Disassembly-free coaxial reaming tool and method suitable for multi-specification machine

Abstract

The invention belongs to the field of aircraft assembling and manufacturing, and provides a disassembly-free coaxial reaming tool and method suitable for multi-specification aircrafts. And the device is suitable for the disassembly-free in-situ coaxial broaching of the double-lug type support with the multi-specification hole diameter on the machine. The guider is matched with different support lug gaps, the drill bushing system is matched with different reaming apertures, and the variable-diameter guide pin can freely adjust the diameter of an inner guide rod. And the coaxiality of double-lug bracket holes with different specifications after reaming on a machine can be ensured. According to the device, the situation that the coaxiality error is enlarged when a support with the coaxiality requirement is subjected to broaching on a machine can be effectively avoided, dismounting operation caused by coaxial broaching in the assembling and maintaining process is effectively reduced, and the problem that the number of carried tools is too large due to different specifications of hole diameters in the operation process is solved by replacing accessories. And the economic consumption is reduced while the working efficiency of an operator is improved.

Description

Technical Field

[0001] This invention belongs to the field of aircraft assembly and manufacturing, and provides a coaxial reaming tool and method applicable to multiple specifications of aircraft without disassembly. Background Technology

[0002] Aircraft design and development is a complex, highly integrated, and lengthy systems engineering project. Due to this characteristic, during aircraft assembly and manufacturing, it is common for completed products to require modifications such as enlarging holes according to the design. Modern aircraft structures extensively use double-ear brackets as connectors for motion mechanisms. These brackets typically consist of two parallel lugs with coaxial mounting holes, such as... Figure 1 As shown. Due to long-term service wear, accumulated assembly errors, or accidental damage, the coaxiality of the two holes in this type of bracket may exceed tolerances, leading to pin jamming or accelerated wear, affecting flight safety. Therefore, the development and research of onboard coaxial hole enlarging tools that do not require disassembly can greatly improve work efficiency and save economic costs.

[0003] Traditional methods for enlarging and coaxializing aircraft-mounted double-ear brackets require disassembling the components for modification. This disassembly process is complex, and in some aircraft, the limited space makes it extremely costly. While existing handheld enlarging tools like reamers allow for in-situ operation, enlarging each hole individually amplifies coaxiality errors, making it impossible to guarantee coaxiality between both holes. Furthermore, a single tool is only suitable for a specific hole diameter, and given the diverse hole diameters of aircraft ear plates, a large number of tools must be carried during the work. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a coaxial reaming tool and method applicable to multiple specifications of machines without disassembly. The specific technical solution is as follows:

[0005] According to one aspect of this application, a multi-specification on-machine non-disassembly coaxial reaming tool is provided for coaxial reaming of a double-ear type bracket;

[0006] This machine is compatible with various sizes of double-ear brackets for in-situ coaxial reaming without disassembly. It features guides to accommodate different bracket lug gaps, a drill bushing system to accommodate different reaming diameters, and adjustable guide pins that allow free adjustment of the inner guide rod diameter. This ensures coaxiality after reaming holes of different sizes of double-ear brackets on the machine.

[0007] It consists of a guide 1, a pressure rod 2, a pressure rod 3, a bushing 4, a variable diameter guide pin 5, a variable diameter inner guide rod 6, a detachable outer guide rod 7, a connecting threaded sleeve 8, a ring 9, a support surface 10, and a slide rod 11.

[0008] The guide 1 is in the shape of two ears and is provided with a sliding groove, a keyway and a hole groove. The pressure rod 2 and pressure rod 3 are arranged in parallel in the sliding groove.

[0009] The inner end of the pressure rods 2 and 3 has a layer of anti-slip rubber pad, which can be adjusted to adapt to different ear spacings. The guide 1 and the ear of the double-ear bracket are fixedly connected by the locking nut on the outer end of the pressure rods 2 and 3.

[0010] The inner diameter of the bushing 4 matches the standard hole-reaming tool and is graded according to the standard hole diameter specifications. The outer diameter matches the two slots on the inner and outer ears of the guide 1.

