Synchronous transmission mechanism and mobile bridge type image measuring instrument

Abstract

The utility model relates to a synchronous transmission mechanism and a movable bridge type image measuring instrument, the synchronous transmission mechanism comprises a base, an optical main body, a bottom light source, a first transmission mechanism and a second transmission mechanism, the optical main body is movably connected with the base along a first direction, and a lens is arranged on the optical main body; the bottom light source is movably connected with the base in the first direction, the bottom light source and the lens are arranged at intervals in the height direction, and the first direction intersects with the height direction. The first transmission mechanism comprises a first synchronous belt and a first synchronous wheel, the first synchronous wheel is installed on the base and engaged with the first synchronous belt, and the two ends of the first synchronous belt are connected with the two ends of the optical body in the first direction respectively. The second transmission mechanism comprises a second synchronous belt and a second synchronous wheel, the second synchronous wheel is installed on the base and meshed with the second synchronous belt, the two ends of the second synchronous belt are connected with the two ends of the bottom light source in the first direction respectively, and the second synchronous wheel is connected with the first synchronous wheel through a transmission shaft.

Description

Technical Field

[0001] This application relates to the field of image measurement technology, and in particular to a synchronous transmission mechanism and a moving bridge image measuring instrument. Background Technology

[0002] Image measuring instruments, also known as precision image surveying instruments, overcome the shortcomings of traditional projectors. They are new high-precision, high-tech measuring instruments integrating optics, mechanics, electronics, and computer imaging technology. Image measuring instruments utilize an optical microscope to magnify the image of the object being measured at high magnification. The magnified image is then transmitted to a computer via a lens. Therefore, they can efficiently detect the contours, surface shapes, dimensions, angles, and positions of various complex workpieces, especially for the microscopic inspection and quality control of precision parts. The working principle of an image measuring instrument is as follows: after illumination by surface light or contour light, the image is captured through a zoom lens and transmitted to a computer screen. Then, using the video crosshairs generated on the monitor as a reference, the object is aimed and measured. The optical body moves the optical scale along the x and y axes, and the data processor processes and calculates the data to complete the measurement. The x and y axes are two mutually perpendicular directions on a horizontal plane.

[0003] Vision measuring instruments generally include a lens and a bottom light source located below the lens. The bottom light source illuminates the object being measured from below, making the outline of the object captured by the lens clearer and thus improving the accuracy of the measurement results. Therefore, the quality of the bottom light source is crucial to the overall measurement accuracy of the instrument. To ensure that the vision measuring instrument has good bottom light support during the measurement process, the bottom light source needs to move synchronously with the lens. Utility Model Content

[0004] Therefore, it is necessary to provide a synchronous transmission mechanism and a moving bridge image measuring instrument that can realize the synchronous movement of the lens and the bottom light source in the first direction to address the above-mentioned technical problems.

[0005] An embodiment of the first aspect of this application provides a synchronous transmission mechanism, including a base, an optical body, a bottom light source, a first transmission mechanism, and a second transmission mechanism. The optical body is movably connected to the base along a first direction, and a lens is provided on the optical body. The bottom light source is movably connected to the base along the first direction, and the bottom light source and the lens are spaced apart along the height direction, with the first direction intersecting the height direction. The first transmission mechanism includes a first synchronous belt and a first synchronous pulley. The first synchronous pulley is mounted on the base and meshes with the first synchronous belt, and both ends of the first synchronous belt are respectively connected to both ends of the optical body in the first direction. The second transmission mechanism includes a second synchronous belt and a second synchronous pulley. The second synchronous pulley is mounted on the base and meshes with the second synchronous belt, and both ends of the second synchronous belt are respectively connected to both ends of the bottom light source in the first direction. The second synchronous pulley and the first synchronous pulley are connected by a transmission shaft. When the optical body moves along the first direction, the first synchronous pulley is driven to rotate by the first synchronous belt. When the first synchronous pulley rotates, the bottom light source and the lens on the optical body move synchronously along the first direction through the second synchronous pulley and the second synchronous belt.

