CN217207228U

CN217207228U - Tail inner dodecagonal high-locking bolt structure

Info

Publication number: CN217207228U
Application number: CN202220775967.7U
Authority: CN
Inventors: 高慎金; 陈衍祥; 田坤
Original assignee: Zhuzhou Haojie Aviation Technology Co ltd
Current assignee: Zhuzhou Haojie Aviation Technology Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-08-16
Anticipated expiration: 2032-04-02

Abstract

The utility model discloses a tail inner dodecagonal high-locking bolt structure, which comprises a bolt body, wherein the bolt body comprises a bolt head, a screw rod and an outer threaded rod which are fixed into a whole, and the tail part of the outer threaded rod is provided with an inner dodecagonal hole; the inner dodecagonal hole provides larger mounting torque, stress concentration is reduced, the matching of the screwing mechanism and the thread body can be aligned quickly during mounting, slipping is reduced, and mounting efficiency is effectively improved.

Description

Twelve-angle high-locking bolt structure in tail part

Technical Field

The utility model relates to a high locking bolt technical field, concretely relates to twelve-angle high-locking bolt structure in afterbody.

Background

The high-locking bolt is largely used for mounting and fixing aircraft skin, the fatigue strength of a joint is improved by utilizing the interference of the bolt and the combined action of interference fit and higher pretightening force caused by nuts, the high-locking bolt is a titanium alloy fastener which is most used on an aircraft, the mounting mode is interference assembly and single-side tightening of double-side mounting, the interference assembly can provide part of mounting torque during mounting, the requirement on the mounting efficiency is higher due to large use amount, the composite material consumption is larger and larger along with the development of science and technology, the composite material is easy to layer, the interference assembly cannot be carried out, and the requirement on the mounting mechanism of the high-locking bolt is higher and higher.

The conventional high-locking bolt uses an inner hexagonal mechanism, stress concentration and slipping are easily generated during installation and use, certain influence is exerted on product performance and installation efficiency, the phenomenon is more obvious particularly when the high-locking bolt is installed and used on a composite material, and mechanical property and installation performance are poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a twelve-angle high-locking bolt structure in afterbody, including the bolt body, the bolt body is including fixed bolt head, screw rod and the external screw thread pole as an organic whole, and interior twelve-angle hole has been seted up to the afterbody of external screw thread pole.

Furthermore, the wrench device also comprises a wrench mechanism, the wrench mechanism comprises a dodecagonal wrench conical head matched with the inner dodecagonal hole, and a wrench handle is fixed at one end of the dodecagonal wrench conical head.

Furthermore, the outer side surface of the external thread rod is in threaded connection with a collar piece, and the sleeve changing piece comprises an installation collar in threaded connection with the external thread rod and a twisting collar which is integrated with the installation collar and is not connected with the external thread rod.

Furthermore, one end of the wrenching handle close to the dodecagonal wrenching conical head is provided with a high locking adaptive groove for a locking sleeve to replace parts.

Furthermore, the depth of the inner dodecagonal hole is one third of the length of the external thread rod.

Further, the maximum outer diameter of the inner dodecagonal hole is half of the maximum outer diameter of the outer threaded rod.

The utility model discloses beneficial effect as follows:

1. interior dodecagonal hole provides bigger installation torque in traditional interior hexagonal hole relatively, and the cooperation of wrenching mechanism and screw thread body can align fast during the installation, reduces the appearance of the phenomenon of skidding, effectively improves the installation effectiveness.

2. The required length of the wrenching mechanism is reduced, so that the number of non-hollow main bearing thread buckles is increased, the stress of the inner dodecagonal hole structure is more uniform, the stress concentration is reduced, and the tensile strength and the fatigue strength of the product are effectively improved.

Drawings

FIG. 1 is a schematic structural view of the utility model before wrenching and installation;

FIG. 2 is a schematic structural view of the utility model after wrenching and installation;

fig. 3 is a schematic structural view of the thread body of the present invention;

fig. 4 is a schematic view of an end structure of the middle screw body of the present invention.

The reference numerals are explained below: 1. a threaded body; 101. a bolt head; 102. a screw; 103. an externally threaded rod; 104. an inner dodecagonal hole; 2. a wrenching mechanism; 201. twisting the conical head by a dodecagonal wrench; 202. pulling and twisting the handle; 203. a high locking adaptation groove; 3. a collar member; 301. mounting a lantern ring; 302. the collar is twisted.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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.

