Butterfly bolt capable of being tightened in two directions

Abstract

The utility model belongs to the technical field of spaceflight fastener structures, and particularly relates to a bidirectional tightening butterfly bolt. The tool comprises a screw rod which is used for being matched with a threaded through hole in a product testing tool after penetrating through a through hole in a tested product; a butterfly bolt head is fixedly arranged at one end of the screw rod, and the butterfly bolt head is used for driving the screw rod to rotate under the action of a driving piece; a first driving and screwing structure is arranged on the end face of the other end of the screw rod and used for driving the screw rod to rotate under the action of a driving piece. According to the butterfly bolt capable of being tightened in the two directions, multiple tightening modes can be achieved, so that the assembling and disassembling efficiency is improved; meanwhile, the butterfly bolt capable of being screwed in the two directions can achieve two-way screwing in the bolt assembling and disassembling process between a product and a testing tool in the spaceflight product testing process, and therefore the convenience of bolt assembling and connecting between the product and the testing tool in the spaceflight product testing process is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of aerospace fastener structure, specifically relates to a butterfly bolt of two -way screwing. BACKGROUND

[0002] Bolts are widely used as a kind of installation and fixed profile fastener, and there are many types of bolts used in the existing assembly process, but most of them adopt the structure design of bolt standard parts.The test process of aerospace product is an important link of product production and manufacturing, is directly related to product performance and quality, and will involve a large number of bolt connections between products and test tooling and disassembly during the test process.For the application scene of bolt connection between product and test tooling during the test of aerospace product, under the premise of reaching the hard technical requirements of bolt fastening connection, the convenience degree of assembly and disassembly process, operation accessibility and efficiency also need to be evaluated.

[0003] Most of the currently used bolts are standard bolts of single direction screwing, and the whole assembly and disassembly process can only be completed by relying on tools, and can only be tightened by single direction, so there are not only the problems of operation difficulty for the position with smaller operation space, but also low assembly and disassembly efficiency, which affects product delivery cycle. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the problems of operation difficulty for the position with smaller operation space and low assembly and disassembly efficiency of the currently used bolts being mostly standard bolts of single direction screwing, and provides a butterfly bolt of two -way screwing, which can make the assembly and disassembly of product and tooling more convenient during the test of aerospace product.

[0005] A butterfly bolt of two -way screwing, comprising a screw rod, which is used to cooperate with the threaded hole on the product test tooling after penetrating the through hole on the product to be tested;One end of the screw rod is fixedly provided with a butterfly bolt head, and the butterfly bolt head is used to drive the screw rod to rotate under the action of a driving member;The other end face of the screw rod is provided with a first driving structure, and the first driving structure is used to drive the screw rod to rotate under the action of a driving member.

[0006] Further, the screw rod comprises a light column section and a threaded section, the butterfly bolt head is fixedly arranged at the end of the light column section, and the first driving structure is arranged on the end face of the end portion of the threaded section;In use, the light column section is used to cooperate with the through hole on the product to be tested, and the threaded section is used to cooperate with the threaded hole on the product test tooling.

[0007] Further, the butterfly bolt head is integrally formed with the screw rod.

[0008] Further, the end surface of the butterfly-shaped bolt head is provided with a second driving structure, and the second driving structure is used to drive the screw rod to rotate under the action of the driving member.

[0009] Further, the butterfly-shaped bolt head comprises a bolt head seat and two circular wings, the end of the bolt head seat is fixedly connected with the screw rod, and the side planes of the two circular wings are arranged along the axial direction of the screw rod.

[0010] Further, on the cross section of the screw rod, the position connecting line direction of the two circular wings is the diameter direction of the screw rod.

[0011] Further, the first driving structure is an external convex structure or an internal concave structure for adapting to a driving wrench; and the second driving structure is an external convex structure or an internal concave structure for adapting to a driving wrench.

[0012] Further, the first driving structure is an external hexagonal convex structure, and the second driving structure is an internal hexagonal concave structure.

[0013] Further, the first driving structure and the second driving structure are coaxially arranged.