[0006] In one embodiment, the first transmission mechanism includes two first synchronous pulleys, both of which mesh with a first synchronous belt; the second transmission mechanism includes two second synchronous pulleys, both of which mesh with a second synchronous belt, and the two second synchronous pulleys are connected to the two first synchronous pulleys respectively via two transmission shafts.

[0007] In one embodiment, the line connecting the centers of the two first synchronous pulleys is parallel to a first direction, and the line connecting the centers of the two second synchronous pulleys is also parallel to the first direction.

[0008] In one embodiment, the optical body is located above the line connecting the centers of the two first synchronous wheels, and the bottom light source is located above the line connecting the centers of the two second synchronous wheels; or, the optical body is located below the line connecting the centers of the two first synchronous wheels, and the bottom light source is located below the line connecting the centers of the two second synchronous wheels.

[0009] In one embodiment, it further includes: a pretensioning mechanism, mounted on the base, the pretensioning mechanism being connected to the first synchronous pulley and / or the second synchronous pulley, the pretensioning mechanism being used to tighten the first synchronous belt and / or the second synchronous belt.

[0010] In one embodiment, the pre-tightening mechanism includes: a fixed seat mounted on a base; a movable seat movably connected to the fixed seat, a first synchronous wheel and a second synchronous wheel being rotatably connected to the movable seat, the first synchronous wheel and the second synchronous wheel being connected to the base through the movable seat and the fixed seat; and an elastic element connecting the fixed seat and the movable seat, the elastic element applying a force to the movable seat away from the direction of the bottom light source.

[0011] In one embodiment, the first transmission mechanism further includes a third synchronous pulley, which meshes with the first synchronous belt; the synchronous transmission mechanism further includes a first driving member, which is mounted on the base and connected to the optical body for driving the optical body to move along a first direction.

[0012] In one embodiment, the first transmission mechanism further includes a reversing wheel, with at least a portion of the first timing belt overlapping the working surface of the reversing wheel.

[0013] In one embodiment, it further includes: a first slide rail, mounted on the base, the first slide rail extending along a second direction, the first direction, the second direction and the height direction intersecting each other; a sliding seat, slidably connected to the first slide rail, the optical body, the bottom light source, the first transmission mechanism and the second transmission mechanism are all connected to the base through the sliding seat; and a third driving member, mounted on the base, the third driving member connected to the sliding seat, for driving the sliding seat to move along the first slide rail.

[0014] An embodiment of the second aspect of this application provides a mobile bridge-type image measuring instrument, including a synchronous transmission mechanism as described in any of the first aspect embodiments above.

[0015] The synchronous transmission mechanism provided in this application, by setting a first transmission mechanism and a second transmission mechanism, wherein the first synchronous belt in the first transmission mechanism is connected to both the optical body and meshes with the first synchronous wheel, and the second synchronous belt in the second transmission mechanism is connected to both the bottom light source and meshes with the second synchronous wheel, and the first synchronous wheel and the second synchronous wheel are connected by a transmission shaft, so that when the optical body moves along the first direction, it can drive the first synchronous wheel to rotate through the first synchronous belt, the first synchronous wheel rotates synchronously with the second synchronous wheel through the transmission shaft, and the second synchronous wheel drives the bottom light source to move along the first direction through the second synchronous belt, thereby realizing the synchronous movement of the lens on the optical body and the bottom light source in the first direction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a synchronous transmission mechanism according to some embodiments of this application.

[0018] Figure 2 A schematic diagram of the connection of an example synchronous transmission mechanism is shown.

[0019] Figure 3A schematic diagram of an example of a first transmission mechanism, a second transmission mechanism, and a bottom light source is shown.

[0020] Figure 4 A partially enlarged schematic diagram of an example of a first synchronous belt, a third synchronous pulley, and a reversing pulley is shown.

[0021] Figure 5 A partially enlarged schematic diagram of an example preload mechanism, a first transmission mechanism, and a second transmission mechanism is shown.

