Small-step-face flatness auxiliary measurement tool

Abstract

The utility model discloses a kind of small step surface flatness auxiliary measurement tool, belong to flatness measurement technical field, including measuring platform, its upper and lower two end surfaces are plane;Placement hole, placement hole is set in the center of the top end plane of measuring platform;Three supporting mechanisms, three supporting mechanisms are evenly distributed in the bottom end of measuring platform.The utility model is placed by setting placement hole on measuring platform, and leveling is carried out by three supporting mechanisms, so that staff realizes the measurement of the selected gage small step surface flatness using micrometer method, solves the technical problem of low measurement efficiency in prior art using three-coordinate measuring machine, and realizes the technical effect of improving the flatness measurement efficiency of selected gage.

Description

Technical Field

[0001] This utility model relates to the field of flatness measurement, and in particular to an auxiliary measuring fixture for the flatness of small step surfaces. Background Technology

[0002] The optional gauge for adjusting the driven bevel gear of the transmission box is a special tool used in the aircraft maintenance system for accurately measuring and selecting the thickness of the shim. The optional gauge must ensure the accuracy of its own step plane in order to improve the measurement accuracy of the workpiece. Therefore, it is necessary to check the flatness of the optional gauge. In the existing technology, the flatness measurement of the optional gauge is usually carried out by a coordinate measuring machine (CMM). The CMM is a measurement program driven measuring device. Using the CMM to measure the flatness of this part requires the establishment of a measurement program, which is time-consuming. Moreover, according to management regulations, a special person must transfer the workpiece to the precision measurement room of the CMM for measurement. The transfer process wastes manpower and time, resulting in the flatness measurement of the optional gauge not being able to meet the production needs in a timely manner. This not only results in high usage costs but also low inspection efficiency. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of low measurement efficiency when using a coordinate measuring machine in the existing technology, and to propose an auxiliary measuring fixture for the flatness of small step surfaces.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A small step surface flatness auxiliary measuring fixture includes a measuring platform. The measuring platform is a circular cylindrical structure with both its upper and lower end faces being flat. The bottom center of the measuring platform is recessed inward to form a hollow, and its edge forms a lip. The placement hole is located at the center of the top plane of the measuring platform. The placement hole is a through hole that penetrates the measuring platform and is compatible with the selected gauge. Three support mechanisms are evenly distributed at the bottom of the measuring platform and abut against the lip of the measuring platform.

[0005] Furthermore, the support mechanism includes: The base is a platform-shaped structure, and a through groove is provided in the center of the base; A support shaft is disposed in a through groove of the base, and the top end of the support shaft abuts against the measuring platform; A rotating disk is disposed at the top of the base and is movably connected to the base. The rotating disk is movably sleeved on the support shaft and is threadedly connected to the support shaft.

[0006] Furthermore, at least one limiting shaft is provided at the bottom end of the support shaft, and the limiting shaft is adapted to the through groove.

[0007] Furthermore, the top of the support shaft is tapered, and the bottom of the measuring platform is provided with several anti-slip grooves that are adapted to the support shaft.

[0008] Furthermore, the support mechanism also includes a fixing module, which is used to fix and lock the support shaft.

[0009] Furthermore, the fixing module includes: A movable groove is formed on the support shaft; A rotating pin is disposed on the base and threadedly connected to the base, with one end of the rotating pin located in the movable groove.

[0010] The beneficial effects of this utility model are as follows: This application solves the technical problem of low measurement efficiency of the selected gauge using a coordinate measuring machine by setting a placement hole on the measuring platform and leveling it with three support mechanisms, enabling workers to measure the flatness of the small step surface of the selected gauge using the micrometer method. This achieves the technical effect of improving the efficiency of flatness measurement of the selected gauge. Attached Figure Description

[0011] Figure 1 A schematic diagram of an auxiliary measuring fixture for flatness measurement of a small step surface provided by this utility model. Figure 1 ; Figure 2 A schematic diagram of an auxiliary measuring fixture for flatness measurement of a small step surface provided by this utility model. Figure 2 ; Figure 3 A schematic diagram of the support mechanism structure provided by this utility model; Figure 4 This is a cross-sectional structural diagram of the support mechanism provided by this utility model.

