Chuck

Abstract

The invention provides a chuck which comprises a first chuck mechanism, a second chuck mechanism, a thread adapter and a sliding block, the first chuck mechanism is detachably connected to a supporting mechanism, the second chuck mechanism is arranged above the first chuck mechanism, and the thread adapter is arranged above the second chuck mechanism and used for installing a measuring instrument. The sliding block is arranged between the second chuck mechanism and the first chuck mechanism and used for limiting rotation and movement of the thread adapter in the axial direction. According to the invention, the precision measuring instrument is fixed on a tripod, a magnetic chuck and other manufacturing mechanisms, so that a plurality of types of measuring instruments such as a laser tracker, a measuring arm, a theodolite and the like can be compatible. Meanwhile, a sliding block is arranged between the second chuck mechanism and the first chuck mechanism, so that rotation and movement of the thread adapter in the axial direction can be limited. Through cooperation of the cup head bolts and the threaded holes and cooperation of the elastic pins and the third pin holes, quick disassembly and replacement of the second chuck mechanism and the first chuck mechanism can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of mechanical technology, and particularly to a chuck. Background Art

[0002] When currently mainstream precision measuring instruments are in use, they need to be fixed on a special tripod or a special magnetic chuck. However, there is currently no chuck that can be quickly disassembled and replaced, and the chucks of some measuring instruments are not compatible with measuring instruments of other brands. Among them, the precision measuring instrument can be a measuring instrument whose measurement accuracy level reaches a preset level, such as a measuring instrument reaching the micron level or the nanometer level. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a chuck for solving the problem of the lack of a quick-release chuck in the prior art.

[0004] To achieve the above object and other related objects, the present invention provides a chuck, including:

[0005] A first chuck mechanism, detachably connected to a support mechanism;

[0006] A second chuck mechanism, disposed above the first chuck mechanism;

[0007] A threaded adapter, disposed above the second chuck mechanism for installing a measuring instrument;

[0008] A slider, disposed between the second chuck mechanism and the first chuck mechanism for restricting the rotation and movement of the threaded adapter in the axial direction.

[0009] Optionally, the chuck further includes: a first wrench for detachably connecting the first chuck mechanism to the support mechanism;

[0010] The first chuck mechanism is symmetrically provided with first pin holes, and the first wrench is connected to the first chuck mechanism through a cylindrical pin inserted into the first pin holes;

[0011] Wherein, the cylindrical pin and the first pin holes are in interference fit, and the first wrench and the cylindrical pin are in clearance fit.

[0012] Optionally, the inner wall of the lower end of the first chuck mechanism is provided with internal threads;

[0013] When the force direction of the first wrench is clockwise, the first wrench rotates clockwise around the cylindrical pin, and the first wrench locks the internal threads to detachably connect the first chuck mechanism to the support mechanism;

[0014] When the force direction of the first wrench is counterclockwise, the first wrench rotates counterclockwise around the cylindrical pin, and the first wrench loosens the internal thread to loosen the first chuck mechanism from the support mechanism.

[0015] Optionally, a ball screw is provided at the tail end of the first wrench, and a second pin hole is provided at the top of the first chuck mechanism;

[0016] When the ball screw moves to the second pin hole, the pressure of the ball in the ball screw decreases, the ball rises and is caught in the second pin hole, and the first wrench is fixed to the side wall of the first chuck mechanism.

[0017] Optionally, a threaded hole and a third pin hole are correspondingly provided at the top of the first chuck mechanism and the bottom of the second chuck mechanism. A semi-circular head bolt is inserted into the threaded hole, and a spring pin is inserted into the third pin hole. Through the cooperation of the semi-circular head bolt and the threaded hole and the cooperation of the spring pin and the third pin hole, the second chuck mechanism is limited and fixed above the first chuck mechanism.

[0018] Optionally, the first chuck mechanism is further provided with a first through hole. A flat washer is provided on the bottom step surface of the first through hole. A spring is provided outside the flat washer, and a slider is provided outside the spring. A second through hole is provided on the slider. A half-threaded hexagon socket head bolt is attached to the slider through the second through hole to limit the rotation and movement of the threaded adapter in the axial direction.

