Optical goniometer for measuring rotation angle precision of part arranged on cradle head

Abstract

The utility model provides an optical goniometer for measuring the rotation angle precision of an upper part on a cradle head. The optical goniometer comprises a platform base; the adjusting mechanism comprises a supporting base and an adjusting support, the supporting base is arranged on the platform base, and the adjusting support is rotationally arranged on the supporting base; the optical goniometer is arranged at one end, far away from the supporting base, of the adjusting bracket; the placement tool is arranged on the platform base, a straight prism is arranged in the placement tool, a through hole is formed in the placement tool, and the through hole is located over the straight prism; the holder support is movably arranged on the placement tool, a through hole corresponding to the through hole is formed in a bottom plate of the holder support, corresponding shaft holes are formed in two lug plates of the holder support, and reflection optical flats are movably installed in the through hole and the shaft holes. According to the invention, the rotation angle precision detection of the part can be rapidly and accurately completed, and the method has the advantages of high measurement efficiency and accuracy.

Description

Technical Field

[0001] This application belongs to the field of gimbal component inspection technology, and in particular relates to an optical angle measuring instrument for measuring the angular accuracy of gimbal-mounted components. Background Technology

[0002] Currently, angle measuring instruments on the market are mainly used in machine tool precision inspection, while they are rarely used in trial production of dual-axis gimbal equipment for inspecting workpieces. When measuring the perpendicularity between the characteristic axes of assembled parts, it is necessary to switch the position of the part being measured. When changing the angle of the part being measured, it is necessary to readjust the angle between the probe and the part being measured. This requires a long time for the inspectors, and the test accuracy is poor, resulting in large deviations in the measurement results. Utility Model Content

[0003] In view of this, this application aims to propose an optical angle measuring instrument for measuring the angular accuracy of gimbal-mounted parts, so as to solve the problem of difficulty in detecting gimbal-mounted parts.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0005] This application provides an optical angle measuring instrument for measuring the rotational accuracy of a gimbal-mounted component, comprising:

[0006] Platform base;

[0007] An adjustment mechanism, comprising a support base and an adjustment bracket, wherein the support base is disposed on the platform base and the adjustment bracket is rotatably disposed on the support base;

[0008] An optical goniometer, wherein the optical goniometer is disposed at the end of the adjusting bracket away from the supporting base;

[0009] A mounting fixture is provided, which is mounted on the platform base. A straight prism is provided inside the mounting fixture, and a through hole is provided on the mounting fixture, with the through hole located directly above the straight prism.

[0010] A gimbal bracket is movably mounted on the mounting fixture. The base plate of the gimbal bracket has a through hole corresponding to the through hole, and the two ear plates of the gimbal bracket have corresponding shaft holes. A reflective flat crystal is movably installed in the through hole and shaft hole.

[0011] Furthermore, the platform base includes a perforated base plate, with adjustable feet at the four corners of the bottom edge of the perforated base plate, and a bubble level assembly is also provided on the perforated base plate.

[0012] Furthermore, the support base is fixed to the porous base plate by fastening screws, and the upper end surface of the support base is reserved with an arc-shaped notch for the light emitted by the optical goniometer to pass through.

[0013] Furthermore, the adjustment bracket includes a bracket main board, one end of which is connected to the support base via a clamping handle. The bracket main board has an adjustment slot, and a connector is provided in the adjustment slot. The connector is fastened in the adjustment slot, and the optical angle measuring instrument is installed at the end of the connector away from the clamping handle.

[0014] Furthermore, the connecting component includes a screw sleeve, a fixed bushing, a fixed nut, a fixed screw, and a bushing clamp. The screw sleeve is fitted onto the fixed bushing, and one end of the screw sleeve away from the fixed bushing passes through the adjusting slot and is threadedly connected to the fixed nut. The fixed screw passes through the fixed nut and the screw sleeve and is threadedly connected to the fixed bushing.

