202results about How to "Good anti-loose effect" patented technology

The invention relates to a connecting structure capable of being rapidly mounted and dismounted. The connecting structure comprises a locking pin and a locking block. The locking pin comprises a pin shaft and a pin shaft sleeve arranged on the lower portion of the pin shaft in a sleeving mode through threads. The bottom surface of the pin shaft is a conical surface. The lower portion, under the pin shaft, of the pin shaft sleeve is provided with a plurality of through holes evenly distributed around the axis, and a steel ball which can freely move but can not fall out is arranged in each through hole. The locking block is provided with a connecting hole and a containing cavity, the connecting hole is formed in the top surface of the locking block, and the bottom of the connecting hole is communicated with the top of the containing cavity, and the top surface of the containing cavity is a conical surface. In the installation process, the pin shaft sleeve and the locking block are fixed to a connector and a connected part respectively, the pin shaft sleeve penetrates through the connector and enters the containing cavity of the locking block through the connecting hole, the pin shaft is rotated downwards so that the steel balls can be pushed to squeeze the conical top surface of the containing cavity through the conical bottom surface of the pin shaft, and the connector and the connected part squeeze and fix each other when subjected to force in opposite directions. In the dismounting process, the pin shaft is rotated upwards, the steel balls are not subjected to force, and then the connector and the connected part are separated.

The invention provides a stable lock bolt, and belongs to the field of mechanical fasteners. The stable lock bolt solves the problem that an existing bolt is poor in loosening preventing effect. The stable lock bolt comprises a bolt head and a bolt rod, wherein the bolt head is in a round head shape, and a pressing hole is formed in the bolt head and the bolt rod. A pressing rod penetrating through the pressing hole is further included. An adjusting cap is further included and comprises an adjusting plate fixed to the top end of the pressing rod and an adjusting sleeve fixed to the outer edgeof the adjusting plate, wherein the adjusting sleeve sleeves the bolt head, and a pressing block is fixed to the bottom end of the pressing rod. An expansion gasket sleeving the pressing rod is further included. The hole wall of the pressing hole is provided with a limiting groove. The rod wall of the pressing rod is provided with a limiting block which is located in the limiting groove in a sliding manner. The distance between the middle portion of the limiting groove and the top end of the pressing hole is smaller than the distance between the two ends of the limiting groove and the bottom end of the pressing hole, the distance between the front end of the limiting groove and the top end of the pressing hole is larger than the distance between the rear end of the limiting groove and thetop end of the pressing hole, smooth transition is achieved from the middle portion of the limiting groove to the two ends of the limiting groove, and an elastic reset mechanism is arranged between the pressing rod and the bolt rod. The bolt is better in loosening preventing effect.

The invention relates to the field of sealing parts, in particular to a waterproof-sealing electrical connector assembly. The waterproof-sealing electrical connector assembly comprises a plug and a socket; a sealing rubber ring arranged on a plug shell comprises a radial sealing part and an end face sealing part which are formed in the front and at the back; the radial sealing part and the end face sealing part form a step shaft sleeve structure; one side, which is close to the radial sealing part, of the end face sealing part forms a step face facing the front together with the radial sealing part; the step face is provided with a sealing face for being in seal fit with the front end face of a socket shell; a sealing face for being attached and sealed with a sealing retaining edge is formed on the rear lateral surface of the end face sealing part; a sealing convex rib for being in seal fit with the inner wall surface of the socket shell is arranged on the outer peripheral surface of the radial sealing part; the sealing convex rib is connected end to end around the axis of the radial sealing part to form a closed loop. The electrical connector assembly solves the problem of poor waterproof-sealing performance of an existing electrical connector assembly.

The present invention belongs to the technical field of laser machining equipment, and particularly relates to a laser cutting head follow-up device. The laser cutting head follow-up device comprises a stepping motor, a coupling, a bearing seat I, a shaft end support I, a rolling bearing I, a nut seat, a ball screw nut, a ball screw, a rolling bearing II, a shaft end support II, a bearing seat II, a sleeve and a nozzle. The laser cutting head follow-up device has the advantages that a guide rail is reduced, the ball screw simultaneously has the effects of transmission and guiding, a half-arc groove milled on the excircle of the nut is matched with a cylindrical pin and has good anti-loose effect, capacitive sensing is adopted, the rotation of the stepping motor is controlled through electric signals, the distance between the laser nozzle and the surface of a cut work piece can be automatically adjusted, automatic focusing is always performed, work pieces are artistic, uniformly cut and formed, and have no burrs, and the cutting quality and the cutting efficiency are greatly improved.

