An intelligent fixture for image measuring instrument and clamping method thereof

Abstract

The present invention discloses an intelligent fixture for an image measuring instrument and a clamping method thereof, the intelligent fixture comprising a clamping plate body, a plurality of automatic lifting devices and an edge contour detection module; the clamping plate body is provided with a plurality of regularly arranged grooves, each of the grooves is provided with an automatic lifting device; the automatic lifting device comprises a lifting and fixing rod and a lifting and driving mechanism; the upper end of the lifting and fixing rod is provided with a telescopic pressing mechanism; the telescopic pressing mechanism comprises a pressing plate and a telescopic driving mechanism; the edge contour detection module is used to detect and identify the edge of the object to be measured. The intelligent fixture can clamp and fix objects to be measured of different shapes, sizes and materials, has high applicability and flexibility, and can realize automatic fixation of the object to be measured, has a high degree of automation, is simple to operate, and is more efficient; the stability of the object to be measured is maintained, thereby ensuring the efficiency of the measurement work and the accuracy of the measurement results.

Description

Technical Field

[0001] The present invention relates to the technical field of fixtures, and in particular to an intelligent fixture for an image measuring instrument and a clamping method thereof. Background Art

[0002] The image measuring instrument is a non-contact coordinate geometric measurement instrument. It is a new type of precision measuring instrument that combines graphics, imaging, optoelectronics and pattern recognition on the basis of traditional measuring machines. The main function of the image measuring instrument is to perform microscopic inspection of various parts, which requires the instrument to have high stability to ensure the accuracy of the measurement results. However, existing image measuring instruments are prone to tilting, slight shaking and other unstable conditions on uneven ground; in addition, the measuring table, moving slide rails and other components of the image measuring instrument will be displaced when the instrument needs to work. These conditions will cause the measured object to be offset and unstable. However, this unstable state of the measured object will affect the measurement results.

[0003] In order to solve the above problems, in the prior art, a fixture is usually used to clamp and fix the object to be measured. However, the range of the object to be measured that can be fixed by the existing image measuring instrument fixture is relatively narrow. For example, the utility model patent with the authorization announcement number CN210570484U discloses an auxiliary fixture for an image measuring instrument, including a base, a top plate, and a clamping device; the auxiliary fixture has a small clamping space range and can only clamp and fix regular objects to be measured, and has low applicability. Therefore, when a fixture cannot fix different objects to be measured, the corresponding fixture needs to be frequently replaced for different objects to be measured, and the applicability and flexibility are low; and all rely on manual operation, requiring the operator to judge according to the size, shape, material, etc. of the object to be measured, and select the appropriate fixture for combination use, which is cumbersome and inefficient. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems and provide an intelligent fixture for an image measuring instrument, which can clamp and fix objects of different shapes, sizes and materials, has high applicability and flexibility, and can realize automatic fixation of the objects to be measured, has a high degree of automation, is simple to operate and has higher efficiency; it keeps the objects to be measured stable, thereby ensuring the efficiency of the measurement work and the accuracy of the measurement results.

[0005] Another object of the present invention is to provide a clamping method of an intelligent fixture for an image measuring instrument.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] An intelligent fixture for an image measuring instrument comprises a clamping plate body, a plurality of automatic lifting devices and an edge profile detection module; wherein:

[0008] The clamping plate body is provided with a plurality of regularly arranged grooves, and each of the grooves is provided with an automatic lifting device; the automatic lifting device comprises a lifting fixing rod and a lifting driving mechanism for driving the lifting fixing rod to perform lifting motion;

[0009] The upper end of the lifting and fixing rod is provided with a telescopic pressing mechanism for pressing and fixing the object to be measured; wherein the telescopic pressing mechanism includes a pressing plate and a telescopic driving mechanism; there are multiple pressing plates, and the multiple pressing plates are distributed in a circle at the upper end of the lifting and fixing rod; the telescopic driving mechanism is used to drive the multiple pressing plates to synchronously extend outward or retract inward along the radial direction;

[0010] The edge contour detection module is used to detect and identify the edge of the object to be detected, and the edge contour detection module is connected to the lifting drive mechanism.

[0011] The working principle of the above-mentioned intelligent fixture for image measuring instrument is:

[0012] When working, first place the object to be measured of any shape, size and material on the upper surface of the splint body. At this time, the pressing plate of the telescopic pressing mechanism is in a retracted state, and the lifting and fixing rod is in a non-lifting state. Therefore, the telescopic pressing mechanism is located in the groove, and the top of the telescopic pressing mechanism is also flush with the upper surface of the splint body, so that the upper surface of the entire splint body is flat; then the edge contour detection module captures and detects the top viewing angle projection edge of the object to be measured; then the edge contour detection module transmits the captured and detected top viewing angle projection edge information to at least two automatic lifting devices with the shortest distance to the top viewing angle projection edge, and the automatic lifting device After the lifting drive mechanism receives the information, the lifting drive mechanism starts to work, drives the corresponding lifting and fixing rod to rise, and drives the telescopic pressing mechanism to rise together. When the telescopic pressing mechanism rises above the highest point of the object to be measured, the lifting drive mechanism stops working; then the telescopic driving mechanism in the raised telescopic pressing mechanism drives multiple pressing plates to extend outward at the same time, until the pressing plates extend to the edge of the top viewing angle projection of the object to be measured, and the telescopic driving mechanism stops driving; then the lifting drive mechanism drives the raised lifting and fixing rod to move downward, and drives the pressing plates extending outward to move downward at the same time. When the pressing plates touch the object to be measured, the lifting drive mechanism stops working. At this time, the pressing plates press and fix the object, and the image measuring instrument can measure the object to be measured; when the measurement work is completed, the lifting drive mechanism drives the lifting and fixing rod to rise until the pressing plates are no longer in contact with the object to be measured, and the telescopic driving mechanism drives multiple pressing plates to retract inward at the same time to take away the object to be measured; finally, the lifting drive mechanism drives the lifting and fixing rod to descend into the groove, and drives the telescopic pressing mechanism to descend into the groove, so that the upper surface of the splint body is in a flat plane state.

