Safe locking mechanism for large-size rotor balance

Abstract

The utility model belongs to the technical field of helicopter structural design, and particularly relates to a large-size rotor balance safety locking mechanism, an upper locking support comprises an upper square bottom plate and a stand column, bolt holes are formed in four corners of the upper square bottom plate, and two threaded holes perpendicular to each other are formed in the stand column; the lower locking support comprises a lower square bottom plate and an L-shaped vertical plate; bolt holes are formed in the four corners of the lower square bottom plate, two mounting holes perpendicular to each other are formed in the L-shaped vertical plate, and four screw holes are evenly distributed in the periphery of each mounting hole in the circumferential direction; the stand column is matched with the L-shaped vertical plate. An annular boss is arranged in the middle of the threaded locking column, and external threads are arranged on the side face of the annular boss. The threaded locking column penetrates through the mounting hole of the L-shaped vertical plate and is inserted into the threaded hole of the vertical column; the threaded locking cap is provided with an internal thread matched with the external thread of the annular boss, the threaded locking cap is tightly attached to the outer side face of the L-shaped vertical plate after being in threaded connection with the threaded locking column, and the threaded locking column is sleeved with the limiting top cover which is tightly attached to the threaded locking cap; and the limiting top cover and the threaded locking column are locked on the L-shaped vertical plate by four fastening screws.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of helicopter structure design, especially relates to a large -size rotor balance safety locking mechanism. BACKGROUND

[0002] Carrying the force from the rotating process of the rotor system, and the high-speed rotating rotor system exists the serious force imbalance condition such as rotating part flying out, once similar event occurs in the test process, then can lead to the whole rotor system flying out and destroying, in order to protect the test equipment and test personnel safety, need to protect the rotor balance, simultaneously, locking mechanism is different from the locking of general use, the locking force of general rotor balance safety locking mechanism can not be too big, to prevent locking force damaging balance force element, if locking force is not big, the pre-tightening anti-loosening of screw thread can not be realized, under alternating load, vibration environment, locking mechanism is extremely easy to loosen, cannot reach the locking effect, if in the force measurement period, do not need to lock, again can lead to contact, lead to force measurement error.

[0003] Safety locking mechanism has two conditions when working.Locking, mainly for preventing the destructive load during the installation, dismounting, transportation of rotor balance from transmitting to sensor and elastic link, leading to damage;Balance safety mechanism loosening state, mainly used to satisfy the aerodynamic force of force measuring element measuring rotor system, simultaneously, if test accident occurs, can prevent the further deterioration of event.

[0004] At present, according to the use requirement of rotor balance, simultaneously in order to transform state conveniently, need a safety locking mechanism to protect rotor balance, can measure the aerodynamic force generated by rotor when loosening, simultaneously, when rotor system operation fails, can protect rotor balance, prevent the whole rotor system from flying out, locking, protect the safety of rotor balance during installation, dismounting, transportation. Utility model content

[0005] The utility model discloses a large -size rotor balance safety locking mechanism can conveniently and reliably guarantee locking and loosening state for large -size rotor frame type balance, can protect rotor balance.

[0006] Technical scheme

[0007] A large -size rotor balance locking mechanism, it include: upper locking support, lower locking support, threaded locking column, threaded locking cap, limit top cover;

[0008] The upper locking support comprises an upper square bottom plate and a column, the square bottom plate is provided with bolt holes at four corners, and the column is provided with two thread holes perpendicular to each other; the lower locking support comprises a lower square bottom plate and an L-shaped vertical plate; the square bottom plate is provided with bolt holes at four corners, and the L-shaped vertical plate is provided with two mounting holes perpendicular to each other, and the mounting holes are uniformly provided with four screw holes in the circumferential direction; the column and the L-shaped vertical plate are matched with each other;

[0009] The middle part of the threaded locking column is provided with an annular boss as a limiting part, and the side surface of the annular boss is provided with external threads; the threaded locking column is inserted into the thread hole of the column through the mounting hole of the L-shaped vertical plate;

[0010] The threaded locking cap is provided with internal threads matched with the external threads of the annular boss, and is tightly attached to the outer side surface of the L-shaped vertical plate after being screwed with the threaded locking column; the limiting top cover is sleeved on the threaded locking column and tightly attached to the threaded locking cap;

[0011] The four fastening screws lock the limiting top cover and the threaded locking column on the L-shaped vertical plate.

[0012] Further, the threaded locking cap comprises an internal thread cylinder and a flange edge;

[0013] The flange edge is uniformly provided with four through holes in the circumferential direction;

[0014] The upper end of the internal thread cylinder is a non-threaded section, and the length of the threaded section of the internal thread cylinder is greater than the movement stroke of the threaded locking column.

[0015] Further, the limiting top cover is a flat circular plate, and the inner edge is provided with an annular protrusion; the outer diameter of the annular protrusion is matched with the inner diameter of the non-threaded section of the upper end of the internal thread cylinder of the threaded locking cap;

[0016] The inner diameter of the limiting top cover is smaller than the outer diameter of the annular boss of the threaded locking column.

[0017] Further, the outer diameter of the annular boss of the threaded locking column is greater than the inner diameter of the mounting hole of the L-shaped vertical plate.

[0018] Further, the inner corner of the L-shaped vertical plate is a circular arc transition, and the column is provided with a circular arc corner matched therewith.

[0019] Further, the outer end surface of the threaded locking column is provided with an internal hexagonal hole.

