Cross beam supporting and adjusting device and three-coordinate measuring machine

Abstract

The utility model provides a crossbeam support adjusting device and a three-coordinate measuring machine, the crossbeam support adjusting device comprises a crossbeam, a first column, a second column, a fixed support and an adjustable support, the fixed support is connected with a first end of the crossbeam and the first column; the adjustable support is connected with the second end of the cross beam and the second stand column and comprises an adjusting bolt, a self-locking nut and a second supporting block, the self-locking nut is in spiral fit with the adjusting bolt, and the second supporting block is arranged between the self-locking nut and the cross beam and provided with a second supporting top face attached to the bottom face of the cross beam; the self-locking nut is rotated to drive the second end of the cross beam to ascend and descend, and levelness adjustment of the cross beam is achieved. According to the utility model, the Z-direction offset of the cross beam can be adjusted, so that the levelness of the cross beam is improved, and the adverse effect of the Z-direction offset of the cross beam on the measuring precision of the measuring machine is reduced; and the self-locking nut has a self-locking function, so that the second supporting block can be locked at a preset position and is not changed, and the long-term position stability of the cross beam can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring machines, and particularly relates to a beam support and adjustment device which can support and adjust a beam of a three-coordinate measuring machine, and a three-coordinate measuring machine equipped with the support and adjustment device. Background Art

[0002] The crossbeam is one of the core components of the coordinate measuring machine, and the deviation in its position directly affects the measuring accuracy of the measuring machine.

[0003] In the prior art, the two ends of the crossbeam of the three-dimensional coordinate measuring machine are directly fixed on the corresponding columns, and the Z-axis cannot be adjusted. When the crossbeam is installed, its axis cannot remain absolutely horizontal, and there may be an up and down offset in the Z direction. Accordingly, when the Z-axis slide moves in the X direction along the crossbeam, the Z-axis slide may have a certain displacement in the Z-axis direction, that is, the X-axis movement of the Z-axis slide cannot remain absolutely horizontal, thereby affecting the accuracy of the measuring machine.

[0004] Therefore, it is urgent to improve the existing beam installation structure so that the beam can be adjusted in the Z direction when it is installed to eliminate possible Z-direction offset as much as possible, thereby ensuring the measurement accuracy of the measuring machine. Summary of the invention

[0005] The utility model provides a crossbeam support adjustment device and a three-coordinate measuring machine, which can adjust the Z-direction deviation of the crossbeam, ensure the installation levelness thereof, and further improve the measuring accuracy of the measuring machine.

[0006] In order to solve the above technical problems, the technical solution adopted by the beam support adjustment device proposed in the utility model is a beam support adjustment device, comprising:

[0007] a beam having a first end and a second end;

[0008] A first column and a second column are respectively arranged corresponding to the first end and the second end of the beam, and are used to support the beam;

[0009] A fixed support, which is located between the bottom surface of the cross beam and the first column and connects the first end of the cross beam and the first column, and has a first support top surface that is in contact with the bottom surface of the cross beam;

[0010] An adjustable support is located between the bottom surface of the beam and the second column, and connects the second end of the beam and the second column; the adjustable support includes an adjusting bolt, a self-locking nut and a second support block, the head of the adjusting bolt faces downward and is fixedly connected to the second column, the self-locking nut is spirally matched with the adjusting bolt, the second support block is arranged between the self-locking nut and the beam, and has a second support top surface that is in contact with the bottom surface of the beam; the self-locking nut is rotated to drive the second end of the beam to rise and fall through the second support block, thereby realizing the horizontal adjustment of the beam.

[0011] A first ball socket portion coaxial with the self-locking nut is formed on the top surface of the self-locking nut; a first convex spherical washer is sandwiched between the second support block and the self-locking nut, and the first convex spherical washer is spherically matched with the first ball socket portion.

[0012] The crossbeam is provided with a stepped hole, the second support block is provided with a light hole, and the adjustment bolt is provided with an internal threaded hole extending along its axial direction. The stepped hole, the light hole and the internal threaded hole are coaxially aligned, and a long bolt passes through the stepped hole, the light hole, the first convex spherical washer and the internal threaded hole in sequence and is screwed with the internal threaded hole to connect the crossbeam, the second support block and the adjustment bolt as a whole; there is a Z-direction adjustment gap between the head of the long bolt and the stepped hole.

