A span rod for detecting parallelism of a split machine bed base

Abstract

The application discloses a span pole for detecting parallelism of a split machine tool base, which comprises a mirror seat, a mounting pedestal connected to the mirror seat through support rods, a magnetic attraction assembly arranged in the mounting pedestal, the magnetic attraction assembly comprising a U-shaped copper seat, a first suction seat, a second suction seat and a spacer, a magnetic part arranged on the U-shaped copper seat, and a rolling ball arranged at the end of the U-shaped copper seat. The span pole is provided with the support rods arranged on both sides of the mirror seat and the mounting pedestal arranged on two guide rails to complete stable support of the mirror seat, so that the problem that traditional span poles are vertically reciprocatingly shaken due to unbalanced support of the mirror seat and interfere with measurement data accuracy is avoided. In addition, the rolling ball under the U-shaped copper seat exists, so that the supporting end of the span pole not fixedly adsorbed with the slide plate of the guide rail two will not be deformed by tension due to sliding of the slide plate of the guide rail one, and in turn, parallelism data detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of split machine tool, in particular to a span rod for detecting parallelism of split machine tool base. BACKGROUND

[0002] The existing split machine tool has large gantry machine tool, due to the machining range and size required by the machine tool is large, the two guide rails of the gantry machine tool are often split, that is, the two guide rails are installed separately and are not connected with each other, but in order to ensure the machining accuracy of the machine tool, it is often necessary to detect and correct the parallelism of the split guide rail.

[0003] In the prior art, for large gantry machine tool, laser interferometer b is often used in cooperation with span rod d to measure the parallelism of guide rail a with high precision, lens seat e is installed on span rod d, and laser interferometer b and mirror c are arranged between two guide rails a, so that the laser emitted by laser interferometer b is approximately parallel to guide rail a, step one: install span rod d on the slide plate a1 of a guide rail a, and make the laser emitted by laser interferometer b pass through lens seat e and irradiate on mirror c to obtain a slope angle P1, and make the slide plate a1 on the guide rail a drive the span rod to slide to measure the slope angle P1 of multiple points; step two: install span rod d on the slide plate a1 of the other guide rail a, and make the laser emitted by laser interferometer b pass through lens seat e and irradiate on mirror c to obtain a slope angle P2, and make the slide plate a1 on the guide rail a drive the span rod to slide to measure the slope angle P2 of multiple points, that is, the parallelism between the two guide rails a = P1-P2, and the parallelism measured by multiple sets of data is compared and valued.

[0004] In the prior art including the above-mentioned patent, one end of the span rod is installed on the slide plate of the guide rail, and the other end is installed with the lens seat, since one end of the span rod lens seat extends to the outside without support and fixation, when the span rod follows the slide plate and slides on the guide rail, the span rod is easy to shake during movement, which causes the lens seat to reciprocate vertically, and further causes the vertical shaking of the lens seat, resulting in measurement error. SUMMARY

[0005] The purpose of the present application is to provide a span rod for detecting the parallelism of the split machine tool base, which solves the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a span marker for detecting the parallelism of a split-type machine tool base, comprising a mirror base, on which mounting bases are symmetrically connected via support rods. A magnetic suction assembly is disposed within the mounting base. The magnetic suction assembly includes a U-shaped copper base, a first suction base, a second suction base, and an isolating component separating the first and second suction bases. A magnetic element is disposed on the U-shaped copper base, and a ball bearing is disposed at the end of the U-shaped copper base. The U-shaped copper base is vertically slidably assembled for switching between the following two workstations:

[0007] In the magnetic suction station, the end of the U-shaped copper base is located inside the mounting base, and the two ends of the magnetic poles of the magnetic component abut against the first suction base and the second suction base respectively.

[0008] In the closed workstation, the end of the U-shaped copper base passes through the No. 1 suction base to extend out of the outside of the mounting base, and both ends of the magnetic poles of the magnetic component abut against the No. 1 suction base.

[0009] Preferably, the first end of the support rod is rotatably disposed within the mounting base, and a transmission rod for driving the first end of the support rod to rotate is disposed within the mounting base. The second ends of both support rods are synchronously rotatably disposed on the lens seat, and the transmission rod is driven to rotate so that the support rod rotates into a V-shape and abuts against the lens seat.

[0010] Preferably, the system also includes a drive assembly mounted on a mounting base. The drive assembly includes a coaxially arranged drive rod, a threaded rod, and an outer rod. The threaded rod rotates synchronously with the drive rod and is threadedly engaged with a U-shaped copper seat. The outer rod is rotatably mounted on the drive rod and has a drive gear ring. The drive rod is axially slidably mounted on the threaded rod to switch between two workstations.

