A multi-reference measuring device for high-precision shaft parts

Abstract

This utility model discloses a high-precision multi-reference measuring device for shaft parts, including a measuring platform. The top of the measuring platform is provided with longitudinal and transverse grid grooves. A correction component is installed on the top of the measuring platform. A telescopic adjustment rod is also installed on the top of the measuring platform. One end of the telescopic adjustment rod is fixedly connected to a connecting end. A slide rod is internally engaged with the connecting end. A movable pulley frame is slidably mounted on the outer wall of the slide rod. A drive motor is installed on the outer wall of the movable pulley frame. Longitudinal and transverse rods are installed on the inner side of the movable pulley frame. A height adjustment component is installed on the top of the longitudinal and transverse rods. A three-dimensional measuring component is installed at the bottom of the height adjustment component. This utility model provides a high-precision multi-reference measuring device for shaft parts that utilizes a correction motor to drive a bidirectional threaded rod, which in turn drives the transverse and longitudinal correction rods to automatically center and correct the part, enabling precise control of the correction force and position.

Description

Technical Field

[0001] This utility model relates to the technical field of high-precision shaft parts, specifically a multi-reference measuring device for high-precision shaft parts. Background Technology

[0002] In the utility model patent application CN222857733U, published on May 13, 2025, entitled "A Measurement and Positioning Device", this utility model relates to the field of shaft part measurement technology, and particularly to a measurement and positioning device, comprising: a measuring base, a first straight groove formed in the middle of the measuring base, and second straight grooves formed on both sides of the first straight groove; a placement block a, fixed to the upper center of the measuring base, with a first overlapping groove formed above the placement block a; two placement blocks b, slidably disposed on both sides of the measuring base along its length, with a second overlapping groove formed above each of the two placement blocks b; a bidirectional drive assembly, embedded inside the first straight groove; two drive rods, each disposed in one of the two second straight grooves and connecting the two drive parts of the bidirectional drive assembly to the two placement blocks b respectively; and a reference baffle. This application can avoid enterprises from making multiple placement fixtures for shaft parts of different lengths, reducing enterprise costs and having strong practicality.

[0003] Shafts are among the most basic and commonly used parts in the field of mechanical manufacturing, widely applied in industries such as automobiles, aerospace, and precision instruments. Their precision directly affects the operational stability and service life of the entire mechanical equipment. During the production and processing of shafts, it is necessary to accurately measure their geometric parameters such as diameter, roundness, cylindricity, and coaxiality to ensure that the parts meet design requirements.

[0004] Currently, most shaft part measuring devices on the market use a single reference or manual-assisted positioning for measurement. This results in low positioning accuracy, and the parts are prone to shifting when placed manually, leading to inaccurate measurement references and affecting the reliability of measurement results. At the same time, the measurement flexibility is poor, and the position adjustment of the measuring mechanism of traditional devices is inconvenient, making it difficult to adapt to the multi-directional measurement needs of shaft parts of different specifications. The position of the shaft parts may shift during the measurement process, affecting the measurement results. Therefore, developing a multi-reference measuring device with automatic correction positioning, multi-directional adjustment, and high-precision measurement functions is of great practical significance. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision multi-reference measuring device for shaft parts, so as to solve the problems of low positioning accuracy, poor measurement flexibility and measurement error caused by position offset mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-reference measuring device for high-precision shaft parts, comprising a measuring platform, a longitudinal and transverse grid groove on the top of the measuring platform, a correction component mounted on the top of the measuring platform, a telescopic adjustment rod mounted on the top of the measuring platform, a connecting end fixedly connected to one end of the telescopic adjustment rod, a slide rod engaged internally within the connecting end, a movable pulley frame slidably mounted on the outer wall of the slide rod, a drive motor mounted on the outer wall of the movable pulley frame, longitudinal and transverse bars mounted on the inner side of the movable pulley frame, a height adjustment component mounted on the top of the longitudinal and transverse bars, and a three-dimensional measuring component mounted on the bottom of the height adjustment component.

[0007] Furthermore, the internal components of the correction assembly include a correction motor, a bidirectional threaded rod, a threaded movable cylinder, a transverse correction rod, a slider, and a longitudinal correction rod. The correction motor is installed on the inner side of the measuring platform. The output shaft of the correction motor is fixedly connected to the bidirectional threaded rod via a coupling. The outer wall of the bidirectional threaded rod is threadedly connected to the threaded movable cylinder. The outer wall of the threaded movable cylinder is fixedly connected to the transverse correction rod. A slider is slidably installed on the top of the measuring platform. The outer wall of the slider is fixedly connected to the longitudinal correction rod.