[0013] A second ball socket portion coaxial with the stepped hole is formed on the stepped top surface; a second convex spherical washer is provided between the head of the long bolt and the stepped top surface of the stepped hole, and the second convex spherical washer is spherically matched with the second ball socket portion.

[0014] The second support block is also fixedly connected to the crossbeam individually by screws.

[0015] Two through slots are provided on both sides of the circumference of the self-locking nut, the outer slot of the slot passes through the outer wall of the self-locking nut, and the inner slot passes through the inner wall of the self-locking nut, and the inner slots of the two slots are not connected;

[0016] The self-locking nut is provided with a bolt hole which is parallel to and passes through the axial direction thereof, the bolt hole is arranged corresponding to the slot and passes through the slot, and a locking bolt is threadedly connected to the inner thread of the bolt hole.

[0017] The slots are arranged horizontally, and the two slots are symmetrical to each other. The number of the bolt holes is two, and each of them is close to the middle position of the outer notch of the slot.

[0018] The height of the slot is less than or equal to the pitch of the self-locking nut.

[0019] The fixed support comprises a fixed support and a first support block connected as one body, the fixed support is fixedly connected to the first column, the first support block is arranged on the top surface of the fixed support and is fixedly connected to the crossbeam, and the top surface of the first support is the top surface of the first support block;

[0020] Two third ball sockets are formed on the top surface of the fixed support; two third convex spherical washers are correspondingly sandwiched between the first support block and the fixed support, and the third convex spherical washers are spherically matched with the third ball socket.

[0021] The utility model also provides a three-coordinate measuring machine, comprising the above-mentioned beam support adjustment device, wherein the first column and the second column are arranged on opposite sides of the workbench of the three-coordinate measuring machine.

[0022] Compared with the prior art, the utility model has the following advantages and positive effects:

[0023] 1. In the utility model, the first end of the crossbeam is connected to the first column through a fixed support, and the second end is connected to the second column through an adjustable support. The adjustable support includes an adjusting bolt, a self-locking nut and a second support block. The self-locking nut is spirally matched with the adjusting bolt. The second support block is arranged between the self-locking nut and the crossbeam and fits with the bottom surface of the crossbeam to support the second end of the crossbeam. By rotating the self-locking nut, the adjusting bolt can be lifted and lowered along the axial direction, thereby driving the second support block to lift and lower, so as to adjust the position of the second end of the crossbeam, and then adjust the Z-direction offset of the crossbeam, thereby improving the horizontality of the crossbeam and reducing the adverse effect of the Z-direction offset of the crossbeam on the measurement accuracy of the measuring machine;

[0024] 2. The self-locking nut has a self-locking function, which can lock the second support block at the pre-adjusted position, which is beneficial to ensure the long-term position stability of the beam, thereby ensuring the long-term stable and normal operation of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the beam support adjustment device in the embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure from a top perspective after the first column and the second column are omitted in the embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the crossbeam support adjustment device in the embodiment of the utility model when the first column and the second column are omitted from the bottom perspective;

[0029] Figure 4 This is a schematic diagram of the structure of the cross beam support adjustment device in the embodiment of the utility model when the first column and the second column are omitted from the bottom surface of the cross beam;

[0030] Figure 5 for Figure 4 AA section view;

[0031] Figure 6 for Figure 4 BB cross-sectional view;

[0032] Figure 7 This is a schematic diagram of an adjustable supporting three-dimensional structure in an embodiment of the utility model;

[0033] Figure 8 It is a three-dimensional structural schematic diagram of the self-locking nut from the top perspective in the embodiment of the utility model;

[0034] Fig. 9 It is a three-dimensional structural schematic diagram of the self-locking nut from the bottom perspective in the embodiment of the utility model;

[0035] Fig.10 It is a front view from the top perspective of the self-locking nut in the embodiment of the utility model;

[0036] Fig.11 for Fig.10 CC section view;

[0037] Fig.12 It is a schematic diagram of a fixed support three-dimensional structure in an embodiment of the utility model.

