Grating precision tester

Abstract

The utility model provides a grating precision tester, comprising: a frame main body, the top of which is provided with a light source; the first driving assembly is arranged on the frame main body; the first driving assembly is connected with a grating, and the grating is located above the light source; the light-transmitting cover is detachably connected with the top of the frame body to form a cavity, and the light source and the grating are located in the cavity; the test component is connected with the light-transmitting cover in the cavity and is positioned above the grating; the light shield covers the light-transmitting cover; the light shield can move along the height direction of the frame main body relative to the light-transmitting cover; by applying the light shield in the tester, ambient light can be shielded in a strong light environment, interference of environmental factors is reduced, the purity and stability of test light are guaranteed, and thus the measurement precision of the grating is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grating testing, and particularly relates to a grating precision tester. BACKGROUND

[0002] The grating precision tester is widely applied to high-precision measurement scenes such as mechanical processing, precise positioning and scientific experiments. However, in the actual application process, the tester is sensitive to ambient light. When in a strong light environment, the strong ambient light will obviously interfere with the light source and the testing assembly, thereby affecting the measurement precision of the tester on the grating. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application aims to provide a grating precision tester to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the present application provides a grating precision tester, which comprises:

[0005] a frame body, a light source arranged on the top of the frame body;

[0006] a first driving assembly arranged on the frame body, the first driving assembly being connected with a grating, and the grating being located above the light source;

[0007] a light-transmitting cover, which is detachably connected with the top of the frame body and forms a cavity, the light source and the grating being located in the cavity;

[0008] a testing assembly, which is connected with the light-transmitting cover in the cavity and is located above the grating;

[0009] a light-shielding cover, which covers at least part of the light-transmitting cover and is movable relative to the light-transmitting cover along the height direction of the frame body.

[0010] As can be seen from the above, the grating precision tester provided by the present application can provide a good testing environment for the grating, and has a corresponding dustproof effect. The light-shielding cover applied in the tester covers at least part of the light-transmitting cover and is slidably arranged relative to the light-transmitting cover. The light-shielding cover can shield ambient light in a strong light environment, reduce the interference of environmental factors, ensure the purity and stability of the testing light, and thus improve the measurement precision of the grating. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0012] Figure 1 It is a schematic diagram of the grating precision tester in the first state in the embodiment of the application.

[0013] Figure 2 It is a schematic diagram of the grating precision tester in the second state in the embodiment of the application.

[0014] Figure 3 It is a schematic diagram of the grating precision tester in the first view angle in the embodiment of the application.

[0015] Figure 4 It is a schematic diagram of the grating precision tester in the second view angle in the embodiment of the application.

[0016] Figure 5 It is a schematic diagram of the connection between the light shield and the shaft sleeve in the embodiment of the application.

[0017] Explanation of reference signs:

[0018] 100, frame body; 101, light source;

[0019] 200, first driving assembly; 210, first motor; 220, first driving rod; 221, first bearing seat;

[0020] 300, grating;

[0021] 400, light-transmitting cover; 401, cavity;

[0022] 500, testing assembly; 510, counter; 520, sensor;

[0023] 600, light shield;

[0024] 700, second driving assembly; 710, second motor; 720, second driving rod; 721, second bearing seat; 730, shaft sleeve; 731, connecting block; 740, protective cover; 741, limiting groove. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the application more clear, the application will be further described in detail below with reference to specific embodiments and drawings.

[0026] For ease of description, unless otherwise defined, technical terms or scientific terms used in the embodiments of the present application shall have the ordinary meaning understood by one of ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms used in the embodiments of the present application do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" and "connected" and similar terms do not mean only physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0027] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0028] The grating precision tester is mainly used for detecting gratings or components with gratings. The working principle is that the grating to be tested is installed in the tester, the tester provides test light and drives the grating to rotate, and the grating is measured by using a sensor and a counter and other test components, so as to accurately obtain the related parameters of the grating. However, in actual application, the test components of the tester are relatively sensitive to light. When in a strong light environment, the strong ambient light will interfere with the test light emitted by the internal light source of the tester, and will also affect the measurement effect of the test components on the test light, resulting in a certain deviation in the obtained measurement data.

