Standard ball device

Abstract

The utility model relates to a standard ball device, which comprises a fixed base, a guide rail, a ball cylinder and a ball cylinder, the fixed stand column is arranged on the fixed base; a driving rotation part; a driven rotating part; the multi-angle standard ball module is mounted on the driven rotating part, and a standard ball for checking the probe is assembled on the multi-angle standard ball module; the supporting stand column supports the multi-angle standard ball module, and the bottom of the supporting stand column is slidably located in the guide rail; the plurality of stop mechanisms are arranged corresponding to a plurality of verification positions of the standard ball, and each stop mechanism comprises a detection unit and a stop unit, and the detection units are used for detecting whether the supporting stand columns reach the verification positions or not; the stopping unit has an initial state of not stopping the supporting stand column and a stopping state of stopping the supporting stand column; the control unit is connected with the driving rotating part and the detection unit and used for controlling the stop unit to be switched between the initial state and the stop state. According to the utility model, the use of the standard ball under different verification conditions can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, in particular to a standard ball device. Background Art

[0002] At present, the calibration of the ruby ​​needle of three-coordinate measurement requires the use of a standard ball as a calibration instrument. The effective diameter of the three-coordinate measuring needle is obtained by calibrating the standard ball, and then the effective diameter of the measuring needle is used for measurement.

[0003] There are many types of special three-coordinate measuring probes, such as five-direction measuring probes and star-shaped measuring probes. When calibrating them, if all measuring probes are to be calibrated, it is necessary to use measuring probes in multiple directions, and the vector direction of the standard ball needs to be continuously changed to meet the requirements for the use of special measuring probes.

[0004] For example, for a five-direction stylus, when the measuring seat rotates 90 degrees or 180 degrees, there will always be interference between one or some of the stylus and the standard sphere, resulting in the standard sphere being unable to detect the stylus at that angle. Therefore, the direction of the standard sphere needs to be changed. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a standard ball device, which can satisfy the use of the standard ball in different calibration situations by rotating the standard ball at multiple angles in different planes.

[0006] In order to solve the above technical problems, the utility model proposes the following technical solutions:

[0007] The present application relates to a standard ball device, comprising:

[0008] A fixed base, the top surface of which is surrounded by a guide rail;

[0009] A fixed column, which is placed on the fixed base;

[0010] An active rotating part, located on the fixed column and used to provide a rotating force;

[0011] A driven rotating part, which is driven by the rotating force and rotates relative to the fixed column;

[0012] A multi-angle standard ball module is mounted on the driven rotating part, and a standard ball for calibrating the measuring needle is assembled on the multi-angle standard ball module;

[0013] A supporting column, which supports the multi-angle standard ball module and has a bottom that slides in the guide rail;

[0014] A plurality of stopper mechanisms are arranged corresponding to a plurality of calibration positions of the standard ball, and include a detection unit and a stopper unit for detecting whether the support column reaches the calibration position;

[0015] The stop unit has an initial state of not blocking the support column and a stop state of blocking the support column;

[0016] A control unit is connected to the active rotating part and the detection unit respectively, and is used to control the stop unit to switch between the initial state and the stop state.

[0017] In some embodiments of the present application, the multi-angle standard sphere module includes:

[0018] A multi-angle mounting module, which is mounted on the driven rotating part and has a plurality of mounting surfaces at different angles, and a mounting groove is provided on the mounting surface;

[0019] An inserting column has one end which can be inserted into the installation slot, and the other end of the column is fixed with the standard ball.

[0020] In some embodiments of the present application, the active rotating part includes a motor and an active connecting part, the motor outputs a rotational force, and its output shaft is connected to the active connecting part;

[0021] The driven rotating part is located below the active connecting part and includes a ring connecting part and at least one driven connecting part, and the ring connecting part is rotatably connected to the fixed column through a bearing;

[0022] When there are multiple driven connecting parts, the multiple driven connecting parts are arranged on the circumferential outer side wall of the ring connecting part at intervals and radially, and the free end of one of the driven connecting parts is connected to the multi-angle standard ball module, and a stopper perpendicular to the length direction of the driven connecting part connected to the multi-angle standard ball module is fixedly provided;

[0023] The length direction of the active connection part and the length direction of the driven connection part both extend in a direction perpendicular to the length direction of the support column, and a side surface of the active connection part abuts against the stopper.