[0038] Reference numerals:

[0039] 100, beam; 110, first end; 120, second end; 130, bottom surface; 140, first stepped hole; 150, first spherical washer assembly; 160, second stepped hole; 170, second spherical washer assembly; 200, first column; 300, second column; 400, fixed support; 410, fixed support; 411, second ball socket; 412, second internal threaded hole; 420, first support block; 421, first support top Surface; 422, second light hole; 430, second convex spherical washer 500, adjustable support; 510, adjustment bolt; 511, first internal threaded hole; 520, self-locking nut; 521, first ball socket; 522, slot; 523, outer notch; 524, inner notch; 525, bolt hole; 526, locking bolt; 530, second support block; 531, first light hole; 532, second support top surface; 540, first convex spherical washer. Implementation

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] In some embodiments of the present invention, a three-coordinate measuring machine is proposed, specifically, it can be a fixed bridge type three-coordinate measuring machine, including a control unit, a workbench, a beam support adjustment device, a slide, a Z-axis, etc.

[0043] Reference Figures 1 to 12 In some embodiments of the present invention, the beam support adjustment device includes a beam 100 , a first column 200 , a second column 300 , a fixed support 400 and an adjustable support 500 .

[0044] The crossbeam 100 is extended along the X direction of the three-dimensional coordinate measuring machine, the slide is slidably arranged on the crossbeam 100, and the Z axis is arranged on the slide.

[0045] In some embodiments of the present invention, the crossbeam 100 is a triangular crossbeam, that is, in the shape of a triangular prism, having a first end 110 and a second end 120. The crossbeam 100 includes five side surfaces, namely, a front side surface, a rear side surface, a bottom surface 130, a left end surface and a right end surface. In the installed state, the front side surface, the rear side surface and the bottom surface 130 are all inclined relative to the horizontal plane, and the left end surface and the right end surface are perpendicular to the horizontal plane. Of course, the crossbeam 100 can also be a rectangular crossbeam, that is, in the shape of a cuboid, and no specific limitation is made here.

[0046] The first column 200 and the second column 300 are spaced apart along the X direction on opposite sides of the workbench of the three-dimensional coordinate measuring machine, and are respectively arranged corresponding to the first end 110 and the second end 120 of the beam 100 to support the beam 100 below both ends.

[0047] The fixed support 400 is located between the bottom surface 130 of the beam 100 and the first column 200, and connects the first end 110 of the beam 100 and the first column 200, so that the first column 200 supports the first end 110 of the beam 100 through the fixed support 400. The fixed support 400 has a first support top surface 421 that is in contact with the bottom surface 130 of the beam 100.

[0048] The adjustable support 500 is located between the bottom surface 130 of the beam 100 and the second column 300 , and connects the second end 120 of the beam 100 and the second column 300 , so that the second column 300 supports the second end 120 of the beam 100 through the adjustable support 500 .

[0049] The adjustable support 500 includes an adjusting bolt 510, a self-locking nut 520 and a second support block 530. The head of the adjusting bolt 510 faces downward, that is, the bolt head is at the bottom and the stud is at the top. The adjusting bolt 510 is fixedly connected to the second column 300. The self-locking nut 520 is sleeved on the adjusting bolt 510 and is spirally matched with the adjusting bolt 510. The second support block 530 is arranged between the self-locking nut 520 and the beam 100, and has a second support top surface 532 that is in contact with the bottom surface 130 of the beam 100.

[0050] Since the adjusting bolt 510 is fixedly connected to the second column 300, the second column 300 is fixed on the workbench, and the self-locking nut 520 is spirally matched with the adjusting bolt 510, when the self-locking nut 520 is rotated, the self-locking nut 520 will perform a lifting and lowering movement along the axial direction of the adjusting bolt 510 while rotating, thereby driving the second support block 530 to be lifted and lowered, and the second support block 530 drives the second end 120 of the beam 100 to be lifted and lowered, and the first end 110 of the beam 100 is connected to the fixed support 400 and its position remains unchanged. Then, by lifting and lowering the second end 120 of the beam 100, the Z-direction offset of the beam 100 can be adjusted, that is, the horizontality of the beam 100 can be adjusted to keep its axis as absolutely horizontal as possible.

