328 results about "Pressure groove" patented technology

The invention discloses a temperature and pressure sensor for a new energy automobile, and belongs to the technical field of sensor equipment, the temperature and pressure sensor comprises a plug assembly, a shell and a protective sleeve, a support seat, a circuit board, a temperature sensing probe and a pressure sensing element are arranged in the shell, the protective sleeve is arranged at the lower waist part of the support seat, and the temperature sensing probe is located in the protective sleeve and is in electric signal connection with the circuit board; a square groove for containing the pressure sensing element and the circuit board is formed in the top of the support base, the pressure sensing element is arranged at the bottom of the circuit board and is in electric signal connection with the circuit board, and a pressure transmission channel is further arranged in the shell. The pressure transmission channel comprises a gap part defined by a protective sleeve and a shell and a special-shaped channel formed in the support base, a circular pressure groove is formed in the square groove, the circular pressure groove is matched with the pressure sensing element to form a pressure cavity which is eccentrically designed relative to the shell in the axial direction, and the special-shaped channel is formed in a medium leading-in area. Therefore, the medium entering surface area can be increased through the eccentric design, and the response speed of medium pressure measurement is ensured.

The invention relates to the technical field of pressure sensors, and discloses a piezoresistive multi-range MEMS pressure sensor and a processing method thereof. The piezoresistive multi-range MEMS pressure sensor comprises: a pressed diaphragm; the mass blocks comprise a central mass block and a fixed mass block; the insulating layer is clamped between the pressed diaphragm and the mass block; the piezoresistor is arranged on one side, deviating from the mass block, of the pressed diaphragm; the at least two supporting frames are located in the pressure groove, each supporting frame surrounds the center mass block and is spaced from the center mass block, the supporting frame adjacent to the center mass block is connected with the center mass block through a first connecting beam, and the supporting frame adjacent to the fixed mass block is connected with the fixed mass block through a second connecting beam; every two adjacent supporting frames are connected through a third connecting beam. The piezoresistive multi-range MEMS pressure sensor disclosed by the invention is simple in structure and easy to process, and not only realizes multi-range acting force detection, but also realizes micro-range high overload measurement.

The invention provides an edge grinding machine for glass production, and belongs to the technical field of glass production. The edge grinding machine comprises an edge grinding wheel, an edge grinding driving mechanism, a conveying belt, a suction cup and a negative pressure box. Four groups of edge grinding wheels are distributed in an array; the edge grinding driving mechanism is used for simultaneously driving the four groups of edge grinding wheels to horizontally move relative to the four edges of the glass; the conveying belt is used for bearing and conveying glass, and multiple sets of negative pressure groove holes are formed in the conveying belt in a penetrating mode. The suction cup is slidably arranged in the negative pressure groove hole. The negative pressure box is arranged between the upper bearing section and the lower return stroke section of the conveying belt, the upper bearing section of the conveying belt is attached to the upper surface of the negative pressure box, and a negative pressure channel is formed in the top wall of the negative pressure box. According to the edge grinding machine for glass production, the four edges of glass can be ground at the same time, the glass edge grinding efficiency is improved, and the glass edge grinding quality can be guaranteed.

The utility model discloses an air tightness leak detection tool, which belongs to the technical field of air tightness detection, and comprises a detection tool body, an operation platform is fixedly connected to the upper end of the detection tool body, a fixed frame is fixedly connected to the upper end of the operation platform, and four uniformly distributed cylinders are embedded in the upper end of the fixed frame. The upper end of the detection tool body is fixedly connected with four evenly distributed positioning blocks, the positioning blocks are located on the lower side of the pressing block and correspond to the pressing block, a sealing column is arranged between the pressing block and the positioning blocks, a product is arranged in the sealing column, a sensor is fixedly installed at the outer end of the sealing column, and a pressing groove is formed in the bottom end of the pressing block. The bottom end in the pressing groove is fixedly connected with an embedded sealing gasket, the embedded sealing gasket is located on the outer side of the product and makes contact with the product, the product can be placed into the tool to be positioned, a button is started with two hands, and the air cylinder controls the tool to press downwards, so that the air tightness is detected.

