31results about How to "Small starting force" patented technology

The invention relates to a hydraulic variable-diameter centralizer used for convention oil gas well drilling and solid mineral resource well drilling, and the hydraulic variable-diameter centralizer solves the problems that an underground variable-diameter centralizer is large in starting force and short in installation distance. According to the technical scheme, sliding blocks penetrate through lower cylindrical body through grooves and are embedded into inner central tube annular grooves, an outer central tube is arranged in a revolving cylindrical body in a sleeved mode, protrusive splines outside the outer central tube are embedded into spiral grooves in the revolving cylinder body, a spring c is arranged outside the outer central tube in a sleeved mode, an upper cylindrical body is in threaded connection with a lower cylindrical body, a spring b is arranged outside the upper cylindrical body in a sleeved mode, and a sliding sleeve is arranged in the upper cylindrical body in a sleeved mode. A centralizing arm a is hinged to the triangular prism surface of the sliding sleeve, a centralizing arm b is hinged to the triangular prism surface of the lower cylindrical body and hinged to the centralizing arm a, a locking cylinder is placed in an upper cylindrical body through hole, a spring a is put in the locking cylinder, and a press plate and the upper cylindrical body are fixed through screws a. The hydraulic variable-diameter centralizer converts axial motion of the inner central tube and the outer central tube into circumferential direction rotation of the revolving cylindrical body, converts axial thrust generated by hydraulic pressure into circumferential direction centralizing force, and is reliable in supporting and large in installation distance.

The invention relates to an upturning and folding barrel cover device, which comprises a barrel cover seat ring with a material feeding through hole. The device is characterized in than an opening of the barrel cover seat ring is provided with a folding cover plate which is formed by the articulation between a front cover and a back cover, the two sides at the front of the front cover are provided with matching parts which are restrained to run on tracks at the two sides of the seat ring, and a rotation part which is connected with the back side part of the back cover is arranged at the back side of the seat ring to control the back cover to be upward and downward overturned. The device can open and close the barrel cover, has smaller power for opening the cover, and does not occupy more space at the left part, the right part and the upper part of the barrel. The device is reasonable in design, energy-saving, and hard to break.

The invention discloses a labor-saving linkage positioning and locking structure, and belongs to the technical field of positioning of machining equipment. The labor-saving linkage positioning and locking structure comprises a connecting rod, clamping jaws, screw rods, a frame, cross universal joints, a guide rail, a locking mechanism, a spring support base, a positioning groove and a steel plate spring, wherein the guide rail is horizontally mounted on the frame; the positioning groove is formed in the guide rail; the spring support base is arranged on the side surface of the frame, and is provided with the steel plate spring; the steel plate spring is parallel to the guide rail; the connecting rod is perpendicular to the guide rail, and is horizontally arranged below the guide rail; the screw rods are respectively connected to the two ends of the connecting rod; the cross universal joints are respectively arranged between the connecting rod and the screw rods; the clamping jaws are respectively matched and mounted on the screw rods at the two ends of the connecting rod; and the tail end of one screw rod is fixedly connected to the locking mechanism. Through the positioning of rollers and the linkage of the clamping jaws, mechanical loads with the rollers achieve a quick, stable and reliable positioning and locking effect on the guide rail for a long time; and the starting force in renewed starting is comparatively low and no scratches of the guide rail may be caused.

The invention relates to a power tool which comprises a shell, an output shaft, a fixing member for pressing a working head onto the output shaft, a locking assembly for locking the fixing member and a driving mechanism, wherein the locking assembly comprises a sleeve fixed in the output shaft, a first clamping member and a second clamping member contained in the sleeve, as well as a rotation shaft arranged between the first clamping member and the second clamping member; the first clamping member and the second clamping member can rotate by taking the rotation shaft as the center, so that the locking assembly is located at a locking position or a release position; a locking member for keeping the locking assembly at the locking position and a first elastic member for elastically supporting the locking member are further arranged between the first clamping member and the second clamping member; the driving mechanism comprises a push rod which is arranged in the output shaft and can move along the output shaft axially; the push rod can push the locking member to move when movement, so as to release restriction on the locking assembly. With adoption of the power tool, the detachment process can be completed conveniently through simple pressing action, without rotating a wrench for multiple turns; the starting force is small.

The invention discloses quantitative discharging type fermentation equipment and a fermentation method thereof. The quantitative discharging type fermentation equipment comprises a barrel, a spiral conveying shaft, a driving device, a heating device and a material receiving bin, wherein the barrel is provided with a feeding port and a discharging port which are located in the two ends; the spiralconveying shaft is arranged in the barrel body in the axis direction of the barrel body in a self-rotating mode; the driving device drives the spiral conveyor to rotate; the heating device is positioned on the barrel body; and the material receiving bin is arranged at the discharge port, a weighing sensor is integrated on a bottom plate of the material receiving bin, and the bottom plate of the material receiving bin can be opened and closed. According to the scheme, spiral horizontal conveying is adopted; forward movement and backward movement of materials can be realized; the standing time of the materials is controlled; the materials are turned over; the barrel body does not need an outlet capable of being automatically opened and closed, the internal structure is greatly simplified, the material receiving bin integrated with weighing equipment is arranged at the discharging port, a bottom plate of the material receiving bin can be opened, online quantitative discharging is effectively achieved, quantitative packaging is easy, and compared with the prior art, a feasible automatic weighing and discharging mode is provided.