[0012] The markings in the diagram are as follows: 1. Measuring platform; 11. Anti-slip grooves; 2. Placement hole; 3. Support mechanism; 31. Base; 311. Through groove; 32. Support shaft; 321. Limiting shaft; 33. Rotating disk; 34. Fixed module; 341. Movable groove; 342. Rotating pin. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0015] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0016] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0017] Reference Figures 1 to 4 As shown, a small step surface flatness auxiliary measuring fixture is used in practical applications to measure the flatness of a small step surface using a micro gauge. It includes a measuring platform 1, a placement hole 2 set on the measuring platform 1, and three support mechanisms 3 adapted to the measuring platform 1.

[0018] Specifically, the measuring platform 1 is a circular cylindrical structure with both its upper and lower end faces having a flatness of less than 0.02 mm. To reduce the weight of the measuring platform 1, the bottom center of the measuring platform 1 is recessed inward to form a hollow shape, and its edges are formed with a lip to further reduce its weight. The placement hole 2 is located at the center of the top plane of the measuring platform 1. The placement hole 2 is a through hole that penetrates the measuring platform 1, and it is adapted to the optional gauge. That is, the diameter and shape of the placement hole 2 are adapted to the diameter and shape of the optional gauge to ensure that at least one part of the optional gauge can pass through the placement hole 2. In other words, when it is necessary to measure the optional gauge, it can be inserted into the placement hole 2, so that one of the stepped surfaces of the optional gauge is in contact with the upper end face of the measuring platform 1, thereby allowing the optional gauge to be placed stably on the measuring platform 1. The three support mechanisms 3 are evenly distributed at the bottom of the measuring platform 1 and abut against the lip of the measuring platform 1 to support the measuring platform 1. The reason for this is that, according to the technical specifications, when using the micrometer method to detect flatness, a standard plate is used as the measuring base. The three furthest points of the measured plane are adjusted to be at the same height by the support. The micrometer is used to measure the measured plane at each point on the measured surface or according to a certain layout. The difference between the maximum and minimum readings of the micrometer is used as an approximation of the flatness error value. Therefore, three support mechanisms 3 are used, and the measuring base formed by the measuring platform 1 can be kept horizontal by adjusting the support structure, thereby reducing the error in the flatness measurement results of the selected gauge.

[0019] Please refer to Figures 3 to 4As shown, in this embodiment, for ease of explanation, the support mechanism 3 is described as a single support mechanism 3. The support mechanism 3 includes a base 31, a support shaft 32 connected to the base 31, and a rotating disk 33 connected to the support shaft 32. The base 31 has a platform-like structure that is narrower at the top and wider at the bottom, meaning the cross-sectional diameter of the base 31 gradually increases from the top to the bottom, lowering the center of gravity and making it more stable when placed on a worktable. A through slot 311 is formed at the center of the base 31. The support shaft 32 is movably disposed within the through slot 311 of the base 31, and its top end abuts against the measuring platform 1, thus supporting the measuring platform 1 via the support shaft 32. The rotating disk 33 is disposed at the top of the base 31 and is movably connected to the base 31. The rotating disk 33 is movably sleeved on the support shaft 32. Specifically, the support shaft 32 has an external thread, and the rotating disk 33 has an external thread that matches the internal thread. The rotating disk 33 is threaded to the support shaft 32 through the engagement of the external and internal threads. That is, by rotating the rotating disk 33, the support shaft 32 can be moved along the path of the through groove 311 within the base 31. Thus, on some uneven workbenches, when the measuring platform 1 is tilted or its top plane is not horizontal, the tilt of the measuring platform 1 can be adjusted by raising or lowering the support shaft 32 in different support mechanisms 3 until the measuring platform 1 is horizontal. Preferably, one side of the rotating disk 33 has anti-slip texture to facilitate the gripping of the rotating disk 33 by the operator.

