SU1295050A1 - Gapless key joint - Google Patents

Abstract

The invention relates to the field of machine building, in particular, can be used in machine tools, for example, when connecting parts of universal assemblies. The purpose of the invention is to preserve the strength characteristics and reliability of the connection with repeated use and vibration loads in the parts being joined. The keyed connection contains parts interconnected by a fastener, in the slots of which a prism key (W) 6 is installed. W 6 has a slot 7, perpendicular to the plane of the connector of the parts to be connected, longitudinal pae 9, projections 10, on the side surfaces of which are bevelled 11 and pads 12 for engaging with the side surfaces of the keyway slots. The width of the groove 9, as well as its depth and the depth of the slit 7, are determined from the condition of maximum utilization of the elastic properties of the material W 6 at the specified accuracy parameters of the WB. This makes it possible to reduce the laboriousness of manufacturing NG due to a decrease in the accuracy indicators imposed on them. 1 hp f-ly, 6 ill. yy 7g

Description

 112950

The invention relates to the field of mechanical engineering, to detachable joints of machine details, in particular, it can be used in machine tools, for example, when assembling parts of universal assemblies (USP).

The aim of the invention is the preservation of the strength parameters and 10

the reliability of the compound with multiple

use and vibration, expanding operational capabilities, reducing the labor intensity of manufacturing keyways in the parts to be joined.

FIG. a supposed joint with a protrusion on one side of the key, an incision is shown; Fig. 2 is the same, with protrusions on two side surfaces of the tabs; FIG. 3 shows embodiments of a key in an axonometric projection with a protrusion on one side surface; Figure 4 is the same, with protrusions on two side surfaces at one end; Fig. 5 shows the same, with protrusions at two ends on one side surface; Fig. 6 is the same, with protrusions on two side surfaces.

I

The keyed connection (Fig. 1) contains connectable parts and 2 interconnected by a fastening element 3 and having keyways 4 and 5 in which a parallel key 6 is installed. The latter has a slot 7, perpendicular to the surface of the connector 8 of the parts to be connected 1 and 2, a longitudinal groove 9, a protrusion 10, on the side surfaces of which there are bevels 11 and grooves 2 for engaging with the side surfaces 13 and 14 of the slots 4 and 5. The width of the longitudinal groove is determined by the ratio

h / 2 Н - Н ,, where h is the width of the longitudinal groove;

H is the total depth of the keyed slots in the parts being joined; H is the height of the key.

When shrinking joined parts

Ii 2 fastener 3 bevels

The 1 keys 6 interact with the side surfaces 13 and 14 of the key grooves 4 and 5, wherein the part of the key that is between the bevels

P and slot 7, is deformed, and, due to the presence of a longitudinal groove 9, the upper and lower parts of the deformed 5

0

0

five

0

P

are reconnected separately, ensuring that the key is located in grooves 4 and 5, respectively, of parts and 2. After closing connector 8 between parts 1 and 2, platforms 12 are in contact with side surfaces I3 and 14.

In the event that the protrusions, slots and longitudinal grooves are made on opposite sides of the key, the basing of the parts to be joined is provided at two points, thereby enhancing the operational possibilities of the connection.

The use of the intended joint allows to preserve the strength and rigidity of the joint with repeated use and vibration loads, to increase its durability and accuracy of the base of the parts being joined, especially in the case of assembling parts with inaccurately made or worn grooves, i.e. to expand the technological capabilities of the application and reduce the laboriousness of manufacturing keyways.

Claims (2)

1. A non-gap keyed joint containing a 1 prismatic key connected in the grooves 1 of 1 parts with counter longitudinal grooves, the symmetry of which is located in the plane of the connector of the parts to be connected, on the end surfaces of the connector perpendicular to the surface of the connector with 1x of parts are slotted directed along the axis of symmetry of the key, which is provided with means of deforming elastic sections formed by slots and grooves, characterized in that, in order to preserve the strength parameters and above zhnosti with repeated use, the means of elastic deformation sections are situated on the lateral surface of each side with the tongue groove and are formed as protrusions from the oppositely directed CKocai «M, limited to the walls of grooves contact pads t of the connected parts, the key width at the beginning of the oncoming bevels is less than the minimum width, at the location of the pads is greater than the maximum width of the slots of the parts being joined, the longitudinal grooves are made on the face surfaces of the key and intersect i129 :: - 0 50 SYa with proposes m, and the depth of plz and slots is determined by the relation: fMaxc lS, S, lF- (H, -h) .. cf) / z: (r, d, d (. the maximum depth of the longitudinal groove and slot; S, is the tolerance for the key width; tO Sj - tolerance for the width of the groove under key; H, is the height of the key; h is the width of the longitudinal groove; B is the width of the key from its lateral surface to the lateral surface of the slot, (without taking into account the height of the protrusion); ot is the bevel angle of the projection surface; C - friction angle; E is the modulus of elasticity; 21Q total shrinking force of connected parts, 2. Compound according to claim, characterized in that the protrusions are filled on two opposite key surfaces of the key, 7J 6  YU fig P  P eleven FIG. five Editor A.Petrov Compiled by V.Ivanov Tehred A.Kravchuk Order 598/38 Circulation 760 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader G. Reshetnik