[0022] Figure label:

[0023] 10. Synchronous transmission mechanism;

[0024] 100. Base;

[0025] 200. Optical components; 210. Lens;

[0026] 300, bottom light source;

[0027] 400. First transmission mechanism; 410. First synchronous belt; 420. First synchronous pulley; 430. Third synchronous pulley; 440. Reversing pulley;

[0028] 500. Second transmission mechanism; 510. Second synchronous belt; 520. Second synchronous pulley;

[0029] 600. Pre-tensioning mechanism; 610. Fixed seat; 620. Movable seat; 630. Elastic element; 640. Guide rod;

[0030] 700, First slide rail; 710, Sliding seat; 720, Second slide rail;

[0031] x, first direction; y, second direction; z, altitude direction. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] The synchronous transmission mechanism provided in the embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that in the drawings, the x-direction is the first direction, the y-direction is the second direction, and the z-direction is the height direction. In the drawings, for ease of drawing, the dimensions are not necessarily proportional to the actual dimensions.

[0039] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a synchronous transmission mechanism according to some embodiments of this application. Figure 2 A schematic diagram of the connection of an example synchronous transmission mechanism is shown. Figure 3 A schematic diagram of an example of a first transmission mechanism, a second transmission mechanism, and a bottom light source is shown.

[0040] like Figures 1 to 3 As shown, this application provides a synchronous transmission mechanism 10, including a base 100, an optical body 200, a bottom light source 300, a first transmission mechanism 400, and a second transmission mechanism 500. The optical body 200 is movably connected to the base 100 along a first direction (x-direction in the figure), and a lens 210 is provided on the optical body 200. The bottom light source 300 is movably connected to the base 100 along the first direction x, and the bottom light source 300 and the lens 210 are spaced apart along the height direction (z-direction in the figure), with the first direction x intersecting the height direction z. The first transmission mechanism 400 includes a first synchronous belt 410 and a first synchronous pulley 420. The first synchronous pulley 420 is mounted on the base 100 and meshes with the first synchronous belt 410, and the two ends of the first synchronous belt 410 are respectively connected to the two ends of the optical body 200 in the first direction x. The second transmission mechanism 500 includes a second synchronous belt 510 and a second synchronous pulley 520. The second synchronous pulley 520 is mounted on the base 100 and meshes with the second synchronous belt 510. The two ends of the second synchronous belt 510 are respectively connected to the two ends of the bottom light source 300 in the first direction x. The second synchronous pulley 520 and the first synchronous pulley 510 are connected by a transmission shaft (not shown). When the optical body 200 moves along the first direction x, it drives the first synchronous pulley 420 to rotate through the first synchronous belt 410. When the first synchronous pulley 420 rotates, it drives the bottom light source 300 and the lens 210 on the optical body 200 to move synchronously along the first direction x through the second synchronous pulley 520 and the second synchronous belt 510.

[0041] Optionally, the bottom light source 300 is oriented towards the lens 210, meaning the bottom light source 300 emits light upwards while the lens 210 shoots downwards. When the material to be measured is located between the bottom light source 300 and the lens 210, the bottom light source 300 illuminates the outline of the material, making the image captured by the lens 210 clearer.

[0042] Optionally, the diameter of the first synchronous pulley 420 is equal to the diameter of the second synchronous pulley 520, and the transmission ratio between the first synchronous pulley 420 and the first synchronous belt 410 is equal to the transmission ratio between the second synchronous pulley 520 and the second synchronous belt 510, so that when the first synchronous belt 410 drives the second synchronous belt 420 to move through the first synchronous pulley 420 and the second synchronous pulley 520, the moving speeds of the first synchronous belt 410 and the second synchronous belt 510 are the same.