The invention relates to the technical field of pipe fitting machining, in particular to plastic pipe cutting equipment with a pipeline anti-deviation structure, the plastic pipe cutting equipment comprises a cutting bottom frame and movable frames, the movable frames are rotationally arranged on the two sides of the top of the cutting bottom frame, and conveying positioning units are arranged in the two movable frames and on the two sides of the interior of the cutting bottom frame; a mounting frame is further fixedly arranged in the cutting bottom frame and located between the two movable frames, and a planetary cutting unit is further arranged in the mounting frame. By adopting a step-by-step process of pre-cutting and main cutting, a cutting servo electric cylinder drives a pre-cutting blade to form a concave positioning reference on the surface of a pipe to release local stress in advance, then full-depth cutting is completed through a main cutting blade, and stable rotation of a planet carrier in a rotating groove is matched, so that deformation of the pipe is remarkably reduced; the flatness of a cutting surface is improved; the edge grinding wheel in the negative pressure groove can grind the end face after cutting, and the quality of a finished product is further optimized.

This invention discloses a hydraulic forming device for a cab roof crossbeam, belonging to the field of hydraulic forming technology. It aims to solve the technical problem that due to the complex structure and numerous curvatures of the crossbeam, it is difficult to completely drain the forming fluid at low water levels. The device includes a fixed mold assembly and a moving mold assembly. The fixed mold assembly includes a base, with a fixed template installed in the inner cavity of the base. The top of the fixed template has a mold closing groove, a pressure groove, and a cavity. The moving mold assembly includes a lifting seat, with a moving template installed at its bottom. The bottom of the moving template has a mold closing plate, a pressure plate, and a forming fluid cavity. A punching assembly is arranged inside the moving template, including a lifting platform above the moving template and a draining rack inside the forming fluid cavity. The bottom of the lifting platform is connected to multiple round-hole punches and multiple square-hole punches, and the draining rack has a drainage channel inside its cavity. This invention not only achieves complete drainage of the forming fluid but also provides the advantage of continuous punching processing of the crossbeam.

This utility model discloses a dart impact testing machine for measuring material properties, comprising: a base with a mounting groove on its surface, a negative pressure chassis slidably inserted into the inner wall of the mounting groove, a mounting unit for limiting the position of the negative pressure chassis on the inner wall of the mounting groove, a negative pressure groove on the top of the negative pressure chassis, a pressure plate above the negative pressure chassis, a negative pressure unit, and a first driving unit, wherein the negative pressure unit applies negative pressure to the inside of the negative pressure groove. In this utility model, by creating a lifting groove on the surface of the base, and with a lifting block slidably inserted into the inner wall of the lifting groove, during use, the user rotates a threaded rod, which drives the lifting block, threaded onto the surface of the threaded rod, to slide along the inner wall of the lifting groove, thereby controlling the height of the impact dart and thus controlling the impact force.

The invention relates to the technical field of dies, and discloses a variable-diameter special-shaped nut continuous production die which comprises an upper die, an ejector plate, a female die plate, a material returning plate, a male die plate, a supporting plate and a base, the male die plate is installed on the base, a replacement assembly is arranged at the top end of the supporting plate, a guide adjusting assembly is arranged at the top end of the base, and the guide adjusting assembly is connected with the upper die. A male die plate is arranged on the upper die, a stripper plate movably sleeves the male die plate, an ejector plate and a female die plate are sequentially mounted on the lower surface of the upper die, a stamping assembly is mounted on the male die plate, and a sleeving hole corresponding to the stamping assembly is formed in the upper surface of the stripper plate and used for being movably mounted on the male die plate. A pressed groove hole is formed in the position, corresponding to the stamping assembly, of the female die plate. Fastening connection of the upper die body, the ejector plate and the female die plate is guaranteed through the short screws, the upper die body and the stripper plate are accurately aligned through the positioning pins, the upper die is connected with the base through the threaded nails, and the die can be rapidly and accurately installed in place.

The utility model relates to a mould frame for an automobile tail door mould, which comprises a bottom plate, guide pillar grooves are arranged at four corners of the bottom plate, a pressure groove is arranged at the center of the top of the bottom plate, and the side wall of the bottom plate is connected with an air injection nozzle communicated with the pressure groove. The multiple guide columns are installed in the guide column grooves in a one-to-one correspondence mode. The utility model relates to the technical field of die sets. According to the mold frame for the automobile tail door mold, a layer of air film can be generated between the mold and the bottom plate when the automobile tail door mold is placed on the bottom plate through the arranged air blowing assembly, so that the mold is prevented from being in direct contact with the bottom plate, meanwhile, the mold is supported, the friction force for moving the mold is very low, and the mold frame is very convenient to use. The position of the die can be easily adjusted, and alignment of the die and the bottom plate is facilitated.

