Positioning tool for elevator

Abstract

The utility model belongs to the technical field of aircraft manufacturing, and discloses an elevator positioning tool which comprises a cross beam and a plug block, the cross beam is provided with a plurality of positioning assemblies, the positioning assemblies are matched to enable the cross beam to be positioned relative to a horizontal stabilizer of an empennage, and one end of the cross beam extends to the lower portion of the edge of an elevator and is provided with a supporting piece. An inspection gap is formed between the supporting piece and the skin of the elevator; the plug block is in lap joint with the supporting piece and is contained in the inspection gap. Wherein the plug block has various height sizes. The deviation range of the elevator can be judged and adjusted by observing and adjusting the gaps between the elevator and the plug blocks with different heights, then the elevator is positioned within the allowable error range near the zero position, the positioning precision of the elevator is improved, meanwhile, the elevator positioning tool is simple in structure and convenient to operate, the labor cost of elevator positioning can be reduced, and the working efficiency is improved. The assembling efficiency is improved, and efficient and high-quality assembling is achieved.

Description

Technical Field

[0001] This utility model relates to the field of aircraft manufacturing technology, and in particular to an elevator positioning fixture. Background Technology

[0002] On civil aircraft, the tail section is equipped with a tail fin. The elevator is connected to the tail fin via multiple sets of hinged joints to achieve vertical tilting, thereby ensuring the aircraft's flight stability and the execution of flight maneuvers. Aircraft are large vehicles that must ensure stability and safety during cruise. This requires an extremely high degree of fit between the horizontal stabilizer of the elevator and the tail fin. During elevator assembly, tooling must be used to ensure that the center distance between the mounting hole of the hinge joint used to install the elevator actuator and the center distance between the mounting hole of the hinge joint on the tail fin is within the theoretical distance, that is, to ensure that the elevator is in the zero position.

[0003] However, in current aircraft assembly processes, the elevator's zero-position positioning is determined solely by using tooling to ensure the distance between the hinge joint mounting holes. This method fails to account for manufacturing errors in the horizontal stabilizer, elevator shape, and hinge joint positioning, resulting in poor accuracy and significant deviations in elevator zero-position positioning. Furthermore, it cannot guarantee a high degree of fit between the elevator's shape and the tail section's shape. Utility Model Content

[0004] The purpose of this invention is to provide an elevator positioning fixture to improve the positioning accuracy of the elevator zero position and achieve efficient and high-quality assembly.

[0005] To achieve this objective, the present invention adopts the following technical solution: an elevator positioning fixture, comprising a crossbeam and a stop block. The crossbeam is provided with multiple positioning components, which cooperate to position the crossbeam relative to the horizontal stabilizer of the tail fin. One end of the crossbeam extends to the lower edge of the elevator on the side away from the tail fin and is provided with a support member. An inspection gap is formed between the support member and the skin of the elevator. The stop block overlaps the support member and is accommodated in the inspection gap. The elevator has a zero position posture with a standard streamline shape relative to the tail fin and extreme postures located on both sides of the zero position posture along the rotation direction of the elevator. The stop block has multiple height dimensions, wherein two stop blocks with different height dimensions can respectively abut against the elevator in two different extreme postures.

[0006] Preferably, the tail fin is provided with a plurality of positioning parts at intervals, and the positioning assembly includes a first positioning member and a second positioning member. The first positioning member is connected to the crossbeam and abuts against the tail fin to position the crossbeam in the height direction. The second positioning member is correspondingly connected to the positioning parts to position the crossbeam in a first direction and a second direction. The height direction, the first direction and the second direction are perpendicular to each other.

[0007] Preferably, the positioning part is configured as a positioning hole, and the second positioning member is configured as a positioning pin that is inserted into the positioning hole.

[0008] Preferably, the first positioning member includes a positioning block and a pressing block. The pressing block is disposed on one side of the positioning block and abuts against the tail fin. The positioning block is disposed along the normal direction of the contact surface between the pressing block and the tail fin so that the pressing block and the tail fin fit together.

