Cross beam adjusting device and three-coordinate measuring machine

Abstract

The utility model discloses a cross beam adjusting device and a three-coordinate measuring machine, the cross beam adjusting device comprises a cross beam, and two ends of the cross beam are provided with connecting pieces; the connecting piece comprises a first embedded piece and a second embedded piece, a first screw is connected into the first embedded piece, and the first screw extends into and is connected into the second embedded piece; the longitudinal fixing piece comprises a second screw connected to the first step, a fixing block is fastened between the first step and the second embedded piece, and the second screw sequentially extends into and is connected to the fixing block and the second embedded piece; the longitudinal adjusting piece comprises a first external thread column connected to the second step, a third screw is connected into the first external thread column, and the third screw extends into and is connected into the second embedded piece; and the first external threaded column is rotated to drive the cross beam to move transversely, so that the verticality of the cross beam is adjusted. The crossbeam adjusting device can adjust the levelness and verticality of the crossbeam, so that the crossbeam is maintained in a horizontal state and a vertical state, and the measurement precision of the measuring machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to three -coordinate measuring machine technical field, specifically related to a beam adjusting device and three -coordinate measuring machine. BACKGROUND

[0002] As one of three -coordinate measuring machine core components, the deviation of the position of the beam directly influences the measuring precision of the measuring machine.

[0003] In the prior art, the two ends of the beam of the three -coordinate measuring machine are directly fixed on the corresponding stand, and cannot be adjusted vertically and horizontally. When the beam is installed, its axis cannot be kept absolutely horizontal and absolutely vertical, and there may be up and down deviation in the horizontal and vertical directions. Correspondingly, when the Z-axis slide carriage moves horizontally along the beam, the Z-axis slide carriage may have a certain displacement in the Z-axis direction, that is, the horizontal movement of the Z-axis slide carriage cannot be kept absolutely horizontal, thereby affecting the precision of the measuring machine.

[0004] Therefore, it is urgent to improve the existing beam installation structure so that the levelness and verticality of the beam can be adjusted when the beam is installed, so as to eliminate the possible deviation as much as possible and thereby ensure the measuring precision of the measuring machine. SUMMARY

[0005] The utility model discloses a kind of beam adjusting devices, the levelness and verticality of beam can be adjusted, so that beam maintains horizontal state and vertical state, improve the measuring precision of measuring machine.

[0006] To this end, the utility model provides a kind of beam adjusting device, including beam, its two ends are equipped with connecting piece;The connecting piece includes the first inner embedded piece and the second inner embedded piece of transverse arrangement, the first inner embedded piece is connected with the first screw, the first screw is connected into the second inner embedded piece;First stand and second stand, its top is equipped with first step and second step respectively, the first step and the second step are correspondingly arranged with the two ends of the beam respectively, for supporting the beam;Longitudinal fixing piece, it includes the second screw of being connected on the longitudinal step surface of the first step, the longitudinal step surface of the first step and the second inner embedded piece are tightly fastened with fixed block, the second screw is connected into the fixed block and the second inner embedded piece in sequence;Longitudinal adjusting piece, it includes the first external thread column of being connected on the longitudinal step surface of the second step, the first external thread column is connected with the third screw, the third screw is connected into the second inner embedded piece;Rotating the first external thread column makes it drive the horizontal movement of the beam, realizes the verticality adjustment of the beam.

[0007] Preferably, one side of the cross beam corresponding to the longitudinal step surface of the first step is defined as a first corresponding side, and the side of the cross beam opposite to the first corresponding side is defined as a first back side; the first inner insert recess is arranged on the first back side, and the second inner insert recess is arranged on the first corresponding side; the cross beam is provided with a connecting through hole communicating the first inner insert and the second inner insert.

[0008] Preferably, the first inner insert and the second inner insert are provided with coaxial threaded through holes, and the threaded through holes and the connecting through hole are coaxial.

[0009] Preferably, the first inner insert is provided with a countersunk hole, and the first screw is connected to the first inner insert from the countersunk hole.