[0011] In the first station, the drive rod moves away from the threaded rod, and the outer sleeve slides with the drive rod so that the drive gear ring is coupled with the transmission teeth set on the transmission rod;

[0012] In the second station, the drive rod approaches the threaded rod, and the drive gear ring separates from the transmission gear.

[0013] Preferably, the transmission rod is provided with a worm gear portion, and the first end of the support rod is provided with a worm wheel portion coupled to the worm gear portion.

[0014] Preferably, the U-shaped copper base is symmetrically provided with movable blocks, and the movable blocks are linearly arranged with arc-shaped springs. The end of the U-shaped copper base is located in the extension groove of the first suction seat, and the springs are curved in an arc towards the opening end of the extension groove, and the end of the springs abuts against the inner wall of the extension groove.

[0015] Preferably, the movable block is vertically slidably arranged on the U-shaped copper base, and the elastic elements on both sides of the movable block are clamped in the U-shaped copper base. The U-shaped copper base is located in the magnetic suction position so that the springs on the movable block abut against the worm grooves of the worm gear.

[0016] Preferably, a follower seat is axially slidably disposed on the transmission rod, the follower seat and the drive rod move vertically in sync, the drive rod is located at the first position so that the follower seat and the transmission rod respectively abut against the two sides of the drive gear ring, and the drive rod is located at the second position so that the flexible contact member disposed on the follower seat abuts against the locking worm gear.

[0017] Preferably, the U-shaped copper base is provided with an abutment portion, and the U-shaped copper base is located at the magnetic attraction position so that the abutment portion and the drive rod clamp the follower seat to form radial support for the transmission rod.

[0018] Preferably, the outer rod is provided with a ring-shaped connecting ring, and the follower seat is provided with an arc-shaped connecting groove. The connecting ring is slidably disposed in the connecting groove so that the follower seat and the outer rod move vertically in sync.

[0019] Preferably, each of the second ends of the support rod is provided with fan-shaped and mutually coupled synchronization teeth.

[0020] In the above technical solution, the present invention provides a span gauge for detecting the parallelism of a split machine tool base, which has the following beneficial effects: The support rods and mounting bases on both sides of the mirror base are respectively set on two guide rails to achieve stable support for the mirror base, avoiding the problem of vertical reciprocating shaking that interferes with the accuracy of measurement data caused by the unbalanced support of the mirror base in traditional span gauges. Secondly, the presence of the ball bearings under the U-shaped copper base ensures that the supporting end of the span gauge that is not fixed to the sliding plate of guide rail two will not be subjected to tensile deformation due to sliding with the sliding plate of guide rail one, thereby improving the accuracy of parallelism data detection. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0024] Figure 3This is a schematic cross-sectional view of the overall structure provided for an embodiment of the present invention;

[0025] Figure 4 A schematic cross-sectional view of the overall pedestal provided for an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the magnetic suction assembly, driving assembly, and transmission rod structure provided in an embodiment of the present invention;

[0027] Figure 6 This is an exploded structural diagram of the magnetic attraction component provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the U-shaped copper base and the movable block provided in an embodiment of the present invention;

[0029] Figure 8 This is an exploded structural diagram of the driving component provided in an embodiment of the present invention;

[0030] Figure 9 An exploded structural diagram of the drive assembly, transmission rod, and follower seat provided in an embodiment of the present invention;

[0031] Figure 10 Provided for embodiments of the present invention Figure 4 A magnified view of a portion of point A in the middle;

[0032] Figure 11 Provided for embodiments of the present invention Figure 4 A magnified view of a portion of point B in the middle;

[0033] Figure 12 A schematic diagram of a support rod with a V-shaped upward protrusion supporting the mirror mount provided in an embodiment of the present invention;

[0034] Figure 13 A schematic diagram illustrating the parallelism detection process for guide rails in existing technologies.

[0035] Figure 14 This is a schematic diagram illustrating the parallelism testing process for guide rails in existing technologies.

[0036] Explanation of reference numerals in the accompanying drawings of this invention:

[0037] 1. Lens mount; 11. Lens; 12. Locking bolt; 2. Support rod; 21. Synchronizing gear; 22. Worm gear; 3. Mounting platform; 4. Magnetic suction assembly; 41. First suction base; 411. Extension slot; 42. Second suction base; 43. Isolator; 44. U-shaped copper base; 441. Contact part; 45. Magnetic component; 46. Ball; 5. Drive assembly; 51. Drive rod; 511. Extension part; 512. Sliding part; 52. Threaded rod; 53. Outer rod; 531. Drive gear ring; 532. Connecting ring; 533. Collar part; 6. Movable block; 61. Spring; 62. Movable part; 7. Transmission rod; 71. Transmission gear; 72. Worm gear; 721. Worm groove; 8. Follower seat; 81. Flexible contact component; 82. Connecting groove; 91. Elastic component.