[0011] The outer wall of the bushing 4 is provided with a guide key, which cooperates with the keyway of the guide to transmit torque and prevent circumferential rotation in order to fix the bushing 4.

[0012] The variable diameter guide pin 5 is composed of a variable diameter inner guide rod 6 and multiple sets of detachable outer guide rods 7;

[0013] The variable diameter inner guide rod 6 is composed of a connecting threaded sleeve 8, a support surface 10, and a slide rod 11, which are connected by an intersection shaft.

[0014] The detachable outer guide rod 7 is provided with threads, a boss and a ring 9 with lugs. The ring 9 is connected to the support surface 10 through the slide rod 11. When the detachable outer guide rod 7 is screwed into the connecting threaded sleeve 8, the boss can apply a supporting force to the slide rod 11 to open the support surface 10 so that its outer diameter conforms to the hole diameter of the double-ear bracket.

[0015] The diameter of the detachable outer guide rod 7 matches the inner diameter of the bushing 4;

[0016] The sliding support mechanism consisting of the support surface 10 and the slide rod 11 is connected to the detachable outer guide rod 7 on one side via a ring buckle 9, and fixed on the threaded sleeve of the variable diameter inner guide rod 6 on the other side. The support surface 10 can be unfolded and retracted by turning the detachable outer guide rod 7.

[0017] According to another aspect of this application, a method for coaxial enlargement of a double-ear type bracket is provided, which uses the above-mentioned applicable multi-specification machine-mounted non-disassembly coaxial enlargement tool.

[0018] Includes the following steps:

[0019] Step 1: Select the appropriate bushing 4 and detachable outer guide rod 7 according to the diameter of the hole after the double-ear bracket is enlarged. Install the two bushings 4 into the slots on both sides of the guide 1, and rotate the detachable outer guide rod 7 onto the variable diameter guide pin 5.

[0020] Step 2: Insert the guide 1 into the double-ear bracket that needs to be enlarged. At this time, the two ears of the guide 1 are placed crosswise with the two ears of the double-ear bracket.

[0021] Step 3: Insert the variable diameter guide pin 5 into the guide 1 and the double ear bracket hole along with the bushing 4. Rotate the removable outer guide rod 7 to open the support surface 10 of the variable diameter inner guide rod 6 and fit it tightly with the double ear bracket hole. At this time, the outer diameter of the variable diameter inner guide rod 6 is consistent with the inner diameter of the double ear bracket hole, the removable outer guide rod 7 is consistent with the inner diameter of the bushing 4, and the bushing 4 is coaxial with the double ear bracket hole.

[0022] Step 4: Use pressure rods 2 and 3 to ensure that the ear piece of guide 1 fits tightly with the ear piece of the double-ear bracket, and tighten the stop nut to fix the two together;

[0023] Step 5: Rotate the outer guide rod 7 in the opposite direction to remove the variable diameter guide pin 5;

[0024] Step 6: Use a reamer or other reaming tools to enlarge the hole in the double-ear bracket through bushing 4.

[0025] The advantages of this application are:

[0026] This machine is compatible with various sizes of double-ear brackets for in-situ coaxial reaming without disassembly. It features guides to accommodate different bracket lug gaps, a drill bushing system to accommodate different reaming diameters, and adjustable guide pins that allow free adjustment of the inner guide rod diameter. This ensures coaxiality after reaming holes of different sizes of double-ear brackets on the machine.

[0027] This invention effectively avoids amplifying coaxiality errors when enlarging holes in brackets requiring coaxiality on the machine, effectively reducing disassembly work during assembly and maintenance caused by coaxial hole enlargement, and eliminating the problem of excessive tooling due to different hole diameters during operation by replacing parts. It improves operator efficiency while reducing economic costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a binaural support.

[0029] Figure 2 This is the main view of the tool structure.

[0030] Figure 3 This is a side view of the tool structure.

[0031] Figure 4 This is a schematic diagram of a variable diameter guide pin structure.

[0032] Figure 5 This is a schematic diagram of the disassembly of the variable diameter guide pin.

