31results about How to "Increase tightening force" patented technology

The invention discloses a double-limb splicing thin-walled cold-formed steel efficient component. The double-limb splicing thin-walled cold-formed steel efficient component comprises two sigma-shaped web cold-formed thin-wall complex lipped steel channel opening components which is composed of upper webs, stiffening ribs, lower webs, flange edges, crimped edges and recrimped edges. The double-limb splicing thin-walled cold-formed steel efficient component is characterized in that the sigma-shaped web cold-formed thin-wall complex lipped steel channel opening components are spliced into in a back-to-back or face-to-face manner, and the connecting manner is that the upper webs and lower webs are connected through tapping screws, or the crimped edges are welded together in a welding manner. The double-limb splicing thin-walled cold-formed steel efficient component disclosed by the invention has the advantages that when the double-limb splicing thin-walled cold-formed steel efficient component is utilized as a compression member, the ratio of height to thickness of the webs is obviously reduced in a back-to-back double-limb splicing manner, the compressive capacity of the component is obviously strengthened, and the bearing capacity of the spliced components is obviously improved compared with the sum of bearing capacities of two single limb components; compared with the single limb component, the double-limb splicing thin-walled cold-formed steel efficient component has the advantages that the defects that the antitorque capacity of a single limb opening component is poor, the difference of the inertia moments of two main shafts is large and the like are overcome, the multi-time buckling of a steel plate also can provide the strong ring constraint on the interior concrete, the tightening ring force of the concrete is strengthened, and thus the bearing capacity of a compound section is improved.

The invention provides a fixed hook rack assembly for a tile roof solar cell assembly. The fixed hook rack assembly comprises a base, a guide rail installation rack, connecting screws and a guide rail connecting limit block, wherein the base comprises a fixed connecting edge and a clamping edge; a waist-shaped hole is formed in the fixed connecting edge; the guide rail installation rack comprises a connecting vertical edge, a horizontal edge and a guide rail installation edge; two ends of the horizontal edge are vertically and fixedly connected with the connecting vertical edge and the guide rail installation edge respectively; a connecting threaded hole is formed in the connecting vertical edge; one connecting screw passes through the waist-shaped hole and the connecting threaded hole to fix connect the fixed connecting edge and the connecting vertical edge; an anti-deformation support edge is arranged at the outer side edge of the connected part of the guide rail installation edge and the horizontal edge; a bearing edge is arranged on the guide rail installation edge; and a guide rail passes through a guide rail installation groove and the guide rail connecting limit block through the other connecting screw to be fixedly arranged on the guide rail installation edge. The fixed hook rack assembly is light in weight, good in bearing strength, not easy to deform, good in wind resistance and corrosion resistance and long in service life, and can meet the requirements of a solar bracket on a high-quality product, and a potential safety hazard is completely eradicated.

A method of molding a resin molded body, wherein an annular mounting seat (11) integrally formed projectedly from one surface of a panel body (3) so as to surround a through hole (9) is formed of an inner mounting seat part (17) and an outer mounting seat part (19) formed double on the inner and outer sides and connecting mounting seat parts (21) connecting the inner mounting seat part (17) to the outer mounting seat part (19) at four positions. Skin layers (23) are formed on the surfaces of a door inner panel (1). An expansion layer (25) having a large number of voids is formed in the panel body (3). The mounting seat (11) and the panel body (3) between the inner mounting seat part (17) and the outer mounting seat part (19) are formed of a solid layer (27) without the expansion layer (25). Thus, the resin molded body having a lightweight but highly rigid mounting seat can be provided.

The invention belongs to the technical field of electric power operation climbing robots, and particularly relates to a clamping assembly with an angle and height adjusting function. The clamping assembly comprises a clamping jaw, an angle adjusting assembly and a lifting assembly, wherein the angle adjusting assembly is mounted on the clamping jaw and can adjust the pitch angle of relative anglesteel, and the lifting assembly can enable the clamping jaw to move close to or away from the angle steel. The hinge axis of the angle adjusting assembly is horizontally arranged and is perpendicularto the length direction of angle steel. The clamping assembly enables a climbing robot to have extremely high obstacle crossing capacity and climbing efficiency, the action stability and the action reliability of climbing operation of the climbing robot can be synchronously guaranteed, and therefore the manpower inspection cost can be greatly reduced, the maintenance efficiency can be improved, and safe and reliable operation of a power transmission system can be guaranteed.

A system disconnector for disconnecting an upstream liquid system providing an inlet pressure from a downstream liquid system by a release valve (34) in response to a pressure drop between the systems, includes an upstream backflow preventer (40), a downstream backflow preventer (64) and a release valve body piston (18) arranged between the backflow preventers (40, 64). A pressure difference between the inlet pressure and a middle pressure between the backflow preventers (40,64) counteracts a spring (60) biasing the release valve body in the opening direction, the release valve body (18) having an effective pressurized surface (d) smaller than the surface effective for the inlet pressure. A hollow space (74) defined by the release valve body is connected to the middle pressure (66). A shiftable seat (76) provided in hollow space (74), is movable with respect to the release valve body to a fixed stop (84) upstream of the valve seat (32).

The invention belongs to the technical field of hydraulic tools, and particularly relates to a hydraulic tool one-way valve and a hydraulic tool. The one-way valve comprises a valve seat and a valve body which are fixed in a valve hole and a valve core and a spring which are arranged between the valve seat and the valve body, the spring abuts against the valve core and the valve body, and the plane of the upper end of the valve core and the lower end face of the valve seat abut and form a first sealing face under the elasticity of the spring; a plurality of overflowing holes are uniformly distributed in the bottom of the valve body, when the upper end face of the valve core is separated from the lower end face of the valve seat, the overflowing holes are communicated with the through hole,and mediums in the through hole flows out from the overflowing holes. According to the one-way valve, the shape of the valve core is changed, plane sealing is adopted by the part between the valve core and the valve body, the sealing performance of the one-way valve is greatly improved by matching with the reduced sealing contacting face between the valve core and the valve body, and the oppositeposition oil returning of the one-way valve in the working process is prevented.