[0013] A preferred solution of the present invention, wherein the lifting drive mechanism includes a motor, a screw, a screw nut and a gear transmission mechanism; wherein the lower end of the screw is connected to the motor through the gear transmission mechanism; the screw is coaxially arranged with the lifting and fixing rod, and the lower end of the lifting and fixing rod is connected to the screw through the screw nut; and the edge contour detection module is connected to the motor. With the above structure, the power provided by the motor is transmitted through the gear transmission mechanism, driving the screw to rotate, and the rotation of the screw drives the screw nut to move along the axis direction of the screw, thereby driving the lifting and fixing rod to move; the lifting and fixing rod is controlled by controlling the forward and reverse rotation of the motor to control the rise and fall of the lifting and fixing rod; specifically, the edge contour detection module captures the detected top view projection edge information of the object to be measured and sends it to the motor, and the motor starts to operate after receiving the information, thereby realizing the rise of the lifting and fixing rod.

[0014] Preferably, the telescopic drive mechanism includes a rotary drive member rotatably connected to the upper end of the lifting and fixing rod; the lower end of the rotary drive member is provided with a plurality of drive grooves, the plurality of drive grooves are distributed along the circumferential direction, and the drive grooves correspond to the pressing plates one by one; the upper end of the pressing plate is provided with a protrusion that slides with the drive groove. In the above structure, the staff rotates the rotary drive member by hand, and under the action of the drive groove, all the protrusions slide on the drive groove, driving all the pressing plates to extend outward or retract inward synchronously.

[0015] Preferably, a base is provided at the upper end of the lifting and fixing rod, the rotating driving member is rotatably connected to the base, a radial guide assembly for guiding the pressing sheet to move in a radial direction is provided between the base and the pressing sheet, the radial guide assembly includes a plurality of radial guide grooves provided on the base and a guide block provided at the lower end of each pressing sheet and slidingly engaged with the radial guide groove; the guide block corresponds to the radial guide groove one by one. By providing the radial guide assembly, the pressing sheet can be guided to move in a radial direction, thereby ensuring the stability of the pressing sheet movement.

[0016] Furthermore, the driving groove is an arc groove, and the arc groove is eccentrically arranged relative to the rotation center of the rotating driving member, and the distance from one end of the arc groove to the rotation center of the rotating driving member is smaller than the distance from the other end to the rotation center of the rotating driving member. In the above structure, by driving the rotating driving member to rotate on the base, the arc groove on the rotating driving member also rotates around the rotation center of the rotating driving member. Due to the eccentric arrangement of the arc groove, there is a radial distance difference between the two ends of the arc groove and the rotation center of the rotating driving member. Under the action of the radial guide assembly, the arc groove drives the protrusion to slide on the arc groove, so that the pressing piece moves outward or retracts inward along the radial direction. Since the driving groove corresponds to the pressing piece one by one, and the guide block corresponds to the radial guide groove one by one, all the pressing pieces are driven to move outward or retract inward synchronously.

[0017] Preferably, the lifting and fixing rod is a multi-stage telescopic rod, including a basic rod, a first-stage telescopic rod and a second-stage telescopic rod, the basic rod, the first-stage telescopic rod and the second-stage telescopic rod are all hollow structures, the first-stage telescopic rod is sleeved inside the basic rod, and the second-stage telescopic rod is sleeved inside the first-stage telescopic rod; the lower end of the first-stage telescopic rod is connected to the screw rod through the screw rod nut, and the telescopic pressing mechanism is arranged at the upper end of the second-stage telescopic rod; a plurality of through grooves are vertically arranged on the side wall of the first-stage telescopic rod, and the plurality of through grooves are evenly distributed along the circumferential direction, wherein each through groove is provided with at least one chain transmission mechanism, and each of the chain transmission mechanisms includes an upper sprocket arranged at the upper end of the through groove, a lower sprocket arranged at the lower end of the through groove, and a transmission chain arranged between the upper sprocket and the lower sprocket; the upper end of the transmission chain is meshed with the upper sprocket, and the lower end is meshed with the lower sprocket; the upper end of the basic rod is connected to one side of the transmission chain, and the lower end of the second-stage telescopic rod is connected to the other side of the transmission chain. In the above structure, when the multi-stage telescopic rod rises, the power provided by the motor is transmitted through the gear transmission mechanism to drive the screw rod to rotate, and the rotation of the screw rod drives the screw rod nut to move along the axial direction of the screw rod, thereby driving the first telescopic rod to move upward inside the base rod. At the same time as the first telescopic rod moves upward, the chain transmission mechanism as a whole also moves upward. Since the upper end of the base rod is connected to one side of the transmission chain, the transmission chain will be pulled and move between the upper sprocket and the lower sprocket. The transmission chain close to the side of the base rod will move downward, and the transmission chain close to the side of the second-stage telescopic rod will move upward. Since the lower end of the second-stage telescopic rod is connected to the other side of the transmission chain, the upward moving transmission chain on this side will drive the second-stage telescopic rod to move upward, realizing the rising of the second-stage telescopic rod, thereby driving the telescopic pressing mechanism to move upward; when the multi-stage telescopic rod is descending, its principle is the same as the rising principle, and it can be achieved by controlling the motor to reverse.

[0018] Preferably, a photoelectric sensor is provided on the lifting and fixing rod, and the photoelectric sensor is connected to the motor. When the motor receives the edge information of the top viewing angle projection, the motor will drive the lifting and fixing rod to continue to rise until the photoelectric sensor on the lifting and fixing rod detects that the pressing sheet has exceeded the highest point of the object, and the photoelectric sensor transmits the information to the motor, the motor stops running, and the lifting and fixing rod stops moving.

[0019] Preferably, the intelligent clamp also includes a power module built into the clamp body, and the power module includes a battery, a power switch, a button switch, and a charging port; the battery provides power for the motor, the photoelectric sensor, and the edge contour detection module, and the power switch is used to control the power on and off of the motor, the photoelectric sensor, and the edge contour detection module; the charging port is used to charge the battery; and the button switch is used to control the start of the motor. By setting up the power module, the clamp body can provide power to various electrical components on the clamp body without an external power cord, and the start of the motor can be independently controlled by the button switch to achieve the rise and fall of the lifting and fixing rod, which is very convenient to use.