[0015] The bushing clamp is connected to the fixed bushing by fastening screws, and the two form a through mounting position, in which the optical goniometer is correspondingly installed.

[0016] Furthermore, the mounting fixture includes a base plate, support rods, and a top plate. The top plate is mounted on the base plate via multiple support rods. Fastening screws pass through the top plate, support rods, and base plate and are fixedly connected to the perforated bottom plate. The straight prism is mounted on the base plate, and the through hole is formed on the top plate.

[0017] The top plate is provided with a plurality of positioning pins, which are arranged circumferentially around the through hole and are used to position the gimbal bracket.

[0018] Furthermore, the optical goniometer is assembled from a main shaft sleeve, an objective lens module, a dividing plate module, an eyepiece module, and a lens module;

[0019] The objective lens module is mounted at the bottom of the main shaft sleeve, the dividing plate module is mounted at the top of the main shaft sleeve, the eyepiece module is mounted on the dividing plate module via a lens barrel mount, and the lens module is fixedly connected to the eyepiece module.

[0020] Furthermore, the differentiation plate module consists of an outer sleeve base, a graduated lens, a lens holder, a holder cover plate, and a light source;

[0021] The outer sleeve base is assembled and connected to the end of the main sleeve away from the objective lens module. The lens holder is snapped into the top of the outer sleeve base. The lens holder has an insertion groove inside. The scale lens is placed in the insertion groove and its position is fixed by the scale lens frame and the first spring pad provided on the inner walls of both sides of the insertion groove.

[0022] The bracket cover plate has a cutout and is fixed to the lens bracket by fastening screws;

[0023] The light source consists of a lampshade and LED beads disposed inside the lampshade. The LED beads are disposed corresponding to the scale lens. The lampshade is disposed on the outer wall of the outer sleeve base by a fixing screw.

[0024] Furthermore, the lens barrel base is mounted on the outer sleeve base by fastening screws, and a recess is reserved in the lens barrel base, in which a second spring pad is placed to limit the position of the lens holder.

[0025] Furthermore, the lens barrel base is threadedly connected to the eyepiece module.

[0026] Compared with the prior art, the optical goniometer for measuring the rotational accuracy of gimbal-mounted parts described in this application has the following advantages:

[0027] The optical angle measuring instrument for measuring the rotational accuracy of parts mounted on a gimbal described in this application can quickly and accurately complete the rotational accuracy detection of parts, requiring less time for the inspectors. This device has the advantages of high measurement efficiency and high accuracy. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of an optical goniometer for measuring the rotational accuracy of a gimbal-mounted component, as described in an embodiment of this application.

[0030] Figure 2 This is a schematic diagram of the connector structure described in the embodiments of this application;

[0031] Figure 3 This is a schematic diagram of the installation tooling structure described in the embodiments of this application;

[0032] Figure 4 This is a schematic diagram of the overall structure of the optical goniometer described in the embodiments of this application;

[0033] Figure 5 This is a schematic diagram of the differentiation plate module structure described in the embodiments of this application;

[0034] Figure 6 This is a schematic diagram of the lens holder structure described in an embodiment of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Platform base; 11-Perforated base plate; 12-Adjustable feet; 13-Bubble level assembly; 2-Adjustment mechanism; 21-Support base; 22-Main support plate; 23-Clamping handle; 24-Adjustment slot; 25-Screw sleeve; 26-Fixing bushing; 27-Fixing nut; 28-Fixing screw; 29-Bushing clamp; 3-Setting fixture; 31-Base plate; 32-Support rod; 33-Top plate; 34-Through hole; 35-Positioning pin; 4-Gimbal bracket; 5 - Optical goniometer; 51- Main spindle sleeve; 52- Objective lens module; 53- Dividing plate module; 531- Outer tube base; 532- Scale lens; 533- Lens support; 534- Support cover plate; 535- Lens tube base; 536- Scale lens frame; 537- First spring washer; 538- Lamp cover; 539- Lamp bead; 5310- Fixing screw; 5311- Second spring washer; 54- Eyepiece module; 55- Lens module; 6- Straight prism; 7- Display screen. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0038] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can refer to any connection.

