CN215338179U - Laser tracker coordinate positioning auxiliary device - Google Patents

Abstract

The utility model discloses a coordinate positioning auxiliary device of a laser tracker, which comprises: the device comprises a shell, a target ball, a positioning device and a control device, wherein an installation space is arranged in the shell, a concave part suitable for placing the target ball is arranged on the bottom wall of the shell, a through hole penetrating through the bottom wall of the shell is formed in the concave part, and a perspective window is formed in the side wall of the shell; the positioning rod penetrates through the shell, one end of the positioning rod is provided with a dotting part, the other end of the positioning rod is provided with an operating part, the positioning rod can move between a first position and a second position along the axial direction of the shell, the dotting part is spaced from the concave part at the first position, and the target ball is placed in the concave part and is opposite to the perspective window; in the second position, the dotting part is suitable for penetrating through the opening to dot on the surface of the measured component. According to the coordinate positioning auxiliary device of the laser tracker, the coordinate value to be positioned can be obtained through target ball measurement, and the dotting part of the positioning rod after positioning can mark the position through dotting, so that the precision of positioning the surface coordinate position of the part to be detected can be improved.

Description

Laser tracker coordinate positioning auxiliary device

Technical Field

The utility model relates to the field of laser ranging, in particular to a coordinate positioning auxiliary device of a laser tracker.

Background

In general, especially for large components, the surface of the component such as a threaded hole, a welding accessory, a support and the like needs to be coordinate-positioned, a machine tool does not have a corresponding operating space, and a laser tracker needs to be used in cooperation with a coordinate positioning auxiliary device.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a coordinate positioning auxiliary device of a laser tracker, which can enable a target ball of the laser tracker to directly contact the surface of a part when measuring a positioning coordinate, the measured coordinate value represents a coordinate value needing to be positioned, and a dotting part of a positioning rod after positioning can mark the position through dotting, belonging to point positioning, so that the problem that the traditional marker pen is poor in positioning precision due to large point area caused by point tracing is avoided, and the improvement of the precision of positioning the coordinate position on the surface of the part to be measured is facilitated.

The laser tracker coordinate positioning auxiliary device comprises: the device comprises a shell, a target ball, a positioning device and a control device, wherein an installation space is arranged in the shell, a concave part suitable for placing the target ball is arranged on the bottom wall of the shell, a through hole penetrating through the bottom wall of the shell is formed in the concave part, and a perspective window is arranged on the side wall of the shell; the positioning rod penetrates through the shell, a dotting part is arranged at one end of the positioning rod, an operating part is arranged at the other end of the positioning rod, the dotting part is located in the installation space, the operating part is located outside the shell, the positioning rod can move between a first position and a second position along the axial direction of the shell, the dotting part is spaced from the concave part at the first position, and the target ball is placed in the concave part and is opposite to the perspective window; in the second position, the dotting part is suitable for penetrating through the through opening to dot on the surface of the measured component.

According to the coordinate positioning auxiliary device of the laser tracker, the positioning rod can be controlled to move to the first position to enable the hitting portion to be spaced from the concave portion, the target ball is placed in the concave portion and is opposite to the transparent window, the coordinate positioning auxiliary device can be continuously moved until the coordinate positioning auxiliary device is moved to a required coordinate position, the position of the coordinate positioning auxiliary device is kept unchanged, the target ball is taken out, the positioning rod is controlled to move to the second position, the hitting portion penetrates through the through opening to hit a point on the surface of a measured part, the point is the target coordinate position, therefore, the target ball of the laser tracker can be directly contacted with the surface of the part when measuring the positioning coordinate, the measured coordinate value represents the coordinate value to be positioned, meanwhile, the hitting portion of the positioning rod after positioning can mark the position through the hitting, belongs to point positioning, and the problem that the point area is large due to the point tracing of a traditional marker pen is avoided, The positioning precision is poor, and the precision of positioning the surface coordinate position of the part to be measured is improved.

In some embodiments of the utility model, the laser tracker coordinate positioning assistance device further comprises: the positioning rod is arranged in the mounting space, the guide shaft sleeve is arranged on the positioning rod and is elastically connected with the positioning rod, the guide shaft sleeve is suitable for being in sliding fit with the inner side wall of the mounting space, the positioning rod is provided with a third position, the third position is located between the first position and the second position, the guide shaft sleeve is abutted to the bottom wall of the shell in the third position, and a gap exists between the dotting part and the tested part.