The invention belongs to metallurgical equipment fasteners, and particularly relates to a novel locking fastener applicable to a straightener system. The novel locking fastener at least comprises a screw rod (1) and a nut (3), and is characterized in that when the screw rod (1) and the nut (3) are screwed together, the bottom end of the nut (3) is fixedly connected with a pressure cover (5) through a locking screw (6), and the head of the pressure cover (5) is screwed in the screw rod (1) in a threaded way. The novel locking fastener has the advantages of being good in locking effect and easy to process and implement, and ensuring that a user can easily observe whether the thread is loosened.

The invention discloses a gas extraction device in a coal mining area. By setting a high frequency oscillator, the gas can be completely extracted and the gas flow can be promoted. In the process of gas extraction, a plugging assembly is firstly used to mount and position an extraction pipe and after well plugging, good sealing performance is ensured; later, an extraction pump is used, a control valve is controlled, the gas is firstly extracted, after the gas is extracted to a certain degree at an extraction hole, the high frequency oscillator is used to oscillate, and after a certain period of continuous extraction, a pulse aeration module is opened again, a protective gas is impulsively injected into a coal seam, after certain pressure arrives in the borehole in a certain time of pulse aeration, the gas in the borehole is continuously extracted, and thus, the high frequency oscillator is used to promote circulation of the gas, the extraction effects are ensured, the remaining small part of gas is subjected to exchange and circulation by using a pulse aeration mode, and the gas is completely extracted.

The invention discloses a double-rod bolt, which includes an outer bolt and an inner bolt. The outer bolt includes an outer bolt head of an integral structure and an outer bolt rod provided with an outer thread extending to the end. The through shaft hole of the bolt head and the outer bolt shank, the inner bolt includes an inner bolt head and an inner bolt shank, the diameter of the inner bolt head is larger than the diameter of the through shaft hole, and the inner bolt shank is connected from the port at one end of the outer bolt head It is inserted into the through shaft hole and its end passes through the end of the outer bolt rod, and the end of the inner bolt rod is provided with a first external thread; by adding an inner bolt through the outer bolt to further lock with the screw, the tight When in use, the two are restrained by each other, so it is not easy to loosen, thereby improving the anti-loosening effect.

The invention discloses a lock washer manufacturing method and a lock washer. The manufacturing method comprises the following steps that (1), the lock washer which is made of stainless steel and has a tooth structure is manufactured, wherein the tooth structure is that the included angle between a long edge and a short edge of the cross section of a small tooth is 80-110 degrees, the depth of the small tooth is 0.1-0.3 millimeter, the included angle between the long edge of the cross section of the small tooth and the base plane of the washer is 5-10 degrees, and the included angle A between the long edge of the cross section of a large tooth and the base plane of the lock washer is larger than the lead angle B of a matched bolt or nut by 0.1-1 degree; (2), the surface of the lock washer is processed, and a passivated layer on the surface of the lock washer is removed; (3), the lock washer after processing of the step (2) is subjected to low-temperature carburization, or low-temperature nitridation or low-temperature nitrocarburizing, and a hardened layer is formed on the surface of the lock washer; (4), the finished lock washer is finally manufactured after washing. The lock washer manufactured through the manufacturing method is good in lock effect and low in manufacturing cost.

The invention relates to a magnetic force anti-vibration loosing-proof bolt and nut that includes magnetic guiding bolt and magnetic nut that is formed by a flute nut and a permanent magnet. When the nut screwing on the bolt, the permanent magnet would generate magnetic attraction to the bolt to make the nut and the bolt joint together, if the fasten material is magnetizer, the nut would joint with it tightly. And the nut, the bolt and the fasten material would be joint together, and sharply increase the fastening strength and loosing defend ability. The invention has good anti-vibration loosing-proof ability, simple structure and is material saving.

