Cross beam assembly and bridge type three-coordinate measuring machine

Abstract

The invention discloses a cross beam assembly. A cross beam body is provided with a horizontally-arranged first plane. The cross beam adjustor is used for supporting the cross beam body and adjusting the height or the inclination angle of the cross beam body; the cross beam adjuster comprises a first seat body, a second seat body, a first screw, a first adjusting stud and a belleville spring; the first screw is used for connecting the cross beam body with the first adjusting stud, and the first adjusting stud is in abutting fit with the first plane; at the first section end of the cross beam body, a plurality of first screws in the Y direction are rigidly connected with the first seat body through first adjusting studs; at the second cross section end of the cross beam body, a plurality of first screws in the Y direction are elastically connected with a second seat body through a belleville spring and a first adjusting stud in sequence; at the second section end, at least one first screw close to the symmetry axis position of the multiple belleville springs is rigidly connected with the first base body through a first adjusting stud. On the premise that the precision requirements of all parts of the cross beam assembly are met, installation is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of three-coordinate measuring machines, and in particular to a crossbeam assembly and a bridge-type three-coordinate measuring machine. Background Art

[0002] In a bridge-type three-dimensional coordinate measuring machine, the crossbeam assembly is a crucial component, which mainly includes the base, crossbeam body, measuring head, support column and other parts. The accuracy of the crossbeam assembly directly affects the measurement accuracy of the measuring machine. Therefore, how to reduce the manufacturing and installation costs while ensuring the high accuracy of the crossbeam assembly is a major challenge facing the current technical field.

[0003] The beam body is usually made of high-strength materials to ensure that it has sufficient rigidity and stability during operation. However, the installation and fixation of the beam body and the support determine the stability and accuracy of the measuring head during movement.

[0004] In some prior art, in order to improve the stability of the connection between the beam body and the support, the mass of the beam is usually increased and a screw jack is used to increase the pressure between the beam body and the support to avoid micro displacement along the beam direction, thereby improving the measurement accuracy of the bridge-type three-dimensional coordinate measuring machine. However, the above solution will result in a large mass of the bridge-type three-dimensional coordinate measuring machine, and the huge mass of the beam is likely to cause a series of production and installation problems.

[0005] Therefore, how to simplify the installation and improve the fixing effect while ensuring the accuracy requirements of each part of the beam assembly is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] The object of the present invention is to provide a beam assembly and a bridge-type three-dimensional coordinate measuring machine, aiming to simplify installation and improve fixing effect while ensuring the accuracy requirements of various parts of the beam assembly, thereby improving measurement or application accuracy.

[0007] To achieve this object, the present invention adopts the following technical solutions: A crossbeam assembly comprises a crossbeam body arranged along an X direction, wherein the crossbeam body has a first plane arranged horizontally; The crossbeam assembly further includes a crossbeam adjuster for supporting the crossbeam body and adjusting the height or tilt angle of the crossbeam body; The crossbeam adjuster comprises a first seat body, a second seat body, a first screw, a first adjusting stud and a butterfly spring; the first screw is used to connect the crossbeam body and the first adjusting stud, and the first adjusting stud is in abutment with the first plane; At the first cross-sectional end of the beam body, a plurality of the first screws along the Y direction are rigidly connected to the first seat body through the first adjusting studs; At the second cross-sectional end of the beam body, a plurality of the first screws along the Y direction are elastically connected to the second seat body through the butterfly spring and the first adjusting stud in sequence; wherein, at the second cross-sectional end, at least one of the first screws close to the symmetry axis of the plurality of butterfly springs is rigidly connected to the first seat body through the first adjusting stud; When the upper end surface of the first adjusting stud abuts against the first plane, rotating the first adjusting stud can adjust the height and the tilt angle of the beam body relative to the first seat body or the second seat body.

[0008] In one embodiment of the present invention, the first screw located at the end of the second cross section and close to the symmetry axes of the plurality of butterfly springs is equidistant from at least two of the first screws located at the end of the first cross section.