The invention will be further explained with reference to the drawings attached to the specification:

example 1:

as shown in fig. 3 and 4, a high-locking bolt structure with an inner dodecagonal tail part comprises a bolt body, wherein the bolt body comprises a bolt head 101, a screw rod 102 and an outer threaded rod 103 which are fixed into a whole, and the tail part of the outer threaded rod 103 is provided with an inner dodecagonal hole 104; wherein, the depth of the inner dodecagonal hole 104 is one third of the length of the outer threaded rod 103, and the maximum outer diameter of the inner dodecagonal hole 104 is one half of the maximum outer diameter of the outer threaded rod 103.

The inner dodecagonal hole 104 reduces stress concentration relative to the hexagonal hole, stress is more uniform, and slipping is effectively reduced due to the fact that larger mounting torque can be provided.

Example 2:

as shown in fig. 1 and 2, on the basis of the above embodiment 1, a wrenching mechanism 2 is further provided, the wrenching mechanism 2 includes a dodecagonal wrenching conical head 201 adapted to the inner dodecagonal hole 104, and a wrenching handle 202 is fixed to one end of the dodecagonal wrenching conical head 201; the outer side surface of the external thread rod 103 is in threaded connection with a collar piece 3, and the collar piece comprises a mounting collar 301 in threaded connection with the external thread rod 103 and a torsion collar 302 which is integrated with the mounting collar 301 and is not connected with the external thread rod 103; one end of the wrenching handle 202 close to the dodecagonal wrenching conical head 201 is provided with a high locking adapting groove 203 for locking a sleeve replacing piece.

The dodecagonal wrenching conical head 201 can be quickly aligned with the inner dodecagonal hole 104, the depth of the inner dodecagonal hole 104 is one third of the length of the outer threaded rod 103, and the inner dodecagonal hole is shorter than the inner hexagonal hole, so that the number of non-hollow main bearing threaded buttons is increased, and the tensile strength and the fatigue strength of the product are effectively reported.

The utility model discloses the theory of operation as follows:

during installation, the high locking adapting groove 203 of the wrenching mechanism 2 is firmly propped against the collar piece 3, the wrenching handle 202 is started, and the installation collar 301 is gradually screwed to the outer side of the external thread rod 103 until the twisting collar 302 is twisted off, namely the installation is finished; because the inner hole is not the inner dodecagonal hole 104, the matching of the wrenching mechanism 2 and the thread body 1 can be quickly aligned during installation, a larger installation torque can be provided, the occurrence of a slipping phenomenon is reduced, and the installation efficiency is effectively improved; the installation efficiency of different materials can be improved by 5-10%, 15-20 ten thousand bolt products need to be installed on a single passenger plane with a single flight channel, the installation efficiency of the plane can be improved extremely, and more reliable and rapid installation is realized.

The depth of the inner dodecagonal hole 104 is one third of the length of the outer threaded rod 103, the required length of the wrenching mechanism 2 is further reduced, the number of non-hollow main bearing threaded buttons is increased, stress concentration is reduced due to the structure of the inner dodecagonal hole 104, the tensile strength and the fatigue strength of a product are improved, the tensile strength can be improved by 1% -5% through simulation and tests, and the fatigue strength can be improved by 5% -10%.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a twelve high lock bolt structure in afterbody, includes the bolt body, the bolt body is including fixed bolt head (101), screw rod (102) and external screw thread pole (103) as an organic whole, its characterized in that: the tail part of the external thread rod (103) is provided with an internal dodecagonal hole (104).

2. The aft inner twelve-corner high-lock bolt structure of claim 1, wherein: the inner dodecagonal hole spanner is characterized by further comprising a spanner mechanism (2), the spanner mechanism (2) comprises a dodecagonal spanner conical head (201) matched with the inner dodecagonal hole (104), and a spanner handle (202) is fixed at one end of the dodecagonal spanner conical head (201).

3. The aft inner twelve-corner high-lock bolt structure of claim 2, wherein: the outer side surface of the external thread rod (103) is in threaded connection with a collar piece (3), and the collar piece comprises a mounting collar (301) in threaded connection with the external thread rod (103) and a twisting collar (302) which is integrated with the mounting collar (301) and is not connected with the external thread rod (103).

4. The aft inner twelve-corner high-lock bolt structure of claim 3, wherein: one end of the wrenching handle (202) close to the dodecagonal wrenching conical head (201) is provided with a high locking adaptive groove (203) for locking a sleeve replacing piece.

5. The aft inner twelve-corner high-lock bolt structure of claim 1, wherein: the depth of the inner dodecagonal hole (104) is one third of the length of the outer threaded rod (103).

6. The aft inner twelve-corner high-lock bolt structure of claim 2, wherein: the maximum outer diameter of the inner dodecagonal hole (104) is half of the maximum outer diameter of the outer threaded rod (103).