[0038] Explanation of reference numerals in prior art drawings:

[0039] a. Guide rail; a1. Slide plate; b. Laser interferometer; c. Reflector; d. Span marker; e. Lens mount; P1. First angle of inclination; P2. Second angle of inclination. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0041] like Figures 1-12 As shown, a span gauge for detecting the parallelism of a split machine tool base includes a mirror base 1, on which a mounting base 3 is symmetrically connected via a support rod 2. A magnetic suction assembly 4 is disposed within the mounting base 3. The magnetic suction assembly 4 includes a U-shaped copper base 44, a first suction base 41, a second suction base 42, and a separator 43 separating the first suction base 41 and the second suction base 42. A magnetic element 45 is disposed on the U-shaped copper base 44, and a ball bearing 46 is disposed at the end of the U-shaped copper base 44. The U-shaped copper base 44 is vertically slidably assembled for switching between the following two workstations:

[0042] In the magnetic suction station, the end of the U-shaped copper base 44 is located inside the mounting base 3, and the two ends of the magnetic poles of the magnetic component 45 respectively abut against the first suction base 41 and the second suction base 42.

[0043] In the closed position, the end of the U-shaped copper base 44 passes through the first suction base 41 to extend out of the outside of the mounting base 3, and both ends of the magnetic pole of the magnetic component 45 abut against the first suction base 41.

[0044] Specifically, such as Figure 1As shown, a lens 11 is mounted on the lens mount 1. Mounting pedestals 3 are mounted on both sides of the lens mount 1 via support rods 2. The lens mount 1, support rods 2, and mounting pedestals 3 together form a span marker. A magnetic assembly 4 is also installed inside the mounting pedestal 3. Figure 2 As shown, the first suction base 41, the second suction base 42, and the spacer 43 of the magnetic suction assembly 4 are all exposed on the bottom surface of the mounting base 3, and as... Figure 4 As shown, the U-shaped copper base 44 is vertically slidably disposed inside the mounting base 3, and a magnetic element 45 is provided on the U-shaped copper base 44, while the isolation element 43 completely separates the first suction base 41 and the second suction base 42 to prevent the first suction base 41 and the second suction base 42 from contacting each other.

[0045] When the U-shaped copper base 44 is driven to slide vertically upward to switch to the magnetic suction position, as follows: Figure 4 As shown, the two ends of the magnetic element 45 on the U-shaped copper base 44 abut against the first suction base 41 and the second suction base 42 respectively. The first suction base 41 is separated from the second suction base 42 by the separator 43, so that the magnetic field lines on the magnetic element 45, the first suction base 41 and the second suction base 42 are not closed. Therefore, the mounting base 3 can be attracted and fixed to the slide plate of the guide rail by the magnetic element 45, the first suction base 41 and the second suction base 42, thus completing the fixed installation of the mirror base 1 and the slide plate. If the U-shaped copper base 44 is driven vertically... When the U-shaped copper base 44 slides down to switch to the closed position, the magnetic component 45 slides into the first suction base 41 during the sliding process, and both ends of the magnetic component 45 abut against the first suction base 41, so that the magnetic field lines of the magnetic component 45 are closed. As a result, the magnetic attraction force of the magnetic suction assembly 4 disappears and is no longer attracted and fixed on the slide plate. During the sliding down process of the U-shaped copper base 44, the end of the U-shaped copper base 44 extends out of the outside of the first suction base 41 so that the ball 46 extends to the outside of the mounting base 3.

[0046] Therefore, when measuring the parallelism of the two guide rails, the U-shaped copper seat 44 in the mounting base 3 on one side is switched to the magnetic suction position so that the mounting base 3 is fixedly installed on the slide plate of guide rail one; while the U-shaped copper seat 44 in the mounting base 3 on the other side is switched to the closed position so that the mounting base 3 on this side is not attracted and fixed to the slide plate of guide rail two, and the ball 46 at the end of the U-shaped copper seat 44 abuts against the top of the slide plate of guide rail two to maintain mobility. Then, the slide plates on guide rail one and guide rail two can be moved simultaneously so that the span gauge rod as a whole drives the mirror base 1 to move, and the specific data can be measured by a laser interferometer and a reflector.

