Large workpiece measuring and marking device

Abstract

The utility model discloses a large-scale workpiece measuring and scribing device, which belongs to the technical field of measuring and scribing, and comprises an X-axis moving assembly, the protection assembly comprises a follow-up type annular blocking assembly, a supporting frame, scraping assemblies and a plug-in type collecting assembly, the X-axis moving assembly is connected with the supporting frame, the follow-up type annular blocking assembly is connected with the X-axis moving assembly, the scraping assemblies are located at the two ends of the supporting frame, the plug-in type collecting assembly is connected with the supporting frame, and the plug-in type collecting assembly is located on the outer sides of the scraping assemblies. The follow-up type annular blocking assembly is in attached contact with the scraping assembly. The top of the X-axis moving assembly is connected with a Z-axis driving assembly; the movable end of the Z-axis driving assembly is connected with a Y-axis moving assembly; one end of the Y-axis moving assembly is connected with a measuring probe in contact with a workpiece. By means of the mode, the measuring probe can move in the three-coordinate direction for detection, actual use is facilitated, and meanwhile collected chippings can be discharged conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement and marking, in particular to a large workpiece measuring and marking device. Background Art

[0002] A coordinate measuring machine is an instrument with a detector that can move in three directions and can move on three mutually perpendicular guide rails. The detector transmits signals by contact or non-contact means. The three-axis displacement measurement system (such as an optical ruler) calculates the coordinates (X, Y, Z) of each point on the workpiece and various functional measurements through a data processor or computer.

[0003] For example, Chinese patent CN201736214U discloses a three-coordinate measuring marking machine follow-up operating table, which is composed of an operating table, a mobile support device, and a connecting device. The operating table is connected to the base of the three-coordinate measuring marking machine through the connecting device. When the three-coordinate measuring marking machine moves along the guide rail on the surface of the guide rail platform, the three-coordinate measuring marking machine follow-up operating table follows the movement.

[0004] However, the base and guide rails of the three-coordinate measuring machine are in an exposed state. The three-coordinate measuring machine is generally installed on the side of a large processing equipment. The metal debris generated by the processing equipment on the large workpiece will fall onto the base and guide rails of the three-coordinate measuring machine. The debris will increase the friction between the base and guide rails of the three-coordinate measuring machine, which will easily affect sliding after long-term use, which is not conducive to long-term use.

[0005] Based on this, the utility model designs a large workpiece measuring and marking device to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a large workpiece measuring and marking device.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A large workpiece measuring and marking device includes an X-axis moving assembly for moving a measuring probe in the X-axis direction:

[0009] The X-axis moving assembly is connected to a protection assembly for blocking and collecting machining debris;

[0010] The protection assembly includes a follower annular blocking assembly, a support frame, a scraping assembly and a plug-in collecting assembly. The X-axis moving assembly is connected to the support frame, the follower annular blocking assembly is connected to the X-axis moving assembly, the scraping assemblies are located at both ends of the support frame, the plug-in collecting assembly is connected to the support frame, and the plug-in collecting assembly is located outside the scraping assembly. The follower annular blocking assembly is in close contact with the scraping assembly.

[0011] The top of the X-axis moving assembly is connected to a Z-axis driving assembly for moving the measuring probe in the Z-axis direction;

[0012] The movable end of the Z-axis driving assembly is connected to a Y-axis moving assembly for moving the measuring probe in the Y-axis direction;

[0013] One end of the Y-axis moving component is connected to a measuring probe that contacts the workpiece.

[0014] Furthermore, the follower annular blocking assembly includes an annular belt and support rollers. The inner wall of the support frame is symmetrically connected to four groups of support rollers for front, back and up and down rotation. The outer wall of the support roller is rotatably connected to the inner wall of the annular belt, and the two ends of the annular belt are fixedly connected to the X-axis moving assembly.

[0015] Furthermore, the side wall of the annular belt is slidably connected to the inner wall of the support frame.

[0016] Furthermore, the scraping assembly includes a scraper, and the front and rear side ends of the support frame are fixedly connected with the scraper. The scraper is set at an angle, and the upper end of the scraper is slidably connected to the outer wall of the annular belt.

