CN200962570Y - An ultra-magnetic telescopic driving device - Google Patents

Abstract

The utility model relates to a giant magnetostrictive driving device, which comprises a pre-compression mechanism (3); ), the boss (303) fixed on the output shaft (7); the end cover (305) is threadedly connected with the housing (1) through the preloading screw (304), and the output shaft (7) passes through the end cover (305) The hole is slidingly fitted, and the preload spring (302) is sleeved on the output shaft (7) between the boss (303) and the end cover (305). In the utility model, the pre-pressing mechanism is arranged outside the shell, and the installation of the pre-pressing mechanism and the adjustment of the pre-pressing strength are all carried out through the operation of the pre-pressing screw, and the pre-pressing screw does not directly act on the output shaft, so when the pre-pressing screw is adjusted , the preloading screw will not drive the output shaft to rotate, so the output shaft will not cause wear to the giant magnetostrictive rod, which improves the working stability of the telescopic drive device and facilitates the installation of the pressure sensor.

Description

A giant magnetostrictive drive device

technical field

The utility model relates to a micro-motion actuator, in particular to a giant magnetostrictive drive device.

Background technique

The giant magnetostrictive driving device is a new generation of telescopic driving device designed by applying the Joule effect. Traditional electromagnetic telescopic actuators have small expansion and contraction, small output force, slow response, high-voltage drive, and complicated design. The giant magnetostrictive precision drive device can not only overcome the above-mentioned shortcomings of electromagnetic telescopic actuators, but also The /machine conversion efficiency has advantages that other materials cannot match, and has broad application prospects in precision valves, precision flow control, CNC machine tools, and feed systems of precision machine tools.

As shown in FIG. 2 , the existing giant magnetostrictive driving device includes a housing 1 , a giant magnetostrictive rod 6 , an output shaft 7 , a bobbin 5 , a coil 4 wound on the bobbin, a water cooling mechanism 2 and the like. The giant magnetostrictive rod 6 is arranged in the casing 1 , the bobbin 5 is sleeved on the giant magnetostrictive rod 6 , and the upper end of the giant magnetostrictive rod 6 is pushed against the lower end of the output shaft 7 .

In order to make the giant magnetostrictive driving device more accurate, the output shaft 7 needs a certain pressure to be pressed on the upper end of the giant magnetostrictive rod 6. Therefore, a pre-compression mechanism 3 is also provided in the giant magnetostrictive driving device.

In the existing giant magnetostrictive driving device, its preloading mechanism 3 is arranged in the housing 1, and the preloading mechanism 3 includes a preloading nut 301, a preloading spring 302, and a boss 303 fixed on the output shaft 7 from top to bottom. . The preload nut 301 is threadedly fitted with the housing 1 , and the output shaft 7 is slidingly matched with the inner through hole of the preload nut 301 ; the preload spring 302 is sleeved on the output shaft 7 between the boss 303 and the preload nut 301 . The pressure of the preload spring 302 presses the output shaft 7 on the giant magnetostrictive rod (6).

The defects of the existing giant magnetostrictive driving device are: 1. The output shaft 7 is in close contact with the preload nut 301. When installing and adjusting the preload strength, it is easy to drive the output shaft 7 to rotate together with the preload nut 301, and the rotating The output shaft 7 is very easy to wear the contact surface between the giant magnetostrictive rod 6 and the output shaft 7, which affects the working stability of the telescopic drive device. 2. The preloading mechanism is arranged in the casing 1, which is not conducive to installing a pressure sensor for measuring the preloading force.

Contents of the invention

The technical problem to be solved by the utility model is: to provide a giant magnetostrictive driving device, which is easy to install and debug, has good working stability, and can also provide convenience for the installation of the pressure sensor.

The technical solution adopted by the utility model to solve the problems of the technologies described above is:

A giant magnetostrictive driving device, which includes a housing, a giant magnetostrictive rod, an output shaft, and a preloading mechanism; the preloading mechanism presses the lower end of the output shaft on the upper end of the giant magnetostrictive rod; the preloading mechanism includes The end cover of the preload mechanism, the preload screw, the preload spring, and the boss fixed on the output shaft; On the output shaft between the boss and the end cover.

In the above solution, the upper end of the housing protrudes, and the lower end of the end cap is sleeved on the protrusion of the housing.

Compared with the prior art, the utility model giant magnetostrictive driving device has the following advantages:

1. Set the preloading mechanism outside the shell. The installation of the preloading mechanism and the adjustment of the preloading strength are carried out through the operation of the preloading screw. The preloading screw does not directly act on the output shaft, so when adjusting the preloading screw, The preloading screw does not drive the output shaft to rotate, so the output shaft does not cause wear to the giant magnetostrictive rod, which improves the working stability of the telescopic drive device.

2. The pre-pressing mechanism is external, which is convenient for the installation of the pressure sensor.

3. The lower end of the end cover is set on the protrusion of the housing, which is beneficial to the positioning of the end cover and the housing, and the integrity of the giant magnetostrictive driving device is good.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the giant magnetostrictive driving device of the present invention

Fig. 2 is the structural representation of existing giant magnetostrictive driving device

Detailed ways

As shown in Figure 1, the embodiment of the giant magnetostrictive driving device of the present utility model includes a housing 1, a giant magnetostrictive rod 6, an output shaft 7, a preloading mechanism 3, a water cooling mechanism 2, a coil skeleton 5, a winding wire Coil 4 etc. on the ring skeleton. The giant magnetostrictive rod 6 is arranged in the casing 1 , the bobbin 5 is sleeved on the giant magnetostrictive rod 6 , and the preloading mechanism 3 presses the lower end of the output shaft 7 against the upper end of the giant magnetostrictive rod 6 . The preloading mechanism 3 includes a preloading mechanism end cover 305, a preloading screw 304, a preloading spring 302, and a boss 303 fixed on the output shaft 7; of the bulge. The end cover 305 is threadedly connected with the housing 1 through the preloading screw 304 , the output shaft 7 is slidably fitted through the through hole of the end cover 305 , and the preloading spring 302 is sleeved on the output shaft 7 between the boss 303 and the end cover 305 .

In this embodiment, there are two preloading screws 304. During the adjustment process, the imbalance between the two sides of the end cover 305 can be avoided, and the center of the output shaft 7 of the driving device can be guaranteed to be symmetrical.

Claims (2)

1, a kind of giant magnetostrictive driving device, it comprises housing (1), giant magnetostrictive rod (6), output shaft (7), preloading mechanism (3); Preloading mechanism (3) outputs shaft The lower end of (7) is pressed on the upper end of giant magnetostrictive rod (6); It is characterized in that: preload mechanism (3) comprises preload mechanism end cover (305), preload screw rod (304), preload spring ( 302), the boss (303) that is fixed on the output shaft (7); the end cover (305) is threadedly connected with the housing (1) through the preloading screw rod (304), and the output shaft (7) is connected from the end cover (305) The through hole is slidingly fitted, and the preload spring (302) is sleeved on the output shaft (7) between the boss (303) and the end cover (305). 2. The giant magnetostrictive driving device according to claim 1, the upper end of the housing (1) protrudes, and the lower end of the end cover (305) is sleeved on the protrusion of the housing (1).

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