Linear actuator assembly
First Claim
1. An electric linear displacement motor for use in a testing apparatus, the electric linear displacement motor comprising:
- a stator assembly comprising;
a stator housing having a first end and a second end and a through bore extending from the first end to the second end; and
a plurality of coils within the stator housing;
an armature positioned within the stator housing and having a first end and a second end and wherein the armature includes a plurality of magnets along a length of the armature and moves along a longitudinal axis;
a bearing assembly attached to the first end of the stator housing, the bearing assembly comprising;
a bearing housing configured to be attached to the first end of the stator housing; and
a bearing positioned within the bearing housing and wherein the first end of the armature engages and is carried by the bearing; and
a brake assembly coupled to the first end of the armature and the bearing housing, the brake assembly comprising;
a moving portion fixed to the armature; and
a non-moving portion fixed to the bearing housing wherein the moving portion has less mass than the non-moving portion and therefore reduces a moving mass of the armature, andwherein the non-moving portion comprises a caliper comprising;
a first plate; and
a second plate spaced from the first plate and creating a gap therebetween when the caliper is energized and where the plates move toward a clamping position when there is no power supplied to the caliper.
3 Assignments
0 Petitions
Accused Products
Abstract
An electric linear displacement motor for use in a testing apparatus includes a stator assembly having a stator housing and a plurality of coils within the stator housing. An armature is positioned within the stator housing and includes a plurality of magnets along a length of the armature. A bearing assembly is attached to the first end of the stator housing and includes a bearing housing containing a bearing. A first end portion of the armature engages and is carried by the bearing. A brake assembly is coupled to the first end of the armature and the bearing housing. The brake assembly includes a moving portion coupled to the armature and a non-moving portion coupled to the bearing housing wherein the moving portion has less mass than the non-moving portion and therefore reduces the moving mass of the armature.
80 Citations
15 Claims
-
1. An electric linear displacement motor for use in a testing apparatus, the electric linear displacement motor comprising:
-
a stator assembly comprising; a stator housing having a first end and a second end and a through bore extending from the first end to the second end; and a plurality of coils within the stator housing; an armature positioned within the stator housing and having a first end and a second end and wherein the armature includes a plurality of magnets along a length of the armature and moves along a longitudinal axis; a bearing assembly attached to the first end of the stator housing, the bearing assembly comprising; a bearing housing configured to be attached to the first end of the stator housing; and a bearing positioned within the bearing housing and wherein the first end of the armature engages and is carried by the bearing; and a brake assembly coupled to the first end of the armature and the bearing housing, the brake assembly comprising; a moving portion fixed to the armature; and a non-moving portion fixed to the bearing housing wherein the moving portion has less mass than the non-moving portion and therefore reduces a moving mass of the armature, and wherein the non-moving portion comprises a caliper comprising; a first plate; and a second plate spaced from the first plate and creating a gap therebetween when the caliper is energized and where the plates move toward a clamping position when there is no power supplied to the caliper. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A testing apparatus comprising:
-
a base; spaced apart support arms supported by the base; a crosshead movable on the spaced apart support arms and configured to be retained in a selected position; an electric linear displacement motor supported by the crosshead, the electric linear displacement motor comprising; a stator assembly comprising; a stator housing having a first end and a second end and a through bore extending from the first end to the second end; and a plurality of coils within the stator housing; an armature positioned through the through bore in the stator housing having a first end and a second end and wherein the armature includes a plurality of magnets along a length of the armature and moves along a longitudinal axis; a bearing assembly attached to the first end of the stator housing, the bearing assembly comprising; a bearing housing configured to be attached to the first end of the stator housing; and a bearing positioned within the bearing housing and wherein the first end of the armature engages and is carried by the bearing; a mounting bracket attached to the first end of the armature; a brake assembly coupled to the mounting bracket and the bearing housing, the brake assembly comprising; a moving portion fixed to the mounting bracket; and a non-moving portion fixed to the bearing housing wherein the moving portion has less mass than the non-moving portion and therefore reduces a moving mass of the armature; and an anti-rotation assembly configured to prevent rotation of the armature, the anti-rotation assembly comprising; a moving portion fixed to the mounting bracket; and a non-moving portion fixed to the bearing housing; and wherein the non-moving portion of the braking assembly comprises a caliper comprising; a first plate; a second plate spaced from the first plate and creating a gap therebetween when the caliper is energized and where the plates move toward a clamping position when there is no power supplied to the caliper. - View Dependent Claims (12, 13, 14, 15)
-
Specification