Measuring jig

Abstract

The utility model discloses a measuring jig which comprises a jig plate assembly and an elastic mechanism, the jig plate assembly comprises an upper plate and a lower plate, the upper plate, the elastic mechanism and the lower plate are detachably connected, a first clamping groove is formed in the connecting face of the upper plate, and a second clamping groove is formed in the connecting face of the upper plate. A second clamping groove corresponding to the first clamping groove is formed in the connecting face of the lower plate. According to the utility model, when the size of the lens cone is measured, the lens cone does not need to be taken down from the measuring jig to measure the other side, so that inaccurate measurement data caused by disassembly damage can be reduced, and the measurement accuracy and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of jigs, in particular to a measuring jig. Background Art

[0002] As is well known, a three-dimensional measuring instrument can accurately measure parameters such as the size and angle of various workpieces (such as threaded parts). The three-dimensional measuring instrument can perform accurate dimensional measurement of the workpiece in a three-dimensional space through its high-precision probe system.

[0003] However, through the research of the inventor, it is found that in the actual measurement process, when using a planar L-shaped jig to assist a three-dimensional measuring instrument (as shown in Figure 1 ) to measure a double-headed lens barrel, the three-dimensional measuring instrument can only measure with the Z-axis. At this time, the double-headed lens barrel can only be placed on the L-shaped jig on one side to measure the inner diameter size of surface A. When measuring the inner diameter size of surface B, the double-headed lens barrel needs to be placed upside down.

[0004] Since the double-headed lens barrel needs to be fixed with glue when placed on the planar L-shaped jig, during the process of manually turning the double-headed lens barrel over by hand, it is very easy to cause scratches on the lens barrel, resulting in inaccurate inner diameter size and concentricity of surface B measured, and the measurement data is prone to errors, and the measurement efficiency is low. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a measuring jig to solve the problems of poor accuracy and low measurement efficiency existing when the existing L-shaped jig is used to match a three-dimensional measuring instrument to measure the size of a double-headed lens barrel.

[0006] To solve the above technical problem, the technical solution adopted by the utility model is: a measuring jig, which includes a jig plate assembly and an elastic mechanism. The jig plate assembly includes an upper plate and a lower plate. The upper plate is detachably connected to the lower plate through the elastic mechanism. A first card slot is opened on the connecting surface of the upper plate, and a second card slot corresponding to the first card slot is opened on the connecting surface of the lower plate.

[0007] Further, in the measuring jig of the utility model, the elastic mechanism includes a bolt and an elastic member, and the elastic member is sleeved on the bolt.

[0008] Further, in the measuring jig of the utility model, a first groove is opened on the connecting surface of the upper plate, and a second groove is opened on the connecting surface of the lower plate. Wherein, one end of the elastic member abuts against the bottom of the first groove, and the other end abuts against the bottom of the second groove.

[0009] Further, in the measuring fixture of the present utility model, one end of the bolt is arranged in the upper plate, and the other end of the bolt is movably arranged in the lower plate.

[0010] Further, in the measuring fixture of the present utility model, it includes two elastic mechanisms, and the two elastic mechanisms are arranged side by side.

[0011] Further, in the measuring fixture of the present utility model, it further includes positioning columns, and the positioning columns are arranged in the fixture plate assembly.

[0012] Further, in the measuring fixture of the present utility model, the positioning columns are located between the two elastic mechanisms.

[0013] Further, in the measuring fixture of the present utility model, a first counterbore is formed on the upper plate, and a positioning hole is formed on the lower plate. Wherein, one end of the positioning column is arranged in the first counterbore, and the other end of the positioning column is arranged in the positioning hole.

[0014] Further, in the measuring fixture of the present utility model, a clamping block is arranged on the upper plate, and a third clamping groove adapted to the clamping block is arranged on the lower plate.

[0015] Further, in the measuring fixture of the present utility model, the first counterbore penetrates through the clamping block, and the positioning hole is communicated with the third clamping groove.

