Verticality detection device for metrological verification

Abstract

The invention discloses a perpendicularity detection device for metrological verification, and relates to the field of perpendicularity detection. According to the perpendicularity detection device for metrological verification, the detection part and the positioning assembly are arranged on the base station, when the perpendicularity of a shaft piece is measured, the shaft piece can be inserted into the middle of the mounting cylinder, the elastic piece upwards supports the sliding plate and the clamping ring, and the clamping ring upwards moves to be inserted into the containing cavity to extrude the clamping ball; the multiple clamping balls move towards the middle of the mounting cylinder under the extrusion effect of the clamping ring, part of the structures of the clamping balls extend into a middle cavity of the mounting cylinder to extrude the shaft piece, the multiple clamping balls are matched with one another to clamp the shaft piece, the shaft piece is vertical, the axis of the shaft piece and the axis of the mounting cylinder are overlapped, the contact area between the clamping balls and the shaft piece is small, and the clamping balls are not prone to falling off. The influence of the clamping ball on the shaft piece can be effectively reduced, and the vertical shaft piece is detected through the measuring instrument, so that the perpendicularity detection precision of the shaft piece can be effectively improved.

Description

Technical Field

[0001] This invention relates to verticality testing technology, and more specifically to a verticality testing device for metrological verification. Background Technology

[0002] Perpendicularity error is a fundamental and critical geometric tolerance affecting the quality, safety, lifespan, and performance of mechanical systems and engineering structures. From a technical perspective, it directly determines the force transmission path, the accuracy of motion trajectories, and the fit between components. Even minute perpendicularity deviations can lead to poor contact, uneven gaps, or seal failure in static assembly, while in dynamic operation they can translate into additional bending moments, vibration, or abnormal wear, becoming a hidden cause of decreased transmission efficiency, noise, heat generation, and even premature fatigue failure of components. From a quality control and standardization perspective, verification is the only objective means to ensure that products conform to design drawings and technical specifications. Its data is the authoritative basis for determining qualification, making assembly adjustments, and improving processes. For critical components such as precision machine tool spindles, large slewing bearings, and high-rise building frames, it is the lifeline for ensuring their positioning accuracy, rotational stability, and load-bearing uniformity. Furthermore, from a safety and economic perspective, detecting and eliminating verticality deviations in advance through metrological verification is a low-cost preventative measure that can effectively avoid major equipment accidents and safety risks caused by loss of precision, mechanical jamming, or structural instability. Its value far exceeds the repair and downtime losses after a failure occurs.

[0003] Existing perpendicularity testing devices for metrological verification cannot stably clamp shaft components when measuring them, leading to slippage errors when the measuring instrument moves across the shaft surface. Although a three-jaw chuck can be used to clamp the shaft, the jaws of the chuck are long and have a large contact area with the shaft surface. If there are uneven areas on the shaft surface, the axis of the entire shaft will deviate, thus affecting the perpendicularity measurement results. Therefore, a new device for measuring the perpendicularity of shaft components needs to be designed. Summary of the Invention

[0004] The purpose of this invention is to provide a perpendicularity testing device for metrological verification, so as to solve the problem of deviation that occurs when measuring shaft perpendicularity in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a verticality detection device for metrological verification, comprising a base, wherein the base is provided with:

[0006] The detection unit includes a height adjustment component disposed on the base and a telescopic rod disposed on the height adjustment component, wherein a measuring instrument is connected to the telescopic rod;

[0007] The positioning assembly includes a mounting cylinder connected to the base and a clamping positioning member disposed in the mounting cylinder. The clamping positioning member includes a mounting cavity and a receiving cavity formed on the mounting cylinder. The receiving cavity communicates with the central cavity of the mounting cylinder. A sliding plate is slidably connected to the mounting cylinder in the mounting cavity. A retaining ring extending into the receiving cavity is connected to the sliding plate. Multiple retaining balls are engaged in the receiving cavity. An elastic member for pushing the sliding plate upward is disposed in the mounting cavity. A pressing member for cooperating with the sliding plate is disposed in the mounting cylinder.