[0019] Optionally, a first groove is further provided on the side wall of the first chuck mechanism. A cushion block is provided at the first groove. An arc groove is provided on the end face of the cushion block away from the first chuck mechanism. A second wrench is further provided on the cushion block, and the second wrench makes a rotational movement at the arc groove;

[0020] The second wrench is further provided with a wrench pin hole. A second groove is provided at the wrench pin hole. A half-threaded hexagon socket head bolt is provided in the second groove. Part of the thread of the half-threaded hexagon socket head bolt is screwed into the hammer nut screw, and the hammer nut screw is installed on the second wrench.

[0021] Optionally, an external thread is provided at the upper end of the threaded adapter, and the measuring instrument is installed on the threaded adapter by matching with the external thread;

[0022] A threaded adapter through hole for applying torque is further provided on the side wall of the threaded adapter. After applying a preset torque, the threaded adapter and the measuring instrument are locked.

[0023] Optionally, a circumferential trapezoidal boss is provided inside the threaded adapter;

[0024] When the second chuck mechanism includes a trapezoidal boss, the diameter of the circumferential trapezoidal boss on the threaded adapter is greater than the diameter of the trapezoidal boss on the second chuck mechanism.

[0025] Optionally, the support mechanism includes a tripod or a magnetic chuck; and / or, the measuring instrument includes a laser tracker, a measuring arm or a theodolite.

[0026] As described above, the present invention provides a chuck, which has the following beneficial effects: it can be detachably connected to a support mechanism such as a tripod or a magnetic chuck through the first chuck mechanism, the second chuck mechanism is arranged above the first chuck mechanism, and the threaded adapter for installing the measuring instrument is arranged above the second chuck mechanism, which can be compatible with multiple types of measuring instruments such as laser trackers, measuring arms, and theodolites. At the same time, by arranging a slider between the second chuck mechanism and the first chuck mechanism, the rotation and movement of the threaded adapter in the axial direction can be restricted. In addition, through the cooperation of the semi-circular head bolt and the threaded hole and the cooperation of the elastic pin and the third pin hole, the quick disassembly and replacement of the second chuck mechanism and the first chuck mechanism can be realized. Description of the Drawings

[0027] Figure 1 is the front view of the chuck;

[0028] Figure 2 is Figure 1 the sectional view taken along the B-B direction of the middle chuck;

[0029] Figure 3 is the top view state diagram of the chuck;

[0030] Figure 4 is the three-dimensional view of the chuck;

[0031] Figure 5 is the exploded view of the chuck. Detailed Embodiments

[0032] The following uses specific specific examples to illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0034] Please refer to Figures 1 to 5 as shown in the figure, the present invention provides a chuck, including:

[0035] A first chuck mechanism 1, detachably connected to the support mechanism. As an example, the support mechanism in the present invention includes, but is not limited to, a tripod, a magnetic chuck, etc.

[0036] A second chuck mechanism 2, disposed above the first chuck mechanism 1;

[0037] A threaded adapter 3, disposed above the second chuck mechanism 2, for installing a measuring instrument. As an example, the measuring instrument in the present invention includes, but is not limited to, a measuring instrument with a measurement accuracy level reaching a preset level, such as a measuring instrument reaching the micron level or the nanometer level. Specifically, the measuring instrument in the present invention can be a laser tracker, a measuring arm, a theodolite, etc.

[0038] A slider 4, disposed between the second chuck mechanism 2 and the first chuck mechanism 1, for restricting the rotation and movement of the threaded adapter 3 in the axial direction.

[0039] In an exemplary embodiment, the chuck further includes: a first wrench 7, for detachably connecting the first chuck mechanism 1 to the support mechanism; the first chuck mechanism 1 is symmetrically provided with a first pin hole 13A, and by inserting a cylindrical pin 13 into the first pin hole 13A, the first wrench 7 can be connected to the first chuck mechanism 1. Among them, the cylindrical pin 13 and the first pin hole 13A are in interference fit, and the first wrench 7 and the cylindrical pin 13 are in clearance fit.

