654results about How to "Avoid uneven force" patented technology

The invention discloses a welding tool for production of an automobile seat framework. The welding tool for production of the automobile seat framework comprises a base (1), a feed clamping device, two side section clamping devices and a supporting bar clamping device, wherein the feed clamping device is provided with a sleeve (14) in advance and pushes the sleeve to the position above a slope (50) of the bottom section of a U-shaped bent pipe (2) in the automobile seat framework, the two side section clamping devices are used for fixedly clamping two side sections of the U-shaped bent pipe (2), and the supporting bar clamping device is used for fixedly clamping a first supporting bar (3) and a second supporting bar (4) so that the two ends of the first supporting bar (3) and the two ends of the second supporting bar (4) can be in fixed lap joint to the two side sections of the U-shaped bent pipe (2) correspondingly. By the adoption of the structure, the U-shaped bent pipe, the first supporting bar and the second supporting bar can be fixedly clamped, and therefore the welding tool for production of the automobile seat framework can guarantee fixed clamping of the U-shaped bent pipe and the welding precision and the product consistency of the first supporting bar and the second supporting bar during automatic welding.

The invention discloses a large-sized hollow cylindrical sampler for coarse grained soil and a use method thereof. The sampler comprises an annular sleeve and a vibrating compacter, two parts in all, wherein the annular sleeve comprises an annular base (1), an annular outer sleeve (2), an annular inner sleeve (3) and an annular extension barrel (4); and the vibrating compacter comprises a vibrating motor (7), a circular iron plate (12), a dowel bar (6), a positioner (8) and an annular iron plate (5). While using the instrument, a soil sample (9) is paved at first and then put into the annulariron plate (5); next, the vibrating motor (7) is turned on; when the edge of the annular outer sleeve (2) is level with the positioner (8), the vibrating motor (7) stops vibration and the next layer of soil sample (9) is added; and then vibration compaction is performed until the soil samples reach a predetermined height. The sampler is simple to use, convenient for operation and control, and capable of preparing a highly compact and even test sample, so that the time and labour for preparing the test sample are saved.

A shock absorber has a seat disk seated on a valve seat of a piston. A disk valve opens and closes a slot provided in the seat disk to extend in the circumferential direction thereof. In a low piston speed region, an orifice passage generates a damping force of orifice characteristics. In an intermediate piston speed region, the disk valve opens to generate a damping force of valve characteristics. In a high piston speed region, the seat disk opens to prevent an excessive increase in damping force. The disk valve partially opens the slot relative to the circumferential direction to gradually increase the flow path area, thereby preventing a sharp change in damping force in a transitional region from the low to intermediate piston speed region.

The invention relates to a high-pressure gradual change forming device for the inside of sheet, which belongs to the technical field of metal forming. The high-pressure gradual change forming device comprises an upper die assembly, a lower die assembly, a guide mechanism and a plate pressing mechanism, wherein the upper end and the lower end of the guide mechanism are respectively movably connected with the upper die assembly and the lower die assembly; the plate pressing mechanism is movably arranged on the lower die assembly and is directly opposite to the upper die assembly; and the sheet to be pressed is positioned between the upper die assembly and the plate pressing mechanism. A pressure medium is adopted for forming in the forward direction and the backward direction, the forward pressure medium in a lower hydraulic chamber has the effects that force on the sheet is balanced and the imbalanced force on the edge of a rigid convex die can be avoided; and the backward pressure medium in an upper hydraulic chamber has the effect on preventing a part of the sheet contacting a concave die to cause the part of the sheet to be seriously deformed and damaged.

The invention puts forwards an automatic precision rotary cutting machine. Before a rotary cutting device begins to perform rotary cutting, a first lifting driving device slides away from a second clamping part along a first horizontal guiding rail, a first lower telescopic supporting rod and a second lower telescopic supporting rod slide to make contact with a log in an abutting manner, the log is supported to abut against an upper driving wheel single body, a first advancing and retreating motor drives a first rotating shaft to move away from a second clamping part, a first lifting frame moves to the height, corresponding to the circle center of the log, of a first cutter, a worker rotates a first operating handle for adjustment, the first clamping arm clamps the log, a controller controls driving of a first lifting motor, the pressure applied by a first main base plate to the first lifting frame before the log is clamped is equal to the pressure after the log is clamped, the first lifting driving device slides towards the second clamping part along the first horizontal guiding rail, the first rotating shaft moves towards the second clamping part, and the first cutter is automatically aligned to the log.

