Device for measuring multiple internal characteristics of long-axis part

Abstract

The utility model belongs to the technical field of part measurement, and particularly relates to a device for measuring various internal characteristics of a long-axis part, which comprises a rack, a granite base platform, a product movement platform and a measuring assembly, and is characterized in that the granite base platform is fixedly connected with the top of the rack; the product motion platform and the measuring assembly are both arranged at the top of the granite base platform, the top of the granite base platform is fixedly connected with a display supporting rod through a first inner hexagonal screw, and one side of the display supporting rod is fixedly connected with a computer display through a second inner hexagonal screw. The detection device is simple in structure and high in overall reliability. The production process of the materials is reasonable, and the overall cost is low. Other detection means cannot detect or the detection difficulty is too large, and the device is high in measurement precision and convenient to use. The method is not influenced by human factors, and the measured data is high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of parts measurement, in particular to a device for measuring multiple internal features of a long-axis part. Background Art

[0002] Engineering machinery is an important part of the equipment industry. Generally speaking, all mechanical equipment required for earthwork construction, road construction and maintenance, mobile lifting and loading and unloading operations, and comprehensive mechanized construction projects required for various construction projects are called engineering machinery, and long-axis parts are an important part of engineering machinery.

[0003] However, existing technologies have been unable to accurately measure the internal features of long shaft parts. For example, internal diameter measurement is limited by its limited detection methods and lacks control over measurement accuracy. For example, an internal micrometer, for example, has a maximum detection length of less than 3 meters, and due to its long extension, it is subject to significant human influence. Consequently, measurement results lack consistency and accuracy, and detection time is excessively long. Other internal features are even more difficult to detect, or even impossible to detect. Utility Model Content

[0004] The purpose of the present invention is to solve the problem in the market that it is impossible to measure the internal features of long shaft parts raised in the above background technology, and to propose a device for measuring multiple internal features of long shaft parts.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A device for measuring multiple internal features of a long shaft part, comprising a frame, a granite base platform, a product motion platform, and a measuring assembly. The granite base platform is fixedly connected to the top of the frame, the product motion platform and the measuring assembly are both arranged on the top of the granite base platform, the top of the granite base platform is fixedly connected to a display support rod via a first hexagon socket screw, and a computer monitor is fixedly connected to one side of the display support rod via a second hexagon socket screw.

[0007] The product motion platform includes a linear guide, a product carrying platform, a servo motor and a product under test, the linear guide is fixedly connected to the top of the granite base platform by a third hexagon socket screw, a linear guide slider is slidably connected to the linear guide, the product carrying platform is fixedly connected to the top of the linear guide slider by a fourth hexagon socket screw, the product under test is horizontally arranged above the product carrying platform, the servo motor is fixedly connected to the top of the granite base platform, the output end of the servo motor is connected to a ball screw through a flexible coupling, a double-row angular contact ball bearing is connected to the ball screw through a screw locking nut, a screw bearing seat and a deep groove ball bearing corresponding to the ball screw are fixedly connected to the granite base platform, and the screw bearing seat is fixedly connected to the granite base platform by a seventh hexagon socket screw;

[0008] The measuring assembly includes a measuring assembly mounting arm and a right-angle laser displacement sensor. The right-angle laser displacement sensor is fixedly connected to the measuring assembly mounting arm through a hexagonal flat-end set screw. One end of the measuring assembly mounting arm is fixedly connected to a right-angle laser displacement sensor cable corresponding to the right-angle laser displacement sensor.

[0009] Preferably, a plurality of leveling foot cups are fixedly connected to the bottom of the frame.

[0010] Preferably, a motor bearing seat corresponding to the servo motor is fixedly connected to the top of the granite base platform, and the motor bearing seat is fixedly connected to the granite base platform through a fifth hexagon socket screw.

[0011] Preferably, the double-row angular contact ball bearing is fixedly connected to the motor bearing seat via a bearing end cover.

[0012] Preferably, the output end of the servo motor and the input end of the flexible coupling are connected via a connecting flange.