[0043] In this configuration, the first synchronous belt 410 is connected to both ends of the optical body 200 in the first direction x, forming a ring-shaped synchronous belt structure. When the first synchronous belt 410 is taut, the pulling force exerted on it when it moves to the left and right in the first direction x is opposite, thus causing the rotation direction of the first synchronous pulley 420 to also be opposite. Similarly, the second synchronous belt 510 is connected to both ends of the bottom light source in the first direction x, forming another ring-shaped synchronous belt structure with the bottom light source 300. When the second synchronous belt 510 is taut, the rotation direction of the second synchronous pulley 520 is opposite, and the driving direction of the second synchronous pulley 520 on the second synchronous belt 510 is also opposite, thus causing the pulling force exerted by the second synchronous belt 510 on the bottom light source 300 in the first direction x to also be opposite.

[0044] It is easy to understand that the specific shape of the annular synchronous belt structure composed of the first synchronous belt 410 and the optical body 200 is related to the number and arrangement of the first synchronous pulleys 420. The specific shape of the annular synchronous belt structure composed of the second synchronous belt 510 and the bottom light source 300 is related to the number and arrangement of the second synchronous pulleys 520.

[0045] Optionally, the first synchronous belt 410 and the second synchronous belt 510 can also be replaced by a toothed chain or a rack.

[0046] The synchronous transmission mechanism 10 of this application embodiment, by setting a first transmission mechanism 400 and a second transmission mechanism 500, wherein the first synchronous belt 410 in the first transmission mechanism 400 is connected to both the optical body 200 and engaged with the first synchronous wheel 420, and the second synchronous belt 510 in the second transmission mechanism 500 is connected to both the bottom light source 300 and engaged with the second synchronous wheel 520, and the first synchronous wheel 420 and the second synchronous wheel 520 are connected by a transmission shaft, so that when the optical body 200 moves along the first direction x, it can drive the first synchronous wheel 420 to rotate through the first synchronous belt 410, and the first synchronous wheel 420 rotates synchronously with the second synchronous wheel 520 through the transmission shaft, and the second synchronous wheel 520 drives the bottom light source 300 to move along the first direction x through the second synchronous belt 510, thereby realizing the synchronous movement of the lens 210 on the optical body 200 and the bottom light source 300 in the first direction x.

[0047] In some embodiments, the first transmission mechanism 400 includes two first synchronous pulleys 420, both of which mesh with a first synchronous belt 410. The second transmission mechanism 500 includes two second synchronous pulleys 520, both of which mesh with a second synchronous belt 510, and the two second synchronous pulleys 520 are respectively connected by two transmission shafts.

[0048] Optionally, the line connecting the centers of the two first synchronous pulleys 420 is parallel to the first direction x, and the line connecting the centers of the two second synchronous pulleys 520 is also parallel to the first direction x. The two second synchronous pulleys 520 taut the second synchronous belt 510 along the first direction x, causing the second synchronous belt 510 located between the two second synchronous pulleys 520 to also extend along the first direction x. When the second synchronous belt 510 moves, it pulls the bottom light source 300 to move along the first direction x, thereby reducing the speed deviation between the bottom light source 300 and the lens 210.

[0049] Optionally, the optical body 200 is located above the line connecting the centers of the two first synchronous pulleys 420, and the bottom light source 300 is located above the line connecting the centers of the two second synchronous pulleys 520; or, the optical body 200 is located below the line connecting the centers of the two first synchronous pulleys 420, and the bottom light source 300 is also located below the line connecting the centers of the two second synchronous pulleys 520. This embodiment is illustrated by assuming that the optical body 200 is located above the line connecting the centers of the two first synchronous pulleys 420, and the bottom light source 300 is located above the line connecting the centers of the two second synchronous pulleys 520. When the optical body 200 is above the line connecting the centers of the two first synchronous pulleys 420, the bottom light source 300 is located above the line connecting the centers of the two second synchronous pulleys 520. Figure 2When the optical body 200 moves to the left from the perspective of the lens 210, the first synchronous belt 410 drives the two first synchronous pulleys 420 to rotate counterclockwise. The first synchronous pulleys 420 drive the second synchronous pulley 520 to rotate counterclockwise. The second synchronous pulley 520 then drives the bottom light source 300 to move to the left via the second synchronous belt 510, thereby achieving synchronous movement between the lens 210 and the bottom light source 300 on the optical body 200. Figure 2 When the optical body 200 moves to the right from the perspective of the center, the optical body 200 drives the two first synchronous wheels 420 to rotate clockwise via the first synchronous belt 410. The first synchronous wheels 420 drive the second synchronous wheels 520 to rotate clockwise. The second synchronous wheels 520 then drive the bottom light source 300 to move to the right via the second synchronous belt 510, thus achieving the same direction of movement for the optical body 200 and the bottom light source 300.

