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.

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.

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 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.

To suppress a decrease in the tightening force of a seal lip with respect to a shaft regardless of the rigidity of a protrusion. An elastic portion of a sealing device includes an annular seal lip, and the seal lip includes a lip tip end portion and an interior side dust lip. The lip tip end portion is an annular portion protruding to the inner periphery side and formed to contact an output shaft of a reduction gear in the usage state. The interior side dust lip is an annular protrusion provided closer to a sealing target side than is the lip tip end portion. The interior side dust lip protrudes toward the axis x and is formed to contact the output shaft in the usage state. The seal lip also includes a dent portion, which forms a dent, on the outer periphery side of a base of the interior side dust lip.