[0010] Preferably, the end surface of the first external threaded column is formed with a first spherical socket part coaxial with the first external threaded column, a first convex spherical surface gasket is arranged between the first external threaded column and the second inner insert, and the first convex spherical surface gasket is in spherical surface cooperation with the first spherical socket part.

[0011] Preferably, the top of the first column is a hollow structure, one side of the first column opposite to the longitudinal step surface of the first step is provided with a first through hole, and the first through hole is coaxial with the second screw; the top of the second column is a hollow structure, one side of the second column opposite to the longitudinal step surface of the second step is provided with a second through hole, and the second through hole is coaxial with the third screw.

[0012] Preferably, the device further comprises a transverse fixing part, the transverse fixing part comprises a fourth screw connected to the transverse step surface of the first step, and the fourth screw is connected to the bottom of the cross beam.

[0013] Preferably, the device further comprises a transverse adjusting part, the transverse adjusting part comprises a second external threaded column connected to the transverse step surface of the second step, and the second external threaded column is connected with a fifth screw, and the fifth screw is connected to the bottom of the cross beam.

[0014] Preferably, the device further comprises a locking part, the locking part comprises a locking block arranged on the transverse step surface of the second step and a locking column arranged on the bottom of the cross beam, and the locking column is matched in the locking block; the locking block is connected with two symmetrically arranged locking bolts, and the locking bolts abut against the locking column.

[0015] The utility model further provides a three coordinate measuring machine, including the cross beam adjusting device, the first column and the second column are arranged on the corresponding two sides of three coordinate measuring machine workbench.

[0016] Compared with the prior art, the beam adjusting device has the advantages and positive effects that

[0017] The beam adjusting device comprises a beam and a first stand column and a second stand column, wherein two longitudinal fixing members and a transverse fixing member are arranged between the first end of the beam and the first step, and one longitudinal adjusting member, one transverse adjusting member and one locking member are arranged between the second end of the beam and the second step.

[0018] The verticality of the beam can be adjusted through the two longitudinal fixing members and the longitudinal adjusting member, and the levelness of the beam can be adjusted through the transverse fixing member and the transverse adjusting member; after the beam is adjusted to the vertical state and the horizontal state, the beam is locked and fixed on the first stand column and the second stand column through the longitudinal fixing member, the transverse fixing member and the locking member.

[0019] The locking member is arranged, so that the stability of the connection between the beam and the first stand column and the second stand column is improved, the long-term position stability of the beam is ensured, the beam can maintain the long-term stable and effective horizontal state and vertical state, the installation precision of the beam is improved, and therefore the long-term stable and effective operation of the measuring machine can be ensured.

[0020] Other characteristics and advantages of the present application will become more apparent after reading the specific embodiments of the present application in combination with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of one embodiment of the beam adjusting device of the present application;

[0022] Figure 2 is a structural schematic view of another embodiment of the beam adjusting device of the present application;

[0023] Figure 3 is Figure 2 is an enlarged view of part A in the figure;

[0024] Figure 4 is a structural schematic view of a third embodiment of the beam adjusting device of the present application;

[0025] Figure 5 is a structural schematic view of a fourth embodiment of the beam adjusting device of the present application;

[0026] Figure 6 is a structural schematic view of a fifth embodiment of the beam adjusting device of the present application;

[0027] Figure 7 is Figure 6 is an enlarged view of part B in the figure;

[0028] Figure 8is a structural schematic diagram of a sixth embodiment of the beam adjusting device of the utility model;

[0029] Figure 9 is a structural schematic diagram of a seventh embodiment of the beam adjusting device of the utility model;

[0030] Figure 10 is a structural schematic diagram of an eighth embodiment of the beam adjusting device of the utility model;

[0031] Figure 11 is a structural schematic diagram of a first inner insert and a second inner insert of the utility model;

[0032] Figure 12 is a structural schematic diagram of a first inner insert and a second inner insert of the utility model;

[0033] Figure 13 is a structural schematic diagram of a ninth embodiment of the beam adjusting device of the utility model.

