KR20220162263A - High-Precision 3 dimensional coordinate measuring machine - Google Patents

Abstract

The present invention relates to a highly precise three-dimensional measurement device which more precisely controls a posture for horizontal alignment while previously installed on a horizontally distorted installation surface to secure subject measurement accuracy of the three-dimensional measurement device requesting high precision. According to the present invention, the highly precise three-dimensional measurement device comprises: a base where an x-axis rail is formed in an upper portion thereof; an x-axis movement unit connected to the x-axis rail to be installed to reciprocate in an x-axis direction and having a y-axis rail formed in an upper portion thereof; a y-axis movement unit connected to the y-axis rail to be installed to reciprocate in a y-axis direction and having a z-axis rail formed on a front side thereof; and a z-axis movement unit connected to the z-axis rail to be installed to reciprocate in a z-axis direction and supporting a probe.

Description

High-Precision 3 dimensional coordinate measuring machine

The present invention relates to a high-precision three-dimensional measuring device, and more particularly, to a high-precision three-dimensional measuring device capable of more precisely and easily adjusting a posture for horizontal alignment in a state in which it is already installed on an installation surface.

In general, in a 3D measuring machine, a sensor capable of detecting the surface position of an object to be measured moves around the object to detect and calculate the coordinates of a measuring point of the object to be measured, thereby deriving the size, position, direction, etc. of the object to be measured as data. It is a device that

The data measured by the 3D measuring machine is used to evaluate processing precision through comparison with pre-designed shape dimensions, or is used for reverse engineering of products without design data such as drawings.

Three measurement methods of a vision system including a touch probe, a laser sensor, and a vision camera are mainly adopted and used as the measurement method of a 3D measuring machine, which is divided into a contact method and a non-contact method.

A touch probe, which is a contact method, can obtain precise measurement information, and a laser sensor, which is a non-contact method, is a linear measurement method, and has fast measurement speed and high precision.

In a general 3D measuring device, a detector (probe) measures the position, distance, direction, etc. by reading spatial coordinate values of the object to be measured, and can move the detector in 3D so that the detector can move the 3D space around the object to be measured. Have a structure that includes the means to be

In a conventional 3D measuring machine, a main body is provided with an encoder for moving a detector on x, y and z spatial coordinates and measuring the amount of movement, in which a surface plate for placing an object to be measured is supported on the upper part of the base, and the main body is It is composed of a detector that is moved in spatial coordinates by a sensor and generates a signal by being in contact with an object to be measured, and a controller that mathematically calculates the position of the object to be measured and its coordinates.

When the detector is moved by the body, the movement coordinates of the detector are measured in real time by a linear encoder, and the measured coordinate values of the detector are used as data for determining the relative position of the detector in the measurement space.

Since a 3D measuring machine usually requires a high degree of precision, if the installation surface of the installation space is not level, the alignment of the probe becomes poor, and the measuring accuracy of the measuring machine is significantly reduced. Due to the clearance and tolerance between each part constituting the probe, the alignment of the probe may be slightly misaligned, and due to the structure of the measuring instrument, it is difficult to easily correct such misalignment.

Republic of Korea Patent Registration No. 10-1656256 Republic of Korea Patent Publication No. 10-2019-0025205

The present invention was created to solve this in view of the various problems in the prior art, so that the posture for horizontal alignment can be more precisely adjusted even when it is already installed on a horizontally distorted installation surface, thereby requiring a high degree of precision. An object of the present invention is to provide a high-precision three-dimensional measuring device that guarantees measurement accuracy of a measuring instrument.

The present invention is a means for achieving the above object, the base on which the x-axis rail is formed; an x-axis moving unit connected to the x-axis rail, installed to be reciprocally movable in the x-axis direction, and having a y-axis rail formed thereon; a y-axis moving unit connected to the y-axis rail and installed to be reciprocally movable in the y-axis direction and having a z-axis rail formed forward; and a z-axis moving unit connected to the z-axis rail and installed to be reciprocally movable in the z-axis direction and supporting a probe, wherein the y-axis moving unit includes a y-axis frame forwardly supporting the z-axis rail ; and a y-axis guider module installed between the y-axis frame and the y-axis rail, connected to the y-axis rail, and adjusting the level of the y-axis frame.