[0009] Preferably, the side wall of the crossbeam is provided with a positioning platform, and the first positioning member is connected to the positioning platform.

[0010] Preferably, the positioning component further includes a connector that is connected to the crossbeam and detachably connected to the tail fin.

[0011] Preferably, the crossbeam is provided with a plurality of test pieces, which are arranged at intervals along the extension of the crossbeam. The plurality of test pieces are used for an external testing instrument to detect the relative positions between the plurality of test pieces in order to determine the shape accuracy of the crossbeam.

[0012] Preferably, along the height direction, the height of the top surface of the tested component is less than or equal to the height of the top surface of the positioning component.

[0013] Preferably, the support member has a support surface parallel to the edge of the elevator on the side facing the elevator, and the plug overlaps the support surface.

[0014] Preferably, the crossbeam is a hollow beam, and at least a portion of the sidewalls of the crossbeam are provided with openwork sections.

[0015] The beneficial effects of this invention are as follows: By setting up a positioning component, the user can position the crossbeam onto the horizontal stabilizing surface of the tail fin. The support at the end of the crossbeam uses the positioned crossbeam as a reference to ensure the positional accuracy of the support. The height of the inspection gap formed between the support and the elevator can indirectly indicate the deviation between the actual position of the elevator and the zero position. By observing and adjusting the gap between the elevator and the blocks at different heights, the deviation range of the elevator can be determined and adjusted, thereby positioning the elevator within the allowable error range near the zero position, improving the positioning accuracy of the elevator, and improving the fit between the elevator shape and the tail fin shape. At the same time, the elevator positioning fixture has a simple structure and is easy to operate, which can significantly reduce the labor cost of elevator positioning, improve assembly efficiency, and achieve efficient and high-quality assembly. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the elevator positioning fixture of this utility model;

[0017] Figure 2 This is an installation diagram of the elevator positioning fixture of this utility model;

[0018] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a top view of the elevator positioning fixture of this utility model;

[0020] Figure 5 This is a side view of the elevator positioning fixture of this utility model.

[0021] In the diagram: 100, crossbeam; 110, positioning assembly; 111, first positioning component; 1111, positioning block; 1112, pressing block; 112, second positioning component; 113, connecting component; 120, support component; 121, support surface; 130, inspection gap; 140, positioning platform; 150, tested component; 160, hollow part; 200, plug; 300, tail fin; 400, elevator. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0026] Reference Figures 1 to 5 As shown, the elevator positioning fixture of this embodiment includes a crossbeam 100 and a stop block 200. Optionally, the crossbeam 100 is a high-strength alloy part, and the crossbeam 100 has a square shape. The crossbeam 100 is provided with a plurality of positioning components 110, which are spaced apart along the direction of the crossbeam 100. The crossbeam 100 is connected to the tail fin 300 through the positioning components 110, and the plurality of positioning components 110 cooperate to position the crossbeam 100 relative to the horizontal stabilizer of the tail fin 300. One end of the crossbeam 100 extends along the direction of the tail fin 300 toward the elevator 400 to below the edge of the elevator 400 on the side away from the tail fin 300. The end of the crossbeam 100 located below the elevator 400 is provided with a support member 120. Optionally, the support member 120 is a rod, block, or platform structure connected to the crossbeam 100 and extending toward the elevator 400.

[0027] An inspection gap 130 is formed between the upper surface of the support member 120 and the lower surface skin of the elevator 400; the plug 200 overlaps the support member 120 and is accommodated in the inspection gap 130, and the plug 200 can slide relative to the support member 120; wherein, the elevator 400 has a zero position posture with a standard streamline shape to the tail 300 (at this time, the distance between the center of the mounting hole of the hinge joint for mounting the elevator actuator and the center of the mounting hole of the hinge joint on the tail 300 is at the theoretical distance), and extreme postures located on both sides of the zero position posture along the rotation direction of the elevator 400. The extreme posture is the posture of the elevator 400 at the extreme position that it can deviate from the zero position posture within the allowable range of assembly error.