[0008] Furthermore, two sets of transverse straightening rods are provided, and the transverse straightening rods pass through the longitudinal straightening rods. Another set of bidirectional threaded rods is provided at the bottom of the longitudinal straightening rods.

[0009] Furthermore, the top of the measuring platform is provided with a guide rail, and the other end of the transverse correction rod is connected to the guide rail. Pressure sensors are installed on the inner sides of the transverse correction rod and the longitudinal correction rod. The output end of the pressure sensor is electrically connected to a controller, and the output end of the controller is electrically connected to the correction motor. The correction contact surfaces of the transverse correction rod and the longitudinal correction rod are covered with wear-resistant rubber pads.

[0010] Furthermore, the height adjustment assembly internally includes a sliding frame, a support frame, a lifting motor, a screw rod, an adjustment frame, and a main unit. The outer wall of the longitudinal and transverse rods is provided with a sliding frame, the inner side of the sliding frame is provided with a support frame, the top of the support frame is provided with a lifting motor, the output shaft of the lifting motor is fixedly connected to a screw rod through a coupling, the outer wall of the screw rod is threadedly connected with an adjustment frame, and the main unit is installed inside the adjustment frame.

[0011] Furthermore, a servo motor is installed on the inner side of the sliding frame, and a drive gear is fixedly connected to the output shaft of the servo motor. A rack that meshes with the drive gear is provided on the outer wall of the longitudinal and transverse rods, and a guide wheel is installed on the inner wall of the sliding frame. The guide wheel is in rolling connection with the side wall of the longitudinal and transverse rods.

[0012] Furthermore, the internal components of the three-dimensional measurement assembly include a connector, a universal joint, and a three-dimensional measurement probe. The output end of the host is fixedly connected to the connector, the universal joint is installed inside the connector, the output end of the universal joint is fixedly connected to the three-dimensional measurement probe, the probe end of the three-dimensional measurement probe is equipped with a ruby ​​probe, and an angle encoder is installed inside the universal joint. The angle encoder is connected to the host for signal transmission.

[0013] Compared with the prior art, the beneficial effects of this utility model are: this high-precision shaft parts multi-reference measuring device is reasonable and has the following advantages:

[0014] (1) This utility model sets up a correction component, which uses a correction motor to drive a bidirectional threaded rod to drive the transverse correction rod and the longitudinal correction rod to automatically center and correct the part. Combined with the closed-loop control of the pressure sensor and the controller, it can accurately control the correction force and position, effectively solving the problem of low positioning accuracy of traditional measuring devices. At the same time, the wear-resistant rubber pad can protect the surface of the part from damage. The correction and measurement processes are automatically controlled by motor drive and electronic components, reducing manual intervention, which not only improves the measurement efficiency, but also avoids human operation errors and significantly improves the measurement accuracy. Meanwhile, the setting of auxiliary structures such as heat dissipation, buffer, and lubrication ensures the stability of the device operation and service life.

[0015] (2) The device achieves high-precision measurement flexibility through a three-dimensional spatial linkage adjustment system: In the horizontal direction, the telescopic adjustment rod adopts a threaded pair transmission structure, abandoning the previous angular slide rail structure and using a smoother slide rod and longitudinal and transverse rods for support and limitation, which reduces friction during the movement process and increases sliding speed and accuracy. Through the cooperation of the telescopic adjustment rod, movable pulley frame and sliding frame, the three-dimensional measurement component can be flexibly adjusted in the horizontal, longitudinal and horizontal directions; The height adjustment component achieves precise control of the measurement height through the screw rod transmission, and the universal joint allows the three-dimensional measurement probe to rotate at multiple angles, which greatly improves the measurement flexibility of the device and can adapt to the multi-reference measurement needs of shaft parts of different specifications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the corrective component of this utility model;

[0019] Figure 4 This is a schematic diagram of the height adjustment component of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the three-dimensional measurement component of this utility model.