In addition, the y-axis rails are provided in pairs formed on the left and right sides of the x-axis moving unit, and the y-axis guider modules are provided in plurality to be connected to the pair of y-axis rails, respectively.

In addition, the plurality of y-axis guider modules may include a first y-axis guider module connected to a left y-axis rail; A second y-axis guider module connected to the right y-axis rail; and a third y-axis guider module connected to at least one of the left y-axis rail and the right y-axis rail.

In addition, each of the plurality of y-axis guider modules includes a cylinder integrally formed on a side surface of the y-axis frame and through which an adjustment member having a screw thread in the vertical direction is formed; a fixing bolt coupled to the control unit in a screwing manner and having a through-hole threaded in a vertical direction at the center; a support bracket for supporting a y-axis guide block disposed at a lower portion of the cylinder at a predetermined distance, having a screw-threaded fixture formed on the upper surface, and connected to the y-axis rail at a lower portion; and a fixing pin inserted into the through-hole in a screwing manner and having a lower end exposed below the fixing bolt and fixed to the fixture in a screwing manner.

In addition, the y-axis moving unit further includes an encoder unit installed between the y-axis frame and the y-axis rail to detect a movement amount of the y-axis moving unit, wherein the encoder unit is provided in parallel with the y-axis rail a read header connected to the scale to read the reference of the scale; and a header support member supporting a read header on the y-axis frame, wherein the header support member includes: an encoder bracket extending from the y-axis frame toward the outside of the scale; fastening bolts fastened by mutually penetrating the encoder bracket and the lead header; and a movable bolt disposed eccentrically with the fastening bolt and in contact with the surface of the lead header while penetrating the encoder bracket, wherein the z-axis moving unit is installed on a path of the z-axis rail, a z-axis motor for rotating a screw shaft extending in the z-axis direction; a holder for supporting the z-axis guide block connected to the z-axis rail to the rear and the probe to the front; and a fracture inducing member installed between the screw shaft and the holder to induce fracture when the holder moves in the z-axis direction and interferes.

The present invention provides the following effects.

First, the user can adjust the horizontality by adjusting the inclination of the y-axis movable part by rotating only each fixing bolt while checking the horizontal state of the y-axis movable part with the naked eye, thereby greatly improving work convenience.

Second, it is possible to further improve the contact sensitivity between the encoder part and the scale by allowing the user to finely adjust the distance between the read header and the scale, and as a result, the movement amount of the y-axis moving part can be detected more accurately. there is

Third, when an external force is generated due to unnecessary interference during the z-axis movement of the z-axis moving part, arbitrary fracture of the fracture inducing member is induced at the connection point between the holder and the screw shaft, thereby preventing deformation or damage of the z-axis rail and screw shaft in advance. And at the same time, since only the lost fractured bolt needs to be replaced with a new one, there is an advantage in that the ease of maintenance is greatly improved.

1 is a view showing the appearance of a high-precision three-dimensional measuring device according to the present invention.
Figure 2 is a view showing the appearance of the main components of the high-precision three-dimensional measuring device according to the present invention from which the case is removed.
Fig. 3 is a front view of Fig. 2;
Figure 4 is a view showing one side of Figure 2;
Fig. 5 is a plan view of Fig. 2;
Fig. 6 is an enlarged view of a main part of Fig. 2;
7 is a view showing an exploded configuration of a base, an x-axis moving unit, and a y-axis moving unit;
8 is a view showing an exploded configuration of the y-axis guider module.
9 is a view schematically showing a cross-sectional configuration of a y-axis guider module.
Fig. 10 is a diagram showing an exploded configuration of an encoder unit;
11 is a diagram schematically showing a cross-sectional configuration of an encoder unit;
12 is a diagram showing the operation of an encoder unit;
13 to 14 are diagrams showing an exploded configuration of a z-axis moving unit.
15 is a diagram schematically showing the front of the main part of the z-axis moving part.
16 is a view showing the action of the fracture inducing member.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the examples described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer explanation. It should be noted that in each drawing, the same members are sometimes indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

As shown in FIGS. 1 to 5, the 3D measuring device according to the present invention includes a base 10, an x-axis moving unit 20, a y-axis moving unit 100 and a z-axis moving unit 200 can be defined as

First, the base 10 supports the x-axis moving unit 20 upward, and may be seated and installed on the surface plate 30 on which the object to be measured is placed.