[0028] The stopper block 200 has multiple height dimensions, with two stopper blocks 200 of different height dimensions able to abut against the elevator 400 in two different extreme postures. Optionally, the stopper block 200 can also be set to a standard height, with the standard-height stopper block 200 abutting against the elevator 400 in the zero-position posture. Specifically, the dimensions of the crossbeam 100, the height of the support member 120, and the height of the stopper block 200 are precisely calculated and designed so that after the crossbeam 100 is positioned and the elevator 400 is in the zero position, the lower surface of the elevator 400 abuts against the standard-height stopper block 200. In other words, if the height of the inspection gap 130 is equal to the standard height of the stopper block 200, the elevator 400 is in the zero position.

[0029] Understandably, by setting the positioning component 110, the user can position the crossbeam 100 onto the tail fin 300. The support member 120 at the end of the crossbeam 100 uses the positioned crossbeam 100 as a reference to ensure the positional accuracy of the support member 120. This allows the height of the inspection gap 130 formed between the support member 120 and the elevator 400 to indirectly represent the deviation between the actual position and the zero position of the elevator 400. By observing and adjusting the gap between the elevator 400 and the stop blocks 200 at different heights, the actual attitude of the elevator 400 can be determined and adjusted, thereby positioning the elevator within the allowable error range near the zero position.

[0030] Specifically, the positioning process can be divided into the following steps:

[0031] Step 1: Before positioning the crossbeam 100, the user can attach the smaller limit height plug 200 to the support 120. If there is interference between the elevator 400 and the plug 200 during the installation and positioning of the crossbeam 100, it means that the installation position of the elevator 400 is too low relative to the zero position, and the position of the elevator 400 needs to be adjusted to be higher.

[0032] Step 2: After the crossbeam 100 is positioned, if there is a gap between the elevator 400 and the plug 200, replace the plug 200 with the one with the larger limit height and insert it into the test gap 130. If it can be inserted, it means that the installation position of the elevator 400 is too high relative to the zero position, and the position of the elevator 400 needs to be lowered.

[0033] Step 3: If, during the positioning of the crossbeam 100, the elevator 400 does not contact the stopper block 200 with the smaller limit height, and after the crossbeam 100 is positioned, the stopper block 200 with the larger limit height cannot be inserted into the inspection gap 130, it indicates that the elevator 400's posture is between two extreme postures, meaning the elevator 400's positional error is within the design allowable range. In this case, the user can directly proceed with the subsequent hinge assembly, or the standard-height stopper block 200 can be overlapped on the support 120, and the elevator 400 can be rotated until its lower surface contacts the stopper block 200, positioning the elevator 400 to the standard zero position before proceeding with the subsequent hinge assembly. Alternatively, without considering the elevator 400's position being slightly lower than the zero position, the standard-height stopper block 200 can be used from the beginning for positioning, further accelerating the positioning efficiency.

[0034] Using the crossbeam 100 positioned relative to the tail fin 300 as a reference, the elevator 400 is positioned and adjusted by inserts 200 of different heights. This positioning process is independent of the shapes of the tail fin 300 and the elevator 400, eliminating manufacturing errors in the horizontal stabilizer of the tail fin 300 and the elevator 400, and correcting positioning errors in the hinge joints. This effectively improves the positioning accuracy of the elevator 400. Furthermore, using inserts 200 of standard height for positioning adjustment further enhances the elevator 400's positioning accuracy, ensuring a high degree of fit between the elevator 400's shape and the horizontal stabilizer of the tail fin 300. Simultaneously, the elevator 400 positioning fixture has a simple structure and is easy to operate, significantly reducing labor costs for elevator 400 positioning, improving on-site assembly efficiency, and achieving efficient and high-quality assembly.

[0035] Furthermore, the positioning component 110 also includes a connector 113, which is connected to the crossbeam 100 and detachably connected to the tail fin 300. Optionally, the connector 113 can be detachably connected to the crossbeam 100 by means of screwing, snap-fitting, pinning, etc., or it can be fixedly connected to the crossbeam 100 by means of welding, riveting, etc. The connector 113 can also be detachably connected to the tail fin 300 by means of screwing, snap-fitting, pinning, etc.