[0040] In an exemplary embodiment, an internal thread 1A is provided on the inner wall of the lower end of the first chuck mechanism 1; when the force direction of the first wrench 7 is clockwise, the first wrench 7 rotates clockwise around the cylindrical pin 13, and the first wrench 7 locks the internal thread 1A to detachably connect the first chuck mechanism 1 to the support mechanism; when the force direction of the first wrench 7 is counterclockwise, the first wrench 7 rotates counterclockwise around the cylindrical pin 13, and the first wrench 7 loosens the internal thread 1A to loosen the first chuck mechanism 1 from the support mechanism.

[0041] In an exemplary embodiment, a ball screw 9 is provided at the tail end of the first wrench 7, and a second pin hole 9A is provided at the top of the first chuck mechanism 1; when the ball screw 9 is displaced to the position where the second pin hole 9A is located, the ball pressure in the ball screw 9 decreases. At the same time, the ball rises and is caught in the second pin hole 9A, and the first wrench 7 is fixed to the side wall of the first chuck mechanism 1.

[0042] In an exemplary embodiment, threaded holes 14A and third pin holes 15A are correspondingly provided at the top of the first chuck mechanism 1 and the bottom of the second chuck mechanism 2. A button head bolt 14 is inserted into the threaded hole 14A, and a spring pin 15 is inserted into the third pin hole 15A. By the cooperation of the button head bolt 14 and the threaded hole 14A, and by the cooperation of the spring pin 15 and the third pin hole 15A, the second chuck mechanism 2 is limited and fixed above the first chuck mechanism 1. Using the spring pin 15 for connection can withstand axial loads and absorb vibrations and impacts, reduce the influence of environmental factors on the measurement accuracy, simplify the assembly, be easy to disassemble, and improve the assembly efficiency.

[0043] In an exemplary embodiment, the first chuck mechanism 1 is further provided with a first through hole 1B. A flat washer 12 is provided on the bottom step surface of the first through hole 1B. A spring 11 is provided outside the flat washer 12. A slider 4 is provided outside the spring 11. A second through hole is provided on the slider 4. A half-threaded socket head cap screw 10 is attached to the slider 4 through the second through hole, restricting the rotation and movement of the thread adapter 3 in the axial direction.

[0044] In an exemplary embodiment, a first groove 6A is further provided on the side wall of the first chuck mechanism 1. A spacer 6 is provided at the first groove 6A. An arc groove is provided on the end face of the spacer 6 away from the first chuck mechanism 1. A second wrench 5 is further provided on the spacer 6. The second wrench 5 rotates at the arc groove; the second wrench 5 is further provided with a wrench pin hole. A second groove is provided at the wrench pin hole. A half-threaded socket head cap screw 10 is provided in the second groove. A part of the thread of the half-threaded socket head cap screw 10 is screwed into the hammer nut screw 8, and the hammer nut screw 8 is installed on the second wrench 5.

[0045] In an exemplary embodiment, an external thread 3C is provided at the upper end of the thread adapter 3. The measuring instrument is installed on the thread adapter 3 by mating with the external thread 3C; a thread adapter through hole 3A for applying torque is further provided on the side wall of the thread adapter 3. After applying a preset torque, the thread adapter 3 and the measuring instrument are locked.

[0046] In an exemplary embodiment, a circumferential trapezoidal boss 3B is provided inside the thread adapter 3; when the second chuck mechanism 2 includes a trapezoidal boss, the diameter of the circumferential trapezoidal boss 3B on the thread adapter 3 is larger than the diameter of the trapezoidal boss on the second chuck mechanism 2.