[0016] The beneficial effects of the present utility model are as follows: In the measuring fixture of the present utility model, the fixture plate assembly includes an upper plate and a lower plate detachably connected through an elastic mechanism. When it is necessary to use this measuring fixture in cooperation with a three-coordinate measuring instrument to measure a double-headed lens barrel, the double-headed lens barrel can be first placed on the measuring station of the measuring fixture in an open state, and then the measuring fixture is changed from the open state to the locked state through the elastic mechanism, that is, the upper plate and the lower plate are locked. During the process of locking the upper plate and the lower plate, the first clamping groove and the second clamping groove approach each other. Correspondingly, the double-headed lens barrel located therein will ultimately be fixed. At this time, the three-coordinate measuring instrument can be used for measurement. The measuring fixture is fixed on the corresponding plane. The three-coordinate measuring instrument can first use a probe to measure surface A. After measuring surface A, the three-coordinate measuring instrument can automatically use the probe on the other side to measure surface B. In this measurement process, the double-headed lens barrel does not need to be disassembled again, that is, it is not necessary to remove the lens barrel from the measuring fixture and then measure the other surface, thereby reducing the inaccurate measurement data caused by disassembly damage, improving the measurement accuracy and efficiency, and further improving the utilization rate of the machine and the acceptance rate of the product. Description of the Drawings

[0017] Figure 1 It is a combined schematic diagram of a planar L-shaped fixture and a lens barrel in the prior art from one perspective;

[0018] Figure 2 The structural schematic diagram of the lens barrel according to the present utility model from a perspective in an embodiment;

[0019] Figure 3 The structural schematic diagram of the measuring fixture according to the present utility model from a perspective in an embodiment;

[0020] Figure 4 The structural schematic diagram of the measuring fixture according to the present utility model from another perspective in an embodiment;

[0021] Figure 5 The cross-sectional schematic diagram of the measuring fixture according to the present utility model from a perspective in an embodiment;

[0022] Figure 6 The cross-sectional schematic diagram of the measuring fixture according to the present utility model from a perspective when the lens barrel is not placed;

[0023] Figure 7 The structural explosion diagram of the measuring fixture according to the present utility model from a perspective after hiding some structures;

[0024] Figure 8 The structural explosion diagram of the measuring fixture according to the present utility model from another perspective after hiding some structures;

[0025] Figure 9 The cross-sectional schematic diagram of the measuring fixture according to the present utility model from a perspective after hiding some structures.

[0026] Label description:

[0027] 1. Upper plate; 11. First card slot; 12. Card block; 13. First groove; 14. First counterbore; 15. Second counterbore;

[0028] 2. Lower plate; 21. Second card slot; 22. Third card slot; 23. Second groove; 24. Positioning hole; 25. Screw hole;

[0029] 3. Bolt;

[0030] 4. Elastic member;

[0031] 5. Positioning post;

[0032] 6. Lens barrel. Specific embodiments

[0033] To describe in detail the technical content, achieved purpose and effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the drawings.

[0034] Please refer to Figures 3 to 9, the present utility model provides a measuring fixture, which includes a fixture plate assembly and an elastic mechanism. The fixture plate assembly includes an upper plate 1 and a lower plate 2. The upper plate 1 and the lower plate 2 are detachably connected through the elastic mechanism. A first card slot 11 is formed on the connecting surface of the upper plate 1, and a second card slot 21 corresponding to the first card slot 11 is formed on the connecting surface of the lower plate 2.

[0035] As can be seen from the above description, the beneficial effect of the present utility model is that the fixture plate assembly includes an upper plate 1 and a lower plate 2 detachably connected through an elastic mechanism. When measuring a double-headed lens barrel, first place the lens barrel 6 on the measuring station of the measuring fixture in the open state, and then through the elastic mechanism, the measuring fixture changes from the open state to the locked state, that is, the upper plate 1 and the lower plate 2 are locked.

