阅读说明：本技术 多轴测量设备 (Multi-axis measuring device ) 是由 刘光照 徐一华 刘成 曹葵康 杨广 于 2021-03-31 设计创作，主要内容包括：本发明提供一种多轴测量设备,该测量设备包括基台、升降组件、传感器机构和传送调节机构,升降组件用于调节传感器机构在竖直方向的量程,传感器机构包括第二驱动组件和传感器组件,传感器组件在第二驱动组件的驱动力下绕其中心轴线做旋转运动,传送调节机构用于调节待测量工件的水平姿态；该测量设备通过传送调节机构调节待测量工件的水平姿态,实现通过机械的方式调整待测量工件姿态以使得待测量位置匹配传感器的测量角度,不仅提高了测量效率同时提高了测量精度；另外,通过升降组件来调节传感器在竖直方向的量程,以及利用第二驱动组件即DD马达来实现对传感器的旋转调节,以满足待测量工件的多角度测量,增加待测量工件的测量范围。(The invention provides multi-axis measuring equipment which comprises a base platform, a lifting assembly, a sensor mechanism and a transmission adjusting mechanism, wherein the lifting assembly is used for adjusting the range of the sensor mechanism in the vertical direction; the measuring equipment adjusts the horizontal posture of the workpiece to be measured through the transmission adjusting mechanism, and realizes that the posture of the workpiece to be measured is adjusted in a mechanical mode so that the position to be measured is matched with the measuring angle of the sensor, thereby not only improving the measuring efficiency, but also improving the measuring precision; in addition, the range of the sensor in the vertical direction is adjusted through the lifting assembly, and the rotation adjustment of the sensor is realized by utilizing the second driving assembly, namely the DD motor, so that the multi-angle measurement of the workpiece to be measured is met, and the measurement range of the workpiece to be measured is enlarged.)

1. A multi-axis measuring apparatus, characterized by comprising a measuring apparatus body (100), the measuring apparatus body (100) comprising:

the base platform (30) comprises a horizontal base (320) and a vertical base, and the horizontal base (320) is fixedly connected with the vertical base;

the lifting assembly (40) comprises a first sliding rail (420), a first sliding block (410) and a first driving assembly, the first sliding rail (420) and the first driving assembly are fixedly mounted on the vertical base, and the first sliding block (410) is connected with the first sliding rail (420) in a sliding mode; the first sliding block (410) reciprocates along the direction of the first sliding rail (420) under the driving force of the first driving component;

the sensor mechanism (20) moves along the direction of the first sliding rail (420) along with the first sliding block (410) so as to measure different kinds of workpieces; the sensor mechanism (20) comprises a sensor component and a second driving component (220), the second driving component (220) is installed on one side of the sensor component, and the second driving component (220) is fixedly connected with the first sliding block (410); the sensor component rotates around the central axis of the sensor component under the driving force of the second driving component (220) so as to measure different angles of the workpiece (1) to be measured;

a conveying adjusting mechanism (60), wherein the conveying adjusting mechanism (60) is positioned below the sensor mechanism (20), the conveying adjusting mechanism (60) is fixedly installed on the horizontal base (320), the workpiece (1) to be measured is placed on the conveying adjusting mechanism (60), and the conveying adjusting mechanism (60) is used for adjusting the horizontal posture of the workpiece (1) to be measured so that the position to be measured of the workpiece (1) to be measured matches the measuring angle of the sensor mechanism (20).

2. The multi-axis measuring device of claim 1, wherein the sensor assembly comprises a sensor (230), a sensor holder (210) and a rotating shaft, the sensor (230) is fixedly mounted on the sensor holder (210), one end of the sensor holder (210) is movably connected with the second driving assembly (220), and the other end is fixedly connected with the rotating shaft.

3. Multi-axis measuring device according to claim 1 or 2, wherein the transport adjustment mechanism (60) comprises a first transport assembly (610);

the first transmission assembly (610) comprises a first transmission base (611), a second sliding rail (612), a third driving assembly and a second sliding block (613), the first transmission base (611) is fixedly installed on the horizontal base (320), the second sliding rail (612) and the third driving assembly are fixedly installed on the first transmission base (611), the second sliding rail (612) is in sliding connection with the second sliding block (613), and the workpiece (1) to be measured moves back and forth along the direction of the second sliding rail (612) along with the second sliding block (613) under the driving force of the third driving assembly.