[0014] Further, in use, the first driving structure extends out of the threaded through hole on the product testing tool.

[0015] The utility model discloses beneficial effects are:

[0016] The utility model provides a two -way screw -down's butterfly -shaped bolt, in use, make screw rod pass through the through -hole on the product of being measured first, and cooperate with the threaded through -hole on the product testing tool. Because the one end of the screw rod is equipped with butterfly -shaped bolt head, so in the stage of tightening operation is more convenient, especially for the part of relatively narrow space, can through the pre -tightening operation of quick, flexible hand or screwing tool. After pre -tightening is completed, can use the screwing tool or hand from the operation space and the operation angle more broad -sided use screwing tool or hand, carries out the final quick tightening, and the screwing tool is such as electric batch or wind batch etc. When disassembling the bolt, can first through the screwing tool or hand by the operation space larger -sided pre -disassembly, then through the screwing butterfly -shaped bolt head and carries out the final disassembly of the bolt, guarantees the disassembly efficiency, and avoids the problem such as knock damage and excess.

[0017] The butterfly bolt of bidirectional tightening provided by the utility model can realize various tightening modes, and can be tightened by manual operation or tightening tools to improve assembly and disassembly efficiency. The butterfly bolt of bidirectional tightening provided by the utility model can realize bidirectional tightening of the bolt assembly and disassembly process between a product and a test tool during space product testing, can solve the problem of operation difficulty in tightening in a small operation space, and can further solve the problems of low work efficiency and influence on product delivery cycle, so that the convenience of bolt assembly and connection between the product and the test tool during space product testing can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a two-dimensional structure schematic diagram of the embodiment.

[0019] Fig. 2 It is a three-dimensional structure schematic diagram of the embodiment.

[0020] Fig. 3 It is a structure schematic diagram of the embodiment in use.

[0021] REFERENCE SIGNS:

[0022] 1-butterfly bolt head, 11-bolt head seat, 12-round wing, 2-second driving and tightening structure, 3-screw rod, 31-light column section, 32-thread section, 4-first driving and tightening structure, 5-measured product, 6-product test tool. DETAILED DESCRIPTION

[0023] In the following, example embodiments will be described more fully with reference to the accompanying drawings, in which example embodiments can be embodied in different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0024] In the case of no conflict, each feature in the embodiments of the utility model and the embodiments can be combined with each other.

[0025] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0026] The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present application. As used in the present application, the singular forms "a" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0027] When the terms "comprise" and / or "consist of" are used in the specification, it is intended that the described features, integers, steps, operations, elements, and / or components will be present, but not excluding the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0028] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0029] For the currently used bolts are mostly single direction tightening standard bolts, there are operation difficulties, low assembly and disassembly efficiency for the positions with smaller operation space, the embodiment provides a bidirectional tightening butterfly bolt, which can realize various tightening modes to improve the assembly and disassembly efficiency; meanwhile, the bidirectional tightening butterfly bolt provided by the embodiment can also realize the bidirectional tightening of the bolt assembly and disassembly process between the product and the test tool during the space product test, so as to improve the convenience of the bolt assembly and connection between the product and the test tool during the space product test.

[0030] As shown in Figs. 1 to 3 The bidirectional tightening butterfly bolt provided by the embodiment includes a screw rod 3, one end of the screw rod 3 is fixedly provided with a butterfly bolt head 1, and the other end is provided with a first driving structure 4. In use, after the one end of the screw rod 3 penetrates through the through hole on the product under test 5 and cooperates with the threaded through hole on the product test tool 6, and the butterfly bolt head 1 end abuts on the side surface of the product under test 5, the fastening between the product under test 5 and the product test tool 6 is realized.

[0031] In the embodiment, the butterfly bolt head 1 and the first driving structure 4 are both used to drive the screw rod 3 to rotate under the action of the driving member. Specifically, the driving member acting on the butterfly bolt head 1 and the driving member acting on the first driving structure 4 can be the same or different. Preferably, the butterfly bolt head 1 can be screwed by a quick and flexible manual mode, and the first driving structure 4 can be screwed by a driving tool with a constant torque quick tightening, such as an electric wrench or a pneumatic wrench.

