Stop pin protruding amount determination device

Abstract

The utility model provides a stop pin protruding amount determination device, which comprises a determination assembly and a verification assembly, and the verification assembly is used for verifying the accuracy of the determination assembly. The judging assembly comprises a shell, a contact block, a stroke adjusting assembly, a stroke switch, an indicator lamp and a battery module. And the top surfaces of the shell and the contact block are arc surfaces and can be attached to the concave surface of the arc structure at the mounting position of the stop pin. The contact block can slide towards the interior of the shell along the axial direction under the abutting action of the stop pin, and the sliding amount is the protruding amount of the stop pin. The sliding amount is transmitted to the travel switch through the travel adjusting assembly, when the sliding amount meets the set requirement, a circuit in the travel switch is triggered to be switched on, the indicator lamp is powered through the power module, the indicator lamp is lightened, and it is indicated that the protruding amount of the stop pin meets the requirement. According to the utility model, the determination process is simple, rapid measurement and determination of the protruding amount of the stop pin in the narrow space of the aircraft flap screw rod support are realized, and the result is visual and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft airframe structural component assembly technology, specifically relating to a device for determining the amount of protrusion of a stop pin. Background Technology

[0002] The front end of the aircraft flap screw support 14 is an arc-shaped structure 15. A stop pin 16 is radially mounted on the concave surface of the arc-shaped structure, and the stop pin extends out of the concave surface of the arc-shaped structure, which can position the bushing on the outside of the flap screw pin shaft. See [link to stop pin installation position] for details. Figure 1 and Figure 2 During the aircraft structural assembly process and before the flap screw pin is installed, it is necessary to measure the protrusion of the stop pin on the arc-shaped structure of the support. The protrusion of the stop pin is required to be no less than 1.5mm to ensure that the inner bushing of the support does not move with the pin during the flap retraction and extension process, thus avoiding support wear.

[0003] The common method for determining the protrusion of the stop pin is to use a vernier caliper to measure the amount of protrusion. This method has the following disadvantages: (1) During the measurement process, the operator needs to hold the vernier caliper perpendicular to the arc-shaped end face in a narrow space. However, due to the small space in front of the flap screw support, this operation is extremely difficult. (2) When measuring, the depth gauge end of the vernier caliper needs to touch the bottom of the stop pin. The depth gauge end is straight and cannot match the arc surface of the arc support. The accuracy of the measurement depends entirely on the operator's skill level, and the measurement result has a large error. (3) When measuring with a vernier caliper, the vernier caliper needs to be locked on-site before reading, recording and processing the data, and then judging the conformity of the protrusion. The operation process is cumbersome and the judgment efficiency is low. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing methods for determining the protrusion amount of stop pins on arc supports, which are difficult to operate and have poor accuracy. Instead, it provides a device for determining the protrusion amount of stop pins. This device converts the protrusion amount of the stop pin into the sliding amount of the contact block and transmits it to the limit switch. The limit switch is set to conduction stroke. When the protrusion amount of the stop pin meets the design requirements, the limit switch turns on the power supply and the indicator light, which illuminates the indicator light. The operation is simple and the test results are intuitive.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A device for determining the protrusion amount of a stop pin, wherein the stop pin is radially mounted on an arc-shaped structure and extends out of the concave surface of the arc-shaped structure, and the extension amount is not less than a set stop pin protrusion amount threshold; the device includes a verification component and a determination component.

[0007] The determination component is used to measure and determine whether the protrusion of the stop pin meets the set requirements; the determination component includes a housing, a contact block, a stroke adjustment component, a limit switch, an indicator light, and a battery module;

[0008] The contact block, stroke adjustment component, limit switch, and battery module are installed inside the housing; the stroke adjustment component is used to adjust the working stroke of the limit switch.

[0009] The top of the contact block and the top of the outer shell are arc surfaces that match the concave surface of the arc structure, and the top of the contact block can be flush with the top of the outer shell; the contact block can slide along its axial direction when the measured stop pin is abutted.