4. Multi-axis measuring device according to claim 3, wherein the transport adjustment mechanism (60) comprises a second transport assembly (620);

the second conveying assembly (620) comprises a second conveying base (621), a third sliding rail (622), a fourth driving assembly and a third sliding block (623), the second conveying base (621) is fixedly connected with the second sliding block (613), the fourth driving assembly and the third sliding rail (622) are fixedly mounted on the second conveying base (621), the third sliding block (623) is in sliding connection with the third sliding rail (622), and the workpiece (1) to be measured moves back and forth along the direction of the third sliding rail (622) along with the third sliding block (623) under the driving force of the fourth driving assembly.

5. Multi-axis measuring device according to claim 4, characterized in that the transport adjustment mechanism (60) comprises a rotation adjustment assembly (630);

the rotary adjusting component (630) comprises an adjusting base (631), a rotor and a fifth driving component, the adjusting base (631) is fixedly connected with a third sliding block (623), the fifth driving component is fixedly installed on the adjusting base (631), one end of the rotor is connected with the fifth driving component, and the other end of the rotor is connected with the workpiece (1) to be measured; the workpiece (1) to be measured rotates along with the rotor under the driving force of the fifth driving component.

6. The multi-axis measuring apparatus according to claim 5, characterized in that the measuring apparatus body (100) further comprises a fixing member (70), the fixing member (70) is fixedly connected with the rotor, the workpiece to be measured (1) is placed on the fixing member (70), and the fixing member (70) follows the rotor to make a rotational movement under the driving force of the fifth driving member to adjust the attitude of the workpiece to be measured (1) in the horizontal direction.

7. The multi-axis measuring apparatus according to claim 6, wherein the fixing assembly (70) includes a fixing base (710), a vacuum extracting assembly, and a plurality of suction cups, the fixing base (710) is fixedly connected with the rotor, the vacuum extracting assembly is fixedly installed in the fixing base (710), the plurality of suction cups are fixedly installed on the fixing base (710), and the plurality of suction cups suck the workpiece (1) to be measured under the action of the vacuum extracting assembly, so that the workpiece (1) to be measured is fixed on the surface of the fixing base (710).

8. Multiaxial measuring device according to claim 1 or 2 wherein the measuring device body (100) further includes a weight assembly (90);

the counterweight assembly (90) comprises a push rod (910) and a sixth driving assembly (920), one end of the push rod (910) is fixedly connected with the first sliding block (410), and the other end of the push rod is connected with the sixth driving assembly (920); under normal conditions, the push rod (910) moves along the direction of the first sliding rail (420) along with the first sliding block (410); in case of emergency braking, the push rod (910) holds the first slider (410) under the driving force of the sixth driving assembly (920) so that the first slider (410) is stationary relative to the first sliding rail (420).

Technical Field

The invention relates to the technical field of measuring equipment, in particular to multi-axis measuring equipment.

Background

At present, the measurement of a workpiece is generally contact measurement and non-contact measurement, and the contact measurement has higher accuracy and reliability, but the contact measurement cost is higher due to the measurement datum point, the abrasion during contact and the like. The non-contact measurement has a fast measurement speed but insufficient accuracy compared with the contact measurement, and a sensor with higher accuracy is used for measurement at present in order to improve the accuracy of the non-contact measurement, such as: a spectral confocal sensor. In the prior art, the attitude of the workpiece to be measured is generally adjusted manually to perform measurement of a plurality of parameters of the workpiece, such as: the overall dimension, thickness and flatness of the workpiece, etc. However, the manual adjustment of the attitude of the workpiece to be measured seriously affects the measurement efficiency and the measurement accuracy.

Disclosure of Invention

In view of this, the present invention provides a multi-axis measuring apparatus, which adjusts the horizontal posture of a workpiece to be measured by a transmission adjusting mechanism, so as to adjust the workpiece to be measured mechanically, thereby improving the measuring efficiency and the measuring accuracy.