[0039] This includes electrical connections, whether direct or indirect. Terms like "up," "down," "left," and "right" are used only to indicate relative positional relationships; these relative relationships may change if the absolute position of the object being described changes.

[0040] Please see Figures 1 to 4 As shown, this embodiment provides an optical goniometer for measuring the angular accuracy of a gimbal-mounted component, including:

[0041] Platform base 1;

[0042] Adjustment mechanism 2 includes a support base 21 and an adjustment bracket. The support base 21 is mounted on the platform base 1, and the adjustment bracket is rotatably mounted on the support base 21.

[0043] Optical goniometer 5 is located at the end of the adjustment bracket away from the support base 21;

[0044] The fixture 3 is set on the platform base 1. The fixture 3 contains a straight prism 6. The fixture 3 has a through hole 34, which is located directly above the straight prism 6.

[0045] The gimbal bracket 4 is movably mounted on the mounting fixture 3. The base plate of the gimbal bracket 4 has a through hole corresponding to the through hole 34, and the two ear plates of the gimbal bracket 4 have corresponding shaft holes. A reflective flat crystal is movably installed in the through hole and shaft hole.

[0046] Specifically, in this embodiment, the adjustment mechanism 2 and the mounting fixture 3 are installed on the platform base 1, and the gimbal bracket 4 to be measured is placed on the mounting fixture 3. By adjusting the rotation angle of the adjustment bracket, the operator can adjust the position of the optical angle measuring instrument 5 and complete the measurement of the rotation accuracy of the gimbal bracket 4 placed on the mounting fixture 3, so as to verify the overall performance of the core component of the gimbal after parts processing.

[0047] Furthermore, the verification elements include two points: first, the through hole opened on the gimbal bracket 4, verifying whether the through hole is the rotation center of the workpiece, and whether the overall workpiece jumps after rotation; second, verifying whether the centers of the shaft holes opened on the two ear plates of the gimbal bracket 4 are parallel.

[0048] When measuring the perpendicularity of the feature axis after the part is assembled, place the part to be measured (i.e., the gimbal bracket 4) on the mounting fixture 3, and attach the reflective flat crystal (i.e., the reflective lens, which is not shown in the attached figure) to the through hole. Adjust the position of the optical angle measuring instrument 5, and the instrument will display the test value. Set the instrument data to zero, and then adjust the rotation angle of the rotating workpiece on the mounting fixture 3. You can observe the crosshairs on the test instrument screen to draw a circle (if the part is very good, rotate the workpiece and the crosshairs will not move in place). The position with the largest eccentricity is the eccentricity value of this workpiece.

[0049] When measuring the coaxiality of the two holes of a part, a reflective flat crystal is installed in one of the holes of the part to be tested. After the test, the instrument data is zeroed, and then the reflective flat crystal is placed in the other hole for testing. The test value obtained is the eccentricity difference between the two holes, which verifies whether the two holes maintain coaxiality.

[0050] The optical angle measuring instrument 5 for measuring the corner accuracy of parts mounted on a gimbal in this application can quickly and accurately complete the corner accuracy detection of parts, and the detection time is short. This device has the advantages of high measurement efficiency and high accuracy.

[0051] In some implementations, such as Figure 1 As shown, the platform base 1 includes a perforated base plate 11, with adjustable feet 12 at the four corners of the bottom of the perforated base plate 11, and a bubble level assembly 13 on the perforated base plate 11. In this embodiment, the perforated base plate 11 is used as the platform base 1, which allows for flexible assembly and disassembly of the various structural components. The adjustable feet 12 and the bubble level assembly 13 are used to adjust and check the levelness of the entire platform.

[0052] The porous base plate 11 is also equipped with a display screen 7 connected to the optical goniometer 5. The display screen 7 is used to display the angle measurement data.