[0034] Reference signs:

[0035] Beam 10, first corresponding surface 11, first back surface 12, locking column 13;

[0036] First inner insert 21, second inner insert 22, first screw 23;

[0037] First column 30, first step 31, first longitudinal step surface 311, first transverse step surface 312, second back surface 313, first through hole 314, first critical surface 315, third through hole 316, second screw 32, fixed block 33, fourth screw 34, second convex spherical surface washer 35;

[0038] Second column 40, second step 41, second longitudinal step surface 411, second transverse step surface 412, third back surface 413, second through hole 414, second critical surface 415, fourth through hole 416, first external thread column 42, third screw 43, second external thread column 44, fifth screw 45, third convex spherical surface washer 46, locking block 47, first locking groove 471, second locking groove 472, locking bolt 48, first convex spherical surface washer 49;

[0039] Workbench 50. DETAILED DESCRIPTION

[0040] In order to make the utility model's purpose, technical scheme and advantage more clear and obvious, the following will combine with the drawing and embodiment, make further detailed description to the utility model.

[0041] The utility model provides some embodiments of a kind of three coordinate measuring machines, specifically, it can be fixed bridge type three coordinate measuring machine, three coordinate measuring machine includes control unit, workstation 50, beam adjusting device and carriage etc.

[0042] Some embodiments of the utility model, beam adjusting device includes beam 10, first column 30 and second column 40, first column and 30 second column 40 are set in the corresponding two sides of the workstation 50 of three coordinate measuring machine, beam 10 is arranged along the X direction of three coordinate measuring machine, beam 10 is set between first column 30 and second column 40, carriage is slidably arranged on beam 10.

[0043] Some embodiments of the utility model, beam 10 is basically presented as cuboid, and the two ends of beam 10 along its length direction are first end and second end respectively. The top of first column 30 is equipped with first step 31, and the top of second column 40 is equipped with second step 41, and first step 31 and second step 41 are correspondingly set with the first end and the second end of beam 10 respectively, for supporting beam 10.

[0044] First step 31 includes first longitudinal step surface 311 and first transverse step surface 312, and second step 41 includes second longitudinal step surface 411 and second transverse step surface 412. First longitudinal step surface 311 and second longitudinal step surface 411 are located in the same vertical plane, and first transverse step surface 312 and second transverse step surface 412 are located in the same horizontal plane.

[0045] The opposite face of beam 10 with first longitudinal step surface 311 and second longitudinal step surface 411 is defined as first corresponding face 11, and the opposite face of beam 10 with first corresponding face 11 is defined as first back face 12.

[0046] The first end of beam 10 is equipped with two connecting pieces, and the second end of beam 10 is equipped with one connecting piece;Connecting piece includes first embedded part 21 and second embedded part 22 arranged transversely, first embedded part 21 is connected with first screw 23, and first screw 23 extends into second embedded part 22 from first embedded part 21. Through the connection of first screw 23 to second embedded part 22, second embedded part 22 can be stably and effectively connected in beam 10, effectively avoiding second embedded part 22 from separating from beam 10.

[0047] The first inner insert 21 and the second inner insert 22 are both in the shape of a cylinder, and the first inner insert 21 and the second inner insert 22 are both arranged transversely, the first inner insert 21 is recessed on the first back surface 12, and the outer surface of the first inner insert 21 is flush with the first back surface 12; the second inner insert 22 is recessed on the first corresponding surface 11, and the outer surface of the second inner insert 22 is flush with the first corresponding surface 11; the first inner insert 21 and the second inner insert 22 are spaced apart, and the transverse beam 10 is provided with a connecting through hole (not shown in the figure) which communicates the first inner insert 21 and the second inner insert 22.

[0048] The first inner insert 21 and the second inner insert 22 are provided with coaxial threaded through holes, the threaded through holes and the connecting through hole are coaxial, and the coaxial directions of the threaded through holes and the connecting through hole are perpendicular to the first corresponding surface 11 and the first back surface 12.

