A front lift cabin shape-maintaining fixture with positioning and measuring functions and a positioning method thereof

Abstract

The present invention discloses a front landing gear compartment shape-keeping fixture with positioning and measuring functions and a positioning method thereof. The fixture comprises a frame (1), an upper key intersection locator (3), a lower key intersection locator (5) and a middle key intersection locator (4) are provided at the upper end of the frame (1), and a positioning support (2) is provided at the lower end of the frame (1). The positioning method comprises the following steps: a. completing the installation of the left and right side panels and the upper lock of the front landing gear compartment through the key intersection locator; b. completing the assembly of the front landing gear compartment with the positioning support (2) as a reference; c. completing the positioning of the front landing gear compartment on the lower assembly jig of the nose with the positioning support (2) as a positioning reference; d. completing the positioning of the lower assembly of the nose on the upper and lower assembly jigs of the nose with the positioning support (2) as a positioning reference; e. measuring the deformation of the key intersection; f. removing the fixture to perform the subsequent installation of the front landing gear. The measurement accuracy of the key intersection is improved by combining the fixture with the positioning support.

Description

Technical Field

[0001] The invention discloses a front lift cabin shape-maintaining fixture with positioning and measuring functions and a positioning method thereof, belonging to the technical field of installation and positioning. Background Art

[0002] The front landing gear bay structure is one of the components of the nose, located on the lower side of the cockpit floor frame of the nose. This structure includes the intersection of the front landing gear installation and control-related mechanisms. Together with the surrounding wall panel components, cockpit floor components and other structures, it is assembled into the lower nose assembly and is part of the nose. This structure is mainly used to install the front landing gear and control-related mechanisms.

[0003] Since the four wall panels of the nose landing gear bay structure have large openings and the requirements for the nose landing gear installation intersections and control mechanisms are high, it is generally necessary to maintain the shape of the wall panel structure and key intersection positions. The existing shape-keeping fixture only maintains the shape of the structure and key intersections. After the nose landing gear bay is assembled and the shape-keeping fixture is installed, the component needs to select a new reference when positioning it in the lower-level assembly to complete the connection with the surrounding wall panel components, cockpit floor components and other structures.

[0004] However, the prior art has the following disadvantages:

[0005] 1. The positioning and docking of the nose landing gear bay intersection point are not uniform, which affects the position and coaxiality of the key intersection point of the nose landing gear bay after docking.

[0006] 2. After the front landing gear bay is installed, it is difficult to measure the intersection point. There are multiple reference conversions and transfers, resulting in large measurement errors. Summary of the Invention

[0007] The technical problem to be solved by the present invention is that the existing front landing gear bay intersection assembly positioning and docking have inconsistent positioning datums and large installation errors.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a front-lift cabin shape-maintaining fixture with positioning and measuring functions, including a frame in the shape of a right triangle, upper key intersection locators are arranged at intervals on the upper ends of the vertical sides of the frame, two lower key intersection locators are arranged at intervals on the ends of the horizontal sides, and two middle key intersection locators are arranged at intervals between the two upper key intersection locators, and a positioning support is arranged at the intersection of the lower end of the frame.

[0009] Among them, the upper key intersection locator in the above structure includes an upper support, an upper fixed tube and an upper screw. The upper support is an L-shaped structure, and the horizontal edge is arranged at the upper end of the vertical side of the frame along the length direction of the frame. The upper fixed tube passes vertically through the vertical side of the upper support and is fixed thereto, and the upper screw is inserted into the upper fixed tube and threadedly connected thereto.

[0010] Furthermore, the above structure also includes an upper fixing seat, which is a U-shaped block structure and is connected to the frame. The lower end of the upper support is placed in the U-shaped opening and is slidably connected thereto.

[0011] Furthermore, the above structure also includes a locking screw and an upper positioning pin. The upper positioning pin can make the upper support 32 slide in the opening of the upper fixing seat, and the locking screw can connect and fix the upper support and the upper fixing seat.

[0012] Among them, the key intersection locator described in the above structure includes a positioning screw, a positioning nut and a plug. A fixed block is arranged between the two upper key intersection locators, and a through hole is provided on the fixed block. The positioning screw is passed through the fixed block, and the protruding end is threadedly connected to the positioning nut. The plug is arranged on both sides of the fixed block and is sleeved on the positioning screw.

[0013] Among them, the lower key intersection locator in the above structure includes a lower support, a lower fixed tube, a lower screw and a lower positioning pin. The lower support is arranged at the horizontal end of the frame, and a through hole is provided on the lower support. The lower fixed tube is passed through the lower support along the length direction of the frame and is fixedly connected by the lower positioning pin. The lower screw is passed through the lower fixed tube and is threadedly connected to it.

