Metal workpiece inner diameter laser measuring instrument

Abstract

The application discloses a metal workpiece inner diameter laser measuring instrument, which comprises a support, a laser measuring instrument body arranged below the support, and a bottom plate fixedly installed at the bottom end of the support. When the height of the laser measuring instrument body needs to be adjusted, the reciprocating screw rod is reversed, the sleeve block sleeved on the outer wall of the reciprocating screw rod is reversed, the limiting sleeve fixedly installed on the outer wall of the sleeve block is reversed, the limiting rod slidably arranged in the limiting sleeve is reversed, and the limiting disc fixedly installed at the end of the limiting rod slides in the bottom disc. When the end of the limiting rod away from the inclined surface is clamped with the end of the clamping block away from the inclined surface, the limiting rod limits the sleeve block and the reciprocating screw rod. The reversed reciprocating screw rod drives the sleeve block sleeved on the outer wall of the reciprocating screw rod to move up and down, the limiting sleeve and the limiting rod are slidably arranged on the outer wall, the sleeve block moving up and down drives the laser measuring instrument body on the outer side of the sleeve block to move up and down, and the height of the laser measuring instrument body is adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser measurement, in particular to a metal workpiece inner diameter laser measuring instrument. BACKGROUND

[0002] Metal workpiece refers to the parts or products in the machining process, which use metal materials as the machining object. Laser range finder is an instrument that measures the distance to the target by modulating a certain parameter of the laser. It measures the time from emission to reflection of the laser, and then calculates the distance between the laser and the target object based on the principle of constant speed of light. Laser range finder has the advantages of fast measurement speed, high precision and simple operation, and is widely used in topographic survey, battlefield survey, industrial control, mining, port and other fields. The metal workpiece inner diameter laser measuring instrument is an instrument for measuring the inner diameter of metal workpiece. It uses laser technology for measurement and has the characteristics of high precision and non-contact measurement.

[0003] As disclosed in Chinese patent CN118794362B, when the mounting plate drives the main measuring column to descend, the mounting plate drives the control plate and the pressing plate to descend together, so that the pressing plate extrudes the gas in the gas storage air bag into the flow guide frame, so that the gas enters the flow-through groove. The gas is sprayed out through the lower through hole, which is convenient for blowing away the dust in the environment around the first laser ranging assembly. At the same time, since the lower through hole is arranged in an inclined manner, the wind blown out of the lower through hole will also blow to the surface of the first laser ranging assembly, so as to blow away the dust and impurities on the surface of the first laser ranging assembly, thereby greatly reducing the amount of dust in the environment around the first laser ranging assembly, and avoiding the influence of a large amount of dust on the optical measurement accuracy of the laser measuring instrument. Therefore, the first laser ranging assembly can well measure the inner diameter of the metal workpiece.

[0004] For this structure, although the dust around the laser measuring instrument can be cleaned, the measurement steps of the measuring instrument are complicated, which leads to inconvenient measurement. Therefore, we propose a metal workpiece inner diameter laser measuring instrument which can flexibly adjust the measurement and make the measurement more convenient. SUMMARY

[0005] The purpose of the present application is to provide a metal workpiece inner diameter laser measuring instrument to solve the problems raised in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a laser measuring instrument for the inner diameter of a metal workpiece, comprising a support, a laser measuring instrument body disposed below the support, a base plate fixedly installed at the bottom end of the support, and a processing component disposed outside the laser measuring instrument body, the processing component including an adjustment component disposed outside the laser measuring instrument body, a fixing component disposed outside the adjustment component, and a dust blowing component disposed outside the fixing component.

[0007] According to the above technical solution, the adjustment component includes a fixed plate fixedly installed on the bottom side of the bracket. The outer wall of the fixed plate has a sliding groove, and a first spring is fixedly installed on the inner wall of the sliding groove. A limit plate is fixedly installed at the end of the first spring. A locking block is fixedly installed on the side of the limit plate away from the first spring. An installation plate is fixedly installed at the bottom of the fixed plate. A motor is fixedly installed at the bottom of the installation plate. A reciprocating screw is fixedly installed at the output end of the motor. A sleeve block is sleeved on the outer wall of the reciprocating screw. A chassis is rotatably connected to the end of the reciprocating screw away from the motor. A limit sleeve is fixedly installed on the outer wall of the sleeve block. A limit rod is slidably arranged inside the limit sleeve. A limit plate is fixedly installed at the end of the limit rod. A first upright plate is fixedly installed on the side of the sleeve block away from the limit sleeve. A worm gear is rotatably connected inside the first upright plate. A worm wheel meshes with the outer wall of the worm gear. A second upright plate is rotatably connected to the side wall of the worm wheel. A connecting frame is provided on the outer side of the second upright plate.

