GB/T 4323-2017Pin coupling with elastic sleeve (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 4323-2002 "Pin coupling with elastic sleeve". Compared with GB/T 4323-2002, except for editorial revision, the main technical changes are as follows.

-Removed the side view drawing and parts number in Figure 1, Figure 2 and added essential dimensions;

- Made major adjustments on Table 2, Table 3 and added essential values;

-Deleted GB/T 93, GB/T 531, GB/T 1693, GB/T 3512 and GB/T 6557 in Normative references;

- Removed Figures 3 ~ Figure 5 and Table 4;

- Changed 5.2 and Table 5 in the technical requirements to 3.3 and Table 3, integrated the technical requirement in Chapter 3, and amended the contents of Table 3;

- Removed Chapter 6 "Test methods".

1 Scope

This Standard specifies the structural types, basic parameters, main dimensions, marking method, technical requirements and inspection rules of the standard LT type and LTZ type elastic sleeve pin couplings (hereinafter referred to as the coupling).

This Standard is applicable to the driving shaft system connecting the two coaxial lines with transmission nominal torque of 16N·m~ 22 400N·m at working temperature of 30°C~ +100°C, and has the function of compensating the relative displacement of the two axes and buffering the axes.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 528 Rubber, vulcanized or thermoplastic. Determination of tensile stress-strain properties

GB/T 529 Rubber, vulcanized or thermoplastic. Determination of tear strength (Trouser, angle and crescent test pieces)

GB/T 531.1 Rubber, vulcanized or thermoplastic. Determination of indentation hardness. Part 1. Durometer method (Shore hardness)

GB/T 699 Quality carbon structure steels

GB/T 1681 Rubber. Determination of rebound resilience of vulcanizates

GB/T 1682 Rubber, vulcanized. Determination of low-temperature brittleness. Single test piece method

GB/T 1689 Rubber vulcanized. Determination of abrasion resistance (Akron machine)

GB/T 1690 Rubber, vulcanized or thermoplastic. Determination of the effect of liquids

GB/T 3098.2 Mechanical properties of fasteners. Nuts

GB/T 3852 Types and dimensions for coupling bores and their connection

5 Technical requirements

5.6 The working surface of the brake wheel shall be quenched. The hardness is 40 HRC~ 50 HRC, and the depth of effective hardened layer is 2mm~ 3mm.

5.7 The heat treatment hardness of the pin is 241 HBW ~ 269 HBW.

5.8 the maximum torque transmitted by the instantaneous overload of the coupling is twice that of the allowable torque.

5.9 For selection of coupling, see Appendix A.

6 Inspection rules