[0013] Preferably, the measuring assembly mounting arm is fixedly connected to the top of the granite base platform via a sixth hexagon socket screw.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The detection device in this utility model has a simple structure and high overall reliability. The production process of each material is rational, and the overall cost is low. While other detection methods often cannot detect or are too difficult to detect, this device has high measurement accuracy and is easy to use. It is not affected by human factors and the measured data is highly reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a device for measuring various internal features of a long shaft part proposed by the present invention;

[0017] Figure 2 This is a side structural schematic diagram of a device for measuring various internal features of a long shaft part proposed by the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the product motion platform in the device for measuring multiple internal features of a long shaft part proposed by the present invention;

[0019] Figure 4 for Figure 3 Schematic diagram of the structure at A in FIG;

[0020] Figure 5 This is a schematic structural diagram of a measuring assembly in a device for measuring various internal features of a long shaft part proposed in the present invention;

[0021] Figure 6 This is a side structural schematic diagram of a measuring assembly in a device for measuring various internal features of a long shaft part proposed in the present invention;

[0022] Figure 7 for Figure 6 Schematic diagram of the structure at point B in .

[0023] In the figure: 1 leveling foot cup, 2 frame, 3 granite base platform, 4 product motion platform, 401 linear guide, 402 third hexagon socket screw, 403 linear guide slider, 404 product carrying platform, 405 fourth hexagon socket screw, 406 measured product, 407 motor bearing seat, 408 double-row angular contact ball bearing, 409 bearing end cover, 410 screw locking nut, 411 connecting flange, 412 ball screw, 413 servo motor, 414 fifth hexagon socket screw, 415 screw bearing seat, 416 seventh hexagon socket screw, 417 deep groove ball bearing, 5 measuring assembly, 510 measuring assembly mounting arm, 502 sixth hexagon socket screw, 503 right-angle laser displacement sensor cable, 504 right-angle laser displacement sensor, 505 hexagon socket flat-end set screw, 6 first hexagon socket screw, 7 monitor support rod, 8 computer monitor, 9 second hexagon socket screw. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Reference Figure 1-7A device for measuring multiple internal features of long-axis parts includes a frame 2, a granite base platform 3, a product motion platform 4, and a measuring component 5. The granite base platform 3 is fixedly connected to the top of the frame 2. A plurality of level adjustment foot cups 1 are fixedly connected to the bottom of the frame 2 to adjust the horizontal state of the entire device. The product motion platform 4 and the measuring component 5 are both arranged on the top of the granite base platform 3. The top of the granite base platform 3 is fixedly connected to a display support rod 7 by a first hexagon socket screw 6. A computer monitor 8 is fixedly connected to one side of the display support rod 7 by a second hexagon socket screw 9 for displaying the measurement results.

[0026] In this embodiment, the product motion platform 4 includes a linear guide 401, a product carrying platform 404, a servo motor 413, and a product to be measured 406. The linear guide 401 is composed of steel balls that roll endlessly between the slider and the guide, so that the load platform can easily and accurately move linearly along the guide. The function of this part is to support and guide the moving parts, perform linear reciprocating motion in a given direction, and carry the product for motion measurement. The top of the granite base platform 3 is fixedly connected to a motor bearing seat 407 corresponding to the servo motor 413. The double-row angular contact ball bearing 408 is fixedly connected to the motor bearing seat 407 through the bearing end cover 409. The motor bearing seat 407 is fixedly connected to the granite base platform 3 through the fifth hexagon socket screw 414. The motor bearing seat 407 is used to fix the motor and install the bearing for supporting the rotation of the ball screw. The linear guide 401 is fixedly connected to the top of the granite base platform 3 through the third hexagon socket screw 402.

