Z-axis anti-collision structure applied to image measuring instrument and image measuring instrument

Abstract

The Z-axis anti-collision structure comprises an elastic transmission mechanism, an LED program control light source, a non-contact displacement sensor and a controller, and the elastic transmission mechanism comprises a mounting base, a transmission rod arranged on the mounting base in a sliding mode, a position detection assembly arranged at one end of the transmission rod and an elastic reset piece; the LED program-controlled light source is arranged at the other end of the transmission rod and can drive the transmission rod to slide relative to the mounting base in the Z-axis direction so as to drive the position detection assembly to move; the non-contact displacement sensor is arranged on the LED program-controlled light source, and the bottom of the non-contact displacement sensor is exposed out of the bottom of the LED program-controlled light source; the position detection assembly and the non-contact displacement sensor are electrically connected with the controller, and the controller can selectively start the position detection assembly or the non-contact displacement sensor. The anti-collision function is achieved through elastic contact type induction of the LED program control light source and non-contact type induction of the non-contact type displacement sensor.

Description

Technical Field

[0001] This utility model relates to the field of image measuring instruments, and in particular to a Z-axis anti-collision structure used in an image measuring instrument and the image measuring instrument itself. Background Technology

[0002] The image measuring instrument is based on CCD digital imaging and relies on the powerful software capabilities of computer screen measurement technology and spatial geometric calculation. After installing dedicated control and graphic measurement software, the computer becomes the measurement brain with a software soul, which is the main body of the entire device. It can quickly read the displacement value of the optical scale, and through the calculation of software modules based on spatial geometry, instantly obtain the desired result and generate a graphic on the screen for the operator to compare with the image, so as to intuitively identify possible deviations in the measurement result.

[0003] In the prior art, the image measuring instrument includes a base and a Z-axis slide plate set on the base. A lens group is set on the Z-axis slide plate, and an LED programmable light source is fixed below the lens group. With this structure, it is difficult for the user to grasp the moving distance of the lens group. When the Z-axis slide plate is moved downward, the LED programmable light source fixed at the bottom of the lens group is likely to hit the workpiece to be measured on the worktable, thereby causing damage to the LED programmable light source and the workpiece to be measured.

[0004] Therefore, it is necessary to design a new technical solution to solve the above problems. Utility Model Content

[0005] In view of the above, this utility model addresses the deficiencies of the existing technology, and its main objective is to provide a Z-axis anti-collision structure for use in an image measuring instrument and the image measuring instrument itself. It incorporates an elastic transmission mechanism, which includes a mounting base, a transmission rod, a position detection component at one end of the transmission rod, and an LED programmable light source at the other end of the transmission rod. A diffuse reflection photoelectric switch is mounted on the LED programmable light source. The elastic contact sensing of the LED programmable light source and the non-contact sensing of the diffuse reflection photoelectric switch achieve the anti-collision function. When detecting flat, fragile workpieces, the controller uses the diffuse reflection photoelectric switch for distance detection; when detecting irregular, non-fragile workpieces, the controller uses the position detection component for distance detection. This allows for the detection of various workpieces, and the structure is ingeniously designed with good versatility.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A Z-axis anti-collision structure for use in an image measuring instrument includes:

[0008] The elastic transmission mechanism includes a mounting base for fixing on the Z-axis slide plate of the image measuring instrument, a transmission rod slidably disposed on the mounting base, a position detection component disposed at one end of the transmission rod for detecting the displacement of the transmission rod, and an elastic reset component for driving the transmission rod to reset.

[0009] The LED programmable light source is located at the other end of the transmission rod. The LED programmable light source can drive the transmission rod to slide relative to the mounting base along the Z-axis, thereby driving the position detection component to move.

[0010] A non-contact displacement sensor is disposed on an LED programmable light source, with the bottom of the non-contact displacement sensor exposed above the bottom of the LED programmable light source, and is used to detect the distance from the bottom of the LED programmable light source to the workpiece to be measured.

[0011] The controller is electrically connected to both the position detection component and the non-contact displacement sensor, and the controller can selectively activate either the position detection component or the non-contact displacement sensor.

