38results about How to "Snap tight" patented technology

The utility model discloses an alternating current and direct current integrated shore power pile, which comprises a charging pile, the charging pile is arranged on an external identification, a fixing mechanism is arranged on the charging pile, the fixing mechanism comprises a bottom sleeve, a connecting sleeve, a fixing sleeve, a positioning sleeve, a push disc, a clamping mechanism, a top pipe, a rotating sleeve and a synchronizing mechanism, the bottom sleeve is arranged on the side wall of the charging pile, and the connecting sleeve is arranged on the side wall of the bottom sleeve. A positioning sleeve is installed on the fixing sleeve, a positioning groove is formed in the top sleeve, the positioning sleeve is clamped in the positioning groove, a push disc is installed on the fixing sleeve, a threaded groove is formed in the bottom sleeve, and through cooperation of the bottom sleeve, the connecting sleeve, the fixing sleeve, the positioning sleeve, the push disc, the clamping mechanism, the jacking pipe, the rotating sleeve and the synchronizing mechanism, accurate fixation of a cable can be achieved through the fixing mechanism; by means of the design, the fixing efficiency is improved, and the adaptability and the using effect of the alternating-current and direct-current integrated shore power pile are guaranteed.

The utility model relates to the technical field of window sash installation provides a curtain wall glass sash line structure, including curtain wall, window sash and line module, curtain wall with window sash is connected, line module sets up in window sash, window sash includes first window frame and second window frame, installs window glass on first window frame, window glass is connected with the clamping sash material, the first clamping groove is seted up in the clamping sash material, one end of line module is installed on first window frame, the other end of line module is inserted in first clamping groove, the clamping sash material is connected with first sealing strip between second window frame, the connecting place between first window frame with curtain wall is equipped with second sealing strip and third sealing strip respectively, the utility model solves the problem that traditional line structure installation procedure is complicated and the problem of insufficient sealing performance, and has simple structure and low manufacturing cost's advantage.

The utility model discloses a kind of vertical cabinet board diagonal connecting piece and cabinet body, it is related to the technical field of furniture accessories, the utility model aims to solve the problem that the strength is lower when existing connecting piece is applied to the connection of 9mm cabinet board vertical diagonal, obvious top hole or connection trace will be stored on cabinet board, the utility model includes arc connecting body, the connecting body middle part is provided with protruding connecting part and recessed avoidance slot, the connecting part is close to the surface on the side of avoidance slot and is provided with clamping body, two connecting holes are set in the upper and lower sides of the avoidance slot, and the two connecting holes are respectively provided in the upper and lower sides of the avoidance slot;The convex blade is provided on the two arc-shaped edges of the connecting body.

The application discloses an electronic atomizer, which comprises a rotating column, a first main body part, a second main body part and a limiting assembly. The first main body part is connected to one end of the rotating column and is provided with a first through hole. The second main body part is provided with a connecting groove in a sleeving mode with the rotating column and is provided with a second through hole. The limiting assembly is arranged in the rotating column and comprises an elastic member and two limiting blocks. The elastic member is in a compressed state. At least two matching structures are arranged on the groove wall of the connecting groove. In a closed state of the electronic atomizer, the first through hole is closed by the second connecting side, the second through hole is closed by the first connecting side, and the two limiting blocks are clamped with the two matching structures. In a communication state of the electronic atomizer, the first through hole and the second through hole are opposite and in communication, and the two limiting blocks are clamped with the two matching structures. The electronic atomizer is smooth in rotation switching and stable in connection after rotation.

