阅读说明：本技术 一种滚珠丝杠传动磨损补偿形状记忆合金执行机构 (Ball screw transmission wear compensation shape memory alloy actuating mechanism ) 是由 姜洪奎 宋米佳 田博丞 周亮 于 2019-12-11 设计创作，主要内容包括：一种滚珠丝杠传动磨损补偿形状记忆合金执行机构,属于滚珠丝杠制造领域,一种滚珠丝杠传动磨损补偿形状记忆合金执行机构,是由键槽、形状记忆合金驱动器、锁紧环、发热元件、锁紧环外壳、形状记忆合金孔、发热板和加热线圈组成的,其特征在于,所述的形状记忆合金驱动器安装在锁紧环上,发热元件安装在锁紧环外部,该发明的有益之处是,本机构能够补偿由于磨损而导致的定位精度损失,减少维护,延长使用寿命和提高工件质量,不会对组件设计进行重大更改,从而为制造商带来更高的利润。(The invention discloses a ball screw transmission wear compensation shape memory alloy actuating mechanism, which belongs to the field of ball screw manufacturing and comprises a key slot, a shape memory alloy driver, a locking ring, a heating element, a locking ring shell, a shape memory alloy hole, a heating plate and a heating coil.)

1. The utility model provides a ball screw transmission wearing and tearing compensation shape memory alloy actuating mechanism, is by shape memory alloy driver, locking ring, heating element constitution, its characterized in that: the shape memory alloy driver is arranged on the locking ring, and the heating element is arranged outside the locking ring.

2. The ball screw wear compensating shape memory alloy actuator of claim 1, wherein the locking ring is comprised of a locking ring housing, key slots in the locking ring housing, and shape memory alloy drive holes evenly distributed in the locking ring housing.

3. The ball screw driven wear compensating shape memory alloy actuator of claim 1, wherein the heating element is comprised of a heating coil and a heating plate, the heating coil being uniformly wound around the heating plate.

Technical Field

The invention relates to a ball screw transmission abrasion compensation shape memory alloy actuating mechanism, in particular to a ball screw transmission abrasion compensation shape memory alloy actuating mechanism adopting the shape memory effect design of shape memory alloy, belonging to the ball screw manufacturing field.

Background

The ball screw pair has the functions of high efficiency, energy conservation, precise positioning, precise guiding, quick response, high speed, synchronism, reversibility and the like of transmission, is an irreplaceable key matching part of a numerical control machine tool and a mechanical and electrical integration product, and is an indispensable basic part for developing equipment industry and improving national defense and national comprehensive economic strength. Many solutions to varying the preload of a ball screw drive have been proposed, some of which focus on mechanisms that can readjust the preload without disassembling the ball screw, such as expansion bolts, differential rings or worm drives, in addition to which researchers control the preload by developing actuators to improve the method or compensate for the preload displacement due to thermal loads for compensating for the thermal expansion due to friction and thereby dynamically vary the preload of the ball screw drive, the aforementioned systems either requiring access to purely mechanical adjustment mechanisms of the ball screw drive or rather complex and cost-intensive active systems, none of the currently known active systems being specifically designed for active wear compensation, which can compensate for the loss of positioning accuracy due to wear, reduce maintenance, extend service life and improve workpiece quality, the design of the assembly is not changed greatly, the gasket which needs to be provided with specified pretightening force is replaced, and the preloading condition required by regeneration is regenerated, so that higher profit is brought to the manufacturer.

Disclosure of Invention

In view of the above-mentioned deficiencies, the present invention provides a ball screw drive wear compensation shape memory alloy actuator.

The invention is realized by the following technical scheme: a ball screw transmission wear compensation shape memory alloy actuator is composed of a key slot, a shape memory alloy driver, a locking ring, a heating element, a locking ring shell, shape memory alloy holes, a heating plate and a heating coil, wherein the key slot is arranged on the locking ring shell, the shape memory alloy holes are uniformly distributed on the locking ring shell, the heating coil is uniformly wound on the heating plate, the heating element is arranged on the locking ring shell, the shape memory alloy driver is arranged on the shape memory alloy holes, in the device, in operation, a sliding key is arranged on the key slot 1 to keep alignment and preloading, the heating coil is electrified to generate heat, the temperature of the heating element rises, the temperature around the actuator rises, the shape memory alloy driver is activated, the shape memory alloy driver expands and closes a gap between an actuator and a nut to generate force and resist the rigidity generated by the ball screw transmission, until it reaches its maximum travel, the heating coil is de-energized, the temperature drops, and the shape memory alloy driver cools and transitions back to its original state.

The invention has the advantages that the mechanism can compensate the loss of positioning precision caused by abrasion, reduce maintenance, prolong service life and improve workpiece quality, is arranged between the flange nut and the countersunk nut, replaces a gasket which needs to be provided with specified pretightening force, does not change the design of the component significantly by regenerating the required preloading condition, and brings higher profit for manufacturers.

Drawings

Figure 1 is a schematic structural view of the present invention,

figure 2 is a cross-sectional view of the present invention,

figure 3 is a cross-sectional view of a locking ring of the present invention,

figure 4 is a schematic view of the locking ring structure of the present invention,

figure 5 is a schematic structural view of a heating element of the present invention,

in the figure, 1, a key groove, 2, a shape memory alloy driver, 3, a locking ring, 4, a heating element, 301, a locking ring shell, 302, a shape memory alloy hole, 401, a heating plate, 402 and a heating coil.

Detailed Description

A ball screw transmission wear compensation shape memory alloy actuator is composed of a key slot 1, a shape memory alloy driver 2, a locking ring 3, a heating element 4, a locking ring shell 301, shape memory alloy holes 302, a heating plate 401 and a heating coil 402, wherein the key slot 1 is arranged on the locking ring shell 301, the shape memory alloy holes 302 are uniformly distributed on the locking ring shell 301, the heating coil 402 is uniformly wound on the heating plate 401, the heating element 4 is arranged on the locking ring shell 301, and the shape memory alloy driver 2 is arranged on the shape memory alloy holes 302.

When the device works, a sliding key is arranged on a key groove 1 and keeps alignment and preloading, a heating coil 402 is electrified to generate heat, the temperature of a heating element 4 rises, the temperature around an actuating mechanism rises, a shape memory alloy driver 2 is activated, the shape memory alloy driver 2 expands and closes a gap between the actuating mechanism and a nut, force is generated and resists the rigidity generated by the transmission of a ball screw, the heating coil 402 is powered off until the maximum stroke is reached, the temperature is reduced, and the shape memory alloy driver 2 is cooled and converted back to the original state.

It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.