[0050] In other embodiments, when the optical body 200 is located below the line connecting the centers of the two first synchronous wheels 420, and the bottom light source 300 is also located below the line connecting the centers of the two second synchronous wheels 520, the transmission logic can refer to the transmission logic in this embodiment, and will not be repeated here.

[0051] The synchronous transmission mechanism 10 of this application embodiment uses two second synchronous pulleys 520 to taut the second synchronous belt 510 along the first direction x, so that the second synchronous belt 510 located between the two second synchronous pulleys 520 also extends along the first direction x. When the second synchronous belt 510 moves, it pulls the bottom light source 300 to move along the first direction x, thereby reducing the speed deviation between the bottom light source 300 and the lens 210. By positioning the optical body 200 and the bottom light source 300 on the same side of the line connecting their respective synchronous pulleys, when the optical body 200 drives the bottom light source 300 to move through the first transmission mechanism 400 and the second transmission mechanism 500, the moving directions of the optical body 200 and the bottom light source 300 are the same, thereby achieving synchronous movement of the lens 210 on the optical body 200 and the bottom light source 300.

[0052] Please refer to Figures 1 to 4 , Figure 4 A partially enlarged schematic diagram of an example of a first synchronous belt, a third synchronous pulley, and a reversing pulley is shown.

[0053] like Figures 1 to 4 As shown, in some embodiments, the first transmission mechanism 400 further includes a third synchronous pulley 430, which meshes with the first synchronous belt 410. The synchronous transmission mechanism 10 also includes a first driving member (not shown), which is mounted on the base 100 and connected to the optical body 200 for driving the optical body 200 to move along a first direction x.

[0054] Optionally, the first transmission mechanism 400 further includes a reversing pulley 440, with at least a portion of the first synchronous belt 410 overlapping the working surface of the reversing pulley 440. The first synchronous belt 410 does not mesh with the reversing pulley 440. The reversing pulley 440 and the third synchronous pulley 430 together change the overall shape of the first synchronous belt 410 and tighten it. Simultaneously, the reversing pulley 440 can also increase the wrap angle of the first synchronous belt 410 on the first synchronous pulley 420, increasing the contact area between the first synchronous belt 410 and the first synchronous pulley 420, thereby increasing torque and reducing pressure concentration. In this embodiment, there are two reversing pulleys 440, with both reversing pulleys 440 and two third synchronous pulleys 430 located above, and two first synchronous pulleys 420 located below. The first synchronous belt 410 forms a rectangle whose width dimension is close to its length dimension.

[0055] Please refer to Figure 1 , Figure 2 and Figure 5 , Figure 5 A partially enlarged schematic diagram of an example preload mechanism, a first transmission mechanism, and a second transmission mechanism is shown.

[0056] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the synchronous transmission mechanism 10 further includes a pretensioning mechanism 600, which is mounted on the base 100 and connected to the first synchronous pulley 420 and / or the second synchronous pulley 520. The pretensioning mechanism 600 is used to tighten the first synchronous belt 410 and / or the second synchronous belt 510.

[0057] Optionally, the pre-tensioning mechanism 600 includes a fixed base 610, a movable base 620, and an elastic element 630. The fixed base 610 is mounted on the base 100. The movable base 620 is movably connected to the fixed base 610. The first synchronous pulley 420 and the second synchronous pulley 520 are rotatably connected to the movable base 620. The first synchronous pulley 420 and the second synchronous pulley 520 are connected to the base 100 through the movable base 620 and the fixed base 610. The elastic element 630 connects the fixed base 610 and the movable base 620, and applies a force to the movable base 620 in a direction away from the bottom light source 300.