The utility model belongs to the technical field of illumination, and relates to an underwater multispectral plant production lamp which comprises a heat dissipation column, a transparent shell, an upper cavity cover and a lower cavity cover, the heat dissipation column is hollow, a light source plate is arranged on the periphery of the heat dissipation column, and threaded connectors are further arranged at the two ends of the heat dissipation column. The transparent shell is arranged outside the heat dissipation column in a sleeving manner; the upper cavity cover and the lower cavity cover are connected to the upper end and the lower end of the heat dissipation column through the threaded connectors respectively, clamping grooves are further formed in the upper cavity cover and the lower cavity cover, and the two ends of the transparent shell are clamped in the clamping grooves of the upper cavity cover and the clamping grooves of the lower cavity cover respectively. According to the underwater lamp, the heat dissipation column is adopted as a core structure, the light source plate is installed on the periphery of the heat dissipation column, and the heat dissipation column enables light emitted by the light source plate to be irradiated at the 360-degree all-dimensional angle. The omnibearing illumination mode can ensure that all parts of underwater plants such as seaweeds in a deep water area can receive light uniformly.

The utility model relates to the technical field of machining, and discloses a machined part clamping device which comprises a device base, connecting blocks are movably connected to the two sides of the outer surface of the upper end of the device base, an adjusting connecting plate is fixedly connected to the outer surface of the upper end of each connecting block, and a direction adjusting block is movably connected to the outer surface of one side of each adjusting connecting plate. Clamping plates are detachably connected to the two ends of the outer surface of one side of the direction adjusting block, when the device is used, a rotating column can be driven by a motor to rotate, the direction adjusting block is rotated while the rotating column rotates, a machined part can be clamped up and down or left and right according to needs, and a rectangular inserting block is inserted into a rectangular inserting hole, so that the machining precision is improved. And when the rectangular clamping blocks reach the positions of the rectangular clamping holes, the rectangular clamping blocks are connected with the rectangular clamping holes in a clamped mode, the clamping plates are fixed, meanwhile, under the action of first springs, the rectangular clamping blocks and the moving blocks are connected in a clamped mode more tightly, the clamping plates can be replaced conveniently, and practicability is improved.

The utility model provides a module installation fastener, an installation workpiece, a module installation structure and a display device. The module mounting fastener comprises a flange; the first claw petals are located on the first side of the flange, all the first claw petals are arranged at intervals in the circumferential direction of the flange, the first ends of all the first claw petals are connected to the flange, and the second ends of all the first claw petals can be elastically gathered together or deviated from one another; the outer wall of the first claw petal is used for being connected with a first external structure in a clamped mode. The first claw petals are located on the first side of the flange, the second claw petals are located on the second side of the flange and arranged at intervals in the circumferential direction of the flange, the first ends of the second claw petals are connected to the flange, and the second ends of the second claw petals can be elastically gathered together or deviated from one another; the inner wall of the second claw petal is used for being connected with a second external structure in a clamped mode. The module mounting structure comprises a module base, a plug connector and the module mounting fastener.

The utility model provides a rock wool fireproof sandwich panel for a color steel house building, and relates to the technical field of rock wool fireproof sandwich panels, the rock wool fireproof sandwich panel for the color steel house building comprises a rock wool sandwich panel assembly, the upper surface of the rock wool sandwich panel assembly is provided with a plurality of bolt protection assemblies, and the bolt protection assemblies are arranged on the upper surface of the rock wool sandwich panel assembly. Sealing assemblies which are matched with each other for use are arranged on the two sides of the rock wool sandwich panel assembly. The two rock wool sandwich board assemblies are spliced, the inner clamping board and the outer clamping board are connected in a clamping mode, then the conical head enters the corresponding circular clamping groove, the glue outlet is communicated with the rectangular groove, and when edge sealing glue is arranged in the circular clamping groove, the conical head enters the inner cavity of the circular clamping groove to pierce the edge sealing glue, so that the edge sealing glue is sealed. And the edge sealing colloid is extruded and overflows from the gap between the inner clamping plate and the outer clamping plate to fill the gap between the outer clamping plate and the inner clamping plate which are clamped together, so that the clamping between the gaps is tighter, and the waterproof sealing performance is improved.

