

The utility model provides a novel slurry throwing blade group suitable for paddy field operation, which comprises paddy wheels, slurry throwing cutters, a cutting disc and a cutter shaft, the paddy wheels, the slurry throwing cutters and the cutting disc are all mounted on the cutter shaft, the number of the paddy wheels is two, and the paddy wheels are respectively positioned at the left end and the right end of the cutter shaft; at least five large sawtooth-shaped cutting edges are arranged in the circumferential direction of the cutting disc, each large sawtooth-shaped cutting edge is provided with inclined sharp teeth, one tooth surface of each large sawtooth-shaped cutting edge is a short plane, the other tooth surface of each large sawtooth-shaped cutting edge is a long arc-shaped surface, and each long arc-shaped surface is provided with a plurality of small tooth-shaped cutting edges which are arranged in a straight line. The straw cutting and slurry crushing effects of the slurry throwing blade group are improved, and a loose and uniform soil environment is created for the growth of rice roots.

The invention discloses a sampling device for quantitative analysis of multi-source pollution in the technical field of sewage sampling, which comprises a sampling tank, a water pump, a water pipe, a power box and a breaking mechanism, a motor and a gear set driven by the motor are arranged in the power box, the breaking mechanism comprises a rotating shaft, one end of the rotating shaft is connected with the gear set, and the other end of the rotating shaft is connected with the water pump. A breaking cutter with a plurality of sharp teeth is arranged at the other end of the rotating shaft; when the water surface floating layer is broken, the breaking knife is inclined, and the lower end of the breaking knife is connected with the rotating shaft and the upper end is far away from the rotating shaft; the water pipe is arranged on the power box in a winding and unwinding manner; during sampling, the motor stops running, and the water pipe downwards extends into the water body from the side of the transmission shaft. According to the scheme, through the power box and the breaking mechanism, the floating layer is actively broken before sampling, the water pipe is prevented from stretching into the water body, the problem that an existing sampling device cannot efficiently sample when encountering hard floating objects is solved, and the sampling efficiency and the success rate are improved.

The invention discloses a joint easy to clean and sterilize and a foldable operation support applying the same. The joint comprises a joint base, a rotor, lock teeth and a lock bolt. The joint base comprises a joint base plate, an outwards-protruding lock bin and a side protruding block, wherein the lock bin and the side protruding block are arranged on the edge of the joint base plate. The joint base plate comprises a rotating shaft hole. The rotor comprises a fluted disc and a rotating shaft, the fluted disc comprises sharp teeth, and the rotor is installed in the joint seat and can rotate. The lock bolt penetrates through the lock side wall and makes contact with the tail end of the lock block, the lock bolt comprises a locking position and an unlocking position, when the lock bolt is located at the locking position, the lock bolt and the tail end of the lock block are in a compressed state, the lock teeth are forced to be inserted between the sharp teeth, and the lock teeth are locked. The lock cylinder is prevented from moving towards the direction far away from the rotating shaft hole so as to form locking; when the lock bolt is located at the unlocking position, the lock bolt and the tail end of the lock block are in a loosened state, and the lock cylinder can move in the direction away from the rotating shaft hole to achieve unlocking.

Apparatus, consisting of a hinge defining a hinge axis, and a pair of opposing jaws, including a movable jaw and a fixed jaw having a predetermined part radiopaque, so that the fixed jaw location is identifiable from a fluoroscopic image of the fixed jaw. The opposing jaws terminate at proximal and distal regions, and the proximal regions are connected to the hinge so that the movable jaw rotates about the hinge between a jaws closed state and a jaws open state. The jaws are curved in planes parallel to the hinge axis, and terminate in narrowed ends at the distal regions, so that in the closed state the jaws grip one or more sections of vertebrae. The apparatus also has a support structure that retains the hinge and the pair of opposing jaws, and a multiplicity of sharp teeth disposed on respective inner surfaces of the opposing jaws.

The application provides a cylinder straw feeding device for square straw bundling machine, which comprises a straw feeding device, and the straw feeding device comprises a bearing outer spherical ball bearing, a main wall plate, an end cover, a straw tooth, a straw tooth, a conveying roller shaft, a straw tooth reinforcing plate and an anti-winding roller; wherein the bearing outer spherical ball bearing, the wall plate and the end cover are sequentially installed at both ends of the conveying roller shaft, the anti-winding roller is arranged at the middle part of the conveying roller shaft, the straw teeth are equidistantly arranged on the winding roller in sequence, and the straw teeth are inclined to the shaft at a certain angle; the straw teeth are provided with the straw tooth in each row; the straw tooth is provided with a sharp tooth; and the non-working surface of the straw tooth is provided with the straw tooth reinforcing plate. The effect of the application is to prevent the straw from rotating with the roller and not falling off, and to facilitate the separation of the straw on the high-speed rotating roller. In order to enhance the strength of each straw tooth, a reinforcing plate is welded on the non-working surface of the tooth, and the stability of the tooth is improved.

Methods for tissue repairs with mattress stitch are disclosed. A mattress stitch is created with a suture passer and a suturing construct using only one portal and without shuttling steps. The suture passer is provided with two sharp teeth or tines that pierce tissue (or tissue and associated graft) at two different locations. The suturing construct can be a loop terminating in a tail. The tail is passed from one tooth to another and then secured into a securing mechanism of one of the two sharp teeth. The tail is passed through the loop to form a cinch loop around and through the tissue (or the tissue and the graft).