[0017] Furthermore, the plug-in collection component includes an insert block, a transverse groove and a material box. The inner walls of the front and rear sides of the support frame are provided with transverse grooves. The left and right ends of the material box are fixedly connected with insert blocks, which are plugged into the transverse grooves. The inner end of the material box is located below the scraper.

[0018] Furthermore, the X-axis moving assembly includes a support plate, a first gripping rod, a guide rail, a slider, a support base plate and an X-axis direction transmission light rod. The support base plate is fixedly installed on the inner wall of the support frame. The guide rail and the X-axis direction transmission light rod are fixedly connected to the support base plate. The slider is connected to the guide rail with limited sliding connection. The top of the guide rail is fixedly connected to the support plate. The front side wall of the support plate is fixedly connected to the first gripping rod. The Z-axis drive assembly is installed on the top of the support plate, and the two ends of the annular belt are fixedly connected to the front and rear side walls of the support plate.

[0019] Furthermore, the Z-axis drive assembly includes a top plate, a steel rope, a fixed pulley, a Z-axis transmission rod, a support rod, a sliding cylinder, a support cylinder and a counterweight. The support cylinder and the support rod are fixedly installed on the top of the support plate, and the support rod is located on the left, right and rear sides of the support cylinder. The counterweight is slidably connected inside the support cylinder, the support rod and the top of the support cylinder are fixedly connected to the top plate, the top of the top plate is fixedly connected to the fixed pulley, the fixed pulley is rotatably connected to the steel rope, the rear end of the steel rope passes through the top plate and is fixedly connected to the top of the counterweight, the front end of the steel rope is fixedly connected to the sliding cylinder, the sliding cylinder is slidably connected to the outer wall of the support cylinder through a straight hole, the Y-axis moving assembly is fixedly connected to the lower end of the front side wall of the sliding cylinder, the side wall of the sliding cylinder is fixedly connected to the sliding block, the sliding block is slidably connected to the Z-axis transmission rod through a sliding hole, and the upper and lower ends of the Z-axis transmission rod are respectively fixedly connected to the bottom of the top plate and the top of the support plate.

[0020] Furthermore, the sum of the weights of the Y-axis moving assembly, the measuring probe, the sliding cylinder and the sliding block is the same as the weight of the counterweight.

[0021] Furthermore, the sliding friction between the sliding tube and the supporting tube is greater than the sliding friction between the counterweight and the supporting tube.

[0022] Furthermore, the Y-axis moving assembly includes a Y-axis direction transmission light rod, a polygonal rod, a fixing part, a second grip rod, a rotating wheel and a support frame. The support frame is fixedly installed at the lower end of the front side wall of the sliding cylinder. The sliding cylinder is symmetrically installed and rotatably connected to the rotating wheel on the left and right and up and down. The polygonal rod is movably connected between the rotating wheels. The Y-axis direction transmission light rod is installed in the groove opened on the side wall of the polygonal rod. The second grip rod is fixedly connected to the bottom of the support frame. The side wall of the support frame is movably connected to the fixing part. The inner end of the fixing part is in contact with the side wall of the polygonal rod. The measuring probe is fixedly installed at one end of the polygonal rod.

[0023] Compared with the prior art, the present invention has the following beneficial effects: the present invention drives the X-axis moving component to move in the support frame, the X-axis moving component drives the measuring probe to move in the X-axis direction, and then the Z-axis driving component drives the measuring probe to move in the Z-axis direction, and the Y-axis moving component drives the measuring probe to move in the Y-axis direction, so as to realize the movement detection of the measuring probe in the three-coordinate directions, which is convenient for practical use. At the same time, the processing debris falls on the follower annular blocking component, the X-axis moving component drives the follower annular blocking component to rotate, and the follower annular blocking component is in sliding contact with the scraping component. The scraping component scrapes the debris on the outer wall of the follower annular blocking component and drops it into the plug-in collecting component, which is convenient for blocking and collecting the processing debris, avoiding the processing debris from falling into the X-axis moving component and affecting the movement of the X-axis moving component. In addition, the plug-in collecting component is easy to remove from the support frame, so that the collected debris can be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0025] Figure 1 This is a three-dimensional large workpiece measuring and marking device of the utility model. Figure 1 ;

[0026] Figure 2 This is a front view of a large workpiece measuring and marking device according to the present invention;

[0027] Figure 3This is a left view of a large workpiece measuring and marking device according to the present invention;

[0028] Figure 4 This is a three-dimensional large workpiece measuring and marking device of the utility model. Figure 2 ;

[0029] Figure 5 This is a three-dimensional large workpiece measuring and marking device of the utility model. Figure 3 ;

[0030] Figure 6 To follow Figure 2 AA direction cross-sectional view;

[0031] Figure 7 To follow Figure 3 BB direction cross-sectional view;

[0032] Figure 8 To follow Figure 3 CC direction cross-sectional view.