[0009] In one embodiment of the present invention, the first cross-sectional position and the second cross-sectional position are symmetrical relative to the center of gravity of the beam body.

[0010] In one embodiment of the present invention, the first adjusting screw has an external screwing portion, a first internal thread and a first external thread; The first internal thread cooperates with the first screw thread; after the first external thread is threadedly connected with the first seat body and the second seat body, the external screwing part is arranged between the beam body and the first seat body or the second seat body, and the shape of the external screwing part is a hexagonal prism.

[0011] In one embodiment of the present invention, the first adjusting stud is further formed with a through hole and a glue injection hole, the through hole is located above the first internal thread; the glue injection hole penetrates the side wall of the first adjusting stud and is connected with the through hole; After the first screw is matched with the first internal thread, glue is injected from the glue injection hole into the through hole and the first internal thread.

[0012] In one embodiment of the present invention, the first adjusting stud is further provided with a first locking nut, the first locking nut cooperates with the first external thread, and the first locking nut is respectively glued and fixed to the first seat body and the second seat body.

[0013] In one embodiment of the present invention, the beam adjuster further comprises a first top block, a second top block, a second screw and a second adjustment stud; The first top block and the second top block are both fixedly connected to the first plane by the second screw. The first base body and the second base body are respectively formed with a first rectangular frame and a second rectangular frame; The second adjusting studs are respectively arranged through each side wall of the first rectangular frame, and are used for abutting and cooperating with the first top block in the X direction and the Y direction; The second adjusting studs are also respectively passed through a group of oppositely arranged side walls of the second rectangular frame, and are used for abutting and cooperating with the second top block in the X direction or the Y direction; When the second adjusting screw is in contact with the first top block or the second top block, rotating the second adjusting screw can be used to adjust the micro displacement of the beam body in the X direction or the Y direction.

[0014] In one embodiment of the present invention, the second adjusting stud is formed with a second external thread and a spherical groove; A spherical segment is arranged in the spherical groove, and the spherical segment is in abutment with the first top block or the second top block.

[0015] In one embodiment of the present invention, a lubricant is coated on a contact surface between the spherical segment and the first top block or the second top block.

[0016] In an embodiment of the present invention, the second adjusting screw is further formed with an inner screwing portion, the inner screwing portion is arranged away from the spherical groove, and the inner screwing portion is a hexagonal groove.

[0017] In one embodiment of the present invention, the second adjusting stud is further provided with a second locking nut, the second locking nut cooperates with the second external thread, and the second locking nut is respectively glued and fixed to the first rectangular frame and the second rectangular frame.

[0018] In one embodiment of the present invention, the cross section of the beam body is a quadrilateral, so that the beam body forms the first plane, the second plane, the third plane and the fourth plane which are adjacent to each other in sequence; The angles formed by the first plane, the second plane and the extended planes of the third plane are all acute angles; and the angle between the first plane and the extended plane of the third plane is 45°.

[0019] In one embodiment of the present invention, the included angle between the second plane and the extension plane of the third plane is θ1, and the included angle between the third plane and the fourth plane is θ2, wherein the value of θ1 is similar to the angle value of θ2.

[0020] In one embodiment of the present invention, θ1=θ2=60°.

[0021] In an embodiment of the present invention, the corners between the first plane and the second plane, the corners between the second plane and the third plane, and the corners between the third plane and the fourth plane are all chamfered.

[0022] The present invention also provides a bridge-type three-dimensional coordinate measuring machine, comprising a measuring machine body, a measuring head and a crossbeam assembly as described above; The measuring head is mounted on the beam body, and the first seat body and the second seat body are respectively fixedly connected to the measuring machine body.

[0023] Compared with the prior art, the present invention has the following beneficial effects: The technical solution of the present invention is that at the first cross-sectional end of the beam body, a plurality of the first screws along the Y direction are rigidly connected to the first seat body through the first adjusting studs, and at this position all the first screws are rigidly connected to the first adjusting studs.