At this time, the object to be measured can be automatically supplied to the surface plate 30 while seated on the measuring jig through the supply line 40 installed in connection with the surface plate 30, and the object to be measured is supplied to the fixed position of the surface plate 30. Then, the operation of the 3D measuring device starts.

When the object to be measured is placed on the surface plate 30, the x, y, and z-axis moving parts 20, 100, and 200 move the probe 240 installed on the z-axis moving part 200 so that it comes into contact with the surroundings of the object to be measured. The principle of measuring the three-dimensional coordinates of the water, measuring the three-dimensional coordinates of the object to be measured, and calculating and processing the measured coordinates into data is well known, so a detailed description thereof will be omitted.

At the top of the base 10, x-axis rails 11 may be formed in a line along the x-axis direction, and the x-axis moving unit 20 is connected to the x-axis rail 11 to reciprocate in the x-axis direction. can be moved Although the reference numerals are not written together, the base 10 may include a power generating means such as a linear motor for linearly moving the x-axis moving unit 20, and since this can be referenced from well-known matters, a detailed description is omitted. do.

The x-axis moving unit 20 is connected to the x-axis rail 11 formed on the upper part of the base 10 and is installed to be reciprocally movable in the x-axis direction. That is, movement of the probe 240 in the x-axis direction may be performed by movement of the x-axis moving unit 20 in the x-axis direction.

Above the x-axis moving unit 20, y-axis rails 21 may be formed in a line along the y-axis direction, and the y-axis moving unit 100 is connected to the y-axis rail 21 to form a y-axis can be moved in either direction. At this time, the y-axis rails 21 may be provided as a pair formed on the left and right sides of the x-axis moving unit 20, respectively.

An x-axis guide block 23 that is connected to the x-axis rail 11 and can slide along the x-axis rail 11 may be formed on the lower surface of the x-axis moving unit 20 .

Like the above-described base 10, the x-axis moving unit 20 may include a power generating means such as a linear motor for linearly moving the y-axis moving unit 100, although reference numerals are not indicated, which It is the same as the known information.

Since the three-dimensional measuring device according to the present invention has a main feature in the structure of the y-axis moving unit 100 and the z-axis moving unit 200 to be described later, hereinafter, with reference to the accompanying drawings, the y-axis moving unit 100 and the z-axis moving unit 100 The axis moving unit 200 will be described in detail.

First, the y-axis moving unit 100 is connected to the y-axis rail 21 formed on the upper part of the x-axis moving unit 20 and is installed to be reciprocally movable in the y-axis direction. That is, movement of the probe 240 in the y-axis direction may be performed by movement of the y-axis moving unit 100 in the y-axis direction. A z-axis rail 111 may be formed in front of the y-axis moving unit 100 to guide movement of the z-axis moving unit 200 in the z-axis direction.

More specifically, the y-axis moving unit 100 is installed between the y-axis frame 110 supporting the z-axis rail 111 forward and the y-axis frame 110 and the y-axis rail 21 Connected to the y-axis rail 21, it may be illustrated as including a y-axis guider module 120 for adjusting the horizontality of the y-axis frame 110.

The y-axis frame 110 is in charge of the overall frame of the y-axis moving unit 100 and supports the y-axis guider module 120 left and right. At this time, a plurality of y-axis guider modules 120 are provided on the left and right sides of the y-axis frame 110 to be connected to the pair of y-axis rails 21, respectively, to maintain the left and right balance of the y-axis moving unit 100. The y-axis frame 110 may be configured to be connected to a linear motor provided in the x-axis moving unit 20.

The y-axis guider module 120 is slidably connected on the y-axis rail 21 while spacing the y-axis frame 110 upward with respect to the x-axis moving unit 20 at a predetermined interval, thereby forming the x-axis moving unit 20 When the linear motor is operated, the y-axis moving unit 100 can move back and forth along the y-axis direction.

At the same time, the y-axis guider module 120 has a structure capable of correctly correcting the distorted horizontality of the y-axis moving unit 100 by enabling the user to adjust the 3D measuring device when the left and right or front and rear are displaced. Accordingly, the horizontality of the z-axis moving unit 200 and the probe 240 supported by the z-axis moving unit 200 may be adjusted in association with the horizontal adjustment of the y-axis moving unit 100 .