The utility model relates to the technical field of infants, in particular to a rotary two-lock device and a baby carriage. The rotary double-lock device comprises a first swing part, a second swing part, a first locking part and a second locking part. In the operation process, unlocking operation can be completed only by rotating and pressing the second locking piece, due to the fact that the rotating direction is perpendicular to the force application direction of clamping connection of the limiting step and the edge of the limiting hole, tight clamping connection of the limiting step and the limiting hole can still be guaranteed during long-term work, the first locking piece is unlocked through pressing, and the locking effect is good. And the possibility that the first locking piece is unlocked by mistaken touch is greatly reduced. And after the external force is removed, the second locking piece and the first locking piece can be locked under the action of the second bias pressing piece and the first bias pressing piece respectively, and the operation is simple and convenient.

The invention relates to the technical field of numerical control machine tool swinging heads, in particular to a five-axis linkage numerical control machine tool bidirectional rotating swinging head which comprises a C-axis swinging head and an A-axis swinging head, a C-axis driving system is installed on the C-axis swinging head, a hollow connecting block is arranged on the C-axis swinging head, first shells are fixedly arranged at the two ends of the hollow connecting block respectively, and a second shell is arranged on the A-axis swinging head. The outer wall of the second shell slides with the inner wall of the first shell, a connecting shaft is rotationally connected to the interior of the first shell, a first gear is connected to the peripheral wall of one end of the connecting shaft in a sleeving mode, a locking assembly is clamped to the upper end of the first gear, a push block is arranged on the locking assembly, and a plurality of sliding rods are slidably connected to the push block. The first gear can be conveniently rotated to different positions and angles to be tightly clamped, error accumulation after the connecting shaft stops rotating is reduced, the product quality is ensured, the stability of the A-shaft swing head is enhanced, the A-shaft swing head is not prone to vibration or deviation, and the machining effect is further improved.

This utility model discloses an auxiliary device for improving the accuracy of gas chromatography determination of N,N-dimethylformamide in water, belonging to the technical field of N,N-dimethylformamide determination. This auxiliary device includes an auxiliary mechanism and a filtration mechanism. The auxiliary mechanism includes a housing with a door hinged to one side of the upper end via a pair of hinges. A water inlet pipe is installed at the upper end of the door, and a drain pipe is installed at the center of the bottom end of the housing. A limiting frame is installed at the bottom of the housing. The filtration mechanism includes a mounting frame with a pair of equal-dividing plates fixedly installed inside. Slide rails are installed on both sides of the mounting frame at the bottom of the pair of equal-dividing plates. A filter layer and an adsorption layer are slidably installed between the two pairs of slide rails. This utility model can effectively improve the accuracy of gas chromatography determination of N,N-dimethylformamide and has high practical value.

This invention discloses a lifting system for battery box hoisting, comprising a main square tube with two side arm assemblies at both ends. Each side arm assembly has two sliding structures horizontally slidably mounted on both ends. A hanging assembly is mounted on the bottom surface of the sliding structure, and a locking structure is located on the side of the sliding structure away from the main square tube. When the hook in the hanging assembly is in the hoisting state, it can be positioned at either the second or first hoisting opening. The two positions allow for quick adjustment to accommodate different types of battery box structures. Simultaneously, the sliding structure can be significantly adjusted on the side arm assemblies and locked using the locking structure, achieving a wide range of adjustments. These two adjustment methods allow for flexible application of this lifting system in hoisting operations of battery boxes of different sizes, with rapid adjustment, no need for power installations, low cost, and better overall rigidity.

The electric vehicle controller comprises a controller body, control lines, a connector body and a sealing check ring, the control lines are all arranged on one side of the controller body, the connector body is connected to the ends, away from the controller body, of the control lines, and the sealing check ring is arranged on the connector body. Joint inserting holes are formed in the connector body at equal intervals, the sealing check ring is arranged on the outer wall of one end of the connector body, an annular groove is formed in the inner wall of one side of the sealing check ring, and a second sealing rubber ring adheres to the interior of the annular groove. The outer wall of one end of the controller body is provided with a bunch interface, and the interior of the bunch interface is provided with a bunch joint. Through a double-sealing structure, the connector is good in sealing effect, dustproof, waterproof and stable in connection, and the situation of poor contact or damage caused by dust and water entering is not prone to occurring.