[0047] The mirror base 1 is vertically supported on both sides by two mounting bases 3 and support rods 2. Both sides of the mirror base 1 are supported and will not vibrate vertically. Furthermore, due to the presence of the ball 46 under the U-shaped copper base 44, the supporting end of the span marker that is not fixed to the slide plate of the guide rail 2 will not be subjected to tensile deformation due to sliding with the slide plate of the guide rail 1, thereby improving the accuracy of parallelism data detection.

[0048] Furthermore, since the U-shaped copper base 44 can slide vertically so that its end extends out of the outside of the mounting base 3, the magnetic component 45 and the U-shaped copper base 44 can be detachably connected. Thus, when the U-shaped copper base 44 continues to slide vertically down and extend out of the outside of the mounting base 3, the magnetic component 45 can move out of the outside of the mounting base 3 to complete the disassembly and replacement of the magnetic component 45, which facilitates the actual use of the span marker.

[0049] In the above technical solution, the support rods 2 and the mounting base 3 on both sides of the mirror base 1 are respectively set on two guide rails to complete the stable support of the mirror base 1. This avoids the problem of vertical reciprocating shaking caused by the unbalanced support of the mirror base 1 in traditional span markers, which interferes with the accuracy of measurement data. Secondly, the presence of the ball 46 under the U-shaped copper base 44 ensures that the support end of the span marker that is not fixed to the sliding plate of the second guide rail will not be subjected to tensile deformation due to sliding with the sliding plate of the first guide rail, thereby improving the accuracy of parallelism data detection.

[0050] As another embodiment of the present invention, the first end of the support rod 2 is rotatably disposed in the mounting base 3, and the mounting base 3 is provided with a transmission rod 7 for driving the first end of the support rod 2 to rotate. The second ends of the two support rods 2 are synchronously rotatably disposed on the lens seat 1. The transmission rod 7 is driven to rotate so that the support rod 2 rotates to form a V-shape and abuts against the lens seat 1.

[0051] Specifically, such as Figure 3 As shown, the end of the support rod 2 closest to the mounting base 3 is the first end, and the end closest to the mirror base 1 is the second end. The first end of the support rod 2 is rotatably mounted inside the mounting base 3, and the second end is rotatably mounted inside the mirror base 1. The second ends of the support rod 2 rotate synchronously on the mirror base 1. The two support rods 2 can be driven to rotate synchronously via the transmission rod 7, thereby changing the distance between the two mounting bases 3. This allows the span gauge to measure the parallelism of guide rails with different spacings, improving the applicability of the span gauge. Furthermore, because the support rods 2 can rotate synchronously, the two support rods 2... Figure 12The V-shaped protrusion forms a support for the lens mount 1, thus avoiding the problem in traditional installation methods where, when the lens mount 1 and the mounting platform 3 are horizontally aligned, the lens mount 1 is pressed down by gravity in the middle between the mounting platform 3, causing downward bending of the lens 11 and resulting in slight deformation of the lens 11, which leads to changes in the laser beam refraction data. This further improves the accuracy of the measurement data.

[0052] The ends of the two support rods 2 can be driven by multiple gears to achieve synchronous rotation, or by a synchronous belt and a synchronous pulley, or by other mechanisms known to those skilled in the art that can drive the support rods 2 to rotate synchronously.

[0053] Secondly, the transmission rod 7 can drive the support rod 2 to rotate through gear coupling, or through a timing belt, or other mechanisms known to those skilled in the art.

[0054] Furthermore, each of the second ends of the support rod 2 is provided with fan-shaped and mutually coupled synchronous teeth 21, that is, the synchronous teeth 21 at the second end of the support rod 2 are mutually coupled, thereby enabling the second end of the support rod 2 to rotate synchronously and improve the support stability of the mirror base 1.

[0055] Furthermore, a locking bolt 12 can be threaded onto the mirror base 1. When the support rod 2 is adjusted, the locking bolt 12 can be rotated to make it abut against the second end of the support rod 2, thereby further locking and fixing the support rod 2 and improving the support stability of the mirror base 1.

[0056] As another embodiment of the present invention, it further includes a drive assembly 5 disposed on the mounting base 3. The drive assembly 5 includes a drive rod 51, a threaded rod 52, and an outer rod 53 arranged coaxially. The threaded rod 52 is synchronously rotated with the drive rod 51 and is threadedly engaged with the U-shaped copper seat 44. The outer rod 53 is rotatably disposed on the drive rod 51 and is provided with a drive gear ring 531. The drive rod 51 is axially slidably mounted on the threaded rod 52 to switch between two workstations.

