Three-coordinate measuring instrument

Abstract

The invention provides a three-coordinate measuring instrument, and belongs to the technical field of measuring instruments. Comprising a detector body, a bottom plate is arranged at the bottom of the detector body, a side edge clamping mechanism and a side edge detection mechanism are arranged on the upper surface of the bottom plate, the side edge clamping mechanism comprises a placement pad, the placement pad is located on the upper surface of the bottom plate, and an adjusting assembly is arranged on the upper surface of the placement pad. A clamping assembly is arranged on the side face of the adjusting assembly. The clamping sleeve can be flexibly replaced, the position of the clamping sleeve clamping the turbine disc can be changed, the flexibility of the device is improved, the turbine disc fixed by the clamping sleeve can be turned over, the bottom of the turbine disc faces upwards, detection of the bottom of the turbine disc is completed, and the situation that a traditional detector cannot detect the bottom of the turbine disc is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring instruments, and particularly relates to a three-coordinate measuring instrument. Background Art

[0002] A three-coordinate measuring instrument refers to an instrument that measures by taking three-dimensional points, and can also be called a three-coordinate measuring machine or a three-dimensional measuring instrument. The measuring principle of the three-coordinate measuring instrument is as follows: Through the cooperation of the detection head (detection sensor) and the movement of the measuring space axis, the discrete spatial point positions of the measured geometric elements are obtained, and then through certain mathematical calculations, the analysis and fitting of the measured points (point group) are completed, and finally the measured geometric elements are restored, and on this basis, the deviation between it and the theoretical value (nominal value) is calculated, so as to complete the inspection work of the measured part.

[0003] However, for some existing three-coordinate measuring instruments, the clamping position of the turbine disk cannot be adjusted during use, and the bottom of the turbine disk contacts the table surface of the measuring instrument, resulting in the inconvenience of the measuring instrument to detect the bottom of the turbine disk, and there are limitations in use. Therefore, the present application provides a three-coordinate measuring instrument to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a three-coordinate measuring instrument to solve the problems that for some existing three-coordinate measuring instruments, the clamping position of the turbine disk cannot be adjusted during use, and the bottom of the turbine disk contacts the table surface of the measuring instrument, resulting in the inconvenience of the measuring instrument to detect the bottom of the turbine disk and there are limitations in use.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A three-coordinate measuring instrument, comprising: a detector main body, a bottom plate is arranged at the bottom of the detector main body, a side clamping mechanism and a side detection mechanism are arranged on the upper surface of the bottom plate, the side clamping mechanism includes a placement pad, the placement pad is located on the upper surface of the bottom plate, a first moving groove is opened on the upper surface of the placement pad, an adjusting component is arranged on the upper surface of the placement pad, a clamping component is arranged on the side surface of the adjusting component, a side plate is arranged on the upper surface of the bottom plate, and an electric push rod is arranged between the side plate and the side detection mechanism.

[0006] In some examples, the adjusting component includes a mounting plate, the mounting plate is arranged in a concave shape, a threaded rod is rotatably arranged between the two sides of the mounting plate, a motor plate is arranged on one side of the mounting plate, a side block is arranged on the other side of the mounting plate, a rotating rod is arranged between the mounting plate and the side block, the rotating rod is fixedly connected with the threaded rod, the rotating rod is rotatably connected with the side block, the side block is fixedly connected with the bottom plate, a driving motor is arranged on the upper surface of the motor plate, and the output shaft of the driving motor is fixedly connected with the threaded rod.

[0007] In some examples, two slide rails are arranged on the upper surface of the mounting plate. Chutes are formed on one side of each of the two slide rails facing each other. A plurality of sliders are arranged inside each chute. A fixing block is threadedly sleeved on the surface of the threaded rod. A connecting block is arranged at the bottom of the fixing block. The fixing block is fixedly connected to the slider through the connecting block. The slider is slidably connected to the chute.

[0008] In some examples, a connecting plate is arranged at the bottom of the side of the fixing block away from the slider. A support plate is arranged on the side of the connecting plate away from the fixing block. An arc-shaped receiving groove is formed on the upper surface of the support plate. A ball is arranged at the bottom of the support plate. The ball is rotatably connected to the bottom of the support plate. The bottom of the ball is located in the first moving groove, and the ball is rotatably connected to the first moving groove. An installation groove is arranged on the side of the fixing block away from the slider. A rotating motor is arranged in the installation groove.