[0024] In some embodiments of the present application, the bottom end of the supporting column is arc-shaped.

[0025] In some embodiments of the present application, a mounting opening is provided on one side of the multi-angle mounting module facing the driven rotating part;

[0026] The free end of the driven connection portion fixed with the stopper portion can be detachably inserted into the assembly opening.

[0027] In some embodiments of the present application, when there are multiple driven connecting parts, the angles formed between two adjacent driven connecting parts are the same.

[0028] In some embodiments of the present application, the detection unit is a gravity sensing unit, which is connected to the control unit, and the gravity sensing unit is arranged in a limiting groove formed by a recessed bottom wall of the guide rail, and the top surface of the gravity sensing unit is flush with the bottom wall of the guide rail;

[0029] The stopper unit comprises a hydraulic pipeline and a lifting mechanism, wherein the hydraulic pipeline contains liquid and comprises a telescopic portion, a supporting portion, and a connecting portion connecting the telescopic portion and the supporting portion, wherein the supporting portion is located below the gravity sensing unit, wherein when the hydraulic pipeline is in an initial state, the telescopic portion is retracted into the connecting portion;

[0030] After the gravity sensing unit senses the downward pressure of the support column, it squeezes the hydraulic pressure in the support portion, so that the telescopic portion extends from the connecting portion to the front side of the support column on its movement path;

[0031] The lifting mechanism is connected to the control unit and is used to control the lifting of the gravity sensing unit after the standard ball has calibrated the measuring needle, release the downward pressure on the supporting part, and reset the hydraulic pipeline to its initial state.

[0032] In some embodiments of the present application, the standard ball device further comprises:

[0033] A control cabinet button is used to control the operation of the lifting mechanism.

[0034] Compared with the prior art, the standard ball device provided by the present application has the following advantages and beneficial effects:

[0035] Through the active rotating part and the driven rotating part, the multi-angle standard ball module is moved along the guide rail under the support of the supporting column, and the standard ball is inserted according to the angle of the standard ball used. Then, at the calibration position where the standard ball needs to be calibrated, the supporting column is stopped by the stop mechanism to complete the calibration at the calibration position. When the calibration at the calibration position is completed, the stop mechanism can be changed to the initial state without blocking the supporting column. With this device, the use of standard balls at multiple angles can be realized, and the multi-angle calibration of the measuring needle can be completed.

[0036] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments of the utility model or the description of the prior art. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 This is a structural diagram of the standard ball device proposed by the utility model;

[0039] Figure 2 A top view of the standard ball device proposed by the utility model;

[0040] Figure 3 This is a structural diagram of the driven rotating part in the standard ball device proposed by the utility model;

[0041] Figure 4 This is a structural diagram of a multi-angle mounting module in a standard ball device proposed by the utility model;

[0042] Figure 5 for Figure 2 A cross-sectional view along the HH direction;

[0043] Figure 6 for Figure 5 Enlarged view of part E in the middle;

[0044] Figure 7 A structural diagram of the standard ball device proposed by the utility model from another perspective;

[0045] Figure 8 for Figure 7 Enlarged view of part F;

[0046] Reference numerals:

[0047] 110. Fixed base; 111. Guide rail; 120. Fixed column; 130. Driven rotating part; 131. Ring connecting part; 132. Driven connecting part; 140. Active rotating part; 141. Active connecting part; 150. Stopper; 160. Multi-angle standard ball module; 161. Multi-angle mounting module; 162. Insertion column; 163. Mounting groove; 170. Standard ball; 180. Support column; 190. Stopper mechanism; 191. Connecting part; 192. Telescopic part; 193. Supporting part; 194. Control cabinet button; 200. Gravity sensing unit. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0049] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0052] In order to realize calibration of a special measuring needle in multiple directions, the present application relates to a standard ball device, which can change the position of the standard ball 170 at multiple angles to meet the diameter calibration of the measuring needle in different directions, avoid manual adjustment of the standard ball 170, and improve calibration efficiency and accuracy.