[0021] In the diagram: 1. Measuring platform; 2. Longitudinal and transverse grid grooves; 3. Correction assembly; 301. Correction motor; 302. Bidirectional threaded rod; 303. Threaded movable cylinder; 304. Transverse correction rod; 305. Slider; 306. Longitudinal correction rod; 4. Telescopic adjustment rod; 5. Connecting end; 6. Slide rod; 7. Movable pulley frame; 8. Drive motor; 9. Longitudinal and transverse rods; 10. Height adjustment assembly; 1001. Sliding frame; 1002. Support frame; 1003. Lifting motor; 1004. Helical rod; 1005. Adjustment frame; 1006. Main unit; 11. Three-dimensional measurement assembly; 1101. Connector; 1102. Universal shaft; 1103. Three-dimensional measurement probe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 The present invention provides a technical solution as follows:

[0024] Example 1:

[0025] A high-precision multi-reference measuring device for shaft parts includes a measuring table 1, with longitudinal and transverse grid grooves 2 on the top of the measuring table 1, a correction component 3 mounted on the top of the measuring table 1, a telescopic adjustment rod 4 mounted on the top of the measuring table 1, a connecting end 5 fixedly connected to one end of the telescopic adjustment rod 4, a slide rod 6 engaged internally on the connecting end 5, a movable pulley frame 7 slidably mounted on the outer wall of the slide rod 6, a drive motor 8 mounted on the outer wall of the movable pulley frame 7, longitudinal and transverse bars 9 mounted on the inner side of the movable pulley frame 7, a height adjustment component 10 mounted on the top of the longitudinal and transverse bars 9, and a three-dimensional measuring component 11 mounted on the bottom of the height adjustment component 10.

[0026] The above structure uses the measuring platform 1 as a supporting base to provide an installation platform for each component; the longitudinal and transverse grid grooves 2 provide an initial positioning reference; the correction component 3 realizes the automatic and precise positioning of the parts; the telescopic adjustment rod 4, the slide rod 6 and the movable pulley frame 7 constitute a horizontal coarse adjustment mechanism; the longitudinal and transverse rods 9 and the height adjustment component 10 form a precision adjustment system; the three-dimensional measurement component 11 is responsible for completing parameter acquisition and detection. All components work together to realize multi-reference high-precision measurement of shaft parts.

[0027] Furthermore, the internal components of the correction assembly 3 include a correction motor 301, a bidirectional threaded rod 302, a threaded movable cylinder 303, a transverse correction rod 304, a slider 305, and a longitudinal correction rod 306. The correction motor 301 is mounted inside the measuring platform 1. The output shaft of the correction motor 301 is fixedly connected to the bidirectional threaded rod 302 via a coupling. The outer wall of the bidirectional threaded rod 302 is threadedly connected to the threaded movable cylinder 303. The outer wall of the threaded movable cylinder 303 is fixedly connected to the transverse correction rod 304. The slider 305 is slidably mounted on the top of the measuring platform 1. The outer wall of the slider 305 is fixedly connected to the longitudinal correction rod 306. The measuring platform 1 has two sets of transverse straightening rods 304, with the transverse straightening rods 304 passing through the longitudinal straightening rods 306. The bottom of the longitudinal straightening rods 306 is provided with another set of bidirectional threaded rods 302. The top of the measuring platform 1 is provided with a guide rail, and the other end of the transverse straightening rods 304 is connected to the guide rail. Pressure sensors are installed on the inner sides of the transverse straightening rods 304 and the longitudinal straightening rods 306. The output end of the pressure sensors is electrically connected to a controller, and the output end of the controller is electrically connected to the straightening motor 301. The straightening contact surfaces of the transverse straightening rods 304 and the longitudinal straightening rods 306 are covered with wear-resistant rubber pads.

[0028] The above structure is fixedly installed in the mounting cavity inside the measuring table 1 by bolts through the straightening motor 301. Its output shaft is coaxially connected to the bidirectional threaded rod 302 through a rigid coupling. The two ends of the bidirectional threaded rod 302 are rotatably connected to the inner wall of the measuring table 1 through high-precision ball bearings to ensure smooth rotation.

[0029] Furthermore, the height adjustment assembly 10 internally houses a sliding frame 1001, a support frame 1002, a lifting motor 1003, a screw rod 1004, an adjustment frame 1005, and a main unit 1006. The sliding frame 1001 is mounted on the outer wall of the crossbar 9, and the support frame 1002 is mounted on the inner side of the sliding frame 1001. The lifting motor 1003 is mounted on the top of the support frame 1002. The output shaft of the lifting motor 1003 is fixedly connected to the screw rod 1004 via a coupling. The adjustment frame 1005 is threadedly connected to the outer wall of the screw rod 1004. The main unit 1006 is installed inside the adjustment frame 1005. A servo motor is mounted on the inner side of the sliding frame 1001. The output shaft of the servo motor is fixedly connected to a drive gear. A rack that meshes with the drive gear is provided on the outer wall of the crossbar 9, and a guide wheel is mounted on the inner wall of the sliding frame 1001. The guide wheel is in rolling connection with the side wall of the crossbar 9.

