阅读说明：本技术 一种直升机桨叶连接螺栓安装工具及安装方法 (Mounting tool and mounting method for connecting bolt of helicopter blade ) 是由 海日汗 包长春 徐震翰 李京阳 王贤宇 印明威 于 2021-02-22 设计创作，主要内容包括：本发明公开一种直升机桨叶连接螺栓安装工具,包括第一定位件和第二定位件,第一定位件和第二定位件均包括沿轴向连接的等径段和变径段,等径段的直径与理论加工状态下定位孔的直径相匹配,变径段的直径自与等径段连接的一端向远离等径段的方向渐缩。本发明还提供一种直升机桨叶连接螺栓安装方法。本发明直升机桨叶连接螺栓安装工具,通过第一定位件和第二定位件能够快速找正桨根连接件、桨叶夹套和桨叶的通孔位置,形成理想状态的定位孔,并进行连接螺栓的安装,大幅度提高装配效率。(The invention discloses a mounting tool for a connecting bolt of a helicopter blade, which comprises a first positioning piece and a second positioning piece, wherein the first positioning piece and the second positioning piece respectively comprise an equal-diameter section and a reducing section which are axially connected, the diameter of the equal-diameter section is matched with that of a positioning hole in a theoretical machining state, and the diameter of the reducing section is gradually reduced from one end connected with the equal-diameter section to the direction far away from the equal-diameter section. The invention also provides a method for installing the connecting bolt of the helicopter blade. According to the mounting tool for the connecting bolt of the helicopter blade, the positions of the through holes of the blade root connecting piece, the blade jacket and the blade can be quickly aligned through the first positioning piece and the second positioning piece, so that an ideal-state positioning hole is formed, the connecting bolt is mounted, and the assembly efficiency is greatly improved.)

1. The utility model provides a helicopter paddle connecting bolt mounting tool, characterized in that includes first setting element (1) and second setting element (2), first setting element (1) with second setting element (2) all include along axial connection equal diameter section (11) and reducing section (12,12'), the diameter phase-match of locating hole under the diameter of equal diameter section (11) and the theoretical processing state, the diameter of reducing section (12,12') from with the one end that equal diameter section (11) are connected is to keeping away from the direction convergent of equal diameter section (11).

2. A helicopter blade attachment bolt installation tool according to claim 1 further comprising a head (13) axially connected to said constant diameter section (11), said head (13) having a diameter greater than the diameter of said constant diameter section (11).

3. A helicopter blade attachment bolt installation tool according to claim 2, wherein the peripheral wall of the end of said constant diameter section (11) to which said head portion (13) is attached is provided with a first circumferentially extending groove (1 a).

4. A helicopter blade attachment bolt installation tool according to claim 1, wherein said tapered section (12) peripheral wall is provided with a second circumferentially extending groove (1 b).

5. A helicopter blade attachment bolt installation tool according to any one of claims 1 to 4 wherein at least one of said first attachment member (1) and said second attachment member (2) is further provided with a threaded section (14) in axial communication with said tapered section (12'), said threaded section (14) having a diameter less than the diameter of said constant diameter section (11).

6. A helicopter blade attachment bolt installation tool according to claim 5, wherein the junction of said threaded section (14) and said reducer section (12') is further provided with a circumferentially extending third groove (1 c).

7. A helicopter blade attachment bolt installation tool according to any one of claims 1 to 4, wherein said first attachment member (1) and said second attachment member (2) are made of bolts.

8. A helicopter blade connecting bolt mounting method is characterized by comprising a positioning hole alignment method, wherein the positioning hole alignment method comprises the following steps:

inserting a first positioning piece (1) into a propeller root connecting piece (01), a propeller blade jacket (02) and a propeller blade (03) from a first end of a positioning hole in sequence, and enabling a reducing section (12) of the first positioning piece (1) to partially penetrate out through a second end of the positioning hole;

axially abutting a variable diameter section (12') of a second positioning piece (2) against a variable diameter section (12) of the first positioning piece (1), knocking the second positioning piece (2) until the first positioning piece (1) is ejected out, and enabling a part of the variable diameter section (12') of the second positioning piece (2) to penetrate out through a first end of the positioning hole.

9. A helicopter blade attachment bolt installation method according to claim 8, wherein said second locating member (2) acts as an attachment bolt when provided with a threaded section (14) axially connected to said reducer section (12); when the second locating member (2) does not include a threaded section (14), the method of installing a helicopter blade attachment bolt further comprises:

and axially abutting a connecting bolt against the reducing section (12') of the second positioning piece (2), knocking the connecting bolt until one end of the connecting bolt penetrates out of the second end of the positioning hole, and abutting the end head of the other end of the connecting bolt against the end face of the first end of the positioning hole.