[0027] In this embodiment, a linear guide slider 403 is slidably connected to the linear guide rail 401. The linear guide slider 403 is a rolling guide in which a steel ball rolls endlessly between the slider and the guide rail, thereby allowing the load platform to easily and accurately move linearly along the guide rail. The function of this part is to support and guide the moving parts, perform linear reciprocating motion in a given direction, and carry products for motion measurement. The product carrying platform 404 is fixedly connected to the top of the linear guide slider 403 by a fourth hexagon socket screw 405. The measured product 406 is horizontally arranged above the product carrying platform 404. The product carrying platform 404 can be freely replaced to be compatible with products of different types and sizes to meet diverse measurements. The servo motor 413 is fixedly connected to the top of the granite base platform 3. The output end of the servo motor 413 is connected to the ball screw 412 through a flexible coupling. The flexible coupling can also effectively eliminate the non-concentricity error between the servo motor and the ball screw.

[0028] In this embodiment, the output end of the servo motor 413 is connected to the input end of the flexible coupling via a connecting flange 411. A double-row angular contact ball bearing 408 is connected to the ball screw 412 via a screw lock nut 410. This supports the ball screw 412, reduces friction during movement, and ensures rotational accuracy. Double-row angular contact ball bearings are selected because they can withstand both radial and axial loads.

[0029] In this embodiment, a screw bearing seat 415 and a deep groove ball bearing 417 corresponding to the ball screw 412 are fixedly connected to the granite base platform 3. The screw bearing seat 415 is fixedly connected to the granite base platform 3 by a seventh hexagon socket screw 416.

[0030] In this embodiment, the measuring component 5 includes a measuring component mounting arm 501 and a right-angle laser displacement sensor 504. The right-angle laser displacement sensor 504 is a sensor that uses laser technology for measurement. It is composed of a laser, a laser detector, and a measuring circuit. It can accurately measure the position, displacement, and other changes of the object being measured without contact. The laser transmitter shoots a visible red laser toward the surface of the object being measured through a lens. The laser scattered by the surface of the object passes through the receiver lens and is received by the internal CCD linear camera. Depending on the distance, the CCD linear camera can "see" this light spot at different angles. Based on this angle and the known distance between the laser and the camera, the digital signal processor can calculate the distance between the sensor and the object being measured. The function of this structure is to scan the measured features inside the product and output the distance between the sensor and the object being measured;

[0031] In this embodiment, the right-angle laser displacement sensor 504 is fixedly connected to the measuring component mounting arm 501 by a hexagonal flat-end fastening screw 505. One end of the measuring component mounting arm 501 is fixedly connected to a right-angle laser displacement sensor cable 503 corresponding to the right-angle laser displacement sensor 504 for transmitting measurement data. The measuring component mounting arm 501 is fixedly connected to the top of the granite base platform 3 by a sixth hexagonal screw 502.

[0032] In this embodiment, the right-angle laser displacement sensor 504 is formed by three groups of laser displacement sensors evenly distributed at 120 degrees, and the calculation is performed based on the readings obtained by the three groups of laser displacement sensors. The specific calculation method is as follows:

[0033] In this embodiment, the installation diameters of the three lasers are first known. The laser displacement sensor can output the distance from the laser displacement sensor to the internal features of the object being measured. The calculation method is as follows:

[0034] In this embodiment, the coordinates of three points are known. Using the principle that the three radii from the three points to the center of the circle are equal, the diameter of the circle passing through these three points can be calculated by the following steps: The coordinates of three sets of laser-measured points on the inner wall of the shaft at a certain position: A (0, 0) B (1, 1) C (2, 3)

[0035] Let the inner diameter of the tube at this position be circle O(m, n)

[0036] From MA=MB=MC, we get:

[0037] MA 2 =MB 2 =MC 2 ,Right now:

[0038] (m-1) 2 +(n-1) 2 =m 2 +n 2

[0039] (m-2) 2 +(n-3) 2 =m 2 +n 2

[0040] The simplified linear equation of two variables is as follows:

[0041] 2m+2n=2

[0042] 4m+6n=13

[0043] Solving the equation yields:

[0044] m=-7 / 2

[0045] n=9 / 2

[0046] That is, the coordinates of M and N are: -7 / 2, 9 / 2

[0047] To find the radius of a circle given the center coordinates of the circle:

[0048] r=√[(x2-x1) 2 +(y2-y1) 2 ]

[0049] Solving the equation, we get: r = 5.7,

[0050] In this embodiment, the inner diameter of the object being measured is calculated using data obtained by the laser displacement sensor. Using the same principle, this structure can detect various internal features of the object being measured, such as diameter, concentricity, major thread diameter, minor thread diameter, etc., by calculating the axis of multiple sets of inner diameters.