[0047] According to the above description, in a specific example, such asFigures 1 to 5 As shown, when the support mechanism is a tripod or a magnetic chuck, and the measuring instrument is a laser tracker, a measuring arm or a theodolite, there are: The first chuck mechanism 1 is fixedly installed on the tripod or the magnetic chuck, and there is an internal thread 1A on the inner wall of the lower part of the first chuck mechanism 1. A second chuck mechanism 2 is arranged above the first chuck mechanism 1, a slider 4 is arranged between the first chuck mechanism 1 and the second chuck mechanism 2, and a thread adapter 3 is arranged above the second chuck mechanism 2. That is, along the vertical direction, from bottom to top are the first chuck mechanism 1, the slider 4, the second chuck mechanism 2, and the thread adapter 3.

[0048] Four threaded holes 14A and two third pin holes 15A are correspondingly arranged at the top of the first chuck mechanism 1 and the bottom of the second chuck mechanism 2, and the second chuck mechanism 2 is fixed and positioned by a button head bolt 14 and a spring pin 15. Using the spring pin 15 to connect the first chuck mechanism 1 and the second chuck mechanism 2 can bear axial loads and absorb vibrations and impacts, reduce the influence of environmental factors on the measurement accuracy, and simplify the assembly, making it easy to disassemble and improving the assembly efficiency.

[0049] Two first pin holes 13A are symmetrically arranged on the first chuck mechanism 1 respectively. A cylindrical pin 13 can be inserted into each first pin hole 13A to connect the first wrench 7 and the first wrench 7A. The first wrench 7 is used to fix the quick-release chuck to the tripod or the magnetic chuck. By turning the first wrench 7 clockwise with force, the internal thread 1A under the first chuck mechanism 1 can be locked. By turning the first wrench 7A counterclockwise with force, the internal thread 1A of the first chuck mechanism 1 can be loosened, and the quick-release chuck can be removed from the tripod or the magnetic chuck. The cylindrical pin 13 and the first pin hole 13A are in interference fit, and the first wrench 7 and the cylindrical pin 13 are in clearance fit. The first wrench 7 can rotate around the cylindrical pin 13. A ball plunger screw 9 is arranged at the end of the first wrench 7. Two second pin holes 9A are symmetrically arranged at the top of the first chuck mechanism 1 respectively. When the first wrench 7 is rotated and the ball plunger screw 9 is displaced to the second pin hole 9A, the pressure of the ball in the ball plunger screw 9 decreases, the ball rises and is stuck in the second pin hole 9A, and the first wrench 7 is fixed.

[0050] The first chuck mechanism 1 is provided with a first groove 6A, and the spacer 6 is fixedly installed on the first chuck mechanism 1 through the first groove 6A. The second wrench 5 is arranged on the spacer 6. An arc groove is arranged on the spacer 6 to cooperate with the second wrench 5, and the second wrench 5 can rotate at the arc groove. A wrench pin hole is arranged on the second wrench 5, and a second groove is arranged at the wrench pin hole of the second wrench 5. The second groove can hold a half-threaded hexagon socket head bolt 10. Part of the thread of the half-threaded hexagon socket head bolt 10 is screwed into the hammer nut screw 8, and the hammer nut screw 8 is installed on the second wrench 5.

[0051] The first chuck mechanism 1 is provided with a first through hole 1B for installing components to lock a precision measuring instrument. A flat washer 12 is arranged on the bottom step surface of the first through hole 1B, a spring 11 is arranged outside the flat washer 12, a slider 4 is arranged outside the spring 11, and a second through hole is arranged on the slider 4. The half-threaded socket head cap screw 10 passes through the second through hole on the slider 4 and fits with the slider 4. That is, along the horizontal straight line direction of the half-threaded socket head cap screw 10, the leftmost end is the hammer nut screw 8 and the second wrench 5, and then in sequence to the right are the spacer 6, the first chuck mechanism 1, the flat washer 12, the spring 11, and the slider 4.

[0052] Inside the thread adapter 3, there is a circumferential trapezoidal boss 3B similar to the slider 4 and the second chuck mechanism 2. The diameter of the trapezoidal boss of the thread adapter 3 is slightly larger than the diameter of the trapezoidal boss of the second chuck mechanism 2, which is convenient for installing the thread adapter 3 onto the second chuck mechanism 2. An external thread 3C is arranged at the upper end of the thread adapter 3, and the external thread 3C can cooperate with the measuring instrument for fixation. A thread adapter through hole 3A is arranged on the cylindrical surface of the thread adapter 3, and a torque can be applied by passing an M6 socket head wrench through the thread adapter through hole 3A to lock the measuring instrument and the thread adapter 3.