In some embodiments of the utility model, the outer peripheral wall of the positioning rod is provided with a convex ring, the convex ring is located on one side of the guide shaft sleeve, which is far away from the concave part, and a first elastic piece is arranged between the convex ring and the guide shaft sleeve.

In some embodiments of the utility model, the laser tracker coordinate positioning assistance device further comprises: a second resilient member disposed between the collar and the top wall of the housing.

In some embodiments of the utility model, the laser tracker coordinate positioning assistance device further comprises: and the third elastic piece is arranged between the guide shaft sleeve and the top wall of the shell.

In some embodiments of the present invention, a limiting slot is disposed at the perspective window, the positioning rod is provided with a positioning protrusion, and in the first position, the limiting slot is adapted to be engaged with the positioning protrusion.

In some embodiments of the present invention, the number of the transparent windows is two, and the two transparent windows are disposed opposite to each other in a radial direction of the housing.

In some embodiments of the utility model, the laser tracker coordinate positioning assistance device further comprises: the linear shaft sleeve is fixed on the top wall of the shell and provided with a guide hole, and the positioning rod is rotatably and movably connected with the guide hole.

In some embodiments of the present invention, the bottom wall of the housing is provided with a magnetic member adapted to magnetically cooperate with the target ball.

In some embodiments of the present invention, the magnetic attracting member is plural, and the plural magnetic attracting members are arranged at intervals in a circumferential direction of the concave portion.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic front view of a laser tracker coordinate positioning aid in accordance with one embodiment of the present invention;

FIG. 2 is a schematic side view of FIG. 1;

FIG. 3 is a cross-sectional schematic view at A-A in FIG. 2 with the positioning rod in a third position;

FIG. 4 is a cross-sectional schematic view of the laser tracker coordinate positioning assistance device of FIG. 1 with the locating bar in a first position.

Reference numerals:

a coordinate positioning assistance device 100;

a housing 10; an upper cover 11; a framework 12; a recessed portion 13; a see-through window 14; a limit card slot 141; a through opening 15;

a positioning rod 20; a dotting part 21; an operation section 22; a convex ring 23; a positioning boss 24;

a guide bush 30;

a first elastic member 40;

a second elastic member 50;

a third elastic member 60;

a linear bushing 70; a guide hole 71;

a magnetic attraction member 80; a clamp spring 90;

target ball 200.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

Referring to fig. 1 and 2, a laser tracker coordinate positioning assistance apparatus 100 according to an embodiment of the present invention may include: a housing 10 and a positioning rod 20.

Referring to fig. 3, a mounting space is provided in the casing 10, a recess 13 adapted to receive the target ball 200 is provided in a bottom wall of the casing 10, the recess 13 is provided with a through hole 15 penetrating through the bottom wall of the casing 10, and a transparent window 14 is provided in a side wall of the casing 10. For example, the housing 10 includes an upper cover 11 and a frame 12 (see fig. 2), a concave portion 13 is provided in the center of the bottom of the frame 12, the concave portion 13 is opened with a spherical crown shaped concave surface corresponding to the target ball 200 with a diameter of 0.5 inch, the tangent of the spherical crown shaped concave surface is tangent to the bottom surface of the frame 12, the through hole 15 is formed on the concave portion 13 and penetrates through the bottom wall of the frame 12, so that when the target ball 200 is mounted on the spherical crown shaped concave surface, the target ball 200 is attached to the spherical crown shaped concave surface, and the portion of the target ball 200 leaks out of the bottom surface of the frame 12 through the through hole 15 and is attached to the object to be measured, and the target ball 200 is disposed opposite to the see-through window 14.

Referring to fig. 3, the positioning rod 20 is inserted into the housing 10, one end of the positioning rod 20 has a dotting portion 21, the other end of the positioning rod 20 has an operating portion 22, the dotting portion 21 is located in the installation space, and the operating portion 22 is located outside the housing 10, for example, the operating portion 22 may be a fixed ball socket, the fixed ball socket is connected with the positioning rod 20 through a screw thread, and the fixed ball socket is detachable from the positioning rod 20.

Referring to fig. 3 and 4, the positioning rod 20 is movable in the axial direction of the housing 10 between a first position (see fig. 4) in which the striking portion 21 is spaced apart from the recessed portion 13 and the target ball 200 is placed in the recessed portion 13 and opposed to the see-through window 14; in the second position (see fig. 3), the dotting portion 21 is adapted to pass through the opening 15 to dot the surface of the part under test.