To this end, the y-axis guider module 120 is integrally formed on the side surface of the y-axis frame 110, as shown in FIG. ), a fixing bolt 122 coupled to the adjuster 121a in a screwing manner and having a through-hole 122a threaded vertically in the center, disposed at a predetermined distance below the cylinder 121, A screw coupling method to the support bracket 123 supporting the y-axis guide block 123b connected to the y-axis rail 21 and the through-hole 122a with a screw-threaded fixture 123a formed on the upper surface and a lower portion It is inserted into and may be illustrated as including a fixing pin 124 whose lower end is exposed downward of the fixing bolt 122 and is fixed to the fixture 123a by screwing.

The adjusting part 121a formed in the cylinder 121 may be formed by completely penetrating the cylinder 121 in the vertical direction, and the fixing bolt 122 having a thread formed in the adjusting part 121a is first inserted in a screwing manner. In the coupled state, the fixing pin 124 having a thread formed on the through hole 122a of the fixing bolt 122 may be inserted and coupled in a screwing method.

At this time, the screw thread formed in the adjusting part 121a is composed of a screw thread in the opposite direction to the screw thread formed in the through hole 122a, and at the same time, the screw thread formed in the fixing bolt 122 and the fixing pin 124 are threads in different directions. It is formed as a structure in which the fixing bolt 122 and the fixing pin 124 can move in opposite directions as the user rotates the fixing bolt 122 in one direction.

Again, both the fixing bolt 122 and the fixing pin 124 are exposed to the lower part of the cylinder 121, and in particular, the lower end of the fixing pin 124 is of the support bracket 123 spaced apart from the lower part of the cylinder 121. It is inserted and fixed on the fixture 123a to physically fix the cylinder 121 and the support bracket 123 to each other.

The y-axis guide block 123b coupled to the lower portion of the support bracket 123 is connected to the y-axis rail 21 and can slide along the y-axis rail 21.

Accordingly, as shown in FIG. 9 , when the user rotates the top head of the fixing bolt 122 in the normal and reverse direction, the fixing is coupled to the adjuster 121a of the cylinder 121 by screwing according to the amount of rotation. The y-axis frame 110 integrated with the cylinder 121 can be pulled up and down by the bolt 122. At the same time, the fixing bolt 122 can also be pulled up and down riding the fixing pin 124 fixedly coupled to the fixture 123a of the support bracket 123. As a result, while one side of the y-axis frame 110 of the y-axis guider module 120 controlled by the user is towed upward or downward, the level of the y-axis moving unit 100 itself can be adjusted. The horizontality of the z-axis moving unit 200 and the probe 240 supported by the z-axis moving unit 200 may be adjusted.

The y-axis guider module 120 configured as described above is provided in plurality to correspond to the fact that the y-axis rails 21 are provided as a pair formed on the left and right sides of the x-axis moving unit 20, respectively, and the y-axis frame It may be formed on the left and right sides of (110), respectively.

For example, the plurality of y-axis guider modules 120 include a first y-axis guider module 120a connected to the left y-axis rail 21a and a second y-axis guider module connected to the right y-axis rail 21b ( 120b) and a third y-axis guider module 120c connected to at least one of the left y-axis rail 21a and the right y-axis rail 21b. In the embodiment shown in FIG. 5, the y-axis A first y-axis guider module 120a formed on the left side of the frame 110 and connected to the left y-axis rail 21a, formed on the right front side of the y-axis frame 110 and connected to the right y-axis rail 21b It can be exemplified by the second y-axis guider module 120b and the third y-axis guider module 120c formed on the right rear side of the y-axis frame 110 and connected to the right y-axis rail 21b.

That is, the user can properly adjust the horizontality of the y-axis moving unit 100 by properly adjusting the first, second, and third y-axis guider modules 120a, 120b, and 120c as described above, and for example, the left side of the 3D measuring device If the left and right levels are distorted so that the height is increased, the user adjusts the second y-axis guider module 120b and the third y-axis guider module 120c to pull the right side of the y-axis moving unit 100 upward to correct the distorted level. can do. When it is necessary to move the right front side of the y-axis moving unit 100 higher according to the twisted posture of the three-dimensional measuring device, the second y-axis guider module 120b than the third y-axis guider module 120c By further separating the cylinder 121 and the support bracket 123 of the y-axis moving unit 100, the right front side can be moved relatively high to adjust the level.