[0020] A clamping method for an intelligent fixture of an image measuring instrument comprises the following steps:

[0021] (1) The object to be measured is placed on the upper surface of the clamping plate body. At this time, the lifting and fixing rod is in a non-lifting state, and the top of the telescopic pressing mechanism on the lifting and fixing rod is flush with the upper surface of the clamping plate body;

[0022] (2) The edge contour detection module captures and detects the top perspective projection edge of the object being detected;

[0023] (3) the edge contour detection module transmits the captured and detected top view projection edge information to at least two automatic lifting devices that are shortest distances from the top view projection edge;

[0024] (4) After receiving the information, the lifting drive mechanism in the automatic lifting device starts to work, drives the corresponding lifting fixed rod to rise, and drives the telescopic pressing mechanism to rise together. When the pressing plate in the telescopic pressing mechanism rises above the highest point of the object to be measured, the lifting drive mechanism stops working;

[0025] (5) The telescopic driving mechanism in the raised telescopic pressing mechanism drives the multiple pressing plates to extend outward at the same time until the pressing plates extend to the edge of the top viewing angle projection of the object to be measured, and the telescopic driving mechanism stops driving;

[0026] (6) The lifting drive mechanism drives the raised lifting fixing rod to move downward, and at the same time drives the outwardly extending pressing plate to move downward. When the pressing plate touches the object to be measured, the lifting drive mechanism stops working, and the pressing plate clamps the object to be measured on the clamping plate body.

[0027] Preferably, after step (6), the method further comprises the following steps:

[0028] The image measuring instrument measures the object to be measured that is clamped and fixed on the clamp body; after the measurement is completed, the lifting drive mechanism drives the raised lifting and fixing rod to rise until the pressure plate is no longer in contact with the object to be measured, and the telescopic drive mechanism drives multiple pressure plates to retract inward at the same time to remove the object to be measured; the lifting drive mechanism drives the lifting and fixing rod to descend into the groove, and at the same time drives the telescopic pressure plate mechanism to descend into the groove, so that the upper surface of the clamp body is in a flat plane state. In the above steps, after the measurement is completed, all the raised automatic lifting devices and telescopic pressure plate mechanisms are reset, so that the intelligent fixture returns to its original state and waits for the next fixation of the object to be measured.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The intelligent clamp of the present invention is provided with a plurality of automatic lifting devices, and the plurality of automatic lifting devices are arranged in a regular pattern, and an edge contour detection module is used to identify the edge contour of the top viewing angle of the object to be measured, and the automatic lifting device closest to the edge of the object to be measured is started, and the corresponding lifting and fixing rod is driven to rise by the lifting driving mechanism in the automatic lifting device, and the telescopic pressing mechanism is driven to rise together, and then the telescopic driving mechanism in the telescopic pressing mechanism drives a plurality of pressing plates to extend outward at the same time, and the lifting driving mechanism drives the raised lifting and fixing rod to move downward, and drives the pressing plates extending outward to move downward to press and fix the object to be measured, and the intelligent clamp has a high degree of automation, simple operation and higher efficiency; during measurement, the object to be measured can be kept stable, thereby ensuring the high efficiency of the measurement work and the accuracy of the measurement results.

[0031] 2. The intelligent fixture of the present invention can identify objects of different shapes, sizes and materials through edge contour detection technology, and can clamp and fix objects of different shapes, sizes and materials by using multiple automatic lifting devices in conjunction with a telescopic pressing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of a first specific implementation manner of an intelligent fixture for an image measuring instrument in the present invention.

[0033] Figure 2 The three-dimensional structural schematic diagram of the intelligent clamp of the present invention omits several automatic lifting devices and telescopic pressing mechanisms.

[0034] Figure 3 Schematic diagram of the internal structure of the intelligent clamp in the present invention.

[0035] Figure 4It is a three-dimensional structural schematic diagram of the intelligent clamp in the present invention in a working state.

[0036] Figure 5 It is a front view of the automatic lifting device and the telescopic pressing mechanism in the present invention.

[0037] Figure 6 The three-dimensional structural diagram of the telescopic pressing mechanism and the automatic lifting device in the present invention without the motor.

[0038] Figure 7 It is a schematic diagram of the internal structure of the partial structure of the automatic lifting device and the telescopic pressing mechanism in the present invention.

[0039] Figure 8 It is a structural schematic diagram of the telescopic pressing mechanism in the present invention when the pressing piece is in an extended state.

[0040] Fig. 9 It is a schematic diagram of the three-dimensional structure of the rotary driving member in the present invention.

[0041] Fig.10 It is a top view of the base in the present invention.

[0042] Fig.11 It is a schematic diagram of the structure of the tablet in the present invention.

[0043] Fig.12 It is a partial schematic diagram of the internal structure of the telescopic pressing mechanism in the present invention.

[0044] Fig.13 It is a structural schematic diagram of another specific implementation manner of the lifting drive mechanism in the present invention. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0046] Example 1

[0047] See also Figure 1-Figure 4 This embodiment discloses an intelligent fixture for an image measuring instrument, including a clamping plate body 1, a plurality of automatic lifting devices 2 and an edge contour detection module 3.

[0048] See also Figure 1-Figure 8The splint body 1 is provided with a plurality of grooves 9 which are arranged regularly and open upward, and each of the grooves 9 is provided with an automatic lifting device 2; each of the automatic lifting devices 2 includes a lifting and fixing rod 2-1 and a lifting and fixing mechanism 2-2 for driving the lifting and fixing rod 2-1 to perform lifting and lowering movements; the plurality of grooves 9 are divided into 9 rows, wherein each of the odd rows has 7 grooves 9, and each of the even rows has 6 grooves 9, and the grooves 9 in the odd rows are staggered with the grooves 9 in the even rows, so that the grooves 9 can cover the entire splint body 1, so as to adapt to the measured objects 11 of different shapes, sizes and materials.