The invention discloses a press-fitting production line for hub assemblies. The press-fitting production line comprises a circulatory conveying assembly and a part press-fitting mechanism; the circulatory conveying assembly comprises a support and a plurality of supporting brackets arranged on the support, and the multiple supporting brackets are used for conveying hubs on the support in a circulation mode so that the hubs can undergo the press-fitting work of each process; and the part press-fitting mechanism comprises a lower bearing outer ring pressing machine, an upper bearing outer ring pressing machine, an ABS gear ring pressing machine and a bolt pressing machine, wherein the lower bearing outer ring pressing machine, the upper bearing outer ring pressing machine, the ABS gear ring pressing machine and the bolt pressing machine are arranged along the support, the lower bearing outer ring pressing machine is used for carrying out press-fitting on lower bearing outer rings of the hubs, the upper bearing outer ring pressing machine is used for carrying out press-fitting on upper bearing outer rings of the hubs, the ABS gear ring pressing machine is used for pressing ABS gear rings on the hubs, and the bolt pressing machine is used for pressing bolts on the hubs. The press-fitting production line for the hub assemblies has the advantages of being high in automation level and safe and saving energy and is suitable for being widely popularized and used.

The invention discloses a pile splicing structure for precast piles, which comprises inner hoops (1) and outer hoops (2), wherein the inner hoops (1) are sheathed at the peripheries of two pile splicing parts required to perform pile splicing on the precast piles; the outer hoops (2) are sheathed and fastened onto the peripheries of the inner hoops (1); each inner hoop (1) is formed in a way that two or more than two arc-shaped components are spliced to form a ring; the inner ring of the inner hoop (1) is provided with at least two radial bulge loops (4); and the periphery of each pile splicing part required to perform the pile splicing on the precast piles is provided with a groove (5) matched with the radial bulge loops (4). By adopting the pile splicing structure for the precast piles, the pile splicing among the precast piles is firm, and the pile splicing parts reach the stress requirement.

The invention discloses a midsize direct shear apparatus with non-lever type loading, comprising dual rails, a base, a lower shear box, an upper shear box, a pressure transferring plate, a horizontal loading device and a vertical loading device mounted on a beam, wherein the horizontal and vertical loading devices are respectively realized by the way of a stepping motor and a lead screw. Both the load applied to the vertical direction and the load applied to the horizontal direction are measured by a load sensor. The vertical displacement and the horizontal displacement are measured and further controlled by a grating ruler displacement sensor fixed on the lead screw. The shearing area reducing value can be indirectly obtained through the measured value of the vertical displacement and the horizontal displacement, so as to control the loading force of the vertical loading device, that is to say the vertical normal stress can keep a dynamic constant. The direct shear test can more realistically reflect the actual shear strength characteristics of the rock and the soil. Due to the adoption of a transparent toughened glass mode and a matched digital camera, the development change process of the shear surface can be tracked and observed in a real-time manner.

Flexible material clamp discloses two parts, triangular bar and rigid clamp having congruent triangular channel. The bar has base and two major inclined surfaces meeting at acute angle, length of the major surfaces being at least three times base height. Clamp has internal triangular channel whose major surfaces are congruent to major surfaces of triangular bar. One clamp end opens into apex of the channel and at least one side of clamp opens to triangular channel. One end of flexible material to be clamped is wrapped about triangular bar and overlapped upon itself. The wrapped bar is inserted into clamp channel though the at least one open side of clamp and flexible material is passed through clamp opening at channel apex. Assembled wrapped bar and clamp connect to tensioning means causing clamp and bar to move relative to one another to lock flexible material between major surfaces of triangular bar and corresponding major surfaces of triangular clamp channel, locking flexible material in channel.

