Friction type electromagnetic clutch with slip ring is an electromagnetic clutch with simple structure, low cost and low power consumption. It is suitable for various mechanical systems to automatically complete the function transmission. It is based on the existing electromagnetic clutch structure, the outer friction plate is made into a narrow plate type, a semi- trapezoidal magnetic conductive plate is added, and the magnetic circuit and electromagnetic parameters are optimized and created. The electromagnetic clutch is fed by a brush slip ring, and its structure is composed of a yoke body, a semi-trapezoidal magnetically conductive plate, internal and external friction plates, spring plates, armature and coupling structure. The armature is attracted by electricity, and the friction plate group is compressed to realize torque transmission, and the torque transmission is terminated when power is off.
An electromagnetic clutch composed of a yoke body, a coil, a semi-trapezoidal magnetically permeable plate, a slip ring, an outer friction plate, an inner friction plate, a spring plate, an armature, and a connection. The inner friction plate is made into a wide plate type. The outer friction plate is made into a narrow plate type. The wire groove is made into one of trapezoid, semi-trapezoid, and parallelogram. A magnetic conductor is provided on the end face of the yoke body with a length equal to the bottom surface of the wire groove. The shape is made into one of a half trapezoid, a square, and a rectangle. Species.
This slip-ring friction type electromagnetic clutch is suitable for use in a mechanical transmission system. When the main drive is running, the driven part can be engaged or disengaged with the driving part to achieve the purpose of reversing braking and the like. At present, there are basically two types of slip-ring friction electromagnetic clutches. One is simple structure, convenient manufacturing, low cost, and low price, but it has a backward structure and poor product performance. The other has advanced performance, but it is complicated to manufacture, consumes a lot of labor and materials, and has a high price. For the price of one unit of the same specification, you can buy the former three or four units. Because the price is cheap, the former still occupies a large market.
In order to design an electromagnetic clutch product that has the former one which is convenient to manufacture, low cost, and cheap, and has the latter advanced technical performance, the electromagnetic clutch does not need a gear sleeve, and the spline hole is directly drawn on the yoke. The inner and outer friction plates are alternately directly placed on the end face of the yoke body. The inner friction plate is engaged with the spline shaft, and the outer friction plate is engaged with the coupling claw. The coil is placed in the yoke, and the two ends of the lead-out wire are connected to the slip ring and the yoke body respectively. The feeding is completed by the brush and the slip ring. The current attracts the armature to compress the friction plate group, and transmits the torque to the passive On the side, after the power is cut off, the inner and outer sheets are separated by a spring sheet.
In order to make it have advanced technical performance, the outer friction plate is made into a narrow plate type to increase the friction radius. However, in order to replace the electromagnetic clutch that is widely used in the market, its external dimensions, spline holes, and installation dimensions must be exactly the same. Therefore, when the inner diameter of the outer plate increases, the end surface of the yoke body and the bottom surface of the wire groove Within the same length, trapezoidal, square and rectangular magnets are provided. The design is a semi-trapezoidal magnet, and the optimal scheme is adopted for the coil parameters and magnetic circuit. Through the above design, the product has the same low cost and the same low price as the previous electromagnetic clutch, and at the same time, the static and dynamic torque are doubled in performance, the on time is reduced by 20%, and the off time is reduced by 70%. The weight has been reduced by 15%. In particular, it has significant power saving, and its technical performance has caught up with the latter electromagnetic clutch, with considerable benefits.
Referring to the drawings, the inner hole of the yoke body 2 is drawn into a spline, and a slot for accommodating the coil 4 and the semi-trapezoidal magnetically permeable plate 5 is formed on the end surface of the yoke body. The two ends of the lead wires are respectively welded to the slip ring 6 and the yoke body 2 through the lead wire holes. The outer circle of the yoke body 2 is provided with a slip ring 6 which is cast with epoxy resin, and the slip ring of the yoke body 2 6 mutually insulated. The inner friction plate 9, the spring plate 8, the outer friction plate 7, and the armature 10 inlaid with a magnetic sleeve are respectively placed on the end faces of the yoke body 2 in the order shown in the figure, and the six claws of the joint 11 are embedded in the outer friction Inside the six slots of the sheet 7. The spline hole of the inner friction plate 9 is engaged with a user's spline shaft. The brush 1 and the slip ring 6 are in close contact. The power supply feeds the coil through the brush 1 and the slip ring 6 and sucks the armature to compress the friction plate group to realize torque transmission. After the power is cut off, the spring plate 8 separates the inner and outer friction plates. Delivery terminated.