[0014] Furthermore, the lower positioning pin in the above structure is a bent screw structure, a plurality of through holes are arranged at intervals on the lower fixing tube, a through hole is arranged on the lower support, and a fixing nut is arranged after one end of the lower positioning pin passes through the lower support and the lower fixing tube.

[0015] Wherein, the frame in the above structure is formed by welding square steel, and reinforcing ribs are provided at the corners.

[0016] A method for positioning a front lift hatch conforming fixture with positioning and measuring functions, comprising any of the fixtures described above, and comprising the following steps:

[0017] a. When assembling the nose landing gear bay, the upper key intersection locator, middle key intersection locator and lower key intersection locator complete the installation of the left and right side panels and upper locks of the nose landing gear bay;

[0018] b. Using the positioning support as a reference, the nose landing gear bay is positioned on the assembly jig by cooperating the pins and holes to complete the nose landing gear bay assembly;

[0019] c. Using the positioning support as the positioning reference, the front landing gear bay is positioned on the lower nose assembly jig by cooperating with the pin and hole;

[0020] d. Using the positioning support as the positioning reference, the lower assembly of the machine head is positioned on the upper and lower assembly jigs of the machine head by cooperating with the holes for the mounting pins and the fork ears;

[0021] e. Measure the deformation of the key intersection of the nose landing gear bay using the positioning support as the measurement reference;

[0022] f. Remove the fixture and proceed with the installation of the nose landing gear.

[0023] The beneficial effect of the present invention is that the structure can reduce a set of positioning references on the product and improve the installation accuracy of key intersections; at the same time, it can provide a set of measurement references to reflect the deformation of key intersections, avoiding product rework. By connecting the 5 intersection locators on the frame with the key intersections of the front landing gear bay, a complete rigid body is formed, which is beneficial to the force balance of the front landing gear bay structure during subsequent assembly and nose transportation and transfer, and maximizes the stability of the overall structure and key intersections, and ensures the position and coaxiality requirements of the front landing gear installation intersection; the 4 positioning supports of the fixture are the key positioning references for the front landing gear bay in subsequent assembly, including front landing gear bay assembly, nose lower assembly, and nose upper and lower assembly, which can reduce the accumulation of assembly errors and improve the installation accuracy of key intersections; at the same time, the positioning supports can be used as a measurement of the installation intersection position deviation when measuring the nose, and the installation accuracy is monitored at the nose component stage to avoid product rework. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at point I in the middle.

[0026] Figure 3 For the present invention Figure 1 Schematic diagram of the enlarged structure at II in the middle.

[0027] Figure 4 For the present invention Figure 1 Enlarged schematic diagram of the structure at point III.

[0028] Figure 5 This is a schematic diagram of the front landing gear bay assembly structure of the present invention.

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the cross-section structure.

[0030] Figure 7 This is a schematic diagram of the assembly tooling structure of the front landing gear bay of the present invention.

[0031] Figure 8 This is a schematic diagram of the assembly and positioning of the front landing gear compartment shape-conserving fixture of the present invention at the lower part of the nose.

[0032] Figure 9 This is a schematic diagram of the assembly and positioning of the front landing gear compartment shape-retaining fixture of the present invention on the upper and lower parts of the nose.

[0033] Marked in the figure: 1 is the frame, 2 is the positioning support, 3 is the upper key intersection locator, 31 is the upper fixing seat, 32 is the upper support, 33 is the upper screw, 34 is the upper fixing tube, 35 is the locking screw, 36 is the upper positioning pin, 4 is the middle key intersection locator, 41 is the positioning screw, 42 is the plug, 43 is the positioning nut, 5 is the lower key intersection locator, 51 is the support column, 52 is the lower support, 53 is the lower fixing tube, 54 is the lower screw, 55 is the lower positioning pin, 56 is the fixing nut, 6 is the fixing block, and 7 is the reinforcing rib plate. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] like Figures 1 to 5 As shown, a front landing gear compartment shape-keeping fixture with positioning and measuring functions of the present invention includes a right-angled triangle-shaped frame 1, an upper key intersection locator 3 is set at intervals on the upper ends of the vertical sides of the frame 1, two lower key intersection locators 5 are set at intervals on the ends of the horizontal sides, and two middle key intersection locators 4 are set at intervals between the two upper key intersection locators 3, and a positioning support 2 is set at the intersection of the lower end of the frame 1. It can be understood by those skilled in the art that this structure actually forms a complete rigid body by connecting the intersection locators (that is, the upper key intersection locator 3, the middle key intersection locator 4 and the lower key intersection locator 5) with the key intersection of the front landing gear compartment, which is beneficial to the force balance of the front landing gear compartment structure during subsequent assembly and nose transportation and transfer, maximizes the stability of the overall structure and key intersections, and ensures the position and coaxiality requirements of the front landing gear installation intersection. Therefore, the frame 1 should have a certain strength, preferably a right-angled triangle-shaped frame 1, and the connection is connected and fixed by a reinforcing rib 7 to increase the strength of the entire structure. The upper key intersection locator 3, the middle key intersection locator 4 and the lower key intersection locator 5 are mainly used for connection with the left and right side wall panels and the upper lock of the front landing gear compartment. The positioning support 2 is mainly used for connection and positioning with the jig. The positioning support 2 is an arc connecting block with a through hole.

