Leaf Ends
The Leaf Ends component provides details about the leaf end types at the front and rear ends. Currently, two types of leaf ends are supported. Other possible options will be slider end.
Figure 1. Leaf Ends Panel in the Leaf Builder
The Leaf Ends section is explained below:
Use the Leaf End Type drop-down menu to define the type of Leaf end:
Figure 2. Available Selections for Leaf Ends
- Spring eye
- Slipper end
Spring Eye
- Type
- Defines the type of spring sye.
Figure 3. Available selections for spring eye- Upturned
Figure 4. - Downturned
Figure 5. - Berliner
Figure 6.
- Upturned
- Inner Radius
- Defines the leaf end radius.
- Eye Position
- Defines either rear or front position of the leaf end.
- Bushing
- By selecting the bushing option, a new option Eye
Bushing is displayed. The Eye Bushing drop-down menu lists
all the bushings that are added in the Bushings Component.
Figure 7. Bushing Selection in Leaf Ends - Spring Eye Location
- Defines the location of the leaf end. Represents the center of the rear eye
hook with respect to either ‘Leaf_Ref_Loc’ or ‘BOLTLOCATION’ depending upon
the shape condition.Note: If the shape Condition is ‘PRE_ASSEMBLY’, the location should be defined with respect to the ‘BOLTLOCATION’ of ‘MASTER’ leaf.
-
Figure 8. Spring Eye Location in Leaf Ends
Slipper End
Another available option for leaf ends which is a step away from traditional spring eyes is slipper ends, where one end of the leaf spring or both ends comprises the open leaf which slides in a ‘bracket’ or ‘hanger’ which is welded to the chassis of the trailer.The top surface of the bracket (contact pad) can have many shapes based on the requirement.
Here you can enter data for a primitive shape such as cylinder, for more refined shapes you will have to replace the primitive slipper bracket graphic with a refined one in MotionView.
Figure 9. Leaf Ends - Slipper End Type
- Slipper Type (Round Surface)
- By default, the round surface type is used. It is a cylindrical pin-based slipper end.
- Leaf Contact Len
- Defines an approximate length along the leaf surface that will make contact with the slipper end. It is centered about the slipper center location.
- Pad Radius
- Defines the radius of the cylindrical slipper end.
- X
- Center X location of the slipper end.
- Z
- Center Z location of the slipper end.
Retaining Pin Details
- Pin Radius
- Defines the radius of the cylindrical pin.
- X
- Center X location of the retaining pin.
- Z
- Center Z location of the retaining pin.
Side Contact Details
- Width
- Length of the bracket along Y direction.
- Height
- Length of the bracket along Z direction.
- Depth
- Length of the bracket along X direction.
Leaf Ends for Leaf Property File (*lpf)
An example of how a Leaf Ends block is represented in a TiemOrbit file format is shown below:$------------------------------------------LEAF_ENDS
[LEAF_ENDS]
FRONT = 'FRONT_EYE_HOOK'
REAR = 'REAR_EYE_HOOK'
- Block Name = ‘LEAF_ENDS’ (Required)
-
Attributes Type Valid Value Required Front String 'Front_Leaf_End’, ‘Front_Eye_Hook’
Yes Rear String 'Rear_Leaf_End’, 'Rear_Eye_Hook'
Yes
Rear Leaf End for Leaf Property File (*lpf)
An example of how a Rear Leaf End block is represented in a TiemOrbit file format is shown below:$-----------------------------------------REAR_LEAF_END
[REAR_LEAF_END]
ENDTYPE = ‘SPRING EYE’
INNERRADIUS = 20.0
LOCATION – [636.027, 0.0, 140.0]
TYPE = ‘UPTURNED’
Note: A
Rear Leaf End block is required only if block name has been defined in the
“Leaf_Ends” block.
- Block Name = ‘Rear_Leaf_End’ (Required)
-
Attributes Type Valid Value Required EndType String 'Spring Eye' 'Slipper End'
Yes Type String ‘Berliner’, ‘upturned’,
‘downTurned’
Yes innerRadius Real - Yes Location List [x,y,z] Optional
Front Leaf End for Leaf Property file (*lpf)
An example of how a Front Leaf End block with Slipper End is represented in a TiemOrbit file format is shown below:$-------------------------------------FRONT_LEAF_END
[FRONT_LEAF_END]
BLOCKNAME = ‘FRONT_LEAF_END’
ENDTYPE = ‘SLIPPER END’
SLIPPERTYPE = ‘ROUND SURFACE’
(PINDATA)
PINCONTACTPROP = ‘METAL_METAL’
PINLOCX = -530.0
PINLOCZ = 110.0
PINRADIUS = 20.0
(SIDECONTACTDATA)
DEPTH = 5.0
HEIGHT = 50.0
SIDECONTACTPROP = ‘METAL_METAL’
WIDTH = 85.0
(SLIPPERDATA)
LEAFCONTACTLEN = 100.0
PADCONTACTPROP = ‘METAL_METAL’
PADLOCX = -530.0
PADLOCZ = 190.0
PADRADIUS = 30.0
Note: A
Front Leaf End block is only required if block name has been defined in the
“Leaf_Ends” block.
- Block Name = ‘Front_Leaf_End’ (Required)
-
Attributes Type Valid Value Required EndType String 'Spring Eye' 'Slipper End'
Yes Slipper Type String 'Round Surface' Yes
Slipper Data for Leaf Property file (*lpf)
- Block Name = ‘Front_Leaf_End’ (Required)
- Sub-Block Name = ‘SLIPPERDATA’ (Required)
-
Attributes Type Valid Value Required Leaf Contact Length Real - Yes Pad Contact Property String 'METAL_METAL' Yes Pad Location X Real - Yes Pad Location Z Real - Yes Pad Radius Real - Yes
Retaining Pin Data for Leaf Property file (*lpf)
- Block Name = ‘Front_Leaf_End’ (Required)
- Sub-Block Name = ‘PINDATA’ (Required)
-
Attributes Type Valid Value Required Pin Contact Property String 'METAL_METAL' Yes Pin Location X Real - Yes Pin Location Z Real - Yes Pin Radius Real - Yes
Retaining Side Contact Data for Leaf Property file (*lpf)
- Block Name = ‘Front_Leaf_End’ (Required)
- Sub-Block Name = ‘SIDECONTACTDATA’ (Required)
-
Attributes Type Valid Value Required Side Contact Property String 'METAL_METAL' Yes Width Real - Yes Height Real - Yes Depth Real - Yes