This utility model discloses a positioning device for steel structure engineering construction, relating to the field of engineering construction technology. It includes a grooved plate with two symmetrical straight rods hinged to its inner wall. Each straight rod has a U-shaped locking plate hinged to its far end, and both straight rods have sliding grooves on their bottom surfaces. A piston cylinder located at the lower part of the grooved plate has two symmetrical piston rods slidably connected to its inner wall. This utility model has a reasonable design structure. It allows contact with the steel structures on both sides through rubber layers and rubber granules fixedly connected to the outer surfaces of the two U-shaped locking plates. During the process, the piston rods move outwards along the inner wall of the piston cylinder. By rotating the limiting bolts, the limiting bolts penetrate the piston cylinder and engage with the outer surface of the piston rods, limiting the position of the piston rods on the inner wall of the piston cylinder. The device is easy to engage with steel structures of different spacings and provides auxiliary restraint for the user's upper body, improving the safety of users working at heights.

The utility model discloses a pipeline clamping connection structure, which belongs to the technical field of pipeline connection and comprises a container body, a mounting hole is arranged on the container body, a clamping piece is mounted in the mounting hole, a rubber sealing ring is arranged outside the clamping piece, a retainer ring is arranged outside the rubber sealing ring, and a clamping mechanism is clamped on the clamping piece. The clamping piece is fixed on the outer wall of the container in a buckling mode, and the clamping mechanism is fixed on the clamping piece in a buckling mode, so that connection of the clamping mechanism and the container body is achieved, installation operation can be carried out on the outer side of the container, the container does not need to be opened, the structure is simple, the operation difficulty is low, and when the clamping piece tends to fall off, the clamping piece can be conveniently detached. The clamping mechanism is extruded in the direction close to the container body, so that the second clamping block is clamped in the first clamping groove, supporting is provided for the first clamping block, the first clamping block is prevented from deforming, and therefore the clamping piece is prevented from falling off.

The utility model discloses a motor power cable assembly, which belongs to the technical field of cable equipment, and comprises a motor main body and a repeater, the back surface of the motor main body is fixedly connected with a connecting cable, and the two sides of the repeater are provided with connecting grooves. One end of the connecting cable is fixedly connected with a connecting groove, the other end of the connecting cable is fixedly connected with a first connecting plug matched with the connecting groove, the two sides of the upper surface of the repeater are fixedly connected with fixing frames, the upper surface of the first connecting plug is fixedly connected with a clamping assembly, and the lower surface of the repeater is fixedly connected with a connecting plate. According to the utility model, through the arrangement of the clamping assembly, connection loosening or falling caused by vibration or external force impact is effectively prevented, the stability and reliability of the system are improved, the maintenance difficulty and cost are reduced, through the arrangement of the fixing assembly, the cable is prevented from being damaged due to pulling or bending in the long-term use process, and the service life of the cable is prolonged. And the anti-interference capability and the service life of the cable are improved.

The cobblestone paving equipment for landscaping construction comprises a fixing plate and a transverse air cylinder, the transverse air cylinder is installed on the fixing plate, the extending end of the transverse air cylinder is connected to external mobile equipment, and an adjusting mechanism is arranged on the fixing plate. The adjusting mechanism comprises a pushing plate, a rotating mechanism, a handle, a fixing rod, a pushing spring, a fixing sleeve, an inserting rod, a pushing sleeve and a clamping mechanism, the pushing plate is rotationally connected to the fixing plate, the rotating mechanism is connected to the fixing plate and the pushing plate in a matched mode, and the adjusting mechanism can achieve accurate fixing and positioning of the pushing spring. The design of a push plate, a rotating mechanism, a handle, a fixing rod and a push spring ensures the flexibility and stability in the adjusting process, the design of a fixing sleeve, an inserting rod, a push sleeve and a clamping mechanism improves the convenience and accuracy in the adjusting process, and the design improves the adjusting efficiency; and the adaptability and the using effect of the cobblestone paving equipment for landscaping construction are guaranteed.