The invention discloses an elastic washer, which is n-shaped as a whole and includes an integrally formed body and an outwardly curved elastic cantilever. After the elastic washer is placed between the connecting devices, the elastic cantilever is pressed close to the body of the elastic washer. When there is a gap between the connecting devices due to looseness, the elastic cantilever will rebound and resist one of the matching connecting devices to prevent the connecting devices from loosening.

The invention relates to a bundled conductor supporting armor clamp. The armor clamp comprises a connecting base plate fixedly connected to a supporting insulator, a direction corresponding to an extension direction of a bundled conductor is defined as an installation direction, the connecting base plate is provided with at least two spacer installing plates which are distributed separately along the installation direction successively, each spacer installing plate is provided with a spacer in the side surface vertical to the installation direction, each spacer includes lead clamps arranged along the circumferential direction of the spacer, and the number of the lead clamps of each spacer is the same with that of the other spacers. Separate distribution of the bundled conductor is realized, and the bundled conductor is supported so that the bundled conductor is prevented from downward swinging due to the deadweight. The connecting base plate is provided with at least two spacer installing plates which are distributed separately, multi-point support for the bundled conductor is formed, stress concentration in the bundled conductor is alleviated effectively, bearing of the bundled conductor is optimized, and the power transmission stability and reliability of the bundled conductor are improved.

The invention provides a workpiece clamping device, and belongs to the technical field of machining. The workpiece clamping device comprises a clamping assembly and a limiting assembly. The lower end of a rocker of the clamping assembly is hinged to a rocker supporting base, and the upper end of the rocker and the lower end of a connecting rod are hinged through a first hinge pin. A bent press plate is hinged to a press plate supporting base through a second hinge pin, one end of the bent press plate and the upper end of the connecting rod are hinged, and a press cushion is arranged on the lower side of the other end of the bent press plate. One end of a piston rod of a driving cylinder and the first hinge pin are hinged. A left supporting plate and a right supporting plate of the limiting assembly are symmetrically arranged on the two sides of a machine frame. A left stop screw penetrates through the left supporting plate, and a first supporting nut and a first locking nut are in threaded connection with the left stop screw. A right stop screw penetrates through the right supporting plate, and a second supporting nut and a second locking nut are in threaded connection with the right stop screw. The workpiece clamping device has a good clamping effect on workpieces, effectively prevents the workpieces from moving in the machining process, and is reasonable in structure and low in cost.

The invention discloses a flange nut loose-proof sleeve. The technical essential scheme is as follows: a connecting sleeve (2) is at least fixedly connected with two nut sleeves (1); the nut sleeves (1) are sleeved in the nuts of bolts on a corresponding flange; and the connecting sleeve (2) is fixed on a fixing device (6) on a flange outer side surface(4).

The invention provides an anti-loosening connecting bolt. The anti-loosening connecting bolt comprises a bolt and a nut which are connected with a joint surface part, wherein at least one V-shaped groove is formed in the joint end surface of the nut and the joint surface part; a metal stop elastic sheet is arranged between the nut and the joint surface part; a stop boss is arranged on one side, incontact with the joint surface part, of the metal stop elastic sheet; a groove matched with the stop boss is formed in the joint surface part; a stop sheet is arranged on one side, in contact with the nut, of the metal stop elastic sheet; and after the nut is fastened and is in a proper position, the metal stop elastic sheet can be meshed with the V-shaped groove in the nut under the action of elastic force, so that the anti-loosening and stop effects are achieved. The anti-loosening connecting bolt has the characteristics of reasonable and feasible structure, reliable anti-loosening effect,wide application range, easiness in manufacturing, convenience in mounting, capability of being repeatedly dismounted and used and long service life.