[0036] By setting the connector 113, when positioning the crossbeam 100, the user can fix the crossbeam 100 to the tail wing 300 through the connector 113. On the one hand, it saves the increased operating costs of using external support structures or manual support for the positioning device, improves the integration of the positioning device, and further improves on-site assembly efficiency. On the other hand, the connection between the connector 113 and the tail wing 300 can also play an auxiliary positioning role, further improving the positional accuracy of the crossbeam 100.

[0037] Reference Figure 1 and Figure 2 As shown, it can be understood that the tail fin 300 is provided with multiple positioning parts at intervals. The positioning component 110 includes a first positioning member 111 and a second positioning member 112. The first positioning member 111 is connected to the crossbeam 100 and abuts against the tail fin 300 to position the crossbeam 100 in the height direction. The second positioning member 112 is correspondingly connected to the positioning parts to position the crossbeam 100 in the first direction and the second direction. The first direction, the second direction and the height direction are perpendicular to each other. The first direction and the second direction are the spanwise and heading of the tail fin 300.

[0038] Optionally, the positioning part can be a hole, groove, protrusion, or the like provided on the lower surface of the tail fin 300. The first positioning member 111 can be a block, rod, or protrusion extending toward the tail fin 300 on the crossbeam 100. The end face of the first positioning member 111 can fit against the skin of the lower surface of the tail fin 300. The second positioning member 112 can be a shaft, protrusion, or groove that matches the positioning part and is provided on the first positioning member 111.

[0039] By setting a first positioning element 111 and a second positioning element 112, the first positioning element 111 positions the height reference of the crossbeam 100, and multiple second positioning elements 112 and multiple positioning parts are correspondingly set to position the spanwise and heading references of the crossbeam 100. The first positioning element 111 and the second positioning element 112 cooperate to position the spatial reference of the crossbeam 100. Compared with single-point positioning, the cooperation of multiple second positioning elements 112 and multiple positioning parts can significantly improve the positioning accuracy of the crossbeam 100 and improve the accuracy of the subsequent positioning of the plug block 200.

[0040] Furthermore, the positioning part is configured as a positioning hole, and the second positioning element 112 is configured as a positioning pin that fits with the positioning hole with clearance. Specifically, before zero-positioning the elevator 400, multiple horizontal measurement points can be measured on the tail fin 300, and holes are made at the locations of the horizontal measurement points, which are the positioning holes.

[0041] By optimizing the structure of the tail fin 300, the positioning part is configured as a positioning hole opened at the horizontal measurement point. This eliminates the need to find a distant reference when the positioning device is in position, ensuring that the positioning part can accurately position the spanwise and heading references of the crossbeam 100 in cooperation with the second positioning component 112. The positioning hole at the horizontal measurement point has high opening accuracy and a fragile structure, and cannot withstand large stress. The second positioning component 112 is set as a positioning pin that is inserted into the positioning hole. While ensuring accuracy, the stress between the positioning pin and the positioning hole can be reduced, preventing the positioning hole from breaking and improving the structural rationality of the positioning device.

[0042] Reference Figure 3 As shown, it can be understood that the support member 120 has a support surface 121 parallel to the edge of the elevator 400 on the side facing the elevator 400, and the plug 200 overlaps the support surface 121. Depending on the design requirements, the edge of the elevator 400 on the side away from the tail fin 300 (i.e., the trailing edge of the elevator 400) has different shapes, and the trailing edge of the elevator 400 may be tilted upward, tilted downward, or in a horizontal position.

[0043] By setting a support surface 121 parallel to the rear edge of the elevator 400, the height of the inspection gap 130 formed between the support 120 and the elevator 400 along the traveling direction of the plug 200 remains constant. This ensures that the plug 200 remains in contact with the support 120 during insertion, preventing changes in the angle or shape of the support 120 or the rear edge of the elevator 400 from affecting the positioning effect of the plug 200 and further improving the positioning accuracy of the plug 200.