[0024] At the second cross-sectional end of the beam body, multiple first screws along the Y direction are elastically connected to the second seat body in sequence through the butterfly spring and the first adjusting stud; wherein, at the second cross-sectional end, at least one first screw arranged on the axis of symmetry of multiple butterfly springs is rigidly connected to the first seat body through the first adjusting stud.

[0025] At this time, at the second cross-sectional end, the first screw passes through the butterfly spring and is elastically connected to the first adjusting stud; the first screw without the butterfly spring is rigidly connected to the first adjusting stud; the first screw that conforms to the rigid connection relationship is arranged at a symmetrical position of the positions of all the butterfly springs, so that when the beam body is twisted by external force, the butterfly spring can release part of the potential energy to make the beam body restore its balance relative to the first seat body or the second seat body after the external force is released, thereby minimizing the loosening of the first screw or the adjusting stud caused by the external force on the beam body, thereby improving the measurement accuracy of the measuring head running on the beam body.

[0026] Moreover, the provision of the first adjusting stud in the present solution simplifies the installation and adjustment process of the beam adjuster. Specifically, after the first screw, the first adjusting stud, and the first base or the second base are threadedly connected in sequence, the first adjusting component can be rotated on the periphery with a wrench to achieve fine-tuning of the inclination angle or height of the beam body, thereby improving the installation accuracy of the beam body.

[0027] Therefore, the setting of the beam assembly in the technical solution of the present invention improves the measurement accuracy of the beam assembly while simplifying the installation and adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0030] Figure 1 It is a structural schematic diagram of an embodiment of a crossbeam assembly of the present invention; Figure 2 for Figure 1 The main view; Figure 3 for Figure 1 Test chart of Figure 4 for Figure 2 AA section view in the figure; Figure 5 for Figure 2 BB section view in the figure; Figure 6 for Figure 2 CC section view in the figure; Figure 7 It is a partial structural schematic diagram of the beam adjuster of the present invention; Figure 8 It is a front view of an embodiment of the first adjusting stud of the present invention; Fig. 9 for Figure 8 EE section view in the figure; Fig.10 It is a structural schematic diagram of an embodiment of the first seat body of the present invention; Fig.11 for Figure 2 DD section view; Fig.12 It is a partial structural schematic diagram of the beam adjuster of the present invention; Fig.13 It is a front view of an embodiment of a second adjusting stud of the present invention; Fig.14 for Fig.13 FF section view; Fig.15It is a structural schematic diagram of an embodiment of the second seat body of the present invention; Fig.16 It is a structural schematic diagram of an embodiment of the first top block or the second top block of the present invention; Fig.17 It is a front view of an embodiment of a bridge-type three-dimensional coordinate measuring machine of the present invention; Fig.18 for Fig.17 Side view of.

[0031] Illustrations: 100, beam assembly; 110, beam body; 111, first plane; 112, second plane; 113, third plane; 114, fourth plane; 115, chamfer; AA, first section; BB, second section; 120, beam adjuster; 121-1, first seat body; 121a, first rectangular frame; 121-2, second seat body; 121b, second rectangular frame; 122. first screw; 123, first adjusting stud; 123a, external screwing portion; 123b, first internal thread; 123c, first external thread; 123d, through hole; 123e, glue injection hole; 124. butterfly spring; 125. first locking nut; 126-1, first top block; 126-2, second top block; 127, second screw; 128, second adjusting stud; 128a, second external thread; 128b, spherical groove; 128c, internal screwing portion; 128d, ball part; 129, second locking nut; 1000, Bridge type three-dimensional coordinate measuring machine; 200. Measuring head. DETAILED DESCRIPTION

[0032] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0034] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] The embodiment of the present invention provides a beam assembly 100 and a fixed bridge type three-dimensional coordinate measuring machine.