[0036] During the process of locking the upper plate 1 and the lower plate 2, the first card slot 11 and the second card slot 21 approach each other. Correspondingly, the lens barrel 6 located therein will eventually be fixed; at this time, a three-dimensional measuring instrument can be used for measurement. The measuring fixture is vertically fixed on the corresponding plane (i.e., the vertical fixation as shown in Figure 5 ), and a side probe system is used for measurement (entering from the side to measure +X, -X). First, use the probe to measure surface A. After measuring surface A, the three-dimensional measuring instrument can automatically use the probe on the other side to measure surface B. In this measurement process, the double-headed lens barrel does not need to be disassembled again, that is, it does not need to be removed from the measuring fixture to measure the other side, so as to reduce the inaccuracy of measurement data caused by disassembly damage, improve the measurement accuracy and efficiency, and then improve the utilization rate of the machine and the warehousing rate of products. It should be noted that Figure 2 and Figure 5 the markings A and B in respectively refer to surface A and surface B of the lens barrel.

[0037] Furthermore, in the measuring fixture of the present utility model, the elastic mechanism includes a bolt 3 and an elastic member 4. The elastic member 4 is sleeved on the bolt 3.

[0038] As can be seen from the above description, the elastic mechanism is arranged in the fixture plate assembly. The elastic member 4 can be an elastic component such as a spring, which is not limited herein.

[0039] Furthermore, in the measuring fixture of the present utility model, a first groove 13 is formed on the connecting surface of the upper plate 1, and a second groove 23 is formed on the connecting surface of the lower plate 2. Among them, one end of the elastic member 4 abuts against the bottom of the first groove 13, and the other end abuts against the bottom of the second groove 23.

[0040] As described above, one end of the elastic member 4 abuts against the first groove 13 of the upper plate 1, and the other end of the elastic member 4 abuts against the second groove 23 of the lower plate 2. Before an external force is applied to make the measuring jig in a locked state, that is, when it is in an open state, the upper plate 1 and the lower plate 2 are naturally separated, which facilitates quickly placing the lens barrel between the first card slot 11 and the second card slot 21. After the lens barrel is placed, the lens barrel can move freely between the first card slot and the second card slot, and at this time the elastic member is in a natural state.

[0041] Further, in the measuring jig of the present utility model, one end of the bolt 3 is arranged in the upper plate 1, and the other end of the bolt 3 is movably arranged in the lower plate 2.

[0042] When actually applying this measuring jig, when it is necessary to fix the lens barrel, use a wrench to lock the above-mentioned bolt 3 (such as an internal hexagon screw), the elastic member 4 is compressed, and the lens barrel can be clamped by the first card slot 11 and the second card slot 21, so as to achieve fixation. It should be noted that the inner diameters of the first card slot 11 and the second card slot 21 are equal to the outer diameter of the lens barrel for clamping.

[0043] Further, in the measuring jig of the present utility model, it includes two elastic mechanisms, and the two elastic mechanisms are arranged side by side, and the receiving groove is located between the two elastic mechanisms.

[0044] As described above, setting multiple groups of elastic mechanisms facilitates improving the reliability and stability of the connection between the upper plate 1 and the lower plate 2.

[0045] Further, in the measuring jig of the present utility model, it further includes a positioning column 5, and the positioning column 5 is arranged in the jig plate assembly.

[0046] As described above, by setting the corresponding positioning column 5, the positioning column 5 connects the upper plate 1 and the lower plate 2, which can be used to improve the stability and accuracy of the connection between the upper plate 1 and the lower plate 2.

[0047] Further, in the measuring jig of the present utility model, a first counterbore 14 is formed on the upper plate 1, and a positioning hole 24 is formed on the lower plate 2. Wherein, one end of the positioning column 5 is arranged in the first counterbore 14, and the other end of the positioning column 5 is arranged in the positioning hole 24.