Technical Field

The invention relates to the technical field of helicopter assembling tools, in particular to a mounting tool and a mounting method for a connecting bolt of a helicopter blade.

Background

The small helicopter has good maneuverability and low price, can carry various loads, and is the mainstream development direction at present. The small helicopter is generally a seesaw type rotor, the blades are short and small, the centrifugal force is not large, and the small helicopter is mainly connected with a blade root connecting piece and a blade jacket through bolts.

Because a plurality of parts of the propeller root connecting piece, the propeller jacket and the propeller need to be fixed by the same connecting bolt, and certain errors can exist in the positioning holes in the processing process, the positioning and the installation are troublesome.

Therefore, an auxiliary tool for installing the connecting bolt of the helicopter blade needs to be designed, the hole position is quickly aligned for installation, and the assembly efficiency is improved.

Disclosure of Invention

The invention aims to provide an auxiliary tool for mounting a connecting bolt of a helicopter blade, so that a hole position can be quickly aligned for mounting, and the assembly efficiency is improved. The invention also aims to provide a method for installing the connecting bolt of the helicopter blade, so that the hole position can be quickly aligned for installation, and the assembly efficiency is improved.

In order to solve the technical problem, the invention provides a mounting tool for a connecting bolt of a helicopter blade, which comprises a first positioning piece and a second positioning piece, wherein the first positioning piece and the second positioning piece respectively comprise an equal-diameter section and a variable-diameter section which are axially connected, the diameter of the equal-diameter section is matched with that of a positioning hole in a theoretical machining state, and the diameter of the variable-diameter section is gradually reduced from one end connected with the equal-diameter section to the direction far away from the equal-diameter section.

The invention provides a mounting tool for connecting bolts of helicopter blades, which comprises the following steps: firstly, inserting a first positioning piece into a propeller root connecting piece, a propeller jacket and a propeller blade in sequence from a first end of a positioning hole, and enabling a reducing section part of the first positioning piece to penetrate out of a second end of the positioning hole; secondly, axially abutting the reducing section of the second positioning piece with the reducing section of the first positioning piece, knocking the second positioning piece through a rubber hammer until the first positioning piece is ejected out, and enabling the reducing section of the second positioning piece to penetrate out through the first end of the positioning hole; then, axially abutting the connecting bolt against the diameter-changing section of the second positioning piece, knocking the connecting bolt until the second positioning piece is ejected out, wherein one end of the connecting bolt penetrates through the second end of the positioning hole, and the end head of the other end of the connecting bolt abuts against the end face of the first end of the positioning hole; and finally, fixing the connecting bolt and the fixing nut, and connecting the paddle root connecting piece, the paddle jacket and the paddle into a whole.

Therefore, compared with the existing scheme that the connecting bolt directly penetrates out of the first end of the positioning hole and the second end of the positioning hole, the helicopter blade connecting bolt mounting tool can quickly align the through hole positions of the blade root connecting piece, the blade jacket and the blade through the first positioning piece and the second positioning piece to form the positioning hole in an ideal state, mount the connecting bolt and greatly improve the assembly efficiency.

Optionally, the head portion is connected with the equal-diameter section along the axial direction, and the diameter of the head portion is larger than that of the equal-diameter section.

Optionally, the peripheral wall of one end of the constant diameter section connected with the head is provided with a first groove extending along the circumferential direction.

Optionally, the tapered section peripheral wall is provided with a second groove extending in the circumferential direction.

Optionally, at least one of the first connecting piece and the second connecting piece is further provided with a threaded section axially connected with the reducing section, and the diameter of the threaded section is smaller than that of the equal-diameter section.

Optionally, a third groove extending in the circumferential direction is further provided at the junction of the threaded section and the reducer section.

Optionally, the first and second connectors are made of bolts.

The invention also provides a helicopter blade connecting bolt mounting method, which comprises a positioning hole alignment method, wherein the positioning hole alignment method comprises the following steps:

inserting a first positioning piece into the propeller root connecting piece, the propeller jacket and the propeller blade from the first end of the positioning hole in sequence, and enabling the diameter-variable section part of the first positioning piece to penetrate out of the second end of the positioning hole;

and axially abutting the reducing section of the second positioning piece with the reducing section of the first positioning piece, knocking the second positioning piece until the first positioning piece is ejected out, and enabling the reducing section part of the second positioning piece to penetrate out through the first end of the positioning hole.

The method for installing the connecting bolt of the helicopter blade is suitable for the installation tool of the connecting bolt of the helicopter blade, so that the method has the same technical effect as the connecting bolt of the helicopter blade, and the details are not repeated.