In order to solve the technical problems, the invention adopts the following technical scheme:

the multi-axis measuring device according to the embodiment of the present invention includes a measuring device body including:

the base station comprises a horizontal base and a vertical base, and the horizontal base is fixedly connected with the vertical base;

the lifting assembly comprises a first slide rail, a first slide block and a first driving assembly, the first slide rail and the first driving assembly are fixedly arranged on the vertical base, and the first slide block is connected with the first slide rail in a sliding manner; the first sliding block reciprocates along the direction of the first sliding rail under the driving force of the first driving assembly;

the sensor mechanism moves along the first sliding rail direction along with the first sliding block so as to measure different types of workpieces; the sensor mechanism comprises a sensor component and a second driving component, the second driving component is arranged on one side of the sensor component, and the second driving component is fixedly connected with the first sliding block; the sensor assembly rotates around the central axis of the sensor assembly under the driving force of the second driving assembly so as to measure different angles of the workpiece to be measured;

the conveying adjusting mechanism is located below the sensor mechanism and fixedly mounted on the horizontal base, the workpiece to be measured is arranged on the conveying adjusting mechanism, and the conveying adjusting mechanism is used for adjusting the horizontal posture of the workpiece to be measured so that the position to be measured of the workpiece to be measured is matched with the measuring angle of the sensor mechanism.

Preferably, the sensor assembly comprises a sensor, a sensor fixing seat and a rotating shaft, the sensor is fixedly installed on the sensor fixing seat, one end of the sensor fixing seat is movably connected with the second driving assembly, and the other end of the sensor fixing seat is fixedly connected with the rotating shaft.

Preferably, the transport adjustment mechanism comprises a first transport assembly;

the first transmission assembly comprises a first transmission base platform, a second sliding rail, a third driving assembly and a second sliding block, the first transmission base platform is fixedly installed on the horizontal base, the second sliding rail and the third driving assembly are fixedly installed on the first transmission base platform, the second sliding rail is connected with the second sliding block in a sliding mode, and the workpiece to be measured follows the second sliding block to reciprocate along the direction of the second sliding rail under the driving force of the third driving assembly.

Preferably, the transport adjustment mechanism comprises a second transport assembly;

the second conveying assembly comprises a second conveying base platform, a third slide rail, a fourth driving assembly and a third slide block, the second conveying base platform is fixedly connected with the second slide block, the fourth driving assembly and the third slide rail are fixedly mounted on the second conveying base platform, the third slide block is slidably connected with the third slide rail, and the workpiece to be measured moves back and forth along the third slide rail along the driving force of the fourth driving assembly along with the third slide block.

Preferably, the transport adjustment mechanism comprises a rotational adjustment assembly;

the rotary adjusting assembly comprises an adjusting base station, a rotor and a fifth driving assembly, the adjusting base station is fixedly connected with the third sliding block, the fifth driving assembly is fixedly arranged on the adjusting base station, one end of the rotor is connected with the fifth driving assembly, and the other end of the rotor is connected with the workpiece to be measured; the workpiece to be measured rotates along with the rotor under the driving force of the fifth driving assembly.

Preferably, the measuring apparatus body further includes a fixing component, the fixing component is fixedly connected with the rotor, the workpiece to be measured is placed on the fixing component, and the fixing component makes a rotational motion along with the rotor under the driving force of the fifth driving component, so as to adjust the posture of the workpiece to be measured in the horizontal direction.

Preferably, the fixing component comprises a fixing base platform, a vacuum extraction component and a plurality of suckers, the fixing base platform is fixedly connected with the rotor, the vacuum extraction component is fixedly installed in the fixing base platform, the suckers are fixedly installed on the fixing base platform, and the suckers absorb the workpiece to be measured under the action of the vacuum extraction component, so that the workpiece to be measured is fixed on the surface of the fixing base platform.

Preferably, the measuring device body further comprises a counterweight assembly;

the counterweight assembly comprises a push rod and a sixth driving assembly, one end of the push rod is fixedly connected with the first sliding block, and the other end of the push rod is connected with the sixth driving assembly; under the normal condition, the push rod moves along the first slide rail direction along with the first slide block; under the condition of emergency braking, the push rod holds the first sliding block under the driving force of the sixth driving assembly, so that the first sliding block is static relative to the first sliding rail.