[0033] The numbers in the figure represent:

[0034] 1. X-axis moving assembly; 11. Support plate; 12. First gripping rod; 13. Guide rail; 14. Slider; 15. Support base plate; 16. X-axis transmission rod; 2. Protection assembly; 21. Insert block; 22. Annular belt; 23. Support frame; 24. Scraper; 25. Horizontal groove; 26. Material box; 27. Support roller; 3. Y-axis moving assembly; 31. Y-axis transmission rod; 32. Polygonal rod; 33. Fixing part; 34. Second gripping rod; 35. Rotating wheel; 36. Support frame; 4. Z-axis driving assembly; 41. Top plate; 42. Steel rope; 43. Fixed pulley; 44. Z-axis transmission rod; 45. Support rod; 46. Sliding cylinder; 47. Support cylinder; 48. Counterweight; 49. Sliding block; 5. Measuring probe. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0037] Example 1: Please refer to Figures 1-8 A large workpiece measuring and marking device includes an X-axis moving component 1 for moving a measuring probe 5 in an X-axis direction:

[0038] The X-axis moving assembly 1 is connected to a protection assembly 2 for blocking and collecting machining debris;

[0039] The protection assembly 2 includes a follower annular blocking assembly, a support frame 23, a scraping assembly and a plug-in collecting assembly. The X-axis moving assembly 1 is connected to the support frame 23, the follower annular blocking assembly is connected to the X-axis moving assembly 1, the scraping assemblies are located at both ends of the support frame 23, the plug-in collecting assembly is connected to the support frame 23, and the plug-in collecting assembly is located outside the scraping assembly. The follower annular blocking assembly is in close contact with the scraping assembly.

[0040] The top of the X-axis moving assembly 1 is connected to a Z-axis driving assembly 4 for moving the measuring probe 5 in the Z-axis direction;

[0041] The movable end of the Z-axis driving assembly 4 is connected to a Y-axis moving assembly 3 for moving the measuring probe 5 in the Y-axis direction;

[0042] One end of the Y-axis moving assembly 3 is connected to a measuring probe 5 that contacts the workpiece;

[0043] The X-axis moving component 1 is pushed to move in the support frame 23, and the X-axis moving component 1 drives the measuring probe 5 to move in the X-axis direction. Then the Z-axis driving component 4 drives the measuring probe 5 to move in the Z-axis direction, and the Y-axis moving component 3 drives the measuring probe 5 to move in the Y-axis direction, so as to realize the movement detection of the measuring probe 5 in the three-coordinate directions, which is convenient for practical use. At the same time, the processing debris falls on the follower annular blocking component, and the X-axis moving component 1 drives the follower annular blocking component to rotate. The follower annular blocking component is in sliding contact with the scraping component, and the scraping component scrapes the debris on the outer wall of the follower annular blocking component and drops it into the plug-in collection component, which is convenient for blocking and collecting the processing debris, avoiding the processing debris from falling into the X-axis moving component 1, and avoiding affecting the movement of the X-axis moving component 1. In addition, the plug-in collection component is easy to remove from the support frame 23, so that the collected debris can be discharged.

[0044] The follower annular blocking assembly includes an annular belt 22 and support rollers 27. The inner wall of the support frame 23 is symmetrically connected to four groups of support rollers 27 for rotation front and back and up and down. The outer wall of the support roller 27 is rotationally connected to the inner wall of the annular belt 22. The two ends of the annular belt 22 are fixedly connected to the X-axis moving assembly 1.

[0045] The side wall of the annular belt 22 is slidably connected to the inner wall of the support frame 23 .

[0046] The scraping assembly includes a scraper 24. The front and rear ends of the support frame 23 are fixedly connected with the scraper 24. The scraper 24 is set at an angle. The upper end of the scraper 24 is in sliding contact with the outer wall of the annular belt 22.