[0058] Optionally, the elastic element 630 is a spring. The movable seat 620 is provided with a receiving cavity (not shown), and at least part of the first synchronous pulley 420 and the second synchronous pulley 520 are located in the receiving cavity. The first synchronous pulley 420 and the second synchronous pulley 520 are rotatably connected to the movable seat 620 through a drive shaft.

[0059] Optionally, the pretensioning mechanism 600 further includes a guide rod 640 extending along a first direction x. The guide rod 640 is mounted on the fixed seat 610, and the movable seat 620 is movably connected to the guide rod 640, so that the movable seat 620 can move relative to the fixed seat 610 along the extension direction of the guide rod 640.

[0060] The synchronous transmission mechanism 10 of this application embodiment has two pre-tensioning mechanisms 600, which apply forces to the two sets of synchronous pulleys in a direction away from the bottom light source 300, thereby tightening the first synchronous belt 410 and the second synchronous belt 510, increasing the tension of the synchronous belts, and avoiding inconsistent movement displacement between the optical body 200 and the bottom light source 300, which would cause the bottom light source 300 and the lens 210 to be misaligned vertically. This results in a significant improvement in the measurement effect and accuracy of the synchronous transmission mechanism 10.

[0061] Of course, in other embodiments, the third synchronous pulley 430 and the reversing pulley 440 can also be connected to the base 100 through the pretensioning mechanism 600 to tighten the first synchronous belt 410.

[0062] like Figure 1 As shown, in some embodiments, the synchronous transmission mechanism 10 further includes a first slide rail 700, a sliding seat 710, and a third driving member (not shown). The first slide rail 700 is mounted on the base 100 and extends along a second direction (y-direction in the figure). The first direction x, the second direction y, and the height direction z are arranged to intersect each other. The sliding seat 710 is slidably connected to the first slide rail 700. The optical body 200, the bottom light source 300, the first transmission mechanism 400, and the second transmission mechanism 500 are all connected to the base 100 through the sliding seat 710. The third driving member is mounted on the base 100 and connected to the sliding seat 710, and is used to drive the sliding seat 710 to move along the first slide rail 700.

[0063] Optionally, the pre-tensioning mechanism 600 and the first drive member are also connected to the base 100 via the sliding seat 710.

[0064] Optionally, the synchronous transmission mechanism 10 further includes a second slide rail 720 extending along the first direction x. The second slide rail 720 is mounted on the sliding seat 710. The optical body 200 is slidably connected to the second slide rail 720. The first driving member drives the optical body 200 to move along the second slide rail 720.

[0065] Optionally, the synchronous transmission mechanism 10 also includes a fourth driving member, which is mounted on the sliding seat 710 and connected to the optical body 200 for driving the optical body 200 to move along the height direction z.

[0066] Optionally, the first, third, and fourth driving components are all motors.

[0067] The synchronous transmission mechanism 10 of this application embodiment is provided with a sliding seat 710, and the optical body 200 and the bottom light source 300 are both connected to the base 100 through the sliding seat 710. When the third driving member drives the sliding seat 710 to move along the first slide rail 700, the bottom light source 300 and the lens 210 on the optical body 200 move synchronously along the second direction y.

[0068] In some embodiments, the synchronous transmission mechanism 10 further includes a coaxial light source (not shown) and a surface light source (not shown). Both the coaxial light source and the surface light source are mounted on the optical body 200. The coaxial light source is aligned with the lens 210 and is used to vertically illuminate the material to be measured from top to bottom. The surface light source is located around the lens 210 and illuminates the material to be measured obliquely.