[0009] In some examples, the clamping assembly includes a mounting block. A rotating block is arranged at the bottom of the mounting block. The bottom of the rotating block is arc-shaped and is located in the receiving groove. The side surface of the mounting block is fixedly connected to the top of the output shaft of the rotating motor. Placement grooves are formed at the top and bottom of the mounting block. Second positioning holes are formed on the inner surfaces of the two placement grooves.

[0010] In some examples, the clamping assembly further includes a clamping sleeve. A clamping groove is formed inside the clamping sleeve. Placement plates are arranged at the top and bottom of the side of the clamping sleeve close to the fixing block. First positioning holes are formed on the surfaces of the two placement plates. The positions of the first positioning holes and the second positioning holes correspond to each other. Bolts are arranged inside the first positioning holes. The bolts are threadedly connected to the first positioning holes and the second positioning holes. A tightening bolt is arranged at the top of the clamping sleeve. The tightening bolt passes through the clamping sleeve and extends into the clamping groove. The tightening bolt is threadedly connected to the clamping sleeve.

[0011] In some examples, the side detection mechanism includes a side plate. The bottom of the side plate is slidably connected to the bottom plate. A linear motor is arranged on the side of the side plate close to the side clamping mechanism. A moving block is sleeved on the guide rail of the linear motor. A second moving groove is formed on the surface of the moving block. The guide rail of the linear motor passes through the second moving groove and is slidably connected to the moving block. First through holes and a second through hole are arranged inside the side of the moving block away from the second moving groove. There are two first through holes. The second through hole is located between the two first through holes. A first extension plate is arranged inside the first through hole. A second extension plate is arranged inside the second through hole. The first extension plate is slidably connected to the first through hole. The second extension plate is slidably connected to the second through hole.

[0012] In some examples, a limiting block is provided at one end of the first extension plate, a first sliding block is provided at the end of the first extension plate away from the limiting block, a second through groove is formed in the middle of the first sliding block, a limiting block is provided at one end of the second extension plate, and a second sliding block is provided at the end of the second extension plate away from the limiting block. First through grooves are formed at both the top and bottom of the second sliding block.

[0013] In some examples, a double-headed push rod is provided between the first sliding block and the second sliding block. The size of the first through groove matches the size of the first extension plate, and the size of the second through groove matches the size of the second extension plate. Mounting sleeves are provided on the sides of the first sliding block and the second sliding block away from each other, and probes are provided inside both of the two mounting sleeves.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: 1. Select a suitable clamping sleeve according to the shape of the turbine disk. Match and connect the placement plate on the side of the clamping sleeve with the placement groove of the mounting block, so that the positions of the first positioning hole and the second positioning hole correspond to each other, and fix them with bolts. After fixing, place the turbine disk in the clamping groove and rotate the tightening bolt to fix the turbine disk, enabling the device to flexibly replace the clamping sleeve; 2. By starting the driving motor, the driving motor drives the threaded rod to rotate. The rotation of the threaded rod drives the rotating rod to rotate, causing the rotating rod to rotate inside the side block. The fixing block is threadedly connected to the threaded rod, and the bottom of the fixing block is fixedly connected to the slider through the connecting block. The slider is slidably connected to the chute. When the threaded rod rotates, the slider at the bottom of the fixing block is restricted by the chute. At this time, the fixing block will move linearly on the surface of the threaded rod, thereby adjusting the position of the fixing block. Since the bottom of the fixing block is connected to the support plate through the connecting plate, a rotating block is provided in the receiving groove inside the support plate, and the mounting block is connected to the rotating motor inside the fixing block, so when the fixing block moves, it will drive the mounting block to move, and then drive the clamping sleeve to move, thereby changing the position where the clamping sleeve of the device clamps the turbine disk and improving the flexibility of the device; 3. By setting the rotating motor to drive the fixing block to rotate, at this time, the arc-shaped rotating block at the bottom of the fixing block disengages from the receiving groove, enabling the fixing block to rotate smoothly. At this time, the position of the clamping sleeve will change with the change of the angle of the mounting block, causing the turbine disk fixed by the clamping sleeve to complete a flip, making the bottom of the turbine disk face upward, thereby completing the detection of the bottom of the turbine disk and avoiding the situation where the traditional detector cannot detect the bottom of the turbine disk; 4. The moving block is driven by a linear motor to slide on the guide rail surface of the linear motor, thereby changing the height of the probe. At the same time, the first sliding block and the second sliding block are pushed to move by the arranged double-headed push rod, so that the first sliding block and the second sliding block move away from each other, and the first extension plate and the second extension plate slide in the first through hole and the second through hole inside the moving block, enabling the first sliding block and the second sliding block to move smoothly. At this time, the detection length of the probe will be extended, enabling the detection of the side surface of the turbine disk without moving the detection turbine disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present disclosure and, together with the specification, are further used to explain the principles of the present disclosure and enable those skilled in the relevant art to implement and use the present disclosure.

