CN116214431A

CN116214431A - Integrated taper pin disassembling tool

Info

Publication number: CN116214431A
Application number: CN202211708077.5A
Authority: CN
Inventors: 吕庆华; 李志伟; 李力坤; 谢磊; 童安平; 万天才
Original assignee: AVIC Chengdu Aircraft Design and Research Institute
Current assignee: AVIC Chengdu Aircraft Design and Research Institute
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-06

Abstract

The invention discloses an integrated taper pin disassembling tool, which comprises a U-shaped clamping block, an ejection nut and a set screw, wherein: the U-shaped clamping block comprises a block body, a first internal threaded hole is formed in the block body, and a through groove is formed from the rear end of the block body to the first internal threaded hole, so that a U-shaped structure is formed; a clamping groove matched with the dismounting notch on the outer wall of the conical bushing is processed on the bottom surface of the U-shaped clamping block; the inner part of the ejection nut is axially provided with a second internal thread hole matched with the external thread of the set screw, the outer surface of the ejection nut is divided into an upper part and a lower part, the upper part is of an external hexagonal structure, and the lower part is of a first external thread matched with the first internal thread hole on the U-shaped clamping block; the external surface of the set screw is a second external thread matched with a second internal thread hole on the ejector nut, the upper end of the set screw is provided with a straight slot, and the lower end of the set screw is an external conical surface matched with an end surface conical hole of a conical pin thread section.

Description

Integrated taper pin disassembling tool

Technical Field

The invention relates to the technical field of flight control, in particular to an integrated taper pin dismounting tool.

Background

The end of fly-control actuators for fly-by-wire aircraft typically employ tapered connection of tapered holes with self-lubricating tapered pins and tapered bushings, as shown in fig. 1, to reduce the clearance of the control surface system. In the use and maintenance of the actuator, the taper connection fastener portion needs to be detached first, and then the actuator to be maintained is removed, and the detachment sequence of the taper pin fastening portion is shown in fig. 2, and is generally as follows:

pulling out the cotter pin; unscrewing the nut; and (3) taking down the gasket, ejecting the conical bushing by means of a linear cutter to prop against the dismounting notch part of the conical bushing, lightly knocking the threaded end of the conical pin along the conical surface direction of the conical pin by using a wooden hammer, enabling the conical surface of the pin to withdraw from the conical hole, and pulling out the conical pin.

Under the action of long-term heavy load, the taper bush, the taper pin, the taper hole and the like generate fretting wear, are tightly attached, and can not eject the taper bush only by using a straight-line cutter, so that the taper pin can not be pulled out, the taper bush and the taper pin are difficult to detach, and the maintenance of the aircraft actuator is influenced

In the external field, in order to detach the conical bushing, a hammer is required to strike the head of the conical pin to generate enough impact force, so that the conical bushing loosens in the conical hole, and the conical bushing is convenient to take out. In order to protect the taper pin, when the disassembling space is large enough, a wooden hammer is usually used during knocking, but the installation space of the aircraft actuator is usually narrow, so that the knocking stroke of the wooden hammer is insufficient, and the force is insufficient to shake loose the connecting structure. At this time, only the metal hammer can be used for knocking the conical bushing in a short distance, and the conical bushing is loosened in the conical hole by utilizing the impact force of multi-frequency knocking. However, when the metal hammer is used for knocking the head of the taper pin, the taper pin is easy to damage, so that the head of the taper pin is deformed, the taper pin cannot be reused after being taken out, the taper pin is additionally damaged for maintaining the actuator, and the time and economic cost are high, and the maintainability is extremely poor.

Disclosure of Invention

The invention aims to provide an integrated taper pin disassembling tool which is used for solving the problems that a taper pin is easy to damage and disassembling is inconvenient in the existing disassembling method.

In order to realize the tasks, the invention adopts the following technical scheme:

the utility model provides an integral type taper pin extracting tool, includes U-shaped fixture block, ejector nut and holding screw, wherein:

the U-shaped clamping block comprises a block body, a first internal threaded hole is formed in the block body, and a through groove is formed from the rear end of the block body to the first internal threaded hole, so that a U-shaped structure is formed; a clamping groove matched with the dismounting notch on the outer wall of the conical bushing is processed on the bottom surface of the U-shaped clamping block;

the inner part of the ejection nut is axially provided with a second internal threaded hole matched with the set screw, the outer surface of the ejection nut is divided into an upper part and a lower part, the upper part is of an external hexagonal structure, and the lower part is provided with a first external thread matched with the first internal threaded hole on the U-shaped clamping block;

the external surface of the set screw is a second external thread matched with a second internal thread hole on the ejector nut, the upper end of the set screw is provided with a straight slot, and the lower end of the set screw is an external conical surface matched with an end surface conical hole of a conical pin thread section.