[0053] The standard ball device includes a fixed base 110, a fixed column 120, an active rotating part 140, a driven rotating part 130, a multi-angle standard ball module 160, a supporting column 180, a plurality of stop mechanisms 190 and a control unit (not shown).

[0054] See also Figure 1 The fixed base 110 serves as a stable supporting seat for the entire standard ball device, and it can be a fixed platform.

[0055] The fixed column 120 is fixed on the fixed base 110 to support the active rotating part 140 . In some embodiments of the present application, the fixed base 110 is disc-shaped and the fixed column 120 is placed at the center of the disc-shaped fixed base 110 .

[0056] The active rotating part 140 actively outputs a rotational force. In some embodiments of the present application, the active rotating part 140 includes a motor (not shown) and an active connecting part 141 .

[0057] The motor outputs a rotational force when powered on; the active connection part 141 is connected to the output shaft of the motor, so that the active connection part 141 is driven to rotate when the motor is working.

[0058] In some embodiments of the present application, see Figure 1 and Figure 2 The rotation plane of the active connection part 141 is parallel to the plane where the disc-shaped fixed base 110 is located, that is, the length direction of the active connection part 141 extends in a direction perpendicular to the length direction of the fixed column 120.

[0059] The driven rotating part 130 serves as a driven component and rotates relative to the fixed column 120 under the drive of the active rotating part 140 .

[0060] In some embodiments of the present application, see Figure 1 and Figure 2 The driven rotating part 130 is also installed on the fixed column 120 and is located below the active rotating part 140 .

[0061] See also Figure 1 and Figure 3 The driven rotating portion 130 includes a ring connecting portion 131 and at least one driven connecting portion 132 .

[0062] The ring connecting portion 131 is rotatably connected to the fixed column 120 via a bearing (not shown). The bearing may include an inner bearing sleeve and an outer bearing sleeve rotatable relative to the inner bearing sleeve. The inner bearing sleeve is sleeved on the fixed column 120, and the ring connecting portion 131 is sleeved on the outer bearing sleeve, so that the ring connecting portion 131 can rotate relative to the fixed column 120.

[0063] See also Figure 3 The driven connection portion 132 is radially arranged on the outer circumferential side wall of the ring connection portion 131 and is located below the active connection portion 141 , and its length direction also extends in a direction perpendicular to the length direction of the fixed column 120 .

[0064] When there are a plurality of driven connection parts 132 , the plurality of driven connection parts 132 are radially arranged at intervals on the circumferential outer side wall of the ring connection part 131 .

[0065] Specifically, in order to ensure the stability of the driven rotating part 130, for the plurality of driven connecting parts 132, the angles formed between two adjacent driven connecting parts 132 are equal to each other, see Figure 2 .

[0066] See also Figure 1 and Figure 2 In some embodiments of the present application, four driven connecting parts 132 are provided, and the angle formed between every two adjacent driven connecting parts 132 is 90 degrees.

[0067] See also Figure 1 The multi-angle standard ball module 160 is installed on the driven rotating part 130 , and the standard ball 170 for calibrating the measuring needle is assembled on the multi-angle standard ball module 160 .

[0068] When the active rotating part 140 is working, it can drive the driven rotating part 130 and the multi-angle standard ball module 160 (and the standard ball 170 thereon) to rotate simultaneously.

[0069] In some embodiments of the present application, see Figure 1 and Figure 4 The multi-angle standard ball module 160 includes a multi-angle mounting module 161 and a mounting column 162 .

[0070] The multi-angle mounting module 161 is mounted on the driven rotating part 130 and has a plurality of mounting surfaces at different angles. Each mounting surface is provided with a mounting groove 163. One end of the insertion column 162 is inserted into the mounting groove 163 and the other end is fixed with the standard ball 170 as described above.

[0071] See also Figure 4 , which shows an octagonal body having a plurality of mounting surfaces, each of which is provided with a mounting groove 163 as described above.

[0072] The insertion column 162 can be pulled out from one installation groove 163 and inserted into another installation groove 163, so that the standard ball 170 can be adapted to the calibration of the measuring needle at different angles.