[0012] As a preferred embodiment, the mounting base includes a fixing block and a limiting block disposed on the top of the fixing block. The fixing block and the limiting block together have a vertically penetrating guide groove. The transmission rod passes through the guide groove. The limiting block is provided with a receiving groove for accommodating an elastic reset member. The elastic reset member is at least partially placed in the receiving groove. The top of the elastic reset member abuts against the top wall of the receiving groove. The transmission rod is provided with an overlapping portion corresponding to the receiving groove. The bottom of the elastic reset member abuts against the overlapping portion.

[0013] As a preferred embodiment, the limiting block is in the shape of an inverted "U".

[0014] As a preferred embodiment, a mounting block is provided at the bottom of the transmission rod, and the LED programmable light source is located at the bottom of the mounting block.

[0015] As a preferred embodiment, the elastic reset element is a reset spring.

[0016] As a preferred embodiment, the LED programmable light source has a through hole running vertically through it, and the non-contact displacement sensor is installed in the through hole, with the bottom of the non-contact displacement sensor exposed at the bottom of the through hole.

[0017] As a preferred embodiment, the bottom of the non-contact displacement sensor is flush with the bottom of the LED programmable light source.

[0018] As a preferred embodiment, the bottom portion of the non-contact displacement sensor protrudes from the bottom of the through hole.

[0019] An image measuring instrument includes an image measuring instrument body and a Z-axis anti-collision structure used in the image measuring instrument.

[0020] As a preferred embodiment, the image measuring instrument body includes a base and a Z-axis slide plate disposed above the base. A lens assembly is disposed on the Z-axis slide plate. The mounting base is disposed on the Z-axis slide plate and located beside the lens assembly. The LED programmable light source is located below the lens assembly. The controller controls the Z-axis slide plate to stop moving or retract based on the set position signal fed back by the position detection component or the non-contact displacement sensor.

[0021] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0022] Its main feature is the use of an elastic transmission mechanism, which includes a mounting base, a transmission rod, a position detection component at one end of the transmission rod, and an LED programmable light source at the other end of the transmission rod. A non-contact displacement sensor is also mounted on the LED programmable light source. The elastic contact sensing of the LED programmable light source and the non-contact sensing of the non-contact displacement sensor achieve collision prevention. When detecting flat, fragile workpieces, the controller uses the non-contact displacement sensor for distance detection; when detecting irregular, non-fragile workpieces, the controller uses the position detection component for distance detection. This allows for the detection of various workpieces, and the ingenious structural design provides excellent versatility.

[0023] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a side view of the Z-axis anti-collision structure of a preferred embodiment of the present invention;

[0025] Figure 2 This is a three-dimensional schematic diagram of the image measuring instrument according to a preferred embodiment of the present utility model;

[0026] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0027] Explanation of reference numerals in the attached diagram:

[0028] 10. Image measuring instrument body 11. Base

[0029] 12. Z-axis skateboard 13. Lens assembly

[0030] 14. Worktable; 20. Flexible transmission mechanism

[0031] 21. Mounting base 211. Fixing block

[0032] 212. Limiting block; 213. Guide groove

[0033] 214. Receiving groove; 22. Transmission rod

[0034] 221. Overlap joint 222. Mounting block

[0035] 23. Position detection component 231. Reading head

[0036] 232. Grating ruler; 24. Elastic reset component

[0037] 30. LED programmable light source; 31. Via.

[0038] 40. Non-contact displacement sensors; 50. Irregular, non-fragile workpieces.

[0039] 60. Flat, fragile workpieces. Detailed Implementation

[0040] First, it should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0041] Please refer to Figures 1 to 3 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including an image measuring instrument body 10, an elastic transmission mechanism 20, an LED programmable light source 30, a non-contact displacement sensor 40, and a controller (not shown in the figure).

[0042] The image measuring instrument body 10 includes a base 11 and a Z-axis slide plate 12 disposed above the base 11. A lens group 13 is disposed on the Z-axis slide plate 12. The Z-axis slide plate 12 can drive the lens group 13 to move along the Z-axis direction. The Z-axis slide plate 12 can be driven by a servo motor in conjunction with a lead screw. A worktable 14 that can move along the XY axis is also disposed on the base 11. The driving of the worktable 14 and the driving of the Z-axis slide plate 12 are existing known technologies and will not be described in detail here.

