CN213575046U

CN213575046U - Shape following screw capable of being screwed up in two directions

Info

Publication number: CN213575046U
Application number: CN202022643692.5U
Authority: CN
Inventors: 孟志强; 贾毅然; 任昆; 高阳
Original assignee: China Academy of Aerospace Aerodynamics CAAA
Current assignee: China Academy of Aerospace Aerodynamics CAAA
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-06-29
Anticipated expiration: 2030-11-16

Abstract

The utility model relates to the technical field of pneumatic model accessories, in particular to a two-way-screwing shape-following screw, which comprises a screw rod and a nut, wherein one end of the screw rod is the head part of the screw rod, and the other end is the tip part of the screw rod; a threaded section is arranged at one end of the screw rod, which is close to the tip part, and a light column section is arranged at one end of the screw rod, which is close to the head part, wherein one end of the threaded section, which is close to the light column section, is fastened with a side plate of the test flight device model through a nut, and the light column section is in clearance fit with the side plate of the test flight device model; the nut is in threaded connection with the threaded section. When the conformal screw is used for installing the test flight device, after the head of the conformal screw is screwed down, the part of the conformal screw, which is higher than the outer surface of the test flight device, can be removed in a machining mode, so that the conformal surface of the conformal screw and the outer surface of the test flight device is formed, the problem that the groove influences test data when the conventional screw is screwed down is solved, and meanwhile, the tip part of the screw rod can be utilized for secondary fastening or dismounting.

Description

Shape following screw capable of being screwed up in two directions

Technical Field

The utility model belongs to the technical field of pneumatic model accessory technique and specifically relates to a can two-way screw up follow shape screw is related to.

Background

Transition, from the transition of laminar flow to torrent promptly, the point of transition's calculation and prediction are the key prerequisite of designing the aircraft, and the flight test of transition is through the pilot aircraft model that designs, utilizes rocket boosting transmission, and in the flight process, the data through the pressure and the temperature of sensor feedback carry out the analysis to obtain the condition of free incoming flow disturbance and boundary layer internal disturbance, and then obtain the point of transition and provide theoretical foundation for the design of aircraft.

In order to ensure the accuracy of the measured data of the aircraft model, the requirements on the machining precision of the test aircraft model and the surface quality of the model are high. In the flight process, if the surface screw of the aircraft model is loosened or the surface of the test aircraft is provided with pits, the experimental data can be influenced, and the measured data is inaccurate.

However, a great amount of sensors, cables and other necessary equipment are arranged in the cabin of the test aircraft body, and the space structure is narrow, so that the test aircraft generally adopts an external screw connection mode. If adopt ordinary screw fastening, then the screw is difficult to flush with the body after the pilot plane surface processing, and has the recess of screwing up usefulness, and is great to the accuracy influence of test data measurement.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to develop a conformal screw capable of tightening in two directions to solve the above problems

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can two-way screw up along with shape screw, should have eliminated the surface recess that the test flight ware model produced after the final assembly along with shape screw.

The utility model provides a shape following screw capable of being screwed in two directions, which comprises a screw rod and a nut, wherein one end of the screw rod is the head part of the screw rod, and the other end is the tip part of the screw rod;

a threaded section is arranged at one end of the screw rod, which is close to the tip part, and a light column section is arranged at one end of the screw rod, which is close to the head part, wherein one end of the threaded section, which is close to the light column section, is fastened with a model side plate of a pilot plane through the nut, and the light column section is in clearance fit with the model side plate of the pilot plane;

the nut is in threaded connection with the threaded section.

Further, the light column comprises a counter sink part, wherein the counter sink part is arranged between the head part and the light column section;

the countersunk head part is of a round platform-shaped structure, the upper end face and the lower end face of the countersunk head part are round surfaces, and the diameter of the round surface close to one side of the head part is larger than the diameter of the round surface close to one side of the light column section.

Furthermore, the included angle of two generatrix extension lines formed by connecting lines of two diameter vertexes which are parallel to each other and correspond to each other on the upper circular surface and the lower circular surface of the countersunk head part is 70-110 degrees.

Further, the included angle is 90 °.

Further, the head is provided with a hexagonal head appearance section matched with the open-end wrench, and the side of the hexagonal head appearance section is provided with a first annular groove.

Furthermore, the point portion is provided with a square head shape section matched with the open-end wrench, and a second annular groove is formed in the side face of the square head shape section.

Further, the hexagonal head shape section and the countersunk head part are higher than the outer surface of the test flight device model;

the square head shape section protrudes out of the outer surface of the nut.

And furthermore, the aircraft model further comprises a spring gasket, wherein a through hole matched with the screw rod is formed in the spring gasket, one side of the spring gasket is abutted against the nut, and the other side of the spring gasket is abutted against an aircraft model side plate.

Furthermore, the spring gasket is made of metal.