[0010] The bottom of the contact block is coaxially connected to one end of the travel adjustment component; the other end of the travel adjustment component can abut against the contact end of the travel switch.

[0011] The output terminal of the limit switch is connected to the indicator light via the battery module;

[0012] The limit switch can be turned on when its working stroke is not less than the set stop pin protrusion threshold, so as to illuminate the indicator light, and can be turned off when its working stroke is less than the set stop pin protrusion threshold, so as to extinguish the indicator light.

[0013] The verification component is used to verify the accuracy of the determination component before performing the measurement and determination operation.

[0014] Furthermore, the outer casing is sequentially fixedly connected to a front end cover, an outer casing body, and a rear end cover; the front end cover is disposed at one top end of the outer casing body, and the rear end cover is coaxially disposed at the bottom of the outer casing body;

[0015] The contact block and the stroke adjustment assembly are installed inside the front end cover;

[0016] The limit switch is fixedly installed inside the housing body;

[0017] The battery module is installed inside the rear cover, and an indicator light mounting hole is provided at the end of the rear cover.

[0018] Furthermore, the contact block is a second-order columnar shape, and the front end cover has a stepped hole along the axis that mates with the outer wall of the contact block;

[0019] The contact block can slide axially along the stepped hole of the front end cover when the measured stop pin abuts against the top surface of the contact block;

[0020] The small end face of the contact block is an arc surface that matches the concave surface of the arc structure;

[0021] The contact block has a threaded blind hole along the axis starting from the large end face.

[0022] Furthermore, the stroke adjustment assembly includes a locking nut and a screw;

[0023] One end of the screw engages with the threaded blind hole of the contact block, and the other end can abut against the contact end of the limit switch, so as to transmit the sliding distance of the contact block under the action of the measured stop pin to the limit switch;

[0024] The locking nut is coaxially mounted on the rod body of the screw, and the end face of the locking nut contacts the large end face of the contact block; by adjusting the mating depth between the screw and the contact block, the working stroke of the limit switch can be adjusted.

[0025] Furthermore, the battery module includes a battery holder and a button battery installed in the battery holder.

[0026] Furthermore, the calibration component includes an arc-shaped support body, and a first standard measuring block, a second standard measuring block, and a third standard measuring block that are radially mounted on the arc-shaped support body and extend out of the concave surface of the arc-shaped support body;

[0027] The concave surface of the arc-shaped support can fit against the arc surface of the top of the contact block in the determination component;

[0028] The protrusion of the first standard measuring block is less than the set threshold for the protrusion of the stop pin.

[0029] The protrusion of the second standard measuring block is equal to the set threshold for the protrusion of the stop pin;

[0030] The protrusion of the third standard measuring block is greater than the set threshold for the protrusion of the stop pin.

[0031] Furthermore, the difference in protrusion between adjacent standard measuring blocks is no greater than 0.05 mm.

[0032] Furthermore, the top of the outer casing and at the mounting position of the contact block have a rectangular slot that matches the bottom of the contact block;

[0033] The outer shell and the rear cover have two arc-shaped limiting protrusions arranged along the axial direction of the contact block at corresponding positions on the same side. The two limiting protrusions form a limiting space to accommodate the operator's thumb, so as to prevent the judgment component from falling off due to insufficient force applied by the operator's fingers in the narrow space.

[0034] Furthermore, the contact block and the front end cover are machined from 45 steel.

[0035] Furthermore, the locking nut, screw, battery holder, rear end cover, and outer casing are all manufactured using 3D printing.