[0036] Preferably, the upper key intersection locator 3 in the above structure includes an upper support 32, an upper fixing tube 34 and an upper screw 33. The upper support 32 is an L-shaped structure, and the horizontal edge is arranged at the upper end of the vertical edge of the frame 1 along the length direction of the frame 1. The upper fixing tube 34 vertically passes through the vertical edge of the upper support 32 and is fixed thereto, and the upper screw 33 penetrates into the upper fixing tube 34 and is threadedly connected thereto. Those skilled in the art can understand that the specific structure of the key intersection locator 3 of this structure is preferably included in an upper support 32, an upper fixing tube 34 and an upper screw 33. The upper support 32 is preferably an L-shaped structure, and the horizontal edge is arranged at the upper end of the vertical edge of the frame 1 along the length direction of the frame 1. There are two upper supports 32 and they are respectively arranged at the two ends and are arranged opposite each other. The upper fixing tube 34 passes vertically through the vertical edge of the upper support 32 and is fixed thereto. The upper screw 33 is inserted into the upper fixing tube 34 and is threadedly connected thereto. In fact, the left and right side walls of the front landing gear compartment can be inserted into the upper fixing tube 34 and the upper screw 33 is screwed in to achieve fixation. The cross-sectional size of the upper screw 33 should be larger than the through-hole size on the left and right side walls of the front landing gear compartment to be fixed.

[0037] Preferably, the above structure further includes an upper fixing seat 31, which is a U-shaped block structure and is connected to the frame body 1, and the lower end of the upper support 32 is placed in the U-shaped opening and is slidably connected thereto. It will be understood by those skilled in the art that in order to facilitate position adjustment, the present device is preferably provided with an upper fixing seat 31, and the upper fixing seat 31 is a U-shaped block structure and is connected to the frame body 1, and the lower end of the upper support 32 is placed in the U-shaped opening and is slidably connected thereto.

[0038] Preferably, the above structure further includes a locking screw 35 and an upper positioning pin 36. The upper positioning pin 36 can enable the upper support 32 to slide within the opening of the upper fixing seat 31, and the locking screw 35 can connect and fix the upper support 32 and the upper fixing seat 31. It will be understood by those skilled in the art that in order to achieve the guidance and positioning of the upper support 32, it is preferred to provide the locking screw 35 and the upper positioning pin 36. Specifically, the upper positioning pin 36 can enable the upper support 32 to slide within the opening of the upper fixing seat 31, and the locking screw 35 can connect and fix the upper support 32 and the upper fixing seat 31.

[0039] Preferably, the key intersection locator 4 in the above structure includes a positioning screw 41, a positioning nut 43 and a plug 42. A fixed block 6 is arranged between the two upper key intersection locators 3. A through hole is provided on the fixed block 6. The positioning screw 41 is passed through the fixed block 6, and the protruding end is threadedly connected to the positioning nut 43. The plug 42 is arranged on both sides of the fixed block 6 and is sleeved on the positioning screw 41. Those skilled in the art will appreciate that the present structure preferably comprises a central key intersection locator 4 including a positioning screw 41, a positioning nut 43 and a plug 42, and the central key intersection locator 4 is mainly used for the installation and fixation of the upper lock of the front landing gear compartment. Therefore, a fixing block 6 is preferably provided between the two upper key intersection locators 3, that is, a fixing block 6 is provided on the mounting rod between the two upper key intersection locators 3, and a through hole is provided on the fixing block 6, the positioning screw 41 is passed through the fixing block 6, and the protruding end is threadedly connected to the positioning nut 43, the plug 42 is provided on both sides of the fixing block 6, and is sleeved on the positioning screw 41, and actually the bottom of the front landing gear compartment is sleeved on the positioning screw 41 to fix it.