[0069] The second aspect of this application also provides a mobile bridge-type image measuring instrument, including the synchronous transmission mechanism 10 of any of the first aspect embodiments described above. Since the mobile bridge-type image measuring instrument provided in the second aspect of this application includes the synchronous transmission mechanism 10 of any of the above embodiments, it possesses the beneficial effects of the synchronous transmission mechanism 10 of any of the above embodiments, which will not be elaborated further here.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A synchronous transmission mechanism, characterized in that, include: Base; An optical body is movablely connected to the base along a first direction, and a lens is provided on the optical body; A bottom light source is movable and connected to the base along the first direction. The bottom light source and the lens are spaced apart along the height direction, and the first direction intersects the height direction. The first transmission mechanism includes a first synchronous belt and a first synchronous pulley. The first synchronous pulley is mounted on the base and meshes with the first synchronous belt. The two ends of the first synchronous belt are respectively connected to the two ends of the optical body in the first direction. The second transmission mechanism includes a second synchronous belt and a second synchronous pulley. The second synchronous pulley is mounted on the base and meshes with the second synchronous belt. The two ends of the second synchronous belt are respectively connected to the two ends of the bottom light source in the first direction. The second synchronous pulley and the first synchronous pulley are connected by a transmission shaft. When the optical body moves along the first direction, it drives the first synchronous wheel to rotate via the first synchronous belt. When the first synchronous wheel rotates, it drives the bottom light source and the lens on the optical body to move synchronously along the first direction via the second synchronous wheel and the second synchronous belt.

2. The synchronous transmission mechanism according to claim 1, characterized in that, The first transmission mechanism includes two first synchronous pulleys, both of which mesh with the first synchronous belt; The second transmission mechanism includes two second synchronous pulleys, both of which mesh with the second synchronous belt, and the two second synchronous pulleys are connected to the two first synchronous pulleys respectively through two transmission shafts.

3. The synchronous transmission mechanism according to claim 2, characterized in that, The line connecting the centers of the two first synchronous pulleys is parallel to the first direction, and the line connecting the centers of the two second synchronous pulleys is parallel to the first direction.

4. The synchronous transmission mechanism according to claim 3, characterized in that, The optical body is located above the line connecting the centers of the two first synchronous wheels, and the bottom light source is located above the line connecting the centers of the two second synchronous wheels. Alternatively, the optical body is located below the line connecting the centers of the two first synchronous wheels, and the bottom light source is located below the line connecting the centers of the two second synchronous wheels.

5. The synchronous transmission mechanism according to claim 1, characterized in that, Also includes: A pre-tensioning mechanism is installed on the base and is connected to the first synchronous pulley and / or the second synchronous pulley. The pre-tensioning mechanism is used to tighten the first synchronous belt and / or the second synchronous belt.

6. The synchronous transmission mechanism according to claim 5, characterized in that, The pre-tightening mechanism includes: A fixed base is installed on the base; A movable seat is movably connected to the fixed seat. The first synchronous wheel and the second synchronous wheel are rotatably connected to the movable seat. The first synchronous wheel and the second synchronous wheel are connected to the base through the movable seat and the fixed seat. An elastic element connects the fixed seat and the movable seat, and the elastic element applies a force to the movable seat away from the bottom light source.

7. The synchronous transmission mechanism according to claim 1, characterized in that, The first transmission mechanism further includes a third synchronous pulley, which meshes with the first synchronous belt; The synchronous transmission mechanism further includes a first driving member, which is mounted on the base and connected to the optical body for driving the optical body to move along the first direction.

8. The synchronous transmission mechanism according to claim 1, characterized in that, The first transmission mechanism also includes a reversing wheel, and at least a portion of the first timing belt overlaps the working surface of the reversing wheel.

9. The synchronous transmission mechanism according to claim 1, characterized in that, Also includes: A first slide rail is installed on the base, and the first slide rail extends along a second direction. The first direction, the second direction, and the height direction are intersected in pairs. A sliding seat is slidably connected to the first slide rail. The optical body, the bottom light source, the first transmission mechanism, and the second transmission mechanism are all connected to the base through the sliding seat. A third driving component is installed on the base and connected to the sliding seat, used to drive the sliding seat to move along the first slide rail.

10. A mobile bridge-type image measuring instrument, characterized in that, Includes the synchronous transmission mechanism as described in any one of claims 1 to 9.

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