[0048] As described above, one end of the positioning column 5 is arranged in the first counterbore 14, and the other end is arranged in the positioning hole 24, so that the upper plate 1 and the lower plate 2 can be connected, realizing the positioning between the upper plate 1 and the lower plate 2, which is convenient for assembly and disassembly.

[0049] Further, in the measuring jig of the present utility model, the positioning column 5 is located between the two elastic mechanisms.

[0050] As described above, placing the positioning post 5 at the central position facilitates improving the accuracy of positioning between the upper plate 1 and the lower plate 2.

[0051] Furthermore, in the measuring fixture of the present utility model, a clamping block 12 is provided on the upper plate 1, and the lower plate 2 is provided with a third card slot 22 adapted to the clamping block 12. Further, in the measuring fixture of the present utility model, the first counterbore penetrates through the clamping block, and the positioning hole communicates with the third card slot.

[0052] As described above, during the process of locking the upper plate 1 and the lower plate 2, the upper plate and the lower plate can be quickly assembled and connected through the clamping block 12 and the third card slot 22, improving the accuracy and stability of the positioning connection between the two.

[0053] Please refer to Figures 3 to 9 , Embodiment 1 of the present utility model is: a measuring fixture, which is used to measure the inner diameter size of the barrel of a double-headed barrel. The above-mentioned measuring fixture includes a fixture plate assembly, an elastic mechanism, a positioning post 5 and other components. Among them, the elastic mechanism, the positioning post 5, etc. are all arranged in the fixture plate assembly. The following combines Figures 3 to 9 to specifically introduce the above components.

[0054] In this embodiment, as Figure 3 , Figure 7 and Figure 8 show, the fixture plate assembly includes an upper plate 1 and a lower plate 2 detachably connected through an elastic mechanism, a positioning post 5, etc. The upper plate 1 and the lower plate 2 are both similar in shape to a cuboid. The upper plate 1 and the lower plate 2 are arranged opposite to each other. Two semi-cylindrical first card slots 11 are provided on the connecting surface of the upper plate 1. Correspondingly, two semi-cylindrical second card slots 21 are provided on the connecting surface of the lower plate 2. The first card slots 11 and the second card slots 21 are arranged in one-to-one correspondence. In the locked state, the first card slots 11 and the second card slots 21 can enclose to form a receiving groove for receiving the barrel. In the open state, there is a certain distance between the first card slots 11 and the second card slots 21. In addition, a clamping block 12 is also correspondingly provided on the upper plate 1, and the lower plate 2 is provided with a third card slot 22 adapted to the clamping block 12. In the locked state, the clamping block 12 is correspondingly embedded in the third card slot 22.

[0055] In this embodiment, as Figure 6As shown in the figure, there are two sets of elastic mechanisms in the jig plate assembly. The two sets of elastic mechanisms are arranged on both sides of the jig plate assembly. The above elastic mechanism includes an Allen screw and a spring sleeved on the Allen screw. In order to lock and separate the upper plate 1 and the lower plate 2 through the above elastic mechanism, in this embodiment, two symmetrically arranged second counterbores 15 are provided in the upper plate 1. The two second counterbores 15 are used to accommodate the nut section of the Allen screw. In the lower plate 2, there are two screw holes 25 corresponding to the two second counterbores 15. The two screw holes 25 are used to accommodate the screw rod section of the Allen screw away from the nut. Correspondingly, in this embodiment, a first groove 13 is also provided on the connecting surface of the upper plate 1, and a second groove 23 corresponding to the first groove 13 is provided on the connecting surface of the lower plate 2. Among them, one end of the spring abuts against the bottom of the first groove 13, and the other end abuts against the bottom of the second groove 23. It should be noted that the first groove 13 is coaxially arranged with the counterbore and communicates with each other, and the second groove 23 is coaxially arranged with the screw hole 25 and communicates with each other.