The utility model relates to a high-speed rotary tablet press, which belongs to the technical field of high-speed rotary tablet presses and comprises a base, and a fixing groove is arranged on the upper surface of the base. According to the high-speed rotary tablet press, the rotary motor can be started to drive the tablet pressing disc to rotate, feeding is conducted on not less than two pressing grooves under cooperation of the feeding hopper, and after feeding is finished, the rotary motor is shut down; first electric push rods are started to drive not less than two downward pressing cylinders and not less than two ejector rods to move downwards and move into not less than two fixing grooves, and then second electric push rods on the left side and the right side are started at the same time; according to the tablet press, the two first electric push rods are arranged, the two or more ejector rods are driven to move downwards in the two or more pressing cylinders, tablets attached to the lower surfaces of the two or more pressing cylinders are ejected downwards, and the overhauling cost of the tablet press can be reduced by arranging the two first electric push rods.

The utility model relates to the technical field of air conditioner air pipe cleaning, and discloses a multi-nozzle rotary type air conditioner air pipe cleaning device which comprises a water storage tank, the front face of the water storage tank is fixedly connected with a control button, the upper surface of the water storage tank is fixedly communicated with a pressure pump, and the output end of the pressure pump is fixedly communicated with a first steel wire woven rubber hose. According to the device, through mutual cooperation of a conical flushing shell, an adjusting shell, an extension shell, a threaded limiting barrel, a pressure groove, a reset spring and an extrusion plate, the spraying direction of a spray head can be flexibly adjusted, the threaded limiting barrel is rotated to move towards the front of the conical flushing shell so as to push the extension shell, and the extension shell pushes the extrusion plate so as to extrude the reset spring; the adjusting shell can be limited to continue to overturn, the purpose of flexibly adjusting the direction of the spray head according to different air pipe conditions can be achieved, and the problems that due to the fact that the spray head cannot be flexibly adjusted, part of areas cannot be effectively cleaned, and the cleaning coverage rate is limited are solved.

The utility model relates to the field of heat-shrinkable sleeves, in particular to a heat-shrinkable sleeve traction device which comprises a working table, an unwinding assembly and a winding assembly are installed at the two ends of the outer wall of the top of the working table respectively, a downward pressing hole is formed in the center of the working table, and a pressure applying structure is arranged on the outer wall, located at the downward pressing hole, of the working table. The unwinding assembly comprises a first vertical rod, an adjusting groove formed in the outer wall of one side of the first vertical rod, a first lead screw rotationally connected to the center of the adjusting groove, a first threaded block in threaded connection to the outer wall of the first lead screw and a cylinder welded to the outer wall of one side of the first threaded block. The pressing structure comprises a pressing rod welded to the workbench and located in the center of the lower pressing hole, and a pressing groove formed in the outer wall of one side of the pressing rod. The second lead screw drives the lower pressing wheel to move up and down through the second threaded block, the traction force on the heat shrink tube sleeve is increased or reduced, the tightness of the wound heat shrink tube sleeve is improved, the traction force is convenient to adjust, and traction is convenient.

The invention relates to the technical field of mechanical property test equipment, in particular to a confining pressure device used in a Hopkinson test, comprising: an equipment box provided with a confining pressure groove; the confining pressure assembly comprises a hydraulic mechanism and an elastic confining pressure mechanism; the mechanical pressure equalizing assembly comprises a mechanical limiting mechanism and a locking mechanism; the self-compensation sealing assembly comprises a movable sealing mechanism and a follow-up pressing mechanism; through cooperative work of the hydraulic mechanism, the elastic confining pressure mechanism and the mechanical pressure equalizing mechanism, the large-range pressure adjusting capacity is guaranteed, pressure fluctuation is buffered through an elastic element, uniform and stable application of radial pressure of a test piece is achieved, the mechanical limiting mechanism is locked by the locking mechanism in the test process, mechanism displacement caused by impact vibration is eliminated, and the test efficiency is improved. The pressure field space distribution is ensured to be constant; a movable sealing mechanism and a follow-up pressing mechanism in the self-compensation sealing assembly dynamically adjust the sealing force, and the leakage problem caused by abrasion of a sealing piece is effectively solved.