The technical scheme of the invention at least has one of the following beneficial effects:

according to the multi-axis measuring equipment disclosed by the invention, the horizontal posture of the workpiece to be measured is adjusted through the transmission adjusting mechanism, so that the posture of the workpiece to be measured is mechanically adjusted to enable the position to be measured to be matched with the measuring angle of the sensor, the measuring efficiency is improved, and the measuring precision is improved; in addition, the range of the sensor in the vertical direction is adjusted through the lifting assembly, and the rotation adjustment of the sensor is realized by utilizing the second driving assembly, namely the DD motor, so that the multi-angle measurement of the workpiece to be measured is met, and the measurement range of the workpiece to be measured is enlarged.

Drawings

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is a side view of a sensor mechanism of an embodiment of the present invention;

fig. 6 is a partial structural diagram of an embodiment of the invention.

Reference numerals:

1. a workpiece to be measured; 100. a measuring device body; 10. a coaxial assembly; 20. a sensor mechanism; 210. a sensor holder; 211. a hollowed-out area; 220. a second drive assembly; 230. a sensor; 231. a balancing weight; 30. A base station; 311. a first vertical base; 312. a second vertical base; 320. a horizontal base; 40. a lifting assembly; 410. a first slider; 411. connecting blocks; 420. a first slide rail; 60. a conveyance adjustment mechanism; 610. a first transfer assembly; 611. a first transfer base; 612. a second slide rail; 613. a second slider; 620. a second transfer assembly; 621. a second transfer station; 622. a third slide rail; 623. a third slider; 630. a rotation adjustment assembly; 631. adjusting the base station; 70. a fixing assembly; 710. fixing the base station; 90. a counterweight assembly; 910. a push rod; 920. and a sixth drive assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

The invention provides a multi-axis measuring apparatus which can be used for measuring the size, thickness, flatness and the like of a workpiece to be measured. The measuring equipment adjusts the horizontal posture of the workpiece to be measured through the transmission adjusting mechanism, and realizes that the posture of the workpiece to be measured is adjusted in a mechanical mode so that the position to be measured is matched with the measuring angle of the sensor, thereby not only improving the measuring efficiency, but also improving the measuring precision; in addition, the range of the sensor in the vertical direction is adjusted through the lifting assembly, and the rotation adjustment of the sensor is realized by utilizing the second driving assembly, namely the DD motor, so that the multi-angle measurement of the workpiece to be measured is met, and the measurement range of the workpiece to be measured is enlarged.

A multi-axis measuring apparatus according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Specifically, as shown in fig. 1 to 6, the multi-axis measuring apparatus provided by the present invention includes a measuring apparatus body 100, the measuring apparatus body 100 including a base 30, a sensor mechanism 20, a lifting assembly 40, and a conveyance adjusting mechanism 60; wherein the content of the first and second substances,

the lifting assembly 40 comprises a first slide rail 420, a first slider 410 and a first driving assembly, the first slide rail 420 and the first driving assembly are fixedly mounted on the base 30, and the first slider 410 is slidably connected with the first slide rail 420; the first slider 410 reciprocates in the direction of the first slide rail 420 by the driving force of the first driving assembly. The first driving assembly is preferably a linear motor, and the precision of the linear motor is higher than that of a traditional screw rod module, and certainly not limited to the linear motor.

The sensor mechanism 20 follows the first slider 410 and moves along the first slide rail 420 to measure different kinds of workpieces. The sensors in the sensor means 20 are preferably spectroscopic confocal sensors which are suitable for high precision and continuous contactless measurement, although the sensors are not limited to spectroscopic confocal sensors. The sensor moves along the vertical direction under the driving of the first driving component, so that the measuring view field of the workpiece 1 to be measured can be increased, and different types of workpieces can be compatible.

The sensor mechanism 20 comprises a sensor component and a second driving component 220, the second driving component 220 is installed at one side of the sensor component, and the second driving component 220 is fixedly connected with the first sliding block 410; the sensor assembly rotates around the central axis thereof under the driving force of the second driving assembly 220 to measure different angles of the workpiece 1 to be measured. The second drive assembly 220 is preferably, but not limited to, a DD motor. The DD motor drives the sensor assembly to rotate, so that the sensor can measure the workpiece 1 to be measured at multiple angles, and different measurement requirements are met.