[0049] See also Figure 1-Figure 8 , the upper end of each of the lifting and fixing rods 2-1 is provided with a telescopic pressing mechanism 4 for pressing and fixing the object to be measured 11; wherein the telescopic pressing mechanism 4 includes a pressing plate 4-1 and a telescopic driving mechanism 4-2; there are multiple pressing plates 4-1, and multiple pressing plates 4-1 are distributed in a circle at the upper end of the lifting and fixing rod 2-1; the telescopic driving mechanism 4-2 is used to drive multiple pressing plates 4-1 to perform synchronous outward extension or synchronous inward retraction movements along the radial direction; when the lifting and fixing rod 2-1 is not performing a lifting movement, the telescopic pressing mechanism 4 on the lifting and fixing rod 2-1 is flush with the upper surface of the splint body 1, the purpose of which is that when the object to be measured 11 is placed on the splint body 1, the surface of the splint body 1 remains flush, so that the object to be measured 11 can be placed more stably.

[0050] See also Figure 3 The edge contour detection module 3 is built into the clamp body 1, and is used to detect the edge of the object 11 to be measured and perform identification processing. The edge contour detection module 3 is connected to the lifting drive mechanism 2-2 and is used to start the lifting drive mechanism 2-2; specifically, the edge contour detection module 3 can be communicatively connected with the lifting drive mechanism 2-2.

[0051] See also Figure 3-Figure 8The lifting drive mechanism 2-2 includes a motor 2-21, a screw rod 2-22, a screw nut 2-23 and a gear transmission mechanism; wherein the lower end of the screw rod 2-22 is connected to the motor 2-21 through the gear transmission mechanism; the screw rod 2-22 is coaxially arranged with the lifting and fixing rod 2-1, and the lower end of the lifting and fixing rod 2-1 is connected to the screw rod 2-22 through the screw nut 2-23; the edge contour detection module 3 is connected to the motor 2-21 wirelessly or wired for starting the motor 2-21. With the above structure, the power provided by the motor 2-21 is transmitted through the gear transmission mechanism, driving the screw 2-22 to rotate. The rotation of the screw 2-22 drives the screw nut 2-23 to move along the axial direction of the screw 2-22, thereby driving the lifting and lowering movement of the lifting and fixing rod 2-1; the lifting and fixing rod 2-1 is controlled by controlling the forward and reverse rotation of the motor 2-21; specifically, the edge contour detection module 3 captures the detected top perspective projection edge information of the object to be measured 11 and sends it to the motor 2-21. The motor 2-21 receives the information and starts to operate to realize the lifting and fixing rod 2-1. For objects 11 of different heights, the lifting and fixing rod 2-1 has different lifting heights.

[0052] See also Figure 3-Figure 8 The gear transmission mechanism includes a driving gear 2-24, a first transmission gear 2-25, a second transmission gear 2-26 and a driven gear 2-27; the driving gear 2-24 is connected to the motor 2-21, the first transmission gear 2-25 and the second transmission gear 2-26 are coaxially arranged, the driving gear 2-24 is meshed with the first transmission gear 2-25, the second transmission gear 2-26 is meshed with the driven gear 2-27, and the driven gear 2-27 is coaxially arranged with the screw rod 2-22. The above structure drives the driving gear 2-24 to rotate through the motor 2-21, thereby driving the first transmission gear 2-25 to rotate, and then drives the second transmission gear 2-26, and then drives the driven gear 2-27, and finally drives the screw rod 2-22 for transmission.

[0053] See also Figure 3-Figure 12The telescopic drive mechanism 4-2 includes a rotary drive member 4-21 rotatably connected to the upper end of the lifting and fixing rod 2-1; a plurality of drive grooves 4-22 are provided at the lower end of the rotary drive member 4-21, and the plurality of drive grooves 4-22 are distributed along the circumferential direction, and the drive grooves 4-22 correspond to the pressing plate 4-1 one by one; a protrusion 4-3 that slides with the drive groove 4-22 is provided at the upper end of the pressing plate 4-1. In the above structure, the staff rotates the rotary drive member 4-21 by hand, and under the action of the drive groove 4-22, all the protrusions 4-3 slide on the drive groove 4-22, driving all the pressing plates 4-1 to extend outward or retract inward synchronously.

[0054] See also Figure 3-Figure 12 The upper end of the lifting and fixing rod 2-1 is provided with a base 4-4, the rotating driving member 4-21 is rotatably connected to the base 4-4, and a radial guide assembly for guiding the pressing sheet 4-1 to move along the radial direction is provided between the base 4-4 and the pressing sheet 4-1, and the radial guide assembly includes a plurality of radial guide grooves 4-5 provided on the base 4-4 and a guide block 4-6 provided at the lower end of each pressing sheet 4-1 and slidingly matched with the radial guide groove 4-5; the guide block 4-6 corresponds to the radial guide groove 4-5 one by one. By providing the radial guide assembly, the pressing sheet 4-1 can be guided to move in the radial direction, thereby ensuring the stability of the movement of the pressing sheet 4-1.

[0055] See also Fig. 9 , the driving groove 4-22 is an arc groove, the arc groove is eccentrically arranged relative to the rotation center of the rotating driving member 4-21, and the distance from one end of the arc groove to the rotation center of the rotating driving member 4-21 is smaller than the distance from the other end to the rotation center of the rotating driving member 4-21. In the above structure, by driving the rotating driving member 4-21 to rotate on the base 4-4, the arc groove on the rotating driving member 4-21 also rotates around the rotation center of the rotating driving member 4-21. Due to the eccentric arrangement of the arc groove, there is a radial distance difference between the two ends of the arc groove and the rotation center of the rotating driving member 4-21. Under the action of the radial guide assembly, the arc groove drives the protrusion 4-3 to slide on the arc groove, so that the pressing piece 4-1 moves outward or retracts inward along the radial direction. Since the driving groove 4-22 corresponds to the pressing piece 4-1 one by one, and the guide block 4-6 corresponds to the radial guide groove 4-5 one by one, all the pressing pieces 4-1 are driven to move outward or retract inward synchronously.