For example, in the process of coordinate positioning, the positioning rod 20 can be controlled to move to a first position, so that the dotting part 21 is spaced from the concave part 13, then the target ball 200 is placed in the concave part 13 and is opposite to the transparent window 14, so as to facilitate the alignment during the measurement of the laser tracker, at this time, the coordinate positioning auxiliary device 100 can be continuously moved until the coordinate positioning auxiliary device is moved to a required coordinate position, then the position of the coordinate positioning auxiliary device 100 is kept unchanged, the target ball 200 is taken out, then the positioning rod 20 is controlled to move to a second position, the dotting part 21 passes through the through hole 15 to dotte on the surface of the measured part, the point is the target coordinate position, therefore, the target ball 200 of the laser tracker can be directly contacted with the surface of the part when measuring the positioning coordinate, the measured coordinate value represents the coordinate value required to be positioned, and the dotting part 21 of the positioning rod 20 after the positioning can mark the position through dotting, the method belongs to point positioning, avoids large point area and poor positioning precision caused by point tracing of a traditional marker pen, and is favorable for improving the precision of positioning the surface coordinate position of the part to be measured.

Alternatively, in some examples, the dotting portion 21 may be formed as a conical tip so that the positioning accuracy of the coordinate positioning assistance device 100 is within 0.1 mm.

In actual research, the inventor finds that the laser tracker coordinate positioning auxiliary device mainly has two types: one is to open a round hole at the center of the bottom of the target seat, and the other is to match the target seat with a conical tip punching device. The disadvantages of both techniques are:

1) the center of the bottom of the target seat is provided with a round hole device, and the defects are as follows: the holes are required to be painted and dotted by using a marking pen, the area of a positioning point is large, and the positioning precision is not high (about 0.5 mm).

2) The target seat matches and cooperates the perforating device disadvantage of the awl point: the distance between the center of a target ball (the center of laser positioning measurement) of the device and the surface of the component is large (generally about 50 mm), the measurement position of a laser tracker is equivalent to 50mm from the surface, and the laser tracker is vertical to the surface of the component by default and cannot accurately represent the coordinate position theoretically required by the surface of the component.

In view of this, according to the laser tracker coordinate positioning auxiliary device 100 of the embodiment of the present invention, during the coordinate positioning process, the positioning rod 20 is controlled to move to the first position so as to space the dotting portion 21 from the recessed portion 13, then the target ball 200 is placed in the recessed portion 13 and opposite to the transparent window 14, so as to facilitate the alignment during the laser tracker measurement, at this time, the coordinate positioning auxiliary device 100 can be continuously moved until the coordinate position is moved to the desired coordinate position, then the position of the coordinate positioning auxiliary device 100 is kept unchanged, the target ball 200 is taken out, then the positioning rod 20 is controlled to move to the second position, the dotting portion 21 passes through the opening 15 to dotte on the surface of the measured component, which is the target coordinate position, thereby, when the laser tracker target ball 200 measures the positioning coordinate, the measured coordinate value directly contacts the surface of the component, and the measured coordinate value represents the coordinate value to be positioned, meanwhile, the dotting part 21 of the positioning rod 20 after positioning can mark the position by dotting, which belongs to point positioning, thereby avoiding large point area and poor positioning precision caused by traditional marking pen point tracing, and being beneficial to improving the precision of positioning the surface coordinate position of the part to be measured.

In some embodiments of the present invention, and as illustrated with reference to FIG. 3, the laser tracker coordinate positioning assistance device 100 further comprises: the guide shaft sleeve 30 is provided on the positioning rod 20 and elastically connected to the positioning rod 20, the guide shaft sleeve 30 is adapted to be slidably fitted to an inner side wall of the installation space, the positioning rod 20 has a third position (as shown in fig. 3) between the first position and the second position, the guide shaft sleeve 30 abuts against a bottom wall of the housing 10 at the third position, and a gap is formed between the dotting portion 21 and the measured member.

It can be understood that, when the positioning rod 20 moves from the first position to the second position, the guide sleeve 30 moves along with the positioning rod 20, when the guide sleeve moves to abut against the inner bottom wall of the framework 12, the positioning rod 20 moves to the third position, at this time, a gap exists between the dotting portion 21 and the measured component, the positioning rod 20 can be prevented from rapidly falling to the component to be measured to damage the dotting portion 21, and a user can press the operating portion 22 to move the positioning rod 20 to the second position, so as to dotte the measured component to determine a target coordinate position, thereby not only realizing dotting on the measured component, but also avoiding damaging the dotting portion 21, and being beneficial to improving the working reliability of the laser tracker coordinate positioning auxiliary device 100.