The invention provides a split mounting type combined threading plate, belongs to the technical field of machinery, and solves the problem that an existing threading plate is poor in use effect. The assembly type combined threading plate comprises a base plate which is provided with a plurality of installation grooves, one end of the base plate is provided with a threading pipe, and a steel wire is arranged in the threading pipe in a penetrating mode; the number of the needle plates is multiple, the needle plates are embedded in the corresponding installation grooves, a main clamping block is connected between every two adjacent needle plates in a clamped mode, a row of threading needles are arranged on the tops of the needle plates, threading holes are formed in the tops of the threading needles, the threading holes are coaxially formed, and the steel wire can sequentially penetrate through the threading holes along the threading pipe. The method has the advantage of being good in use effect.

The invention relates to the technical field of aluminum alloy handrail production, in particular to a die-casting forming device for aluminum alloy handrail production. Comprising a driving mechanism, a heat conduction mechanism and a demolding cooling mechanism, the heat conduction mechanism is arranged on the upper surface of the driving mechanism, the demolding cooling mechanism is installed on one side of the surface of the heat conduction mechanism, the driving mechanism comprises a movable mold and a fixed mold, a movable mold cavity is formed in the surface of the movable mold, and a pouring gate is formed in the center of the surface of the fixed mold; the exhaust grooves are formed in the two sides of the surface of the movable mold, one side of the surface of each exhaust groove is sleeved with an exhaust pipe, one side of the surface of each exhaust pipe is sleeved with a cooling pipe, the demolding cooling mechanism comprises an air guide pipe, and air pumps are connected to the two sides of the surface of each air guide pipe. The high-pressure gas is sucked out of the movable mold cavity, so that the mold is better cooled, the risk of thermal fatigue is reduced, the service time of the mold is prolonged, meanwhile, the high-pressure gas is sucked out, the air hole defect is reduced, the mechanical property of a product can be improved, and the product is firmer and more durable.

The utility model provides a valve device and a coil device and belongs to the technical field of thermal management, the valve device comprises a coil component, a valve body and a connecting piece, the connecting piece is fixedly connected with the coil component, the valve body comprises a first stop part and a second stop part, an installation gap is arranged between the first stop part and the second stop part, the connecting piece comprises a first connecting part, and the first connecting part is fixedly connected with the valve body. The first connecting part comprises a second clamping part and a limiting part, the second clamping part is located at the end, away from the coil component, of the limiting part, at least part of the limiting part is located in the mounting gap, one side of the limiting part in the thickness direction abuts against the first stopping part, and the other side of the limiting part in the thickness direction abuts against the second stopping part; and the second clamping part is clamped with at least one of the first stopping part and the second stopping part. Due to the fact that the two sides of the limiting part abut against the valve body, the friction force between the limiting part and the valve body is increased, the connecting piece and the valve body are clamped more tightly, and the coil component and the valve body are not prone to loosening.

The utility model discloses a kind of mill jar fixing devices of ball mill, belong to ball mill technical field.A kind of mill jar fixing device of ball mill, the inner cavity of the ball mill body is equipped with several mill jar seats, the outer periphery of several mill jar seats is respectively equipped with a pair of connecting seat, the upper surface of a pair of connecting seat is respectively equipped with fixed plate, the opposite side of a pair of fixed plate is respectively equipped with toothed plate, pressure plate is installed between a pair of fixed plate, the both ends of pressure plate are respectively provided with cavity structure, the inner of cavity structure is equipped with clamping block, by using the clamping structure of toothed plate and clamping block, the utility model realizes the quick, stable fixing of mill jar, the addition of reset spring makes that clamping block can be automatically reset under external force, keep and toothed plate tight clamping, to greatly improve the reliability and stability of fixed, simultaneously, under the action of centrifugal force, the connection of clamping block and toothed plate becomes more firm, effectively prevent that mill jar is loose or displacement when high-speed operation.