The invention discloses a four-point bending test device for pipe full-size evaluation, and relates to the technical field of testing device of engineering pipes and supporting components. A device of the prior art cannot meet engineering requirements in the aspects of test precision, load capacity, test safety and the like. For overcoming the shortcomings of the prior art, the technical scheme provided by the invention comprises that the four-point bending test device for pipe full-size evaluation includes an electric lifter, a force measuring sensor, a clamp assembly, a guyed displacement sensor, a magnetic suction block for connecting the displacement sensor and a sample, a lifting bridge, and lifting lugs for connecting the lifting bridge and a full-size evaluation test machine. With a ball head connection form of the clamp assembly, the test is closer to on-service real working conditions of a pipe, the electric lifter is used as a bending load loading mechanism, the supporting load is large, safe and stable, and loaded data are accurate; the displacement sensor replaces a strain gage acquisition system, so the efficiency is improved, and the financial resources are saved; and the four-point bending test device can meet the needs of engineering technology.

The invention relates to a motor, in particular to a chute low-noise motor, which comprises a machine seat, a stator, a rotor and a rotating shaft, wherein the stator, the rotor and the rotating shaft are arranged on the machine seat, the rotor comprises at least two sections of rotor iron cores, the rotor iron cores are punched and laminated by a false axis inclination angle taper key method to form chute iron cores; chutes of the adjacent chute iron cores are in opposite directions and are in arrangement in a way of staggering for an angle alpha. Therefore, the chute low-noise motor has the following advantages that 1, great-degree optimization is respectively realized in aspects of vibration, noise, iron core laminating quality, cast aluminum quality and chute cast aluminum rotor structure adopted by a high-power motor, and the chute low-noise motor is suitable for small and medium-sized cast aluminum rotor structure alternating current motors with higher vibration and noise requirements; 2, the stress uniformity and the rigidity of iron core laminating punching are fundamentally ensured, the iron core laminating quality is improved, the influence of deformation on vibration noise is reduced, the aluminum overflowing and bubble problems are solved, and the quality of the cast aluminum rotor and the motor performance reliability are improved.

The invention relates to the field of pipe fitting polishing, and discloses a pipe fitting polishing device. The pipe fitting polishing device comprises a machine frame and a supporting table, a conveying roller is rotationally connected to the supporting table, a clamping ring is rotationally connected to the supporting table, a through hole is formed in the middle portion of the clamping ring, driving teeth are arranged on the outer wall of the clamping ring, the interiors of the driving teeth are hollow, abutting-against rods are fixedly connected to the top ends of the interiors of the driving teeth, the other ends of the abutting-against rods are fixedly connected with abutting-against blocks, first supporting springs are fixedly connected between the top ends of the interiors of thedriving teeth and the outer wall of the clamping ring, a rack is in sliding connection to one side of the supporting table, a reset spring is fixedly connected to the upper portion of the rack, and anair bag is arranged above the rack and is opposite to the rack; and an air cylinder is in sliding connection to the supporting table, a guide pipe is connected between the air cylinder and the air bag, polishing strips are fixedly connected to the supporting table and are located on the opposite sides of the supporting plate, and the supporting table is further provided with a pushing mechanism used for pushing and abutting against the air cylinder. By means of device, the problem that a traditional polishing device cannot evenly polish a pipe fitting or local polishing is excessive is solved.

The invention discloses a metallographic grinding and polishing machine. According to the technical scheme, the metallographic grinding and polishing machine is characterized by comprising a base plate, an object carrying plate, a supporting rod and a pressing device, wherein the object carrying plate is rotationally arranged on the upper end face of the base plate, the supporting rod is arrangedon the upper end face of the base plate, and the pressing device is connected to the end, far away from the base plate, of the supporting rod; a first cavity is formed in the object carrying plate, aplurality of object storage holes communicating with the first cavity are formed in the upper end face of the object carrying plate, a plurality of grinding plates are rotationally arranged in the first cavity, and abrasive paper with different particle sizes is detachably arranged on the faces, facing the object storage holes, of the grinding plates; and the pressing device is used for abutting samples below the pressing device against the grinding plates, and the metallographic grinding and polishing machine is further provided with a grinding mechanism used for driving the grinding plates to rotate and a switching mechanism used for driving the object carrying plate to rotate. According to the metallographic grinding and polishing machine, the grinding plates provided with the abrasivepaper with different particle sizes and the switching mechanism are arranged so that the different grinding plates can be selected through the switching mechanism to control the grinding degree of themetallographic samples, and meanwhile the grinding efficiency is improved.