[0056] See also Figure 5-Figure 8 A motor can be provided on the rotating driving member 4-21, and the rotating driving member 4-21 can be driven to rotate by the motor, thereby further realizing the automatic clamping and fixing of the measured object 11 by the intelligent fixture.

[0057] See also Figure 5-Figure 8 In this embodiment, as viewed from the top view, the rotary drive member 4-21 is rotated clockwise to extend the pressing plate 4-1, and the rotary drive member 4-21 is rotated counterclockwise to retract the pressing plate 4-1.

[0058] See also Figure 5-Figure 8 The lifting and fixing rod 2-1 is a multi-stage telescopic rod, including a basic rod 2-11, a first-stage telescopic rod 2-12 and a second-stage telescopic rod 2-13. The basic rod 2-11, the first-stage telescopic rod 2-12 and the second-stage telescopic rod 2-13 are all hollow structures. The first-stage telescopic rod 2-12 is sleeved inside the basic rod 2-11, and the second-stage telescopic rod 2-13 is sleeved inside the first-stage telescopic rod 2-12; the lower end of the first-stage telescopic rod 2-12 is connected to the screw rod 2-22 through the screw rod nut 2-23, and the telescopic pressing mechanism 4 is arranged at the upper end of the second-stage telescopic rod 2-13; the first-stage telescopic rod 2-1 2 is vertically provided with a plurality of through grooves 2-121, and the plurality of through grooves 2-121 are evenly distributed along the circumferential direction, wherein each through groove 2-121 is provided with at least one chain transmission mechanism, and each of the chain transmission mechanisms comprises an upper sprocket 5 arranged at the upper end of the through groove 2-121, a lower sprocket 6 arranged at the lower end of the through groove 2-121, and a transmission chain 7 arranged between the upper sprocket 5 and the lower sprocket 6; the upper end of the transmission chain 7 is meshed with the upper sprocket 5, and the lower end is meshed with the lower sprocket 6; the upper end of the base rod 2-11 is connected to one side of the transmission chain 7, and the lower end of the second-stage telescopic rod 2-13 is connected to the other side of the transmission chain 7. In the above structure, when the multi-stage telescopic rod rises, the power provided by the motor 2-21 is transmitted through the gear transmission mechanism, driving the screw rod 2-22 to rotate. The rotation of the screw rod 2-22 drives the screw nut 2-23 to move along the axial direction of the screw rod 2-22, thereby driving the first telescopic rod to move upward inside the base rod 2-11. At the same time as the first telescopic rod moves upward, the chain transmission mechanism as a whole also moves upward. Since the upper end of the base rod 2-11 is connected to one side of the transmission chain 7, the transmission chain 7 will be pulled, and the upper sprocket 5 and the lower chain 5 will move upward. When the wheels 6 move, the transmission chain 7 on the side close to the base rod 2-11 will move downward, and the transmission chain 7 on the side close to the second-stage telescopic rod 2-13 will move upward. Since the lower end of the second-stage telescopic rod 2-13 is connected to the other side of the transmission chain 7, the upward-moving transmission chain 7 on this side will drive the second-stage telescopic rod 2-13 to move upward, thereby realizing the ascent of the second-stage telescopic rod 2-13, thereby driving the telescopic pressing mechanism 4 to move upward. When the multi-stage telescopic rod is descending, its principle is the same as the ascent principle, which can be achieved by controlling the motor 2-21 to reverse.

[0059] The base rod 2-11, as a fixed component, can be fixed on the inner wall of the groove 9, and the motor 2-21 can also be fixed on the bottom of the groove 9 or on the base rod 2-11.

[0060] See also Figure 5-Figure 8 In this embodiment, two chain transmission mechanisms are provided on each through slot 2-121, the two chain transmission mechanisms are arranged in parallel, and the upper sprockets 5 in the two chain transmission mechanisms are coaxially arranged, and the lower sprockets 6 are also coaxially arranged.

[0061] See also Figure 5-Figure 8 The base 4-4 is arranged at the upper end of the second-stage telescopic rod 2-13, and the lower end of the base 4-4 is directly connected to the upper end of the second-stage telescopic rod 2-13.

[0062] See also Figure 5-Figure 8 The upper end of the base rod 2-11 and the lower end of the second-stage telescopic rod 2-13 are both provided with a fixing component 12, and the fixing component 12 is connected to the transmission chain 7. In this embodiment, the fixing component 12 is a fixing tooth, and the fixing tooth is connected with the transmission chain 7. In addition, the fixing component 12 can also be a fixing block, and the fixing block is directly fixedly connected to the transmission chain 7. By setting the above mechanism, the second-stage telescopic rod 2-13 can move upward, and through the transmission of the transmission chain 7, the second-stage telescopic rod 2-13 can be driven to move upward, and multi-stage movement can be achieved through one power source, and the structure is more compact.

[0063] See also Figure 1-Figure 8 The lifting and fixing rod 2-1 is provided with a photoelectric sensor, and the photoelectric sensor is connected to the motor 2-21 by wire or wireless. When the motor 2-21 receives the edge information of the top viewing angle projection, the motor 2-21 will drive the lifting and fixing rod 2-1 to continue to rise until the photoelectric sensor on the lifting and fixing rod 2-1 detects that the pressing sheet 4-1 has exceeded the highest point of the object. The photoelectric sensor transmits the information to the motor 2-21, the motor 2-21 stops running, and the lifting and fixing rod 2-1 stops moving.

[0064] See also Figure 1-Figure 4, the intelligent clamp also includes a power module 8 built into the clamp body 1, the power module 8 includes a battery (not shown in the figure), a power switch 8-1, a button switch 8-2 ​​and a charging port 8-3; the battery provides power for the motor 2-21, the photoelectric sensor and the edge contour detection module 3, the battery is built into the clamp body 1, the power switch 8-1 is used to control the power on and off of the motor 2-21, the photoelectric sensor and the edge contour detection module 3, and is the main control switch; the charging interface is used to charge the battery; the button switch 8-2 ​​is used to control the start of the motor 2-21. By setting the power module 8, the clamp body 1 can provide power to each electrical component on the clamp body 1 without an external power cord, and the start of the motor 2-21 can be independently controlled by the button switch 8-2 ​​to realize the rise and fall of the lifting and fixing rod 2-1, which is very convenient to use.