The invention provides an elbow-type dual-thrust hydraulic centralizer. The elbow-type dual-thrust hydraulic centralizer comprises a hydraulic thrust system and a centering system, wherein the hydraulic thrust system comprises a main body, hydraulic cylinders and a retaining system; the hydraulic cylinders are arranged on the main body; a piston is arranged in each hydraulic cylinder; the hydraulic cylinders and the pistons act on the centering system through in-pipe pressure building to realize centering; the retaining system can realize permanent centering after in-pipe pressure relief; the centering system comprises a push ring, a positioning block and at least four groups of elbows uniformly distributed on the circumference of the main body; the push ring is connected with the pistons; the positioning block is fixed to the middle of the main body; one end of each elbow is fixed on the push ring, and the other end of each elbow is fixed on the positioning block; an included angle is formed between each elbow and the main body; and the centering system can be started up by an extremely small starting force. The bidirectional hydraulic system ensures no axial displacement of the centering system; owing to the unique pre-bending structural design, the starting force of the centering system becomes smaller; and the elbow-type dual-thrust hydraulic centralizer is suitable for centering casings of both horizontal wells and highly-deviated wells.

The invention provides a quick coupling for fluid loading and unloading. The quick coupling comprises a valve, a fixed inner ring, a guide inner ring, an outer ring, a nut flange and a hand wheel, wherein the valve is arranged in the guide inner ring, the guide inner ring is connected with the fixed inner ring, and the outer ring and the hand wheel are respectively connected with the nut flange; the rear end of the valve is of a screw structure, and thread is arranged in the nut flange and matched with a thread on the screw structure; guide holes are formed in the edge of the end surface of the fixed inner ring, or guide holes are correspondingly formed in the edge of the end surface of the fixed inner ring and the edge of the end surface of the guide inner ring; an interlocking limiting guide rod is arranged in each guide hole; a guide centre is fixed to the rear end of each interlocking limiting guide rod, a spiral groove is formed in the outer surface of the outer ring, and the guide centres are located in the spiral groove; the thread of the spiral groove is opposite to the thread of the screw structure in rotating direction; a sliding-moving device is fixed to the valve and can drive the valve to slide in the guide inner ring along the axis. and a limiting structure is arranged on the fixed inner ring. The quick coupling has the advantages that a tank car does not need tobe transformed, and operation is easy.

The invention discloses a damping type gas spring. The damping type gas spring. comprises a cylinder barrel and a piston rod arranged on the cylinder barrel in a telescopic mode, the piston rod is provided with a piston assembly, the piston assembly comprises a piston framework, a rectangular ring, a bowl-shaped ring, a piston flat gasket and a piston fancy gasket, and the piston framework is fixedly installed on the piston rod; the rectangular ring and the bowl-shaped ring are both arranged on the piston framework in a sleeving mode, the piston flat gasket abuts against the rectangular ring for limiting, the piston fancy gasket abuts against the bowl-shaped ring for limiting, and the outer side wall of the bowl-shaped ring is arranged to be a cylindrical surface; and a long-strip-shaped thin groove is formed in the inner wall of the cylinder barrel in the axial direction of the cylinder barrel, and air in the cylinder barrel circulates through the thin groove. The damping type gas spring has the following advantages and effects that a new mechanical structure is utilized for the scheme, the mode that the single bowl-shaped ring is matched with the rectangular ring is adopted, friction resistance with the inner wall of the cylinder barrel during movement can be reduced to a certain extent, accordingly, large static locking force is prevented from being generated during starting, the outward expansion degree of the bowl-shaped ring can be reduced through the cylindrical surface, and elastic restoring force is reduced, so that starting force is reduced, and starting is more convenient.

The invention discloses a driven gyro which comprises a gyro body and a screw rod, a touchdown rotating head is arranged at the bottom of the gyro body, a boss is arranged at the upper end of the gyro body, an opening matched with the screw rod is arranged in the boss, the cross section of the opening is rectangular, and the screw rod is inserted into the opening and capable of moving up and down along the opening to drive the gyro body to rotate. The driven gyro in the scheme is simple in structure and only needs to be placed on the ground or on other table tops when played, and a hand holds the screw rod to apply downward action force and the screw rod moves downwards in the opening so as to drive the gyro to rotate. The driven gyro is extremely simple to operate, small in starting force, long in continuous rotation time and particularly suitable for children to play.

The invention relates to a bolting device having two bolts which are held rotationally secure and coupled to each other via a spindle element, wherein: a first bolt is connected via a threaded engagement to a corresponding thread of the spindle element; rotating the spindle element about its central longitudinal axis causes the first bolt to move along the longitudinal axis; and a second bolt is rotationally mounted on the spindle element in a fixed axial position. The invention also relates to a crane jib head comprising such a bolting device, for bolting a lattice masthead to a head adaptor.

The invention discloses a variable-inertia spring flywheel capable of automatically regulating the rotational inertia. The variable-inertia spring flywheel comprises a flywheel shaft, a fixed disc, flywheel plates and a connecting spring; the fixed disc is coaxially and fixedly connected with the flywheel shaft; at least two flywheel plates are uniformly distributed in the circumferential direction of the fixed disc; the flywheel plates are slidably connected with the fixed disc in the radial direction; and the two ends of the connecting spring are correspondingly fixedly connected with the adjacent flywheel plates. The flywheel disclosed by the invention is simple to mount, dismount and transfer; when at a low speed, the flywheel plates are difficult to move out due to limitation of the connecting spring so as to maintain a relatively low rotational inertia; when at a high speed, the flywheel plates move out because the limitation of the connecting spring is overcame by the centrifugal force so as to obtain a relatively high rotational inertia; the flywheel has the characteristics of small start force and high energy storage; each independently moving flywheel can realize automatic regulation by automatically sensing the quality unevenness of the flywheel and the torque fluctuation of an input end and an output end, and thus abnormal vibration and torque fluctuation are reduced.