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GB T 2900.20-1994 Electrotechnical terminology High voltage switchgear
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Small ripple handwheel JB / T7273.1 includes two types, A and B, with five specifications respectively. Type A is made of aluminum alloy (AL102); Type B is made of plastic, and type B shaft hole is equipped with nested JB / T7275. The small ripple handwheel is cheap and good in quality. It is usually used as the rotating drive handle of the rotating mechanism with small driving torque, such as the handle of small pipe valve, the handle of small screw nut drive device, and the handle of manually tightened screw. This set of drawings includes small ripple handwheel JB / T7273.1A, B and all specifications (
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Five national standard JB/T9163.15 toggle splints. The model is a national standard part, including five conventional models, which will be used in the factory. It is a kind of special tool. The model contains a general format, and 3D software can be opened
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JB/T3411.57-1999 [Scoring ruler frame] 4 types of ruler frame offset adjustment structure. At present, in the inner circle factory of 1-3 meter outside micrometer, this kind of micrometer has no structure to adjust the offset of both ends of the micrometer. The ruler frame deviation adjustment structure consists of a support 1, a base plate 2, a connecting block 3 and a ruler frame 4. The connecting block 3 is placed in the holes at both ends of the ruler frame 4 and welded with the ruler frame 4 as a whole. A base plate 2 is placed on the connecting block 3 and is fixedly connected. A support 1 is placed on the base plate 2 and is fixedly connected with the base plate 2. This product is used in the adjustment structure of ruler frame deviation
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Hydraulic nut is an advanced bolt assembly method, which is especially suitable for tightening in narrow space and heavy load vibration machinery. The working principle of hydraulic nut is to use the hydraulic cylinder to directly apply external force to the bolt, so that the bolt to be applied is stretched in its elastic deformation zone. After the bolt is stretched, tighten the lock ring on the hydraulic nut, In this way, the bolt will be locked at the lengthened position by the lock ring. The hydraulic cylinder is located at the position of the central axis of the bolt, which is used to stretch the bolt axially to achieve the amount of tension required by the bolt. It is this amount of tension of the bolt that determines the clamping force required for bolt fastening. When the hydraulic nut is pressurized, the bolt is stretched, the same as
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JB / T3411.34-1999 The metal parts on the stamping die of 13 specifications of hexagonal punches, also called punch bars, punches or punches, are installed on the stamping die for continuous blanking, punching and breaking operations, so as to separate or plastic deform the processed materials, so as to obtain the required finished or semi-finished products
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Hexagon nut with shoulder is used together with bolts and screws to connect and fasten parts. Among them, Type 1 hexagon nuts are the most widely used, and Grade C nuts are used on machines, equipment or structures with rough surfaces and low precision requirements; Class A and B nuts are used on machines, equipment or structures with smooth surfaces and high requirements for precision. The thickness m of type 2 hexagon nut is relatively thick, and it is often used in situations where assembly and disassembly are often required. The thickness m of the hexagonal thin nut is relatively thin, and it is usually used in situations where the surface space of the connected parts is limited
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JB/T3411.65-1999 [Scoring disc] 5 models, the structure of scoring disc is mainly composed of base, column, scoring needle and clamping nut. Both ends of the scriber are divided into straight end and elbow end. The straight end is used to scribe, and the elbow end is often used to scribe the position of the workpiece
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JB/T7942.1-1995 pressure bar type oil gun is suitable for various small mechanical equipment, mobile mechanical equipment and places with few lubrication points and infrequent oil filling. It can also be used as the main engine in the single line centralized lubrication system of mobile small mechanical equipment
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Z1 type expansion joint sleeve JB/T7934-1999: integral cone ring, used in pairs, easy to disassemble, can replace various key connections and interference connections. In order to transfer large loads, multiple pairs of rings can be used, with no more than 4 pairs of rings compressed on one side and up to 8 pairs of rings compressed on both sides. The centering accuracy is high when the hub mating surface is centered. There are 65 models (the same size as the real object) of Z1 expansion joint sleeve, most of which are available in stock. However, due to different regions, the market demand is not the same, so not every expansion company can do all of the cash, in order not to affect
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JB/T10127.2-1999 [Isosceles angle iron angle iron]. A total of 6 types of angle iron, commonly known as angle iron, are long steel bars with both sides perpendicular to each other. It can be divided into equal angle steel and unequal angle steel. The two sides of equal angle steel are equal in width. It is mainly used to make frame structures, such as high-voltage transmission towers, frames on both sides of the main beam of steel structure bridges, columns and booms of tower cranes on construction sites, columns and beams of workshops, etc., and small places such as flower pot shaped shelves placed on the festival side, shelves hung with air-conditioned solar energy under windows, etc
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JB/T3411.3-1999 [Elastic rotating cutter bar] There are four specifications in this standard. This standard specifies the interchange dimensions between the milling cutter and the cutter bar or spindle of the milling cutter, that is, the diameter of the inner hole, cutter bar or spindle and the elements of the key or end key transmission. This standard is applicable to various milling cutters installed on cutter bars or mandrels
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JB/T10127.1-1999 [Equal angle iron angle iron] There are 7 types of angle iron, commonly known as angle iron, which are long steel bars with two sides perpendicular to each other. There are two types of equal leg angle steel and unequal leg angle steel. The two sides of equal leg angle steel are equal in width
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JB/T7850-1995 "Quick change connector [1]" is a wide range of industrial product accessories, including hydraulic pipe quick change connector and excavator quick change connector. This refers to the excavator quick change connector (also called quick connector, quick connector). Quick change connector can quickly install various configuration parts (bucket, scarifier, breaking hammer, hydraulic shear, etc.) on the excavator, which can expand the scope of use of the excavator, save time, and improve work efficiency
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