[0016] Figure 1 It is a schematic three-dimensional structure diagram of a three-coordinate measuring instrument; Figure 2 It is a schematic structural diagram of a side detection mechanism in a three-coordinate measuring instrument Figure 1 ; Figure 3 It is a schematic structural diagram of a side detection mechanism in a three-coordinate measuring instrument Figure 2 ; Figure 4 It is an exploded view of the structure of a side detection mechanism in a three-coordinate measuring instrument; Figure 5 It is a schematic structural diagram of a side clamping mechanism in a three-coordinate measuring instrument; Figure 6 It is an exploded schematic diagram of the structure of a clamping mechanism in a three-coordinate measuring instrument; Figure 7 It is a schematic structural diagram of an adjusting component in a three-coordinate measuring instrument.

[0017] [Reference Signs] 1. Main body of the detector; 2. Bottom plate; 3. Side clamping mechanism; 31. Placing pad; 32. Adjusting component; 3201. Mounting plate; 3202. Side block; 3203. Rotating rod; 3204. Threaded rod; 3205. Fixed block; 3206. Driving motor; 3207. Motor plate; 3208. Slide rail; 3209. Mounting groove; 3210. Rotating motor; 3211. Connecting plate; 3212. Support plate; 3213. Receiving groove; 3214. Chute; 3215. Connecting block; 3216. Slide block; 33. Clamping component; 3301. Mounting block; 3302. Placing groove; 3303. Rotating block; 3304. Clamping sleeve; 3305. Placing plate; 3306. First positioning hole; 3307. Clamping groove; 3308. Tightening bolt; 3309. Second positioning hole; 34. First moving groove; 4. Side detection mechanism; 401. Side plate; 402. Linear motor; 403. Moving block; 404. Second moving groove; 405. First sliding block; 406. Second sliding block; 407. First extension plate; 408. Second extension plate; 409. Mounting sleeve; 410. Probe; 411. Double-headed push rod; 412. First through slot; 413. Second through slot; 414. First through hole; 415. Second through hole; 5. Electric push rod. Detailed implementation mode

[0018] The following describes in detail a three - coordinate measuring instrument provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For those skilled in the art in some well - known technical fields, other alternative methods can also be adopted for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0019] As Figures 1 to 7 shown, an embodiment of the present invention provides a three - coordinate measuring instrument, including: a main body 1 of the detector, a bottom plate 2 is arranged at the bottom of the main body 1 of the detector, a side clamping mechanism 3 and a side detection mechanism 4 are arranged on the upper surface of the bottom plate 2. The side clamping mechanism 3 includes a placing pad 31, the placing pad 31 is located on the upper surface of the bottom plate 2, a first moving groove 34 is opened on the upper surface of the placing pad 31, an adjusting component 32 is arranged on the upper surface of the placing pad 31, a clamping component 33 is arranged on the side of the adjusting component 32. A side plate is arranged on the upper surface of the bottom plate 2, and an electric push rod 5 is arranged between the side plate and the side detection mechanism 4.

