39results about How to "Improve clamping rigidity" patented technology

A steering column apparatus comprising: a steering column provided with a body-side bracket mounted to a body strength member to have a pair of side plate portions opposed each other to be extended in a vertical direction, and a substantially cylindrical distance unit for supporting a steering shaft to be rotatable therein and having a pair of pressed and expanding portions formed to be expanded by plastic working to be pressed and supported by the side plate portions of the body-side bracket; and an adjusting mechanism capable of adjusting a position of the steering column with respect to the side plate portions of the body-side bracket within a predetermined range, wherein the steering column is formed with a reinforcement portion for enhancing the clamping rigidity of the distance unit with respect to the side plate portions.

A steering column apparatus includes: a stationary column member; a movable column member whose one end is supported on the stationary column member nonrotatably about a center axis and movably along the center axis; a column head disposed on the other end of the movable column member; a wheel shaft supported rotatably on the column head; a column clamp for clamping and unclamping the movable column member with respect to the stationary column member at two or more points which are spaced along the center axis of the movable column member; and a control lever whose operation lever end is positioned in the vicinity of a steering wheel and which is capable of operating the column clamp.

The invention relates to an annular part fixture, which comprises a three-jaw wedge power chuck seat and a plurality of base jaws arranged on the three-jaw wedge power chuck seat. The annular part fixture is characterized in that the base jaws are fixedly connected with a clamping jaw hydraulic seat, a plurality of clamping jaw base holes are evenly arranged on the clamping jaw hydraulic seat with the circle center of the three-jaw wedge power chuck seat serving as the axle center, clamping jaw pistons and clamping jaws are successively arranged in the clamping jaw base holes, and the clamping jaw pistons push the clamping jaw to perform radial motion along the circle center of the three-jaw wedge power chuck seat under the action of internal hydraulic oil of the clamping jaw base holes. The annular part fixture can clamp irregularly-shaped annular forge piece blanks evenly and has the advantages that clamping force is more balanced, residual stress is remarkably reduced, required clamping force is smaller and clamping rigidity is larger, and clamping is firm.

The invention discloses a clamping and auxiliary supporting linkage mechanism which comprises a fixture body, a spring, an inclined wedge pin, a spherical adjustment lever, a three-point auxiliary support, a locking stud, a clamping and pressing plate and a locking nut, wherein the spring is arranged in the center inside the fixture body; one end of the spring is connected with the fixture body, and the other end of the spring is connected with the inclined wedge pin; the spherical adjustment lever is arranged at an inclined wedge of the inclined wedge pin; the spherical adjustment lever extends out of the fixture body; the three-point auxiliary support is arranged on the top of the inclined wedge pin; the locking stud is arranged on the fixture body above the spherical adjustment lever; the clamping and pressing plate is arranged on the locking stud; and the lower end of the clamping and pressing plate is connected with the spherical adjustment lever. The auxiliary supporting device is synchronously driven by a position adjustable clamping element, multi-point flexible auxiliary support is realized on the surface of a workpiece, the clamping rigidity of the workpiece is improved, the clamping stability and reliability are improved, the operations of clamping and adjusting the position of the auxiliary support are completed in one time, and the working efficiency is improved.

The invention discloses a clamping and fixing device for machining an axle shell of a heavy truck. The clamping and fixing device comprises a pedestal, an automatic hydraulic clamping mechanism, a hydraulic three-jaw chuck, an automatic hydraulic leveling mechanism, an auxiliary hydraulic support component, an auxiliary hydraulic clamping mechanism and a top type automatic hydraulic tailstock. The hydraulic three-jaw chuck is connected with a fourth shaft of a numerically-controlled machine tool, the fourth shaft of a numerically-controlled machine tool is connected with a rotary hydraulic oil tank, the automatic hydraulic clamping mechanism is installed on the top type automatic hydraulic tailstock, the automatic hydraulic leveling mechanism is used for helping the pipa panel of the axle shell to automatically level, the hydraulic three-jaw chuck is used for clamping the flange hole in one end of the axle shell, the top type automatic hydraulic tailstock is used for clamping the flange hole in the other end of the axle shell, the auxiliary hydraulic support component is used for supporting the axle shell, and the auxiliary hydraulic clamping mechanism and the automatic hydraulic clamping mechanism are used for clamping the surface of the axle shell. According to the clamping and fixing device for machining the axle shell of the heavy truck, the automation degree is high, the axle shell of the heavy truck is firmly and reliably clamped and positioned, and the machining efficiency and the machining quality of the axle shell are improved.