[0057] In the first station, the drive rod 51 moves away from the threaded rod 52, and the outer sleeve rod 53 slides with the drive rod 51 so that the drive gear ring 531 is coupled with the transmission teeth 71 provided on the transmission rod 7.

[0058] In the second station, the drive rod 51 approaches the threaded rod 52, and the drive gear ring 531 separates from the transmission gear 71.

[0059] Specifically, such as Figure 4As shown, the threaded rod 52 is rotatably mounted inside the mounting base 3, and the U-shaped copper seat 44 cooperates with the threaded rod 52. The drive rod 51 is axially slidably mounted on the threaded rod 52, and the drive rod 51 and the threaded rod 52 maintain axial synchronous movement. The protrusion 511 on the drive rod 51 and the collar 533 of the outer sleeve rod 53 both extend out of the top of the mounting base 3. The drive rod 51 can be driven to slide axially close to the threaded rod 52 through the protrusion 511 to switch to the second working position. At this time, the drive gear ring 531 separates from the transmission gear 71. Then, the drive rod 51 and the threaded rod 52 can be rotated through the protrusion 511, and the U-shaped copper seat 44 can be moved up and down through the drive rod 51 and the threaded rod 52 to switch the working position.

[0060] If the drive rod 51 slides away from the threaded rod 52 via the protrusion 511, the drive rod 51 switches to the first position, such as... Figure 4 As shown, the drive gear ring 531 on the outer sleeve rod 53 is coupled with the transmission gear 71 on the transmission rod 7. Then, by rotating the outer sleeve rod 53, the transmission rod 7 is driven to rotate, and the support rod 2 is driven to rotate through the transmission rod 7 to change the support angle, thereby completing the adjustment of the support angle of the mirror mount 1.

[0061] The drive rod 51 is used to switch positions to separate the adjustment drive methods of the support rod 2 and the magnetic assembly 4, thus facilitating practical use. Furthermore, when installing the mounting base 3, only the drive rod 51 and the outer rod 53 are needed; no additional installation tools are required, which improves the actual installation speed and ease of installation.

[0062] Furthermore, such as Figure 8 As shown, a square sliding part 512 is provided on the drive rod 51, and the sliding part 512 is axially slidably disposed in the groove opened in the threaded rod 52, so that the drive rod 51 and the threaded rod 52 can maintain axial sliding while maintaining axial synchronous rotation, thereby improving the sliding stability of the drive rod 51.

[0063] As another embodiment of the present invention, a worm gear portion 72 is provided on the transmission rod 7, and a worm wheel portion 22 coupled to the worm gear portion 72 is provided on the first end of the support rod 2.

[0064] Specifically, such as Figure 5As shown, the worm portion 72 of the transmission rod 7 is coupled to the worm wheel portion 22 provided on the support rod 2. When the transmission rod 7 is driven to rotate by the outer sleeve rod 53, the worm portion 72 drives the worm wheel portion 22 to rotate, thereby causing the support rod 2 to rotate and change the support angle. By utilizing the worm portion 72 and the worm wheel portion 22, the transmission stability between the transmission rod 7 and the support rod 2 can be improved. At the same time, when the transmission rod 7 is not being driven, the worm portion 72 and the worm wheel portion 22 can self-lock, so that the support rod 2 self-locks in the support position, improving the support stability and accuracy of the support rod 2, thereby further improving the data detection accuracy.

[0065] As another embodiment of the present invention, a movable block 6 is symmetrically arranged on the U-shaped copper base 44, and an arc-shaped spring 61 is linearly arranged on the movable block 6. The end of the U-shaped copper base 44 is located in the extension groove 411 of the first suction seat 41, and the spring 61 is curved in an arc towards the opening end of the extension groove 411, and the end of the spring 61 abuts against the inner wall of the extension groove 411.

[0066] Specifically, such as Figure 2 As shown, movable blocks 6 are provided on the left and right sides and the inner side of the U-shaped copper base 44, and an extension groove 411 is provided on the first suction base 41. The end of the U-shaped copper base 44 is located in the extension groove 411 and remains vertically movable. Several arc-shaped springs 61 are provided on the movable blocks 6, and the ends of the springs 61 face the opening end of the extension groove 411 and abut against the inner wall of the extension groove 411. Since the ends of the magnetic components 45 of all magnetic watch holders inevitably experience contact wear, the magnetic components 45 will generate particulate dust due to wear. In traditional magnetic watch holders, particulate dust will fall within the range of motion of the magnetic components 45, thus accelerating the wear and aging of the ends of the magnetic components 45.