[0053] According to the above description, the working process of the chuck in the present invention can be as follows: When using a precision measuring instrument with a threaded interface, the chuck is installed on a tripod or a magnetic chuck, and the first wrench 7 is turned clockwise to lock the chuck at this time. The precision measuring instrument is installed on the thread adapter 3 through the external thread, and a torque is applied through the thread adapter through hole 3A to lock the precision measuring instrument and the thread adapter 3. The second wrench 5 is opened, the hammer nut screw 8 moves towards the spacer 6, driving the half-threaded socket head cap screw 10 to move backward. At this time, the pressure of the spring 11 decreases, and the compression amount of the spring 11 decreases, causing the slider 4 to move backward along the half-threaded socket head cap screw 10. At this time, the precision measuring instrument equipped with the thread adapter 3 is placed on the second chuck mechanism 2, and then the second wrench 5 is closed, driving the slider 4 to move forward. The circumferential trapezoidal boss at the front end of the slider 4 fits with the circumferential trapezoidal boss 3B of the thread adapter 3, causing the thread adapter 3 to move forward. When the circumferential trapezoidal boss 3B at the other end of the thread adapter 3 fits with the circumferential trapezoidal boss 3B of the second chuck mechanism 2, the radial contact surface of the circumferential trapezoidal boss 3B restricts the displacement freedom and rotation of the thread adapter 3 on the plane, and the axial contact surface restricts the axial displacement of the thread adapter 3. The pressure exerted by the slider 4 on the thread adapter 3 restricts the axial rotation and movement of the thread adapter 3. When using a precision measuring instrument with a circumferential trapezoidal boss 3B structure, the thread adapter 3 is removed, the measuring instrument is directly placed on the second chuck mechanism 2, and then the second wrench 5 is closed. At this time, the precision measuring instrument is locked.

[0054] In summary, the present invention provides a chuck that can be detachably connected to support mechanisms such as tripods and magnetic chucks through a first chuck mechanism. A second chuck mechanism is arranged above the first chuck mechanism, and a threaded adapter for installing a measuring instrument is arranged above the second chuck mechanism, which can be compatible with multiple types of measuring instruments such as laser trackers, measuring arms, and theodolites. At the same time, by arranging a slider between the second chuck mechanism and the first chuck mechanism, the rotation and movement of the threaded adapter in the axial direction can be restricted. In addition, through the cooperation of the semi-circular head bolt and the threaded hole and the cooperation of the elastic pin and the third pin hole, the quick disassembly and replacement of the second chuck mechanism and the first chuck mechanism can be achieved.

[0055] It can be understood that the above embodiments are only illustrative of the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

[0056] The structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0057] It can be understood that although terms such as first, second, and third may be used in the present invention to describe pin holes, etc., these pin holes should not be limited to these terms. These terms are only used to distinguish the pin holes from each other. For example, without departing from the scope of the embodiments of the present invention, the first pin hole can also be called the second pin hole, and similarly, the second pin hole can also be called the first pin hole.

Claims

1. A chuck, characterized in that: Included are: A first chuck mechanism (1) is detachably connected to the support mechanism; A second chuck mechanism (2) is arranged above the first chuck mechanism (1); A threaded adapter (3) is arranged above the second chuck mechanism (2) and is used for mounting a measuring instrument; A slider (4) is arranged between the second chuck mechanism (2) and the first chuck mechanism (1) and is used to limit the rotation and movement of the threaded adapter (3) in the axial direction.