[0047] The plug-in collection assembly includes an insert block 21, a transverse groove 25, and a material box 26. The transverse grooves 25 are provided on the inner walls of the front and rear sides of the support frame 23. The insert blocks 21 are fixedly connected to the left and right ends of the material box 26. The insert blocks 21 are plugged into the transverse grooves 25. The inner end of the material box 26 is located below the scraper 24.

[0048] The plug-in block 21 of the plug-in collecting assembly of the protection assembly 2 is inserted into the transverse groove 25, and the transverse groove 25 drives the material box 26 to be inserted under the scraper 24, and the processing debris falls onto the annular belt 22 of the follower annular blocking assembly. When the X-axis moving assembly 1 moves, the X-axis moving assembly 1 drives the annular belt 22 to rotate along the support roller 27, and the annular belt 22 moves along the scraper 24. The scraper 24 scrapes the debris collected on the annular belt 22 and drops it into the material box 26, which is convenient for blocking and collecting the processing debris and preventing the processing debris from falling into the X-axis moving assembly 1 and affecting the movement of the X-axis moving assembly 1. In addition, after the material box 26 is full, the material box 26 of the plug-in collecting assembly drives the plug-in block 21 to be taken out from the transverse groove 25, and the material box 26 is convenient for being taken out from the support frame 23, so that the collected debris can be discharged conveniently.

[0049] The X-axis moving assembly 1 includes a support plate 11, a first gripping rod 12, a guide rail 13, a slider 14, a support base plate 15 and an X-axis direction transmission light rod 16. The support base plate 15 is fixedly installed on the inner wall of the support frame 23. The guide rail 13 and the X-axis direction transmission light rod 16 are fixedly connected to the support base plate 15. The slider 14 is connected to the guide rail 13 in a limited sliding connection. The top of the guide rail 13 is fixedly connected to the support plate 11. The front side wall of the support plate 11 is fixedly connected to the first gripping rod 12. The Z-axis drive assembly 4 is installed on the top of the support plate 11. The two ends of the annular belt 22 are fixedly connected to the front and rear side walls of the support plate 11.

[0050] Push the first gripping rod 12, and with the cooperation of the guide rail 13 and the slider 14, the first gripping rod 12 drives the support plate 11 to move along the support frame 23, and the support plate 11 drives the measuring probe 5 to move in the X-axis direction. The X-axis direction transmission light rod 16 monitors the moving distance of the support plate 11 in the X-axis direction, which facilitates the movement of the measuring probe 5 in the X-axis direction. At the same time, the support plate 11 drives the annular belt 22 to rotate along the support roller 27, which facilitates the movement of the annular belt 22.

[0051] The Z-axis drive assembly 4 includes a top plate 41, a steel rope 42, a fixed pulley 43, a Z-axis transmission light rod 44, a support rod 45, a sliding cylinder 46, a support cylinder 47 and a counterweight 48. The support cylinder 47 and the support rod 45 are fixedly installed on the top of the support plate 11, and the support rod 45 is located on the left, right and rear sides of the support cylinder 47. The counterweight 48 is fitted and slidably connected in the support cylinder 47. The top of the support rod 45 and the support cylinder 47 are fixedly connected to the top plate 41. The top of the top plate 41 is fixedly connected to the fixed pulley 43. The fixed pulley 43 is rotatably connected to the steel rope 42. Rope 42, the rear end of the steel rope 42 passes through the top plate 41 and is fixedly connected to the top of the counterweight block 48, the front end of the steel rope 42 is fixedly connected to the sliding cylinder 46, the sliding cylinder 46 is slidingly connected to the outer wall of the support cylinder 47 through a straight hole, the Y-axis moving component 3 is fixedly connected to the lower end of the front side wall of the sliding cylinder 46, the side wall of the sliding cylinder 46 is fixedly connected to the sliding block 49, the sliding block 49 is slidingly connected to the Z-axis direction transmission rod 44 through a sliding hole, and the upper and lower ends of the Z-axis direction transmission rod 44 are fixedly connected to the bottom of the top plate 41 and the top of the support plate 11 respectively.

[0052] The sum of the weights of the Y-axis moving assembly 3 , the measuring probe 5 , the sliding cylinder 46 and the sliding block 49 is the same as the weight of the counterweight 48 .