[0036] See also Figures 1 to 18 In one embodiment of the present invention, the beam assembly 100 comprises a beam body 110 arranged along the X direction, and the beam body 110 has a first plane 111 arranged horizontally; The crossbeam assembly 100 further includes a crossbeam adjuster 120 for supporting the crossbeam body 110 and adjusting the height or tilt angle of the crossbeam body 110; The crossbeam adjuster 120 includes a first seat body 121-1, a second seat body 121-2, a first screw 122, a first adjusting stud 123 and a butterfly spring 124; the first screw 122 is used to connect the crossbeam body 110 and the first adjusting stud 123, and the first adjusting stud 123 is in abutment with the first plane 111; At the first section AA end of the beam body 110 , a plurality of the first screws 122 along the Y direction are rigidly connected to the first seat body 121 - 1 through the first adjusting studs 123 ; At the end BB of the first section of the beam body 110, a plurality of the first screws 122 along the Y direction are elastically connected to the second seat body 121-2 in sequence through the butterfly spring 124 and the first adjusting stud 123; wherein, at the end BB of the first section, at least one of the first screws 122 close to the symmetry axis of the plurality of butterfly springs 124 is rigidly connected to the first seat body 121-1 through the first adjusting stud 123; When the upper end surface of the first adjusting screw 123 abuts against the first plane 111 , rotating the first adjusting screw 123 can adjust the height and tilt angle of the beam body 110 relative to the first seat body 121 - 1 or the second seat body 121 - 2 .

[0037] It can be understood that the technical solution of the present invention is that at the end of the first section AA of the beam body 110, a plurality of the first screws 122 along the Y direction are rigidly connected to the first seat body 121-1 through the first adjustment studs 123, such as Figure 4 As shown, at this position, all the first screws 122 are rigidly connected to the first adjusting studs 123 .

[0038] At the end of the first section BB of the beam body 110, a plurality of the first screws 122 along the Y direction are elastically connected to the second seat body 121-2 in sequence through the butterfly springs 124 and the first adjusting studs 123; wherein, at the end of the first section BB, at least one of the first screws 122 arranged on the symmetry axes of the plurality of butterfly springs 124 is rigidly connected to the first seat body 121-1 through the first adjusting studs 123; At this time, at the end of the first section BB, Figure 5 As shown, the first screw 122 is passed through the butterfly spring 124 and is elastically connected to the connecting position of the first adjusting stud 123; the first screw 122 without the butterfly spring 124 is rigidly connected to the first adjusting stud 123; the first screw 122 that meets the rigid connection relationship is arranged at a symmetrical position of the positions of all the butterfly springs 124, so that when the beam body 110 is twisted by external force, the butterfly spring 124 can release part of the potential energy to enable the beam body 110 to restore its balance relative to the first seat body 121-1 or the second seat body 121-2 after the external force is released, thereby minimizing the loosening of the first screw 122 or the adjusting stud caused by the external force on the beam body 110, thereby improving the measurement accuracy of the measuring head 200 running on the beam body 110.

[0039] Furthermore, the provision of the first adjustment stud 123 in this solution simplifies the installation and adjustment process of the beam adjuster 120. Specifically, after the first screw 122, the first adjustment stud 123, and the first base or the second base are threadedly connected in sequence, the first adjustment component can be rotated at the periphery with a wrench to achieve fine adjustment of the tilt angle or height of the beam body 110, thereby improving the installation accuracy of the beam body 110.

[0040] Therefore, the setting of the beam assembly 100 in the technical solution of the present invention improves the measurement accuracy of the beam assembly 100 while simplifying the installation and adjustment process.

[0041] Optionally, the cross section of the beam body 110 is polygonal.

[0042] In a specific embodiment, the cross beam body 110 has a cylindrical shape; the cross section of the cross beam body 110 may be rectangular, triangular or other polygonal, and the specific cross section shape of the cross beam body 110 is not limited herein.

[0043] It is also necessary to mention that the butterfly spring 124 is specifically arranged on the matching surface between the first screw 122 and the beam body 110 .

[0044] It should also be noted that the first plane 111 is horizontal and parallel to the XY plane.

[0045] Furthermore, to improve the anti-loosening effect, after the butterfly spring 124 is passed through the first screw 122, the butterfly spring 124 can also be set on the abutment surface between the first plane 111 and the first adjusting stud 123, so that the first screw 122 passes through two butterfly springs 124 at different positions. Furthermore, in order to improve the connection strength of the first screw 122 to meet the rigid connection requirements, a metal gasket is further provided on the matching surface between the first screw 122 and the beam body 110 .