The invention belongs to the technical field of sandwich devices, and in particular relates to a sandwich device of a machining center, which includes a tool handle, a collet, and a collet. , after the threaded sleeve drives the collet to move up so that the upper tapered surface on the collet contacts the inverted tapered groove tapered surface on the tool holder, and then continues to rotate the collet, the collet can be compressed to a greater degree, so During this process, the jacket moves up to a greater extent, and the jacket will cause the connecting rod to have a relationship with the second slope, and release the limit to the limit ring, so that the limit ring will move upward; the tension of the first spring is released, and this When the user rotates the collet, the rotational force will suddenly decrease. After sensing the force reduction, people will realize that the tool may be worn or the tool is not installed, and then the rotating collet will stop; to a certain extent It can prevent the damage to the collet caused by the continuous rotation of the collet.

The invention discloses an installation type double-axis automatic tightening device, which comprises a drive bracket, a front support base, a rear support base, a switch bracket, a servo motor, a reducer, a gear unit, a tightening shaft, a cylinder and a fixing base, and the front end of the drive bracket It is connected with the front support base by bolts, and the end of the drive bracket is connected with the rear support base by bolts. The switch bracket is located in front of the front support base, and is located under the two tightening shafts as a whole. The tightening shaft includes support shafts, shaft end flanges, sleeves, rectangular Keys, bearings, fastening nuts, straight joints, adapters, pistons, disc springs, springs, compression sleeves, tightening sleeves and drive shafts, the support shaft is connected to the driven gear through the key, and the servo motor drives the drive gear to rotate through the reducer . The invention provides an installed double-shaft automatic tightening device suitable for small space and small distance between two shafts.

The invention relates to a kind of reinforcement which can not only enhance the tightening force of the outermost coil spring sheet of the coil spring, but also does not increase the maximum pull-out force of the coil spring, and at the same time can improve the use effect of the ear hook, and at the same time, the production cost is low and the production is convenient. A type reel coil spring, the inner side of the outermost coil spring is provided with a piece of spring steel, and the outer end of the spring steel is fixedly connected with the outermost coil spring, and the inner end of the spring steel is The head is located between the outermost coil spring and the second outer coil spring. Advantages: First, a spring steel sheet added to the reinforced coil spring can not only enhance the tightening force of the outermost coil spring of the coil spring, but also will not increase the maximum pull-out force of the coil spring, and the production cost is low. 2. The ear hook in the coil spring of a reinforced hose reel has better overall strength, and the opening of the ear hook is not easy to expand during use.

The invention relates to a transmission connection structure of a fan impeller of a sweeper truck, and belongs to the technical field of environmental sanitation machinery. The transmission connection structure comprises a volute, the impeller, a conical shaft sleeve, an impeller flange, set screws, a motor output shaft and a pressing plate. The volute and a motor and the impeller flange and the impeller are fixed by fasteners, and the motor output shaft is connected with the conical shaft sleeve through a flat key; the outer circumference of the conical shaft sleeve is in conical surface fit with the hollow circumference of the impeller flange, the conical shaft sleeve extends into a middle hole of the impeller flange from one side of the conical shaft sleeve, and the pressing plate is attached to the other side of the conical shaft sleeve; the conical shaft sleeve is symmetrically provided with two first semicircular blind holes, a first half-thread through hole and a through slot; the impeller flange is symmetrically provided with two second half-thread through holes and a second semicircular blind hole; and the two first semicircular blind holes and the two second half-thread through holes are oppositely combined to form two first circular holes respectively, the first half-thread through hole and the second semicircular blind hole are oppositely combined to form a second circular hole, and the screws can be screwed into the first circular holes or the second circular hole. According to the transmission connection structure, besides the flat key transmission force, the screwing force, the elastic force and the friction force are increased, so that the connection between the fan impeller and the motor is tighter.

The invention relates to a nut looseness preventing structure applicable for screw press especially improvement of nut looseness preventing structure in bolt and slide block device of screw press. The nut has a slot on bottom, a slot on upper part of nut seat, and the two slots are connected and fixed by a flat key. The nut and nut seat outer rim are connected and fixed by a bolt. By dividing the nut into two parts of nut and nut seat and replacing the original straight pin by a flat key, the nut radial bearability can be improved greatly.

The invention relates to a cap-screwing machine chuck, which is used for clamping a bottle cap. The cap-screwing machine chuck comprises a plurality of jaws, a jaw base and a pusher; the jaws are used for clamping the bottle cap; the jaws are evenly mounted around the jaw base; the pusher is used for pushing the jaws to move, and can push the jaws to shift oppositely or relatively under the action of power. The cap-screwing machine chuck adopts wedge structures to drive the jaws to shift for grabbing and releasing, changing the conventional way of action which drives the jaws to swing for grabbing and releasing; the jaws of the cap-screwing machine chuck are always stressed for clamping in the horizontal direction, while the conventional jaw has an articulating point and the characteristic of articulation is utilized to swing the jaw, which is equivalent to lever motion, so the grabbing force and stability of the conventional jaws are not as good as the grabbing force and stability of the cap-screwing machine chuck; moreover, the design of the mechanism for driving the jaws to move is simplified, so the entire machine becomes more excellent and the cost is reduced.