[0033] Among them, 1 guide, 2 pressure rod, 3 pressure rod, 4 bushing, 5 variable diameter guide pin, 6 variable diameter inner guide rod, 7 detachable outer guide rod, 8 threaded sleeve, 9 ring, 10 support surface, and 11 slide rod. Detailed Implementation

[0034] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0035] Example 1

[0036] A coaxial reaming tool applicable to multiple specifications of machines without disassembly, used for coaxial reaming of double-ear type brackets;

[0037] This machine is compatible with various sizes of double-ear brackets for in-situ coaxial reaming without disassembly. It features guides to accommodate different bracket lug gaps, a drill bushing system to accommodate different reaming diameters, and adjustable guide pins that allow free adjustment of the inner guide rod diameter. This ensures coaxiality after reaming holes of different sizes of double-ear brackets on the machine.

[0038] It consists of a guide 1, a pressure rod 2, a pressure rod 3, a bushing 4, a variable diameter guide pin 5, a variable diameter inner guide rod 6, a detachable outer guide rod 7, a connecting threaded sleeve 8, a ring 9, a support surface 10, and a slide rod 11.

[0039] The guide 1 is in the shape of two ears and is provided with a sliding groove, a keyway and a hole groove. The pressure rod 2 and pressure rod 3 are arranged in parallel in the sliding groove.

[0040] The inner end of the pressure rods 2 and 3 has a layer of anti-slip rubber pad, which can be adjusted to adapt to different ear spacings. The guide 1 and the ear of the double-ear bracket are fixedly connected by the locking nut on the outer end of the pressure rods 2 and 3.

[0041] The inner diameter of the bushing 4 matches the standard hole-reaming tool and is graded according to the standard hole diameter specifications. The outer diameter matches the two slots on the inner and outer ears of the guide 1.

[0042] The outer wall of the bushing 4 is provided with a guide key, which cooperates with the keyway of the guide to transmit torque and prevent circumferential rotation in order to fix the bushing 4.

[0043] The variable diameter guide pin 5 is composed of a variable diameter inner guide rod 6 and multiple sets of detachable outer guide rods 7;

[0044] The variable diameter inner guide rod 6 is composed of a connecting threaded sleeve 8, a support surface 10, and a slide rod 11, which are connected by an intersection shaft.

[0045] The detachable outer guide rod 7 is provided with threads, a boss and a ring 9 with lugs. The ring 9 is connected to the support surface 10 through the slide rod 11. When the detachable outer guide rod 7 is screwed into the connecting threaded sleeve 8, the boss can apply a supporting force to the slide rod 11 to open the support surface 10 so that its outer diameter conforms to the hole diameter of the double-ear bracket.

[0046] The diameter of the detachable outer guide rod 7 matches the inner diameter of the bushing 4;

[0047] The sliding support mechanism consisting of the support surface 10 and the slide rod 11 is connected to the detachable outer guide rod 7 on one side via a ring buckle 9, and fixed on the threaded sleeve of the variable diameter inner guide rod 6 on the other side. The support surface 10 can be unfolded and retracted by turning the detachable outer guide rod 7.

[0048] Step 1: The operator selects the appropriate drill bushing and variable diameter guide pin according to the diameter of the hole after the bracket is enlarged, installs the two drill bushings on the slots on both sides of the guide, and rotates the outer guide pin onto the variable diameter guide pin.

[0049] Step 2: The operator inserts the guide into the double-ear bracket that needs to be enlarged, at which point the two ears of the guide are placed crosswise with the two ears of the bracket.

[0050] Step 3: The operator inserts the variable diameter guide pin into the guide and support hole of the drill bushing, and rotates the outer guide rod to open the support surface of the inner guide rod and fit it tightly with the support hole. At this time, the outer diameter of the inner guide rod is consistent with the inner diameter of the support hole, the outer diameter of the outer guide rod is consistent with the inner diameter of the drill bushing, and the drill bushing and support hole are coaxial.

[0051] Step 4: The operator uses a pressure bar to ensure that the guide lugs and the bracket lugs fit tightly together, and tightens the stop nut to secure them together.

[0052] Step 5: Rotate the outer guide rod of the guide pin in the opposite direction to remove the guide pin.