[0008] Preferably, the connecting channel between the receiving cavity and the mounting cylinder is provided with a protrusion to prevent the ball from detaching from the receiving cavity.

[0009] Preferably, the elastic element includes a positioning post connected to the mounting cylinder and a spring engaged with the positioning post, one end of the spring abutting against the bottom of the mounting cavity and the other end abutting against the sliding plate.

[0010] Preferably, the mounting cylinder has multiple sets of clamping and positioning components arranged along the axial direction inside, and a bottom cone is connected to the middle of the mounting cylinder.

[0011] Preferably, the side wall of the mounting cylinder is provided with a side groove, the pressing component includes a pressure ring and a connecting frame, the pressure ring is located inside the mounting cavity and is sleeved on the retaining ring, the end of the connecting frame passes through the side groove and is connected to the retaining ring, a sliding sleeve is hinged to the connecting frame through a hinge shaft, a rotating rod is slidably connected in the sliding sleeve, one end of the rotating rod is hinged to the base, and the other end is hinged to a handle.

[0012] Preferably, the upper end of the retaining ring gradually narrows from the inside out.

[0013] Preferably, the height adjustment component includes a mounting shell connected to the base, a motor connected to the top of the mounting shell, and a lead screw rotatably connected to the mounting shell. The lead screw is connected to the output shaft of the motor. A lifting groove is provided on the side wall of the mounting shell. A lifting plate is threaded onto the lead screw. One end of the lifting plate is engaged in the lifting groove and connected to a telescopic rod. A scale is provided on the mounting shell.

[0014] Preferably, the telescopic rod includes a slide cylinder connected to the lifting plate, a slide rod slidably connected to the end of the slide cylinder, and a brake bolt threaded onto the slide cylinder. The measuring instrument is connected to the slide rod, and both the slide cylinder and the slide rod are triangular prisms.

[0015] Compared with the prior art, the verticality testing device for metrological verification provided by the present invention, by setting a testing part and a positioning component on a base, allows the shaft to be inserted into the middle of the mounting cylinder when measuring the verticality of a shaft. The elastic element lifts the sliding plate and the retaining ring upwards, and the retaining ring moves upwards to insert into the receiving cavity to squeeze the retaining balls. Multiple retaining balls move towards the middle of the mounting cylinder under the squeezing action of the retaining ring, and part of the retaining ball structure extends into the middle cavity of the mounting cylinder to squeeze the shaft. The multiple retaining balls cooperate to hold the shaft, making the shaft vertical and ensuring that the axis of the shaft overlaps with the axis of the mounting cylinder. Moreover, the contact area between the retaining balls and the shaft is small, which can effectively reduce the influence of the retaining balls on the shaft. At this time, the vertical shaft is tested by a measuring instrument, which can effectively improve the accuracy of shaft verticality testing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention. Figure 1 ;

[0018] Figure 2 A schematic diagram of the overall structure provided for an embodiment of the present invention. Figure 2 ;

[0019] Figure 3 Provided for embodiments of the present invention Figure 2 Enlarged view of part A in the middle;

[0020] Figure 4 Schematic diagram of the cross-sectional structure of the positioning component provided in the embodiment of the present invention. Figure 1 ;

[0021] Figure 5 Schematic diagram of the cross-sectional structure of the positioning component provided in the embodiment of the present invention. Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the pressing component structure provided in an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Base; 2. Mounting shell; 3. Motor; 4. Lead screw; 5. Lifting groove; 6. Lifting plate; 7. Slide cylinder; 8. Slide rod; 9. Brake bolt; 10. Measuring instrument; 11. Scale; 12. Mounting cylinder; 13. Mounting cavity; 14. Receiving cavity; 15. Slide plate; 16. Snap ring; 17. Spring; 18. Positioning pin; 19. Snap ball; 20. Side groove; 21. Pressure ring; 22. Connecting frame; 23. Slide sleeve; 24. Rotating rod; 25. Handle; 26. Bottom cone. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 To be continued Figure 6 As shown:

[0027] Example 1:

[0028] This invention provides a verticality testing device for metrological verification, comprising a base 1, wherein the base 1 is provided with:

[0029] The detection unit includes a height adjustment component disposed on the base 1 and a telescopic rod disposed on the height adjustment component, wherein a measuring instrument 10 is connected to the telescopic rod.

[0030] The positioning assembly includes a mounting cylinder 12 connected to the base 1 and a clamping positioning member disposed in the mounting cylinder 12. The clamping positioning member includes a mounting cavity 13 and a receiving cavity 14 formed on the mounting cylinder 12. The receiving cavity 14 communicates with the central cavity of the mounting cylinder 12. A sliding plate 15 is slidably connected to the mounting cylinder 12 in the mounting cavity 13. A retaining ring 16 extending into the receiving cavity 14 is connected to the sliding plate 15. A plurality of retaining balls 19 are engaged in the receiving cavity 14. An elastic member for pushing the sliding plate 15 is disposed in the mounting cavity 13. A pressing member for cooperating with the sliding plate 15 is disposed in the mounting cylinder 12.

[0031] As can be seen from the above, by setting a detection unit and a positioning component on the base 1, when measuring the perpendicularity of the shaft, the shaft can be inserted into the middle of the mounting cylinder 12. The elastic element lifts the slide plate 15 and the retaining ring 16 upward. The retaining ring 16 moves upward and inserts into the receiving cavity 14 to squeeze the retaining balls 19. Under the squeezing action of the retaining ring 16, multiple retaining balls 19 move towards the middle of the mounting cylinder 12, and part of the structure of the retaining balls 19 extends into the middle cavity of the mounting cylinder 12 to squeeze the shaft. Multiple retaining balls 19 cooperate with each other to hold the shaft, making the shaft vertical and making the shaft axis overlap with the axis of the mounting cylinder 12. Moreover, the contact area between the retaining balls 19 and the shaft is small, which can effectively reduce the influence of the retaining balls 19 on the shaft. At this time, the vertical shaft can be detected by the measuring instrument 10, which can effectively improve the detection accuracy of the shaft perpendicularity.

[0032] Example 2:

[0033] This invention provides a verticality testing device for metrological verification, comprising a base 1, wherein the base 1 is provided with:

[0034] The detection unit includes a height adjustment component disposed on the base 1 and a telescopic rod disposed on the height adjustment component, wherein a measuring instrument 10 is connected to the telescopic rod.

[0035] The positioning assembly includes a mounting cylinder 12 connected to the base 1 and a clamping positioning member disposed in the mounting cylinder 12. The clamping positioning member includes a mounting cavity 13 and a receiving cavity 14 formed on the mounting cylinder 12. The receiving cavity 14 communicates with the central cavity of the mounting cylinder 12. A sliding plate 15 is slidably connected to the mounting cylinder 12 in the mounting cavity 13. A retaining ring 16 extending into the receiving cavity 14 is connected to the sliding plate 15. A plurality of retaining balls 19 are engaged in the receiving cavity 14. An elastic member for pushing the sliding plate 15 is disposed in the mounting cavity 13. A pressing member for cooperating with the sliding plate 15 is disposed in the mounting cylinder 12.