The utility model discloses a can two-way screw up follow shape screw, compare with prior art, have following advantage:

the utility model discloses a can two-way screw up follow shape screw include the screw rod and with screw rod threaded connection's nut, wherein, the one end that is close to screw rod point portion is provided with the screw thread section, and the one end that is close to the screw rod head is provided with the light column section. When the conformal screw is used for installing the test flight device, after the head part and the nut of the conformal screw are screwed down, the part of the conformal screw, which is higher than the outer surface of the test flight device, can be removed in a machining mode, so that the conformal surface of the conformal screw and the outer surface of the test flight device is formed, and the problem that the groove influences test data when a conventional screw is screwed down is solved. Meanwhile, in order to avoid the situation that the following screw is loosened or the test flight device is failed and needs to be disassembled due to machining cutting force, the tip of the screw can be utilized for secondary fastening or disassembly. Therefore, the utility model discloses a follow the surface recess that produces after the final assembly of test flight ware model has been eliminated to shape screw, and then has improved the accuracy of test data measurement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a two-way screw according to the present invention;

FIG. 2 is a schematic view of the hexagonal head profile section of the two-way tightenable conformal screw of the present invention;

FIG. 3 is a schematic view of the square head shape section of the two-way screw of the present invention;

FIG. 4 is a schematic view of the installation of the two-way screw of the present invention;

fig. 5 is a schematic diagram of the final effect of the two-way screw of the present invention.

Description of reference numerals:

1: a nut; 2: a threaded segment; 3: a light pillar segment; 4: a countersunk head part; 5: a hexagonal head shape section; 6: a square head shaped section; 7: a spring washer; 8: a side plate; 9: a base plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-5, the utility model provides a two-way screw-down conformal screw, which comprises a screw rod and a nut 1, wherein one end of the screw rod is the head part of the screw rod, and the other end is the tip part of the screw rod; a threaded section 2 is arranged at one end of the screw rod close to the tip part, and a light column section 3 is arranged at one end close to the head part, wherein one end of the threaded section 2 close to the light column section 3 is fastened with a side plate 8 of a test flight device model through the nut 1, and the light column section 3 is in clearance fit with the side plate 8 of the test flight device model; the nut 1 is in threaded connection with the threaded section 2.

For eliminating the surperficial recess that the test flight ware model produced after the final assembly, the utility model provides a can two-way screw of screwing up along with shape screw, should include the screw rod along with shape screw 1 with screw rod threaded connection, wherein, the one end that is close to the screw rod point portion is provided with screw thread section 2, and the one end that is close to the screw rod head is provided with light column section 3. When using this along with shape screw to install the pilot-plane, the screw rod that will follow the shape screw passes the curb plate 8 of pilot-plane model, screw up along with shape screw head and nut 1 after, the accessible processing mode is got rid of along with the part that the shape screw exceeds the pilot-plane surface, make along with shape screw and pilot-plane surface coplanar, thereby the problem that the recess produced the influence to experimental data when solving conventional screw and screwing up, then utilize the point portion of screw rod to carry out secondary fastening or dismantlement, avoided leading to the fact along with the shape screw to become flexible or pilot-plane to appear the condition such as problem needs dismantlement because of processing cutting force from this. Therefore, the utility model discloses a follow the surface recess that produces after the final assembly of test flight ware model has been eliminated to shape screw, and then has improved the accuracy of test data measurement.

On the basis of the technical scheme, the light column further comprises a counter sink part 4, wherein the counter sink part 4 is arranged between the head part and the light column section 3; the countersunk head part 4 is of a round table-shaped structure with round surfaces at the upper end and the lower end, and the diameter of the round surface at one side close to the countersunk head part is larger than that of the round surface at one side close to the light column section 3.

In order to improve the tightening force of the conformal screw on the test flight device model, a countersunk head part 4 is further arranged between the head part and the light column section 3, the countersunk head part 4 is in a circular truncated cone-shaped structure, the upper end face and the lower end face of the countersunk head part are both circular faces, the diameter of the circular face close to the head part is larger than that of the circular face close to the light column section 3, and the countersunk head part 4 in the shape of the inverted circular truncated cone can improve the tightening force and save the force.

On the basis of the above technical solution, it is further preferable that an included angle between extension lines of two generatrices formed by connecting lines of two diameter vertexes, which are parallel to each other and correspond to each other, on upper and lower circular surfaces of the countersink 4 is 70 to 110 °.

When the taper of the conformal screw countersunk head part 4 is 70-110 degrees, the fastening force between the conformal screw countersunk head part and the test flight device model can be obviously improved, and the fastening quality is ensured.

In order to improve the universality of the conformal screw and enable the conformal screw to be used as a standard part, further, the included angle of two generatrix extension lines formed by connecting two diameter vertexes which are parallel to each other and correspond to each other on the upper circular surface and the lower circular surface of the countersunk head part 4 is 90 degrees.