The invention relates to the technical field of aero-engines, in particular to a lathe fixture suitable for processing thin-walled ring-block parts, which is used for clamping thin-walled ring-block parts with thin walls that need to be processed. , the fixture is a circular disk surface, and a plurality of independent fixed blocks are evenly and symmetrically arranged on it. All the fixed blocks form a ring that is concentric with the circular disk surface of the fixture; Arrange the same number of unit fixtures as the fixed block, and evenly open square holes at the bottom of the fixed block, corresponding to the position of the unit fixture; each set of unit fixtures includes a pressing platen and a tensioning platen to fix the process edge and thin-walled ring block parts on the fixture in multiple directions . The invention effectively improves the clamping rigidity of the thin-walled ring block type parts by turning, avoids the chattering in the parts processing, reduces the processing deformation, greatly improves the qualified rate of the parts, and saves the cost.

A ventilation or check valve for ventilation or outlet openings of compressed air apparatuses of vehicles, includes at least one diaphragm disk which is made from flexible material, is held with a central region in a bore of a valve housing and is prestressed with a radially outer region against a valve seat on the valve housing, to lift up from the valve seat in a pressure-induced manner in the case of a pressure gradient between an inlet space and an outlet space or atmosphere and to open a flow cross section between the inlet space and the outlet space or atmosphere, in which, as viewed in the circumferential direction of the diaphragm disk, a plurality of hold-downs which are arranged at a circumferential spacing from one another and hold down the radially outer region of the diaphragm disk locally against the valve seat are provided on the valve housing.

The invention discloses a circular blade with an accurate positioning structure and a cutting tool. The circular blade comprises a blade body, wherein the blade body is composed of an upper surface, a lower surface and a side face which is used for connecting the upper surface with the lower surface; and the blade body is provided with a center hole which penetrates through the upper surface and the lower surface, the blade body is centrosymmetric relative to the central axis of the center hole, the upper surface intersects with the side face to form a cutting edge, the inner surface of the center hole is provided with at least two lug bosses, and the included angle between every two adjacent lug bosses is smaller than 180 degrees. The cutting blade has the advantages that positioning is reliable and stable, multi-ply clamping can be achieved, and the service life is long. The cutting tool is provided with the circular blade, sliding or rotating of the circular blade in the peripheral direction in the using process can be eliminated, the stability of the cutting edge in a cutting region is guaranteed, other cutting processes are prevented from participating in one cutting process, the usable frequency of the circular blade on the cutting tool is effectively stabilized, and then the service life of the cutting tool is prolonged.

The invention discloses a circular cutting blade with an accurate positioning structure and a cutting tool. The circular cutting blade comprises a circular blade body which consists of an upper surface, a lower surface and side surfaces connecting the upper surface to the lower surface, wherein a central hole which penetrates through the upper surface and the lower surface is formed in the blade body; the blade body is centrosymmetric with respect to a central axis of the central hole; the upper surface is crossed with the side surfaces to form cutting edges; at least one circular-arc-shaped groove which is matched with the surface of a fastening screw for fixing the circular cutting blade is formed in the inner surface of the central hole; and offset distance is formed between the groovecentral axis of the circular-arc-shaped groove and the central axis. The cutting tool adopts the cutting blade. The circular cutting blade has the advantages of being reliable and stable in positioning, prolonging the service life of the cutting blade and being capable of preventing the circular blade from rotating in the peripheral direction.