[0049] The transverse beam 10 is provided with a first inner insert groove and a second inner insert groove (not shown in the figure), the first inner insert groove is recessed on the first back surface 12, and the second inner insert groove is arranged on the first corresponding surface 11; the first inner insert 21 can be fixed in the first inner insert groove by adhesive bonding, and the second inner insert 22 can be fixed in the second inner insert groove by adhesive bonding, which is not limited in detail.

[0050] The first inner insert 21 is provided with a countersunk hole 24, and the first screw 23 extends into the first inner insert 21 from the countersunk hole 24. By arranging the countersunk hole 24, the rotational connection of the first screw 23 can be facilitated.

[0051] In some embodiments of the utility model, the transverse beam adjusting device further comprises two longitudinal fixing pieces, specifically, two longitudinal fixing pieces are arranged between the two connecting pieces of the first end of the transverse beam 10 and the first longitudinal step surface 311 of the first step 31, and the two longitudinal fixing pieces are used for fixing the transverse beam 10 in the longitudinal direction of the first step 31.

[0052] The longitudinal fixing piece comprises a second screw 32 connected to the first longitudinal step surface 311, a fixing block 33 tightly fixed between the first longitudinal step surface 311 and the second inner insert 22, and the second screw 32 extends into the fixing block 33 and the second inner insert 22 in sequence.

[0053] The fixing block 33 is in the shape of a cylinder, and the fixing block 33 is provided with a threaded through hole for threaded connection of the second screw 32. Both end faces of the fixing block 33 are finish machining surfaces, and the two end faces of the fixing block 33 are respectively in close contact with the first longitudinal step surface 311 and the second inner insert 22.

[0054] In some embodiments of the utility model, the transverse beam adjusting device further comprises a longitudinal adjusting piece, and the longitudinal adjusting piece is arranged between the connecting piece of the second end of the transverse beam 10 and the second longitudinal step surface 411 of the second step 41.

[0055] The longitudinal adjusting member comprises a first externally threaded column 42 connected to the second longitudinal stepped surface 411, the second longitudinal stepped surface 411 is provided with an internally threaded groove (not shown in the figure), the first externally threaded column 42 is screw fitted in the internally threaded groove; the first externally threaded column 42 is internally connected with a third screw 43, the third screw 43 is screw fitted with the first externally threaded column 42, and the third screw 43 extends into the second inner insert 22.

[0056] The end surface of the first externally threaded column 42 is formed with a first spherical socket portion (not shown in the figure) coaxial with the first externally threaded column 42, the first spherical socket portion is internally fitted with a first convex spherical surface washer 49, and the first convex spherical surface washer 49 is clamped between the first externally threaded column 42 and the second inner insert 22. The first convex spherical surface washer 49 is spherical surface fitted with the first spherical socket portion, can realize automatic compensation centering of the third screw 43 and the second inner insert 22, and improve the stability and connection accuracy of the connection between the third screw 43 and the second inner insert 22. The first convex spherical surface washer 49 is spherical surface fitted with the first spherical socket portion, has a larger contact area, can make the second inner insert 22 bear force more evenly and more reasonably, and has a more stable structure. In addition, by arranging the first convex spherical surface washer 49, the gap between the cross beam 10 and the first externally threaded column 42 can be effectively filled, which is beneficial to adjusting the gap between the cross beam 10 and the first externally threaded column 42, and helps to improve the accuracy of the verticality of the cross beam 10.

[0057] When adjusting, the second inner insert 22 is butted with the first convex spherical surface washer 49, the third screw 43 is rotated, and the third screw 43 is screwed into the second inner insert 22; at this time, the third screw 43 can still continue to rotate and is not locked; then the first externally threaded column 42 is rotated, the first externally threaded column 42 rotates while moving horizontally along the axial direction, so as to drive the cross beam 10 to horizontally deviate, that is, the verticality of the cross beam 10 can be adjusted. After the adjustment is completed, the third screw 43 is rotated again, the third screw 43 is locked, and the cross beam 10 can be kept in a vertical state.