[0040] Preferably, the lower key intersection locator 5 in the above structure includes a lower support 52, a lower fixing tube 53, a lower screw 54 and a lower positioning pin 55, wherein the lower support 52 is arranged at the end of the horizontal side of the frame 1, and a through hole is provided on the lower support 52, the lower fixing tube 53 is passed through the lower support 52 along the length direction of the frame 1, and is fixedly connected by the lower positioning pin 55, and the lower screw 54 is passed through the lower fixing tube 53 and is threadedly connected thereto. It can be understood by those skilled in the art that the present device preferably has a lower key intersection locator 5 structure, specifically including a lower support 52, a lower fixing tube 53, a lower screw 54 and a lower positioning pin 55, wherein the lower support 52 is arranged at the end of the horizontal side of the frame 1 and is symmetrically arranged, and a through hole is provided on the lower support 52, the lower fixing tube 53 is passed through the lower support 52 along the length direction of the frame 1, and is fixedly connected by the lower positioning pin 55, and the lower screw 54 is passed through the lower fixing tube 53 and is threadedly connected thereto. In practice, the left and right side walls of the front landing gear compartment are installed on the lower fixing tube 53, and their position can be adjusted by the lower positioning pin 55, and the lower screw 54 is screwed in to fix them to the frame 1. In practice, for easy installation, the lower support 52 is preferably connected to the horizontal end of the frame 1 through the support column 51.

[0041] Preferably, the lower positioning pin 55 in the above structure is a bent screw structure, a plurality of through holes are provided at intervals on the lower fixing tube 53, a through hole is provided on the lower support 52, and one end of the lower positioning pin 55 passes through the lower support 52 and the lower fixing tube 53 and is provided with a fixing nut 56. It will be understood by those skilled in the art that, in order to facilitate the adjustment of the lower fixing tube 53, the lower positioning pin 55 is preferably a bent screw structure, a plurality of through holes are provided at intervals on the lower fixing tube 53, a through hole is provided on the lower support 52, and one end of the lower positioning pin 55 passes through the lower support 52 and the lower fixing tube 53 and is provided with a fixing nut 56. In practice, the position of the lower positioning pin 55 extending out of the lower support 52 is adjusted by inserting it into different through holes of the lower fixing tube 53.

[0042] Preferably, the frame 1 in the above structure is formed by welding square steel, and reinforcing ribs 7 are provided at the corners. Those skilled in the art will appreciate that, in order to ensure the structural strength of the frame 1, the frame 1 is preferably formed by welding square steel, and reinforcing ribs 7 are provided at the corners. The actual square steel is made of Q235A steel.

[0043] A method for positioning a front lift hatch conforming fixture with positioning and measuring functions, comprising any of the fixtures described above, and comprising the following steps:

[0044] a. When assembling the nose landing gear bay, the upper key intersection locator 3, the middle key intersection locator 4, and the lower key intersection locator 5 complete the installation of the left and right side panels and the upper lock of the nose landing gear bay;

[0045] b. Using positioning support 2 as a reference, complete the positioning on the nose landing gear bay assembly jig by cooperating between the pin and the hole to complete the nose landing gear bay assembly;

[0046] c. Using positioning support 2 as the positioning reference, the front landing gear bay is positioned on the lower nose assembly jig by cooperating between the pin and the hole;

[0047] d. Using the positioning support 2 as the positioning reference, the lower assembly of the machine head is positioned on the upper and lower assembly jigs of the machine head by cooperating with the holes for the mounting pins and the fork ears;

[0048] e. Using positioning support 2 as the measurement reference, measure the deformation of the key intersection of the front landing gear compartment;

[0049] f. Remove the fixture to carry out the subsequent installation of the front landing gear. It can be understood by those skilled in the art that the five intersection locators on the frame 1 of this structure (i.e., the upper key intersection locator 3, the middle key intersection locator 4, and the lower key intersection locator 5) are connected to the key intersection of the front landing gear compartment to form a complete rigid body, which is beneficial to the force balance of the front landing gear compartment structure during the subsequent assembly and transportation and transfer of the nose, and maximizes the stability of the overall structure and key intersections, and ensures the position and coaxiality requirements of the front landing gear installation intersection; the four positioning supports 2 of the fixture are the key positioning references for the front landing gear compartment in the subsequent assembly, including the front landing gear compartment assembly, the lower nose assembly, and the upper and lower nose assembly, which can reduce the accumulation of assembly errors and improve the installation accuracy of key intersections; at the same time, the positioning supports 2 can be used as a measurement of the installation intersection position deviation when measuring the nose, and the installation accuracy is monitored at the nose component stage to avoid rework of the product.