[0046] Optionally, to simplify the installation process, two first screws 122 are set at the end of the first section AA along the Y direction; three first screws 122 are set at the end of the first section BB along the Y direction, one of the first screws 122 is rigidly connected to the first adjusting stud 123, and the first screw 122 is set between the other two first screws 122.

[0047] See also Figure 2 , Figure 4 and Figure 5 In order to balance the torsion resistance of the beam body 110 in the Y direction, the first screw 122 located at the BB end of the first section and close to the symmetry axis of the multiple butterfly springs 124 is equidistant from at least two of the first screws 122 located at the AA end of the first section.

[0048] Furthermore, in order to reduce equipment operation errors, the position of the first cross section AA and the position of the first cross section BB are symmetrical relative to the center of gravity of the beam body 110 .

[0049] See also Figure 4 , Figure 5 , Figure 7 , Figure 8 as well as Fig. 9 In a specific embodiment of the present invention, the first adjusting screw 123 has an external screwing portion 123a, a first internal thread 123b and a first external thread 123c; The first internal thread 123b is threadedly matched with the first screw 122; after the first external thread 123c is threadedly connected with the first seat body 121-1 and the second seat body 121-2, the external screwing portion 123a is arranged between the beam body 110 and the first seat body 121-1 or the second seat body 121-2, and the shape of the external screwing portion 123a is a hexagonal prism.

[0050] It is understandable that the provision of the outer screwing portion 123 a can facilitate an operator to adjust the first adjusting screw 123 using an adjustable wrench or a fixed wrench.

[0051] It can also be understood that the first adjusting screw 123 is a non-standard part.

[0052] Furthermore, if Figure 8 and Fig. 9 As shown, in order to improve the connection strength between the first screw 122 and the first adjusting stud 123 and the reliability of the fixed connection; the first adjusting stud 123 is also formed with a through hole 123d and a glue injection hole 123e, the through hole 123d is located above the first internal thread 123b; the glue injection hole 123e passes through the side wall of the first adjusting stud 123 and is connected with the through hole 123d; After the first screw 122 is matched with the first internal thread 123b, glue is injected from the glue injection hole 123e into the through hole 123d and the first internal thread 123b, so that the first screw 122 and the first adjusting stud 123 are glued and fixed on the basis of the threaded connection.

[0053] Optionally, in order to ensure the bonding strength and curing speed of the glue, the glue is a two-component glue.

[0054] For further information, see Figure 2 and Figure 7 In order to improve the reliability of the fixed connection and threaded connection between the first adjusting stud 123 and the first seat body 121-1 and the second seat body 121-2 respectively, the first adjusting stud 123 is also provided with a first locking nut 125, the first locking nut 125 cooperates with the first external thread 123c, and the first locking nut 125 is glued and fixed to the first seat body 121-1 and the second seat body 121-2 respectively.

[0055] Optionally, it is disposed above the first seat body 121 - 1 or the second seat body 121 - 2 .

[0056] Optionally, the first locking nut 125 may be a hexagonal nut, or a circular nut with a limiting groove or a limiting hole.

[0057] Optionally, the inner diameter of the first locking nut 125 is larger than the outer diameter of the outer screwing portion 123 a , so that the first locking nut 125 can move to the radial position of the outer screwing portion 123 a before glue injection.

[0058] See also Figure 2 , Figure 6 , Figure 7 as well as Figures 10 to 16 , in a specific embodiment of the present invention, the beam adjuster 120 further includes a first top block 126 - 1 , a second top block 126 - 2 , a second screw 127 and a second adjustment stud 128 ; The first top block 126 - 1 and the second top block 126 - 2 are both fixedly connected to the first plane 111 by the second screws 127 . The first base body 121 - 1 and the second base body 121 - 2 are respectively formed with a first rectangular frame 121 a and a second rectangular frame 121 b ; The second adjusting studs 128 are respectively disposed through each side wall of the first rectangular frame 121a, and are used to abut and cooperate with the first top block 126-1 in the X direction and the Y direction; The second adjusting screws 128 are also respectively passed through a group of oppositely disposed side walls of the second rectangular frame 121b, and are used to abut and cooperate with the second top block 126-2 in the X direction or the Y direction; When the second adjusting screw 128 abuts against the first top block 126 - 1 or the second top block 126 - 2 , rotating the second adjusting screw 128 can be used to adjust the micro displacement of the beam body in the X direction or the Y direction.