[0073] In some embodiments of the present application, in order to achieve stability of the standard ball 170, see Figure 1 The supporting column 180 is disposed on the multi-angle standard ball module 160 to support the multi-angle standard ball module 160 .

[0074] The bottom of the support column 180 slides along the guide rail 111. In this way, when the active rotating part 140 is working, the support column 180 moves along the guide rail 111 to enable the multi-angle standard ball module 160 to move around the fixed column 120, so as to facilitate calibration using the standard ball 170 at different angles.

[0075] In order to reduce the friction between the support column 180 and the guide rail 111 , the bottom end of the support column 180 is arc-shaped.

[0076] In order for the active rotating part 140 to drive the driven rotating part 130 to rotate during operation, see Figure 1 and Figure 3 A stopper 150 is provided on the driven connection portion 132 on which the multi-angle standard ball module 160 is installed, and the length direction of the stopper 150 extends in a direction perpendicular to the length direction of the driven connection portion 132 .

[0077] One side of the active connecting portion 141 abuts against the stopper 150, and the stopper 150 is used to enable the active rotating portion 140 to move along the driven rotating portion 130 when working. Figure 1 Rotate in the direction of the arrow shown.

[0078] As described above, an assembly opening (not shown) is provided on one side of the multi-angle standard ball module 160 facing the driven rotating portion 130 , and the free end of the driven connecting portion 132 fixed with the stopper 150 is inserted into the assembly opening.

[0079] When the standard ball 170 needs to be used for calibration, the standard ball 170 should be in a stationary state. When the angle needs to be changed for calibration of the standard ball 170, the standard ball 170 should be rotated so that the standard ball 170 rotates a certain angle to achieve calibration at different angles. Therefore, it is necessary to stop the support column 180 moving along the guide rail 111 during calibration, that is, to stop the movement of the standard ball 170.

[0080] For example, see Figure 1 The standard ball 170 is assembled on the outer mounting surface of the multi-angle mounting module 161, and the standard ball 170 needs to be calibrated at the calibration position A. Therefore, when the support column 180 moves to the calibration position A, the support column 180 should be prevented from moving. After the calibration at the calibration position A is completed, the support column 180 should not be prevented from moving.

[0081] Therefore, for multiple calibration positions ( Figure 1 and Figure 2 Four verification positions are shown as examples: verification position A, verification position B, verification position C and verification position D), and multiple stop mechanisms 190 are provided, wherein a stop mechanism 190 is provided corresponding to each verification position.

[0082] The stopping mechanism 190 has an initial state and a stopping state. In the initial state, the movement of the supporting column 180 is not stopped. In the stopping state, the movement of the supporting column 180 is blocked.

[0083] The control unit controls the stopper mechanism 190 to switch between an initial state and a stopper state.

[0084] In order to ensure that the support column 180 is stopped when it reaches the verification position and is not stopped when it is about to leave the verification position, the stopping mechanism 190 of the present application includes a detection unit and a stopping unit.

[0085] In some embodiments of the present application, see Figures 5 to 8 The detection unit may be a gravity sensing unit 200 for detecting whether the support column 180 reaches the verification position.

[0086] The gravity sensing unit 200 is arranged in a limiting groove (not shown) formed by a recessed arrangement on the bottom wall of the guide rail 111 , and its top surface is flush with the bottom wall of the guide rail 111 .

[0087] The supporting column 180 is driven by the active rotating part 140 to move along the guide rail 111 Figure 1 Movement in the direction of the arrow shown, when the support column 180 moves to the verification position A and presses down the gravity sensing unit 200, the gravity sensing unit 200 senses the downward pressure of gravity and detects that the support column 180 is in place. Otherwise, the support column 180 is not detected to be in place.

[0088] In some embodiments of the present application, the stop unit may include a hydraulic pipeline and a lifting mechanism to achieve an initial state and a stop state of the stop unit.

[0089] The hydraulic pipeline contains liquid, which can change the direction of liquid flow to form hydraulic pressure when under pressure.