The invention discloses a robot feeding and clamping device, and relates to the technical field of mechanical design and manufacturing, the robot feeding and clamping device comprises a mechanical arm, one end of the mechanical arm is fixedly connected with a fixed outer frame, and the surface of the fixed outer frame is slidably connected with a pressing frame for clamping an object; a power circular plate for adjusting the clamping state of materials is arranged in the fixed outer frame, a fourth spring for preventing the clamped materials from being separated is arranged in the pressing frame, a dough pressing block for conducting secondary clamping on the materials so as to improve the conveying stability of the materials is arranged in the pressing frame, and an extending block at one end of a seventh groove synchronously slides along with the pressing block. The pressing block is arranged in the pressure groove and drives the sealing block to slide in the pressure groove, the sealing block makes contact with the inclined face of the pressure groove, the sealing block is pushed by the inclined face of the pressure groove to slide towards the material along the lower surface of the pressing block, then a baffle is formed below the material, and the purpose of preventing the clamped material from falling off is achieved.

An integral V-shaped thrust rod assembly and a vehicle applying the same relate to the technical field of vehicle accessory devices, the integral V-shaped thrust rod assembly comprises a triangular plate, three corners of the triangular plate are respectively and fixedly provided with a main sleeve and two auxiliary sleeves, the middle part of the triangular plate is provided with a first weight reduction groove, and the first weight reduction groove is triangular; a-shaped pressing grooves are formed in the two sides of the triangular plate. According to the integral V-shaped thrust rod assembly, local connection of the axle assembly and the frame assembly is achieved, transmission of longitudinal force and transverse force can be achieved, the triangular structure has the advantage of being high in stability, and the integral V-shaped thrust rod assembly is high in fatigue resistance and reliability.

The utility model discloses a filling machine with a clamping and positioning function, which relates to the technical field of wine filling, and comprises a cabin, a servo motor is fixedly mounted at the top of the cabin, a threaded rod is fixedly connected to the other end of the output end of the servo motor, a belt pulley is fixedly connected to the surface of the threaded rod, and the belt pulley is fixedly connected to the other end of the output end of the servo motor. The threaded rod is rotationally connected to the top of the cabin, and the other side of the cabin is also rotationally connected with a threaded rod. According to the filling machine with the clamping and positioning functions, a downward pressing arm extrudes a downward pressing groove to drive a sliding block to slide in a sliding groove, when the sliding block slides, a stabilizing rod extrudes a fourth spring to enable the fourth spring to be extruded and contract, and when the sliding block moves, the sliding rod and a clamping block are driven to move relatively; and when the rubber strips in the clamping blocks clamp the wine bottles, the situation that scratches are generated on the surfaces of the wine bottles, and the attractiveness of the wine bottles is affected can be prevented.

The invention discloses a double-arc-shaped bridge structure for rapid butt joint assembly, and relates to the technical field of double-arc-shaped bridges, the double-arc-shaped bridge structure comprises a main connecting beam and secondary connecting beams, the secondary connecting beams are symmetrically mounted on the two sides of the main connecting beam, and arc-shaped supporting frames are fixed to the bottoms of the main connecting beam and the secondary connecting beams through supports; one side of a V-shaped rod is clamped into a vertical clamping block, and when the V-shaped rod rotates, a connecting block connected with one end of a secondary connecting beam and one end of a primary connecting beam enters an abutting groove in a locking block, so that limiting shells at the ends of the primary connecting beam and the secondary connecting beam are clamped with limiting shells in the abutting groove, and semicircular blocks in the limiting shells rotate; when the square lock holes in the semicircular blocks coincide, the V-shaped rods rotate to drive the cams in the pressing grooves to rotate, the cams rotate to press the pressing columns downwards, the lock heads located at the ends of the pressing columns enter the square lock holes, locking and clamping of the connecting blocks between the main connecting beam and the secondary connecting beam are completed, and the main connecting beam and the secondary connecting beam are integrally installed conveniently.

