CN204538883U - A kind of LVDT formula electromechanical actuator - Google Patents
A kind of LVDT formula electromechanical actuator Download PDFInfo
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- CN204538883U CN204538883U CN201520118532.5U CN201520118532U CN204538883U CN 204538883 U CN204538883 U CN 204538883U CN 201520118532 U CN201520118532 U CN 201520118532U CN 204538883 U CN204538883 U CN 204538883U
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Abstract
The utility model provides a kind of LVDT formula electromechanical actuator.This LVDT formula electromechanical actuator comprises: actuator housing, be arranged at ball screw assembly, in actuator housing and LVDT; Ball screw assembly, comprises ball-screw and feed screw nut; The iron core that LVDT comprises LVDT housing and can move axially along LVDT housing at LVDT housing; Wherein LVDT housing is fixedly installed on the inwall of actuator housing, and extends along the axis of described actuator housing, and described LVDT housing is to axially directed along described actuator housing of described feed screw nut.According to LVDT formula electromechanical actuator of the present utility model, LVDT is fixedly installed on the inwall of actuator housing, the iron core of LVDT and the centre-to-centre spacing of ball-screw can be reduced, effectively improve the rigidity of structure and the stability of this LVDT formula electromechanical actuator.
Description
Technical field
The utility model relates to actuator field, in particular to a kind of LVDT formula electromechanical actuator.
Background technology
Electromechanical coupling system is the important flight control mechanism being applied to aerospace craft, and the development of electromechanical servo system is rapid, and obtained the checking of a lot of examples of many successful, due to the superiority that electromechanical servo is natural, the development prospect of electromechanical servo can be openr from now on.
Electromechanical coupling system mainly comprises servomotor and transmission mechanism etc.Wherein transmission mechanism is mainly used in bearing load, carry-over moment.In current servo transmission mechanism, being most widely used of ball-screw, ball-screw is rectilinear motion by convert rotational motion, and LVDT formula electromechanical actuator wherein just must be relied on to realize the conversion of this motion.
LVDT (Linear Variable Differential Transformer) is linear variable difference transformer, belongs to linear displacement transducer, has generally been applied in space industry electromechanical actuator linear movement measuring at present.The main mounting means of current LVDT is built in leading screw or is bundled in actuator hull outside.And LVDT is built in, and the mode of leading screw is installed, difficulty of processing is larger, and limited with the diameter of axle in leading screw; The mode being bundled in actuator hull outside can cause LVDT and leading screw centre-to-centre spacing comparatively large, affects rigidity and the stability of structure.
Utility model content
The utility model aims to provide a kind of LVDT formula electromechanical actuator, causes to solve in prior art LVDT to be built in leading screw or to be bundled in outside actuator housing the technical problem that the electromechanical actuator rigidity of structure and stability are not strong.
The utility model provides a kind of LVDT formula electromechanical actuator, comprising: actuator housing; Ball screw assembly, comprises ball-screw and feed screw nut, and ball screw assembly, is arranged in actuator housing; LVDT, comprises LVDT housing and can along the iron core that LVDT housing moves axially in LVDT housing; Wherein LVDT housing is fixedly installed on the inwall of actuator housing, and extends along the axis of actuator housing, and LVDT housing is to axially directed along actuator housing of feed screw nut.
Further, the periphery wall of feed screw nut is provided with the guiding mechanism coordinated with LVDT housing.
Further, guiding mechanism comprises the periphery wall that is arranged on feed screw nut and two parallel with the radial transmission line of feed screw nut joint pins, and two rolling bearings be sheathed on respectively on joint pin, lead in the both sides rolling with the side of LVDT housing that two rolling bearings are positioned at LVDT housing.
Further, guiding mechanism also comprises the shaft block ring for fixing rolling bearing.
Further, LVDT formula electromechanical actuator comprises the end cap of the end being fixed on actuator housing.
Further, LVDT formula electromechanical actuator also comprises operating bar, and operating bar comprises the stiff end be fixedly connected with feed screw nut and the external part stretching out end cap.
Further, end cap is stretched out in one end of iron core, and is connected by connecting rod with the external part of operating bar.
Further, operating bar is socketed in the periphery wall of feed screw nut.
Further, the periphery wall of operating bar is provided with support ring.
Further, the outer wall of actuator housing is fixedly installed electric connector, and electric connector is electrically connected with LVDT.
According to LVDT formula electromechanical actuator of the present utility model, LVDT is fixedly installed on the inwall of actuator housing, the iron core of LVDT and the centre-to-centre spacing of ball-screw can be reduced, effectively improve the rigidity of structure and the stability of this LVDT formula electromechanical actuator.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of LVDT formula electromechanical actuator of the present utility model;
Fig. 2 shows the A-A cross-sectional schematic of Fig. 1;
Fig. 3 shows the B-B cross-sectional schematic of Fig. 2.