[0036] The advantages of this utility model are:

[0037] 1. This utility model's stop pin protrusion determination device includes a housing, a contact block, a stroke adjustment component, a limit switch, and an indicator light. The contact block, stroke adjustment component, and limit switch are installed inside the housing. The top of the contact block and the housing are arc surfaces, designed according to the concave surface dimensions of the arc-shaped structure of the aircraft flap screw support. By having the stop pin under test abut against the top of the contact block until the top surface of the housing is completely in contact with the concave surface of the arc-shaped structure of the support, the protrusion amount of the stop pin is transmitted to the limit switch through the sliding amount of the contact block and the stroke adjustment component. The limit switch compares the sliding amount with a set protrusion threshold. When the protrusion amount of the stop pin meets the requirements, the power supply and the indicator light are turned on, and the indicator light illuminates. When the requirements are not met, the indicator light is off. The judgment process is simple, and the illumination and extinguishing of the indicator light more intuitively show whether the protrusion amount of the stop pin is qualified or not, making it easy for operators to quickly obtain the judgment result in the confined space of the aircraft, resulting in high judgment efficiency.

[0038] 2. To avoid human error caused by stroke error of the judgment component after prolonged use, this utility model designs a calibration component. The calibration component includes an arc-shaped support and three standard measuring blocks radially arranged on the arc-shaped support. The protrusion of the three standard measuring blocks is less than a set threshold, equal to a set threshold, and greater than a set threshold, respectively, and the protrusion of the three standard measuring blocks has passed metrological testing. Before using the judgment device for measurement and judgment, the protrusion of the three standard measuring blocks on the calibration component is first judged. If the judgment result is the same as the metrological standard result, it indicates that the accuracy of the judgment device meets the requirements and can be used normally. The calibration process using the calibration component is simple, ensuring the accuracy of the actual judgment result.

[0039] 3. The process of measuring and judging the protrusion of the stop pin using the verification and judgment components in this utility model is simple, efficient, and saves labor costs. Actual calculations show that using this utility model device improves the efficiency of judging the protrusion of the stop pin by 8 to 10 times, while also achieving high accuracy.

[0040] 4. The judgment component in this utility model is small and its overall size is much smaller than the arc structure size of the aircraft flap screw support. In the narrow space of the aircraft flap screw support, the operator can hold the judgment component and insert it into the front end of the support to detect and judge the amount of protrusion of the stop pin. The operation is simple and convenient.

[0041] 5. Due to the limited space on the aircraft flap screw support and the presence of numerous other accessories, it is extremely inconvenient to retrieve the judgment component if it is accidentally dropped during operation. To avoid this problem, this invention features two arc-shaped limiting protrusions along the axial direction of the contact block on the same side of the outer shell and the rear end cover. These two protrusions form a limiting space for the operator's right thumb, preventing the judgment component from slipping due to insufficient hand strength caused by the limited space when the operator is holding it. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the aircraft flap screw support in the background art;

[0043] Figure 2 yes Figure 1 A magnified view showing the installation position of the stop pin on the support;

[0044] Figure 3 This is a perspective view of the judging component in the stop pin protrusion judging device of this utility model;

[0045] Figure 4 This is a cross-sectional view of the judging component in the stop pin protrusion judging device of this utility model.

[0046] Figure 5 This is a schematic diagram of the structure of the verification component in the stop pin protrusion determination device of this utility model;

[0047] Figure 6 This is a schematic diagram illustrating the use of a verification component to calibrate the accuracy of a judgment component.

[0048] Figure 7 This is a schematic diagram illustrating the use of a judgment component to measure and determine the amount of protrusion of the stop pin on the support.