[0065] See also Figure 1-Figure 4 The two sides of the splint body 1 are provided with taking grooves 10, and the taking grooves 10 are provided to facilitate taking the splint body 1.

[0066] The edge contour detection module 3 includes an edge contour detection sensor.

[0067] See also Figure 1-Figure 9 The horizontal cross section of the groove 9 is a regular dodecagon, and correspondingly, the horizontal cross sections of the rotating drive member 4-21 and the base 4-4 are also regular dodecagons. The horizontal cross section of the groove 9 can also be circular, and correspondingly, the horizontal cross sections of the rotating drive member 4-21 and the base 4-4 are also circular.

[0068] See also Figure 1-Figure 8 , the working principle of the above-mentioned intelligent fixture for image measuring instrument is:

[0069] During operation, first place the object 11 to be measured of any shape, size and material on the upper surface of the splint body 1. At this time, the pressure plate 4-1 of the telescopic pressure plate mechanism 4 is in a retracted state, and the lifting and fixing rod 2-1 is in a non-lifting state. Therefore, the telescopic pressure plate mechanism 4 is located in the groove 9, and the top of the telescopic pressure plate mechanism 4 is also flush with the upper surface of the splint body 1, so that the upper surface of the entire splint body 1 is flat; then turn on the power switch 8-1, the intelligent clamp starts to work, and the edge contour detection module 3 captures and detects the top viewing angle projection edge of the object to be measured 11. The top viewing angle projection edge is the edge contour of the object to be measured projected in the direction of the top viewing angle; then the edge contour detection module 3 transmits the captured and detected top viewing angle projection edge information to 2-5 automatic lifting devices with the shortest distance to the top viewing angle projection edge. In position 2, after the lifting drive mechanism 2-2 in the automatic lifting device 2 receives the information, the lifting drive mechanism 2-2 starts to work, drives the corresponding lifting and fixing rod 2-1 to rise, and drives the telescopic pressing mechanism 4 to rise together. When the telescopic pressing mechanism 4 rises above the highest point of the object to be measured 11, the lifting drive mechanism 2-2 stops working; then the telescopic drive mechanism 4-2 in the raised telescopic pressing mechanism 4 drives multiple pressing plates 4-1 to extend outward at the same time, until the pressing plates 4-1 extend to the edge of the top viewing angle projection of the object to be measured 11, and the telescopic drive mechanism 4-2 stops driving; then the lifting drive mechanism 2-2 drives the raised lifting and fixing rod 2-1 to move downward, and at the same time drives the protruding pressing plate 4-1 to move downward. When the pressing plate 4-1 touches the object to be measured 11, the lifting drive mechanism 2-2 stops working. At this time, the pressing plate 4-1 presses and fixes the object, and the image measuring instrument can measure the object 11 to be measured; when the measurement work is completed, the lifting drive mechanism 2-2 drives the lifting and fixing rod 2-1 to rise until the pressing plate 4-1 has no contact with the object 11 to be measured, and the telescopic driving mechanism 4-2 drives multiple pressing plates 4-1 to retract inward at the same time to remove the object 11 to be measured; finally, the lifting drive mechanism 2-2 drives the lifting and fixing rod 2-1 to descend into the groove 9, and at the same time drives the telescopic pressing plate mechanism 4 to descend into the groove 9, so that the upper surface of the splint body 1 is in a flat plane state.

[0070] In this embodiment, the intelligent fixture can be used to clamp and fix objects of different shapes, sizes, and materials. After fixing the object 11 to be measured, the intelligent fixture is installed on the measuring table of the image measuring instrument, and the image measuring instrument can measure the object 11 to be measured, thereby solving the technical problem that the existing image measuring instrument is prone to deviation and unstable state, thereby affecting the measurement results. At the same time, it also solves the technical problem that the existing fixture cannot fix different objects to be measured and the operation is cumbersome.

[0071] Example 2

[0072] See also Fig.13The specific structure of this embodiment is the same as that of embodiment 1, except that the lifting and fixing rod 2-1 is a multi-stage telescopic rod, including a basic rod 2-11, a first-stage telescopic rod 2-12, a second-stage telescopic rod 2-13, a third-stage telescopic rod 2-14 and a fourth-stage telescopic rod 2-15. The basic rod 2-11, the first-stage telescopic rod 2-12, the second-stage telescopic rod 2-13, the third-stage telescopic rod 2-14 and the fourth-stage telescopic rod 2-15 are all hollow structures. The first-stage telescopic rod 2-12 is sleeved inside the basic rod 2-11, and the second-stage telescopic rod 2-13 is sleeved inside the first-stage telescopic rod 2-12; the third-stage telescopic rod 2-14 is sleeved inside the second-stage telescopic rod 2-13; the fourth-stage telescopic rod 2-15 is sleeved inside the second-stage telescopic rod 2-13; the fourth-stage telescopic rod 2-15 is sleeved inside the third-stage telescopic rod 2-14. -15 is sleeved inside the third-stage telescopic rod 2-14; the screw rod 2-22 is connected to the first-stage telescopic rod 2-12 through the screw rod nut 2-23; a motor 2-16 and a screw rod transmission assembly 2-17 are arranged between the second-stage telescopic rod 2-13 and the first-stage telescopic rod 2-12, between the third-stage telescopic rod 2-14 and the second-stage telescopic rod 2-13, and between the fourth-stage telescopic rod 2-15 and the third-stage telescopic rod 2-14. By combining the motor and the screw rod transmission assembly 2-17, the second-stage telescopic rod 2-13 can move on the first-stage telescopic rod 2-12, the third-stage telescopic rod 2-14 can move on the second-stage telescopic rod 2-13, and the fourth-stage telescopic rod 2-15 can move on the third-stage telescopic rod 2-14. Each telescopic rod can be controlled independently, with a long telescopic distance and flexible control.