[0036] As can be seen from the above, by setting a detection unit and a positioning component on the base 1, when measuring the perpendicularity of the shaft, the shaft can be inserted into the middle of the mounting cylinder 12. The elastic element lifts the slide plate 15 and the retaining ring 16 upward. The retaining ring 16 moves upward and inserts into the receiving cavity 14 to squeeze the retaining balls 19. Under the squeezing action of the retaining ring 16, multiple retaining balls 19 move towards the middle of the mounting cylinder 12, and part of the structure of the retaining balls 19 extends into the middle cavity of the mounting cylinder 12 to squeeze the shaft. Multiple retaining balls 19 cooperate with each other to hold the shaft, making the shaft vertical and making the shaft axis overlap with the axis of the mounting cylinder 12. Moreover, the contact area between the retaining balls 19 and the shaft is small, which can effectively reduce the influence of the retaining balls 19 on the shaft. At this time, the vertical shaft can be detected by the measuring instrument 10, which can effectively improve the detection accuracy of the shaft perpendicularity.

[0037] The connecting channel between the receiving cavity 14 and the mounting cylinder 12 is provided with a protrusion to prevent the retaining ball 19 from dislodging from the receiving cavity 14. When the retaining ring 16 is inserted into the receiving cavity 14, the retaining ring 16 pushes the retaining ball 19 outward. Under the action of the retaining ring 16 and the mounting cylinder 12, the retaining ball 19 abuts against the surface of the shaft. Moreover, multiple retaining balls 19 cooperate with each other to form a clamping surface. The retaining balls 19 push the shaft vertically and perpendicular to the clamping surface, so that the axis of the shaft overlaps with the axis of the mounting cylinder 12 as much as possible, thereby improving the accuracy of the shaft's perpendicularity measurement.

[0038] The elastic element includes a positioning post 18 connected to the mounting cylinder 12 and a spring 17 snapped onto the positioning post 18. One end of the spring 17 abuts against the bottom of the mounting cavity 13, and the other end abuts against the sliding plate 15. The positioning post 18 can prevent the spring 17 from moving, and the spring 17 can provide an upward thrust to the sliding plate 15, so that the sliding plate 15 maintains the upper position, which also makes the retaining ring 16 stably inserted into the receiving cavity 14, maintaining the limiting effect of the retaining ring 16 on the retaining ball 19.

[0039] The mounting cylinder 12 is equipped with multiple sets of clamping and positioning components along the axial direction inside. A bottom cone 26 is connected to the middle of the mounting cylinder 12. When the shaft is inserted into the mounting cylinder 12, the bottom of the shaft abuts against the bottom cone 26, and there is point contact between the shaft and the bottom cone 26. This can effectively reduce the impact of unevenness at the end of the shaft on the measurement of the shaft's perpendicularity. Furthermore, the cooperation of multiple clamping and positioning components can further improve the clamping stability of the shaft.

[0040] The mounting cylinder 12 has a side groove 20 on its side wall. The pressing component includes a pressure ring 21 and a connecting frame 22. The pressure ring 21 is located inside the mounting cavity 13 and is sleeved on the retaining ring 16. The end of the connecting frame 22 passes through the side groove 20 and is connected to the retaining ring 16. A sliding sleeve 23 is hinged to the connecting frame 22 through a hinge shaft. A rotating rod 24 is slidably connected in the sliding sleeve 23. One end of the rotating rod 24 is hinged to the base 1, and the other end is hinged to a handle 25.

[0041] Before inserting the shaft into the mounting cylinder 12, the handle 25 can be pressed down to rotate the rotating rod 24. The rotating rod 24 causes the sliding sleeve 23 to move down. The sliding sleeve 23 slides on the rotating rod 24. At this time, the sliding sleeve 23 will drive the pressure ring 21 to move down. The downward movement of the pressure ring 21 will drive the retaining ring 16 to move down. The retaining ring 16 and the sliding plate 15 move down to compress the spring 17. The retaining ring 16 moves down and disengages from the receiving cavity 14. After the retaining ball 19 is no longer restricted by the retaining ring 16, it moves into the receiving cavity 14. At this time, the retaining ball 19 can move freely in the receiving cavity 14. The inspector can then insert the shaft into the mounting cylinder 12. After the shaft is placed, the handle 25 is released. The compressed spring 17 returns to its original position and pushes the sliding plate 15 and retaining ring 16 upward, so that the retaining ring 16 is reinserted into the receiving cavity 14. The retaining ball 19 is pushed by the retaining ring 16 again. Part of the retaining ball 19 protrudes out of the receiving cavity 14 and abuts against the surface of the shaft, forming a clamping effect on the shaft.