Further, the cross section of draw-in groove is C shape structure, and the draw-in groove is the U-shaped and arranges around first internal thread hole, including last draw-in groove, left draw-in groove and right draw-in groove, be used for respectively with the cooperation of the dismantlement breach of different positions on the toper bush.

Further, guide grooves are formed from the rear end of the block body to the left clamping groove and the right clamping groove.

Further, the diameter of the first internal threaded hole is larger than the width of the through groove, the width of the through groove is smaller than the outer diameter of the conical bushing, and the width of the through groove is larger than the outer diameter of the threaded section of the tail end of the conical pin.

Further, the dismounting notches are arranged in a plurality in the circumferential direction at the end of the outer wall of the tapered bushing, and at least one pair of dismounting notches are spaced 180 ° apart in the circumferential direction.

Further, the tail end of the taper pin is a threaded section, and an end face taper hole is formed in the threaded section.

Further, the ear ring at the end part of the actuator is arranged on the fixing frame through the taper pin, a group of opposite head taper holes and tail taper holes are formed in the fixing frame, the taper pin penetrates through the head taper holes and then penetrates through the ear ring at the end part of the actuator, then penetrates through the tail taper holes, a taper bushing is arranged in the tail taper holes, and then the taper pin is fixed through the fastening nut and the opening pin.

The disassembly method of the disassembly tool comprises the following steps:

step 1, pulling out a cotter pin on a taper pin, and then unscrewing a fastening nut on the taper pin;

step 2, pushing the U-shaped clamping block through the guide of the guide groove, so that the U-shaped clamping block is clamped on the dismounting notch on the conical bushing;

step 3, screwing the ejection nut into a first internal threaded hole of the U-shaped clamping block;

step 4, screwing the set screw into a second internal threaded hole of the ejector nut, and rotating the set screw to an end face taper hole of a conical pin thread section contacted by an external conical surface at the lower end of the set screw by using a straight line-shaped changing knife;

step 5, using a spanner to rotate the ejection nut until the conical bushing loosens, and taking down the bushing;

and 6, pulling out the taper pin along the axial direction of the taper pin.

Compared with the prior art, the invention has the following technical characteristics:

according to the invention, the annular groove of the U-shaped clamping block is used for clamping the dismounting notch of the conical bushing, the ejector nut and the set screw are matched, the tightening moment is applied to the ejector nut by utilizing the constraint counter force of the conical bushing and the pin, the quick dismounting of the conical bushing and the conical pin is realized on the basis of not using other structural members by reasonably utilizing the constraint of the bushing and the matched connecting pin, and the maintenance requirement of the aircraft actuator is met; in the scheme, the U-shaped clamping block is small in size and suitable for a narrow space of an aircraft; the structure of the U-shaped clamping block is convenient for installation at the notch of the conical bushing; the ejection nut, the U-shaped clamping block and the set screw are fastened and connected through threads, so that the installation is facilitated; the constraint counter force between the connecting fasteners is utilized, so that the head of the taper pin is not required to be knocked, and the taper pin is not damaged; the tool is convenient to install, can be operated by using an ordinary wrench, and can realize reliable and rapid disassembly of the fastener.

Drawings

FIG. 1 is an actuator end mounting structure;

FIG. 2 is an exploded view of the taper pin removal process;

FIG. 3 is an exploded view of the removal tool of the present invention;

FIG. 4 is a schematic view of the construction of the removal tool of the present invention;

FIG. 5 is a schematic view showing the operation of the tool according to the present invention.

The reference numerals in the figures illustrate: a1 mount, A2 taper pin, A3 head taper hole, A4 afterbody taper hole, A5 taper bush, A6 fastening nut, A7 cotter pin, A8 actuator tip earring, A21 screw thread section, A22 terminal surface taper hole, A51 dismantlement breach, 1U-shaped fixture block, 2 ejector nut, 3 holding screw, 11 first internal thread hole, 12 logical groove, 13 draw-in groove, 14 left draw-in groove, 15 upper draw-in groove, 16 right draw-in groove, 17 guide way, 21 second internal thread hole, 22 first external screw thread, 23 external hexagonal structure, 31 second external screw thread, 32 external cone, 33 straight notch.