[0090] In some embodiments of the present application, the hydraulic pipeline includes a telescopic portion 192 , a supporting portion 193 , and a connecting portion 191 connecting the telescopic portion 192 and the supporting portion 193 .

[0091] See also Figure 6 and Figure 8 The support portion 193 is located below the gravity sensing unit 200. When the support portion 193 is in an initial state without pressure, the telescopic portion 192 is retracted in the connecting portion 191. When the support portion 193 is in a pressure state with pressure, due to the presence of hydraulic pressure, the telescopic portion 192 extends from the connecting portion 191 to the front side of the movement path of the supporting column 180 (see Figure 6 and Figure 8 ), blocking the support column 180 from moving along the inner side of the guide rail 111 Figure 1 Go in the direction indicated by the arrow.

[0092] The support column 180 is driven by the active rotating part 140 to move along the guide rail 111. When the support column 180 moves to the calibration position and presses down the gravity sensing unit 200, the gravity sensing unit 200 senses the downward pressure, and thus moves downward to press down the support part 193 of the hydraulic pipeline, thereby extending the telescopic part 192 (see Figure 6 and Figure 8 ) and blocks the forward movement of the support column 180.

[0093] When the gravity sensing unit 200 senses gravity, it sends a signal to the control unit, and the control unit controls the active rotating part 140 to stop working. At this time, the active connecting part 141 cannot move either. Therefore, the upper active connecting part 141 blocks the multi-angle standard ball module 160 and the supporting column 180 from moving toward their movement path (i.e. Figure 1 The standard ball 170 moves to the rear side (in the direction of the arrow shown in FIG), and the lower stopper 150 blocks the support column 180 from moving toward the front side of the movement path, so that the standard ball 170 is stably located at the calibration position.

[0094] At this time, the probe is calibrated at the calibration position using the adjusted standard ball 170.

[0095] After the verification is completed, the control unit controls the lifting mechanism to lift the gravity sensing unit 200 so that it pushes out the bottom end of the support column 180. At this time, the gravity sensing unit 200 will not press down the support part 193 of the hydraulic pipeline without the support column 180 pressing down. Therefore, the telescopic part 192 retracts into the connecting part 191 (that is, it is reset to the initial state) and does not block the forward movement of the support column 180.

[0096] At the same time, the control unit will restart the active rotating part 140 so that the active rotating part 140 drives the multi-angle standard ball module 160 and the supporting column 180 to move forward along the guide rail 111 while ejecting the supporting column 180 .

[0097] In the present application, the lifting mechanism may use a telescopic cylinder disposed at a corresponding verification position.

[0098] After the calibration is completed at the calibration position, the control unit controls the telescopic cylinder to extend the cylinder rod to push out the gravity sensing unit 200 .

[0099] In the present application, a control cabinet button 194 may be provided to control the operation of the lifting mechanism to extend the cylinder rod to eject the gravity sensing unit 200 .

[0100] When the standard ball device is stopped, the active rotating part 140 may be stopped between the two calibration positions.

[0101] In some embodiments of the present application, the setting of the stop mechanism 190 may also adopt the following structure.

[0102] The detection unit as described above may also be a photoelectric switch disposed near the verification position for detecting whether the support column 180 is in place; in the initial state, the photoelectric unit does not detect the support column 180 .

[0103] The stop unit as described above may also be a telescopic cylinder arranged corresponding to the verification position.

[0104] The telescopic cylinder can be arranged on the inner side or the outer side of the guide rail 111, that is, as long as it can block the support column 180 from sliding forward when the telescopic rod is extended.

[0105] When the photoelectric switch detects that the support column 180 is in place, the control unit controls the cylinder rod of the telescopic cylinder to extend to prevent the support column 180 from sliding forward. At this time, the stop mechanism 190 is in a stop state.

[0106] In some embodiments of the present application, four calibration positions are set along the guide rail 111, see Figure 1 and Figure 2 , respectively at 0 degrees, 90 degrees, 180 degrees and 270 degrees of the annular guide rail 111.

[0107] Correspondingly, the stop mechanism 190 is also correspondingly arranged at the four checking positions.

