202results about How to "Increase the support surface" patented technology

A belt finishing device includes a finishing belt, two bearing surfaces that are spaced-apart in a running direction of the finishing belt, and a pressing device for pressing the finishing belt against a workpiece surface. The pressing device has a pressure belt that is supported on the two spaced-apart bearing surfaces. At least one of a bearing surface and the pressure belt have a profile that deviates in a width direction of the finishing belt from a straight course.

The invention discloses a hydraulic crane of an underground transfer rail. A hydraulic lifting rack is arranged in the middle of a plate frame; lateral hydraulic telescopic booms are respectively connected with the front part and the rear part of the left side and the right side of the frame; downward hydraulic telescopic booms are arranged at the outer ends of the lateral hydraulic telescopic booms; longitudinal operation wheels are connected to the lower ends; downward screw driving telescopic booms are arranged at four corners of the frame; the lower ends of the frame are connected with transverse operation wheels; longitudinal moving wheels driven by a hydraulic lever lifting mechanism are arranged below the frame; the upper ends of the downward hydraulic telescopic booms at the left and right rear parts are connected with supporting hydraulic cylinders; and the supporting hydraulic cylinders are connected with a swing hydraulic cylinder. The hydraulic crane of the underground transfer rail comprises operation wheels in the length direction and the operation wheels in the width direction, is large in operation range and high in stability of lifting operation, also comprises moving wheels, and can move on a flat car track for rail transferring without a flat car in a coal mine roadway; the swing hydraulic cylinder can enable the supporting hydraulic cylinder to be parallel to the plate frame; the hydraulic crane of the underground transfer rail is small in size and convenient to move in a narrow roadway.

The invention relates to a thread transmission type electronic expansion valve, and belongs to valves. An existing electronic expansion valve is large in running noise, and abrasion or clamping of a magnetic steel sleeve is prone to occurrence; the thread transmission type electronic expansion valve is characterized in that a backward step end face leaning shoulder is arranged on the outer circle face of a front base sleeve, the opening end of a back base sleeve is in butt joint with the step end face leaning shoulder in a fixedly welding manner to form a straight-cylinder-shaped shell with two ends closed, a front section of a nut sleeve is inserted into an inner cavity wall of the front base sleeve, and an end face leaning shoulder on the inner cavity wall and an inward turning edge of the opening end of the front base sleeve are used for limiting and fixing; a valve is installed in a hollow inner cavity of a valve rod sleeve fixed to the magnetic steel sleeve in a penetrating manner, the back end of the valve extends out of the back end of the magnetic steel sleeve, and a spacer bush and a spring arranged outside the valve rod in a sleeving manner are used for back stroke limiting; and the valve rod sleeve is matched with inner threads in an axial through hole of the nut sleeve through outer threads to drive the valve rod to move, a buffer connecting piece connected with the front end of the valve rod is arranged on the front section of the axial through hole of the nut sleeve to conduct guide supporting on the valve rod, circumferential limiting protrusions and limiting leaning shoulders which are matched with each other are arranged for front stroke limiting, and the collision noise and friction are reduced.

The invention relates to a full automatic window punching device for a radial bearing cage. The window punching device comprises a feeding component, a conveying component and a punching die fixation component which are arranged on a frame, and also comprises an apex equal-division driving component and a window punching positioning component, wherein the window punching positioning component comprises a positioning cylinder, a processing positioning sleeve, a positioning slide rail and a positioning slide block, the processing positioning sleeve is connected with the positioning slide block by a positioning connection block and sleeved on a punching die, so as to greatly increase the production efficiency, reduce the production cost and fully automatically accomplish conveying, window punching and blanking steps. The apex equal-division driving component comprises an apex cylinder, an apex tie rod, an apex slide rail, a servo motor, a speed reducer, a bearing seat, an apex axle and an apex, wherein the servo motor is in transmission link with the apex by the speed reducer and the apex axle, the apex is driven to rotate, the workpiece is driven to perform the equal-division rotation; during the workpiece window punching process, the uniform equal-division is ensured, the angle is adjustable, the division is conveniently used, and the quality of the cage window punching is greatly improved.

A palletized shipping container for bulk handling of fluid materials has a rigid box-like outer shell within which is positioned a flexible bag and an intermediate corrugated liner sandwiched between the walls of the bag and shell. The bag has flap-like extensions at an upper end attached to the walls of the shell to maintain the bag in an erect uncollapsed configuration, a non-removable bung at its top end, and a non-removable discharge valve adjacent its bottom end. The bung is releasably retained at the top of the liner to maintain the bung in a proper position and prevent sagging of the bag. An inwardly and downwardly angled cushioned surface at the bottom of the shell supports the liner and bag, provides additional cushioning, facilitates emptying of the bag, and reduction of residual material. The pallet allows 4-sided entry of fork lift forks.

The invention discloses a method for preparing high-density concrete with a uniform aggregate and an aggregate thereof, and particularly relates to a method for preparing high-density concrete, belonging to the technical field of concrete preparation. The method is characterized in that the disturbance area of a slurry caused by subsidence trend of an iron aggregate or a lead aggregate is larger than or equal to the equivalent area of the aggregate; a mixture hand sample is produced on an experiment table according to the calculated mix proportion before the mixture is tried; the subsidence condition of the iron aggregate or the lead aggregate is detected, and the detection data is recorded; and the concrete is poured in a split level when being poured in a layered mode. By adopting the method and the aggregate, the uniform distribution rate of the aggregates is improved, and the ray-preventing capability of projects is more uniform.

The invention discloses a seat and a leg support mechanism. The leg support mechanism comprises a drive assembly, a leg support assembly and a connecting beam assembly. The drive assembly is mounted on a fixed support. The leg support assembly comprises a first leg support component and a second leg support component. The first leg support component is provided with a hole type or groove type sliding fit portion, the second leg support component is in sliding connection with the first leg support component in the extending direction of the sliding fit portion, and a first hinged point is formed at the upper end of the first leg support component. The connecting beam assembly comprises a power input portion and a power output portion, the power input portion is connected with a drive portion of the drive assembly, and the power output portion is connected with the second leg support component. When the drive assembly is started, the power output portion can drive the first leg support component to rotate relative to the first hinged point, so that the leg support assembly is switched between a folded state and a stretching-out state. In the stretching-out state, the second leg support component stretches out relative to the first leg support component; and in the folded state, the second leg support component retracts relative to the first leg support component.

The invention discloses an adjustable ladle fixing device, which comprises a fixed frame, a support bar and an adjustable screw. The adjustable ladle fixing device is characterized in that a holding end and at least two groups of installation holes are arranged on the fixed frame, each installation hole comprises a barrel-shaped outer wall fixed on the fixed frame and a limiting wall provided with a through hole and fixed at the outer end of the barrel-shaped outer wall, a long hole for the adjustable screw to penetrate is further arranged on the limiting wall with the through hole, and a thread hole matched with the adjustable screw is arranged on the support bar which is fixed in the installation holes of the fixed frame through the adjustable screw. The adjustable ladle fixing device adopts the screw to control support ends to radially move along a ladle frame, can rapidly change support diameter, can adapt to ladles in different standards, and enlarges operation scope.