[0008] According to the above technical solution, the fixing component includes a fixing block fixedly installed on the outer wall of the chassis, a sleeve fixedly installed inside the fixing block, a suction cup fixedly installed at the bottom end of the sleeve, a retaining ring fixedly installed on the inner wall of the sleeve, a second spring fixedly installed on the top surface of the retaining ring, a sealing ring fixedly installed at the end of the second spring away from the retaining ring, a sliding rod fixedly installed on the side of the sealing ring away from the second spring, and a limit ring fixedly installed on the outer wall of the sliding rod.

[0009] According to the above technical solution, the dust blowing assembly includes a support plate fixedly installed on the outer wall of the base plate, an air pump fixedly installed on the top surface of the support plate, an air pipe connected to the top surface of the air pump, and a blowing plate connected to the end of the air pipe away from the air pump.

[0010] According to the above technical solution, the outer wall of the limiting plate is slidably connected to the annular groove opened on the top surface of the chassis, and the outer wall of the limiting rod is inclined. Under its restriction, when the block contacts the inclined surface of the limiting rod, the limiting rod can squeeze the block to adjust the orientation of the laser measuring instrument body.

[0011] According to the above technical solution, there are six locking blocks, which are distributed around the center of the fixed disk. Under the restriction of the six locking blocks, the sleeve block can be restricted by the limiting rod, so that the rotating reciprocating screw can drive the sleeve block to move up and down.

[0012] According to the technical scheme, the sealing ring outer wall is in sealing sliding connection with the sleeve inner part, and the sliding rod outer wall is in sliding connection with the sleeve inner part, under the sealing sliding connection, the sealing ring can suck the air in the sleeve and the suction disc, so that the suction disc is adsorbed to the inner bottom surface of the metal workpiece.

[0013] According to the technical scheme, the air pipe outer wall is fixedly installed with the support inner part, and the blowing plate outer wall is fixedly installed with the support inner side, under the air pipe connection, the air can be supplied to the blowing plate through the air pump.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. The metal workpiece inner diameter laser measuring instrument is composed of an adjusting assembly, when the inner diameter of the metal workpiece needs to be measured, the base plate in the measuring device is placed in the metal workpiece, the base plate is fixed and installed through the fixing assembly, at this time, the motor is started, the reciprocating screw rod fixedly installed at the output end is rotated, when the height of the laser measuring instrument body needs to be adjusted, the reciprocating screw rod is reversed, the sleeve block sleeved on the outer wall of the reciprocating screw rod is reversed, the limiting sleeve fixedly installed on the outer wall of the sleeve block is reversed, the limiting rod slidably arranged in the limiting sleeve is reversed, and the limiting disc fixedly installed at the end of the limiting rod slides in the base plate, when the limiting rod away from one side of the inclined surface is clamped with the clamping block away from one side of the inclined surface, the limiting rod limits the sleeve block and the reciprocating screw rod at this time, the reciprocating screw rod drives the sleeve block sleeved on the outer wall to move up and down, the limiting sleeve and the limiting rod are slidably arranged, the sleeve block moving up and down drives the laser measuring instrument body on the outer side to move up and down, and the height of the laser measuring instrument body is adjusted, when the adjustment is completed, the motor is started at this time to drive the reciprocating screw rod to rotate in the positive direction, the sleeve block sleeved on the outer wall of the reciprocating screw rod is rotated in the positive direction, the limiting rod is rotated by the sleeve block through the limiting sleeve, the inclined surface of the limiting rod is in contact with the inclined surface of the clamping block, the clamping block is extruded to drive the limiting plate to slide into the sliding groove, and the first spring arranged in the sliding groove is compressed, at this time, the limiting rod and the clamping block are no longer clamped, and the laser measuring instrument body whose height is adjusted can be measured to change the direction.