In summary, the user can adjust the horizontality by adjusting the inclination of the y-axis moving unit 100 by rotating only each fixing bolt 122 while checking the horizontal state of the y-axis moving unit 100 with the naked eye. There is a significant improvement in convenience.

Meanwhile, the y-axis moving unit 100 further includes an encoder unit 130 installed between the y-axis frame 110 and the y-axis rail 21 to detect a movement amount of the y-axis moving unit 100 .

At this time, a scale 22 may be formed parallel to the y-axis rail 21 on the side of the x-axis moving unit 20, and the encoder unit 130 reciprocates on the scale 22 while the scale 22 ) is read to detect the real-time position of the y-axis moving unit 100, and based on this, the amount of movement of the y-axis moving unit 100 can be detected.

In a typical three-dimensional measuring machine, the scale 22 and the encoder unit 130 are called linear encoders, and in the process of linear movement of the y-axis moving unit 100, the y-axis rail 21 and the y-axis guide block 123b When dust or lubricants for lubricating various parts are interposed between them, the straightness of the y-axis moving unit 100 deteriorates and a gap occurs between the scale 22 and the encoder unit 130 or, conversely, a point of line contact occurs Therefore, real-time location detection of the y-axis moving unit 100 cannot be accurately performed.

Thus, the encoder unit 130 in this embodiment allows the user to finely adjust the distance between the encoder unit 130 and the scale 22, so that the sensitivity of the contact between the encoder unit 130 and the scale 22 can be further improved. . Based on the above development concept, the encoder unit 130 will be described in detail below.

As shown in FIG. 6, the encoder unit 130 is connected to the scale 22 provided in parallel with the y-axis rail 21, and reads the reference of the scale 22. The read header 131 and the y-axis frame 110 ) It may be exemplified as including a header support member 132 supporting the read header 131 on the top.

The lead header 131 may be detachably provided on the header support member 132, and is coupled so as to be positioned toward the scale 22 on the header support member 132 by a user's manipulation of the header support member 132. It can be. A coupler 131a for coupling with the header support member 132 may be formed in the lead header 131 .

When the y-axis moving unit 100 moves in the y-axis direction, the real-time movement coordinates of the y-axis moving unit 100 are measured by the reader head 131, and the measured coordinate values are It is used as data for location determination. Since the read header 131 can be referenced from known matters in a line capable of measuring movement coordinates by reading the scale 22, a detailed description thereof will be omitted.

Next, the header support member 132 mutually penetrates the encoder bracket 132a extending from the y-axis frame 110 toward the outside of the scale 22, the encoder bracket 132a and the lead header 131, It includes a fastening bolt 132b and a movable bolt 132c disposed eccentrically with the fastening bolt 132b and in contact with the surface of the lead header 131 while penetrating the encoder bracket 132a. can be exemplified.

Encoder bracket 132a has a fastener 132d through which the fastening bolt 132b passes, and a plurality of movable members 132e through which the movable bolt 132c passes at an eccentric position around the fastener 132d. may be arranged radially.

The fastening bolt 132b passes through the fastener 132d and the coupler 131a at the same time to couple the lead header 131 to the header support member 132, and the movable bolt 132c has a plurality of movable members ( 132e) are provided in a plurality so as to be coupled to corresponding locations, and the ends do not pass through the lead header 131 while penetrating the movable member 132e, and are simply supported in contact to press the lead header 131 in one direction.

Therefore, in the process of linear movement of the y-axis moving unit 100, a line contact occurs between the y-axis rail 21 and the y-axis guide block 123b, or a foreign substance is interposed therebetween, thereby causing the y-axis moving unit 100 to If the accurate position detection of the y-axis moving part 100 is not achieved because the lead header 131 is separated from the scale 22 due to the decrease in straightness, the user may use a plurality of movable bolts whose ends are in contact with the lead header 131 ( 132c), the leadheader 131 is pressed with the movable bolt 132c so that the leadheader 131 is pressed in the direction of the scale 22 by rotating at least one of them.

