Base Shaft Hinge MIM Parts

Product Introduction

Metal injection molding (Metal Injection Molding, referred to as MIM) is a new type of powder metallurgy near-net forming technology derived from the plastic injection molding industry. The strength of the product is not high. In order to improve its performance, metal or ceramic powder can be added to the plastic to obtain a product with higher strength and good wear resistance. In recent years, the idea has evolved to maximize the solids content and completely remove the binder and densify the shaped body during subsequent sintering. This new powder metallurgy forming method is called metal injection molding.

The utility model belongs to the technical field of machinery, and in particular relates to a novel positioning master hinge.

Background Technique

●Base Shaft Hinge MIM Parts is a device for connecting or rotating, so that the door, cover or other swinging parts can be rotated, usually composed of a pair of hinges connected by hinge shafts. Among them, the first hinge piece and the second hinge piece of the hinge on the market are usually turned arbitrarily, and the rotation angle between the two is not limited. In some specific occasions with strict restrictions on the opening angle, Such hinges cannot meet the requirements.

●At the same time, the hinge shaft in the prior art is an iron column, which is used to be strung between two hinges; screw pins are usually used for positioning, and threaded holes are processed on the hinges, and screws are used for lateral positioning and spring positioning. In-page riveted springs. This method not only increases the cost of maintenance, but also adds materials and additional assembly and processing procedures, resulting in waste of cost. At the same time, it is inconvenient to disassemble and assemble the screws, and the spring is prone to failure and jamming, causing abnormalities. Once an abnormality occurs, the entire product will be scrapped, resulting in maintenance costs. High; moreover, the rotation of the hinge shaft and the casing on the hinge will generate rotation noise, resulting in the problem of poor rotation fluency.

●In view of the above technical problems, it needs to be improved.

Technical Realization Elements

●The utility model aims to overcome the defects in the above-mentioned prior art and provide a new type of positioning hinge with simple and reasonable structure, solid overall structure, convenient assembly with the door frame, and low noise.

●In order to achieve the above objectives, the technical solution adopted by the utility model is: a new type of positioning sub-mother hinge, including hinge shafts, sub-leaf pieces and mother leaf pieces respectively rotatably connected to the hinge shafts; Including the door frame fixing plate, the inner side of the door frame fixing plate is provided with the first hinge shaft sleeve corresponding to the hinge shaft, the door frame fixing plate and the first hinge shaft sleeve are integrally formed; the middle part of the door frame fixing plate is formed with a receiving groove, and the sub-leaf Assembled in the receiving tank, the bottom of the receiving tank is equipped with anti-slip patterns; the sub-leaf includes a door fixing plate, and the inner side of the door fixing plate is provided with a second hinge shaft sleeve corresponding to the hinge shaft and the first hinge shaft sleeve A step-shaped positioning plate is fixed between the door fixing plate and the second hinge shaft sleeve, and a positioning block for resisting the door frame is fixed between the positioning plate and the second hinge shaft sleeve.

●As a preferred mode of the present invention, the outer side of the door frame fixing plate is fixed on the positioning projections with symmetrical arrangement.

●As a preferred mode of the present invention, the positioning block includes a connecting plate and a supporting plate, the supporting plate is vertically fixed at the end of the connecting plate, and the upper surface of the connecting plate is on the same plane as the upper surface of the second hinge sleeve; The outer end surface of the support plate is on the same plane as the outer end surface of the positioning plate.

●As a preferred form of the present invention, the hinge shaft includes a hinge core, a nylon bearing assembly and a nylon sleeve; the nylon bearing assembly is sleeved in the middle of the hinge core; the nylon sleeve is sleeved in the end of the hinge core, and the nylon bearing The components are abutted against each other; the nylon sleeve is sleeved on the inner side of the first hinge sleeve. The nylon sleeve includes a body, and a convex line is arranged on the outside of the body along its length direction. Correspondingly, the inner side of the first hinge sleeve is formed There are grooves matching the convex strips; a locating ring is fixed vertically on the body; a limiting protrusion is formed between the body and the locating ring, and the limiting protrusion is fit and clamped with the nylon bearing assembly.

●As a preferred mode of the present invention, a positioning notch is formed at the outer end of the body, the positioning notch corresponds to the position of the protruding line, and the end of the body is an arc inclined surface.

●As a preferred mode of the present invention, a number of shrinkage strips are fixed on the outer side of the body, and the shrinkage strips and convex strips are equidistantly arranged along the circumference of the body.

●As a preferred form of the present utility model, a second threaded hole is built in the end of the first hinge shaft sleeve, and bolts are installed in the second threaded hole; the bolts are tightened in the second threaded hole, and the bolts The end is against the hinge core.

●As a preferred mode of the present invention, the nylon bearing assembly includes symmetrically arranged bearing positioning sleeves, and the bearing positioning sleeves are sleeved on the inner sides of the two ends of the second hinge shaft sleeve.

●As a preferred mode of the present utility model, the bearing positioning sleeve includes a guiding part, a limiting part and a connecting part; the guiding part, the limiting part and the connecting part are fixedly connected and integrally formed.

●As a preferred mode of the present utility model, the outer side of the limiting portion is provided with a limiting convex line along its length direction, and correspondingly, the inner side of the second hinge shaft sleeve is formed with a limiting rib matching the limiting convex line. A positioning groove; a number of first contraction strips are fixed on the outer side of the limiting portion, and the shrinking strips and the limiting convex strips are equidistantly arranged along the circumferential direction of the limiting portion.

●The beneficial effects of the utility model are:

●The utility model is simple in structure and ingenious in design. A positioning block for resisting the door frame is fixed between the positioning plate and the second hinge shaft sleeve, so that the installation and positioning of the whole hinge is more convenient, and the assembly is convenient. Screw on the block for reinforcement, and the hinge is stronger;

●The utility model is fixed on the fixed plate of the door frame on a symmetrically arranged positioning bump; the set positioning bump can play the function of installation and positioning, and it can be installed against the door frame without measurement;

●The mother-child hinge of the utility model has no leaks, the mother-child hinge itself is precisely injected, and it is also fully sealed, oil-free, more durable, and has better fireproof function;

●The hinge shaft provided by the utility model, by setting the nylon bearing assembly and the nylon sleeve, makes the shaft core and the first hinge shaft sleeve and the second hinge shaft sleeve rotate during the rotation process; effectively reduces the rotation noise and ensures the rotation Fluency, can achieve mute effect, good wear resistance;

●The hinge shaft of this utility model can replace the original installation method using screws and springs. It has a simple structure and is easy to assemble and disassemble. Moreover, the nylon bearing assembly and nylon sleeve can prevent friction between the hinge and the hinge core, play a protective role, and have a long service life.

Metal Injection Molding Process

Detection Systems