The utility model discloses a kind of razor with lubricating strip, comprising: blade, including the blade edge of multiple groups of parallel arrangement;Head cover, the head cover is annular structure;Two lubricating strips, the lubricating strip includes lubricating end and two clamping ends, the clamping end is fixed in the bottom of the lubricating end, the lubricating end is strip-shaped, the clamping end is equal in length with the lubricating end, and it is arranged in two columns along the width direction of the lubricating end;Blade holder, including blade slot, first clamping slot, and two second clamping slots, the blade slot is used to accommodate the blade, the head cover can be clamped in the first clamping slot, by the cooperation of head cover and first clamping slot, the blade is fixed on the blade holder;The second clamping slot is used for fixing the lubricating strip, two the second clamping slot is respectively arranged at two ends of the blade slot, and the second clamping slot includes two rows of groove body, and each column of the groove body can accommodate one clamping end respectively.

The utility model relates to feed processing technical field provides a kind of solid mixed feed additive feeding device, including mixing box, the solid mixed feed additive feeding device further includes: fixed ring, set in the top of the mixing box;In the utility model, by setting the groove and the cooperation of sliding block, make filter plate can be moved flexibly, adapt to different feeding scene needs, heating jacket and shell joint closely, cooperate heating tube can efficiently transfer heat, prevent additive hygroscopic agglomeration, guarantee smooth feeding, in the joint part, fixed block and connecting cylinder are elastic member, and the clamping block provides stable support, and elastic member drives clamping block to realize filter plate fast positioning, pull rope linkage structure can be conveniently released joint, different filter plate is replaced conveniently, to adapt to the powder of different granularity, accurately control feed quantity, cleaning piece can clean filter plate in time, avoid residual blockage, overall structure improves the flexibility, stability and feeding efficiency of device, guarantee additive feeding quality.

The utility model belongs to the technical field of computer accessories, particularly relates to a novel structure of a CPU (central processing unit) radiator, and aims to solve the problems that the conventional heat pipe radiator adopts a heat conduction mode to cool and radiate a CPU, the radiating efficiency is low, and certain dust is attached to the surface of the conventional heat pipe radiator in a long-term use process, so that the heat pipe radiator cannot be damaged. According to the technical scheme, the heat dissipation device comprises a bottom plate, a contact plate is fixedly installed at the bottom of the bottom plate, and a conduction column is fixedly installed at the top of the contact plate. When a CPU works, heat generated by the CPU can be stably output, so that cooling and heat dissipation can be conducted on the CPU, and the service life of the CPU is prolonged. And air can be blown to the heat dissipation fins by starting the multiple fans, so that heat conducted to the heat dissipation fins can be quickly blown away, it can be guaranteed that the heat dissipation fins have the continuous heat absorption capacity, and stable cooling and heat dissipation can be conducted on the CPU.

The utility model discloses a beam end lifting support device, including mounting seat and bottom plate, the mounting seat sets up in the upper portion of bottom plate, the middle of mounting seat upper end is fixed with hydraulic cylinder, both ends in the mounting seat interior all are provided with the adjusting bin, and the both ends between adjusting bin rotatable connection has screw rod, the middle in the mounting seat interior is provided with the protection bin, and the inside fixed motor of protection bin, and the output of motor is connected with the drive end fixed connection of screw rod, the screw rod is screwed with threaded seat, and the lower extreme of threaded seat is provided with the insert block, the lower extreme of adjusting bin is provided with the guide slot, and the upper end slip connection of guide slot and insert block, the both ends of bottom plate upper part all are provided with the let -by -slot, and the one end of let -by -slot is provided with the slot, and the slot is connected with the insert block. The utility model is easy to maintain and check to hydraulic cylinder, and the stability is good.

The utility model discloses a grating lens fixing support, which comprises a support body, a mounting hole arranged on the support body and used for assembling a grating lens, and fixing structures arranged on two side walls of the support body. According to the utility model, through the above design, loosening between the grating lens fixing support and the section bar caused by a high impact vibration environment can be prevented.