Marginal data:
10, actuator housing; 21, ball-screw; 23, feed screw nut; 31, LVDT housing; 33, iron core; 41, joint pin; 43, rolling bearing; 45, shaft block ring; 50, end cap; 60, operating bar; 70, connecting rod; 80, support ring; 90, electric connector.
Embodiment
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As shown in Figure 1 to Figure 2, the utility model discloses a kind of LVDT formula electromechanical actuator.This LVDT formula electromechanical actuator comprises: actuator housing 10, be arranged at ball screw assembly, in actuator housing 10 and LVDT; Ball screw assembly, comprises ball-screw 21 and feed screw nut 23; LVDT comprises LVDT housing 31 and can along the iron core 33 that LVDT housing moves axially in LVDT housing; Wherein LVDT housing 31 is fixedly installed on the inwall of actuator housing 10, and extends along the axis of described actuator housing 10, and described LVDT housing 31 is to axially directed along actuator housing 10 of described feed screw nut 23.According to LVDT formula electromechanical actuator of the present utility model, LVDT is fixedly installed on the inwall of actuator housing 10, the iron core 33 of LVDT and the centre-to-centre spacing of ball-screw 21 can be reduced, effectively improve the rigidity of structure and the stability of this LVDT formula electromechanical actuator; And axially directed along actuator housing 10 of LVDT housing 31 pairs of feed screw nuts 23, the certainty of measurement of LVDT can be improved.
Particularly, refer to Fig. 2, actuator housing 10 is in hollow column structure, the inwall of actuator housing 10 has the mounting groove of an installation LVDT, LVDT housing 31 is placed in the mounting groove of actuator housing 10, to facilitate installation, also can reduce the volume of whole actuator simultaneously.LVDT housing 31 extends along the axis of actuator housing 10.In the present embodiment, actuator housing 10 and LVDT housing 31 are fixed by dismountable modes such as bolts; In other implementations, actuator housing 10 and LVDT housing 31 can also be fixed by the mode do not dismantled such as welding.
Ball screw assembly, is placed in actuator housing 10, and ball screw assembly, comprises ball-screw 21, feed screw nut 23 and leading screw steel ball.After ball screw assembly, assembles, should smooth running, there is not the phenomenons such as clamping stagnation, astringent, motion is not smooth.LVDT and ball-screw 21 are all arranged in actuator housing 10, effectively can reduce the centre-to-centre spacing of LVDT and ball-screw 21, effectively improve the rigidity of structure and the stability of this electromechanical actuator; And extend due to the axis of LVDT housing 31 along actuator housing 10, LVDT housing is to axially directed along actuator housing of feed screw nut.
The end cap 50 that LVDT formula electromechanical actuator of the present utility model comprises the end being fixed on actuator housing 10 and the operating bar 60 be fixed on feed screw nut 23.End cap 50 is provided with two through holes, and operating bar 60 comprises the external part of the link be fixedly connected with feed screw nut 23 and one of them through hole stretching out end cap 50.In the present embodiment, the link of operating bar 60 is socketed on the portion perimeter wall of feed screw nut 23, and is bolted; In other implementations, the link of operating bar 60 welds or one-body molded design with feed screw nut 23.The iron core 33 of LVDT is arranged in LVDT housing 31 and also can moves linearly in LVDT housing 31, the iron core 33 of LVDT stretches out another through hole of end cap 50, and the iron core 33 of LVDT is fixedly connected with by connecting rod 70 outside end cap 50 with the external part of operating bar 60, with follow when operating bar 60 feed screw nut 23 do rectilinear motion time, operating bar 60 can drive the iron core 33 of LVDT in LVDT housing 31, to do rectilinear motion, to detect related data.
In order to reduce the friction between the periphery wall of operating bar 60 and actuator housing 10 and LVDT housing 31, the periphery wall of operating bar 60 is provided with multiple support ring 80.In the present embodiment, the periphery wall of operating bar 60 arranges two support rings 80.
The outer wall of actuator housing 10 is fixedly installed electric connector 90, electric connector 90 is electrically connected with LVDT.Particularly, actuator housing 10 has installation through hole, electric connector 90 passes with the connection wire of LVDT and installs through hole.
Incorporated by reference to see Fig. 3, the periphery wall of feed screw nut 23 is provided with the guiding mechanism coordinated with LVDT housing 31.In the present embodiment, guiding mechanism comprises the periphery wall that is arranged on described feed screw nut 23 and two parallel with the radial transmission line of described feed screw nut 23 joint pins 41, and lead in the both sides rolling with the side of described LVDT housing 31 that two rolling bearings, 43, two rolling bearings 43 be sheathed on respectively on joint pin 41 are positioned at described LVDT housing 31.In the present embodiment, the periphery wall of feed screw nut 23 can be polished a part, the periphery wall of feed screw nut 23 is made to comprise arcwall face and plane, from the plane of the periphery wall of feed screw nut 23, two tool joint pins 41 at regular intervals are installed, joint pin 41 adopts with feed screw nut 23 and is threaded, viscose can be applied in the pre-connection, to ensure the firmness after screwed tight.Again two rolling bearings 43 are sheathed on joint pin 41 respectively, between two rolling bearings 43, there is the spacing suitable with the width of LVDT housing 31, lead with the both sides rolling with the side of described LVDT housing 31 making two rolling bearings 43 be positioned at described LVDT housing 31, reduce the overall radial dimension of actuator.Two rolling bearings 43 are fixed respectively by shaft block ring 45 again.Preferably, this rolling bearing 43 is deep groove ball bearing, to reduce friction.