Further, as shown in fig. 5 and 6, the sensor assembly includes a sensor 230, a sensor holder 210 and a rotating shaft (not shown), the sensor 230 is fixedly mounted on the sensor holder 210, one end of the sensor holder 210 is movably connected to the third driving assembly, and the other end is fixedly connected to the rotating shaft. The sensor fixing base 210 is used for supporting and fixing the sensor, the rotating shaft is fixedly connected with the sensor fixing base 210, and the DD motor drives the sensor fixing base 210 and the sensor to rotate around the central axis of the DD motor. The sensor 230 is driven by the DD motor to rotate reciprocally in the W direction as shown in fig. 5. The sensor assembly further includes a weight 231, and the weight 231 is mounted on the sensor holder 210, and the rotation axis of the sensor 230 is adjusted by mounting the weight 231.

The base platform 30 includes a horizontal base 320 and a vertical base, the horizontal base 320 is fixedly connected with the vertical base, the vertical base includes a first vertical base 311 and a second vertical base 312, and the sensor mechanism 20 is located between the first vertical base 311 and the second vertical base 312. As shown in fig. 2, the first vertical base 311 and the second vertical base 312 are fixedly installed at two side edges of the horizontal base 320, and the sensor mechanism 20 is located between the first vertical base 311 and the second vertical base 312. The first vertical base 311 and the second vertical base 312 are respectively provided with a lifting assembly 40, and the sensor mechanism 20 reciprocates along the first slide rail 420 under the driving force of the two first driving assemblies. Because the mass of the sensor is large, the sensor can be stopped at any position on the first slide rail 420 by the dual-drive linear motor and the counterweight assembly 90, and the stability of the sensor in the lifting process is improved.

In an embodiment of the present invention, as shown in fig. 1, 2 and 4, the conveying adjustment mechanism 60 is located below the sensor mechanism 20, the conveying adjustment mechanism 60 is fixedly mounted on the horizontal base 320, the workpiece 1 to be measured is placed on the conveying adjustment mechanism 60, and the conveying adjustment mechanism 60 is used for adjusting the horizontal posture of the workpiece 1 to be measured so that the position to be measured of the workpiece 1 to be measured matches the measurement angle of the sensor mechanism 20.

Specifically, the conveyance adjustment mechanism 60 includes a first conveyance component 610; the first transfer assembly 610 includes a first transfer base 611, a second slide rail 612, a third drive assembly, and a second slider 613, the first transfer base 611 is fixedly mounted on the horizontal base 320, the second slide rail 612 and the third drive assembly are fixedly mounted on the first transfer base 611, the second slide rail 612 is slidably connected to the second slider 613, and the workpiece 1 to be measured reciprocates along the second slide rail 612 along with the second slider 613 under the driving force of the third drive assembly. The third drive assembly is preferably, but not limited to, a linear motor. The first transfer unit 610 is for transferring the workpiece 1 to be measured to the target position, and the workpiece 1 to be measured is reciprocated in the X-axis direction in the coordinate system shown in fig. 1 by the driving force of the third driving unit.

Further, the conveying adjusting mechanism 60 further includes a second conveying assembly 620, the second conveying assembly 620 includes a second conveying base 621, a third slide rail 622, a fourth driving assembly and a third slide block 623, the second conveying base 621 is fixedly connected to the second slide block 613, the fourth driving assembly and the third slide rail 622 are fixedly mounted on the second conveying base 621, the third slide block 623 is slidably connected to the third slide rail 622, and the workpiece 1 to be measured reciprocates along the direction of the third slide rail 622 along with the third slide block 623 under the driving force of the fourth driving assembly. The fourth drive assembly is preferably, but not limited to, a linear motor. The second transfer unit 620 functions as the first transfer unit 610 for transferring the workpiece 1 to be measured to the target position, and preferably, the transfer direction of the second transfer unit 620 is perpendicular to the transfer direction of the first transfer unit 610, and the range of displacement of the workpiece 1 to be measured in the horizontal direction is satisfied by transferring the workpiece 1 to be measured in two directions. The workpiece 1 to be measured is reciprocated in the Y-axis direction in the coordinate system shown in fig. 1 by the driving force of the fourth driving unit.