[0020] As described above, the beneficial effects of the present application are as follows:

[0021] (1) The environmental adaptability is strong, and the test site can be adjusted;

[0022] (2) The operation is simple, convenient and reliable, and the labor intensity of the operator is low;

[0023] (3) The mechanism structure is simple, easy to process, anti-loose, safe and reliable;

[0024] (4) Especially suitable for frame strain gauge with large structure size. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole view of a large-size rotor balance lock mechanism.

[0026] Figure 2 It is an assembly relationship view of a large-size rotor balance lock mechanism.

[0027] Figure 3 It is a working state view of a large-size rotor balance lock mechanism in locking state.

[0028] Figure 4 It is a working state view of a large-size rotor balance lock mechanism in unlocking state.

[0029] Figure 5 It is an assembly view of a large-size rotor balance lock mechanism and a balance.

[0030] Figure 6 It is a view of an upper locking support structure.

[0031] Figure 7 It is a view of a lower locking support structure.

[0032] Figure 8 It is a view of a threaded locking column structure.

[0033] Figure 9 It is a view of a threaded locking cap structure.

[0034] Figure 10 It is a view of a limiting top cover structure. DETAILED DESCRIPTION

[0035] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0036] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0037] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0038] A safety locking mechanism for a large-size frame-type rotary balance, such as Figures 1-10 As shown, the mechanism includes: an upper locking support 1, a lower locking support 2, a threaded locking pin 3, a threaded locking cap 4, a limiting top cover 5, and fastening screws 6. The technical focus of this solution is on the functional realization of the locking mechanism under different usage conditions and the reasonable control of the gap between the threaded locking pin and the threaded locking cap. The assembly relationship between the components is as follows: the upper locking support is connected to the balance floating frame, the lower locking support is connected to the balance fixed frame, the threaded locking pin 3 is screwed into the threaded locking cap 4, and the threaded locking cap 4 and the top cover 5 are fixed to the lower locking support 2 using fastening screws.

[0039] Its operation is as follows: The frame-type rotary balance has two operating states: a loose state and a locked state. In the loose state, use an Allen wrench to turn the threaded locking pin 3 clockwise all the way until the threaded end face contacts the limit cover and tightens it. In the locked state, turn the threaded locking pin 3 clockwise all the way until the threaded end face contacts the lower locking support 2 and tightens it.

[0040] A method for protecting a balance using the aforementioned safety locking mechanism, the method comprising the following steps:

[0041] Based on the structural dimensions of the rotor balance, the upper locking support 1 and the lower locking support 2 are designed to ensure that the two holes into which the threaded locking pin 3 is inserted are concentric. When the threaded locking pin 3 is screwed in to the right to the bottom, there is a gap between the end face of the threaded locking pin 3 and the lower locking support 2. When the locking pin 3 is screwed in to the left to the bottom, there is a certain gap between the bottom cylinder and the upper locking support 1 (the gap is greater than the deformation of the rotor balance during operation). The threaded locking cap 4 and the top cover 5 are fixed on the lower locking support 5 with screws. The safety locking pin has a certain anti-loosening effect when tightened and can be visually checked to see if it is locked.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A large size rotor balance safety locking mechanism, characterized in that: The utility model relates to a locking device for a threaded fastener, comprising: An upper locking support, a lower locking support, a threaded locking post, a threaded locking cap, and a limiting top cover; The upper locking support comprises a square upper plate and a post, the square upper plate is provided with bolt holes at four corners, and the post is provided with two mutually perpendicular threaded holes; the lower locking support comprises a square lower plate and an L-shaped vertical plate, the square lower plate is provided with bolt holes at four corners, the L-shaped vertical plate is provided with two mutually perpendicular mounting holes, and the mounting holes are uniformly provided with four screw holes around the circumference; the post and the L-shaped vertical plate are mutually matched; The threaded locking post is provided with an annular boss in the middle as a limiting part, the annular boss is provided with external threads on the side face, the threaded locking post is inserted into the threaded hole of the post through the mounting hole of the L-shaped vertical plate, and the threaded locking post is provided with an annular boss in the middle as a limiting part; The threaded locking cap is provided with internal threads matched with the external threads of the annular boss, is tightly attached to the outer side face of the L-shaped vertical plate after being screwed with the threaded locking post, and the limiting top cover is sleeved on the threaded locking post and tightly attached to the threaded locking cap; Four fastening screws lock the limiting top cover and the threaded locking post on the L-shaped vertical plate.

2. The mechanism of claim 1, wherein: The threaded locking cap comprises an internal thread cylinder and a flange edge; The flange edge is uniformly provided with four through holes around the circumference; The upper end of the internal thread cylinder is a non-threaded section, and the length of the threaded section of the internal thread cylinder is greater than the movement stroke of the threaded locking post.

3. The mechanism of claim 2, wherein: The limiting top cover is a flat circular plate, and the inner side edge is provided with an annular protrusion; the outer diameter of the annular protrusion is matched with the inner diameter of the non-threaded section of the upper end of the internal thread cylinder of the threaded locking cap in the form of a gap; The inner diameter of the limiting top cover is smaller than the outer diameter of the annular boss of the threaded locking post.

4. The mechanism of claim 3, wherein: The outer diameter of the annular boss of the threaded locking post is greater than the inner diameter of the mounting hole of the L-shaped vertical plate.

5. The mechanism of claim 4, wherein: The inner corner of the L-shaped vertical plate is a circular arc transition, and the post is provided with a circular arc corner matched therewith.

6. The mechanism of claim 5, wherein: The outer end face of the threaded locking post is provided with an internal hexagonal hole.

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