On the basis of the above preferred technical solution, more preferably, the head is provided with a hexagonal head shape section 5 matched with the open end wrench, and a side surface of the hexagonal head shape section 5 is provided with a first annular groove; the point portion is provided with a square-head appearance section 6 matched with the open-end wrench, and a second annular groove is formed in the side face of the square-head appearance section 6.

As shown in fig. 4, when using the utility model discloses a when following shape screw and carrying out the assembly to the trial flight ware model, at first install curb plate 8 on the bottom plate 9 of trial flight ware model, then load on along with the shape screw, and screw up nut 1, screw up the hexagonal head appearance section 5 that the head set up with the spanner, reuse another spanner screws up nut 1, make along with shape screw fastening on the trial flight ware model, get rid of through the processing mode and follow the part that the shape screw exceeds the trial flight ware model surface, make it unanimous with trial flight ware model surface. As shown in fig. 5, after the free-form screw is free-form, the square-headed outer shape section 6 of the tip portion is fastened using a wrench, and it is checked whether the free-form screw and the nut 1 are loose and finally fastened. If the disassembly and assembly need, the tip square head shape section 6 can be used for disassembly. And the first annular groove arranged on the side surface of the hexagonal head appearance section 5 and the second annular groove arranged on the side surface of the square head appearance section 6 can increase the friction force and the screwing force between the wrench and the hexagonal head appearance section and the square head appearance section.

On the basis of the technical scheme, further, the hexagonal-head-shaped section 5 and the countersunk head part 4 are higher than the outer surface of the test flight device model; the square head shape section 6 protrudes out of the outer surface of the nut 1.

In order to solve the influence of the groove for screwing on the conventional screw on test data, the hexagonal head shape section 5 and the countersunk head part 4 are higher than the outer surface of the test flight device model, so that after the conformal screw is screwed, the conformal screw and the outer surface of the test flight device model can be coplanar through a processing mode. Meanwhile, in order to ensure that the tip square-head shape section 6 can be fastened or disassembled for the second time, the square-head shape section 6 needs to protrude out of the outer surface of the nut 1.

When the conformal screw is used for assembling a test-flight device model, in order to improve the tightening force between the conformal screw and the test-flight device model, the conformal screw further comprises a spring gasket 7, a through hole matched with the screw rod is formed in the spring gasket 7, one side of the spring gasket 7 abuts against the nut 1, the other side of the spring gasket abuts against a side plate 8 of the aircraft model, and the spring gasket 7 is preferably made of metal.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The shape-following screw capable of being screwed in two directions is characterized by comprising a screw rod and a nut (1), wherein one end of the screw rod is the head part of the screw rod, and the other end of the screw rod is the tip part of the screw rod;

a threaded section (2) is arranged at one end, close to the tip part, of the screw, and a light column section (3) is arranged at one end, close to the head part, of the screw, wherein one end, close to the light column section (3), of the threaded section (2) is fixedly connected with a side plate (8) of a test flight device model through a nut (1), and the light column section (3) is in clearance fit with the side plate (8) of the test flight device model;

the nut (1) is in threaded connection with the threaded section (2).

2. The shape-following screw according to claim 1, further comprising a counter-sunk portion (4), the counter-sunk portion (4) being arranged between the head and the light-pillar segment (3);

the countersunk head part (4) is of a round table-shaped structure with round surfaces at the upper end and the lower end, and the diameter of the round surface at one side close to the countersunk head part is larger than that of the round surface at one side close to the light column section (3).

3. The shape-following screw according to claim 2, wherein the angle between the extension lines of two generatrices formed by the connection lines of two diameter vertexes parallel to each other and corresponding to each other on the upper and lower circular surfaces of the countersunk head portion (4) is 70-110 °.

4. A shape-following screw according to claim 3, wherein said included angle is 90 °.

5. Shape following screw according to claim 4, characterised in that the head is provided with a hexagonal-head profile section (5) for cooperation with an open-ended wrench, and that the side of the hexagonal-head profile section (5) is provided with a first annular groove.

6. Shape following screw according to claim 5, characterised in that the tip is provided with a square-headed profiled section (6) cooperating with an open-ended wrench, and that the side of the square-headed profiled section (6) is provided with a second annular groove.

7. The shape-following screw according to claim 6, wherein the hexagonal-head profile section (5) and the countersunk-head section (4) are higher than the trial aircraft model outer surface;

the square head shape section (6) protrudes out of the outer surface of the nut (1).

8. The shape-following screw according to claim 7, further comprising a spring washer (7), wherein a through hole matched with the screw rod is formed in the spring washer (7), one side of the spring washer (7) abuts against the nut (1), and the other side of the spring washer abuts against a side plate (8) of an aircraft model.

9. The shape-following screw according to claim 8, wherein the spring washer (7) is made of metal.