[0044] Reference Figure 4 and Figure 5 As shown, it can be understood that the first positioning member 111 includes a positioning block 1111 and a pressing block 1112. The positioning block 1111 and the pressing block 1112 are perpendicular to each other, and a reinforcing rib to increase strength is provided between the positioning block 1111 and the pressing block 1112. The pressing block 1112 is disposed on one side of the positioning block 1111 and abuts against the tail fin 300. The positioning block 1111 is disposed along the normal direction at the connection between the pressing block 1112 and the tail fin 300 so that the pressing block 1112 and the tail fin 300 fit together.

[0045] The tail fin 300 has a streamlined shape; therefore, the contact portion between the first positioning member 111 and the tail fin 300 is not necessarily a horizontal plane, but may be an inclined plane with a certain angle. The first positioning member 111 is configured as a positioning block 1111 positioned along the normal direction of the contact surface and a pressing block 1112 connected to the positioning block 1111. This ensures that the pressing block 1112 can partially fit against the inclined tail fin 300, effectively improving the positioning accuracy of the first positioning member 111.

[0046] Optionally, the connector 113 can be configured as a right-angled plate with screws, similar in structure to the first positioning member 111. The connector 113 abuts against the tail wing 300 and is detachably connected to the tail wing 300 by screws. In this case, the only difference between the connector 113 and the first positioning member 111 is that the connector 113 is fitted with screws, while the first positioning member 111 is fitted with the second positioning member 112 (positioning pin), thereby improving the structural consistency of the positioning assembly 110 and reducing the design and manufacturing cost of the positioning device.

[0047] Furthermore, the side wall of the crossbeam 100 is provided with a positioning platform 140, and the first positioning element 111 is connected to the positioning platform 140.

[0048] As described above, the positioning block 1111 of the first positioning member 111 is set along the normal direction of the contact surface between the pressing block 1112 and the tail wing 300. When the contact position is not horizontal, the first positioning member 111 will tilt at a certain angle. In order to ensure the positioning accuracy of the first positioning member 111, it is necessary to precisely control the tilt angle of the first positioning member 111.

[0049] By setting up the positioning platform 140, compared with the traditional method of positioning the first positioning component 111 based on the entire crossbeam 100, the positioning platform 140 has a smaller width, which can reduce the reference range for setting the first positioning component 111, improve the accuracy of the reference of the first positioning component 111, and ensure the accurate setting of the first positioning component 111.

[0050] Continue to refer to Figure 4 and Figure 5 As shown, it can be understood that the crossbeam 100 is provided with multiple test pieces 150, which are spaced apart along the direction of the crossbeam 100. These test pieces 150 are used by an external testing instrument to detect the relative positions between them to determine the dimensional accuracy of the crossbeam 100. Optionally, the test pieces 150 are protruding structures such as blocks, cones, or pedestals that are welded and fixed to the crossbeam 100.

[0051] By setting multiple test pieces 150, users can use an external laser detector to inspect the shape of the test pieces 150 and measure the OTP points. Then, based on the coordinate parameters of the OTP points of different test pieces 150, the shape of the crossbeam 100 can be determined. This helps users determine whether there are any hard defects such as bending or twisting in the shape of the crossbeam 100 that affect accuracy, thus avoiding the use of crossbeams 100 with unqualified shapes that affect the accuracy of subsequent positioning and further improving the accuracy of the positioning device.

[0052] Furthermore, along the height direction, the top surface height of the tested component 150 is less than or equal to the top surface height of the positioning component 110.

[0053] The height of the test component 150 is set lower than the height of the positioning component to avoid interference between the test component 150 and the tail fin 300 or elevator 400 during the positioning process of the crossbeam 100, which would affect the positioning structure.

[0054] Reference Figure 1 and Figure 5 As shown, it can be understood that the beam 100 is a hollow beam, and at least part of the sidewall of the beam 100 is provided with a hollow portion 160. Optionally, the hollow portion 160 can be a through-hole structure, a mesh structure, etc., and the shape of the hollow portion 160 can be set according to the requirements, which will not be described in detail here.