[0030] The above structure adopts an electric multi-stage sleeve structure through the telescopic adjustment rod 4. The fixed end is connected to the top of the measuring table 1 through a flange, and the telescopic end is welded and fixed to the connecting end 5. The connecting end 5 has a slot inside, and the slide rod 6 is fixed by the slot, which is convenient for disassembly and replacement. This mechanism is used to drive the three-dimensional measuring component 11 to achieve precise displacement in three-dimensional space to meet the measurement needs of different positions.

[0031] Furthermore, the internal components of the 3D measurement assembly 11 include a connector 1101, a universal joint 1102, and a 3D measurement probe 1103. The output end of the host 1006 is fixedly connected to the connector 1101. The universal joint 1102 is installed inside the connector 1101. The output end of the universal joint 1102 is fixedly connected to the 3D measurement probe 1103. A ruby ​​probe is installed at the detection end of the 3D measurement probe 1103. An angle encoder is installed inside the universal joint 1102. The angle encoder is connected to the host 1006 via signal.

[0032] The above structure adopts a ball-cage universal joint structure through the universal joint 1102, which can realize 360° rotation and ±85° swing. It integrates a high-precision angle encoder to collect probe angle signals in real time and transmit them to the host 1006. One end of the three-dimensional measurement probe 1103 is connected to the output end of the universal joint 1102, and the other end is equipped with a ruby ​​probe. Ruby material has high hardness and strong wear resistance, which can effectively extend the service life of the probe. The three-dimensional measurement probe 1103 integrates a grating displacement sensor, which can convert the probe displacement into an electrical signal and transmit it to the host 1006 for data processing.

[0033] Working principle: When in use, first adjust the measuring table 1 to a horizontal state by adjusting the leveling feet: observe the horizontal state, rotate the corresponding telescopic adjustment rod 4, and use the screw and the threaded engagement of the support to adjust the height of each corner of the measuring table 1 until the horizontal display is horizontal. Then place the shaft part to be measured on the longitudinal and transverse grid grooves 2 of the measuring table 1. The longitudinal and transverse grid grooves 2 can initially position the part.

[0034] The straightening assembly 3 is activated for automatic straightening and positioning: The controller controls the straightening motor 301 to start, which drives the bidirectional threaded rod 302 to rotate. Since the threads at both ends of the bidirectional threaded rod 302 corresponding to the transverse straightening rod 304 are opposite, the threaded movable cylinder 303 will drive the two sets of transverse straightening rods 304 to move relative to each other along the guide rail. At the same time, the bidirectional threaded rod 302 at the bottom of the longitudinal straightening rod 306 drives the longitudinal straightening rod 306 to move along the ball groove through the same principle. When the transverse straightening rod 304 and the longitudinal straightening rod 306 contact the part, the pressure sensor detects the pressure signal and transmits it to the controller. The controller controls the straightening motor 301 to stop running according to the preset pressure threshold, thus completing the automatic centering and straightening of the part. The wear-resistant rubber pad on the straightening contact surface can prevent scratches on the surface of the part during the straightening process.

[0035] After the correction is completed, the position of the measuring mechanism is adjusted according to the size of the part, the drive motor 8 is started, and the movable pulley frame 7 is driven to slide along the slide bar 6 to realize the longitudinal position adjustment of the longitudinal and transverse bars 9; the servo motor in the movable pulley frame 7 is started, and the servo motor drives the drive gear to rotate. By using the meshing of the drive gear and the rack, the movable pulley frame 7 slides along the longitudinal and transverse bars 9, and the guide wheel plays an auxiliary guiding role.

[0036] Start the lifting motor 1003, which drives the screw rod 1004 to rotate. The adjusting frame 1005 moves up and down along the guide groove under the action of the screw rod 1004, adjusting the three-dimensional measuring component 11 to a suitable measuring height.