[0016] 2.The metal workpiece inner diameter laser measuring instrument, which is composed of an adjusting assembly, when the angle of the laser measuring instrument body needs to be adjusted, the worm is rotated, the second vertical plate outer wall is fixedly installed with the reciprocating screw outer wall, the worm side wall is rotationally connected with the second vertical plate, the rotating worm drives the meshed worm gear to rotate under the limitation, the worm gear outer wall fixedly installed connecting frame is fixedly installed with the laser measuring instrument body outer wall, the rotating worm gear drives the laser measuring instrument body to rotate with the worm gear center as the rotation center under the limitation, and the laser measuring instrument body measurement direction is adjusted, the worm and the worm gear are meshed and resist, so that the laser measuring instrument body measurement angle can be flexibly adjusted, and the laser measuring instrument body can be more conveniently used.

[0017] 3.The metal workpiece inner diameter laser measuring instrument, which is composed of a fixing assembly, when the metal workpiece inner diameter needs to be measured, the bottom disc is placed in the metal workpiece, the slide rod is pressed, the sealing ring is driven to slide to the suction disc direction, the second spring is compressed through the blocking ring, the suction disc is in contact with the metal workpiece inner bottom surface, the slide rod is released, the sealing ring is pushed away from the blocking ring under the elastic effect of the second spring, the sealing ring is sealed and slides in the sleeve inner portion, the sealing ring drives the air in the sleeve and the suction disc to be sucked, the suction disc is adsorbed to the metal workpiece inner bottom surface, and the bottom disc is fixed on the metal workpiece inner bottom surface, and the bottom disc can be stably fixed, so that the laser measuring instrument body can be stably adjusted and measured.

[0018] 4.The metal workpiece inner diameter laser measuring instrument, which is composed of a dust blowing assembly, when the metal workpiece inner diameter needs to be measured, dust in the metal needs to be cleaned to ensure the measurement data accuracy, the air pump is started, air is input into the blowing plate through the air pipe, the air is sprayed out through the blowing plate, dust at the measurement position is blown and cleaned, and the dust influence on the measurement data accuracy is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application, and should not be taken as limiting the application. In the drawings:

[0020] Figure 1 It is a perspective front structure schematic view of the metal workpiece inner diameter laser measuring instrument.

[0021] Figure 2 It is a perspective adjusting assembly, fixing assembly and dust blowing assembly schematic view of the metal workpiece inner diameter laser measuring instrument.

[0022] Figure 3 It is an adjusting assembly schematic view of the metal workpiece inner diameter laser measuring instrument.

[0023] Figure 4 It is the section view of the adjusting assembly of the metal workpiece inner diameter laser measuring instrument of the present application.

[0024] Figure 5 It is the local view of the adjusting assembly of the metal workpiece inner diameter laser measuring instrument of the present application.

[0025] Figure 6 It is the fixing assembly view of the metal workpiece inner diameter laser measuring instrument of the present application.

[0026] Figure 7 It is the section view of the fixing assembly of the metal workpiece inner diameter laser measuring instrument of the present application.

[0027] Figure 8 It is the dust blowing assembly view of the metal workpiece inner diameter laser measuring instrument of the present application.

[0028] Figure 9 It is the local view of the dust blowing assembly of the metal workpiece inner diameter laser measuring instrument of the present application.

[0029] In the figure: 1, support; 2, laser measuring instrument body; 3, bottom plate; 4, processing assembly; 41, adjusting assembly; 43, fixing assembly; 44, dust blowing assembly; 411, fixing disc; 412, sliding groove; 413, first spring; 414, limiting plate; 415, clamping block; 416, mounting plate; 417, motor; 418, reciprocating screw rod; 419, sleeve block; 420, bottom disc; 421, limiting disc; 422, limiting rod; 423, first vertical plate; 424, worm; 425, worm wheel; 426, second vertical plate; 427, connecting support; 428, limiting sleeve; 431, fixing block; 432, sleeve; 433, suction cup; 434, retaining ring; 435, second spring; 436, sealing ring; 437, sliding rod; 438, limiting ring; 441, support plate; 442, air pump; 443, air pipe; 444, blowing plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0031] Examples of the described embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0032] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0034] Embodiment 1: A preferred embodiment of a metal workpiece inner diameter laser measuring instrument provided by the present application is shown in the figure Figures 1 to 9 The metal workpiece inner diameter laser measuring instrument comprises a support 1;

[0035] A laser measuring instrument body 2 is arranged below the support 1;

[0036] A bottom plate 3 is fixedly installed at the bottom end of the support 1;