[0043] The elastic transmission mechanism 20 includes a mounting base 21 for fixing on the Z-axis slide plate 12 of the image measuring instrument, a transmission rod 22 slidably disposed on the mounting base 21, a position detection component 23 disposed at one end of the transmission rod 22, and an elastic reset member 24 for driving the transmission rod 22 to reset.

[0044] Specifically, see Figure 2 and Figure 3As shown, the mounting base 21 is disposed on the Z-axis slide plate 12 and located beside the lens assembly 13; the mounting base 21 includes a fixing block 211 and a limiting block 212 disposed on the top of the fixing block 211. The fixing block 211 and the limiting block 212 together have a vertically penetrating guide groove 213. The transmission rod 22 passes through the guide groove 213. The limiting block 212 is provided with a receiving groove 214 for accommodating the elastic reset member 24. The elastic reset member 24 is at least partially placed in the receiving groove 214. The top of the elastic reset member 24 abuts against the top wall of the receiving groove 214. The transmission rod 22 is provided with an overlapping part 221 corresponding to the receiving groove 214. The bottom of the elastic reset member 24 abuts against the overlapping part 221.

[0045] In this embodiment, the limiting block 212 is inverted "U" shape, and the elastic reset member 24 is a reset spring; see reference Figure 1 As shown, the position detection component 23 is a grating sensor, which includes a reading head 231 and a grating ruler 232 for fixing on the Z-axis slide plate 12 of the image measuring instrument; in some other embodiments, the position detection component 23 can be other non-contact displacement sensors or contact displacement sensors, such as magnetic grating sensors or capacitive grating sensors.

[0046] The LED programmable light source 30 is disposed at the other end of the transmission rod 22. The LED programmable light source 30 can drive the transmission rod 22 to slide relative to the mounting base 21 along the Z-axis, thereby driving the position detection component 23 to move; specifically, see Figure 2 As shown, the LED programmable light source 30 is located below the lens group 13, and a mounting block 222 is provided at the bottom of the transmission rod 22, with the LED programmable light source 30 located at the bottom of the mounting block 222.

[0047] The non-contact displacement sensor 40 is mounted on the LED programmable light source 30, with its bottom exposed above the bottom of the LED programmable light source 30; specifically, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the LED programmable light source 30 has a through hole 31 that runs vertically through it. The non-contact displacement sensor 40 is installed in the through hole 31. The bottom of the non-contact displacement sensor 40 is exposed at the bottom of the through hole 31. The bottom of the non-contact displacement sensor 40 is flush with the bottom of the LED programmable light source 30, or the bottom part of the non-contact displacement sensor 40 protrudes from the bottom of the through hole 31.

[0048] In this embodiment, the non-contact displacement sensor 40 is a diffuse reflection photoelectric switch. In some other embodiments, the non-contact displacement sensor 40 may also be a laser displacement sensor, an ultrasonic displacement sensor, etc.

[0049] The position detection component 23 and the non-contact displacement sensor 40 are both electrically connected to the controller. The controller can selectively activate the position detection component 23 or the non-contact displacement sensor 40. Specifically, the controller controls the Z-axis slide plate 12 to stop moving or retract based on the set position signal fed back by the position detection component 23 or the non-contact displacement sensor 40.

[0050] The usage method of this embodiment is described in detail below:

[0051] When the LED programmable light source 30 comes into contact with an irregular and fragile workpiece 50, the LED programmable light source 30 will compress the reset spring to move the reading head 231 upward to the set position, and output a signal to the controller to make the Z-axis slide plate 12 immediately retract or stop immediately or retract 10mm and then stop, so as to protect the Z-axis slide plate 12 and the workpiece to be measured.

[0052] The workpiece to be tested is a flat and fragile workpiece 60. The non-contact displacement sensor 40 can be activated. When the non-contact displacement sensor 40 reaches the sensing distance, the non-contact displacement sensor 40 outputs a signal to the controller, causing the Z-axis to immediately retract or stop, or retract 10mm and then stop, so as to protect the Z-axis slide plate 12 and the workpiece to be tested.