[0067] When the threaded rod 52 rotates to switch the U-shaped copper seat 44 from the magnetic suction position to the closed position, the U-shaped copper seat 44 slides vertically downward so that the spring 61 moves downward to scrape the surfaces of the second suction seat 42, the isolator 43 and the first suction seat 41 that are in contact with the magnetic component 45. In turn, the scraping of the end of the spring 61 scrapes the particles and dust adhering in the protrusion groove 411 to the outside of the mounting base 3, so as to avoid the particles and dust from contacting the end of the magnetic component 45 and accelerating the wear of the magnetic component 45, thereby improving the service life of the magnetic suction assembly 4. Secondly, when the U-shaped copper seat 44 slides vertically downward, some of the spring 61 will block the opening of the protrusion groove 411, thereby preventing dust or moisture from entering the interior of the mounting base 3 and causing corrosion, further improving the service life of the magnetic suction assembly 4.

[0068] Secondly, when the threaded rod 52 rotates to switch the U-shaped copper seat 44 from the closed position to the magnetic suction position, the end of the spring 61 is inclined in an arc shape towards the opening end of the extension groove 411. The spring 61 can easily bend and enter the extension groove 411, and squeeze the particles and dust along the end of the spring 61 into the next spring 61 vertically downward. This further cleans and discharges the particles and dust inside the extension groove 411. Therefore, the downward-sloping spring 61 can squeeze and rub the particles and dust and gradually push them outward from the mounting base 3 during the repeated vertical sliding of the U-shaped copper seat 44. This avoids the problem of the particles generated in the mounting base 3 repeatedly rubbing against the magnetic component 45 and causing the magnetic component 45 to wear out faster.

[0069] As another embodiment of the present invention, the movable block 6 is vertically slidably arranged on the U-shaped copper base 44, and the elastic members 91 on both sides of the movable block 6 are clamped in the U-shaped copper base 44. The U-shaped copper base 44 is located in the magnetic suction position so that the springs 61 on the movable block 6 abut against the worm grooves 721 of the worm gear 72.

[0070] Specifically, such as Figure 11 As shown, the movable block 6 is vertically slidably mounted on the U-shaped copper base 44 via the movable part 62 on it. The elastic element 91 is symmetrically arranged on the U-shaped copper base 44, and the elastic element 91 is clamped at both ends of the movable part 62 to complete the elastic limit of the movable block 6. Since the spring 61 is installed on the movable block 6, when the U-shaped copper base 44 slides vertically to switch positions, the movable block 6 is pulled by the elastic element 91 on both sides of the vertical side. The friction generated by the spring 61 will cause the movable block 6 to slide vertically relative to the U-shaped copper base 44, thereby reducing the acceleration of the spring 61 in the process of following the vertical movement of the U-shaped copper base 44, and reducing the wear of the spring 61 on the first suction seat 41, the second suction seat 42 and the isolation element 43. In addition, the movable block 6 can also make the spring 61 extending out of the mounting base 3 abut against the outer end of the extension groove 411 of the first suction seat 41 through the elastic element 91 to form a tight shield, thereby further preventing the intrusion of water vapor and dust.

[0071] When the drive rod 51 is in the second position, it drives the threaded rod 52 to rotate. The rotation of the threaded rod 52 causes the U-shaped copper seat 44 to switch from the closed position to the magnetic suction position. Figure 10As shown, the movable block 6 moves vertically upwards following the U-shaped copper base 44, causing the spring 61 to enter and abut against the worm groove 721 of the worm gear 72. Then, the drive rod 51 slides axially to switch to the first position, coupling the outer sleeve rod 53 with the transmission rod 7. The outer sleeve rod 53 can drive the transmission rod 7 to rotate, thereby rotating the support rod 2 and changing the support angle. Due to the rotation of the transmission rod 7, the spring 61, located within the worm groove 721, scrapes along the rotation direction of the transmission rod 7. The movable block 6 is elastically limited by the elastic element 91, allowing the movable block 6 to continue moving as needed. The adaptive vertical sliding ensures that the spring 61 always follows the rotation of the worm gear 72 and remains within the worm groove 721. The adaptive vertical movement of the spring 61 scrapes away sludge or dust adhering to the worm groove 721 of the worm gear 72. With the repeated lifting and sliding of the U-shaped copper seat 44, the debris is discharged, preventing dust and debris from adhering to the coupling point between the worm wheel 22 and the worm gear 72, thus avoiding errors in the support angle of the support rod 2. This reduces the horizontal installation error between the lens 11 of the mirror mount 1 and the laser beam, further improving the accuracy of the measurement data.

