RU2131068C1 - Bolted joint for parts - Google Patents

Abstract

FIELD: bolted joints taking up transversal loads; mechanical engineering; instrumentation engineering; manufacture of flying vehicles. SUBSTANCE: bolted joint includes bolts with smooth areas fitted at clearance in holes of first and second parts. Threaded stops are mounted beyond joint area of parts to be connected; they are fitted in pairs towards each other in parallel with plane of joint; they may be placed in clearances between surfaces of hole in first part and smooth area of bolt and may be engageable with smooth areas of bolts. EFFECT: enhanced efficiency in relief of bolts from transversal forces at change of relative position of parts being secured. 2 dwg

Description

 The invention relates to bolted joints of parts that receive transverse loads when the bolts are placed in the holes with a gap. Bolted joints can be used in various fields of mechanical engineering and instrument engineering, when when assembling assemblies before final fixing it is required, for example, to change the relative position of the parts to be joined in the junction plane by the condition of collectability. The primary area of use of the invention is the manufacture of a spacecraft (SC).

 A bolted joint is known in which the transverse load is perceived by the unloading device in the form of pins located at the junction of the parts to be joined. (see Orlov PI, Fundamentals of Design. Book 2. Ed. by P. N. Uchaev - M., Mechanical Engineering, 1988, p. 114 - 117).

 The disadvantages of such a device are the complexity of the assembly and disassembly of products containing bolted joints due to the fixation of the joined parts from the shift "in place".

 A device for connecting parts containing bolts installed in the holes of one of the parts with a gap, and adjusting screws to ensure a change in the position of the parts in the joint area before final fixation, installed outside the joint of the parts to be joined in pairs towards each other (Prototype, A.S. USSR N 1767245, CL F 16 B 5/02, 07.10.92).

 Such a device simplifies the assembly and disassembly of products containing bolted connections, allows you to compensate for misalignment of the connected parts before final fixation, however, it does not provide unloading of bolts from transverse forces, leading to the need to increase the cross section of bolts or use special purpose bolts.

 The present invention solves the problem of unloading bolts from transverse forces with the provision of changing the relative position of the fixed parts in the joint area before the final fixation.

 The problem is solved due to the fact that the bolt connection of parts containing bolts with smooth sections installed in the holes of the first part and in the holes of the second part and threaded stops installed outside the joint of the parts to be joined in pairs towards each other are made with stops installed parallel to the plane the junction of the connected parts with the possibility of their placement in the gaps between the surfaces of the holes in the first part and smooth sections of the bolts and contact with the latter.

 In FIG. 1 is a perspective view of a bolted connection; FIG. 2, in cross section of a bolted connection, the position of the adjusting stops is shown.

 Parts 1, 2 are tightly connected at the joint E using bolts 3. In part 1, gaps 4 are made in which threaded stops 5a - 5e are placed in contact with smooth sections of bolts between the surfaces of the holes in the first part and smooth sections of bolts 3. Threaded stops are installed parallel to the joint plane in pairs towards each other.

 Bolted connection works as follows. Parts 1, 2 are positioned relative to each other, tighten the bolts 3, and then, by moving the stops 5a - 5e along the threads in the first part, ensure that the stops contact with the smooth sections of the corresponding bolts, thus achieving the final fixation of the bolt connection. According to the operating conditions, the stops can be stopped by known techniques (not shown in Fig.).

 The positive effect of the invention is achieved due to the fact that the first part in the gaps has the ability to change the position relative to the second part in the joint plane until the bolts are tightened, and fixing with stops in the first part allows to reduce mutual deformation of the bolts from transverse forces due to a change in the boundary conditions of bolt fastening.

Claims (1)

 Bolt connection of parts, containing bolts with smooth sections and threaded stops installed with a gap in the holes of the first part and in the holes of the second part, installed outside the joint of the parts to be joined in pairs towards each other, characterized in that the threaded stops are installed parallel to the joint plane of the parts to be joined with the possibility of their placing in the gaps between the surfaces of the holes in the first part and a smooth section of the bolt and contact with smooth sections of the bolts.

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