[0037] Finally, three-dimensional measurement is performed: the host 1006 controls the three-dimensional measurement probe 1103 to work, the universal joint 1102 enables the three-dimensional measurement probe 1103 to rotate at multiple angles, and the angle encoder transmits the probe rotation angle signal to the host 1006 in real time; the ruby ​​probe contacts the surface of the part and transmits the measurement data to the host 1006. The host 1006 processes and analyzes the data to obtain the geometric parameters of the part. During the measurement process, the cooling fan in the heat sink housing works continuously to dissipate heat for the host 1006; the buffer spring and lubricating bearing ensure the smooth movement of the measuring mechanism.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-precision multi-reference measuring device for shaft parts, comprising a measuring table (1), characterized in that: The top of the measuring platform (1) is provided with longitudinal and transverse grid grooves (2), the top of the measuring platform (1) is equipped with a correction component (3), the top of the measuring platform (1) is equipped with a telescopic adjustment rod (4), one end of the telescopic adjustment rod (4) is fixedly connected to a connecting end (5), the connecting end (5) is internally engaged with a slide rod (6), the outer wall of the slide rod (6) is slidably equipped with a movable pulley frame (7), the outer wall of the movable pulley frame (7) is equipped with a drive motor (8), the inner side of the movable pulley frame (7) is equipped with longitudinal and transverse rods (9), the top of the longitudinal and transverse rods (9) is equipped with a height adjustment component (10), and the bottom of the height adjustment component (10) is equipped with a three-dimensional measuring component (11).

2. The high-precision multi-reference measuring device for shaft parts according to claim 1, characterized in that: The internal components of the correction assembly (3) include a correction motor (301), a bidirectional threaded rod (302), a threaded movable cylinder (303), a transverse correction rod (304), a slider (305), and a longitudinal correction rod (306). The correction motor (301) is installed on the inner side of the measuring platform (1). The output shaft of the correction motor (301) is fixedly connected to the bidirectional threaded rod (302) via a coupling. The outer wall of the bidirectional threaded rod (302) is threadedly connected to the threaded movable cylinder (303). The outer wall of the threaded movable cylinder (303) is fixedly connected to the transverse correction rod (304). The top of the measuring platform (1) is slidably mounted with a slider (305). The outer wall of the slider (305) is fixedly connected to the longitudinal correction rod (306).

3. The high-precision multi-reference measuring device for shaft parts according to claim 2, characterized in that: Two sets of transverse straightening rods (304) are provided, and the transverse straightening rods (304) pass through the longitudinal straightening rods (306). Another set of bidirectional threaded rods (302) is provided at the bottom of the longitudinal straightening rods (306).

4. The high-precision multi-reference measuring device for shaft parts according to claim 2, characterized in that: The top of the measuring platform (1) is provided with a guide rail, and the other end of the transverse correction rod (304) is connected to the guide rail. Pressure sensors are installed on the inner sides of the transverse correction rod (304) and the longitudinal correction rod (306). The output end of the pressure sensor is electrically connected to a controller. The output end of the controller is electrically connected to the correction motor (301). The correction contact surfaces of the transverse correction rod (304) and the longitudinal correction rod (306) are covered with wear-resistant rubber pads.

5. The high-precision multi-reference measuring device for shaft parts according to claim 1, characterized in that: The height adjustment assembly (10) is internally equipped with a sliding frame (1001), a support frame (1002), a lifting motor (1003), a screw rod (1004), an adjustment frame (1005), and a main unit (1006). The outer wall of the longitudinal and transverse bars (9) is provided with a sliding frame (1001). The inner side of the sliding frame (1001) is equipped with a support frame (1002). The top of the support frame (1002) is equipped with a lifting motor (1003). The output shaft of the lifting motor (1003) is fixedly connected to the screw rod (1004) through a coupling. The outer wall of the screw rod (1004) is threadedly connected to the adjustment frame (1005). The main unit (1006) is internally installed in the adjustment frame (1005).

6. The high-precision multi-reference measuring device for shaft parts according to claim 5, characterized in that: A servo motor is installed on the inner side of the sliding frame (1001). The output shaft of the servo motor is fixedly connected to a drive gear. A rack that meshes with the drive gear is provided on the outer wall of the longitudinal and transverse rods (9). A guide wheel is installed on the inner wall of the sliding frame (1001). The guide wheel is in rolling connection with the side wall of the longitudinal and transverse rods (9).

7. The high-precision multi-reference measuring device for shaft parts according to claim 5, characterized in that: The internal components of the three-dimensional measurement assembly (11) include a connector (1101), a universal joint (1102), and a three-dimensional measurement probe (1103). The output end of the host (1006) is fixedly connected to the connector (1101). The universal joint (1102) is installed inside the connector (1101). The output end of the universal joint (1102) is fixedly connected to the three-dimensional measurement probe (1103). The probe end of the three-dimensional measurement probe (1103) is equipped with a ruby ​​probe. An angle encoder is installed inside the universal joint (1102). The angle encoder is connected to the host (1006) via signal.

Images