[0053] The sliding friction between the sliding cylinder 46 and the supporting cylinder 47 is greater than the sliding friction between the counterweight 48 and the supporting cylinder 47;

[0054] The sliding cylinder 46 is driven to move along the supporting cylinder 47. The counterweight 48, the fixed pulley 43 and the steel rope 42 cooperate to balance the Y-axis moving component 3, the measuring probe 5, the sliding cylinder 46 and the sliding block 49. The sliding friction between the sliding cylinder 46 and the supporting cylinder 47 is greater than the sliding friction between the counterweight 48 and the supporting cylinder 47, so that the sliding cylinder 46 is stationary outside the supporting cylinder 47, which facilitates the driving of the measuring probe 5 to move in the Z-axis direction. The sliding block 49 and the Z-axis transmission rod 44 cooperate to monitor the moving distance of the measuring probe 5 in the Z-axis direction.

[0055] The Y-axis moving assembly 3 includes a Y-axis direction transmission light rod 31, a polygonal rod 32, a fixing piece 33, a second gripping rod 34, a rotating wheel 35 and a support frame 36. The support frame 36 is fixedly installed at the lower end of the front side wall of the sliding cylinder 46. The sliding cylinder 46 is symmetrically installed and rotatably connected to the rotating wheel 35. The polygonal rod 32 is movably connected between the rotating wheels 35. The Y-axis direction transmission light rod 31 is installed in the groove opened in the side wall of the polygonal rod 32. The second gripping rod 34 is fixedly connected to the bottom of the support frame 36. The side wall of the support frame 36 is movably connected to the fixing piece 33. The inner end of the fixing piece 33 is in contact with the side wall of the polygonal rod 32. The measuring probe 5 is fixedly installed at one end of the polygonal rod 32.

[0056] The fixing member 33 is a bolt;

[0057] Loosen the fixing part 33 and pull the polygonal rod 32 to move along the rotating wheel 35. The friction between the rotating wheel 35 and the polygonal rod 32 is small, which facilitates the movement of the polygonal rod 32. After the polygonal rod 32 moves to the set position, the fixing part 33 is rotated to contact the polygonal rod 32 to lock the polygonal rod 32, making it convenient to drive the measuring probe 5 to move in the Y-axis direction. The Y-axis direction transmission light rod 31 monitors the moving distance of the measuring probe 5 in the Y-axis direction.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A large workpiece measuring and marking device, comprising an X-axis moving assembly (1) for moving a measuring probe (5) in the X-axis direction, characterized in that: The X-axis moving assembly (1) is connected to a protection assembly (2) for blocking and collecting machining debris; The protection component (2) includes a follower annular blocking component, a support frame (23), a scraping component and a plug-in collecting component. The X-axis moving component (1) is connected to the support frame (23), the follower annular blocking component is connected to the X-axis moving component (1), the scraping components are located at both ends of the support frame (23), the plug-in collecting component is connected to the support frame (23), and the plug-in collecting component is located outside the scraping component. The follower annular blocking component is in close contact with the scraping component. The top of the X-axis moving assembly (1) is connected to a Z-axis driving assembly (4) for moving the measuring probe (5) in the Z-axis direction; The movable end of the Z-axis driving component (4) is connected to a Y-axis moving component (3) for moving the measuring probe (5) in the Y-axis direction; One end of the Y-axis moving component (3) is connected to a measuring probe (5) that contacts the workpiece.

2. The large workpiece measuring and marking device according to claim 1, characterized in that: The follower annular blocking assembly comprises an annular belt (22) and support rollers (27); the inner wall of the support frame (23) is symmetrically connected to four groups of support rollers (27) in a front-back and top-bottom rotation manner; the outer walls of the support rollers (27) are rotatably connected to the inner wall of the annular belt (22); and both ends of the annular belt (22) are fixedly connected to the X-axis moving assembly (1).

3. The large workpiece measuring and marking device according to claim 2, characterized in that: The side wall of the annular belt (22) is in close contact and sliding connection with the inner wall of the support frame (23).

4. The large workpiece measuring and marking device according to claim 3, characterized in that: The scraping assembly comprises a scraper (24). The front and rear side ends of the support frame (23) are fixedly connected with the scraper (24). The scraper (24) is arranged obliquely. The upper end of the scraper (24) is in sliding contact with the outer wall of the annular belt (22).