[0020] In some preferred embodiments, the bottom end of the through groove 311 expands outward to form a stepped surface, and the bottom end of the support shaft 32 is provided with at least one limiting shaft 321, which is adapted to the stepped surface of the through groove 311, thereby limiting the movement distance of the support shaft 32.

[0021] In some preferred embodiments, the top end of the support shaft 32 is tapered, and the bottom end of the measuring platform 1 is provided with several anti-slip grooves 11 adapted to the support shaft 32. Firstly, this reduces the contact area between the support shaft 32 and the measuring platform 1, thereby improving the adjustment accuracy of the tilt angle of the measuring platform 1. Secondly, the anti-slip grooves 11 allow the support shaft 32 to quickly adapt to the measuring platform 1, while preventing the support shaft 32 from shifting when in contact with the measuring platform 1. Furthermore, the pitch of the internal thread and the external thread is set to 1mm to reduce the distance the support shaft 32 moves for one revolution of the rotating disk 33, making the movement of the support shaft 32 more precise.

[0022] In this embodiment, the support mechanism 3 further includes a fixing module 34, which is disposed on the base 31 and located on one side of the base 31. The fixing module 34 is used to fix and lock the support shaft 32 after the measuring platform 1 is leveled, preventing the support shaft 32 from rotating due to accidental contact with the rotating disk 33. Specifically, the fixing module 34 includes a movable groove 341 and a rotating pin 342 disposed on the base 31. The movable groove 341 is formed on the support shaft 32. The rotating pin 342 is disposed on the base 31 near the movable groove 341 and is threadedly connected to the base 31. One end of the rotating pin 342 is located in the movable groove 341. On the one hand, when the support column moves, it can be positioned by the rotating pin 342 to prevent excessive friction between the support shaft 32 and the rotating disk 33 from causing the support shaft 32 to rotate. On the other hand, when it is necessary to fix the support shaft 32, the rotating pin 342 can be rotated so that the end of it located in the movable groove 341 abuts against the support shaft 32, thereby fixing and locking the support shaft 32 by the friction between the rotating pin 342 and the support shaft 32.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tooling for auxiliary measurement of the flatness of a small step surface, characterized in that, include: The measuring platform (1) is a circular columnar structure with both its upper and lower end faces being flat. The bottom center of the measuring platform (1) is recessed inward to form a hollow, while its edge forms a lip. Placement hole (2), the placement hole (2) is located at the center of the top plane of the measuring platform (1), the placement hole (2) is a through hole that penetrates the measuring platform (1), and the placement hole (2) is compatible with the selected gauge; Three support mechanisms (3) are evenly distributed at the bottom of the measuring platform (1) and abut against the lip of the measuring platform (1).

2. The auxiliary measuring fixture for the flatness of a small step surface according to claim 1, characterized in that, The support mechanism (3) includes: The base (31) is a platform-shaped structure, and a through groove (311) is provided at the center of the base (31). A support shaft (32) is disposed in the through groove (311) of the base (31), and the top end of the support shaft (32) abuts against the measuring platform (1); Rotating disk (33) is located at the top of the base (31) and is movably connected to the base (31). The rotating disk (33) is movably sleeved on the support shaft (32) and is threadedly connected to the support shaft (32).

3. The auxiliary measuring fixture for the flatness of a small step surface according to claim 2, characterized in that, The bottom end of the support shaft (32) is provided with at least one limiting shaft (321), which is adapted to the through groove (311).

4. The auxiliary measuring fixture for the flatness of a small step surface according to claim 2, characterized in that, The top of the support shaft (32) is tapered, and the bottom of the measuring platform (1) is provided with several anti-slip grooves (11) that are compatible with the support shaft (32).

5. The auxiliary measuring fixture for the flatness of a small step surface according to claim 2, characterized in that, The support mechanism (3) further includes a fixing module (34), which is used to fix and lock the support shaft (32).

6. The auxiliary measuring fixture for the flatness of a small step surface according to claim 5, characterized in that, The fixed module (34) includes: The movable groove (341) is formed on the support shaft (32); Rotating pin (342), the rotating pin (342) is disposed on the base (31) and threadedly connected to the base (31), one end of the rotating pin (342) is located in the movable groove (341).

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