[0020] As Figure 5 、 Figure 6 and Figure 7As shown in the figure, it should be further noted in this embodiment that the adjusting component 32 includes a mounting plate 3201 which is concave in shape. A threaded rod 3204 is rotatably arranged between the two sides of the mounting plate 3201. A motor plate 3207 is arranged on one side of the mounting plate 3201, and a side block 3202 is arranged on the other side of the mounting plate 3201. A rotating rod 3203 is arranged between the mounting plate 3201 and the side block 3202. The rotating rod 3203 is fixedly connected to the threaded rod 3204 and rotatably connected to the side block 3202. The side block 3202 is fixedly connected to the bottom plate 2. A driving motor 3206 is arranged on the upper surface of the motor plate 3207. The output shaft of the driving motor 3206 is fixedly connected to the threaded rod 3204. Two sliding rails 3208 are arranged on the upper surface of the mounting plate 3201. Chute 3214 is provided on the opposite side of the two sliding rails 3208. A number of sliders 3216 are arranged inside each chute 3214. A fixing block 3205 is threadedly sleeved on the surface of the threaded rod 3204. A connecting block 3215 is arranged at the bottom of the fixing block 3205. The fixing block 3205 is fixedly connected to the slider 3216 through the connecting block 3215. The slider 3216 is slidably connected to the chute 3214. A connecting plate 3211 is arranged at the bottom of the side of the fixing block 3205 away from the slider 3216. A support plate 3212 is arranged on the side of the connecting plate 3211 away from the fixing block 3205. An arc-shaped receiving groove 3213 is provided on the upper surface of the support plate 3212. A ball is arranged at the bottom of the support plate 3212. The ball is rotatably connected to the bottom of the support plate 3212. The bottom of the ball is located in the first moving groove 34 and is rotatably connected to the first moving groove 34. An installation groove 3209 is arranged on the side of the fixing block 3205 away from the slider 3216. A rotating motor 3210 is arranged in the installation groove 3209. By starting the driving motor 3206, the driving motor 3206 drives the threaded rod 3204 to rotate. The rotation of the threaded rod 3204 drives the rotating rod 3203 to rotate, so that the rotating rod 3203 rotates inside the side block 3202. The fixing block 3205 is threadedly connected to the threaded rod 3204, and the bottom of the fixing block 3205 is fixedly connected to the slider 3216 through the connecting block 3215. The slider 3216 is slidably connected to the chute 3214. When the threaded rod 3204 rotates in a threaded manner, the slider 3216 at the bottom of the fixing block 3205 is restricted by the chute 3214. At this time, the fixing block 3205 will move linearly on the surface of the threaded rod 3204, thereby adjusting the position of the fixing block 3205. Since the bottom of the fixing block 3205 is connected to the support plate 3212 through the connecting plate 3211, a rotating block 3303 is arranged in the receiving groove 3213 inside the support plate 3212, and the mounting block 3301 is connected to the rotating motor 3210 inside the fixing block 3205. Therefore, when the fixing block 3205 moves, it will drive the mounting block 3301 to move, and then drive the clamping sleeve 3304 to move. The two clamping sleeves 3304 move in the same direction.Thereby changing the position where the clamping sleeve 3304 of the device clamps the turbine disk and improving the flexibility of the device.

[0021] As Figure 5 , Figure 6 shown, it should be further noted in this embodiment that the clamping assembly 33 includes a mounting block 3301. A rotating block 3303 is provided at the bottom of the mounting block 3301. The bottom of the rotating block 3303 is arc-shaped and is located in the receiving groove 3213. The side surface of the mounting block 3301 is fixedly connected to the top of the output shaft of the rotating motor 3210. Placing grooves 3302 are provided at the top and bottom of the mounting block 3301. Second positioning holes 3309 are provided on the inner surfaces of the two placing grooves 3302. The clamping assembly 33 further includes a clamping sleeve 3304. A clamping groove 3307 is provided inside the clamping sleeve 3304. Placing plates 3305 are provided at the top and bottom of the side of the clamping sleeve 3304 close to the fixed block 3205. First positioning holes 3306 are provided on the surfaces of the two placing plates 3305. The positions of the first positioning holes 3306 and the second positioning holes 3309 correspond to each other, and bolts are provided inside the first positioning holes 3306. The bolts are threadedly connected to the first positioning holes 3306 and the second positioning holes 3309. A tightening bolt 3308 is provided at the top of the clamping sleeve 3304. The tightening bolt 3308 passes through the clamping sleeve 3304 and extends into the clamping groove 3307. The tightening bolt 3308 is threadedly connected to the clamping sleeve 3304. Select a suitable clamping sleeve 3304 according to the shape of the turbine disk. Match and connect the placing plate 3305 on the side of the clamping sleeve 3304 with the placing groove 3302 of the mounting block 3301, so that the positions of the first positioning holes 3306 and the second positioning holes 3309 correspond to each other, and fix them with bolts. After fixing, place the turbine disk in the clamping groove 3307 and rotate the tightening bolt 3308 to fix the turbine disk, enabling the device to flexibly replace the clamping sleeve 3304. Drive the fixed block 3205 to rotate through the provided rotating motor 3210. At this time, the arc-shaped rotating block 3303 at the bottom of the fixed block 3205 disengages from the receiving groove 3213, enabling the fixed block 3205 to rotate smoothly. At this time, the position of the clamping sleeve 3304 will change with the change of the angle of the mounting block 3301, causing the turbine disk fixed by the clamping sleeve 3304 to complete a flip, making the bottom of the turbine disk face upward, thereby completing the detection of the bottom of the turbine disk and avoiding the situation where the traditional detector cannot detect the bottom of the turbine disk.