[0108] The standard ball device involved in the present application can install the standard ball 170 on different mounting surfaces according to the requirements of the stylus calibration, and can change the calibration position by moving the standard ball 170 along the guide rail 111 according to the calibration angle of the stylus, thereby avoiding interference between the stylus and the standard ball 170 and realizing the calibration of the stylus at multiple angles.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A standard ball device, characterized in that: include: A fixed base, the top surface of which is surrounded by a guide rail; A fixed column, which is placed on the fixed base; An active rotating part, located on the fixed column and used to provide a rotating force; A driven rotating part, which is driven by the rotating force and rotates relative to the fixed column; A multi-angle standard ball module is mounted on the driven rotating part, and a standard ball for calibrating the measuring needle is assembled on the multi-angle standard ball module; A supporting column, which supports the multi-angle standard ball module and has a bottom that slides in the guide rail; A plurality of stopper mechanisms are arranged corresponding to a plurality of calibration positions of the standard ball, and include a detection unit and a stopper unit for detecting whether the support column reaches the calibration position; The stop unit has an initial state of not blocking the support column and a stop state of blocking the support column; A control unit is connected to the active rotating part and the detection unit respectively, and is used to control the stop unit to switch between the initial state and the stop state.

2. The standard ball device according to claim 1, characterized in that: The multi-angle standard ball module comprises: A multi-angle mounting module, which is mounted on the driven rotating part and has a plurality of mounting surfaces at different angles, and a mounting groove is provided on the mounting surface; An inserting column has one end which can be inserted into the installation slot, and the other end of the column is fixed with the standard ball.

3. The standard ball device according to claim 2, characterized in that: The active rotating part includes a motor and an active connecting part, the motor outputs a rotational force, and its output shaft is connected to the active connecting part; The driven rotating part is located below the active connecting part and includes a ring connecting part and at least one driven connecting part, and the ring connecting part is rotatably connected to the fixed column through a bearing; When there are multiple driven connecting parts, the multiple driven connecting parts are arranged on the circumferential outer side wall of the ring connecting part at intervals and radially, and the free end of one of the driven connecting parts is connected to the multi-angle standard ball module, and a stopper perpendicular to the length direction of the driven connecting part connected to the multi-angle standard ball module is fixedly provided; The length direction of the active connection part and the length direction of the driven connection part both extend in a direction perpendicular to the length direction of the support column, and a side surface of the active connection part abuts against the stopper.

4. The standard ball device according to claim 1, characterized in that: The bottom end of the supporting column is arc-shaped.

5. The standard ball device according to claim 3, characterized in that: The multi-angle mounting module is provided with an assembly opening on one side surface facing the driven rotating part; The free end of the driven connection portion fixed with the stopper portion can be detachably inserted into the assembly opening.

6. The standard ball device according to claim 3, characterized in that: When there are a plurality of driven connecting portions, the angles formed between two adjacent driven connecting portions are the same as each other.

7. The standard ball device according to claim 1, characterized in that: The detection unit is a gravity sensing unit, which is connected to the control unit. The gravity sensing unit is arranged in a limiting groove formed by a recessed bottom wall of the guide rail, and the top surface of the gravity sensing unit is flush with the bottom wall of the guide rail; The stopper unit comprises a hydraulic pipeline and a lifting mechanism, wherein the hydraulic pipeline contains liquid and comprises a telescopic portion, a supporting portion, and a connecting portion connecting the telescopic portion and the supporting portion, wherein the supporting portion is located below the gravity sensing unit, wherein when the hydraulic pipeline is in an initial state, the telescopic portion is retracted into the connecting portion; After the gravity sensing unit senses the downward pressure of the support column, it squeezes the hydraulic pressure in the support portion, so that the telescopic portion extends from the connecting portion to the front side of the support column on its movement path; The lifting mechanism is connected to the control unit and is used to control the lifting of the gravity sensing unit after the standard ball has calibrated the measuring needle, release the downward pressure on the supporting part, and reset the hydraulic pipeline to its initial state.

8. The standard ball device according to claim 7, characterized in that: The standard ball device also includes: A control cabinet button is used to control the operation of the lifting mechanism.

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