The invention provides a three-dimensional spacer fabric reinforced cement-based composite material and a preparation method thereof and relates to a cement-based composite material. The preparation method comprises the following steps: putting a three-dimensional spacer fabric into a mold, and compositing resin with the three-dimensional spacer fabric by virtue of a resin transfer molding technique; curing the resin, so as to obtain a three-dimensional spacer fabric composite material skeleton; and uniformly mixing and stirring a cement binding material, water and an additive, pouring the mixture into the three-dimensional spacer fabric composite material skeleton, and carrying out compacting, hardening and maintenance forming, so as to obtain the three-dimensional spacer fabric reinforced cement-based composite material. According to the preparation method, composite material skeletons of various shapes can be obtained by virtue of the compositing of the three-dimensional spacer fabric and the resin and can be produced into building components of various shapes through cement pouring and solidification. Furthermore, the cement-based composite material has the advantages that the strength of common concrete is greatly improved, the construction is simple and convenient, and the performance is excellent.

The invention discloses a treatment couch specific to rehabilitation of a bedridden patient and belongs to the field of medical facilities. The treatment couch comprises an elastic mattress which is installed on a couch frame, the elastic mattress is composed of a plurality of elastic supporting columns which are distributed in a rectangular array, the elastic supporting columns comprise oil cylinders which are disposed on the couch frame, cylinder bodies of the oil cylinders are fixedly arranged on the couch frame, ends of piston rods of the oil cylinders are machined to form circular truncated cones, ball heads are fixedly disposed on the circular truncated cones, universal supporting seats are installed on the ball heads in a matching mode, reset springs sleeve the piston rods of the oil cylinders, two ends of the reset springs abut against bottom surfaces of the circular truncated cones and top surfaces of the cylinder bodies respectively, side walls of the cylinder bodies are communicated with an oil inlet pipe and an oil return pipe, and the oil inlet pipe and the oil return pipe are connected with a double-position on-off valve which is controlled by a programmable logic controller (PLC). According to the treatment couch specific to rehabilitation of the bedridden patient, local skin parts of a human body contact with the mattress through alternating control so that the local skin parts of the human body can contact with air in an alternating mode, the ventilating effect can be achieved, the rehabilitation effect of the patient can be improved, living qualities can be improved, and the treatment couch can be applied to rehabilitation of the patient.

A connector for securing a first cylindrical member to a second cylindrical member comprises a cylindrical body which includes a first end that is attached to the first member and a second end that is positioned proximate the second member, a cylindrical housing sleeve which is positioned concentrically over the body and which includes an upper end portion that is secured to the body and a lower end portion that is disposed adjacent the second member, a cylindrical primary piston that is positioned between the body and the housing sleeve, a locking mandrel which is connected to or formed integrally with the primary piston and which includes at least first and second annular portions that have different diameters, and a split lock ring which is supported by the lower end portion adjacent a number of locking grooves in the second member and which includes at least first and second cylindrical portions that correspond to the first and second annular portions of the locking mandrel. In operation, movement of the primary piston from a first position to a second position will force the first and second annular portions of the locking mandrel into engagement with the first and second cylindrical portions of the lock ring, respectively, and consequently force the lock ring into engagement with the locking grooves to thereby lock the connector to the second member.

The invention discloses a method for producing a glass fiber reinforced plastic anchor pole, especially a method for producing a highly torsion-resistant, anti-shearing prestressing glass fiber reinforced plastic anchor pole, comprising the following steps of: mixing unsaturated polyester resin, nanometer mullite, aluminium hydroxide, polyurethane, zine stearate, white carbon black, methylethyl ketone peroxide, TBPB and a mould release agent according to a mass ratio in a resin solution groove with stirring to produce a resin solution, followed by vacuum-pumping and bubble-removing; towing glass fibres from a filament rack, twisting the glass fibres on a twisting support to form a twist of 10-30 degrees by rotating and towing the twisted glass fibres into the resin solution groove for impregnation; towing the twisted and impregnated glass fibres into a cone-shaped sleeve for folding and bundle-forming as well as preforming; finally continuously towing the folded bundles of glass fibres into a hot pressing die, followed by molding at the temperature of 160-180 DEG C. The method provided by the invention is simple, and the anchor pole produced by the invention has high torsion-resistant and anti-shearing performance as well as low cost.