[0029] Therefore, in some embodiments, the grating precision tester can be fixedly connected with a light shield cover, which can be covered outside the grating, the light source, and the test components, so as to reduce the interference caused by the strong ambient light. However, according to the above-mentioned manner of adding a light shield cover, although the adaptability of the tester to the strong light environment can be enhanced, part of the test scene needs to be tested in a normal light environment. If the installation flexibility between the light shield cover and the tester is relatively poor, the disassembly between the tester and the light shield cover will be relatively difficult, so that different light environments cannot be met.

[0030] In view of this, the present application provides a grating 300 precision tester, which combines Figures 1-5 The grating 300 precision tester is described in detail.

[0031] A grating 300 precision tester, comprising a frame body 100, a first driving assembly 200, a light-transmitting cover 400, a testing assembly 500 and a light-blocking cover 600; the frame body 100 is provided with a light source 101 at the top; the first driving assembly 200 is arranged on the frame body 100; the first driving assembly 200 is connected with a grating 300, and the grating 300 is located above the light source 101; the light-transmitting cover 400 is detachably connected with the top of the frame body 100 and forms a cavity 401, and the light source 101 and the grating 300 are located in the cavity 401; the testing assembly 500 is connected with the light-transmitting cover 400 in the cavity 401; and the testing assembly 500 is located above the grating 300; the light-blocking cover 600 covers at least part of the light-transmitting cover 400; and the light-blocking cover 600 is movable relative to the light-transmitting cover 400 along the height direction of the frame body 100.

[0032] Specifically, as shown in Figures 1-5 , the frame body 100 can be used as a bearing body of the tester to support the first driving assembly 200, the light-transmitting cover 400 and the light-blocking cover 600 and provide appropriate mounting positions for the three; the light source 101 arranged at the top of the frame body 100 can provide test light to the grating 300 after being powered on during the test.

[0033] Specifically, as shown in Figure 3 and Figure 4 , the first driving assembly 200 is mounted on the frame body 100 and connected with the grating 300 to support the grating 300; during the test, the first driving assembly 200 can also provide driving force for the grating 300 to drive the grating 300 to rotate; since the grating 300 is located above the light source 101, the test light provided by the light source 101 can irradiate the surface of the grating 300, and the grating 300 is measured by using the optical phenomena of the test light and the transmission of the test light.

[0034] Specifically, as shown in Figure 3 and Figure 4 , the light-transmitting cover 400 is arranged at the top of the frame body 100 and forms a cavity 401; since the grating 300 and the testing assembly are located in the cavity 401, the light-transmitting cover 400 can protect the grating 300 and the testing assembly 500 inside, reducing the interference of external environmental factors on the test process; in addition, since the light-transmitting cover 400 is detachably connected with the top of the frame body 100, the light source 101 and the testing assembly 500 inside the cavity 401 can be repaired and replaced by disassembling the light-transmitting cover 400.

[0035] Specifically, in order to ensure the accuracy of the test results, the light intensity in the external environment is required to be high. For example, when the external environment is a strong light environment, the strong ambient light may interfere with the light source 101 and the test assembly 500. At this time, by moving the light shield 600 along the height direction of the frame body 100, the light shield 600 can gradually approach the frame body 100 and cover the light-transmitting cover 400, so as to isolate the external strong ambient light by using the light shield 600, thereby preventing the strong light environment from interfering with the test results.