[0042] To facilitate the upward movement of the retaining ring 16 and its insertion between the retaining ball 19 and the mounting cylinder 12, the upper end of the retaining ring 16 gradually narrows from the inside out.

[0043] Example 3:

[0044] This invention provides a verticality testing device for metrological verification, comprising a base 1, wherein the base 1 is provided with:

[0045] The detection unit includes a height adjustment component disposed on the base 1 and a telescopic rod disposed on the height adjustment component, wherein a measuring instrument 10 is connected to the telescopic rod.

[0046] The positioning assembly includes a mounting cylinder 12 connected to the base 1 and a clamping positioning member disposed in the mounting cylinder 12. The clamping positioning member includes a mounting cavity 13 and a receiving cavity 14 formed on the mounting cylinder 12. The receiving cavity 14 communicates with the central cavity of the mounting cylinder 12. A sliding plate 15 is slidably connected to the mounting cylinder 12 in the mounting cavity 13. A retaining ring 16 extending into the receiving cavity 14 is connected to the sliding plate 15. A plurality of retaining balls 19 are engaged in the receiving cavity 14. An elastic member for pushing the sliding plate 15 is disposed in the mounting cavity 13. A pressing member for cooperating with the sliding plate 15 is disposed in the mounting cylinder 12.

[0047] As can be seen from the above, by setting a detection unit and a positioning component on the base 1, when measuring the perpendicularity of the shaft, the shaft can be inserted into the middle of the mounting cylinder 12. The elastic element lifts the slide plate 15 and the retaining ring 16 upward. The retaining ring 16 moves upward and inserts into the receiving cavity 14 to squeeze the retaining balls 19. Under the squeezing action of the retaining ring 16, multiple retaining balls 19 move towards the middle of the mounting cylinder 12, and part of the structure of the retaining balls 19 extends into the middle cavity of the mounting cylinder 12 to squeeze the shaft. Multiple retaining balls 19 cooperate with each other to hold the shaft, making the shaft vertical and making the shaft axis overlap with the axis of the mounting cylinder 12. Moreover, the contact area between the retaining balls 19 and the shaft is small, which can effectively reduce the influence of the retaining balls 19 on the shaft. At this time, the vertical shaft can be detected by the measuring instrument 10, which can effectively improve the detection accuracy of the shaft perpendicularity.

[0048] The connecting channel between the receiving cavity 14 and the mounting cylinder 12 is provided with a protrusion to prevent the retaining ball 19 from dislodging from the receiving cavity 14. When the retaining ring 16 is inserted into the receiving cavity 14, the retaining ring 16 pushes the retaining ball 19 outward. Under the action of the retaining ring 16 and the mounting cylinder 12, the retaining ball 19 abuts against the surface of the shaft. Moreover, multiple retaining balls 19 cooperate with each other to form a clamping surface. The retaining balls 19 push the shaft vertically and perpendicular to the clamping surface, so that the axis of the shaft overlaps with the axis of the mounting cylinder 12 as much as possible, thereby improving the accuracy of the shaft's perpendicularity measurement.

[0049] The elastic element includes a positioning post 18 connected to the mounting cylinder 12 and a spring 17 snapped onto the positioning post 18. One end of the spring 17 abuts against the bottom of the mounting cavity 13, and the other end abuts against the sliding plate 15. The positioning post 18 can prevent the spring 17 from moving, and the spring 17 can provide an upward thrust to the sliding plate 15, so that the sliding plate 15 maintains the upper position, which also makes the retaining ring 16 stably inserted into the receiving cavity 14, maintaining the limiting effect of the retaining ring 16 on the retaining ball 19.