[0073] Example 3

[0074] See also Figure 1-Figure 13 This embodiment discloses a clamping method for an intelligent fixture of an image measuring instrument as described in Embodiment 1 or Embodiment 2, which comprises the following steps:

[0075] (1) The object 11 to be tested is placed on the upper surface of the clamping plate body 1. At this time, the lifting and fixing rod 2-1 is in a non-lifting state, and the top of the telescopic pressing mechanism 4 on the lifting and fixing rod 2-1 is flush with the upper surface of the clamping plate body 1;

[0076] (2) The edge contour detection module 3 captures and detects the top perspective projection edge of the object 11 to be detected;

[0077] (3) The edge contour detection module 3 transmits the captured and detected top view projection edge information to at least two automatic lifting devices 2 that are shortest in distance from the top view projection edge;

[0078] (4) After receiving the information, the lifting drive mechanism 2-2 in the automatic lifting device 2 starts to work, drives the corresponding lifting fixed rod 2-1 to rise, and drives the telescopic pressing mechanism 4 to rise together. When the pressing plate 4-1 in the telescopic pressing mechanism 4 rises above the highest point of the object 11 to be measured, the lifting drive mechanism 2-2 stops working;

[0079] (5) The telescopic driving mechanism 4-2 in the raised telescopic pressing mechanism 4 drives the multiple pressing plates 4-1 to extend outward at the same time until the pressing plates 4-1 extend to the edge of the top viewing angle projection of the object to be measured 11, and the telescopic driving mechanism 4-2 stops driving;

[0080] (6) The lifting drive mechanism 2-2 drives the raised lifting fixing rod 2-1 to move downward, and at the same time drives the outwardly extending pressing plate 4-1 to move downward. When the pressing plate 4-1 touches the object to be measured 11, the lifting drive mechanism 2-2 stops working, and the pressing plate 4-1 clamps the object to be measured 11 on the clamping plate body 1;

[0081] (7) The image measuring instrument measures the object 11 clamped and fixed on the clamping plate body 1; after the measurement is completed, the lifting drive mechanism 2-2 drives the raised lifting and fixing rod 2-1 to rise until the pressing plate 4-1 is out of contact with the object 11, and the telescopic drive mechanism 4-2 drives the multiple pressing plates 4-1 to retract inward at the same time to remove the object 11;

[0082] (8) The lifting drive mechanism 2-2 drives the lifting fixing rod 2-1 to descend into the groove 9, and at the same time drives the telescopic pressing mechanism 4 to descend into the groove 9, so that the upper surface of the clamping plate body 1 is in a flat plane state.

[0083] See also Figure 1-Figure 8 In the above steps (3) and (4), the larger the top viewing angle projection area of ​​the object to be detected, the more the lifting and fixing rods 2-1 are raised. In the above steps (7) to (8), after the measurement is completed, all the raised automatic lifting devices 2 and telescopic pressing mechanisms 4 are reset, so that the intelligent fixture is restored to its original state and waits for the next fixation of the object to be detected 11.

[0084] See also Figure 1-Figure 8 In step (1), the top of the rotating driving member 4 - 21 in the telescopic pressing mechanism 4 is flush with the upper surface of the splint body 1 .

[0085] See also Figure 1-Figure 8 In step (2), first turn on the power switch 8-1 to power on the motor 2-21, the photoelectric sensor and the edge contour detection module 3, and then the edge contour detection module 3 captures and detects the top perspective projection edge of the object 11 to be detected.

[0086] See also Figure 1-Figure 8In step (3), the edge contour detection module 3 transmits the captured and detected top viewing angle projection edge information to the automatic lifting device 2 which is not blocked by the object 11 and is shortest from the top viewing angle projection edge.

[0087] See also Figure 1-Figure 8 In step (4), the motor 2-21 in the lifting drive mechanism 2-2 receives the top viewing angle projection edge information. After receiving the information, the motor 2-21 starts to work, drives the corresponding lifting fixed rod 2-1 to rise, and drives the telescopic pressing mechanism 4 to rise together. When the photoelectric sensor detects that the pressing plate 4-1 in the telescopic pressing mechanism 4 rises above the highest point of the object 11 to be measured, the photoelectric sensor transmits the information to the motor 2-21, and the motor 2-21 stops running.

[0088] See also Figure 1-Figure 8 In step (5), manually turn the rotary drive member 4-21 to drive the multiple retracted pressing plates 4-1 to extend outward at the same time until the pressing plates 4-1 extend to the edge of the top viewing angle projection of the object 11 to be measured. When the pressing plates 4-1 reach a position sufficient to press the object 11 to be measured, stop turning the rotary drive member 4-21; perform this step for all the raised telescopic pressing plates 4 respectively.

[0089] See also Figure 1-Figure 8 In step (6), the button switch 8-2 ​​is pressed, and the motor 2-21 drives the raised lifting and fixing rod 2-1 to move downward, and at the same time drives the outwardly extending pressing plate 4-1 to move downward. When the pressing plate 4-1 touches the object to be measured 11, a signal is transmitted to the motor 2-21, and the motor 2-21 stops working, and the pressing plate 4-1 clamps the object to be measured 11 on the clamping plate body 1.

[0090] See also Figure 1-Figure 8 In step (7), after the measurement work is completed, the button switch 8-2 ​​is pressed, and the motor 2-21 drives the raised lifting and fixing rod 2-1 to rise until the pressing plate 4-1 is no longer in contact with the object 11 to be measured, and the rotating driving member 4-21 is turned, and the multiple pressing plates 4-1 are retracted inward at the same time, and the object 11 to be measured is removed;

[0091] See also Figure 1-Figure 8 In step (8), the button switch 8-2 ​​is pressed again, and the motor 2-21 drives the lifting and fixing rod 2-1 to descend into the groove 9, and at the same time drives the telescopic pressing mechanism 4 to descend into the groove 9, so that the upper surface of the splint body 1 is in a flat plane state, and the intelligent clamp returns to its original state.