[0056] In this embodiment, as Figure 6 shown, a positioning post 5 is also provided in the jig plate assembly. The positioning post 5 is located between the two elastic mechanisms. In order to be able to position and connect the upper plate 1 and the lower plate 2 through the positioning post 5, in this embodiment, a first counterbore 14 is provided on the upper plate 1. The first counterbore penetrates through the clamping block 12. A positioning hole 24 corresponding to the first counterbore 14 is provided on the lower plate 2. The positioning hole communicates with the third card slot. In addition, as Figure 7 shown, the first counterbore penetrates through the upper plate up and down, and the positioning hole also penetrates through the lower plate up and down. Among them, the first counterbore 14 is used to accommodate the large end section of the positioning post 5. The first counterbore 14 includes two parts, and the diameters of both parts are correspondingly slightly larger than the diameter of the positioning post 5 located therein. The positioning hole 24 is used to accommodate the small end section of the positioning post 5, and the diameter of the positioning hole 24 is larger than the diameter of the small end section of the positioning post 5.

[0057] In summary, the measuring fixture provided by the present utility model: (1) The springs and the hexagon socket head cap screws are symmetrically arranged on both sides of the fixture plate assembly, and the positioning posts are arranged in the middle of the fixture plate assembly. When measuring a double-ended lens barrel, first place the lens barrel on the open fixture, and use a hexagon wrench to lock the hexagon socket head cap screws on both sides of the fixture plate assembly, so that the two fixture plates (i.e., the upper plate and the lower plate) change from the open state to the locked state, and the double-ended lens barrel is thus fixed. When using a coordinate measuring machine for measurement, fix the measuring fixture on a plane, use a side probe system (enter from the side to measure +X, -X). After programming, use the probe to measure surface A. After measuring surface A, the coordinate measuring machine can automatically use the probe on the other side to measure surface B. The double-ended lens barrel does not need to be disassembled again, effectively improving the measurement speed and accuracy, as well as the utilization rate of the machine and the acceptance rate of the product. (2) The measuring fixture of the present utility model solves the difficulty of removing the double-ended lens barrel from the measuring fixture to measure the other side, improving the measurement accuracy.

[0058] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, shall be included in the patent protection scope of the present utility model by the same token.

Claims

1. A measuring fixture, characterized in that, It includes a jig plate assembly and an elastic mechanism. The jig plate assembly includes an upper plate and a lower plate. The upper plate is detachably connected to the lower plate through the elastic mechanism. A first card slot is formed on the connecting surface of the upper plate, and a second card slot corresponding to the first card slot is formed on the connecting surface of the lower plate.

2. The measuring fixture according to claim 1, wherein The elastic mechanism includes a bolt and an elastic member. The elastic member is sleeved on the bolt.

3. The measuring jig according to claim 2, wherein A first groove is formed on the connecting surface of the upper plate, and a second groove is formed on the connecting surface of the lower plate. Wherein, one end of the elastic member abuts against the bottom of the first groove, and the other end abuts against the bottom of the second groove.

4. The measuring fixture according to claim 2, wherein, One end of the bolt is arranged in the upper plate, and the other end of the bolt is movably arranged in the lower plate.

5. The measuring jig according to claim 2, characterized in that, It includes two elastic mechanisms, and the two elastic mechanisms are arranged side by side.

6. The measuring fixture according to claim 1, wherein It further includes positioning posts, and the positioning posts are arranged in the jig plate assembly.

7. The measuring jig according to claim 6, wherein The positioning posts are located between the two elastic mechanisms.

8. The measuring fixture according to claim 6, wherein A first counterbore is formed on the upper plate, and a positioning hole is formed on the lower plate. Wherein, one end of the positioning post is arranged in the first counterbore, and the other end of the positioning post is arranged in the positioning hole.

9. The measuring fixture according to claim 8, wherein, A clamping block is arranged on the upper plate, and a third card slot adapted to the clamping block is arranged on the lower plate.

10. The measuring jig according to claim 9, characterized in that, The first counterbore penetrates through the clamping block, and the positioning hole communicates with the third card slot.

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