The invention discloses a test tube cleaning device for experiment teaching, and relates to the technical field of container inner wall cleaning. The cleaning device comprises a cleaning box, one side of the cleaning box communicates with a four-way conveying valve, a placing mechanism is arranged in the cleaning box, and the placing mechanism comprises a placing plate fixedly connected to the interior of the cleaning box. The test tubes are stably fixed through cooperative movement of the placing mechanism, when the test tubes are vertically placed on the placing plate, a supporting plate and a cushion block jointly limit the bottoms of the test tubes to prevent transverse deviation, then a screw of the pushing assembly rotates, a pressing plate is driven to tightly buckle the arc portions of the test tubes through a downward pressing groove, and vertical bidirectional clamping is formed; and through cooperation of the limiting plate and the limiting block, rotation of the threaded sleeve is further avoided, vertical movement of the pressing plate is ensured, the problem that the test tubes shake in a traditional device is effectively solved, the test tubes are kept stable during high-speed cleaning, cleaning dead corners or test tube damage caused by displacement are avoided, and the cleaning uniformity and safety are effectively improved.

This application relates to the technical field of feeding guide structures, and in particular to a feeding guide structure for a hot melt machine. The structure includes a hot melt machine body, a mounting frame installed on one side of the hot melt machine body, a rotating roller rotatably connected between the two sides of the mounting frame, and a pressure roller rotatably connected to the top of the mounting frame. Movable grooves are formed on the top surfaces of both sides of the mounting frame, arranged vertically along the mounting frame. The two ends of the pressure roller are respectively located within the adjacent movable grooves, and the outer wall of the pressure groove abuts against the outer wall of the rotating roller. The feed inlet of the hot melt machine body is aligned between the pressure roller and the rotating roller. A guide plate is installed between the two sides of the mounting frame, located at the bottom of the rotating roller, with its output end aligned with the feed inlet. The guide plate is inclined, with the inclination direction from top to bottom from the outlet to the feed inlet, which can improve the feeding efficiency of different materials.

The utility model provides a computer network port with a mounting structure, which relates to the technical field of computer network port mounting and comprises a network port body, a sliding groove block is fixedly connected to the top of the network port body, and two anti-falling grooves are formed in one end of the sliding groove block. According to the utility model, on the basis that the normal network connection of the network port body is not influenced, the aluminum shell arranged in the mounting mechanism and the sliding block connected with the aluminum shell are matched with the connecting groove, so that the aluminum shell and the sliding block can be mutually connected with the sliding groove block connected to the network port body; when the aluminum shell is assembled and disassembled, the anti-disengagement groove formed in the sliding groove block can be connected with the anti-disengagement piece connected with the aluminum shell, so that the anti-disengagement effect can be achieved, when the aluminum shell needs to be assembled and disassembled, the aluminum shell is pushed in the opposite direction, and the clamping groove block in the pressing groove formed in the sliding block and the elastic clamping block in the supporting groove formed in the sliding groove block are disconnected; therefore, when the network port or related hardware breaks down, the network port or the related hardware can be conveniently disassembled and replaced.

The application discloses a kind of suspension oil cylinder of dynamic bearing lateral force, method and engineering machinery, including cylinder, piston, piston rod and cylinder cover;Piston coaxial fixed connection is in piston rod left end;Piston is coaxially installed in cylinder, and piston left side is oil cylinder big cavity, and piston right side is oil cylinder small cavity;Cylinder right side is coaxially fixed and installs cylinder cover;Cylinder cover center is opened with round hole, and piston rod is coaxially passed through round hole, and and round hole form gap sealing cooperation;The inner wall of the round hole in the center of cylinder cover upside is opened with pressure groove I, this pressure groove I is connected with oil cylinder big cavity by communicating part;The inner wall of the round hole in the center of cylinder cover downside is opened with pressure groove II, and hole is opened in cylinder cover and connects pressure groove II and oil cylinder small cavity;Piston upside cylindrical surface is opened with pressure groove III, simultaneously piston is opened with hole and connects pressure groove III and oil cylinder small cavity;Piston downside cylindrical surface pressure groove IV, simultaneously piston is opened with hole and connects pressure groove IV and oil cylinder big cavity.The application has the characteristics of dynamic bearing lateral force.

The utility model relates to an elastic coefficient testing mechanism for a spring, which is provided with a working platform. A positioning assembly and a testing assembly are arranged on the working platform, the positioning assembly comprises a fixed seat, a double-thread screw, a positioning sliding block and pressing blocks, a threaded inner hole is formed in the positioning sliding block, each pressing block is provided with a pressing groove, and the testing assembly comprises a driving motor, a movable seat, an adjusting rod, two mounting grooves, a force application rod and a pressure tester. The adjusting rod is provided with an adjusting thread part, the moving seat is provided with an adjusting screw hole, the adjusting rod is further provided with a stop ring, the side edge of the working platform is provided with scales, the side edge of the moving seat is fixedly provided with an indicating plate, and each pressing block fixes one end of a spring. And after penetrating through the spring, each force application rod presses and positions the other end of the spring through the matching of the adjusting screw hole and the adjusting thread part. The device is ingenious in structure, convenient and practical.