[0072] As another embodiment of the present invention, a follower seat 8 is axially slidably provided on the transmission rod 7. The follower seat 8 moves vertically in sync with the drive rod 51. The drive rod 51 is located at the first working position so that the follower seat 8 and the transmission rod 7 respectively abut against the two sides of the drive gear ring 531. The drive rod 51 is located at the second working position so that the flexible contact member 81 provided on the follower seat 8 abuts against the locking worm gear part 22.

[0073] Specifically, such as Figure 5 As shown, the follower seat 8 is axially slidably mounted on the transmission rod 7, while the outer sleeve rod 53 is provided with an annular connecting ring 532. The follower seat 8 has an arc-shaped connecting groove 82, and the connecting ring 532 is slidably mounted in the connecting groove 82 so that the follower seat 8 and the outer sleeve rod 53 move vertically synchronously. The outer sleeve rod 53 is rotatably mounted on the drive rod 51 so that it moves vertically synchronously with the drive rod 51. The follower seat 8 moves vertically synchronously with the outer sleeve rod 53. Therefore, the follower seat 8 is located on the transmission rod 7 and moves vertically synchronously with the drive rod 51. When the drive rod 51 is driven to slide and switch to the first position to drive the support rod 2 to rotate and change the support angle through the transmission rod 7, the upper side of the drive gear ring 531 is coupled with the transmission teeth 71 of the transmission rod 7, and the follower seat 8 moves with the drive rod 51 and abuts against the lower side of the drive gear ring 531. This achieves the following seat 8 and the transmission rod 7 abutting against both sides of the drive gear ring 531, balancing the pressure on both sides of the drive gear ring 531 to avoid the problem of damage to the tooth surface caused by the drive gear ring 531 being subjected to force on one side, and improving the transmission stability.

[0074] When the drive rod 51 is driven to slide and switch to the second position, the angle adjustment of the support rod 2 is completed. The follower seat 8 moves vertically downward with the drive rod 51 so that the flexible contact 81 on the follower seat 8 abuts against the worm gear part 22. Then, the follower seat 8 and the flexible contact 81 further lock and fix the support rod 2 and buffer it, thereby improving the support stability of the support rod 2.

[0075] As another embodiment of the present invention, the U-shaped copper base 44 is provided with an abutment portion 441. The U-shaped copper base 44 is located in the magnetic suction position so that the abutment portion 441 and the drive rod 51 clamp the follower seat 8 to form radial support for the transmission rod 7.

[0076] Specifically, such as Figure 7 As shown, a contact part 441 is provided on the U-shaped copper base 44. After the support angle of the support rod 2 is adjusted, the drive rod 51 is positioned in the first station and drives the threaded rod 52 to rotate, switching the U-shaped copper base 44 to the magnetic suction station. This causes the U-shaped copper base 44 to slide vertically upward, and the contact part 441 abuts against the lower side of the follower seat 8. Consequently, the contact part 441 and the drive rod 51 are clamped on both sides of the follower seat 8. At this time, the follower seat 8 is clamped and locked. Since the follower seat 8 is axially slidably set on the transmission rod 7, the U-shaped copper base 44 locks and limits the follower seat 8 to provide radial support force for the transmission rod 7. This avoids the problem of radial skew of the transmission rod 7 caused by the pressure of the support rod 2 and the mirror base 1 during the movement of the span marker along the guide rail slide, which would lead to the external offset of the mirror base 1. This further improves the measurement accuracy of the data.

[0077] Working principle: First, a laser interferometer is set up between guide rail one and guide rail two, and the laser beam is roughly parallel to the guide rail. The drive rod 51 of the mounting base 3 at one end of the span marker slides to the second position. At this time, the drive rod 51 is rotated to switch the U-shaped copper seat 44 to the magnetic position. At this time, the mounting base 3 at this end is attached to the slide plate of guide rail one. The mounting base 3 at the other end of the span marker switches the U-shaped copper seat 44 to the closed position through the drive rod 51, and the ball bearings on the U-shaped copper seat 44 roughly abut against the slide plate of guide rail two.

[0078] Then, the drive rod 51 is switched to the first position, and the outer sleeve rod 53 is rotated to change the support angle of the support rod 2 against the lens mount 1 through the transmission rod 7, so that the middle part of the lens 11 is roughly aligned with the laser beam. Then, the drive rod 51 is rotated again to make the U-shaped copper seat 44 move vertically upward. Then, the drive rod 51 is switched to the second position again so that the U-shaped copper seat 44 and the drive rod 51 clamp the follower seat 8 to achieve radial support for the transmission rod 7.