[0059] It can be understood that after the first top block 126-1 is fixed to the first plane 111 by the second screw 127, the micro-displacement of the beam body 110 can be adjusted in the X direction by rotating the second adjusting stud 128 arranged along the X direction; and the micro-displacement of the beam body 110 can be adjusted in the Y direction by rotating the second adjusting stud 128 arranged along the Y direction.

[0060] Alternatively, if Fig.15 As shown, in the second top block 126 - 2 , when a group of second adjusting screws 128 are arranged opposite to each other in the Y direction, the micro displacement of the beam body 110 can be adjusted in the Y direction by rotating the second adjusting screws 128 .

[0061] Optionally, in the second top block 126 - 2 , when a group of second adjusting screws 128 are arranged opposite to each other in the X direction, the micro displacement of the beam body 110 can be adjusted in the X direction by rotating the second adjusting screws 128 .

[0062] In a preferred embodiment, in order to simplify the steps of fine adjustment of the beam body 110, the second adjustment stud 128 arranged along the Y direction is not provided in the second top block 126-2. It can be understood that the micro displacement of the beam body 110 in the X direction is adjusted mainly to overcome the accumulated length error of the beam body 110 in the extension direction (i.e., the X direction) of the beam body 110 due to thermal expansion and contraction.

[0063] In another preferred embodiment, in order to simplify the steps of fine-tuning the beam body 110, as shown in FIG. Fig.12 and Fig.15 The second adjusting stud 128 arranged along the X direction is not arranged in the second top block 126-2, so that when it is necessary to adjust the parallelism of the beam body 110 relative to the X direction, only the second adjusting stud 128 arranged along the Y direction abutting against the first top block 126-1 can be adjusted.

[0064] Therefore, the specific configuration of the second adjustment assembly further improves the installation accuracy of the beam assembly 100, thereby improving the measurement accuracy.

[0065] Specifically, the second adjusting screw 128 is formed with a second external thread 128a and a spherical groove 128b; a spherical segment 128d is provided in the spherical groove 128b, and the spherical segment 128d is abutted and matched with the first top block 126-1 or the second top block 126-2.

[0066] It can be understood that the cooperation between the spherical groove 128b and the ball part 128d can reduce the friction caused by the rotation of the second adjusting stud 128 and the cooperation with the ball part 128d, and the setting of the ball part 128d can minimize the scratches on the first top block 126-1 or the second top block 126-2.

[0067] Furthermore, in order to reduce the resistance encountered by the beam body 110 when the first adjusting stud 123 is used for fine adjustment in the Z direction, the contact surface between the spherical segment 128d and the first top block 126-1 or the second top block 126-2 is coated with a lubricant.

[0068] It can also be understood that the provision of the lubricant can further prevent the first top block 126 - 1 or the second top block 126 - 2 from being scratched.

[0069] Specifically, the second adjusting screw 128 is further formed with an inner screwing portion 128c, which is arranged away from the spherical groove 128b and is a hexagonal groove. It can be understood that the design of the hexagonal groove is to facilitate the rotation of the second adjusting screw 128 by an external hexagonal wrench.

[0070] Furthermore, the second adjusting stud 128 is also provided with a second locking nut 129, the second locking nut 129 cooperates with the second external thread 128a, and the second locking nut 129 is respectively glued and fixed to the first rectangular frame 121a and the second rectangular frame 121b. It can be understood that the second locking nut 129 is mainly provided to improve the reliability of the connection between the second external thread 128a and the first rectangular frame 121a and the second rectangular frame 121b.