[0049] Figure 8 yes Figure 7 A magnified view of a portion of the image.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1-Outer casing, 101-Front end cover, 102-Outer casing body, 103-Rear end cover, 2-Contact block, 3-Locking nut, 4-Screw, 5-Limit switch, 6-Battery holder, 7-Button battery, 8-LED indicator light, 9-Screw, 10-Arc-shaped support, 11-First standard measuring block, 12-Second standard measuring block, 13-Third standard measuring block, 14-Aircraft flap screw support, 15-Arc-shaped structure, 16-Stop pin. Detailed Implementation

[0052] The embodiments of the present invention are described in detail below. These embodiments are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0053] To address the problem of limited space in aircraft flap screw supports, making it inconvenient to measure the protrusion of the stop pin on the curved structure of the support, this embodiment provides a stop pin protrusion determination device, including a determination component and a calibration component. The determination component is used to measure and determine the protrusion of the stop pin under test. The calibration component calibrates the determination component before using it for measurement and determination operations to ensure the accuracy of the determination component's detection.

[0054] Reference Figure 3 and Figure 4 The determining components include a housing 1, a contact block 2, a locking nut 3, a screw 4, a limit switch 5, a battery module, and an LED indicator 8. The overall size of the housing is smaller than the space size at the front end of the support.

[0055] The outer casing 1 includes a front cover 101, a casing body 102, and a rear cover 103, which are sequentially fixed together. The front cover 102 is a rectangular block and is vertically fixed to a rectangular slot at one end of the top of the casing body 103 with bolts. The rectangular slot matches the base of the front cover. The top of the front cover is an arc surface, designed according to the arc structure of the support, so that it can fit into the concave surface of the arc structure of the support. A second-order through hole is opened along its axis inside the front cover for installing the contact block 2, the locking nut 3, and the screw 4. Arc-shaped notches are opened axially at the four corners of the front cover, extending from the top of the front cover to the base of the front cover, so as to facilitate fixing the front cover to the top of the casing body with bolts.

[0056] The outer casing 102 is rectangular in shape, with a rectangular cavity and a stepped hole communicating with the rectangular cavity. The rectangular cavity is used to install the limit switch 5. The side wall of the outer casing has a mounting through hole for fixing the limit switch 5 to the outer casing with screws 9. The stepped hole is for the contact end of the limit switch to pass through.

[0057] The rear end cover 103 is fixed to the bottom of the housing body, and has a cavity inside to accommodate the battery module. The battery module includes a battery holder 6 and a button battery 7, with the button battery 7 mounted on the battery holder. An axial through-hole is formed at the end of the rear end cover for mounting an LED indicator 8. The button battery 7 powers the LED indicator 8 when the limit switch is triggered.

[0058] Because the space on the aircraft flap screw support 14 is small and there are many other accessories, it is very inconvenient to pick up the judgment component if it is accidentally dropped during operation. In order to avoid the above problems, in this embodiment, two arc-shaped limiting protrusions are provided at the corresponding positions on the same side of the outer shell body 102 and the rear cover 103, which are arranged along the axial direction of the contact block. The two limiting protrusions form a limiting space to accommodate the operator's thumb, thus avoiding the risk of the judgment component slipping due to the small space and insufficient force of the thumb when the operator holds the judgment component.

[0059] Contact block 2 is a second-order columnar shape, with its small end face being an arc surface that can mate with the concave surface of the support's arc structure. Contact block 2 is installed in the stepped hole of the front cover 1, and after installation, the top of the contact block is flush with the top of the front cover, forming a complete arc surface. Contact block 2 can slide axially along the stepped hole of the front cover when the measured stop pin is pushed against it. A threaded blind hole is opened along the axis from the large end face of the contact block for fixing and installing the screw 4.

[0060] One end of the screw 4 engages with the threaded blind hole of the contact block, while the other end abuts against the contact end of the limit switch, transmitting the sliding distance of the contact block 2 under the action of the stop pin to the limit switch 5. The locking nut 3 is coaxially mounted on the shaft of the screw 4, with its end face fitting against the large end face of the contact block 2. The working stroke of the limit switch can be adjusted by changing the engagement depth between the threaded blind hole on the screw and the contact block according to the actual required amount of stop pin protrusion, thus meeting different stop pin protrusion detection requirements.