[0055] Setting the crossbeam 100 as a hollow beam and providing a hollow section 160 on the side wall of the crossbeam 100 can effectively reduce the weight of the crossbeam 100, facilitate the transportation and use of the crossbeam 100, and effectively improve the user experience.

[0056] In addition, in order to ensure the overall rigidity of the crossbeam 100, the hollow part 160 is usually not set on all the side walls of the crossbeam 100, but on the two side walls of the crossbeam 100.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An elevator positioning fixture, applied to the tail (300) and elevator (400) of an aircraft, wherein the tail (300) and elevator (400) are hinged, characterized in that, The elevator positioning fixture includes: A crossbeam (100) is provided with a plurality of positioning components (110), which cooperate to position the crossbeam (100) relative to the horizontal stabilizer of the tail fin (300). One end of the crossbeam (100) extends to the lower edge of the elevator (400) on the side away from the tail fin (300) and is provided with a support member (120). An inspection gap (130) is formed between the support member (120) and the skin of the elevator (400). A plug (200) overlaps the support (120) and is accommodated in the inspection gap (130); The elevator (400) has a zero position posture that is in a standard streamline shape with the tail fin (300) and extreme postures located on both sides of the zero position posture along the rotation direction of the elevator (400). The plug (200) has multiple height dimensions, and two plugs (200) with different height dimensions can respectively abut against the elevator (400) in two different extreme postures.

2. The elevator positioning fixture according to claim 1, characterized in that, The tail fin (300) is provided with a plurality of positioning parts at intervals. The positioning assembly (110) includes a first positioning member (111) and a second positioning member (112). The first positioning member (111) is connected to the crossbeam (100) and abuts against the tail fin (300) to position the crossbeam (100) in the height direction. The second positioning member (112) is correspondingly connected to the positioning parts to position the crossbeam (100) in a first direction and a second direction. The height direction, the first direction and the second direction are perpendicular to each other.

3. The elevator positioning fixture according to claim 2, characterized in that, The positioning part is configured as a positioning hole, and the second positioning member (112) is configured as a positioning pin that is inserted into the positioning hole.

4. The elevator positioning fixture according to claim 2, characterized in that, The first positioning member (111) includes a positioning block (1111) and a pressing block (1112). The pressing block (1112) is disposed on one side of the positioning block (1111) and abuts against the tail fin (300). The positioning block (1111) is disposed along the normal direction of the contact surface between the pressing block (1112) and the tail fin (300) so that the pressing block (1112) and the tail fin (300) fit together.

5. The elevator positioning fixture according to any one of claims 2-4, characterized in that, The side wall of the crossbeam (100) is provided with a positioning platform (140), and the first positioning member (111) is connected to the positioning platform (140).

6. The elevator positioning fixture according to any one of claims 1-4, characterized in that, The positioning component (110) also includes a connector (113) which is connected to the crossbeam (100) and detachably connected to the tail fin (300).

7. The elevator positioning fixture according to claim 1, characterized in that, The crossbeam (100) is provided with a plurality of test pieces (150), which are spaced apart along the extension direction of the crossbeam (100). The plurality of test pieces (150) are used for external testing instruments to detect the relative positions between the plurality of test pieces (150) in order to determine the shape accuracy of the crossbeam (100).

8. The elevator positioning fixture according to claim 7, characterized in that, Along the height direction, the top surface height of the test piece (150) is less than or equal to the top surface height of the positioning component (110).

9. The elevator positioning fixture according to claim 1, characterized in that, The support member (120) has a support surface (121) on the side facing the elevator (400) that is parallel to the edge of the elevator (400), and the plug (200) overlaps the support surface (121).

10. The elevator positioning fixture according to claim 1, characterized in that, The crossbeam (100) is a hollow beam, and at least a portion of the sidewalls of the crossbeam (100) are provided with a hollow portion (160).

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