Linear actuator and method of making a linear actuator
First Claim
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1. A linear actuator comprising:
- an electric motor and a transmission,a spindle connected with the electric motor and the transmission for rotating the spindle,a nut which by the rotation of the spindle can be displaced along the spindle,an expelling rod in the nature of a tube, one end of which is mounted to the nut and surrounding at least a length of the spindle,wherein said nut is made of an elastomeric material and joined to the expelling rod by intermeshing embossing on at least a part of the outer surface of the nut and at least a part of the interior surface of the expelling rod for the transfer of axial forces as well as torques.
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Abstract
A linear actuator includes a driven spindle (10) of metal having a nut (12) of polymeric material which further is connected to the expelling rod (14) of the actuator. The nut and expelling rod are joined to each other by intermeshing embossing mate for contemporary transfer of axial forces and torques. With a polymeric nut a number of advantages are obtained such as low friction, lifetime lubrication, low noise level, low production and maintenance costs. Furthermore, a possibility is provided for in a simple manner to provide the actuator with a safety nut connected to the main nut (12) with breakable entrainment means.
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Citations
11 Claims
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1. A linear actuator comprising:
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an electric motor and a transmission, a spindle connected with the electric motor and the transmission for rotating the spindle, a nut which by the rotation of the spindle can be displaced along the spindle, an expelling rod in the nature of a tube, one end of which is mounted to the nut and surrounding at least a length of the spindle, wherein said nut is made of an elastomeric material and joined to the expelling rod by intermeshing embossing on at least a part of the outer surface of the nut and at least a part of the interior surface of the expelling rod for the transfer of axial forces as well as torques. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification