Closed servo electric cylinder
A servo electric cylinder and closed technology, applied in the field of servo electric cylinders, can solve the problems of ball screw lubrication, increase fault points, complex structure, etc., achieve good lubrication effect, reduce fault points, and reduce costs
Pending Publication Date: 2020-06-19
济南东测试验机技术有限公司
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Problems solved by technology
In addition, when repeated high-frequency movements, grease lubrication will cause insufficient local lubrication due to the repeated movement of the ball screw nut at the same position of the ball screw, resulting in problems with the lubrication of the ball screw and affecting the life of the ball screw
[0003] The existing oil-lubricated electric cylinders are all open, that is, the external lubricating pump station is used to continuously inject lubricating oil into the electric cylinder. The disadvantage of this method is that the structure is complex, the cost is high, and the failure points are increased, which is easy to cause oil The lubricating electric cylinder fails due to a problem with the lubricating oil circuit
[0004] For the closed servo electric cylinder, the front chamber and the middle chamber are not connected, so the hydraulic oil cannot move in the chamber. When the servo electric cylinder moves, the lubricating oil can only pass through the gap of the ball screw in the front. The movement between the upper chamber and the middle chamber will cause the pressure of the hydraulic oil in the chamber to be too high, causing the leakage of lubricating oil
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[0019] The following will refer to the attached Figure 1-2 Exemplary embodiments of the present disclosure are described in more detail. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0020] In describing the invention, it is to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", " The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention, rather than...
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In order to solve the problems that an existing open type servo electric cylinder has high cost of a lubricating oil way, and faults are prone to occurrence, the invention provides a closed servo electric cylinder. The closed servo electric cylinder comprises a servo motor, a cylinder barrel, a rear end cover fixedly connected to a rear end of the cylinder barrel, a lead screw, a piston and a piston rod. The piston is connected with the lead screw through a nut; a rear cavity is formed between the rear end cover and the rear end of the cylinder barrel; a middle cavity is formed between the cylinder barrel and a rear end of the piston; a front cavity is formed between a front end of the piston and a front end of the cylinder barrel. The closed servo electric cylinder is characterized in that the piston and the nut are provided with a first oil through hole used for communicating the middle cavity with the front cavity, the rear end cover is provided with a second oil through hole, the front cavity, the middle cavity and the rear cavity are communicated, lubricating oil can flow through the oil through holes, and lubricating oil leakage caused by too large pressure of the inner cavity is avoided.
Description
technical field [0001] The invention relates to the technical field of servo electric cylinders, in particular to a closed servo electric cylinder. Background technique [0002] The ball screw in the servo electric cylinder has two lubrication methods, oil lubrication and grease lubrication. Generally speaking, grease lubrication is less frequent and more convenient. But at high speed, grease lubrication is not as good as oil lubrication, oil lubrication is worse than grease lubrication, lubrication is sufficient, and the temperature rise of the ball screw is very small. In addition, when repeated high-frequency movements, grease lubrication will cause insufficient local lubrication because the ball screw nut repeatedly moves at the same position of the ball screw, which will cause problems with the lubrication of the ball screw and affect the life of the ball screw. [0003] The existing oil-lubricated electric cylinders are all open, that is, the external lubricating pum...
Claims
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IPC IPC(8): H02K7/116H02K5/04F16H57/04
CPCH02K7/116H02K5/04F16H57/04
Inventor 庞国栋姜昆王旭东
Owner 济南东测试验机技术有限公司