2. The chuck according to claim 1, characterized in that The chuck also includes: A first wrench (7) used for detachably connecting the first chuck mechanism (1) to the support mechanism; The first chuck mechanism (1) is symmetrically provided with first pin holes (13A), and the first wrench (7) is connected to the first chuck mechanism (1) via a cylindrical pin (13) inserted into the first pin hole (13A); The cylindrical pin (13) and the first pin hole (13A) are in interference fit, and the first wrench (7) and the cylindrical pin (13) are in clearance fit.

3. The chuck according to claim 2, characterized in that The inner wall of the lower end of the first chuck mechanism (1) is provided with an internal thread (1A); When the force direction of the first wrench (7) is clockwise, the first wrench (7) rotates clockwise around the cylindrical pin (13), and the first wrench (7) locks the internal thread (1A), so that the first chuck mechanism (1) is detachably connected to the support mechanism; When the force direction of the first wrench (7) is counterclockwise, the first wrench (7) rotates counterclockwise around the cylindrical pin (13), and the first wrench (7) loosens the internal thread (1A) to loosen the first chuck mechanism (1) from the support mechanism.

4. The chuck according to claim 2 or 3, characterized in that: A ball screw (9) is provided at the tail end of the first wrench (7), and a second pin hole (9A) is provided at the top of the first chuck mechanism (1); When the ball screw (9) moves to the second pin hole (9A), the ball pressure in the ball screw (9) decreases, the ball rises and is clamped into the second pin hole (9A), and the first wrench (7) is fixed to the side wall of the first chuck mechanism (1).

5. The chuck according to claim 1, characterized in that A threaded hole (14A) and a third pin hole (15A) are correspondingly arranged at the top of the first chuck mechanism (1) and the bottom of the second chuck mechanism (2); a semicircular head bolt (14) is inserted into the threaded hole (14A), and an elastic pin (15) is inserted into the third pin hole (15A); the second chuck mechanism (2) is limitedly fixed above the first chuck mechanism (1) by the cooperation between the semicircular head bolt (14) and the threaded hole (14A) and the cooperation between the elastic pin (15) and the third pin hole (15A).

6. The chuck according to claim 1, characterized in that The first chuck mechanism (1) is also provided with a first through hole (1B), a flat washer (12) is provided on the bottom step surface of the first through hole (1B), a spring (11) is provided on the outside of the flat washer (12), the slider (4) is provided on the outside of the spring (11), a second through hole is provided on the slider (4), a semi-threaded hexagon socket bolt (10) is fitted with the slider (4) through the second through hole, so as to limit the axial rotation and movement of the threaded adapter (3).

7. The chuck according to claim 1 or 6, characterized in that: The side wall of the first chuck mechanism (1) is also provided with a first groove (6A), a cushion block (6) is provided at the first groove (6A), an arc groove is provided at the end surface of the cushion block (6) away from the first chuck mechanism (1), a second wrench (5) is also provided on the cushion block (6), and the second wrench (5) performs a rotational motion at the arc groove; The second wrench (5) is also provided with a wrench pin hole, the wrench pin hole is provided with a second groove, the second groove is provided with a semi-threaded hexagon socket bolt (10), the semi-threaded hexagon socket bolt (10) is partially threaded into the hammer nut screw (8), and the hammer nut screw (8) is installed on the second wrench (5).

8. The chuck according to claim 1, characterized in that The upper end of the threaded adapter (3) is provided with an external thread (3C), and the measuring instrument is mounted on the threaded adapter (3) by cooperating with the external thread (3C); The side wall of the threaded adapter (3) is also provided with a threaded adapter through hole (3A) for applying a torque, and after a preset torque is applied, the threaded adapter (3) and the measuring instrument are locked.

9. The chuck according to claim 1 or 8, characterized in that: The threaded adapter (3) is provided with a circumferential trapezoidal boss (3B) inside; When the second chuck mechanism (2) includes a trapezoidal boss, the diameter of the circumferential trapezoidal boss (3B) on the threaded adapter (3) is greater than the diameter of the trapezoidal boss on the second chuck mechanism (2).

10. The chuck according to claim 1, characterized in that The supporting mechanism includes a tripod or a magnetic suction cup; And / or, the measuring instrument includes a laser tracker, a measuring arm or a theodolite.

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