An electric linear feed unit and its assembly method
A linear feed and electric technology, applied in the direction of assembly machines, feeding devices, metal processing equipment, etc., can solve the problems of large screw rotation inertia force, lower equipment working accuracy, heat deformation and energy consumption, etc., to improve the drive nut. The effect of speed improvement, transmission efficiency improvement, vibration and noise reduction
Active Publication Date: 2018-01-02
SHANDONG UNIV
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Problems solved by technology
The screw speed of the conventional screw-driven ball screw pair is limited to the critical speed of the feed system resonance, which is difficult to increase, especially the long screw used for large, heavy-duty high-end CNC machine tools, its own weight is much larger than that of the nut, and the screw rotates The inertial force is very large, which leads to heat generation, deformation and serious energy consumption. The deformed screw will generate vibration and noise during the rotation process, which reduces the working accuracy of the equipment.
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[0030] The present invention will be further described below in conjunction with accompanying drawing of description and specific embodiment:
[0031] Such as figure 1 , figure 2 and image 3 As shown, an electric linear feed unit, its structure includes: lead screw 1, frameless motor 2, supporting plate 3, nut sleeve 4, first fastening screw 5, left bearing end cover 6, left felt ring 7, Left bearing 8, sleeve 9, right bearing 10, right bearing end cover 11, second fastening screw 12, drive nut 13, right felt ring 14, third fastening screw 15, etc.
[0032] The frameless motor 2 is a hollow shaft brushless motor, which is composed of a hollow rotor, a stator and a phase sequence controller. The hollow rotor is in the shape of a sleeve, the outer surface of the hollow rotor is evenly distributed with magnetic steel bars, and there is a proper gap between the inner surface of the hollow rotor and the ball screw.
[0033] Such as Figure 5 As shown, the driving nut 13 is a...
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The invention discloses an electric linear feeding unit and an assembling method thereof and belongs to the field of electromechanical numerical control devices and application. The electric linear feeding unit structurally comprises a screw, a motor and a driving nut. A rotor of the motor is a hollow rotor in a sleeve shape, the hollow rotor is arranged on the screw in a sleeving mode, and the driving nut is meshed with the screw. The driving nut is fixedly connected with the hollow rotor, and the hollow rotor drives the driving nut to rotate so that the driving nut can drive the motor to linearly move along the screw. In the assembling process, the driving nut is installed on the screw first, and then the driving nut and the hollow rotor of the motor are connected. According to the electric linear feeding unit and the assembling method thereof, by means of the design of integrating the frameless motor and a nut driving type ball screw pair, the structure is compact, the problems of heat emitting, deformation and serious energy loss caused by screw rotation inertia force in the rotating process of a traditional screw are solved, vibration and noise are effectively reduced, the working precision of equipment is improved, and the transmission efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of electromechanical numerical control equipment and its application, in particular to an electric linear feed unit and an assembly method thereof. Background technique [0002] The ball screw pair is currently widely used in CNC equipment as a feed transmission mechanism. When used, the screw usually rotates as the main drive to drive the ball nut, and converts the rotational motion into a linear motion along the axis of the screw, thereby driving the work. Table linear feed, which is often referred to as the screw-driven ball screw pair. The screw speed of the conventional screw-driven ball screw pair is limited to the critical speed of the feed system resonance, which is difficult to increase, especially the long screw used for large, heavy-duty high-end CNC machine tools, its own weight is much larger than that of the nut, and the screw rotates The inertial force is very large, which leads to heat gener...
Claims
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IPC IPC(8): B23Q5/40B23P21/00
CPCB23P21/00B23Q5/402
Inventor 冯显英李慧李沛刚
Owner SHANDONG UNIV