[0036] More specifically, some tests need to simulate real application scenarios and need to be tested in normal light environment, so the ambient light does not need to be shielded. For example, by moving the light shield 600 along the height direction of the frame body 100, the light shield 600 can gradually move away from the frame body 100 and the light-transmitting cover 400 can gradually be exposed, and the light-transmitting cover 400 will not shield and interfere with the ambient light, thereby meeting the corresponding test requirements.

[0037] Further, there is a gap between the light shield 600 and the light-transmitting cover 400, which can avoid leaving scratches on the surface of the light-transmitting cover 400 when the light shield 600 and the light-transmitting cover 400 slide relative to each other.

[0038] Further, the structure of the light shield 600 can be adapted to the structure of the light-transmitting cover 400, so that the light shield 600 and the light-transmitting cover 400 are connected by sliding, which can improve the stability of the movement of the light shield 600.

[0039] In some embodiments, the first driving assembly 200 includes a first motor 210 and a first driving rod 220. The first motor 210 is fixedly connected to the side wall of the frame body 100 inside the frame body 100. The first driving rod 220 extends along the height direction of the frame body 100, and one end of the first driving rod 220 is connected to the output shaft of the first motor 210, and the other end is detachably connected to the grating 300.

[0040] Specifically, as shown in Figure 3 and Figure 4 , the first driving assembly 200 is used to support the grating 300 during the test process, and the grating 300 is driven to rotate during the test process. The first motor 210 is fixedly connected to the side wall of the frame body 100 inside the frame body 100, and the frame body 100 provides a mounting position for the first motor 210 and protects it. One end of the first driving rod 220 is connected to the output shaft of the first motor 210, which can transmit power to the first driving rod 220, and the other end is detachably connected to the grating 300, which can be used to support the grating 300 and drive the grating 300 to rotate synchronously.

[0041] In some embodiments, the frame body 100 is provided with a first bearing seat 221, which is connected with the first driving rod 220.

[0042] Specifically, as shown in Figure 3 and Figure 5 , by applying the first bearing seat 221 to the frame body 100 and connecting the first bearing seat 221 with the first driving rod 220, the first driving rod 220 can be positioned and installed on the frame body 100, ensuring stable rotation of the first driving rod 220 on the frame body 100, and also reducing the degree of wear of the first driving rod 220.

[0043] In some embodiments, the grating 300 precision tester further comprises a second driving assembly 700, which is arranged on the frame body 100 and connected with the light shield 600, to drive the light shield 600 to move along the height direction of the frame body 100. Specifically, as shown in Figures 3-5 , the second driving assembly 700 can provide driving force to the light shield 600 to drive the light shield 600 to move along the height direction of the frame body 100, so that the light shield 600 can shield the light transmission cover 400 in a strong light environment, or expose the light transmission cover 400 in a normal light environment, so that it can adapt to the test requirements of the grating 300, improve the flexibility of the light shield 600 adjustment, and also reduce the adjustment difficulty of the light shield 600.

[0044] Further, the second driving assembly 700 comprises a second motor 710, a second driving rod 720 and a shaft sleeve 730; the second motor 710 is fixedly connected with the side wall of the frame body 100 in the frame body 100; the bottom end of the second driving rod 720 is connected with the output shaft of the second motor 710; the shaft sleeve 730 is fixedly connected with the light shield 600 through a connecting block 731 and is in transmission connection with the second driving rod 720 through threads.

[0045] Specifically, as shown in Figures 3-5As shown, the second driving assembly 700 can be used to drive the light shield 600 to move in the height direction of the frame body 100, so as to adjust the light shielding effect of the light shield 600 on the light transmission cover 400. More specifically, the frame body 100 provides a mounting position for the second electrode, and when the light shield 600 is driven to move by the second driving assembly 700, the driving force is provided by the second motor 710, the second driving rod 720 connected to the second motor 710 is driven to rotate synchronously by the output shaft of the second motor 710, and since the second driving rod 720 is connected with the shaft sleeve 730 through threads, and the shaft sleeve 730 is fixedly connected with the light shield 600 through the connecting block 731, as the second driving rod 720 continuously rotates, the shaft sleeve 730 can be driven to move along the extension direction of the second driving rod 720, i.e. to move in the height direction of the frame body 100, by thread transmission, and the light shield 600 is driven to move synchronously by the connecting block 731, so as to adjust the position of the light shield 600.