[0037] And the processing assembly 4 arranged outside the laser measuring instrument body 2, the processing assembly 41 arranged outside the laser measuring instrument body 2, the fixing disc 411 fixedly installed on the bottom side of the support 1, the outer wall of the fixing disc 411 is provided with a sliding groove 412, the inner wall of the sliding groove 412 is fixedly installed with a first spring 413, the end of the first spring 413 is fixedly installed with a limiting plate 414, the side away from the first spring 413 of the limiting plate 414 is fixedly installed with a clamping block 415, the bottom of the fixing disc 411 is fixedly installed with a mounting plate 416, the bottom of the mounting plate 416 is fixedly installed with a motor 417, the output end of the motor 417 is fixedly installed with a reciprocating screw rod 418, the outer wall of the reciprocating screw rod 418 is sleeved with a sleeve block 419, the end away from the motor 417 of the reciprocating screw rod 418 is rotatably connected with a bottom disc 420, the outer wall of the sleeve block 419 is fixedly installed with a limiting sleeve 428, the inside of the limiting sleeve 428 is slidably provided with a limiting rod 422, the end of the limiting rod 422 is fixedly installed with a limiting disc 421, the side away from the limiting sleeve 428 of the sleeve block 419 is fixedly installed with a first vertical plate 423, the inside of the first vertical plate 423 is rotatably connected with a worm 424, the outer wall of the worm 424 is engaged with a worm gear 425, the side wall of the worm gear 425 is rotatably connected with a second vertical plate 426, the outside of the second vertical plate 426 is provided with a connecting frame 427.

[0038] When the inner diameter of the metal workpiece needs to be measured in the embodiment, the base plate 420 in the measuring device is placed inside the metal workpiece, and the base plate 420 is fixed and installed through the fixing assembly 43. At this time, the motor 417 is started, and the reciprocating screw rod 418 fixedly installed at the output end rotates. When the height adjustment of the laser measuring instrument body 2 needs to be measured, the reciprocating screw rod 418 is reversed, and the sleeve block 419 sleeved on the outer wall of the reciprocating screw rod 418 is reversed. The sleeve block 419 drives the limiting sleeve 428 fixedly installed on the outer wall thereof to reverse, and the limiting sleeve 428 drives the limiting rod 422 slidingly arranged in the limiting sleeve 428 to reverse. The limiting disc 421 fixedly installed at the end of the limiting rod 422 slides in the base plate 420. When the limiting rod 422 away from the side of the inclined surface is clamped with the clamping block 415 away from the side of the inclined surface, the limiting rod 422 limits the sleeve block 419 and the reciprocating screw rod 418 at this time. The reciprocating screw rod 418 drives the sleeve block 419 sleeved on the outer wall thereof to move up and down, so that the limiting sleeve 428 and the limiting rod 422 are slidingly arranged. The sleeve block 419 moving up and down drives the laser measuring instrument body 2 on the outer side thereof to move up and down, and the height adjustment of the laser measuring instrument body 2 is measured. When the adjustment is completed, the motor 417 is started at this time to drive the reciprocating screw rod 418 to rotate in the positive direction. The sleeve block 419 sleeved on the outer wall of the reciprocating screw rod 418 is reversed, and the sleeve block 419 drives the limiting rod 422 to rotate through the limiting sleeve 428, so that the inclined surface of the limiting rod 422 is in contact with the inclined surface of the clamping block 415. The clamping block 415 is pressed to drive the limiting plate 414 to slide into the sliding groove 412, and the first spring 413 arranged in the sliding groove 412 is compressed. At this time, the limiting rod 422 and the clamping block 415 are no longer clamped, and the measurement direction of the laser measuring instrument body 2 after the height adjustment can be changed. When the clamping block 415 is not pressed, the limiting plate 414 is pushed to the outside of the sliding groove 412 under the elastic action of the first spring 413, so as to reset and push the clamping block 415. The structure can adjust the height of the laser measuring instrument body 2, and can also adjust the measurement direction of the laser measuring instrument body 2, so that it can be used flexibly. When the measurement angle of the laser measuring instrument body 2 needs to be adjusted, the worm 424 is rotated at this time. Since the second vertical plate 426 and the reciprocating screw rod 418 are fixedly installed on the outer wall, and the worm gear 425 is rotationally connected with the second vertical plate 426, the worm 424 drives the worm gear 425 to rotate under the limitation. Since the connecting frame 427 fixedly installed on the outer wall of the worm gear 425 and the laser measuring instrument body 2 are fixedly installed on the outer wall, the worm gear 425 drives the laser measuring instrument body 2 to rotate around the center of the worm gear 425 under the limitation. The measurement direction of the laser measuring instrument body 2 is adjusted. Since the worm 424 and the worm gear 425 are meshed and have resistance, it is not necessary to limit them. The structure can flexibly adjust the measurement angle of the laser measuring instrument body 2, so that the laser measuring instrument body 2 can be used more simply.