Further, the conveyance adjusting mechanism 60 includes a rotation adjusting assembly 630; the rotation adjusting assembly 630 comprises an adjusting base 631, a rotor (not shown in the figure) and a fifth driving assembly (not shown in the figure), the adjusting base 631 is fixedly connected with the third slider 623, the fifth driving assembly is fixedly installed on the adjusting base 631, one end of the rotor is connected with the fifth driving assembly, and the other end of the rotor is connected with the workpiece 1 to be measured; the workpiece 1 to be measured makes a rotational motion following the rotor under the driving force of the fifth driving assembly. The fifth drive assembly is preferably, but not limited to, a DD motor. The workpiece 1 to be measured is driven by the DD motor to rotate so that the adjusted posture of the workpiece 1 to be measured is suitable for the posture required by the sensor. The workpiece 1 to be measured is rotated along the U-axis in the coordinate system as shown in fig. 1 by the drive of the DD motor. The sensor mechanism 20 adjusts the X-axis, the Y-axis and the U-axis of the workpiece to be measured, so that the position to be measured of the workpiece 1 to be measured matches the measurement angle requirement of the sensor, and the measurement efficiency and the measurement accuracy of the workpiece 1 to be measured are improved.

In an embodiment of the present invention, as shown in fig. 4, the measuring apparatus body 100 further includes a fixing component 70, the fixing component 70 is fixedly connected to the rotor, the workpiece 1 to be measured is placed on the fixing component 70, and the fixing component 70 performs a rotation motion along with the rotor under the driving force of the fifth driving component, so as to adjust the posture of the workpiece 1 to be measured in the horizontal direction. The fixing member 70 is below the sensor mechanism 20, and the workpiece 1 to be measured is fixed to the upper surface of the fixing member 70. The fixing assembly 70 comprises a fixing base 710, a vacuum extraction assembly and a plurality of suckers, the fixing base 710 is fixedly connected with the rotor, the vacuum extraction assembly is fixedly installed in the fixing base 710, the suckers are fixedly installed on the fixing base 710, and the suckers absorb the workpiece 1 to be measured under the action of the vacuum extraction assembly, so that the workpiece 1 to be measured is fixed on the surface of the fixing base 710.

In an embodiment of the present invention, as shown in fig. 2 and 3, the measuring apparatus body 100 further includes a weight assembly 90; the counterweight assembly 90 comprises a push rod 910 and a sixth driving assembly 920, wherein one end of the push rod 910 is fixedly connected with the first sliding block 410, and the other end is connected with the sixth driving assembly 920; under normal conditions, the push rod 910 follows the first slider 410 to move along the first sliding rail 420; in case of emergency braking, the push rod 910 holds the first slider 410 under the driving force of the sixth driving assembly 920, so that the first slider 410 is stationary with respect to the first slide rail 420. The push rod 910 is fixed on the connecting block 411 through a fixing member, and the connecting block 411 is fixedly connected with the first sliding block 410. The sixth driving assembly 920 is preferably a brake cylinder, the braking principle of the counterweight assembly 90 is similar to that of the brake cylinder, when an emergency braking situation occurs, the brake cylinder locks the push rod 910 so that the push rod 910 can hold the first sliding block 410, and the counterweight assembly 90 enables the sensor mechanism 20 to stop at any position of the first sliding rail 420 under any situation, so as to avoid the occurrence of equipment damage caused by the fact that the sensor mechanism 20 cannot be immediately braked and stopped under the emergency power-off situation; in addition, the counterweight assembly 90 solves the problem that the high-precision linear motor has no braking function.

In an embodiment of the present invention, as shown in fig. 6, the measuring apparatus body 100 further includes a coaxial assembly 10, two first coaxial holes are provided on the coaxial assembly 10, two sides of the sensor mechanism 20 are respectively connected with the two first coaxial holes of the coaxial assembly 10, and the coaxial assembly 10 is connected to two sides of the sensor mechanism 20 through the two first coaxial holes. The mass of the sensor assembly is large, and the coaxial precision is difficult to ensure in the process that the DD motor drives the sensor assembly to rotate. The coaxial assemblies 10 are fixedly mounted on two sides of the sensor assembly, the coaxial assemblies 10 made of rigid materials enable the sensor assembly to rotate around the central axis of the sensor assembly all the time in the rotating process, the measuring accuracy of the measuring equipment body 100 is improved, and the rigid coaxial assemblies 10 are preferably made of metal materials. The coaxial assembly 10 is provided with a plurality of hollow areas 211, and the hollow areas 211 are used for reducing the weight of the coaxial assembly 10 so as to reduce the pressure of the driving assembly when the coaxial assembly 10 does lifting movement.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.