The utility model discloses a pipeline buckle bending tool which comprises a base and a pressing rod. Two die holders are arranged at the two ends of the top of the base respectively, a V-shaped pressing groove is formed in one die holder, and an arc-shaped pressing groove is formed in the other die holder; the pressing rod is rotationally connected to the base, the two sides of the pressing rod are connected with a V-shaped pressing strip and a pressing pipe, and when the pressing rod is rotated, the V-shaped pressing strip falls into the V-shaped pressing groove, or the pressing pipe falls into the arc-shaped pressing groove. Compared with the prior art, enterprises are equipped with buckle bending tools of different models, or each buckle bending tool is matched with a die holder, a V-shaped pressing strip and a pressing pipe of different sizes, so that workers of an equipment department can be assisted to quickly and conveniently manufacture pipe buckles according to the requirements of different pipe diameters, the working efficiency is improved, the flexibility is higher, and the production cost is reduced. The system adapts to the requirements of flexible production plan arrangement of modern production factories, and quickly responds to and solves actual problems in production work.

The utility model discloses an ejector pin mechanism of a spring machine, which relates to the technical field of spring processing equipment and comprises a sliding rail and a sliding seat slidably mounted on the sliding rail, a connecting seat is mounted at the front end of the sliding seat, an adjusting seat is rotatably embedded in the connecting seat, an ejector pin is detachably fixed at the front end of the adjusting seat, and the ejector pin is fixed on the sliding rail. A pressing groove for guiding a steel wire to form a spring is formed in the side wall, attached to a wire outlet of the spring machine, of the front end of the ejector pin, and a limiting piece for limiting the adjusting base is further arranged in the connecting base. A mounting hole for movably inserting the adjusting seat is formed in the middle of the connecting seat, and a second screw hole is formed in the outer side wall of the connecting seat; through the arrangement of the connecting seat, the adjusting seat and the limiting piece, the effect of producing springs with various pitches without replacing the ejector pin is achieved, the number of needed matched ejector pins is reduced, and therefore the equipment cost of the ejector pin mechanism of the spring machine is reduced.

The invention discloses dam body leaking stoppage equipment and a leaking stoppage method, and relates to the field of grouting repair devices. Dam body leaking stoppage equipment comprises a hydraulic splitting machine and an inserting rod, a connecting rod is fixedly connected to the telescopic end of the hydraulic splitting machine, the inserting rod is connected to the connecting rod in a threaded mode, the dam body leaking stoppage equipment further comprises two sets of double-wing grooving plates which are both rotationally connected to the inserting rod, and after the two sets of double-wing grooving plates are spliced together, the dam body leaking stoppage equipment with the middle round and the middle round can be formed. After the groove plates with the extending ends on the two opposite sides are pressed into soil, splitting grooves can be formed in the dam body. The pressing strip is fixedly connected to the bottom of the double-wing grooving plate; the transverse pressing grooves are formed in the splitting grooves in a pressing mode, the guiding effect can be achieved, grouting liquid can flow towards the extending ends on the two sides along the pressing grooves, the situation that the splitting grooves are damaged due to direct impact of grouting liquid is avoided, and meanwhile leakage caused by the fact that the grouting liquid permeates into soil at the non-extending ends is reduced.

The utility model relates to a rabbit head fixing device with an anti-suffocation function, which belongs to the technical field of rabbit head fixing in experimental operations, and comprises a mask, an upper block body arranged at the upper part and a lower block body arranged at the lower part, the upper block body is provided with an upper tooth socket used for sleeving the upper incisor of a rabbit, and the lower block body is provided with a lower tooth socket used for sleeving the lower incisor of the rabbit. The lower block body is provided with a lower pressing groove used for sleeving the lower incisor of the rabbit. The fixing band is connected to the mask and is used for detachably and fixedly connecting the mask to the test bed; the mask is provided with a through hole, the breather pipe is inserted and fixed in the through hole, and the breather pipe is used for being inserted into the mouth of a rabbit and communicated with the air pipe of the rabbit. By means of the structure, the rabbit head fixing device enables the head of a rabbit to be stably fixed to a test bed, stability and accuracy of an experiment are guaranteed, suffocation of the rabbit in the experiment process can be avoided, the rabbit head fixing device is easy and convenient to wear on the head of the rabbit, the operation can be completed by a single person, and damage to the rabbit due to the fixing mode of the rabbit head is smaller; and the rabbit feels more comfortable.