In this way, if the fastening depth of each of the plurality of movable bolts 132c is adjusted differently, the inclination of the lead header 131 can be adjusted three-dimensionally. It becomes a structure that can be precisely positioned, and as a result, the contact sensitivity between the encoder unit 130 and the scale 22 is further improved, so that the movement amount of the y-axis moving unit 100 can be detected more accurately. have

Next, the z-axis moving unit 200 is connected to the z-axis rail 111 formed in front of the y-axis frame 110 while supporting the probe 240 forward, and is installed to be reciprocating in the z-axis direction . That is, movement of the probe 240 in the z-axis direction may be performed by the z-axis moving unit 200 .

More specifically, the z-axis moving unit 200 is installed on the path of the z-axis rail 111 as shown in FIGS. 13 to 15 and rotates the screw shaft 211 extending in the z-axis direction. The motor 210, the z-axis guide block 221 connected to the z-axis rail 111 in the rear, and the holder 220 and the screw shaft 211 and the holder supporting the probe 240 in the front 220, it may be illustrated as including a fracture inducing member 230, which is installed between the holder 220 and induces fracture when interference occurs during movement of the holder 220 in the z-axis direction.

When the z-axis motor 210 rotates the screw shaft 211, the holder 220 can be reciprocated in the z-axis direction while the z-axis guide block 221 is guided by the z-axis rail 111, so, The probe 240 supported by the holder 220 may be moved in the z-axis direction.

Considering the shape of the object to be measured with a certain height, the movement range of the probe 240 in the z-axis direction should be secured relatively longer than the movement range in the above-described x-axis and y-axis directions, and the z-axis rail 111 and It is common that the screw shaft 211 is longer than the above-described x-axis rail 11 and y-axis rail 21 .

Accordingly, the z-axis rail 111 and the screw shaft 211 must be precisely manufactured to ensure the straightness of the z-axis moving unit 200 while being relatively long, but the longer the length, the higher the manufacturing difficulty and the lower the precision. There was a problem. Because of this, the straightness of the z-axis moving unit 200 was not sufficiently guaranteed, and in the process of reciprocating the holder 220 in the z-axis direction, unnecessary lines were attached to the z-axis rail 111 and the screw shaft 211. A problem occurs in which the z-axis rail 111 or the screw shaft 211 is deformed or damaged due to contact or interference.

In addition, even when the probe 240 hits the object to be measured strongly in the z-axis direction, the z-axis rail 111 and the screw shaft 211 are easily deformed.

Therefore, periodic replacement of the z-axis rail 111 or the screw shaft 211 is inevitable, which is not efficient when considering the profitability of maintenance.

Correspondingly, when unnecessary interference occurs in the process of moving the holder 220 in the z-axis direction in this embodiment, by inducing arbitrary fracture of the fracture inducing member 230 at the connection point between the holder 220 and the screw shaft 211. It has a structure to prevent deformation or damage of the z-axis rail 111 and the screw shaft 211 in advance.

To this end, the fracture inducing member 230 includes a screw block 231 connected to the screw shaft 211, a first plate 232 coupled forward from the screw block 231, and a first plate 232. The second plate 233 spaced a certain distance upward to form an induction space between the first plate 232 and connected to the holder 220, and the first plate 232 and the first plate 232 to cross the induction space. It may be exemplified as including a fracture bolt 234 fastened by penetrating the second plate 233 .

The screw block 231 is connected to the screw shaft 211, and when the screw shaft 211 rotates, it reciprocates along the screw shaft 211 in the z-axis direction. Thus, the first and second plates 232 and 233 connected to the screw block 231, the holder 220, etc. are moved in the z-axis direction.

The first plate 232 and the second plate 233 are disposed parallel to each other at a predetermined distance apart in the z-axis direction, and a fracture hole (not shown) into which the fracture bolt 234 is inserted and fixed may be formed, respectively. . Accordingly, when the fracture bolt 234 is deformed, a structure capable of easily replacing only the fracture bolt 234 is provided.

The first plate 232 may pass through the through window 222 formed at the center of the holder 220 while connected to the screw block 231 and extend forward of the holder 220 .

At the same time, the second plate 233 also passes through the through window 222 and can be formed to extend forward of the holder 220, and the fracture bolt 234 also passes through the through window 222 and is located in front of the holder 220. The first plate 232 and the second plate 233 may be mutually penetrated and fastened.

The fracture bolt 234 is fastened through one edge portion and the other edge portion of the first plate 232 and the second plate 233, respectively, to evenly distribute and support the external force applied to the fracture inducing member 230.

