The spline connection is composed of an internal spline and an external spline.Both internal and external splines are multi toothspare partsThe spline on the inner cylinder surface is the inner spline, and the spline on the outer cylinder surface is the outer spline.obviously,spline joint yesFlat keyThe development of connection in number.Splines are standard construction.
The parallel key connection is usually used for the connection between the gear or coupling with interference fit and the shaft.Usually, the spline connection is notInterferenceTherefore, the connected parts need to be fixed axially.The spline is fast, easy and excellent. The spline connection has high bearing capacity and good alignment, but the manufacturing cost is high, so it needs to be processed with special tools.[1]
Usage characteristics
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Spline hob
Due to the difference in structure form and manufacturing process, compared with flat key connection, spline connection has the following characteristics in strength, process and use: because moretoothAnd groove, so the force on spline connection is relatively uniform;Because the groove is shallow, the stress concentration at the tooth root is small, and the strength of the shaft and hub is weakened less;More teeth and larger total contact area can bear larger loads;The parts on the shaft are well aligned with the shaft, which is very important for high-speed and precision machines;Good guidance, which is very important for dynamic connection;Grinding can be used to improve machining accuracy and connection quality;The manufacturing process is complex, and sometimes special equipment is required, which is high in cost.Applicable occasions: high centering accuracy and transmissiontorqueLarge or oftenslippageJoin of.[1]
Spline drawing
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Splined connection[3]
In mechanical drawing, the drawing of spline teeth is rather tedious.In order to improve the drawing efficiency, many countries have formulated spline drawing standards, and the international community has also formulatedISO Standards。According to the national standard of Chinese mechanical drawing, for rectangular splines, in the view of the projection plane parallel to the axis, the major diameter is drawn with thick solid lines, and the minor diameter is drawn with thin solid lines, and part or all of the tooth shape is drawn with a section;In the sectional view of the projection plane parallel to the axis of the internal spline, the major diameter and minor diameter are drawn with thick solid lines, and part or all of the tooth shape is drawn with the local view (Figure 1 [Drawing of rectangular spline]).The end of the working length of the spline and the end of the tail length are drawn with thin solid lines.aboutInvolute splineThe drawing method is basically the same as that of rectangular spline, but the dividing circle and dividing line need to be drawn with dotted lines[1]
11 GB/T1592.3-2008 Agricultural Tractors - Rear PTO Shaft Types 1, 2 and 3 - Part 3: PTO Shaft Dimensions and Spline Dimensions, PTO Shaft Position 2009-02-01 Implemented instead of GB/T 1592-2003
12 GB/T5104-2008 Basic Types and Dimensions of Involute Spline Hobs Implemented on March 1, 2009
13 GB/T3478.5-2008 Cylindrical Straight Involute Splines (Metric Modulus Tooth Side Fit) Part 5: Inspection Implemented on May 1, 2009, instead of GB/T 3478.5-1995
14 GB/T3478.1-2008 Cylindrical Straight Involute Splines (Metric Modulus Tooth Side Fit) Part 1: General Implementation 2009-05-01, replacing GB/T 3478.1-1995
15 GB/T3478.4-2008 Cylindrical Straight Involute Splines (Metric Modulus Tooth Side Fit) Part 4: 45 ° Pressure Angle Dimension Table 2009-05-01 Implemented instead of GB/T 3478.4-1995
16 GB/T3478.3-2008 Cylindrical Straight Involute Splines (Metric Modulus Tooth Side Fit) Part 3: 37.5 ° Pressure Angle Dimension Table 2009-05-01 Implemented instead of GB/T 3478.3-1995
17 GB/T3478.6-2008 Cylindrical Straight Involute Splines (Metric Modulus Tooth Side Fit) Part 6: 30 ° Pressure Angle M and W Values 2009-05-01 Implemented instead of GB/T 3478.6-1995
18 GB/T3478.9-2008 Cylindrical Straight Involute Splines (Metric Modulus Tooth Side Fit) Part 9: Implementation of Measuring Bar 2009-05-01, replacing GB/T 3478.9-1995
19 GB/T15758-2008 Basic Terms of Splines Implemented on May 1, 2009, instead of GB/T 15758-1995
20 GB/T3478.2-2008 Cylindrical Straight Involute Splines (Metric Modulus Tooth Side Fit) Part 2: 30 ° Pressure Angle Dimension Table 2009-05-01 Implemented instead of GB/T 3478.2-1995
21 GB/T3478.7-2008 Straight Cylindrical Involute Splines (Metric Modulus Tooth Side Fit) Part 7: 37.5 ° Pressure Angle M and W Values 2009-05-01 Implemented instead of GB/T 3478.7-1995
23 GB/T3478.8-2008 Cylindrical Straight Involute Splines (Metric Modulus Tooth Side Fit) Part 8: 45 ° Pressure Angle M and W Values 2009-05-01 Implemented instead of GB/T 3478.8-1995
24 GB/T24650-2009 Technical Conditions for Spline Shafts of Tractors Implemented on May 1, 2010
25 GB/T24666-2009 Technical Conditions for Agricultural Spline Shafts Implemented on April 1, 2010