[0046] In some embodiments, the second driving assembly 700 further comprises a protective cover 740, which is arranged on the top of the frame body 100 and covers part of the second driving rod 720; the protective cover 740 is connected with the top end of the second driving rod 720; the protective cover 740 is provided with a limiting groove 741 in the height direction of the frame body 100, and the connecting block 731 is slidingly arranged in the limiting groove 741.

[0047] As shown in Figure 1 , Figure 2 and Figure 5 , the protective cover 740 arranged on the top of the frame body 100 can shield part of the second driving rod 720, so as to avoid dust in the external environment from accumulating at the threads of the second driving rod 720 and affecting the transmission effect between the second driving rod 720 and the shaft sleeve 730.

[0048] More specifically, when the shaft sleeve 730 moves to the end of the second driving rod 720 away from the frame body 100, since the protective cover 740 is connected with the top end of the second driving rod 720, the top end of the protective cover 740 can limit the shaft sleeve 730 to prevent the shaft sleeve 730 from falling off the top of the second driving rod 720.

[0049] More specifically, since the second driving assembly 700 is used to drive the light shield 600 to move in the height direction of the frame body 100, by providing the limiting groove 741 in the protective cover 740 in the height direction of the frame body 100, the movement track of the connecting block 731 can be further limited, so as to improve the stability of the protective cover 740 during movement.

[0050] In some embodiments, the second driving assembly 700 is provided with at least two groups; as Figures 1-4As shown, by applying at least two second driving assemblies 700 in the tester, greater driving force can be provided, and the stability of the movement of the light shield 600 can be improved.

[0051] For example, two second driving assemblies 700 can be applied in the tester, and the two driving assemblies can be symmetrically arranged relative to the light shield 600. In this way, the light shield 600 can be subjected to relatively uniform driving force, and problems such as deviation or jamming of the light shield 600 during movement can be avoided.

[0052] In some embodiments, the frame body 100 is provided with a second bearing seat 721, which is connected with the second driving rod 720.

[0053] By applying the second bearing seat 721 to the frame body 100 and connecting the second bearing seat 721 with the second driving rod 720, the second driving rod 720 can be positioned and installed on the frame body 100, so that the stable rotation of the second driving rod 720 on the frame body 100 can be ensured, and the wear degree of the second driving rod 720 can be reduced.

[0054] In some embodiments, the test assembly 500 includes a counter 510 and a sensor 520. The counter 510 is connected with the light-transmitting cover 400 in the cavity 401 and located above the grating 300. The sensor 520 is connected with the counter 510 on the side close to the frame body 100 and located above the grating 300.

[0055] Specifically, as shown in Figure 3 and Figure 4 The test assembly 500 can include at least the counter 510 and the sensor 520 located on the top of the grating 300, so as to receive and detect the test light passing through the grating 300. The sensor 520 can be an optical sensor 520, and the two are electrically connected. When the test light provided by the light source 101 passes through the grating 300 and is emitted, the test light emitted by the grating 300 is received and detected by the sensor 520, and the number of gratings 300 of the grating 300 can be measured by the counter 510.

[0056] In some embodiments, for the light-transmitting cover 400, the light-transmitting cover 400 can be made of acrylic material, so as to have good light-transmitting property and relatively low cost. For the light shield 600, the light shield 600 can be made of engineering plastic, so as to have low cost and be easy to form. Meanwhile, the outer surface of the light shield 600 can be coated with a material having strong light-shielding or light-absorbing ability, so as to improve the light-shielding effect of the light shield 600.