[0079] Then, by synchronously sliding the slide plates of guide rail one and guide rail two, and using a laser beam to pass through lens 11 and irradiate the reflector c to obtain the first inclination angle P1, the above steps are repeated to attach one end of the span marker to the slide plate of guide rail two and the other end to the slide plate of guide rail one. The operation is repeated to obtain the second inclination angle P2, and the parallelism between the two guide rails a can be obtained as P1-P2.

[0080] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A span rod for detecting parallelism of a split machine bed base, characterized by, The utility model provides a lens holder, which comprises a mirror seat, a mounting pedestal symmetrically connected to the mirror seat through support rods, a magnetic attraction assembly arranged in the mounting pedestal, the magnetic attraction assembly comprising a U-shaped copper base, a first suction base, a second suction base and a partitioning piece for separating the first suction base from the second suction base, a magnetic piece arranged on the U-shaped copper base, a rolling ball arranged at the end of the U-shaped copper base, and the U-shaped copper base vertically slidingly arranged for switching between the following two stations: a magnetic attraction station, the end of the U-shaped copper base located in the mounting pedestal, and the two ends of the magnetic pole of the magnetic piece respectively abutting against the first suction base and the second suction base; a closing station, the end of the U-shaped copper base penetrating through the first suction base to extend outside the mounting pedestal, and the two ends of the magnetic pole of the magnetic piece both abutting against the first suction base; the first end of the support rod rotationally arranged in the mounting pedestal, a transmission rod arranged in the mounting pedestal for driving the first end of the support rod to rotate, the second end of each of the two support rods synchronously rotationally arranged on the lens seat, the transmission rod driven to rotate to make the support rods rotate to form a V shape and protrude to support the lens seat; a driving assembly arranged on the mounting pedestal, the driving assembly comprising a driving rod, a threaded rod and an outer sleeve rod arranged coaxially, the threaded rod synchronously rotationally arranged with the driving rod and threadedly matched with the U-shaped copper base, the outer sleeve rod rotationally arranged on the driving rod and provided with a driving gear ring, wherein the driving rod axially slidingly arranged on the threaded rod to be located between the two stations for switching: a first station, the driving rod away from the threaded rod, and the outer sleeve rod sliding with the driving rod to make the driving gear ring coupled with a transmission gear arranged on the transmission rod; a second station, the driving rod close to the threaded rod, and the driving gear ring separated from the transmission gear.

2. A span rod for detecting parallelism of a split machine bed base according to claim 1, wherein The transmission rod is provided with a worm part, and the first end of the support rod is provided with a worm wheel part coupled with the worm part.

3. A span rod for detecting parallelism of a split machine bed base according to claim 2, wherein The U-shaped copper base is symmetrically provided with a movable block, the movable block is linearly arranged with spring leaves in an array, the end of the U-shaped copper base is located in a protruding groove of the first suction base, the spring leaves are curved in an arc shape towards the opening end of the protruding groove, and the end of the spring leaves abuts against the inner wall of the protruding groove.

4. A span rod for detecting parallelism of a split machine bed base according to claim 3, wherein The movable block is vertically slidingly arranged on the U-shaped copper base, and the U-shaped copper base is clamped with elastic pieces vertically arranged on both sides of the movable block, the U-shaped copper base is located in the magnetic attraction station to make the spring leaves on the movable block abut against the worm grooves of the worm part respectively.

5. A span rod for detecting parallelism of a split machine bed base according to claim 4, wherein The transmission rod is axially slidingly provided with a following seat, the following seat vertically moves synchronously with the driving rod, the driving rod is located in the first station to make the following seat abut against both sides of the driving gear ring of the transmission rod, and the driving rod is located in the second station to make a flexible contact piece arranged on the following seat abut against and lock the worm wheel part.

6. A span rod for detecting parallelism of a split machine bed base according to claim 5, wherein The U-shaped copper base is provided with an abutting part, the U-shaped copper base is located in the magnetic attraction station to make the abutting part clamp the following seat of the driving rod to form radial support for the transmission rod.

7. A span rod for detecting parallelism of a split machine bed base according to claim 5, wherein The outer sleeve rod is provided with a connecting ring in the shape of a ring, the following seat is provided with an arc-shaped connecting groove, and the connecting ring is slidingly arranged in the connecting groove to make the following seat vertically move synchronously with the outer sleeve rod.

8. The span rod for detecting parallelism of a split machine bed base according to claim 1, wherein The second end of each of the support rods is provided with a synchronizing gear in the shape of a sector and coupled with each other.

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