Detailed Description

Referring to the drawings, the invention provides an integrated taper pin dismounting tool, the applied scene of the dismounting tool is shown in fig. 1, an actuator end earring A8 is mounted on a fixed frame A1 through a taper pin A2, a group of opposite head taper holes A3 and tail taper holes A4 are formed on the fixed frame A1, the taper pin A2 passes through the head taper holes A3 and then passes through the actuator end earring A8 and then passes through the tail taper holes A4, a taper bushing A5 is arranged in the tail taper holes A4, and then the taper pin A2 is fixed through a fastening nut A6 and a cotter pin A7 so as to realize the mounting of a flight control actuator; the tail end of the taper pin A2 is a threaded section A21, and an end face taper hole A22 is formed in the threaded section A21; the outer wall of the conical bushing A5 is provided with a plurality of dismounting notches a51, in this embodiment, a plurality of dismounting notches a51 are arranged at the end part of the outer wall of the conical bushing A5 along the circumferential direction, and at least one pair of dismounting notches a51 are spaced 180 ° apart in the circumferential direction; as in the example of fig. 2, the dismounting notches a51 are arranged four apart by 90 °.

Referring to fig. 3 and 4, the dismounting tool of the present invention comprises three parts, namely a U-shaped clamping block 1, an ejector nut 2 and a set screw 3, wherein:

the U-shaped clamping block 1 comprises a block body, wherein a first internal threaded hole 11 is formed in the block body, and a through groove 12 is formed from the rear end of the block body to the first internal threaded hole 11, so that a U-shaped structure is formed; a clamping groove 13 which is used for being matched with a dismounting notch A51 on the outer wall of the conical bushing A5 is processed on the bottom surface of the U-shaped clamping block 1; the cross section of the clamping groove 13 is of a C-shaped structure, the clamping groove 13 is arranged around the first internal threaded hole 11 in a U shape and comprises an upper clamping groove 15, a left clamping groove 14 and a right clamping groove 16 which are respectively used for being matched with dismounting notches A51 at different positions on the conical bushing A5 to form a force application surface; guide grooves 17 are formed from the rear end of the block to the left and

right clamping grooves

14, 16.

Optionally, the diameter of the first internal threaded hole 11 is greater than the width of the through groove 12, the width of the through groove 12 is smaller than the outer diameter of the tapered bushing A5 and greater than the outer diameter of the threaded section a21 at the tail end of the tapered pin A2, so that the U-shaped clamping block 1 can be conveniently clamped into the outside of the tail end of the tapered pin A2 through the through groove 12 when being installed.

The inside of the ejection nut 2 is provided with a second internal thread hole 21 which is matched with the external thread of the set screw 3 along the axial direction, the outer surface is divided into an upper part and a lower part, the upper part is an external hexagonal structure 23 which is used for being matched with a spanner, and the lower part is a first external thread 22 which is matched with the first internal thread hole 11 on the U-shaped clamping block 1.

The outer surface of the set screw 3 is a second external thread 31 matched with the second internal thread hole 21 on the ejector nut 2, the upper end of the set screw 3 is provided with a straight notch 33, and the lower end is an external conical surface 32 matched with the end surface conical hole A22 of the conical pin A2 thread section A21.

Referring to fig. 5, the working principle of the present invention is:

the guide groove 17 is used for guiding, 2-3 dismounting notches A51 of the conical bushing A5 are clamped through clamping grooves 13 which are arranged in a U shape on the U-shaped clamping block 1, the ejection nut 2 is screwed into the first internal threaded hole 11, the set screw 3 is screwed into the second internal threaded hole 21 on the ejection nut 2, the straight line-shaped change knife is used for being inserted into the straight line-shaped notch 33 on the set screw 3 and rotated until the outer conical surface 32 at the lower end of the set screw 3 contacts with the end face conical hole A22 of the threaded section A21 of the conical pin A2, after the ejection nut 2 is rotated by a spanner, a screwing torque is applied to the ejection nut 2, the ejection nut 2 drives the set screw 3 to push the conical pin A2 along the axial direction, and the U-shaped clamping block 1 is clamped with the conical bushing A5 along the axial direction, so that the quick dismounting of the conical bushing A5 and the conical pin A2 can be realized by utilizing the constraint reaction force of the conical bushing A5 and the conical pin A2. When the U-shaped clamping block 1 is used, the left clamping groove 14 and the right clamping groove 16 of the U-shaped clamping block must clamp two dismounting notches A51 which are spaced 180 degrees apart on the conical bushing A5; the conical bushing A5 corresponding to the clamping groove 15 is provided with a dismounting notch A51, so that the upper clamping groove 15 is used for clamping, otherwise, the effective fixation can be realized only through the left clamping groove 14 and the right clamping groove 16 without using the upper clamping groove 15.