[0057] It is to be understood that the foregoing description is exemplary of the application only and is intended to provide an overview for the understanding of the present application and is not intended to limit the application to the specific form described. From the above description, one skilled in the art can easily ascertain the manner of using the application, the method of operation and the combination of parts and steps to implement the application. Since many modifications, variations, alterations, and adaptations of the application will become apparent to those skilled in the art in the light of the foregoing description, it is to be understood that this application is not limited by the foregoing description, but instead has as its scope the full scope of the appended claims.

[0058] The various embodiments in the present application are described in progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be mutually referred to.

[0059] The description in the present application is given for the purpose of exemplification and description, and is not exhaustive or limits the present application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles and practical application of the present application, and to enable those of ordinary skill in the art to understand the present application in order to design various embodiments with various modifications for specific use.

[0060] Those of ordinary skill in the art should understand that the discussion of any embodiment is merely exemplary and is not intended to suggest that the scope of the present application (including the claims) is limited to these examples; the embodiments or technical features among different embodiments can be combined, and the steps can be implemented in any order, and there are many other changes to the aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of brevity.

[0061] Although the present application has been described in conjunction with the specific embodiments thereof, it is to be understood that many alternatives, modifications and variations will be apparent to those skilled in the art in the light of the foregoing description.

[0062] The embodiments of the present application are intended to cover all such alternatives, modifications and variations as falling within the broad scope of the appended claims. Accordingly, any one of the claims is intended to embrace all such alternatives, modifications and variations as falling within the scope of the present application.

Claims

1. A precision grating tester, characterized in that, include: The main frame, with a light source installed at the top of the main frame; A first driving component is disposed on the main body of the frame; The first driving component is connected to a grating, which is located above the light source; A light-transmitting cover is detachably connected to the top of the frame body and forms a cavity, with the light source and the grating located inside the cavity; The test component is connected to the light-transmitting cover within the cavity; And located above the grating; A light shield is provided over at least a portion of the light-transmitting shield; the light shield is movable relative to the light-transmitting shield along the height direction of the frame body.

2. The grating precision testing instrument according to claim 1, characterized in that, The first driving component includes: The first motor is fixedly connected to the side wall of the frame body within the frame body; A first drive rod extends along the height direction of the frame body; one end of the first drive rod is connected to the output shaft of the first motor, and the other end is detachably connected to the grating.

3. The grating precision tester according to claim 2, characterized in that, The main frame body is provided with a first bearing seat, which is connected to the first drive rod.

4. The grating precision testing instrument according to claim 1, characterized in that, Also includes: A second driving component is disposed on the frame body and connected to the light shield to drive the light shield to move along the height direction of the frame body.

5. The grating precision testing instrument according to claim 4, characterized in that, The second driving component includes: The second motor is fixedly connected to the side wall of the frame body inside the frame body; The second drive rod, the bottom end of which is connected to the output shaft of the second motor; The bushing is fixedly connected to the sunshade via a connecting block and is connected to the second drive rod via a thread.

6. The grating precision tester according to claim 5, characterized in that, The second driving component also includes: A protective cover is disposed on the top of the frame body and covers the portion of the second drive rod; the protective cover is connected to the top end of the second drive rod; The protective cover has a limiting groove along the height direction of the frame body, and the connecting block is slidably disposed within the limiting groove.

7. The grating precision testing instrument according to claim 5, characterized in that, The second driving component is provided with at least two sets.

8. The grating precision tester according to claim 5, characterized in that, The main frame body is provided with a second bearing seat, which is connected to the second drive rod.

9. The grating precision tester according to claim 1, characterized in that, The test components include: A counter is connected to the light-transmitting cover inside the cavity and is located above the grating; The sensor is connected to the counter on the side near the main body of the frame and is located above the grating.

10. The grating precision testing instrument according to claim 1, characterized in that, The light-transmitting cover is made of acrylic material, and the light-shielding cover is made of engineering plastic.

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