[0032] In use, the embodiment can include a pre-tightening stage and a constant torque tightening stage. In the pre-tightening stage, the butterfly bolt head 1 can be operated more conveniently, especially for the parts with smaller space, the quick and flexible manual pre-tightening operation can be realized. After the pre-tightening is completed, the electric wrench or the pneumatic wrench can be used from the side with more operation space and operation angle to finally tighten with a constant torque. When disassembling the screw, the electric wrench or the pneumatic wrench can be used from the side with more operation space to pre-disassemble, and finally the screw is manually disassembled by the butterfly segment, which ensures the disassembly efficiency while avoiding the problems of bumping damage and excess materials.

[0033] Therefore, the bidirectional tightening wing bolt provided in this embodiment can achieve multiple tightening methods, and can be tightened manually or with tightening tools to improve assembly and disassembly efficiency. Simultaneously, the bidirectional tightening wing bolt provided in this embodiment enables bidirectional tightening during the assembly and disassembly of bolts between the product and test fixtures during aerospace product testing. This solves the problem of operational difficulties in tightening in confined spaces, thereby addressing issues such as low work efficiency and impacts on product delivery cycles. Ultimately, it improves the convenience of bolt assembly and connection between the product and test fixtures during aerospace product testing.

[0034] Furthermore, in this embodiment, the butterfly bolt head 1 and the screw 3 can be integrally formed to increase the steel strength of the overall structure of this embodiment.

[0035] like Fig. 2 As shown, the screw 3 in this embodiment includes a cylindrical section 31 and a threaded section 32. A butterfly-shaped bolt head 1 is fixed to the end of the cylindrical section 31, and a first drive screwing structure 4 is disposed on the end face of the threaded section 32. In use, the screw 3 needs to pass through the through hole in the product under test 5. That is, at least a portion of the screw 3 will mate with the through hole in the product under test 5. Since the thread on the screw 3 mainly mates with the threaded hole on the product testing fixture 6, the method of arranging the cylindrical section 31 on the screw 3 and mates the cylindrical section 31 with the through hole in the product under test 5 not only does not affect the fastening reliability between the product under test 5 and the product testing fixture 6, but also reduces the length of the thread on the screw 3, thereby reducing the processing cost of this embodiment.

[0036] For ease of implementation, in this embodiment, the first drive-tightening structure 4 is a convex or concave structure adapted to the drive-tightening wrench; the second drive-tightening structure 2 is also a convex or concave structure adapted to the drive-tightening wrench. In this embodiment, the first drive-tightening structure 4 and the second drive-tightening structure 2 can be the same or different.

[0037] Specifically, such as Fig. 2 As shown, in this embodiment, the first drive-tightening structure 4 can be an external hexagonal convex structure, and the second drive-tightening structure 2 can be an internal hexagonal concave structure, so that the first drive-tightening structure 4 or the second drive-tightening structure 2 can be turned by an external hexagonal wrench or an internal hexagonal wrench. Preferably, the first drive-tightening structure 4, the second drive-tightening structure 2 and the screw 3 are arranged coaxially.

[0038] Furthermore, in use, the first drive screwing structure 4 in this embodiment extends out of the threaded through hole on the product testing fixture 6 to facilitate screwing operations.

[0039] In the embodiment, the end surface of the butterfly head 1 is provided with a second driving structure 2, and the second driving structure 2 is used to drive the screw rod 3 to rotate under the action of the driving member, so that at one end of the butterfly head 1, not only the butterfly head 1 can be screwed by a quick and flexible manual method, but also the second driving structure 2 can be screwed by a driving tool with a constant torque quick tightening, so that the embodiment can better operate in a small space.