[0071] Furthermore, in order to facilitate installation, the second locking nut 129 is disposed outside the first rectangular frame 121a and the second rectangular frame 121b.

[0072] See also Figure 1 , Figure 2 and Figure 3 In another preferred embodiment of the present invention, the cross section of the beam body 110 is a quadrilateral, so that the beam body 110 forms the first plane 111, the second plane 112, the third plane 113 and the fourth plane 114 which are adjacent to each other in sequence; The included angles formed by the extended surfaces of the first plane 111 , the second plane 112 and the third plane 113 are all acute angles; and the included angle between the first plane 111 and the extended surface of the third plane 113 is 45°.

[0073] It is understandable that the setting of the acute angle can increase the cross-sectional depth of the beam body 110, thereby improving the anti-bending deformation capability of the beam body 110. The setting of the angle of 45° is mainly for the convenience of improving the manufacturing accuracy.

[0074] Furthermore, the included angle between the second plane 112 and the extended plane of the third plane 113 is θ1, and the included angle between the third plane 113 and the fourth plane 114 is θ2, wherein the value of θ1 is similar to the angle value of θ2.

[0075] It can be understood that when the value of θ1 is similar to the value of θ2, the balance of the rear cross beam body 110 can be improved, thereby improving the torsional resistance of the cross beam body 110.

[0076] Specifically, see Figure 3 and Fig.18 The positions of θ1 and θ2 are mainly for installing the measuring head 200. When the value of θ1 is similar to the angle value of θ2, the stability of the measuring head 200 during operation can be improved, thereby improving the measurement accuracy.

[0077] Preferably, to ensure the mechanical strength of the beam body 110, θ1=θ2=60°. It should also be noted that the above angle limitation does not include the error caused by manufacturing precision.

[0078] Optionally, θ1=60°±5°; θ2=60°±5°.

[0079] Furthermore, in order to reduce stress concentration and improve the reliability of the mechanical strength of the beam body 110, the angle between the first plane 111 and the second plane 112, the angle between the second plane 112 and the third plane 113, and the angle between the third plane 113 and the fourth plane 114 are all chamfered 115.

[0080] See also Figure 1 , Fig.17 and Fig.18 The present invention further provides a bridge-type three-dimensional coordinate measuring machine 1000, which includes a measuring machine body (not shown), a measuring head 200, and a crossbeam assembly 100 as described above; The measuring head 200 is mounted on the beam body 110 , and the first seat body 121 - 1 and the second seat body 121 - 2 are fixedly connected to the measuring machine body respectively.

[0081] It can be understood that the bridge-type three-dimensional coordinate measuring machine 1000 includes any one of the above-mentioned beam assemblies 100, so the beneficial effects of the bridge-type three-dimensional coordinate measuring machine 1000 are not repeated here.

[0082] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A beam assembly, comprising a beam body arranged along the X direction, characterized in that: The crossbeam body has a first plane arranged horizontally; The crossbeam assembly further includes a crossbeam adjuster for supporting the crossbeam body and adjusting the height or tilt angle of the crossbeam body; The crossbeam adjuster comprises a first seat body, a second seat body, a first screw, a first adjusting stud and a butterfly spring; the first screw is used to connect the crossbeam body and the first adjusting stud, and the first adjusting stud is in abutment with the first plane; At the first cross-sectional end of the beam body, a plurality of the first screws along the Y direction are rigidly connected to the first seat body through the first adjusting studs; At the second cross-sectional end of the beam body, a plurality of the first screws along the Y direction are elastically connected to the second seat body through the butterfly spring and the first adjusting stud in sequence; wherein, at the second cross-sectional end, at least one of the first screws close to the symmetry axis of the plurality of butterfly springs is rigidly connected to the first seat body through the first adjusting stud; When the upper end surface of the first adjusting stud abuts against the first plane, rotating the first adjusting stud can adjust the height and the tilt angle of the beam body relative to the first seat body or the second seat body.

2. The crossbeam assembly according to claim 1, characterized in that: The first screw located at the end of the second cross section and close to the symmetry axes of the plurality of butterfly springs is equidistant from at least two of the first screws located at the end of the first cross section.