[0058] Since the first screw 23 is connected into the second inner insert 22, the first screw 23 can exert a pulling force on the second inner insert 22, the pulling force exerted by the first screw 23 on the second inner insert 22 is opposite to the pulling force exerted by the third screw 43 on the second inner insert 22, which can effectively prevent the second inner insert 22 from being separated from the cross beam 10 by the pulling force of the third screw 43, so as to maintain a stable and effective vertical state of the cross beam 10.

[0059] The top of the first column 30 is a hollow structure, one side of the first column 30 opposite to the first longitudinal stepped surface 311 of the first stepped surface 31 is defined as a second back surface 313, the second back surface 313 is provided with a first perforation 314 coaxial with the second screw 32. Through the first perforation 314, the operator can conveniently rotate the second screw 32.

[0060] The top of the second column 40 is a cavity structure, and a side of the second column 40 opposite to the second longitudinal step surface 412 of the second step 41 is defined as a third back surface 413, and the third back surface 413 is provided with a second through hole 414 coaxial with the third screw 43. Through the second through hole 414, the first external thread column 42 and the third screw 43 can be conveniently rotated by an operator.

[0061] The beam adjusting device further comprises a transverse fixing member, and the transverse fixing member comprises a fourth screw 34 connected to the first transverse step surface 312 of the first step 31, and the fourth screw 34 extends into the bottom of the first end of the beam 10. Through the fourth screw 34, the first end of the beam 10 can be connected and fixed on the first step 31.

[0062] The first transverse step surface 312 is provided with a spherical recess groove (not shown in the figure), and the spherical recess groove is matched with a second convex spherical washer 35, the second convex spherical washer 35 is attached to the bottom surface of the beam 10 and is in abutment and resistance, and the fourth screw 34 passes through the second convex spherical washer 35 and is connected to the bottom of the beam 10. Through the setting of the second convex spherical washer 35, the automatic compensation centering of the first transverse step surface 312 and the bottom surface of the beam 10 can be realized, and the stability is improved. In addition, the second convex spherical washer 35 is matched with the spherical recess groove, the contact area is larger, the beam 10 can be more uniformly stressed and more reasonably stressed, and the structure is more stable.

[0063] The first step 30 is provided with a third through hole 316 on a side of the first step 30 critical to the first transverse step surface 312, perpendicular to the first transverse step surface 312 and parallel to the first longitudinal step surface 311, and the axis of the third through hole 316 is perpendicular to the fourth screw 34. Through the third through hole 315, the fourth screw 34 can be conveniently rotated by an operator.

[0064] The beam adjusting device further comprises a transverse adjusting member, and the transverse adjusting member comprises a second external thread column 44 connected to the second transverse step surface 412 of the second step 41, and the second external thread column 44 is connected with a fifth screw 45, and the fifth screw 45 extends into the bottom of the second end of the beam 10.

[0065] The end surface of the second external threaded column 44 is formed with a second ball socket portion coaxial with the second external threaded column 44, the third convex spherical washer 46 is matched with the inner spherical surface of the second ball socket portion, and the third convex spherical washer 46 is clamped between the second external threaded column 44 and the bottom surface of the cross beam 10. By arranging the third convex spherical washer 46, the automatic compensation centering of the second transverse stepped surface 412 and the bottom surface of the cross beam 10 can be realized, and the stability is improved. The third convex spherical washer 46 is matched with the spherical groove spherical surface, the contact area is larger, the cross beam 10 can be more uniformly stressed and more reasonably stressed, and the structure is more stable. In addition, by arranging the third convex spherical washer 46, the gap between the cross beam 10 and the second transverse stepped surface 412 can be effectively filled, which is beneficial to adjusting the gap between the cross beam 10 and the second transverse stepped surface 412, and helps to improve the accuracy of the levelness of the cross beam 10.