[0050] The mounting cylinder 12 is equipped with multiple sets of clamping and positioning components along the axial direction inside. A bottom cone 26 is connected to the middle of the mounting cylinder 12. When the shaft is inserted into the mounting cylinder 12, the bottom of the shaft abuts against the bottom cone 26, and there is point contact between the shaft and the bottom cone 26. This can effectively reduce the impact of unevenness at the end of the shaft on the measurement of the shaft's perpendicularity. Furthermore, the cooperation of multiple clamping and positioning components can further improve the clamping stability of the shaft.

[0051] The mounting cylinder 12 has a side groove 20 on its side wall. The pressing component includes a pressure ring 21 and a connecting frame 22. The pressure ring 21 is located inside the mounting cavity 13 and is sleeved on the retaining ring 16. The end of the connecting frame 22 passes through the side groove 20 and is connected to the retaining ring 16. A sliding sleeve 23 is hinged to the connecting frame 22 through a hinge shaft. A rotating rod 24 is slidably connected in the sliding sleeve 23. One end of the rotating rod 24 is hinged to the base 1, and the other end is hinged to a handle 25.

[0052] Before inserting the shaft into the mounting cylinder 12, the handle 25 can be pressed down to rotate the rotating rod 24. The rotating rod 24 causes the sliding sleeve 23 to move down. The sliding sleeve 23 slides on the rotating rod 24. At this time, the sliding sleeve 23 will drive the pressure ring 21 to move down. The downward movement of the pressure ring 21 will drive the retaining ring 16 to move down. The retaining ring 16 and the sliding plate 15 move down to compress the spring 17. The retaining ring 16 moves down and disengages from the receiving cavity 14. After the retaining ball 19 is no longer restricted by the retaining ring 16, it moves into the receiving cavity 14. At this time, the retaining ball 19 can move freely in the receiving cavity 14. The inspector can then insert the shaft into the mounting cylinder 12. After the shaft is placed, the handle 25 is released. The compressed spring 17 returns to its original position and pushes the sliding plate 15 and retaining ring 16 upward, so that the retaining ring 16 is reinserted into the receiving cavity 14. The retaining ball 19 is pushed by the retaining ring 16 again. Part of the retaining ball 19 protrudes out of the receiving cavity 14 and abuts against the surface of the shaft, forming a clamping effect on the shaft.

[0053] To facilitate the upward movement of the retaining ring 16 and its insertion between the retaining ball 19 and the mounting cylinder 12, the upper end of the retaining ring 16 gradually narrows from the inside out.

[0054] The height adjustment component includes a mounting shell 2 connected to the base 1, a motor 3 connected to the top of the mounting shell 2, and a lead screw 4 rotatably connected to the mounting shell 2. The lead screw 4 is connected to the output shaft of the motor 3. A lifting groove 5 is provided on the side wall of the mounting shell 2. A lifting plate 6 is threaded onto the lead screw 4. One end of the lifting plate 6 is engaged in the lifting groove 5 and connected to a telescopic rod. A scale 11 is provided on the mounting shell 2.

[0055] The telescopic rod includes a slide cylinder 7 connected to the lifting plate 6, a slide rod 8 slidably connected to the end of the slide cylinder 7, and a brake bolt 9 threadedly connected to the slide cylinder 7. The measuring instrument 10 is connected to the slide rod 8. To prevent the telescopic rod from deforming under gravity, both the slide cylinder 7 and the slide rod 8 are triangular prisms.

[0056] As can be seen from the above, after the shaft is vertically clamped, the sliding rod 8 makes the measuring end of the measuring instrument 10 abut against the surface of the shaft. Then, the brake bolt 9 is rotated to fix the extension and retraction state of the sliding rod 8 and the sliding cylinder 7, maintaining the contact state between the measuring instrument 10 and the shaft. The motor 3 is started to drive the lead screw 4 to rotate. The rotating lead screw 4 drives the lifting plate 6 to move up and down in the mounting shell 2. The lifting plate 6 then drives the measuring instrument 10 to move on the surface of the shaft through the telescopic rod, thereby measuring the perpendicularity of the shaft.