Optionally, when the second positioning element is provided with a threaded section axially connected with the reducer section, the second positioning element serves as a connecting bolt; when the second positioning member does not include a threaded section, the method for installing the helicopter blade connecting bolt further comprises:

and axially abutting a connecting bolt with the reducing section of the second positioning part, knocking the connecting bolt until one end of the connecting bolt penetrates out of the second end of the positioning hole, and abutting the end head of the other end of the connecting bolt against the end face of the first end of the positioning hole.

Drawings

FIG. 1 is a schematic structural view of a first positioning member in one embodiment of a helicopter blade attachment bolt installation tool provided in accordance with the present invention;

FIG. 2 is a schematic structural view of a second positioning member in one embodiment of the helicopter blade attachment bolt installation tool of the present invention;

FIG. 3 is a schematic structural view of the first positioning member shown in FIG. 1 and the second positioning member shown in FIG. 2 during operation;

wherein the reference numerals of fig. 1 to 3 are explained as follows:

1-a first positioning member; 2-a second positioning element; 11-equal diameter section; 12-a variable diameter section; 12' -a reducing section; 13-a head; 14-a threaded segment; 1 a-a first groove; 1 b-a second groove; 1 c-a third groove;

01-a blade root connector; 02-blade jacket; 03-paddle.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The terms "first," "second," and the like, herein are used for convenience in describing two or more structures or components that are identical or similar in structure and/or function and do not denote any particular limitation in order and/or importance.

The through holes for installing the connecting bolts, which are communicated with the corresponding positions of the blade root connector 01, the blade jacket 02 and the blade 03, are integrally defined as positioning holes.

Referring to fig. 1 to 3, fig. 1 is a schematic structural view of a first positioning member in an embodiment of a mounting tool for a connecting bolt of a helicopter blade according to the present invention; FIG. 2 is a schematic structural view of a second positioning member in one embodiment of the helicopter blade attachment bolt installation tool of the present invention; fig. 3 is a schematic structural view of the first positioning member in fig. 1 and the second positioning member in fig. 2 during operation.

The invention provides a mounting tool for a connecting bolt of a helicopter blade, which comprises a first positioning piece 1 and a second positioning piece 2, wherein the first positioning piece 1 and the second positioning piece 2 respectively comprise an equal-diameter section 11 and a reducing section which are axially connected, the diameter of the equal-diameter section 11 is matched with that of a positioning hole in a theoretical machining state, and the diameter of the reducing section is gradually reduced from one end connected with the equal-diameter section 11 to the direction far away from the equal-diameter section 11.

The invention provides a mounting tool for connecting bolts of a helicopter blade, which comprises the following steps of: firstly, inserting a first positioning piece 1 into a propeller root connecting piece 01, a propeller blade jacket 02 and a propeller blade 03 from a first end of a positioning hole in sequence, and enabling a diameter-changing section 12 part of the first positioning piece 1 to penetrate out through a second end of the positioning hole; secondly, axially abutting the reducing section 12 'of the second positioning piece 2 against the reducing section 12 of the first positioning piece 1, knocking the second positioning piece 2 by a rubber hammer until the first positioning piece 1 is ejected out, and enabling the reducing section 12' part of the second positioning piece 2 to penetrate out through the first end of the positioning hole; then, axially abutting the connecting bolt against the reducing section 12' of the second positioning piece 2, knocking the connecting bolt until one end of the connecting bolt penetrates out of the second end of the positioning hole, and abutting the end head of the other end of the connecting bolt against the end face of the first end of the positioning hole; finally, the connecting bolt is fixed with the fixing nut, and the paddle root connecting piece 01, the paddle jacket 02 and the paddle 03 are connected into a whole.

Therefore, the mounting tool for the connecting bolt of the helicopter blade can quickly align the through holes of the root connecting piece 01, the blade jacket 02 and the blade 03 through the first positioning piece 1 and the second positioning piece 2 to form positioning holes in an ideal state, mount the connecting bolt and greatly improve the assembly efficiency.

Specifically, in the present embodiment, the first positioning element 1 and the second positioning element 2 further include a head portion 13 axially connected to the equal-diameter section 11, and the diameter of the head portion 13 is larger than that of the equal-diameter section 11.

The device is used for providing a bearing surface to bear the acting force of the rubber hammer on one hand; on the other hand, the positioning device can also play a role in limiting, and prevents the first positioning piece 1 and the second positioning piece 2 from being completely inserted into the positioning hole and being incapable of being taken out.