5. The large workpiece measuring and marking device according to claim 4, characterized in that: The plug-in type collecting assembly comprises an insert block (21), a transverse groove (25) and a material box (26). The transverse groove (25) is provided on the inner walls of the front and rear sides of the support frame (23). The left and right ends of the material box (26) are fixedly connected with the insert blocks (21). The insert blocks (21) are plugged into the transverse groove (25). The inner end of the material box (26) is located below the scraper (24).

6. The large workpiece measuring and marking device according to claim 5, characterized in that: The X-axis moving assembly (1) comprises a support plate (11), a first gripping rod (12), a guide rail (13), a slider (14), a support base plate (15) and an X-axis direction transmission light rod (16); the support base plate (15) is fixedly mounted on the inner wall of the support frame (23); the guide rail (13) and the X-axis direction transmission light rod (16) are fixedly connected to the support base plate (15); the slider (14) is connected to the guide rail (13) in a limited sliding manner; the top of the guide rail (13) is fixedly connected to the support plate (11); the front side wall of the support plate (11) is fixedly connected to the first gripping rod (12); the Z-axis driving assembly (4) is mounted on the top of the support plate (11); and the two ends of the annular belt (22) are fixedly connected to the front and rear side walls of the support plate (11).

7. The large workpiece measuring and marking device according to claim 6, characterized in that: The Z-axis driving assembly (4) comprises a top plate (41), a steel rope (42), a fixed pulley (43), a Z-axis direction transmission light rod (44), a support rod (45), a sliding cylinder (46), a support cylinder (47) and a counterweight (48). The support cylinder (47) and the support rod (45) are fixedly mounted on the top of the support plate (11), and the support rod (45) is located on the left, right and rear sides of the support cylinder (47). The counterweight (48) is fitted and slidably connected in the support cylinder (47). The top of the support rod (45) and the support cylinder (47) are fixedly connected to the top of the top plate (41). The top of the top plate (41) is fixedly connected to the fixed pulley (43). The fixed pulley (43) rotates The movable connection is provided with a steel rope (42), the rear end of the steel rope (42) passes through the top plate (41) and is fixedly connected to the top of the counterweight (48), the front end of the steel rope (42) is fixedly connected to a sliding cylinder (46), the sliding cylinder (46) is fitted and slidably connected to the outer wall of the support cylinder (47) through a straight hole, the Y-axis moving component (3) is fixedly connected to the lower end of the front side wall of the sliding cylinder (46), the side wall of the sliding cylinder (46) is fixedly connected to a sliding block (49), the sliding block (49) is fitted and slidably connected to the Z-axis direction transmission rod (44) through a sliding hole, and the upper and lower ends of the Z-axis direction transmission rod (44) are fixedly connected to the bottom of the top plate (41) and the top of the support plate (11) respectively.

8. The large workpiece measuring and marking device according to claim 7, characterized in that: The sum of the weights of the Y-axis moving assembly (3), the measuring probe (5), the sliding cylinder (46) and the sliding block (49) is the same as the weight of the counterweight (48).

9. The large workpiece measuring and marking device according to claim 8, characterized in that: The sliding friction force between the sliding cylinder (46) and the supporting cylinder (47) is greater than the sliding friction force between the counterweight (48) and the supporting cylinder (47).

10. The large workpiece measuring and marking device according to claim 9, characterized in that: The Y-axis moving assembly (3) comprises a Y-axis direction transmission light rod (31), a polygonal rod (32), a fixing member (33), a second gripping rod (34), a rotating wheel (35) and a support frame (36). The support frame (36) is fixedly mounted on the lower end of the front side wall of the sliding cylinder (46). The sliding cylinder (46) is symmetrically mounted and rotatably connected with the rotating wheel (35) on the left and right sides and up and down. The polygonal rod (32) is movably connected between the rotating wheels (35). The Y-axis direction transmission light rod (31) is mounted in a groove provided on the side wall of the polygonal rod (32). The bottom of the support frame (36) is fixedly connected with the second gripping rod (34). The side wall of the support frame (36) is movably connected with the fixing member (33). The inner end of the fixing member (33) is in contact with the side wall of the polygonal rod (32). The measuring probe (5) is fixedly mounted on one end of the polygonal rod (32).

Images