Leveling device for wind tunnel test model feature point detection

Abstract

The utility model relates to the technical field of wind tunnel tests, and provides a leveling device used for wind tunnel test model feature point detection, comprising a workbench, the top of the workbench is provided with an installation seat used for installing a test model, four corners of the bottom of the workbench are all provided with leveling mechanisms, and each leveling mechanism comprises a lifting assembly and an angle compensation assembly. The angle compensation assembly comprises a base, a cover plate and a ball head rod, the base is fixedly connected with the workbench, a ball socket is arranged at the bottom of the base, one end of the ball head rod is spherical and matched with the ball socket, the other end of the ball head rod is rod-shaped and connected with the lifting part of the lifting assembly, and the cover plate is connected to the bottom of the base and used for limiting separation of the ball head rod and the base. Compared with the existing adjustment mode, the fine adjustment precision is greatly improved, the operation is simple, and the adjustment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wind tunnel test technical field, more particularly, relate to a kind of leveling device for wind tunnel test model feature point detection. BACKGROUND

[0002] In the development process of wind tunnel test model, model assembly is completed after the key feature points (such as wing leading edge, trailing edge, wing tip, rudder surface, etc.) need to be verified whether the machining error meets the design requirements, to ensure the geometric accuracy of model. When testing, the experimental model needs to be leveled, and a three-coordinate measuring instrument or a height gauge is used for precision testing. At present, leveling methods mainly include manual gasket compensation, simple jig positioning, etc., which have the problems of insufficient fine adjustment accuracy and low adjustment efficiency. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a leveling device for wind tunnel test model feature point detection to solve the above-mentioned defects of the prior art.

[0004] The utility model realizes the following technical scheme:

[0005] A leveling device for wind tunnel test model feature point detection, comprising a workbench, a mounting seat for mounting the test model is arranged on the top of the workbench, leveling mechanisms are arranged at the four corners of the bottom of the workbench, the leveling mechanism comprises a lifting assembly and an angle compensation assembly, the angle compensation assembly comprises a base, a cover plate and a ball head rod, the base is fixedly connected with the workbench, a ball socket is arranged at the bottom of the base, one end of the ball head rod is spherical and matched with the ball socket, the other end of the ball head rod is rod-shaped and connected with the lifting part of the lifting assembly, the cover plate is connected to the bottom of the base to limit the separation of the ball head rod and the base.

[0006] Optionally, the lifting assembly comprises a lead screw, a base, a top seat and two groups of parallel connecting rod mechanisms, the rod-shaped part of the ball head rod is connected with the top seat, the connecting rod mechanism comprises two upper connecting rods and two lower connecting rods which are horizontally symmetrical, the upper connecting rod is hinged to the top seat at the upper end, the lower connecting rod is hinged to the base at the lower end, the lower end of the upper connecting rod is hinged to the upper end of the lower connecting rod on the same side, the two groups of connecting rod mechanisms are rotationally connected with a pin at the corresponding hinge points, the pin at the hinge of the upper connecting rod and the lower connecting rod on one side is rotationally matched with the lead screw, the pin at the hinge of the upper connecting rod and the lower connecting rod on the other side is threadedly matched with the lead screw, one end of the lead screw is connected with a driving member.

[0007] Optionally, a limiting boss is arranged at the middle part of the lead screw, the diameter of the limiting boss is equal to the diameter of the matching hole between the pin and the lead screw, and greater than the large diameter of the thread on the lead screw.

[0008] Optionally, a positioning shoulder is arranged at the end of the lead screw rotationally matched with the pin, one side of the pin abuts against the positioning shoulder, and the other side of the pin is limited by a check ring.

[0009] Optionally, the driving member is a hand wheel.

[0010] Optionally, the rod-shaped part of the ball head rod is provided with a thread, and the lifting part of the lifting assembly is provided with a threaded hole connected with the thread.

[0011] Optionally, the top of the workbench is provided with a plurality of T-shaped grooves in parallel, and the mounting seat is connected with the workbench through bolts, and the T-shaped grooves are used for accommodating the bolt heads.

[0012] Optionally, the two sides of the mounting seat are provided with support seats for supporting the test model.