[0053] The key design feature of this utility model is:

[0054] Its main feature is the use of an elastic transmission mechanism, which includes a mounting base, a transmission rod, a position detection component at one end of the transmission rod, and an LED programmable light source at the other end of the transmission rod. A non-contact displacement sensor is also mounted on the LED programmable light source. The elastic contact sensing of the LED programmable light source and the non-contact sensing of the non-contact displacement sensor achieve collision prevention. When detecting flat, fragile workpieces, the controller uses the non-contact displacement sensor for distance detection; when detecting irregular, non-fragile workpieces, the controller uses the position detection component for distance detection. This allows for the detection of various workpieces, and the ingenious structural design provides excellent versatility.

[0055] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A Z-axis anti-collision structure applied to an image measuring instrument, characterized in that, The utility model relates to a kind of Z-axis anti-collision structure for image measuring instrument, including: Elastic transmission mechanism, the elastic transmission mechanism includes the mount for being fixed on the Z-axis slide plate of image measuring instrument, transmission rod is slidably arranged in the mount, position detection component for detecting the displacement of transmission rod is arranged at one end of transmission rod, elastic reset member for driving transmission rod reset; LED programmed light source, the LED programmed light source is arranged at the other end of transmission rod, the LED programmed light source can drive transmission rod to slide along Z axis relative to mount, and then drive position detection component to move; Non-contact displacement sensor, the non-contact displacement sensor is arranged on the LED programmed light source, the bottom of the non-contact displacement sensor is exposed to the bottom of the LED programmed light source, and is used for detecting the distance from the bottom of the LED programmed light source to the workpiece to be measured; Controller, the position detection component and the non-contact displacement sensor are electrically connected to the controller, and the controller can selectively start the position detection component or the non-contact displacement sensor.

2. The Z-axis anti-collision structure for use in an image measuring instrument according to claim 1, characterized in that: The mount includes a fixed block and a limiting block arranged on the top of the fixed block, the fixed block and the limiting block are provided with a guide sliding groove penetrating up and down, the transmission rod is arranged in the guide sliding groove, the limiting block is provided with a containing groove for accommodating the elastic reset member, at least part of the elastic reset member is arranged in the containing groove, the top of the elastic reset member abuts against the top wall of the containing groove, the transmission rod is provided with a lap joint portion corresponding to the containing groove, and the bottom of the elastic reset member abuts against the lap joint portion.

3. The Z-axis anti-collision structure for use in an image measuring instrument according to claim 2, characterized in that: The limiting block is in inverted "U” shape.

4. The Z-axis anti-collision structure for use in an image measuring instrument according to claim 1, characterized in that: The bottom of the transmission rod is provided with a mounting block, and the LED programmed light source is arranged on the bottom of the mounting block.

5. The Z-axis anti-collision structure for use in a video measuring instrument according to claim 1, characterized in that: The elastic reset member is a reset spring.

6. The Z-axis anti-collision structure for use in a video measuring instrument according to claim 1, characterized in that: The LED programmed light source is provided with a via penetrating up and down, the non-contact displacement sensor is arranged in the via, and the bottom of the non-contact displacement sensor is exposed to the bottom of the via.

7. The Z-axis anti-collision structure for use in a video measuring instrument according to claim 6, characterized in that: The bottom of the non-contact displacement sensor is flush with the bottom of the LED programmed light source.

8. The Z-axis anti-collision structure for use in a video measuring instrument according to claim 6, characterized in that: The bottom of the non-contact displacement sensor partially protrudes from the bottom of the via.

9. A video measuring instrument, characterized by: The utility model relates to an image measuring instrument body and a Z-axis anti-collision structure for image measuring instrument as claimed in any one of claims 1 to 8 arranged on the image measuring instrument body.

10. The videogrammeter of claim 9, wherein: The image measuring instrument body includes a base and a Z-axis slide plate arranged above the base, the Z-axis slide plate is provided with a lens group, the mount is arranged on the Z-axis slide plate and located beside the lens group, and the LED programmed light source is located below the lens group;The controller controls the Z-axis slide plate to stop moving or retreat according to the set position signal fed back by the position detection component or the non-contact displacement sensor.

Images