[0066] During adjustment, the bottom surface of the second end of the cross beam 10 is butted with the third convex spherical washer 46, the fifth screw 45 is rotated, and the fifth screw 45 is screwed into the bottom surface of the second end of the cross beam 10; at this time, the fifth screw 45 can still continue to rotate and is not locked; then the second external threaded column 44 is rotated, the second external threaded column 44 rotates and vertically moves along the axial direction at the same time, so that the cross beam 10 can be offset, that is, the levelness of the cross beam 10 can be adjusted. After the adjustment is completed, the fifth screw 45 is rotated again, the fifth screw 45 is locked, and the cross beam 10 can be kept in a horizontal state.

[0067] The face on the second stepped surface 41, which is adjacent to, perpendicular to and parallel to the second transverse stepped surface 412, is defined as a second critical surface 415, the fourth through hole 416 is arranged on the second critical surface 415, and the axial direction of the fourth through hole 416 is perpendicular to the fifth screw 45. Through the fourth through hole 416, the operator can conveniently rotate the fifth screw 45.

[0068] The cross beam adjusting device also comprises a locking member, the locking member comprises a locking block 47 arranged on the second transverse stepped surface 412 of the second stepped surface 41 and a locking column 13 arranged at the bottom of the cross beam 10, and the locking column 13 is matched in the locking block 47; the locking block 47 is connected with two symmetrically arranged locking bolts 48, and the locking bolts 48 abut against the locking column 13.

[0069] The locking block 47 is a cylindrical integral member, the second transverse stepped surface 412 is provided with a mounting hole (not shown in the figure), and the locking block 47 is fixedly installed in the mounting hole. The fixing mode can be adhesive fixing or other modes commonly used in the art, and is not specifically limited here.

[0070] The locking column 13 is vertically arranged at the bottom of the second end of the cross beam 10, and the locking column 13 can be integrally formed with the cross beam 10 or fixed at the bottom of the cross beam 10 by other modes, and is not specifically limited here.

[0071] The first locking groove 471 is provided in the locking block 47 along the axial direction of the locking block 47, and the opening of the first locking groove 471 faces the bottom of the cross beam 10. The locking column 13 at the bottom of the cross beam 10 is matched in the first locking groove 471. The matching mode can be gap matching, which is not specifically limited here.

[0072] The locking column 47 is further provided with two symmetrical second locking grooves 472, the axial directions of the two second locking grooves 472 are perpendicular to the axial direction of the first locking groove 471, and the two second locking grooves 472 are in communication with the first locking groove 471. The two second locking grooves 472 are internally threaded grooves, and the locking bolts 48 are connected in the two second locking grooves 472. By rotating the locking bolts 48, the end of the locking bolt 48 can be brought into abutment with the locking column 13, so that the locking column 13 can be locked and fixed, and the cross beam 10 can be locked and fixed on the second step 41.

[0073] By arranging the locking member, the stability of the connection between the cross beam 10 and the first column 30 and the second column 40 can be improved, the long-term position stability of the cross beam 10 can be ensured, the cross beam 10 can maintain a long-term stable and effective horizontal state and vertical state, the installation precision of the cross beam 10 can be improved, and thus the long-term stable and effective operation of the measuring machine can be ensured.

[0074] The cross beam adjusting device comprises the cross beam 10 and the first column 30 and the second column 40. Two longitudinal fixing members and one transverse fixing member are arranged between the first end of the cross beam 10 and the first step 31, and one longitudinal adjusting member, one transverse adjusting member and one locking member are arranged between the second end of the cross beam 10 and the second step 41.

[0075] The adjusting process of the cross beam adjusting device comprises:

[0076] The first end of the cross beam 10 is connected to the first longitudinal step face 311 of the first step 31 through the two longitudinal fixing members, and the first end of the cross beam 10 is not locked on the first step 31. The second end of the cross beam 10 is connected to the second longitudinal step face 411 of the second step 41 through the longitudinal adjusting member, and the verticality of the cross beam 10 is adjusted at the same time, so that the cross beam 10 is vertical. In the vertical direction, the cross beam 10 can be adjusted to the vertical state according to the principle of three-point determination of a plane through the two longitudinal fixing members and the longitudinal adjusting member.