The invention relates to the technical field of pressure resistance detection, and discloses a pressure resistance detection device for a petroleum pipeline, comprising a base and an auxiliary feeding mechanism arranged inside the base, wherein the auxiliary feeding mechanism comprises a toothed plate, a first toothed rod, a second threaded rod and a second toothed rod, wherein the toothed plate is slidably connected to the inside of the base; when a clamping plate moves, the toothed plate drives the first toothed rod to rotate, and the second threaded rod rotates together with the first toothed rod through the transmission of a transmission belt, and the threaded shape on the surface of the second threaded rod meshes with the second toothed rod and drives the second toothed rod to rotate, so that the support legs at both ends of the second toothed rod can adjust their rotation angles automatically as the moving direction of the clamping plate changes, so that when the support legs are laid flat, it is convenient for staff to put the petroleum pipe onto the top of the base, and when they are erected, the support legs can support and limit the petroleum pipe, and through the cooperation of the second threaded rod and the second toothed rod one-way transmission structure, it can be avoided that the support legs at both ends of the second toothed rod are subjected to excessive force.

The utility model relates to the field of fasteners, and discloses an anti-falling type fastener structure which comprises a hexagon head, a bolt column is fixedly connected to the bottom of the hexagon head, a positioning ring groove is formed in the upper portion of the periphery of the bolt column, a threaded groove is formed in the periphery of the bolt column, a sliding sleeve is connected to the periphery of the bolt column in a sliding mode, and the sliding sleeve is sleeved with the threaded groove. A fixed round block is fixedly connected to the bottom of the sliding sleeve, an elastic assembly is fixedly connected to the top end of the fixed round block, a sliding block is fixedly connected to the top end of the elastic assembly, and a threaded sleeve is fixedly connected to the bottom of the sliding block. According to the fastening piece, the bolt column, the sliding sleeve and the limiting round ball are arranged, after the bolt column enters the sliding sleeve, the limiting round ball clamps the positioning ring groove, when the bolt column moves outwards, the sliding block is driven by the limiting round ball to move upwards, the limiting round ball can be clamped more tightly, and therefore the anti-disengaging performance of the fastening piece is greatly improved; and the connection is relatively stable.

The utility model relates to the technical field of oil delivery, and discloses an oil delivery butt-joint pipeline which comprises a butt-joint pipeline body and a reinforcing and protecting assembly, and the protecting and reinforcing assembly is arranged at a connecting port of the butt-joint pipeline body. According to the petroleum conveying butt joint pipeline, through the design of the reinforcing protection assembly, the stability and safety of pipeline connection are remarkably improved. Due to the arrangement of the connecting flanges, the connecting ports of the butt-joint pipelines can be tightly connected together, and the connecting stability is further enhanced through mutual clamping of the complementary convex blocks. And secondly, the inner wall of the protection cushion block is tightly attached to the connecting port of the butt-joint pipeline, the outer portion of the protection cushion block is connected with the two connecting flanges in a clamped mode, the connecting port of the butt-joint pipeline can be protected against damage of external factors, the sealing performance of connection can be guaranteed, and the leakage problem is prevented. In addition, a flexible fixing mechanism is formed by the design of a groove, a hole and a small sliding groove in the connecting flange, and a clamping plate, a small spring and a small sliding block which are matched with the groove, the hole and the small sliding groove.

The utility model provides an impact-resistant deep groove ball bearing structure which comprises an outer ring and an inner ring concaved in the outer ring, and a rolling assembly is arranged at the intersection of the outer ring and the inner ring; wherein a protective cover is arranged at the intersection of the outer ring and the inner ring, a buckle is arranged at the position, corresponding to the protective cover, of the inner ring, the protective cover is connected with the buckle in a clamped mode for protection, the deep groove ball bearing relates to the technical field of deep groove ball bearings, the protective cover is arranged at the intersection of the outer ring and the inner ring, and the protective cover can play a role in protecting a fixing frame at the intersection of the outer ring and the inner ring. The buckle is arranged at the intersection of the outer surface of the inner ring and the protective cover, and when the protective cover is mounted, the protective cover is clamped with the buckle, so that the intersection of the protective cover, the inner ring and the outer ring is tightly clamped, and when the deep groove ball bearing is impacted, the protective cover protects the internal fixing frame; therefore, when the protective cover slightly deforms, the problem of falling off from the joint of the protective cover and the inner ring is solved.