Lever Arm System

Lever Arm System

Create a sketch on the front plane, and draw a circle with diameter 25.5mm

Extrude out the base sketch to 302mm.[Boss-Extrude1]

Create a new sketch on the top of the extruded circle, and use convert entities to create the same shape as the base sketch. Extrude it to 152mm [Boss-Extrude2]

Create a new sketch at the bottom of the extruded circle, and use convert entities to get the same shape.Then extrude it to 130mm. [Boss-Extrude3]

On the front plane of the extruded circle, create a new sketch and draw two circles with diameter 8 mm. The distance between their origins is 116 mm. The center point of the circle from the edge is 15mm. Please see the image.

Extrude cut above sketch, cutting them to 20 mm in both direction. [Cut-Extrude4]

Create a circle on the front plane, diameter 17.78 mm. In addition, create a centerline the is tangent to the left arc of the circle. Set the distance from the origin and the centerline to be 302mm.

Extrude cut the circle to 15.2 mm.[Cut-Extrude 1]

Create a new circle at front, diameter 8 mm.

Extrude cut the circle created above to 20mm.[Cut-Extrude2]

Create a new sketch on top, and draw a circle diameter 21.18mm, centered at the origin.

Finally, extrude cut the sketch to 734 mm. [Cut-Extrude3]

Then, you will get the resulting part.

Create a new sketch on the front plane, and draw two concentric circles.( One is 26.5 mm and another is 35mm)

Extrude out the base sketch to 34 mm.[Boss-Extrude1]

Create a new sketch on top of the extruded circle, and draw two circles.(One diameter is 12.5 mm, and another is 32 mm). Then extrude the region to 4mm. [Boss-Extrude2]

Extrude cut the same sketch of the outer region to 6mm. [Cut-Extrude1]

Create a new sketch at the bottom, and draw a circle with diameter 93mm,centered at the origin. Then Extrude out to 6 mm. [Boss-Extrude 3]

Create another new sketch at the same place above. Draw a circle with diameter 80 mm. Then use convert entity , covering the 26.5 circle into this surface.

Extrude cut the region converting region to 10mm. [Cut-Extrude 2]

Create a new sketch at the largest circle (80mm), and draw a circle with diameter 26 mm. Use Extrude cut the sketch region to 5mm [Boss-Extrude 9]

Create another circle at top diameter 22.5 mm. Extrude cut to 5mm. [Cut-Extrude3]

The resulting part.

Create a sketch on the front plane, and draw two circles, centered at the origin.(One with diameter 81.5mm ,another is 101.25mm)

Extrude out the sketch region to 21 mm. [Boss-Extrude1]

Create a new sketch on the front plane, and draw a circle with diameter 94 mm. Then extrude out to 50 mm. [Boss-Extrude2]

Create a new sketch on the top plane, and draw a circle with diameter 25.4. Create two construction lines to define its location.

Cutting through the sketch region using Extrude Cut. [Cut-Extrude1]

Create a new sketch on the front plane, and draw two circles, centered at the origin.(One with diameter 95mm, another is 37mm).

Finally, extrude out the sketch plane to 2.5mm.[Boss-Extrude3]

The resulting part.

Create a new sketch on the front plane, and draw two circles, centered at the origin. (One with diameter 77mm, and another with diameter 35.5 mm)

Extrude out the base sketch to 4.3mm [ Boss-Extrude_whole]

The resulting part.

Create a new sketch on the front plane, and draw two concentric circles, centered at the origin. (Larger one with diameter 23 mm, and smaller one with diameter 13mm)

Extrude out to 18.5 mm.[Boss-Extrude1]

Create a new sketch at top of the extruded circle, and draw a circle with diameter 13mm, centered at the origin. Extrude cut the circle to 30 mm. [ Cut-Extrude1]

The resulting part.

Insert the parts into a new assembly. ( Lever arm ring, Ball bearing ring , two socket head cap screw [part number: 93235A355 in Master Carr], BallBearing[part number: 5972K503 in Master Carr, Lever arm, adaptor, Stainless steel nut[part number:94777A102 in Master Carr] , Handle Adaptor)

Create a coincident mate between lever arm’s face and ball bearing’s face.[Coincident8]

Create a concentric mate between the edge of lever arm ring and the edge of ballbearing ring. [Concentric7]

Create a parallel mate between the front plane of lever arm ring and the front plane of Ballbearing ring. [Parallel9]

Create a concentric mate between the face of Ballbearing ring and the face of Ballbearing, and select the lock rotation. [Concentric 1]

Create a coincident mate between the face of lever arm ring and the face of ball bearing. [Coincident 1]

Create a concentric mate between lever arm ring and the lever arm, so that the lever arm can go through the lever arm ring, and locking the rotation.[Concentric 2]

Create a concentric mate between the screw and the lever arm’s hole, and lock the rotation, [Concentric 3]

Create a tangent mate between the socket screw and the lever arm. [ Tangent1]

Repeat step 8 and step 9, creating concentric mate and tangent mate between the screw and the lever arm’s hole. [Concentric 7 & Tangent 3]

Create a concentric mate between edges of lever arm and the edges adapter. [Concentric 9]

Create a concentric mate between screw and the nut and then lock rotation. [Concentric 12]

Create a tangent mate between the lever arm and the nut. [Tangent 15]

Repeat the step 12 and step 12, creating a concentric mate and tangent mate between the screw and the lever arm’s hole. [Concentric 13 & Tangent 16]

Create a tangent mate between the face of lever arm ring and the edge nut. [Tangent 17]

Select reference geometry, and click Axis. Create a coincident mate between the axis of the lever arm and the axis of adapter. [Coincident 6]

Create three Concentric mates between lever arm and handle adaptor. [Concentric 14 & Concentric 15&Concentric 17]

The resulting assembly.