[0057] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A verticality testing device for metrological verification, comprising a base (1), characterized in that, The base (1) is provided with: The detection unit includes a height adjustment component disposed on the base (1) and a telescopic rod disposed on the height adjustment component, wherein a measuring instrument (10) is connected to the telescopic rod. The positioning assembly includes a mounting cylinder (12) connected to the base (1) and a clamping positioning member disposed in the mounting cylinder (12). The clamping positioning member includes a mounting cavity (13) and a receiving cavity (14) opened on the mounting cylinder (12). The receiving cavity (14) communicates with the central cavity of the mounting cylinder (12). A sliding plate (15) is slidably connected to the mounting cylinder (12) in the mounting cavity (13). A retaining ring (16) extending into the receiving cavity (14) is connected to the sliding plate (15). A plurality of retaining balls (19) are engaged in the receiving cavity (14). An elastic member for pushing the sliding plate (15) is provided in the mounting cavity (13). A pressing member for cooperating with the sliding plate (15) is provided in the mounting cylinder (12).

2. The verticality testing device for metrological verification according to claim 1, characterized in that, The connecting channel between the receiving cavity (14) and the mounting cylinder (12) is provided with a protrusion to prevent the ball (19) from falling out of the receiving cavity (14).

3. The verticality testing device for metrological verification according to claim 1, characterized in that, The elastic element includes a positioning post (18) connected to the mounting cylinder (12) and a spring (17) snapped onto the positioning post (18). One end of the spring (17) abuts against the bottom of the mounting cavity (13), and the other end abuts against the sliding plate (15).

4. The verticality testing device for metrological verification according to claim 1, characterized in that, The mounting cylinder (12) has multiple sets of clamping and positioning components arranged along the axial direction inside, and a bottom cone (26) is connected to the middle of the mounting cylinder (12).

5. The verticality testing device for metrological verification according to claim 1, characterized in that, The mounting cylinder (12) has a side groove (20) on its side wall. The pressing component includes a pressure ring (21) and a connecting frame (22). The pressure ring (21) is located inside the mounting cavity (13) and is sleeved on the retaining ring (16). The end of the connecting frame (22) passes through the side groove (20) and is connected to the retaining ring (16). A sliding sleeve (23) is hinged to the connecting frame (22) through a hinge shaft. A rotating rod (24) is slidably connected in the sliding sleeve (23). One end of the rotating rod (24) is hinged to the base (1), and the other end is hinged to a handle (25).

6. The verticality testing device for metrological verification according to claim 1, characterized in that, The upper end of the retaining ring (16) gradually narrows from the inside out.

7. The verticality testing device for metrological verification according to claim 1, characterized in that, The height adjustment component includes a mounting shell (2) connected to the base (1), a motor (3) connected to the top of the mounting shell (2), and a lead screw (4) rotatably connected in the mounting shell (2). The lead screw (4) is connected to the output shaft of the motor (3). A lifting groove (5) is provided on the side wall of the mounting shell (2). A lifting plate (6) is threaded onto the lead screw (4). One end of the lifting plate (6) is engaged in the lifting groove (5) and connected to a telescopic rod. A scale (11) is provided on the mounting shell (2).

8. A verticality testing device for metrological verification according to claim 7, characterized in that, The telescopic rod includes a slide cylinder (7) connected to the lifting plate (6), a slide rod (8) slidably connected to the end of the slide cylinder (7), and a brake bolt (9) threadedly connected to the slide cylinder (7). The measuring instrument (10) is connected to the slide rod (8). Both the slide cylinder (7) and the slide rod (8) are triangular prisms.

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