The first plate 232 is coupled to the screw block 231, the second plate 233 is coupled to the holder 220, and the first plate 232 and the second plate 233 are connected by a fracture bolt 234. Since they are connected to each other, the fracture inducing member 230 configured as described above organically connects the screw shaft 211 and the holder 220.

Accordingly, when an external force due to interference is applied to the z-axis rail 111 and the screw shaft 211 while the z-axis moving unit 200 moves in the z-axis direction, this external force is directly applied to the z-axis rail 111 and It is not applied to the screw shaft 211 and is buffered in the fracture inducing member 230 portion.

In this process, as shown in FIG. 16, the first plate 232 and the second plate 233 act in opposite directions to apply a compressive load to the fracture bolt 234, and this external force causes the fracture bolt ( 234), when the allowable load is exceeded, the fracture bolt 234 is deformed or severely fractured. Therefore, since the operator only needs to stop the operation of the measuring instrument and replace only the lost fractured bolt 234 with a new one, it is possible to perform maintenance more conveniently and reduce maintenance costs.

The embodiments of the present invention described above are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, it will be well understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and alternatives within the spirit and scope of the present invention as defined by the appended claims.

10: base
20: x-axis moving part
100: y-axis moving part
200: z-axis moving unit

Claims (5)

a base on which an x-axis rail is formed;
an x-axis moving unit connected to the x-axis rail, installed to be reciprocally movable in the x-axis direction, and having a y-axis rail formed thereon;
a y-axis moving unit connected to the y-axis rail and installed to be reciprocally movable in the y-axis direction and having a z-axis rail formed forward; and
A z-axis moving unit connected to the z-axis rail and installed to be reciprocally movable in the z-axis direction and supporting a probe;
The y-axis movement unit,
a y-axis frame supporting the z-axis rail forward; and
A high-precision three-dimensional measuring device comprising a; y-axis guider module installed between the y-axis frame and the y-axis rail and connected to the y-axis rail to adjust the level of the y-axis frame. The method of claim 1,
The y-axis rails are provided in pairs formed on the left and right sides of the x-axis moving unit,
The y-axis guider module is a high-precision three-dimensional measuring device, characterized in that provided in plurality to be connected to each of the pair of y-axis rails. The method of claim 2,
The plurality of y-axis guider modules,
A first y-axis guider module connected to the left y-axis rail;
A second y-axis guider module connected to the right y-axis rail; and
A third y-axis guider module connected to at least one of the left y-axis rail and the right y-axis rail; High-precision three-dimensional measuring device comprising a. The method of claim 3,
Each of the plurality of y-axis guider modules,
a cylinder integrally formed on a side surface of the y-axis frame and through which an adjustment member having a screw thread in an upward and downward direction is formed;
a fixing bolt coupled to the control unit in a screwing manner and having a through-hole threaded in a vertical direction at the center;
a support bracket for supporting a y-axis guide block disposed at a lower portion of the cylinder at a predetermined distance, having a screw-threaded fixture formed on the upper surface, and connected to the y-axis rail at a lower portion; and
A high-precision three-dimensional measuring device comprising a; fixing pin inserted into the through-hole in a screwing manner and having a lower end exposed below the fixing bolt and fixed to the fixture in a screwing manner. The method of claim 4,
The y-axis movement unit,
An encoder unit installed between the y-axis frame and the y-axis rail to detect the movement amount of the y-axis moving unit; further comprising,
The encoder part,
a read header connected to a scale prepared in parallel with the y-axis rail to read a reference of the scale; and
A header support member supporting a lead header on the y-axis frame; includes,
The header support member,
an encoder bracket extending from the y-axis frame toward the outside of the scale;
fastening bolts fastened by mutually penetrating the encoder bracket and the lead header; and
A movable bolt disposed eccentrically with the fastening bolt and in contact with the surface of the lead header while penetrating the encoder bracket;
The z-axis moving unit,
a z-axis motor installed on the path of the z-axis rail and rotating a screw shaft extending in the z-axis direction;
a holder for supporting the z-axis guide block connected to the z-axis rail to the rear and the probe to the front; and
A high-precision three-dimensional measuring device comprising a; fracture inducing member installed between the screw shaft and the holder and inducing fracture when interference occurs when the holder moves in the z-axis direction.

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