[0053] The support base 21 is fixed to the perforated base plate 11 by fastening screws, and the upper end surface of the support base 21 is reserved with an arc-shaped notch for the light emitted by the optical goniometer 5 to pass through. The purpose of setting the arc-shaped notch is that when the optical goniometer 5 is placed horizontally, the upper end surface of the support base 21 affects the light illumination of the optical goniometer 5.

[0054] In some implementations, such as Figure 1 and Figure 2 As shown, the adjustment bracket includes a bracket main board 22. One end of the bracket main board 22 is connected to the support base 21 via a clamping handle 23. An adjustment slot 24 is provided on the bracket main board 22. A connector is provided in the adjustment slot 24. The connector is fastened in the adjustment slot 24. The optical angle measuring instrument 5 is installed at the end of the connector away from the clamping handle 23.

[0055] The connector includes a screw sleeve 25, a fixed bushing 26, a fixed nut 27, a fixed screw 28, and a bushing clip 29. The screw sleeve 25 is fitted onto the fixed bushing 26. One end of the screw sleeve 25 away from the fixed bushing 26 passes through the adjusting slot 24 and is threadedly connected to the fixed nut 27. The fixed screw 28 passes through the fixed nut 27 and the screw sleeve 25 and is threadedly connected to the fixed bushing 26.

[0056] The bushing clamp 29 is connected to the fixed bushing 26 by fastening screws, and the two form a through mounting position, in which the optical goniometer 5 is correspondingly installed.

[0057] Specifically, in this embodiment, by rotating the clamping handle 23, the position between the adjustment bracket and the support base 21 can be fixed and loosened, which is simple and easy to operate;

[0058] By adjusting the fixing nut 27, the position of the entire connector and the adjusting bracket can be fixed and loosened. In this embodiment, the position of the optical goniometer 5 is fixed by fastening the bushing clamp 29 and the fixing bushing 26 with the fastening screw, thereby fixing the optical goniometer 5 in the mounting position formed between the two.

[0059] By adjusting the rotation angle of the adjustment bracket, the rotation angle and position of the entire adjustment bracket are fixed, which is convenient, time-saving and labor-saving, and achieves better position adjustment of the optical goniometer 5.

[0060] In some implementations, such as Figure 3 As shown, the mounting fixture 3 includes a base plate 31, a support rod 32 and a top plate 33. The top plate 33 is mounted on the base plate 31 by multiple support rods 32. Fastening screws pass through the top plate 33, the support rods 32, the base plate 31 and are fixedly connected to the perforated bottom plate 11. A straight prism 6 is mounted on the base plate 31 and a through hole 34 is opened on the top plate 33.

[0061] Multiple positioning pins 35 are movably provided on the top plate 33. The multiple positioning pins 35 are arranged circumferentially around the through hole 34. The positioning pins 35 are used to position the gimbal bracket 4.

[0062] Specifically, in this embodiment, a gap is formed between the substrate 31 and the top plate 33, and a straight prism 6 is placed in the gap. In conjunction with a reflective flat crystal installed in the through hole, the verticality of the through hole of the gimbal bracket 4 is measured by using an optical measuring instrument and the light measurement of the straight prism 6 and the reflective flat crystal.

[0063] The top plate 33 of the gimbal bracket 4 has several assembly holes (i.e. threaded holes), and the top plate 33 has positioning pins 35 corresponding to the assembly holes (it should be noted that the bottom of the positioning pin 35 in this embodiment has a threaded post, which is threadedly connected to the threaded hole on the top plate 33 to facilitate the flexible disassembly of the positioning pin 35). The gimbal bracket 4 is inserted into the positioning pin 35.

[0064] When it is necessary to adjust the rotation angle of the gimbal bracket 4, simply place the gimbal bracket 4 according to the setting position of the positioning pin 35, or adjust the position of the positioning pin 35 according to the position of the through hole 34 opened on the gimbal bracket 4 to meet different placement requirements.