Claims

1. A front lift cabin shape-keeping fixture with positioning and measurement functions, characterized by: The invention comprises a frame (1) in the shape of a right triangle, wherein an upper key intersection locator (3) is arranged at intervals on the upper end of the vertical side of the frame (1), two lower key intersection locators (5) are arranged at intervals on the end of the horizontal side, and two middle key intersection locators (4) are arranged at intervals between the two upper key intersection locators (3), and a positioning support (2) is arranged at the intersection of the lower end of the frame (1); the upper key intersection locator (3) comprises an upper support (32), an upper fixing tube (34) and an upper screw (33), the upper support (32) is an L-shaped structure, and the horizontal side is arranged at the upper end of the vertical side of the frame (1) along the length direction of the frame (1), the upper fixing tube (34) vertically passes through the vertical side of the upper support (32) and is fixed thereto, and the upper screw (33) penetrates into the upper fixing tube (34) and is threadedly connected thereto; the middle key intersection locator (4) comprises a positioning screw (41), a positioning screw (42), a positioning screw (43), a positioning screw (44), a positioning screw (45), a positioning screw (46), a positioning screw (47), a positioning screw (48), a positioning screw (49), a positioning screw (41), a positioning screw (41), a positioning screw (41), a positioning screw (42), a positioning screw (43), a positioning screw (44), a positioning screw (45), a positioning screw (46), a positioning screw (47), a positioning screw (48), a positioning screw (49), a positioning screw (41 ... The nut (43) and the plug (42) are provided between the two upper key intersection positioners (3). A fixed block (6) is provided between the two upper key intersection positioners (3). A through hole is provided on the fixed block (6). The positioning screw (41) is passed through the fixed block (6), and the protruding end is threadedly connected to the positioning nut (43). The plug (42) is provided on both sides of the fixed block (6) and is sleeved on the positioning screw (41); the lower key intersection positioner (5) includes a lower support (52), a lower fixed tube (53), a lower screw (54) and a lower positioning pin (55). The lower support (52) is provided at the end of the horizontal side of the frame (1), and a through hole is provided on the lower support (52). The lower fixed tube (53) is passed through the lower support (52) along the length direction of the frame (1) and is fixedly connected by the lower positioning pin (55). The lower screw (54) is passed through the lower fixed tube (53) and is threadedly connected thereto.

2. The front lift cabin shape-maintaining fixture with positioning and measuring functions according to claim 1, characterized in that: It also includes an upper fixing seat (31), which is a U-shaped block structure and is connected to the frame (1). The lower end of the upper support (32) is placed in the U-shaped opening and is slidably connected thereto.

3. The front lift cabin shape-maintaining fixture with positioning and measuring functions according to claim 2, characterized in that: It also includes a locking screw (35) and an upper positioning pin (36), wherein the upper positioning pin (36) can enable the upper support (32) to slide in the opening of the upper fixing seat (31), and the locking screw (35) can connect and fix the upper support (32) and the upper fixing seat (31).

4. The front lift cabin shape-keeping fixture with positioning and measuring functions according to claim 1, characterized in that: The lower positioning pin (55) is a bent screw structure. A plurality of through holes are provided at intervals on the lower fixing tube (53). A through hole is provided on the lower support (52). One end of the lower positioning pin (55) passes through the lower support (52) and the lower fixing tube (53) and is provided with a fixing nut (56).

5. The front lift cabin shape-maintaining fixture with positioning and measuring functions according to claim 1, characterized in that: The frame (1) is formed by welding square steel, and reinforcing ribs (7) are provided at the corners.

6. A method for positioning a front lift cabin shape-conserving fixture with positioning and measurement functions, characterized in that: The clamp comprising any one of claims 1 to 5, wherein the steps are as follows: a. When assembling the front landing gear bay, the upper key intersection locator (3), the middle key intersection locator (4) and the lower key intersection locator (5) complete the installation of the left and right side panels and the upper lock of the front landing gear bay; b. Using the positioning support (2) as a reference, the positioning is completed on the front landing gear bay assembly jig by cooperating with the pin and the hole, thereby completing the front landing gear bay assembly; c. Using the positioning support (2) as a positioning reference, the front landing gear compartment is positioned on the lower assembly jig of the nose by cooperating with the pin and the hole; d. Using the positioning support (2) as a positioning reference, the lower assembly of the machine head is positioned on the upper and lower assembly jigs of the machine head by cooperating with the holes for the mounting pins and the fork ears; e. Using the positioning support (2) as a measurement reference, measure the deformation of the key intersection of the front landing gear compartment; f. Remove the fixture and proceed with the installation of the nose landing gear.

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