The utility model is suitable for optical glass transportation component technical field provides a kind of optical glass carousel transport protection device, including metal support disc, metal support disc one side is equipped with nylon connecting disc, connecting mechanism is equipped between nylon connecting disc and metal support disc, and nylon connecting disc is installed on metal support disc by connecting mechanism. Connecting mechanism includes multiple negative pressure grooves, and negative pressure groove is opened in metal support disc, and first passageway is opened in metal support disc, and multiple second passageways that are circumferentially arrayed are opened in first passageway inner side, and second passageway other end is communicated with negative pressure groove, and metal support disc provides rigid support, and nylon connecting disc provides buffer, and the flexibility of whole mechanism is increased by the combination of both. When being subjected to vibration and bump, nylon connecting disc can absorb and disperse part of energy, effectively reduce the impact force suffered by optical glass carousel, thereby greatly reduce its possibility of breaking in transportation.

The utility model discloses a cable bridge installation specialized hoop, including mounting seat, hoop structure and support structure, the hoop structure includes base, anti-wear pad no. 1, limit seat, bolt, rotatory extrusion bolt, rotatory seat and extrusion fixed pressure groove, the base is fixed on the mounting seat, anti-wear pad no. 1 is pasted in the base, limit seat no. The limiting seat is detachably arranged on the first anti-abrasion pad, the bolt penetrates through the limiting seat and is in threaded arrangement with the base, the rotating extrusion bolt penetrates through the limiting seat and is in threaded rotation arrangement, the rotating seat is rotationally arranged on the rotating extrusion bolt, and the extrusion fixing pressing groove is fixedly formed in the rotating seat. The utility model belongs to the technical field of cable bridge equipment, and particularly relates to a special clamp for cable bridge installation, which effectively solves the problems that the special clamp for cable bridge installation in the current market is integrally arranged, the cable is troublesome to disassemble and replace, and lines are easy to be disordered.

The utility model relates to the technical field of hearing aids, in particular to a sweat-proof hearing aid, which comprises a hearing aid provided with earplugs. The hearing aid is provided with a flow guide mechanism, the flow guide mechanism comprises a supporting rod and a flow guide shell, one end of the supporting rod is fixedly connected with a supporting plate, the supporting plate is fixedly connected with a round pipe, one end of the round pipe is fixedly connected with a limiting plate, and a pressed groove is formed in the middle of the limiting plate. The hearing aid is characterized in that the supporting plate is provided with a circular tube, the supporting plate is provided with an extrusion bolt, the position of the supporting plate corresponding to the circular tube is in threaded connection with the extrusion bolt, the outer wall of the flow guide shell is provided with a connecting groove, and the position of the outer wall of the flow guide shell corresponding to the connecting groove is provided with a limiting groove. Therefore, a solid protective barrier is built for the hearing aid, and the service life of the hearing aid is greatly prolonged.

The utility model discloses a sliding airtight window corner pulley and a sliding door and window, and belongs to the technical field of door and window accessories. The device comprises a base which is provided with a guide chute; the bearing seat is arranged on the base in a sliding manner, a pulley is rotatably mounted on the bearing seat, and an inclined side pressing groove is formed in the bearing seat; the pull rod is arranged between the base and the bearing seat, one side of the pull rod is rotationally connected with a limiting rolling sleeve, the other side of the pull rod is rotationally connected with a sliding rolling sleeve, the limiting rolling sleeve is slidably arranged in the guide sliding groove, and the sliding rolling sleeve is slidably arranged in the side pressing groove. When the pull rod is pulled, the two sides of the pull rod interact with the base and the bearing seat through the limiting rolling sleeve and the sliding rolling sleeve correspondingly, so that transmission stress on the two sides of the pull rod is relatively balanced, the inclination phenomenon caused by single-side stress of the pull rod is effectively reduced, friction between the pull rod and other parts is reduced, and the long-term stability of the pull rod is guaranteed. In addition, the pull rod is located between the base and the bearing seat, and transmission of the pull rod can be more stable and reliable.