Further, in the present embodiment, the peripheral wall of the end of the constant diameter section 11 connected to the head 13 is provided with a first groove 1a extending along the circumferential direction, and the first groove 1a is a process groove and is convenient for processing.

In addition, the peripheral wall of the reducing section 12 is also provided with a second groove 1b extending along the circumferential direction, and the second groove 1b is a process groove and is convenient to machine.

With continued reference to fig. 2, in the present embodiment, the second connecting member 2 is further provided with a threaded section 14 axially connected to the reducing section 12', and the diameter of the threaded section 14 is smaller than that of the equal-diameter section 11.

In the arrangement, in the process of installing the connecting bolt, the first positioning piece 1 can be firstly inserted into the propeller root connecting piece 01, the propeller jacket 02 and the propeller 03 from the first end of the positioning hole in sequence, and the diameter-changing section 12 part of the first positioning piece 1 penetrates out from the second end of the positioning hole; secondly, the reducing section 12' of the second positioning piece 2 is abutted against the reducing section 12 of the first positioning piece 1, and the second positioning piece 2 is knocked by a rubber hammer until the first positioning piece 1 is ejected out; then, the second positioning piece 2 is continuously knocked to enable the threaded section 14 to penetrate out of the first end of the positioning hole and be fixed with the fixing nut, and the paddle root connecting piece 01, the paddle jacket 02 and the paddle 03 are connected into a whole.

The setting can further simplify the installation steps and improve the installation efficiency.

Certainly, when the root connector 01, the blade jacket 02 and the blade 03 are connected through the second positioning part 2, the structural strength of the second positioning part 2 needs to be calculated, so that the root connector 01, the blade jacket 02 and the blade 03 can be stably connected into a whole, and safety accidents caused by fracture are avoided. In this embodiment, the length of the variable diameter section 12 'of the second positioning member 2 is smaller than the length of the variable diameter section 12 of the first positioning member 1, so as to prevent the variable diameter section 12' from being too thin and broken. Thus, the first and second locating members 1, 2 may be identical in construction when the second locating member is not provided with a threaded section 14.

In this embodiment, the second positioning element 2 is provided with the threaded section 14, and in practical application, the threaded section 14 may be provided on the first positioning element 1, at this time, in the installation process, the second positioning element 2 may be installed first, then the first positioning element 1 is installed, the second positioning element 2 is knocked out of the positioning hole, and the paddle root connector 01, the paddle jacket 02 and the paddle 03 are connected through the second positioning element 2. Or, the threaded sections 14 are provided on both the first positioning member 1 and the second positioning member 2, and at this time, in the installation process, the installation sequence of the first positioning member 1 and the second positioning member 2 does not need to be limited.

Furthermore, the junction of the threaded section 14 and the reducer section 12' is provided with a third axially extending groove 1 c. The arrangement is mainly due to the process consideration, and the processing is convenient.

In this embodiment, the first connecting member 1 and the second connecting member 2 are made of existing bolts, and the process is simple. In practical application, a cylindrical shaft body can be processed into the first connecting piece 1 and the second connecting piece 2.

The invention also provides a helicopter blade connecting bolt mounting method, which comprises a positioning hole alignment method, wherein the positioning hole alignment method comprises the following steps:

inserting the first positioning piece 1 into the propeller root connecting piece 01, the propeller jacket 02 and the propeller 03 from the first end of the positioning hole in sequence, and enabling the diameter-variable section 12 part of the first positioning piece 1 to penetrate out through the second end of the positioning hole;

the diameter-changing section 12 'of the second positioning piece 2 is axially abutted against the diameter-changing section 12 of the first positioning piece 1, the second positioning piece 2 is knocked until the first positioning piece 1 is ejected out, and the diameter-changing section 12' of the second positioning piece 2 partially penetrates out through the first end of the positioning hole.

The method for installing the connecting bolt of the helicopter blade is suitable for the installation tool of the connecting bolt of the helicopter blade, so that the method has the same technical effect as the connecting bolt of the helicopter blade, and the details are not repeated.

Further, when the second positioning member 2 is provided with the threaded section 14 axially connected with the reducer section 12', the second positioning member may serve as a connecting bolt; when the second locating member 2 does not include the threaded section 14, the method of installing a helicopter blade attachment bolt further comprises:

and axially abutting the connecting bolt against the reducing section 12' of the second positioning part 2, knocking the connecting bolt until one end of the connecting bolt penetrates out of the second end of the positioning hole, and abutting the end head of the other end of the connecting bolt against the end face of the first end of the positioning hole.

The tool and the method for installing the connecting bolt of the helicopter blade provided by the invention are described in detail, the principle and the embodiment of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.