[0051] In this embodiment, first, the "product motion platform 4" is moved to the far right by operating the computer; the product is placed on the "product carrying platform 404"; the computer is operated to move the "product motion platform 4" to the left, and moved to the position where the internal features need to be measured; the computer is operated to read the values ​​of the three groups of "right-angle laser displacement sensors 504"; the equipment automatically processes the data in the computer software to obtain the measurement results; and the measurement is completed.

[0052] In this embodiment, the detection device has a simple structure and high overall reliability. The production processes of the various materials are rational, resulting in low overall costs. While other detection methods often fail to detect or are too difficult to detect, this device offers high measurement accuracy and is easy to use. It is unaffected by human factors, and the measured data is highly reliable.

[0053] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for measuring various internal features of a long shaft part, comprising a frame (2), a granite base platform (3), a product motion platform (4) and a measuring assembly (5), characterized in that: The granite base platform (3) is fixedly connected to the top of the frame (2), the product motion platform (4) and the measuring assembly (5) are both arranged on the top of the granite base platform (3), the top of the granite base platform (3) is fixedly connected to a display support rod (7) via a first hexagon socket screw (6), and one side of the display support rod (7) is fixedly connected to a computer display (8) via a second hexagon socket screw (9); The product motion platform (4) includes a linear guide rail (401), a product carrying platform (404), a servo motor (413) and a product to be tested (406). The linear guide rail (401) is fixedly connected to the top of the granite base platform (3) through a third hexagon socket screw (402). A linear guide rail slider (403) is slidably connected to the linear guide rail (401). The product carrying platform (404) is fixedly connected to the top of the linear guide rail slider (403) through a fourth hexagon socket screw (405). The product to be tested (406) is horizontally arranged on the upper surface of the product carrying platform (404). The servo motor (413) is fixedly connected to the top of the granite base platform (3), the output end of the servo motor (413) is connected to a ball screw (412) through a flexible coupling, the ball screw (412) is connected to a double-row angular contact ball bearing (408) through a screw locking nut (410), the granite base platform (3) is fixedly connected to a screw bearing seat (415) and a deep groove ball bearing (417) corresponding to the ball screw (412), and the screw bearing seat (415) is fixedly connected to the granite base platform (3) through a seventh hexagon socket screw (416); The measuring assembly (5) comprises a measuring assembly mounting arm (501) and a right-angle laser displacement sensor (504); the right-angle laser displacement sensor (504) is fixedly connected to the measuring assembly mounting arm (501) via a hexagonal flat-end set screw (505); and one end of the measuring assembly mounting arm (501) is fixedly connected to a right-angle laser displacement sensor cable (503) corresponding to the right-angle laser displacement sensor (504).

2. The device for measuring multiple internal features of a long shaft part according to claim 1, characterized in that: A plurality of leveling adjustment foot cups (1) are fixedly connected to the bottom of the frame (2).

3. The device for measuring multiple internal features of a long shaft part according to claim 1, characterized in that: A motor bearing seat (407) corresponding to the servo motor (413) is fixedly connected to the top of the granite base platform (3), and the motor bearing seat (407) is fixedly connected to the granite base platform (3) via a fifth hexagon socket screw (414).

4. The device for measuring multiple internal features of a long shaft part according to claim 3, characterized in that: The double-row angular contact ball bearing (408) is fixedly connected to the motor bearing seat (407) via a bearing end cover (409).

5. The device for measuring multiple internal features of a long shaft part according to claim 1, characterized in that: The output end of the servo motor (413) and the input end of the flexible coupling are connected via a connecting flange (411).

6. The device for measuring multiple internal features of a long shaft part according to claim 1, characterized in that: The measuring assembly mounting arm (501) is fixedly connected to the top of the granite base platform (3) via a sixth hexagon socket screw (502).

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