摘要:
Tensioning device (1) for a traction mechanism drive, such as a belt or a chain drive, with a tensioning arm (4), which can pivot about a pivot axle (3) relative to a body (2) and on whose distal end there is a roller (5) supported so that it can rotate for tensioning the traction mechanism, for the purpose of which there is a torsion spring (6) acting between the pivot axle (3) of the tensioning arm (4) and the body (2). The pivot axle (3) is supported in a sliding manner by at least one radial bearing arrangement (7) and at least one axial bearing arrangement (8) separated from this radial bearing arrangement, and the axial bearing (8) is constructed as a cone friction bearing and includes a cone bearing disk (9), which is locked in rotation with the pivot axle (3) and is guided subjected to friction on the end against a cone bearing surface (10) formed in the hub section of the tensioning arm (4).
摘要:
In a method and a device for producing curved lengths of spring band steel in order to produce precisely toleranced, dimensionally stable bending radii, the spring band steel (10) pass through a bending unit (20), which is comprised of three support points (23-25) spaced apart from one another, and passes through a reverse bending unit (22), which is disposed after the bending unit (20) in the advancing direction of the spring band steel (10) and is comprised of a fourth support point (32), and in a cutting unit (21), the curved and recurved lengths of spring band steel (11) are cut from the spring band steel (10). The central support point (24) of the bending unit (20) and the fourth support point (32) of the reverse bending unit (22) are embodied so that they can be moved and are controlled in their advancing in relation to the spring band steel (10) by means of a numerical control unit (20) in accordance with predetermined programs (FIG. 1).
摘要:
In a method for producing flat-blade windshield wipers with curved flat blades in particular, and for obtaining dimensionally stable bending radii with exact tolerances, a spring band formed by flat blades individually arranged one next to the other, is bent between three support sites spaced from each other in the longitudinal direction of the spring band and resting successively in an alternating manner on one of the two sides of the spring band, and the spring band is thereafter re-bent on a subsequent support site in the opposite direction by a re-bending degree lower than the bending degree. The flat blade so treated is subsequently separated from the spring band, combined with a rubber-elastic wiping strip, and provided with a connecting device for a wiper arm.
摘要:
Apparatus for adjusting a rotational relation between a camshaft and a timing pulley of an internal combustion engine of a type having a crankshaft for driving the timing pulley and a cylinder head for rotatably supporting the camshaft, includes a housing receiving a double-acting piston for displacement in an axial direction between two axially spaced end positions and defining with the housing two pressure compartments. Secured to the piston is a control bushing which is geared to the timing pulley via a first gearing and operatively connected to the camshaft via a second gearing. A hydraulic regulating unit is fluidly connected to the pressure compartments via fluid-carrying passageways for alternately supplying a pressure fluid to the pressure compartments to effect an axial displacement of the piston and thereby a positional adjustment of the control bushing, with the fluid-carrying passageways including, for movement of the piston into one of the end positions, two axially spaced distribution spaces which are fluidly connected to each other by transition zones arranged in angularly offset disposition.
摘要:
The invention relates to a check valve, for use as an insert check valve, with a valve seat and a valve element that is resiliently prestressed against the valve seat by a valve spring. According to the invention, a retaining element embodied as a retaining bracket is provided, which supports the end of the valve spring remote from the valve element and the retaining element can be locked resiliently to a recess, particularly an annular groove, of the valve housing. This enables fast, simple assembly of the check valve from its individual parts.
摘要:
A method for the manufacture of a superconductor with a superconductive intermetallic compound consisting of at least two chemical elements in which a ductile structural part made of at least one element of the compound is brought into contact with a second structural part which contains a ductile carrier metal for the remaining elements of the compound after which the remaining elements of the compound are admitted to the second ductile structural part through a chemical transport reaction at elevated temperature, the compound being formed by a reaction of its remaining elements, diffusing through the second structural part, with the first structural part.
摘要:
A method of manufacturing a superconductor having a superconductive intermetallic compound of at least two elements in which a ductile component consisting of one element of the compound is brought into contact with a second component consisting of an alloy containing a ductile carrier metal and the remaining elements of the compound, after which the two components are subjected to a cross section reducing process and then heat treated such that the compound is formed through a reaction of the first component with the elements of the compound contained in the second component.
摘要:
An analysis system (1) for the analysis of a sample, comprises a gel permeation chromatograph (14) that is coupled with a nuclear magnetic resonance(=NMR) spectrometer. The chromatograph (14) has a gel permeation chromatography(=GPC) separating column system (6a) that is filled with porous particles (21). The GPC separating column system (6a) includes at least the one GPC separating column (6), the GPC separating columns (6) of the GPC separating column system (6a) having an overall combined internal volume of at least 45 cm3, preferably at least 100 cm3. The NMR spectrometer is configured as a low-field NMR spectrometer (8) with a permanent magnet system (9) for generating a B0 field of the NMR spectrometer. The low-field NMR spectrometer (8) comprises a shim system (10) with which homogeneity of the B0 field of 0.5 ppm or better, preferably 0.1 ppm or better, can be achieved in a right circular cylindrical sample volume (27) having a diameter of at least 5 mm and a length of at least 15 mm. The low-field NMR spectrometer (8) further comprises a lock function (29) to compensate for a drift of the B0 field. The invention permits the quantitative and qualitative chemical analysis of samples containing substances of different molecular size with less expensive apparatus.
摘要:
Tensioning device (1) for a traction element drive, such as a belt or chain drive, with a tensioning arm (4), which can pivot relative to a body (2) about a pivot axle (3) and on whose distal end a roller (5) supported rotatably is arranged for tensioning the traction element, for the purpose of which there is a torsion spring (6) acting between the pivot axle (3) of the tensioning arm (4) and the body (2), and the pivot axle (3) is supported so that it can slide by at least one radial-bearing arrangement (7) and at least one axial-bearing arrangement (8), wherein the axial-bearing arrangement (8) comprises a friction disk (9) arranged concentric to the pivot axle (3), wherein the friction disk (9) has an axial stop surface (11), which comprises at least one radial circumferential key groove (12) and that at least one radial circumferential friction spring, which extends into the key groove (12), is constructed in the surface adjacent to the stop surface (11) of the friction disk (9).
摘要:
Tensioning device (1) for a traction element drive, such as a belt or chain drive, with a tensioning arm (4), which can pivot relative to a body (2) about a pivot axle (3) and on whose distal end a roller (5) supported rotatably is arranged for tensioning the traction element, for the purpose of which there is a torsion spring (6) acting between the pivot axle (3) of the tensioning arm (4) and the body (2), and the pivot axle (3) is supported so that it can slide by at least one radial-bearing arrangement (7) and at least one axial-bearing arrangement (8), wherein the axial-bearing arrangement (8) comprises a friction disk (9) arranged concentric to the pivot axle (3), wherein the friction disk (9) has an axial stop surface (11), which comprises at least one radial circumferential key groove (12) and that at least one radial circumferential friction spring, which extends into the key groove (12), is constructed in the surface adjacent to the stop surface (11) of the friction disk (9).