The disassembly steps using the tool of the invention are:

step 1, pulling out a cotter pin A7 on a taper pin A2, and then unscrewing a fastening nut A6 on the taper pin A2;

step 2, pushing the U-shaped clamping block 1 through the guide of the guide groove 17, so that the U-shaped clamping block 1 is clamped by the dismounting notch A51 on the conical bushing A5;

step 3, screwing the ejection nut 2 into the first internal threaded hole 11 of the U-shaped clamping block 1;

step 4, screwing the set screw 3 into the second internal threaded hole 21 of the ejector nut 2, and using a straight line-shaped screwdriver to rotate the set screw 3 until the external conical surface 32 at the lower end of the set screw 3 contacts the end surface conical hole A22 of the threaded section A21 of the conical pin A2;

step 5, using a spanner to rotate the ejection nut 2 until the conical bushing A5 is loosened, and taking down the bushing;

and 6, pulling out the taper pin A2 along the axial direction of the taper pin A2.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced equally; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and are intended to be included within the scope of the present application.

Claims

1. The utility model provides an integral type taper pin extracting tool which characterized in that, includes U-shaped fixture block (1), ejector nut (2) and holding screw (3), wherein:

the U-shaped clamping block (1) comprises a block body, a first internal threaded hole (11) is formed in the block body, and a through groove (12) is formed from the rear end of the block body to the first internal threaded hole (11), so that a U-shaped structure is formed; a clamping groove (13) which is used for being matched with a dismounting notch (A51) on the outer wall of the conical bushing (A5) is processed on the bottom surface of the U-shaped clamping block (1);

the inner part of the ejection nut (2) is axially provided with a second internal threaded hole (21) matched with the set screw (3), the outer surface of the ejection nut is divided into an upper part and a lower part, the upper part is of an external hexagonal structure (23), and the lower part is of a first external thread (22) matched with the first internal threaded hole (11) on the U-shaped clamping block (1);

the outer surface of the set screw (3) is a second external thread (31) matched with a second internal thread hole (21) on the ejection nut (2), a straight notch (33) is arranged at the upper end of the set screw (3), and an external conical surface (32) matched with an end surface conical hole (A22) of a thread section (A21) of the conical pin (A2) is arranged at the lower end of the set screw.

2. The integrated taper pin disassembling tool according to claim 1, wherein the cross section of the clamping groove (13) is of a C-shaped structure, the clamping groove (13) is arranged around the first internal threaded hole (11) in a U shape, and comprises an upper clamping groove (15), a left clamping groove (14) and a right clamping groove (16) which are respectively used for being matched with disassembling notches (a 51) at different positions on the taper bush (A5).

3. The integrated taper pin removal tool according to claim 2, wherein guide grooves (17) are formed from the rear end of the block body to the left and right catching grooves (14, 16).

4. The integrated taper pin removal tool of claim 1, wherein the diameter of the first internally threaded bore (11) is greater than the width of the through slot (12), the width of the through slot (12) being less than the outer diameter of the taper bush (A5) and greater than the outer diameter of the threaded section (a 21) of the tail end of the taper pin (A2).

5. The integrated taper pin removal tool according to claim 1, wherein the removal notches (a 51) are arranged in a plurality in a circumferential direction at an end portion of the outer wall of the taper bush (A5), and at least a pair of removal notches (a 51) are provided at a spacing of 180 ° in the circumferential direction.

6. The integrated taper pin removal tool according to claim 1, wherein the tapered pin (A2) has a threaded section (a 21) at a tail end, and an end face taper hole (a 22) is formed in the threaded section (a 21).

7. The integrated taper pin removal tool according to claim 1, wherein the actuator end earring (A8) is mounted on the fixing frame (A1) through a taper pin (A2), a set of opposite head taper holes (A3) and tail taper holes (A4) are formed in the fixing frame (A1), the taper pin (A2) passes through the head taper holes (A3) and then passes through the actuator end earring (A8) and then passes through the tail taper holes (A4), a taper bushing (A5) is arranged in the tail taper holes (A4), and then the taper pin (A2) is fixed through a fastening nut (A6) and a cotter pin (A7).

8. The integrated taper pin removal tool of claim 1, wherein the removal method of the removal tool is:

step 1, pulling out a cotter pin (A7) on a taper pin (A2), and then unscrewing a fastening nut (A6) on the taper pin (A2);

step 2, pushing the U-shaped clamping block (1) through the guide of the guide groove (17) so that the U-shaped clamping block (1) is clamped by the dismounting notch (A51) on the conical bushing (A5);

step 3, screwing the ejection nut (2) into a first internal threaded hole (11) of the U-shaped clamping block (1);

step 4, screwing the set screw (3) into a second internal threaded hole (21) of the ejector nut (2), and rotating the set screw (3) to an end face taper hole (A22) of a threaded section (A21) of the taper pin (A2) by using a straight-line screwdriver, wherein an external taper surface (32) at the lower end of the set screw (3) contacts the end face taper hole;

step 5, using a spanner to rotate the ejection nut (2) until the conical bushing (A5) is loosened, and taking down the bushing;

and 6, axially pulling out the taper pin (A2) along the taper pin (A2).