[0013] The technical scheme of the utility model has at least the following advantages and beneficial effects: in the utility model, through the cooperation of the angle compensation assembly and the lifting assembly, synchronous adjustment of height and angle is realized, when a certain angle is adjusted, the angle compensation assembly can also absorb slight displacement in other directions, mutual interference of four-angle adjustment is avoided, compared with the existing adjustment mode, the fine adjustment precision is greatly improved, the operation is simple, and the adjustment efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structural schematic view of a leveling device for detecting feature points of a wind tunnel test model is provided in the utility model;

[0015] Figure 2 A structural schematic view of a leveling mechanism is provided in the utility model;

[0016] Figure 3 A sectional view of the leveling mechanism is provided in the utility model;

[0017] Figure 4 A Figure 3 enlarged view of A in the utility model is provided in the utility model;

[0018] Fig. 1 is a structural schematic view of a leveling device for detecting feature points of a wind tunnel test model according to the utility model; DETAILED DESCRIPTION

[0019] Referring to Figure 1 A leveling device for detecting feature points of a wind tunnel test model, comprising a workbench 1, the top of the workbench 1 is provided with a mounting seat 5 for mounting a test model, in actual application, the mounting seat 5 cooperates with the mounting surface on the test model, and the test model is fixed on the mounting seat 5 through screws.

[0020] Alternatively, the two sides of the mounting seat 5 are provided with support seats 4 for supporting the test model, and it should be understood that the top of the support seat 4 is provided with a profile that matches the test model, which supports and limits the test model, improves the stability of the test model, and prevents the model from overturning.

[0021] Alternatively, the mounting seat 5 and the support seat 4 are mounted on the workbench 1 in the following manner: The top of the workbench 1 is provided with a plurality of T-shaped grooves in parallel, the T-shaped grooves are used to accommodate the head of the bolt, the mounting seat 5 and the support seat 4 are connected with the workbench 1 by bolts, and in actual application, through holes are provided on the mounting seat 5 and the support seat 4, the head of the bolt (not shown in the figure) is placed in the T-shaped groove, and the bolt rod passes through the through hole on the mounting seat 5 or the support seat 4 and is locked by a nut. It should be noted that the mounting seat 5 and the support seat 4 are mounted on the workbench 1 in the above-mentioned manner, on the one hand, it can facilitate the movement of the mounting seat 5 and the support seat 4, and thus the movement of the test model; on the other hand, it is also convenient to replace the mounting seat 5 and the support seat 4 to satisfy the leveling of different test models.

[0022] The bottom of the workbench 1 is provided with leveling mechanisms at four corners, and the leveling mechanism comprises a lifting assembly 3 and an angle compensation assembly 2. Through the joint action of the angle compensation assembly 2 and the lifting assembly 3, the height and the angle are adjusted synchronously, and when leveling a certain angle, the angle compensation assembly 2 can also absorb the slight displacement in other directions, avoiding the mutual interference of the four-corner adjustment. Compared with the existing adjustment mode, the fine adjustment precision is greatly improved, the operation is simpler, and the adjustment efficiency is improved.

[0023] Reference Figure 2 and Figure 3 Specifically, the angle compensation assembly 2 comprises a base 201, a cover plate 202 and a ball head rod 203. The base 201 is fixedly connected with the workbench 1, and the fixed connection manner is not limited, and welding or screw connection can be selected. The bottom of the base 201 is provided with a ball socket, one end of the ball head rod 203 is spherical and matched with the ball socket, the other end of the ball head is rod-shaped and connected with the lifting part of the lifting assembly 3. The cover plate 202 is connected to the bottom of the base 201, and preferably, the cover plate 202 is connected with the base 201 by screws. It should be understood that the cover plate 202 is used to limit the separation of the ball head rod 203 and the base 201, and at the same time, a spherical pocket-shaped hole should be provided on the cover plate 202. Under the limitation of the cover plate 202, the ball head rod 203 can rotate in any direction within the target range around the ball center.

[0024] As an alternative, the lifting assembly 3 adopts a manual scissor jack structure, and it should be understood that in other embodiments, the lifting assembly 3 can of course adopt other structures in the prior art to realize the lifting function. In the embodiment, the lifting assembly 3 comprises a lead screw 302, a base 303, a top base 304, and two sets of parallel connecting rod mechanisms 301, the top base 304 is connected with the rod-shaped part of the ball head rod 203, the connecting rod mechanism 301 comprises two upper connecting rods and two lower connecting rods which are horizontally symmetrical, the upper connecting rods are hinged at the upper end to the top base 304, the lower connecting rods are hinged at the lower end to the base 303, the lower end of the upper connecting rod is hinged to the upper end of the lower connecting rod on the same side, the lengths of the connecting rods in the connecting rod mechanism 301 are equal, and the whole constitutes a rhombus shape.

[0025] The two sets of connecting rod mechanisms 301 are rotationally connected with the pin shafts at the corresponding hinge points, one pin shaft at the hinge point of the upper connecting rod and the lower connecting rod on one side is rotationally matched with the lead screw 302, and the pin shaft at the hinge point of the upper connecting rod and the lower connecting rod on the other side is rotationally matched with the lead screw 302 through the thread cooperation, one end of the lead screw 302 is connected with a driving member, in this way, the rotation of the lead screw 302 through the driving member can make the pin shaft rotationally matched with the lead screw 302 move along the lead screw 302, so as to make the connecting rod mechanism 301 in the rhombus shape shorten in the horizontal diagonal direction and lengthen in the vertical diagonal direction, thereby realizing the lifting function.