The invention provides a combined locknut capable of being prevented from automatically unlocking on a bolt. The combined locknut comprises a fastening nut, a lock washer, a spring washer and a compressing nut. The combined locknut is characterized in that a limiting groove is formed in the fastening nut; a locking lug and a returning stopping lug are arranged on the lock washer; anti-slip teeth are arranged on the compressing nut. According to the combined locknut, a workpiece on the bolt is fastened through the fastening nut; then the bolt is sleeved with the lock washer and the spring washer sequentially, and the locking lug on the lock washer is embedded into the limiting groove in the fastening nut; the compressing nut is screwed and compressed; the returning stopping lug on the lock washer is inserted into tooth grooves of the anti-slip teeth on the compressing nut, so that the fastened fastening nut, the lock washer, the spring washer and the compressing nut can form a fastening body; a large frictional force remains between the body and threads of the bolt all the time. Therefore, the combined locknut has a good locking effect; and in addition, the combined locknut is simple to operate, and can be repeatedly used.

The invention particularly discloses an axial flow ventilator capable of synchronously adjusting blades, and is used for solving the problems of time waste and labor waste during adjustment of mounting angles of the blades of the conventional axial flow ventilator and the problem of influence of unbalance of a blade wheel on the service life of the conventional axial flow ventilator. A push disk is sleeved on a shaft sleeve; a groove is formed on the outer cylindrical surface of the push disk; a crank is arranged in the groove; a worm wheel which is in threaded connection with the push disk is arranged on the right side of the push disk; a supporting seat and a cover plate are arranged on the outer sides of the left end face and the right end face of the worm wheel; a worm support is fixed on the supporting seat; a worm is inserted into the worm support; a balance weight rod is arranged on the other side of the worm; a driving rod is fixed at one end of the worm; the outer end of the driving rod is positioned in a supporting sleeve; a clamping slot is formed on the stair surface of the supporting sleeve; a pin shaft is inserted into a sliding chute hole of the driving rod; a sealing gasket is sleeved on the driving rod; and a spring is arranged between the sealing gasket and the pin shaft. According to the axial flow ventilator, the efficiency of adjusting the mounting angles of the blades is improved, and the consistency of the mounting angles is guaranteed; and the axial flow ventilator has the advantages of simple structure, low cost and convenience in maintenance, and is easy to mount.

The invention relates to the technical field of fasteners, in particular to a fastener with an anti-loosening function. The fastener comprises a bolt head, wherein the bottom end of the bolt head is connected with a threaded section; the upper end of the threaded section is connected with a convex ring; the threaded section is connected with a first nut; the threaded section is connected with a second nut; the bottom end of the first nut is connected with a plurality of first connecting rods; one end of each first connecting rod is connected with the second nut; the bottom end of the threadedsection is provided with a hollow sleeve in a sleeving manner; the bottom end of the outer side of the hollow sleeve is connected with a hexagonal bulge; the interior of the hollow sleeve is connectedwith a threaded rod; a threaded hole is formed in the bottom end of the threaded section; and the upper end of the hollow sleeve is connected with a supporting frame. According to the fastener, the hexagonal bulge drives the hollow sleeve to rotate, the hollow sleeve drives the threaded rod to rotate, the threaded rod is connected with the threaded hole, the hollow sleeve rotates upwards to drivethe supporting frame to move, the upper end of the supporting frame is in contact with the second nut, when the first nut is loosened, the second nut prevents the first nut from being loosened through the first connecting rods, and the anti-loosening effect is good.

A lock nut comprises an outer nut and an inner nut. A first internal thread is formed inside the inner nut. An external thread is formed in the lower end of the outer wall of the inner nut. A second internal thread is formed in the middle inside the outer nut. A third internal thread is formed in the bottom end inside the outer nut. The inner nut is installed inside the outer nut. The external thread and the second internal thread are consistent in screwing direction. The external thread and the first internal thread are opposite in screwing direction. The external thread and the third internal thread are opposite in screwing direction. The distance between a first plane at the bottom of the inner nut and a second plane below the second internal thread inside the outer nut is not smaller than the one-fold screw pitch. The lock nut has the beneficial effects that a bolt cannot loosen after the bolt is screwed down by hand and the left-hand and right-hand threads are meshed, and the anti-looseness effect is good; the structure is simple, looseness prevention can be achieved by easy nut and bolt fastening; installation is convenient; the optional bolt range is wide; when the bolt is screwed down, the bottom face of the head of the bolt and the top face of the inner nut are not in contact, and therefore the needed pretightening force is much smaller than that in the prior art.