[0053] Step 6: Use a reamer or other reaming tools to enlarge the hole in the bracket through a drill bushing.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions made by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A coaxial reaming tool applicable to multiple specifications of machines without disassembly, characterized in that, Coaxial enlargement for binaural brackets; It consists of a guide (1), a pressure rod (2), a pressure rod (3), a bushing (4), a variable diameter guide pin (5), a variable diameter inner guide rod (6), a detachable outer guide rod (7), a connecting threaded sleeve (8), a ring (9), a support surface (10), and a slide rod (11).

2. The applicable multi-specification on-machine non-disassembly coaxial reaming tool according to claim 1, characterized in that, The guide (1) is in the shape of a double ear and is provided with a sliding groove, a keyway and a hole groove. The pressure rod (2) and the pressure rod (3) are arranged in parallel in the sliding groove. The inner surface of the pressure rod (2) and pressure rod (3) has a layer of anti-slip rubber pad, which can be adjusted to adapt to different ear plate spacings, and the guide (1) and the ear plate of the double ear bracket are fixedly connected by the locking nut at the outer end of the pressure rod (2) and pressure rod (3); The inner diameter of the bushing (4) matches the standard hole-reaming tool and is graded according to the standard hole diameter specification. The outer diameter matches the two holes and grooves on the inner and outer ears of the guide (1). The outer wall of the bushing (4) is provided with a guide key, which cooperates with the keyway of the guide to transmit torque and prevent circumferential rotation in order to fix the bushing (4). The variable diameter guide pin (5) consists of a variable diameter inner guide rod (6) and multiple sets of detachable outer guide rods (7); The variable diameter inner guide rod (6) is composed of a connecting threaded sleeve (8), a support surface (10), and a slide rod (11), which are connected by an intersection shaft; The detachable outer guide rod (7) is provided with threads, bosses and rings (9) with lugs. The rings (9) are connected to the support surface (10) through the slide rod (11). When the detachable outer guide rod (7) is screwed into the connecting threaded sleeve (8), the boss can apply a supporting force to the slide rod (11) to open the support surface (10) so that its outer diameter conforms to the hole diameter of the double-ear bracket. The diameter of the removable outer guide rod (7) matches the inner diameter of the bushing (4); The sliding support mechanism consisting of the support surface (10) and the slide rod (11) is connected to the detachable outer guide rod (7) on one side by a ring buckle (9), and fixed on the threaded sleeve of the variable diameter inner guide rod (6) on the other side. The support surface (10) can be unfolded and retracted by turning the detachable outer guide rod (7).

3. A method for coaxial enlargement of a double-ear type support, characterized in that, The applicable multi-specification machine-mounted non-disassembly coaxial reaming tool as described in claim 1 or 2 is used; Includes the following steps: Step 1: Select the appropriate bushing (4) and detachable outer guide rod (7) according to the diameter of the hole after the double ear bracket is enlarged. Install the two bushings (4) on the slots on both sides of the guide (1) and rotate the detachable outer guide rod (7) onto the variable diameter guide pin (5). Step 2: Insert the guide (1) into the double-ear bracket that needs to be enlarged. At this time, the two ears of the guide (1) are placed crosswise with the two ears of the double-ear bracket. Step 3: Insert the variable diameter guide pin (5) into the guide (1) and the double ear bracket hole along the bushing (4). Rotate the removable outer guide rod (7) to open the support surface (10) of the variable diameter inner guide rod (6) and fit it tightly with the double ear bracket hole. At this time, the outer diameter of the variable diameter inner guide rod (6) is consistent with the inner diameter of the double ear bracket hole. The removable outer guide rod (7) is consistent with the inner diameter of the bushing (4). The bushing (4) is coaxial with the double ear bracket hole. Step 4: Use pressure rod (2) and pressure rod (3) to ensure that the ear of guide (1) fits tightly with the ear of double ear bracket, and tighten the stop nut to fix the two together; Step 5: Rotate the detachable outer guide rod (7) in the opposite direction to remove the variable diameter guide pin (5); Step 6: Use a reamer or other reaming tools to enlarge the hole in the double-ear bracket through the bushing (4).

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