[0092] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An intelligent fixture for an image measuring instrument, characterized in that: It includes a clamping plate body, multiple automatic lifting devices and an edge profile detection module; wherein, The clamping plate body is provided with a plurality of regularly arranged grooves, and each of the grooves is provided with an automatic lifting device; the automatic lifting device comprises a lifting fixing rod and a lifting driving mechanism for driving the lifting fixing rod to perform lifting motion; The upper end of the lifting and fixing rod is provided with a telescopic pressing mechanism for pressing and fixing the object to be measured; wherein the telescopic pressing mechanism includes a pressing plate and a telescopic driving mechanism; there are multiple pressing plates, and the multiple pressing plates are distributed in a circle at the upper end of the lifting and fixing rod; the telescopic driving mechanism is used to drive the multiple pressing plates to synchronously extend outward or retract inward along the radial direction; The edge contour detection module is used to detect and identify the edge of the object to be detected, and the edge contour detection module is connected to the lifting drive mechanism; The lifting drive mechanism includes a motor, a screw rod, a screw rod nut and a gear transmission mechanism; wherein the lower end of the screw rod is connected to the motor through the gear transmission mechanism; the screw rod is coaxially arranged with the lifting and fixing rod, and the lower end of the lifting and fixing rod is connected to the screw rod through the screw rod nut; the edge contour detection module is connected to the motor; The telescopic driving mechanism comprises a rotary driving member rotatably connected to the upper end of the lifting and fixing rod; a plurality of driving grooves are provided at the lower end of the rotary driving member, the plurality of driving grooves are distributed along the circumferential direction, and the driving grooves correspond to the pressing plates one by one; a protrusion is provided at the upper end of the pressing plate to slide with the driving groove; A base is provided at the upper end of the lifting and fixing rod, the rotating driving member is rotatably connected to the base, a radial guide assembly for guiding the pressing sheet to move along the radial direction is provided between the base and the pressing sheet, the radial guide assembly includes a plurality of radial guide grooves provided on the base and a guide block provided at the lower end of each pressing sheet and slidably matched with the radial guide groove; the guide block corresponds to the radial guide groove one by one; The lifting and fixing rod is a multi-stage telescopic rod, including a basic rod, a first-stage telescopic rod and a second-stage telescopic rod, the basic rod, the first-stage telescopic rod and the second-stage telescopic rod are all hollow structures, the first-stage telescopic rod is sleeved inside the basic rod, and the second-stage telescopic rod is sleeved inside the first-stage telescopic rod; the lower end of the first-stage telescopic rod is connected to the screw rod through the screw rod nut, and the telescopic pressing mechanism is arranged at the upper end of the second-stage telescopic rod; a plurality of through grooves are vertically arranged on the side wall of the first-stage telescopic rod, and the plurality of through grooves are evenly distributed along the circumferential direction, wherein each through groove is provided with at least one chain transmission mechanism, and each of the chain transmission mechanisms includes an upper sprocket arranged at the upper end of the through groove, a lower sprocket arranged at the lower end of the through groove, and a transmission chain arranged between the upper sprocket and the lower sprocket; the upper end of the transmission chain is meshed with the upper sprocket, and the lower end is meshed with the lower sprocket; the upper end of the basic rod is connected to one side of the transmission chain, and the lower end of the second-stage telescopic rod is connected to the other side of the transmission chain.

2. The intelligent fixture for an image measuring instrument according to claim 1, characterized in that: The driving groove is an arc groove, which is eccentrically arranged relative to the rotation center of the rotating driving member, and the distance from one end of the arc groove to the rotation center of the rotating driving member is smaller than the distance from the other end to the rotation center of the rotating driving member.

3. The intelligent fixture for an image measuring instrument according to claim 1, characterized in that: A photoelectric sensor is provided on the lifting and fixing rod, and the photoelectric sensor is connected to the motor.

4. The intelligent fixture for an image measuring instrument according to claim 3, characterized in that: The intelligent clamp also includes a power module built into the clamp body, and the power module includes a battery, a power switch, a button switch and a charging port; the battery provides power for the motor, the photoelectric sensor and the edge contour detection module, and the power switch is used to control the power on and off of the motor, the photoelectric sensor and the edge contour detection module; the charging port is used to charge the battery; and the button switch is used to control the start of the motor.

5. A method for clamping an intelligent fixture for an image measuring instrument, characterized in that: The clamping method is applied in the intelligent clamp as claimed in any one of claims 2 to 4, and the clamping method comprises the following steps: (1) The object to be measured is placed on the upper surface of the clamping plate body. At this time, the lifting and fixing rod is in a non-lifting state, and the top of the telescopic pressing mechanism on the lifting and fixing rod is flush with the upper surface of the clamping plate body; (2) The edge contour detection module captures and detects the top perspective projection edge of the object being detected; (3) The edge contour detection module transmits the captured and detected top view projection edge information to at least two automatic lifting devices that are shortest distances from the top view projection edge; (4) After receiving the information, the lifting drive mechanism in the automatic lifting device starts to work, drives the corresponding lifting fixed rod to rise, and drives the telescopic pressing mechanism to rise together. When the pressing plate in the telescopic pressing mechanism rises above the highest point of the object to be measured, the lifting drive mechanism stops working; (5) The telescopic driving mechanism in the raised telescopic pressing mechanism drives the multiple pressing plates to extend outward at the same time until the pressing plates extend to the edge of the top viewing angle projection of the object to be measured, and the telescopic driving mechanism stops driving; (6) The lifting drive mechanism drives the raised lifting fixing rod to move downward, and at the same time drives the outwardly extended pressing plate to move downward. When the pressing plate touches the object to be measured, the lifting drive mechanism stops working, and the pressing plate clamps the object to be measured on the clamping plate body.

6. The clamping method of the intelligent fixture for the image measuring instrument according to claim 5, characterized in that: After step (6), the following steps are also included: The image measuring instrument measures the object to be measured that is clamped and fixed on the clamping plate body; after the measurement work is completed, the lifting drive mechanism drives the raised lifting and fixing rod to rise until the pressing plate is out of contact with the object to be measured, and the telescopic driving mechanism drives multiple pressing plates to retract inward at the same time to remove the object to be measured; the lifting drive mechanism drives the lifting and fixing rod to descend into the groove, and at the same time drives the telescopic pressing plate mechanism to descend into the groove, so that the upper surface of the clamping plate body is in a flat plane state.

Images