[0039] Embodiment 2: a preferred embodiment of the metal workpiece inner diameter laser measuring instrument provided by the application Figures 1 to 9 As shown: the fixing assembly 43 comprises a fixing block 431 fixedly installed on the outer wall of the base plate 420, a sleeve 432 fixedly installed inside the fixing block 431, a suction disc 433 fixedly installed at the bottom end of the sleeve 432, a stop ring 434 fixedly installed on the inner wall of the sleeve 432, a second spring 435 fixedly installed on the top surface of the stop ring 434, a sealing ring 436 fixedly installed on the end of the second spring 435 away from the stop ring 434, a sliding rod 437 fixedly installed on the side of the sealing ring 436 away from the second spring 435, and a limiting ring 438 fixedly installed on the outer wall of the sliding rod 437.

[0040] In this embodiment, when the inner diameter of the metal workpiece needs to be measured, the base plate 420 is placed inside the metal workpiece, the sliding rod 437 is pressed, the sealing ring 436 is driven by the sliding rod 437 to slide towards the suction disc 433, the second spring 435 is compressed through the stop ring 434, the suction disc 433 is in contact with the inner bottom surface of the metal workpiece, at this time the sliding rod 437 is released, the sealing ring 436 is pushed away from the stop ring 434 under the elastic action of the second spring 435, the sealing ring 436 is sealed and slides inside the sleeve 432, and under the limitation thereof, the sealing ring 436 drives the air inside the sleeve 432 and the suction disc 433 to suck, so that the suction disc 433 is adsorbed to the inner bottom surface of the metal workpiece, so as to fix the base plate 420 to the inner bottom surface of the metal workpiece. The structure can stably fix the base plate 420, so that the laser measuring instrument body 2 can be stably adjusted and measured.

[0041] Embodiment 3: a preferred embodiment of the metal workpiece inner diameter laser measuring instrument provided by the application Figures 1 to 9 As shown: the dust blowing assembly 44 comprises a support plate 441 fixedly installed on the outer wall of the base plate 3, a gas pump 442 fixedly installed on the top surface of the support plate 441, a gas pipe 443 communicatively arranged on the top surface of the gas pump 442, and a blowing plate 444 communicatively arranged on the end of the gas pipe 443 away from the gas pump 442.

[0042] In this embodiment, when the inner diameter of the metal workpiece needs to be measured, in order to make the measurement data accurate, the dust inside the metal workpiece needs to be cleaned, at this time the gas pump 442 is started, air is supplied to the inside of the blowing plate 444 through the gas pipe 443, the air is sprayed out through the blowing plate 444, the dust at the measurement position is blown and cleaned, and the influence of the dust on the measurement data accuracy is avoided.

[0043] The limiting disc 421 is slidably arranged on the top surface of the base plate 420, and the outer wall of the limiting disc 421 is obliquely arranged. When the clamping block 415 is in contact with the inclined surface of the limiting rod 422, the limiting rod 422 can extrude the clamping block 415 to adjust the direction of the laser measuring instrument body 2.

[0044] The six card blocks 415 are distributed on the circumference of the center of the disc 411, and the sleeve block 419 is limited by the limiting rod 422 under the limitation of the six card blocks 415, so that the reciprocating wire rod 418 can drive the sleeve block 419 to move up and down.

[0045] The outer wall of the sealing ring 436 is sealed and slides with the inner part of the sleeve 432, and the outer wall of the sliding rod 437 is arranged to slide with the inner part of the sleeve 432. Under the limitation of the sealing sliding, the sealing ring 436 can suck the air in the inner part of the sleeve 432 and the suction disc 433, so as to adsorb the inner bottom surface of the metal workpiece.

[0046] The outer wall of the air pipe 443 is fixedly installed in the inner part of the support 1, and the outer wall of the blowing plate 444 is fixedly installed on the inner side of the support 1. Under the connection limitation of the air pipe 443, the blowing plate 444 can be supplied with air by the air pump 442.