[0022] As Figure 2 , Figure 3 and Figure 4As shown, it should be further noted in this embodiment that the side detection mechanism 4 includes a side plate 401. The bottom of the side plate 401 is slidably connected to the bottom plate 2. On one side of the side plate 401 close to the side clamping mechanism 3, a linear motor 402 is provided. A moving block 403 is sleeved on the guide rail surface of the linear motor 402. A second moving groove 404 is formed on the surface of the moving block 403. The guide rail of the linear motor 402 passes through the second moving groove 404 and is slidably connected to the moving block 403. Inside one side of the moving block 403 away from the second moving groove 404, a first through hole 414 and a second through hole 415 are provided. There are two first through holes 414, and the second through hole 415 is located between the two first through holes 414. A first extension plate 407 is provided inside the first through hole 414, and a second extension plate 408 is provided inside the second through hole 415. The first extension plate 407 is slidably connected to the first through hole 414, and the second extension plate 408 is slidably connected to the second through hole 415. A limiting block is provided at one end of the first extension plate 407. A first sliding block 405 is provided at the end of the first extension plate 407 away from the limiting block. A second through slot 413 is formed in the middle of the first sliding block 405. A limiting block is provided at one end of the second extension plate 408. A second sliding block 406 is provided at the end of the second extension plate 408 away from the limiting block. First through slots 412 are formed at the top and bottom of the second sliding block 406. A double-headed push rod 411 is provided between the first sliding block 405 and the second sliding block 406. The size of the first through slot 412 matches the size of the first extension plate 407, and the size of the second through slot 413 matches the size of the second extension plate 408. Mounting sleeves 409 are provided on the sides of the first sliding block 405 and the second sliding block 406 away from each other. Probes 410 are provided inside both mounting sleeves 409. By driving the moving block 403 to slide on the guide rail surface of the linear motor 402 through the linear motor 402, the height of the probe 410 is changed. At the same time, the double-headed push rod 411 is used to push the first sliding block 405 and the second sliding block 406 to move, so that the first sliding block 405 and the second sliding block 406 move away from each other, and the first extension plate 407 and the second extension plate 408 slide in the first through hole 414 and the second through hole 415 inside the moving block 403, enabling the first sliding block 405 and the second sliding block 406 to move smoothly. At this time, the detection length of the probe 410 will be extended. At the same time, the side detection mechanism 4 can be pushed to move by the electric push rod 5, so that the side detection mechanism 4 can better detect the turbine disk, and the detection of the turbine disk can be completed without moving the turbine disk to detect the side of the turbine disk.

[0023] The present invention covers any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. Additionally, well-known methods, processes, procedures, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0024] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A three - coordinate measuring instrument, characterized in that, Including: A detector main body (1), a bottom plate (2) is arranged at the bottom of the detector main body (1), a side clamping mechanism (3) and a side detection mechanism (4) are arranged on the upper surface of the bottom plate (2), the side clamping mechanism (3) includes a placement pad (31), the placement pad (31) is located on the upper surface of the bottom plate (2), a first moving groove (34) is opened on the upper surface of the placement pad (31), an adjusting component (32) is arranged on the upper surface of the placement pad (31), a clamping component (33) is arranged on the side surface of the adjusting component (32), a side plate is arranged on the upper surface of the bottom plate (2), and an electric push rod (5) is arranged between the side plate and the side detection mechanism (4).

2. The coordinate measuring machine according to claim 1, wherein, The adjusting component (32) includes a mounting plate (3201), the mounting plate (3201) is arranged in a concave shape, a threaded rod (3204) is rotatably arranged between the two sides of the mounting plate (3201), a motor plate (3207) is arranged on one side of the mounting plate (3201), a side block (3202) is arranged on the other side of the mounting plate (3201), a rotating rod (3203) is arranged between the mounting plate (3201) and the side block (3202), the rotating rod (3203) is fixedly connected with the threaded rod (3204), the rotating rod (3203) is rotatably connected with the side block (3202), the side block (3202) is fixedly connected with the bottom plate (2), a driving motor (3206) is arranged on the upper surface of the motor plate (3207), and an output shaft of the driving motor (3206) is fixedly connected with the threaded rod (3204).