[0065] In some implementations, such as Figure 4 As shown, the optical goniometer 5 is assembled from a main shaft sleeve 51, an objective lens module 52 (which includes a lens barrel sleeve, a lens barrel head, a positioning ring, and an objective lens; the assembly structure of the objective lens module 52 adopts the existing structure, which will not be described in detail here), a dividing plate module 53, an eyepiece module 54, and a lens module 55.

[0066] The objective lens module 52 is installed at the bottom of the main shaft sleeve 51, the dividing plate module 53 is installed at the top of the main shaft sleeve 51, the eyepiece module 54 is installed on the dividing plate module 53 through the lens barrel base 535, and the lens module 55 is fixedly connected to the eyepiece module 54.

[0067] like Figure 5 As shown, the differentiation plate module 53 consists of an outer sleeve base 531, a scale lens 532, a lens bracket 533, a bracket cover plate 534, and a light source;

[0068] The outer sleeve base 531 is assembled and connected to the end of the main sleeve 51 away from the objective lens module 52. The lens holder 533 is engaged with the top of the outer sleeve base 531. The lens holder 533 has an insertion groove inside. The scale lens 532 is placed in the insertion groove and its position is fixed by the scale frame 536 and the first spring pad 537 provided on the inner walls of both sides of the insertion groove. The scale frame 536 can limit the position of one side of the scale lens 532. The first spring pad 537 provided on the other side can be used for scale lenses 532 of different sizes, thus completing the installation of the scale lens 532 into the insertion groove.

[0069] The bracket cover plate 534 has a cutout and is fixed to the lens bracket 533 by fastening screws;

[0070] The light source consists of a lampshade 538 and an LED 539 disposed inside the lampshade 538. The LED 539 is disposed corresponding to the scale lens 532. The lampshade 538 is disposed on the outer wall of the outer sleeve base 531 by a fixing screw 5310.

[0071] like Figure 6 As shown, the lens barrel base 535 is mounted on the outer sleeve base 531 by fastening screws, and a notch is reserved in the lens barrel base 535, in which a second spring pad 5311 is placed to limit the position of the lens holder 533.

[0072] The lens barrel base 535 is threadedly connected to the eyepiece module 54.

[0073] Specifically, in this embodiment, the light emitted by the light source is reflected onto the reflective flat crystal after passing through the scale lens 532 and the objective lens. After passing through the differentiation plate located at the focal plane of the objective lens, the light is parallelized by the objective lens. The parallel light is reflected back by the reflective flat crystal perpendicular to the optical axis, and then passes through the objective lens to form an image of the differentiation plate marking line on the focal plane, which coincides with the marking line. When the reflective flat crystal is tilted by a small angle α, the reflected light beam is tilted by an angle 2α. Based on the above data, the small tilt angle of the reflective flat crystal relative to the plane perpendicular to the optical axis can be measured.

[0074] It should be noted that this embodiment only designs the structure of the optical goniometer 5. The working principle of the goniometer is the same as that of the existing optical goniometer 5. The optical goniometer 5 described in this embodiment is assembled from modules such as the main shaft sleeve 51, the objective lens module 52, and the reticle module. The components can be flexibly disassembled, and the overall structure is small in size, making it suitable for laboratory use to measure the angles of various parts.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0076] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. An optical goniometer for measuring the angular accuracy of a gimbal-mounted component, characterized in that, include: Platform base; An adjustment mechanism, comprising a support base and an adjustment bracket, wherein the support base is disposed on the platform base and the adjustment bracket is rotatably disposed on the support base; An optical goniometer, wherein the optical goniometer is disposed at the end of the adjusting bracket away from the supporting base; A mounting fixture is provided, which is mounted on the platform base. A straight prism is provided inside the mounting fixture, and a through hole is provided on the mounting fixture, with the through hole located directly above the straight prism. A gimbal bracket is movably mounted on the mounting fixture. The base plate of the gimbal bracket has a through hole corresponding to the through hole, and the two ear plates of the gimbal bracket have corresponding shaft holes. A reflective flat crystal is movably installed in the through hole and shaft hole.