The invention relates to a machine for cutting a groove on a semi-round tube, in particular to a machine special for cutting a waist-shaped arc groove. The machine comprises a workbench, a groove cutting mechanism, a workpiece clamping mechanism, a groove cutting feed mechanism and a cooling mechanism; the groove cutting mechanism comprises a motive power mechanism, a groove cutting cutter, and acutter shaft bracket; the motive power mechanism transfers motive power to the grove cutting cutter to rotate the groove cutting cutter so as to perform groove cutting operation; the workpiece clamping mechanism comprises a workpiece clamping hand, a motive power transfer joint and a motive power device; and the motive power device transfers the motive power to the workpiece clamping hand throughthe motive power transfer joint, and the workpiece clamping hand works to tightly clasp a workpiece. The groove cutting feed mechanism comprises a carriage and a carriage diving mechanism arranged onthe workbench and used for driving the carriage to be fed or retreated; and a workpiece clamping mechanism is arranged on the carriage. The machine can radially cut arc grooves or waist-shaped arc grooves on a cambered surface of the semi-round tube conveniently, efficiently and accurately.

The invention discloses a polygonal cutting blade with bulge parts in a hole and a cutter. The polygonal cutting blade comprises a blade body consisting of an upper surface, a lower surface and a plurality of side surfaces connected with the upper surface and the lower surface, wherein a center hole penetrating through the upper surface and the lower surface is formed in the blade body, the bladebody is in central symmetry about the central axis of the center hole, each side surface and the upper surface intersect to form a plurality of cutting edges, one bulge part is arranged in the position, corresponding to each side surface, of the inner surface of the center hole, and the bulge parts directly face the corresponding side surfaces. The cutting blade has the characteristics of positioning reliability and stability, multiple clamping and long service life. The cutter comprises the cutting blade, fastening screws and the center hole of the cutting blade produce over-positioning multidirectional clamping under multiple constraints, deformation directions and areas unfavorable for fasteners are effectively controlled, the vibration of the cutting blade can be effectively attenuated during cutting, and the service life of the cutter is prolonged.

The invention discloses a knife box clamp for machining piston ring grooves. The knife box clamp for machining piston ring grooves comprises a knife box body (1), a side face knife clip (3), a ring groove knife (9) and a ring groove knife clamp. The knife box body (1) is provided with an installing groove (25). The ring groove knife (9) and the ring groove knife clamp are installed in the installing groove (25). The side face knife clip (3) is installed on the side, with the installing groove (25), of the knife box body (1) through side face knife clip installing screws (10). The ring groove knife clamp comprises a knife cushion block A (5), a knife cushion block B (6), side face pressing screws (16), an elastic expanding block (31) and elastic expanding screws (27). The bottom of the installing groove (25) is further provided with an elastic expanding screw installing block (2) through threads. The elastic expanding block (31) is arranged outside the elastic expanding screw installing block (2). The knife box clamp for machining piston ring grooves has the advantages that the knife box clamp can be used for clamping the ring groove knife for machining, and is high in rigidity, convenient to use, good in cooling and the like.

The invention relates to the technical field of tower crane manufacturing, and discloses a milling clamp for a right-angle splice bar. The milling clamp comprises a dividing head and a connecting plate, wherein the connecting plate is arranged on a dividing head main shaft and can rotate with the indexing head main shaft for indexing. The axis of the indexing head main shaft is horizontally arranged. Angle steel used for positioning two outer right-angle surfaces at the front end of the right-angle splice bar is arranged on the connecting plate. Two inner side surfaces of the angle steel are used as the positioning surfaces of the two outer right-angle surfaces at the front end of the right-angle splice bar and are parallel to the axis of the indexing head main shaft. Supporting plates arearranged across two side edges of the angle steel. The supporting plates are provided with propping elements for propping the right-angle splice bar to the positioning surfaces. By means of the milling clamp, the clamping and machining efficiency, the machining precision and the product quality are improved.