3. A three - coordinate measuring instrument according to claim 2, characterized in that, Two slide rails (3208) are arranged on the upper surface of the mounting plate (3201), sliding grooves (3214) are opened on the opposite sides of the two slide rails (3208), a plurality of sliders (3216) are arranged inside each sliding groove (3214), a fixing block (3205) is threadedly sleeved on the surface of the threaded rod (3204), a connecting block (3215) is arranged at the bottom of the fixing block (3205), the fixing block (3205) is fixedly connected with the slider (3216) through the connecting block (3215), and the slider (3216) is slidably connected with the sliding groove (3214).

4. A three-coordinate measuring instrument according to claim 3, characterized in that A connecting plate (3211) is arranged at the bottom of the side of the fixing block (3205) away from the slider (3216), a supporting plate (3212) is arranged on the side of the connecting plate (3211) away from the fixing block (3205), an arc-shaped receiving groove (3213) is opened on the upper surface of the supporting plate (3212), a ball is arranged at the bottom of the supporting plate (3212), the ball is rotatably connected with the bottom of the supporting plate (3212), the bottom of the ball is located in the first moving groove (34), and the ball is rotatably connected with the first moving groove (34), an installation groove (3209) is arranged on the side of the fixing block (3205) away from the slider (3216), and a rotating motor (3210) is arranged in the installation groove (3209).

5. A three-coordinate measuring instrument according to claim 1, characterized in that, The clamping assembly (33) includes a mounting block (3301). A rotating block (3303) is provided at the bottom of the mounting block (3301). The bottom of the rotating block (3303) is arc-shaped, and the bottom of the rotating block (3303) is located in the receiving groove (3213). The side surface of the mounting block (3301) is fixedly connected to the top of the output shaft of the rotating motor (3210). Placement grooves (3302) are formed at both the top and bottom of the mounting block (3301). Second positioning holes (3309) are formed on the inner surfaces of the two placement grooves (3302).

6. A three-coordinate measuring instrument according to claim 5, characterized in that, The clamping assembly (33) further includes a clamping sleeve (3304). A clamping groove (3307) is formed inside the clamping sleeve (3304). Placement plates (3305) are provided at both the top and bottom of the side of the clamping sleeve (3304) close to the fixed block (3205). First positioning holes (3306) are formed on the surfaces of the two placement plates (3305). The positions of the first positioning holes (3306) and the second positioning holes (3309) correspond to each other. Bolts are provided inside the first positioning holes (3306). The bolts are threadedly connected to the first positioning holes (3306) and the second positioning holes (3309). A tightening bolt (3308) is provided at the top of the clamping sleeve (3304). The tightening bolt (3308) passes through the clamping sleeve (3304) and extends into the clamping groove (3307). The tightening bolt (3308) is threadedly connected to the clamping sleeve (3304).

7. A three - coordinate measuring instrument according to claim 1, wherein, The side detection mechanism (4) includes a side plate (401). The bottom of the side plate (401) is slidably connected to the bottom plate (2). A linear motor (402) is provided on the side of the side plate (401) close to the side clamping mechanism (3). A moving block (403) is sleeved on the guide rail surface of the linear motor (402). A second moving groove (404) is formed on the surface of the moving block (403). The guide rail of the linear motor (402) passes through the second moving groove (404) and is slidably connected to the moving block (403). A first through hole (414) and a second through hole (415) are provided inside the side of the moving block (403) away from the second moving groove (404). There are two first through holes (414). The second through hole (415) is located between the two first through holes (414). A first extension plate (407) is provided inside the first through hole (414). A second extension plate (408) is provided inside the second through hole (415). The first extension plate (407) is slidably connected to the first through hole (414). The second extension plate (408) is slidably connected to the second through hole (415).

8. A three - coordinate measuring instrument according to claim 7, characterized in that, One end of the first extension plate (407) is provided with a limit block, and a first sliding block (405) is provided at the end of the first extension plate (407) away from the limit block. A second through groove (413) is formed in the middle of the first sliding block (405). One end of the second extension plate (408) is provided with a limit block, and a second sliding block (406) is provided at the end of the second extension plate (408) away from the limit block. First through grooves (412) are formed at both the top and bottom of the second sliding block (406).

9. A coordinate measuring machine according to claim 8, wherein, A double-headed push rod (411) is arranged between the first sliding block (405) and the second sliding block (406). The size of the first through groove (412) is matched with the size of the first extension plate (407), and the size of the second through groove (413) is matched with the size of the second extension plate (408). Mounting sleeves (409) are arranged on the sides of the first sliding block (405) and the second sliding block (406) away from each other. Probes (410) are arranged inside both of the two mounting sleeves (409).

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