2. The optical goniometer for measuring the rotational accuracy of a gimbal-mounted component according to claim 1, characterized in that: The platform base includes a perforated base plate, with adjustable feet at the four corners of the bottom edge of the perforated base plate, and a bubble level assembly is also provided on the perforated base plate.

3. The optical goniometer for measuring the rotational accuracy of a gimbal-mounted part according to claim 2, characterized in that: The support base is fixed to the porous base plate by fastening screws, and the upper end surface of the support base is reserved with an arc-shaped notch for the light emitted by the optical goniometer to pass through.

4. The optical goniometer for measuring the rotational accuracy of a gimbal-mounted component according to claim 1, characterized in that: The adjustment bracket includes a bracket main board, one end of which is connected to the support base via a clamping handle. An adjustment slot is provided on the bracket main board, and a connector is provided in the adjustment slot. The connector is fastened in the adjustment slot, and the optical angle measuring instrument is installed at the end of the connector away from the clamping handle.

5. The optical goniometer for measuring the rotational accuracy of a gimbal-mounted part according to claim 4, characterized in that: The connector includes a screw sleeve, a fixed bushing, a fixed nut, a fixed screw, and a bushing clamp. The screw sleeve is fitted onto the fixed bushing, and one end of the screw sleeve away from the fixed bushing passes through the adjusting slot and is threadedly connected to the fixed nut. The fixed screw passes through the fixed nut and the screw sleeve and is threadedly connected to the fixed bushing. The bushing clamp is connected to the fixed bushing by fastening screws, and the two form a through mounting position, in which the optical goniometer is correspondingly installed.

6. The optical goniometer for measuring the angular accuracy of a gimbal-mounted part according to claim 2, characterized in that: The mounting fixture includes a base plate, support rods, and a top plate. The top plate is mounted on the base plate via multiple support rods. Fastening screws pass through the top plate, support rods, and base plate and are fixedly connected to the perforated bottom plate. The straight prism is mounted on the base plate, and the through hole is formed on the top plate. The top plate is provided with a plurality of positioning pins, which are arranged circumferentially around the through hole and are used to position the gimbal bracket.

7. The optical goniometer for measuring the angular accuracy of a gimbal-mounted component according to claim 1, characterized in that: The optical goniometer is assembled from a main shaft sleeve, an objective lens module, a dividing plate module, an eyepiece module, and a lens module. The objective lens module is mounted at the bottom of the main shaft sleeve, the dividing plate module is mounted at the top of the main shaft sleeve, the eyepiece module is mounted on the dividing plate module via a lens barrel mount, and the lens module is fixedly connected to the eyepiece module.

8. The optical goniometer for measuring the angular accuracy of a gimbal-mounted part according to claim 7, characterized in that: The differentiation plate module consists of an outer sleeve base, a graduated lens, a lens holder, a holder cover plate, and a light source. The outer sleeve base is assembled and connected to the end of the main sleeve away from the objective lens module. The lens holder is snapped into the top of the outer sleeve base. The lens holder has an insertion groove inside. The scale lens is placed in the insertion groove and its position is fixed by the scale lens frame and the first spring pad provided on the inner walls of both sides of the insertion groove. The bracket cover plate has a cutout and is fixed to the lens bracket by fastening screws; The light source consists of a lampshade and LED beads disposed inside the lampshade. The LED beads are disposed corresponding to the scale lens. The lampshade is disposed on the outer wall of the outer sleeve base by a fixing screw.

9. The optical goniometer for measuring the angular accuracy of a gimbal-mounted part according to claim 8, characterized in that: The lens barrel base is mounted on the outer sleeve base by fastening screws, and a recess is reserved in the lens barrel base, in which a second spring pad is placed to limit the position of the lens holder.

10. The optical goniometer for measuring the rotational accuracy of a gimbal-mounted component according to claim 7, characterized in that: The lens barrel mount is threadedly connected to the eyepiece module.

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