In some embodiments of the present invention, referring to fig. 3, the outer peripheral wall of the positioning rod 20 is provided with a convex ring 23, the convex ring 23 is located on the side of the guide sleeve 30 away from the concave portion 13, and a first elastic member 40 is provided between the convex ring 23 and the guide sleeve 30. For example, the first elastic member 40 may be a wave spring plate, and the first elastic member 40 is connected between the lower surface of the protruding ring 23 and the upper surface of the guide sleeve 30, but the present invention is not limited thereto, and the first elastic member 40 may be other types of elastic members having a buffering function, such as a rectangular spring plate. Therefore, when the positioning rod 20 moves from the first position to the third position, the first elastic member 40 can play a role in buffering, so that the positioning rod 20 can be further prevented from rapidly falling to a component to be detected to damage the dotting part 21, and the service life of the dotting part 21 can be prolonged, and when the operating part 22 is pressed by a hand, the positioning rod 20 can move from the third position to the second position to complete dotting; when the human hand releases the positioning rod 20, the first elastic piece 40 drives the positioning rod 20 to return to the third position from the second position, and the operation is convenient.

In some embodiments of the present invention, and as illustrated with reference to FIG. 3, the laser tracker coordinate positioning assistance device 100 further comprises: and a second elastic member 50, the second elastic member 50 being disposed between the convex ring 23 and the top wall of the housing 10. For example, the second elastic member 50 may be a spring member, and the second elastic member 50 is disposed between the convex ring 23 and the upper cap 11. From this, when locating lever 20 moved to the third position by the first position, second elastic component 50 can play the cushioning effect to be favorable to further avoiding locating lever 20 to fall to the part that awaits measuring fast and cause the damage to dotting part 21, be favorable to prolonging the life of dotting part 21.

In some embodiments of the present invention, and as illustrated with reference to FIG. 3, the laser tracker coordinate positioning assistance device 100 further comprises: and a third elastic member 60, the third elastic member 60 being provided between the guide boss 30 and the top wall of the housing 10. For example, as shown in fig. 3, the third elastic member 60 may be a spring member, the third elastic member 60 being disposed around the second elastic member 50, the third elastic member 60 being disposed between the guide boss 70 and the upper cover 11. It can be understood that, through setting up third elastic component 60, at the first position, third elastic component 60 is in compression state, and when locating lever 20 and below spacing draw-in groove 141 break away from the cooperation, locating lever 20 can return the third position automatically under the effect of third elastic component 60, and convenient operation is favorable to improving the efficiency of coordinate positioning.

In some embodiments of the present invention, referring to fig. 1 and 2, the transparent window 14 is provided with a position-limiting slot 141, the positioning rod 20 is provided with a positioning protrusion 24, and in the first position, the position-limiting slot 141 is adapted to be engaged with the positioning protrusion 24. It can be understood that, in the first position (see fig. 4), the positioning rod 20 can be limited by the engagement of the limiting slot 141 and the positioning protrusion 24, so as to find a desired coordinate position by using the target ball 200, and when the positioning rod 20 needs to move from the first position to the second position, the positioning rod 20 can be rotated by a certain angle to disengage the limiting slot 141 and the positioning protrusion 24.

In some examples, as shown in fig. 1 and 2, the two transmission windows 14 are provided, and the two transmission windows 14 are arranged opposite to each other in the radial direction of the casing 10. It will be appreciated that when target ball 200 is placed in recess 13, target ball 200 is positioned opposite two see-through windows 14, thereby facilitating alignment by the laser tracker. For example, in some examples, the two opposite sides of the frame 12 are both provided with the perspective windows 14, each perspective window 14 is provided with one limiting clamping groove 141, the number of the positioning protrusions 24 is two, and in the first position, the two limiting clamping grooves 141 and the two positioning protrusions 24 are matched in a one-to-one correspondence manner.