[0026] With reference to Figure 4 , the following improvements are made to the above-mentioned lifting assembly 3, one improvement is that a limiting boss 3021 is arranged at the middle part of the lead screw 302, the diameter of the limiting boss 3021 is equal to the diameter of the matching hole between the pin shaft and the lead screw 302, and is greater than the large diameter of the thread on the lead screw, in this way, the installation is facilitated, and the limiting function is also realized.

[0027] The second improvement is that a positioning shaft shoulder 3022 is arranged at one end of the lead screw 302 rotationally matched with the pin shaft, one side of the pin shaft abuts against the positioning shaft shoulder 3022, and the other side of the pin shaft is limited by the retaining ring 305, that is, the axial displacement of the lead screw 302 is limited by the retaining ring 305 and the positioning shaft shoulder 3022. It should be understood that the retaining ring 305 is used to limit the axial displacement of the part, and is also called a circlip, a snap ring, etc., and is a kind of fastener.

[0028] As an alternative, in the embodiment, the driving member is a hand wheel, that is, manual adjustment. In other embodiments, the driving member can of course also adopt a servo motor to realize electric adjustment.

[0029] With reference to Figure 3 , as an alternative, the rod-shaped part of the ball head rod 203 is provided with a thread, and the lifting part of the lifting assembly 3 is provided with a threaded hole connected therewith, in the embodiment, the lifting assembly 3 adopts the above-mentioned structure, the top base 304 serves as the lifting part of the lifting assembly 3, and then the threaded hole connected with the rod-shaped part of the ball head rod 203 is arranged on the top base 304.

[0030] The preferred embodiments of the present application have been described above with the preferred embodiments, but are not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A leveling device for detecting feature points of a wind tunnel test model, comprising a workbench, the top of which is provided with a mounting base for mounting the test model, characterized in that, The workbench is equipped with a leveling mechanism at each of the four corners at the bottom. The leveling mechanism includes a lifting component and an angle compensation component. The angle compensation component includes a base, a cover plate, and a ball joint rod. The base is fixedly connected to the workbench. The bottom of the base has a ball socket. One end of the ball joint rod is spherical and fits into the ball socket. The other end of the ball joint rod is rod-shaped and connected to the lifting part of the lifting component. The cover plate is connected to the bottom of the base to prevent the ball joint rod from separating from the base.

2. The leveling device for detecting feature points of a wind tunnel test model according to claim 1, characterized in that, The lifting assembly includes a lead screw, a base, a top seat, and two sets of parallel linkage mechanisms. The top seat is connected to the rod-shaped portion of the ball-head rod. The linkage mechanism includes two horizontally symmetrical upper linkages and two lower linkages. The upper end of the upper linkage is hinged to the top seat, and the lower end of the lower linkage is hinged to the base. The lower end of the upper linkage is hinged to the upper end of the lower linkage on the same side. The two sets of linkage mechanisms are rotatably connected to pins at their corresponding hinge points. The pin at the hinge point of one upper linkage and the lower linkage on one side is rotatably engaged with the lead screw, and the pin at the hinge point of the other upper linkage and the lower linkage on the other side is threadedly engaged with the lead screw. One end of the lead screw is connected to a driving component.

3. The leveling device for detecting feature points of a wind tunnel test model according to claim 2, characterized in that, The lead screw has a limiting boss in the middle. The diameter of the limiting boss is equal to the diameter of the mating hole between the pin and the lead screw, and is greater than the major diameter of the thread on the lead screw.

4. The leveling device for detecting feature points of a wind tunnel test model according to claim 2, characterized in that, The lead screw is provided with a positioning shoulder at one end that is rotatably engaged with the pin. One side of the pin abuts against the positioning shoulder, and the other side of the pin is limited by a retaining ring.

5. The leveling device for detecting feature points of a wind tunnel test model according to claim 2, characterized in that, The driving component is a handwheel.

6. The leveling device for detecting feature points of a wind tunnel test model according to any one of claims 1-5, characterized in that, The ball joint has a threaded section on its rod-shaped part, and the lifting part of the lifting assembly has a threaded hole for connection thereto.

7. The leveling device for detecting feature points of a wind tunnel test model according to any one of claims 1-5, characterized in that, The top of the workbench has several T-shaped slots arranged side by side. The mounting base is connected to the workbench by bolts, and the T-shaped slots are used to accommodate the bolt heads.

8. The leveling device for detecting feature points of a wind tunnel test model according to any one of claims 1-5, characterized in that, The mounting base has support bases on both sides for supporting the test model.

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