As can be seen from the above description, the utility model the above embodiments achieve following technique effect:
According to LVDT formula electromechanical actuator of the present utility model, LVDT is fixedly installed on the inwall of actuator housing 10, the iron core 33 of LVDT and the centre-to-centre spacing of ball-screw 21 can be reduced, effectively improve the rigidity of structure and the stability of this LVDT formula electromechanical actuator.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a LVDT formula electromechanical actuator, is characterized in that, comprising:
Actuator housing;
Ball screw assembly, comprises ball-screw and feed screw nut, and described ball screw assembly, is arranged in described actuator housing;
LVDT, comprises LVDT housing and can along the iron core that described LVDT housing moves axially in described LVDT housing; Wherein
Described LVDT housing is fixedly installed on the inwall of described actuator housing, and extends along the axis of described actuator housing,
Described LVDT housing is to axially directed along described actuator housing of described feed screw nut.
2. LVDT formula electromechanical actuator according to claim 1, is characterized in that,
The periphery wall of described feed screw nut is provided with the guiding mechanism coordinated with described LVDT housing.
3. LVDT formula electromechanical actuator according to claim 2, is characterized in that,
Described guiding mechanism comprises the periphery wall that is arranged on described feed screw nut and two parallel with the radial transmission line of described feed screw nut joint pins, and two rolling bearings be sheathed on respectively on described joint pin, lead in the both sides rolling with the side of described LVDT housing that described two rolling bearings are positioned at described LVDT housing.
4. LVDT formula electromechanical actuator according to claim 3, is characterized in that,
Described guiding mechanism also comprises the shaft block ring for fixing described rolling bearing.
5. LVDT formula electromechanical actuator according to claim 1, is characterized in that,
Described LVDT formula electromechanical actuator comprises the end cap of the end being fixed on described actuator housing.
6. LVDT formula electromechanical actuator according to claim 5, is characterized in that,
Described LVDT formula electromechanical actuator also comprises operating bar, and described operating bar comprises the stiff end be fixedly connected with described feed screw nut and the external part stretching out described end cap.
7. LVDT formula electromechanical actuator according to claim 6, is characterized in that,
Described end cap is stretched out in one end of described iron core, and is connected by connecting rod with the external part of described operating bar.
8. LVDT formula electromechanical actuator according to claim 6, is characterized in that,
Described operating bar is socketed in the periphery wall of described feed screw nut.
9. LVDT formula electromechanical actuator according to claim 6, is characterized in that,
The periphery wall of described operating bar is provided with support ring.
10. LVDT formula electromechanical actuator according to claim 1, is characterized in that,
The outer wall of described actuator housing is fixedly installed electric connector, and described electric connector is electrically connected with described LVDT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520118532.5U CN204538883U (en) | 2015-02-27 | 2015-02-27 | A kind of LVDT formula electromechanical actuator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520118532.5U CN204538883U (en) | 2015-02-27 | 2015-02-27 | A kind of LVDT formula electromechanical actuator |
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| CN204538883U true CN204538883U (en) | 2015-08-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979222A (en) * | 2017-12-20 | 2018-05-01 | 燕山大学 | A kind of accurate actuator with shock resistance locking device |
| CN108019479A (en) * | 2016-10-31 | 2018-05-11 | 北京精密机电控制设备研究所 | A kind of electromechanical actuator chute-type is oriented to tooth limiting and guiding device |
| CN110868013A (en) * | 2019-10-24 | 2020-03-06 | 北京希姆咨询有限公司 | Linear actuator and control method thereof |
-
2015
- 2015-02-27 CN CN201520118532.5U patent/CN204538883U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019479A (en) * | 2016-10-31 | 2018-05-11 | 北京精密机电控制设备研究所 | A kind of electromechanical actuator chute-type is oriented to tooth limiting and guiding device |
| CN108019479B (en) * | 2016-10-31 | 2021-10-22 | 北京精密机电控制设备研究所 | Limiting and guiding device for sliding groove type guiding teeth of electromechanical actuator |
| CN107979222A (en) * | 2017-12-20 | 2018-05-01 | 燕山大学 | A kind of accurate actuator with shock resistance locking device |
| CN107979222B (en) * | 2017-12-20 | 2019-10-11 | 燕山大学 | A kind of accurate actuator with shock resistance locking device |
| CN110868013A (en) * | 2019-10-24 | 2020-03-06 | 北京希姆咨询有限公司 | Linear actuator and control method thereof |
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