3. The crossbeam assembly according to claim 1, characterized in that: The first cross-sectional position and the second cross-sectional position are symmetrical relative to the center of gravity of the beam body.

4. The crossbeam assembly according to claim 1, characterized in that: The first adjusting screw has an external screwing portion, a first internal thread and a first external thread; The first internal thread cooperates with the first screw thread; after the first external thread is threadedly connected with the first seat body and the second seat body, the external screwing part is arranged between the beam body and the first seat body or the second seat body, and the shape of the external screwing part is a hexagonal prism.

5. The crossbeam assembly according to claim 4, characterized in that: The first adjusting stud is further formed with a through hole and a glue injection hole, wherein the through hole is located above the first internal thread; the glue injection hole penetrates the side wall of the first adjusting stud and is connected with the through hole; After the first screw is matched with the first internal thread, glue is injected from the glue injection hole into the through hole and the first internal thread.

6. The crossbeam assembly according to claim 5, characterized in that The first adjusting stud is also provided with a first locking nut, the first locking nut cooperates with the first external thread, and the first locking nut is respectively glued and fixed to the first seat body and the second seat body.

7. The crossbeam assembly according to any one of claims 1 to 6, characterized in that: The crossbeam adjuster also includes a first top block, a second top block, a second screw and a second adjustment stud; The first top block and the second top block are both fixedly connected to the first plane by the second screw. The first base body and the second base body are respectively formed with a first rectangular frame and a second rectangular frame; The second adjusting studs are respectively arranged through each side wall of the first rectangular frame, and are used for abutting and cooperating with the first top block in the X direction and the Y direction; The second adjusting studs are also respectively passed through a group of oppositely arranged side walls of the second rectangular frame, and are used for abutting and cooperating with the second top block in the X direction or the Y direction; When the second adjusting screw is in contact with the first top block or the second top block, rotating the second adjusting screw can be used to adjust the micro displacement of the beam body in the X direction or the Y direction.

8. The crossbeam assembly according to claim 7, characterized in that: The second adjusting stud is formed with a second external thread and a spherical groove; A spherical segment is arranged in the spherical groove, and the spherical segment is in abutment with the first top block or the second top block.

9. The crossbeam assembly according to claim 8, characterized in that The contact surface where the spherical segment abuts against the first top block or the second top block is coated with lubricant.

10. The crossbeam assembly according to claim 9, characterized in that The second adjusting screw is further formed with an inner screwing portion, the inner screwing portion is arranged away from the spherical groove, and the inner screwing portion is an inner hexagonal groove.

11. The crossbeam assembly according to claim 10, characterized in that The second adjusting stud is also provided with a second locking nut, the second locking nut cooperates with the second external thread, and the second locking nut is respectively glued and fixed to the first rectangular frame and the second rectangular frame.

12. The crossbeam assembly according to any one of claims 1 to 6, characterized in that: The cross section of the beam body is a quadrilateral, so that the beam body forms the first plane, the second plane, the third plane and the fourth plane which are adjacent to each other in sequence; The angles formed by the first plane, the second plane and the extended planes of the third plane are all acute angles; and the angle between the first plane and the extended plane of the third plane is 45°.

13. The crossbeam assembly according to claim 12, characterized in that The included angle between the second plane and the extended plane of the third plane is θ1, and the included angle between the third plane and the fourth plane is θ2, wherein the value of θ1 is similar to the angle value of θ2.

14. The crossbeam assembly according to claim 13, characterized in that θ1=θ2=60°.

15. The crossbeam assembly according to claim 12, characterized in that The corners between the first plane and the second plane, the corners between the second plane and the third plane, and the corners between the third plane and the fourth plane are all chamfered.

16. A bridge type three-dimensional coordinate measuring machine, characterized in that: It comprises a measuring machine body, a measuring head and a crossbeam assembly as claimed in any one of claims 1 to 15; The measuring head is mounted on the beam body, and the first seat body and the second seat body are respectively fixedly connected to the measuring machine body.

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