[0077] The first end of the cross beam 10 is connected to the first transverse step face 311 of the first step 31 through the transverse fixing member, and the first end of the cross beam 10 is not locked on the first step 31. The second end of the cross beam 10 is connected to the second transverse step face 412 of the second step 41 through the transverse adjusting member, and the levelness of the cross beam 10 is adjusted at the same time, so that the cross beam 10 is horizontal.

[0078] After the horizontal beam 10 is adjusted to the vertical state and the horizontal state, the two longitudinal fixing members and the horizontal fixing member are locked.

[0079] Finally, the locking member is locked to ensure that the horizontal beam 10 can maintain a long-term stable and effective horizontal state and vertical state.

[0080] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for some of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. A cross member adjustment device, characterized by, The beam comprises a beam, both ends of which are provided with connecting pieces; the connecting pieces comprise transversely arranged first and second inner inserts, the first inner insert is connected with a first screw, and the first screw extends into the second inner insert; first and second vertical columns, the top of each of which is provided with a first and second step, respectively, which are arranged correspondingly with the two ends of the beam to support the beam; a longitudinal fixing piece, which comprises a second screw connected to the longitudinal step surface of the first step, and a fixing block is tightly fixed between the longitudinal step surface of the first step and the second inner insert, and the second screw extends into the fixing block and the second inner insert in turn; a longitudinal adjusting piece, which comprises a first external threaded column connected to the longitudinal step surface of the second step, the first external threaded column is connected with a third screw, and the third screw extends into the second inner insert; rotating the first external threaded column to drive the beam to move transversely, thereby adjusting the verticality of the beam.

2. The beam adjusting device according to claim 1, wherein one side of the beam corresponding to the longitudinal step surface of the first step is defined as a first corresponding side, and the other side of the beam opposite to the first corresponding side is defined as a first back side; the first inner insert is recessed on the first back side, the second inner insert is recessed on the first corresponding side, and the beam is provided with a connecting through hole communicating the first inner insert and the second inner insert.

3. The beam adjusting device according to claim 2, wherein the first and second inner inserts are provided with coaxial threaded through holes, and the threaded through holes and the connecting through hole are coaxial.

4. The beam adjusting device according to claim 1, wherein the first inner insert is provided with a countersunk hole, and the first screw extends into the first inner insert from the countersunk hole.

5. The beam adjusting device according to claim 1, wherein an end surface of the first external threaded column is formed with a first spherical socket part coaxial therewith, a first convex spherical surface gasket is arranged between the first external threaded column and the second inner insert, and the first convex spherical surface gasket is spherical matched with the first spherical socket part.

6. The beam adjusting device according to claim 1, wherein the top of the first vertical column is a hollow structure, one side of the first vertical column opposite to the longitudinal step surface of the first step is provided with a first through hole, and the first through hole is coaxial with the second screw; the top of the second vertical column is a hollow structure, one side of the second vertical column opposite to the longitudinal step surface of the second step is provided with a second through hole, and the second through hole is coaxial with the third screw.

7. The beam adjusting device according to claim 1, further comprising a transverse fixing piece, the transverse fixing piece comprises a fourth screw connected to the lateral step surface of the first step, and the fourth screw extends into the bottom of the beam.

8. The beam adjusting device according to claim 1, wherein ​ Further comprising a lateral adjusting member, which comprises a second external threaded column connected to the lateral stepped surface of the second step, and a fifth screw connected to the second external threaded column and extending into the bottom of the crossbeam.

9. The crossbeam adjusting device of claim 1, wherein, Further comprising a locking member, which comprises a locking block arranged on the lateral stepped surface of the second step, and a locking column arranged on the bottom of the crossbeam and fitted into the locking block; The locking block is connected with two symmetrically arranged locking bolts, which abut against the locking column.

10. A three-coordinate measuring machine, characterized in that The crossbeam adjusting device of any one of claims 1-9, wherein the first upright column and the second upright column are arranged on the corresponding two sides of the worktable of the three-coordinate measuring machine.

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