[0061] The contact end of limit switch 5 contacts screw 4, and the output end of limit switch 5 is connected to LED indicator 8 via button battery 7. When the arc surface of the front cover is fully in contact with the concave surface of the arc structure of the support, the stop pin being tested will press down and slide the contact block 2. The sliding amount (i.e., the protrusion of the stop pin) is transmitted to limit switch 5 through screw 4. Taking the protrusion of the stop pin being tested as not exceeding 1.5mm as an example, limit switch 5 is pre-adjusted so that the internal circuit of the limit switch can be triggered when the travel is not less than 1.5mm, thereby connecting the button battery and LED indicator 8, and LED indicator 8 lights up.

[0062] Specifically, the locking nut 3, screw 4, battery holder 6, outer casing 102, and rear cover 103 are made using non-metallic 3D printing. The contact block 2 and front cover 101 are machined from 45 steel. The limit switch 5, LED indicator 8, and button battery 12 are finished products.

[0063] Reference Figure 5The calibration component includes an arc-shaped support 10, and three standard measuring blocks: a first standard measuring block 11, a second standard measuring block 12, and a third standard measuring block 13, which are radially mounted on the arc-shaped support and extend beyond its concave surface. The arc of the arc-shaped support 10 is designed according to the arc structure of the aircraft flap screw support, and can fit against the top arc surface of the contact block in the calibration component. In this embodiment, the first standard measuring block 11, the second standard measuring block 12, and the third standard measuring block 13 are arranged sequentially, with protrusions of 1.45 mm, 1.5 mm, and 1.55 mm, respectively, and the protrusions have passed metrological testing. To ensure calibration accuracy, the difference in protrusion between adjacent standard measuring blocks is no greater than 0.05 mm.

[0064] Reference Figure 6 Before each measurement and judgment using the judgment component, the calibration component must be calibrated to verify its qualification. The specific process is as follows: Hold the judgment component and tightly fit the top arc surface of the front cover with the concave surface of the arc-shaped support body where the qualified standard measuring block is located. Measure the three protrusions of 1.45mm, 1.50mm, and 1.55mm respectively. If the LED indicator does not light up when measuring the 1.45mm measuring block, but lights up when measuring the 1.50mm and 1.55mm measuring blocks, the judgment component is considered to be qualified. Otherwise, adjust the locking nut 3 and screw 4 inside the judgment component to adjust the conduction stroke of the limit switch 5. After adjustment, recalibrate until the qualified state is achieved.

[0065] After passing the verification, the protrusion of the stop pin under test is measured and judged using the judgment component. Figure 7 and Figure 8 As shown. Align the contact block 2 of the judgment component with the stop pin under test, and press the judgment component until the arc surface of the front cover 101 is tightly fitted with the concave surface of the arc-shaped structure 15 at the front end of the aircraft flap screw support 14; observe whether the LED indicator 8 is lit. If it is lit, the protrusion of the stop pin 16 is considered to be qualified and meets the design requirements; otherwise, it is considered unqualified. The operation process is simple, and the judgment result is intuitive and reliable.

[0066] The conduction stroke of the limit switch 5 and the protrusion of the standard measuring block can be adjusted according to different protrusion detection requirements to meet the different stop pin protrusion detection and judgment requirements.

[0067] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A device for determining the protrusion amount of a stop pin, wherein the stop pin is radially mounted on an arc-shaped structure, and the stop pin extends beyond the concave surface of the arc-shaped structure, and the extension amount is not less than a set stop pin protrusion amount threshold; characterized in that, The determination device includes a verification component and a determination component; The determination component is used to measure and determine whether the protrusion of the stop pin meets the set requirements; the determination component includes a housing, a contact block, a stroke adjustment component, a limit switch, an indicator light, and a battery module; The contact block, stroke adjustment component, limit switch, and battery module are installed inside the housing; the stroke adjustment component is used to adjust the working stroke of the limit switch. The top of the contact block and the top of the outer shell are arc surfaces that match the concave surface of the arc structure, and the top of the contact block can be flush with the top of the outer shell; the contact block can slide along its axial direction when the measured stop pin is abutted. The bottom of the contact block is coaxially connected to one end of the travel adjustment component; the other end of the travel adjustment component can abut against the contact end of the travel switch. The output terminal of the limit switch is connected to the indicator light via the battery module; The limit switch can be turned on when its working stroke is not less than the set stop pin protrusion threshold, so as to illuminate the indicator light, and can be turned off when its working stroke is less than the set stop pin protrusion threshold, so as to extinguish the indicator light. The verification component is used to verify the accuracy of the determination component before performing the measurement and determination operation.