[0047] It should be noted that the relational terms herein such as first and second and the like are used only to differentiate one entity or operation from another, and do not necessarily require or imply that these entities or operations exist in any actual relationship or order. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the processes, methods, articles or equipment including a series of elements not only include those elements, but also include other elements not explicitly listed or inherent to such processes, methods, articles or equipment.

[0048] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A metal workpiece inner diameter laser measuring instrument, comprising a support (1); A laser measuring instrument body (2) is arranged below the support (1); The bottom end of the support (1) is fixedly installed with a bottom plate (3); and a machining assembly (4) arranged outside the laser measuring instrument body (2), characterized in that: The processing assembly (4) comprises an adjusting assembly (41) arranged outside the laser measuring instrument body (2), a fixing assembly (43) is arranged outside the adjusting assembly (41), and a dust blowing assembly (44) is arranged outside the fixing assembly (43); The adjusting assembly (41) comprises a fixed disc (411) fixedly installed at the bottom side of the support (1), a sliding groove (412) is formed in the outer wall of the fixed disc (411), a first spring (413) is fixedly installed in the inner wall of the sliding groove (412), a limiting plate (414) is fixedly installed at the end of the first spring (413), a clamping block (415) is fixedly installed on the side of the limiting plate (414) away from the first spring (413), an installation plate (416) is fixedly installed at the bottom of the fixed disc (411), a motor (417) is fixedly installed at the bottom of the installation plate (416), a reciprocating lead screw (418) is fixedly installed at the output end of the motor (417), a sleeve block (419) is sleeved on the outer wall of the reciprocating lead screw (418), a bottom disc (420) is rotatably connected to the end of the reciprocating lead screw (418) away from the motor (417), a limiting sleeve (428) is fixedly installed on the outer wall of the sleeve block (419), a limiting rod (422) is slidably arranged in the limiting sleeve (428), a limiting disc (421) is fixedly installed at the end of the limiting rod (422), a first vertical plate (423) is fixedly installed on the side of the sleeve block (419) away from the limiting sleeve (428), a worm (424) is rotatably connected in the first vertical plate (423), a worm wheel (425) is engaged with the outer wall of the worm (424), a second vertical plate (426) is rotatably connected to the side wall of the worm wheel (425), and a connecting support (427) is arranged on the outer side of the second vertical plate (426). The outer wall of the limiting disc (421) and the top surface of the bottom disc (420) are slidably arranged in an annular groove, and the outer wall of the limiting rod (422) is inclined. The number of clamping blocks (415) is six, which are distributed in a circumferential direction of the center of the fixed disc (411).

2. The laser instrument for measuring the inner diameter of a metal workpiece according to claim 1, characterized in that: The fixing assembly (43) comprises a fixed block (431) fixedly installed on the outer wall of the bottom disc (420), a sleeve pipe (432) is fixedly installed in the fixed block (431), a suction disc (433) is fixedly installed at the bottom end of the sleeve pipe (432), a blocking ring (434) is fixedly installed on the inner wall of the sleeve pipe (432), a second spring (435) is fixedly installed on the top surface of the blocking ring (434), a sealing ring (436) is fixedly installed at the end of the second spring (435) away from the blocking ring (434), a sliding rod (437) is fixedly installed on the side of the sealing ring (436) away from the second spring (435), and a limiting ring (438) is fixedly installed on the outer wall of the sliding rod (437).

3. The laser instrument for measuring the inner diameter of a metal workpiece according to claim 2, characterized in that: The dust blowing assembly (44) comprises a supporting plate (441) fixedly installed on the outer wall of the bottom plate (3), a gas pump (442) fixedly installed on the top surface of the supporting plate (441), and a gas pipe (443) in communication with the top surface of the gas pump (442), wherein one end of the gas pipe (443) away from the gas pump (442) is in communication with a blowing plate (444).

4. The laser instrument for measuring the inner diameter of a metal workpiece according to claim 3, characterized in that: The outer wall of the sealing ring (436) is in sealing sliding communication with the inner part of the sleeve (432), and the outer wall of the sliding rod (437) is in sliding communication with the inner part of the sleeve (432).

5. The laser instrument for measuring the inner diameter of a metal workpiece according to claim 4, characterized in that: The outer wall of the gas pipe (443) is fixedly installed in the inner part of the support (1), and the outer wall of the blowing plate (444) is fixedly installed on the inner side of the support (1).

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