[0040] As shown in Fig. 2 The butterfly head 1 in the embodiment includes a head seat 11 and two circular wings 12, the end of the head seat 11 is fixedly connected with the screw rod 3, the side plane of the circular wing 12 is arranged along the axial direction of the screw rod 3, and the two circular wings 12 are arranged at intervals on the side surface of the head seat 11. In the embodiment, the specific structure of the circular wing 12 is not limited, as long as it is convenient for manual screwing. Preferably, the circular wing 12 can adopt a sheet or plate structure with an arc-shaped edge. In the embodiment, the side plane of the circular wing 12 is arranged along the axial direction of the screw rod 3, that is, the arrangement direction of the side plane of the circular wing 12 should be the same as the axial direction of the screw rod 3, as shown in Fig. 2 When the axial direction of the screw rod 3 is vertically arranged, the side plane of the circular wing 12 should also be vertically arranged.

[0041] Further, on the cross section of the screw rod 3, the position connecting line direction of the two circular wings 12 in the embodiment is the diameter direction of the screw rod 3. That is, the two circular wings 12 are arranged at equal intervals in the circumferential direction of the head seat 11, so as to increase the comfort degree during manual screwing operation.

[0042] The example embodiments have been disclosed herein and, although the use of specific terms is expressly used herein, they are intended in a generic sense only and are not intended to limit the scope of the present application. In some embodiments, it will be apparent to those skilled in the art from this disclosure that the features, aspects, and / or elements described with respect to a particular embodiment are not intended to be mutually exclusive in other embodiments unless expressly so limited. Thus, the skilled artisan will appreciate that various changes can be made without departing from the scope of the present application as set forth in the claims attached hereto.

Claims

1. A butterfly bolt for bidirectional tightening, characterized by: The screw rod (3) is used to cooperate with the threaded hole on the product testing tool (6) after penetrating the through hole on the measured product (5); one end of the screw rod (3) is fixedly provided with a butterfly head (1), and the butterfly head (1) is used to drive the screw rod (3) to rotate under the action of a driving member; the other end of the screw rod (3) is provided with a first driving structure (4) on the end face, and the first driving structure (4) is used to drive the screw rod (3) to rotate under the action of a driving member.

2. The bidirectionally tightened wing bolt of claim 1, wherein: The screw rod (3) comprises a light column section (31) and a threaded section (32), the butterfly head (1) is fixedly arranged at the end of the light column section (31), and the first driving structure (4) is arranged on the end face of the end of the threaded section (32); in use, the light column section (31) is used to cooperate with the through hole on the measured product (5), and the threaded section (32) is used to cooperate with the threaded hole on the product testing tool (6).

3. The double-tightened wing bolt according to claim 1 or 2, characterized in that: The butterfly head (1) is integrally formed with the screw rod (3).

4. The bidirectionally tightened wing bolt of claim 1, wherein: The end face of the butterfly head (1) is provided with a second driving structure (2), and the second driving structure (2) is used to drive the screw rod (3) to rotate under the action of a driving member.

5. The double-tightened wing bolt of claim 4, wherein: The butterfly head (1) comprises a head seat (11) and two circular wings (12), the end of the head seat (11) is fixedly connected with the screw rod (3), and the side planes of the circular wings (12) are arranged along the axial direction of the screw rod (3), and the two circular wings (12) are arranged at intervals on the side face of the head seat (11).

6. The double-tightened wing bolt of claim 5, wherein: On the cross section of the screw rod (3), the position connecting line direction of the two circular wings (12) is the diameter direction of the screw rod (3).

7. The double-tightened wing bolt according to any one of claims 4-6, characterized in that: The first driving structure (4) is an outer convex structure or an inner concave structure adapted to a driving wrench; the second driving structure (2) is an outer convex structure or an inner concave structure adapted to a driving wrench.

8. The bidirectionally tightened wing bolt of claim 7, wherein: The first driving structure (4) is an outer hexagonal convex structure, and the second driving structure (2) is an inner hexagonal concave structure.

9. The bidirectionally tightened wing bolt of claim 7, wherein: The first driving structure (4) and the second driving structure (2) are coaxially arranged.

10. The double-tightened wing bolt according to claim 8 or 9, characterized in that: In use, the first driving structure (4) protrudes out of the threaded hole on the product testing tool (6).

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