2. The device for determining the amount of protrusion of the stop pin according to claim 1, characterized in that, The outer shell consists of a front cover, an outer shell body, and a rear cover that are sequentially fixed together; the front cover is located at one top end of the outer shell body, and the rear cover is coaxially located at the bottom of the outer shell body. The contact block and the stroke adjustment assembly are installed inside the front end cover; The limit switch is fixedly installed inside the housing body; The battery module is installed inside the rear cover, and an indicator light mounting hole is provided at the end of the rear cover.

3. The device for determining the amount of protrusion of the stop pin according to claim 2, characterized in that, The contact block is a second-order columnar shape, and the front end cover has a stepped hole along the axis that mates with the outer wall of the contact block. The contact block can slide axially along the stepped hole of the front end cover when the measured stop pin abuts against the top surface of the contact block; The small end face of the contact block is an arc surface that matches the concave surface of the arc structure; The contact block has a threaded blind hole along the axis starting from the large end face.

4. The device for determining the amount of protrusion of the stop pin according to claim 3, characterized in that, The stroke adjustment assembly includes a locking nut and a screw; One end of the screw engages with the threaded blind hole of the contact block, and the other end can abut against the contact end of the limit switch, so as to transmit the sliding distance of the contact block under the action of the measured stop pin to the limit switch; The locking nut is coaxially mounted on the rod body of the screw, and the end face of the locking nut contacts the large end face of the contact block; by adjusting the mating depth between the screw and the contact block, the working stroke of the limit switch can be adjusted.

5. The device for determining the amount of protrusion of the stop pin according to claim 4, characterized in that, The battery module includes a battery holder and a button battery installed in the battery holder.

6. The device for determining the amount of protrusion of the stop pin according to any one of claims 1-5, characterized in that, The calibration component includes an arc-shaped support body, and a first standard measuring block, a second standard measuring block, and a third standard measuring block that are radially mounted on the arc-shaped support body and extend out of the concave surface of the arc-shaped support body. The concave surface of the arc-shaped support can fit against the arc surface of the top of the contact block in the determination component; The protrusion of the first standard measuring block is less than the set threshold for the protrusion of the stop pin. The protrusion of the second standard measuring block is equal to the set threshold for the protrusion of the stop pin; The protrusion of the third standard measuring block is greater than the set threshold for the protrusion of the stop pin.

7. The device for determining the amount of protrusion of the stop pin according to claim 6, characterized in that, The difference in protrusion between adjacent standard measuring blocks shall not exceed 0.05 mm.

8. The device for determining the amount of protrusion of the stop pin according to claim 2, characterized in that, The top of the outer casing and at the mounting position of the contact block have a rectangular slot that matches the bottom of the contact block; The outer shell body and the rear end cover have two arc-shaped limiting protrusions arranged along the axial direction of the contact block at corresponding positions on the same side, and a limiting space for accommodating the operator's thumb is formed between the two limiting protrusions.

9. The device for determining the amount of protrusion of the stop pin according to claim 2, characterized in that, The contact block and the front end cover are machined from 45 steel.

10. The device for determining the amount of protrusion of the stop pin according to claim 5, characterized in that, The locking nut, screw, battery holder, rear end cover, and outer shell are all manufactured using 3D printing.

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