In some embodiments of the present invention, the laser tracker coordinate positioning assistance device 100 further comprises: the linear shaft sleeve 70, the linear shaft sleeve 70 is fixed on the top wall of the housing 10, the linear shaft sleeve 70 has a guide hole 71, and the positioning rod 20 is rotatably and movably connected with the guide hole 71. For example, the linear bushing 70 is fixed to the upper cover 11 by the snap spring 90, and a certain gap is formed between the outer circumferential wall of the positioning rod 20 and the inner circumferential wall of the guide hole 71, so that the positioning rod 20 can move in the longitudinal direction of the guide hole 71 and can rotate relative to the guide hole 71. Therefore, the positioning rod 20 can be conveniently moved and rotated, and the structure is simple and the cost is low.

In some embodiments of the present invention, referring to FIG. 3, the bottom wall of the housing 10 is provided with a magnetic attraction member 80, and the magnetic attraction member 80 is adapted to magnetically cooperate with the target ball 200. For example, the magnetically attractive element 80 may be a magnet. It can be understood that, by providing the magnetic attraction member 80 adapted to magnetically cooperate with the target ball 200, the target ball 200 can be reliably positioned during the process of continuously moving the coordinate positioning assisting device 100, which is beneficial to ensuring the reliability of searching the coordinate.

In some embodiments of the present invention, referring to fig. 3, the magnetic attracting element 80 is plural, and the plural magnetic attracting elements 80 are arranged at intervals in the circumferential direction of the concave portion 13. For example, there are three magnetic attraction pieces 80, the three magnetic attraction pieces 80 are uniformly spaced apart in the circumferential direction of the concave portion 13, and an included angle between two adjacent magnetic attraction pieces 80 in the circumferential direction of the concave portion 13 is 120 °. This is advantageous in further ensuring the reliability of the coordinate positioning support device 100 in positioning the target ball 200.

Other constructions and operations of the laser tracker coordinate positioning assistance device 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A laser tracker coordinate positioning assist device, comprising:

the device comprises a shell, a target ball, a positioning device and a control device, wherein an installation space is arranged in the shell, a concave part suitable for placing the target ball is arranged on the bottom wall of the shell, a through hole penetrating through the bottom wall of the shell is formed in the concave part, and a perspective window is arranged on the side wall of the shell;

the positioning rod penetrates through the shell, a dotting part is arranged at one end of the positioning rod, an operating part is arranged at the other end of the positioning rod, the dotting part is located in the installation space, the operating part is located outside the shell, the positioning rod can move between a first position and a second position along the axial direction of the shell, the dotting part is spaced from the concave part at the first position, and the target ball is placed in the concave part and is opposite to the perspective window; in the second position, the dotting part is suitable for penetrating through the through opening to dot on the surface of the measured component.

2. The laser tracker coordinate positioning aid of claim 1 further comprising:

the positioning rod is arranged in the mounting space, the guide shaft sleeve is arranged on the positioning rod and is elastically connected with the positioning rod, the guide shaft sleeve is suitable for being in sliding fit with the inner side wall of the mounting space, the positioning rod is provided with a third position, the third position is located between the first position and the second position, the guide shaft sleeve is abutted to the bottom wall of the shell in the third position, and a gap exists between the dotting part and the tested part.

3. The laser tracker coordinate positioning assistance device of claim 2, wherein the outer peripheral wall of the positioning rod is provided with a convex ring, the convex ring is located on a side of the guide bush facing away from the concave portion, and a first elastic member is provided between the convex ring and the guide bush.

4. The laser tracker coordinate positioning aid of claim 3 further comprising:

a second resilient member disposed between the collar and the top wall of the housing.

5. The laser tracker coordinate positioning aid of claim 2 further comprising:

and the third elastic piece is arranged between the guide shaft sleeve and the top wall of the shell.

6. The laser tracker coordinate positioning auxiliary device of claim 1, wherein the perspective window is provided with a limiting clamping groove, the positioning rod is provided with a positioning protrusion, and in the first position, the limiting clamping groove is suitable for being clamped and matched with the positioning protrusion.

7. The laser tracker coordinate positioning aid of claim 1, wherein the number of the transparent windows is two, and the two transparent windows are disposed opposite to each other in a radial direction of the housing.

8. The laser tracker coordinate positioning aid of claim 1 further comprising:

the linear shaft sleeve is fixed on the top wall of the shell and provided with a guide hole, and the positioning rod is rotatably and movably connected with the guide hole.

9. The laser tracker coordinate positioning aid of any of claims 1 to 8, wherein the bottom wall of the housing is provided with a magnetically attractive member adapted to magnetically engage the target ball.

10. The laser tracker coordinate positioning assistance device of claim 9, wherein the plurality of magnetically attracted members are arranged at intervals in a circumferential direction of the recessed portion.

Images