[0051] Specifically, whether the axis of the beam 100 is horizontal can be measured by a high-precision level.

[0052] like Figure 5 , Figures 7 to 11 As shown, a first ball socket portion 521 coaxial with the self-locking nut 520 is formed on the top surface thereof, and a first convex spherical washer 540 is sandwiched between the second support block 530 and the self-locking nut 520. The first convex spherical washer 540 cooperates with the spherical surface of the first ball socket portion 521, so that automatic compensation and centering of the self-locking nut 520 and the second support block 530 can be achieved, thereby improving the support stability. Moreover, the first convex spherical washer 540 cooperates with the spherical surface of the first ball socket portion 521, so that the contact area is larger, the force on the second support block 530 is more uniform and reasonable, and the structure is more stable.

[0053] For the connection between the adjustable support 500 and the crossbeam 100, as Figure 4 and Figure 5As shown, the cross beam 100 is provided with a first stepped hole 140, the second support block 530 is provided with a first light hole 531, and the adjusting bolt 510 is provided with a first internal threaded hole 511 extending along its axial direction. The first stepped hole 140, the first light hole 531, and the first internal threaded hole 511 are coaxially aligned, and a long bolt is used to sequentially pass through the first stepped hole 140, the first light hole 531, the center hole of the first convex spherical washer 540 and the first internal threaded hole 511 and finally engage with the first internal threaded hole 511. The threads are screwed together to connect the beam 100, the second support block 530 and the adjusting bolt 510 as a whole; the head of the long bolt is located in the first stepped hole 140 and there is a Z-direction adjustment gap between the long bolt and the first stepped hole 140, that is, the long bolt is fixedly connected to the adjusting bolt 510, and is loosely connected to the beam 100, the second support block 530, the first convex spherical washer 540, and the self-locking nut 520, so that the second end 120 of the beam 100 can be driven to rise and fall by rotating the self-locking nut 520.

[0054] In some embodiments of the utility model, a first spherical washer assembly 150 is provided on the stepped top surface of the first stepped hole 140, and the first spherical washer assembly 150 includes a convex spherical washer and a concave spherical washer, and the two are spherically matched; the first spherical washer assembly 150 is located between the head of the long bolt and the stepped top surface of the first stepped hole 140, and the first spherical washer assembly 150 can realize automatic compensation and centering of the long bolt and the beam 100, and make the force on the beam 100 more uniform and reasonable, further improve the structural stability, and avoid bending and deformation of the bolts.

[0055] Since the adjustable support 500 includes multiple parts and is located below the crossbeam 100, the second support block 530 is also fixedly connected to the crossbeam 100 by screws for easy assembly. During assembly, the self-locking nut 520 can be assembled on the adjustment bolt 510 first, and then the first convex spherical washer 540 can be placed on the first ball socket 521 of the self-locking nut 520; after aligning the first stepped hole 140 of the crossbeam 100 and the first light hole 531 of the second support block 530, the two are screwed together, and then the first light hole 531 of the second support block 530 is aligned with the first internal threaded hole 511 of the adjustment bolt 510, and long bolts are used for connection, which can effectively avoid the problem of difficult alignment and connection of multiple scattered parts during assembly.

[0056] The self-locking nut 520 can adopt a nut with a self-locking function or an anti-loosening nut in the prior art, or a corresponding anti-loosening structure can be set on an ordinary nut. There is no specific limitation on the specific structure of the self-locking nut 520.

[0057] In some embodiments of the present invention, the structure of the self-locking nut 520 is as follows: Figures 7 to 11As shown, two through slots 522 are provided on both sides of the circumference of the self-locking nut 520, the outer slot 523 of the slot 522 penetrates the outer wall of the self-locking nut 520, the inner slot 524 penetrates the inner wall of the self-locking nut 520, and the inner slots 524 of the two slots 522 are not connected. The self-locking nut 520 is divided into two upper and lower sections with internal threads by the slot 522, and the portion on the inner wall of the self-locking nut 520 corresponding to the slot 522 is the inner slot 524 of the slot 522, which has no internal threads.

[0058] The self-locking nut 520 is provided with a bolt hole 525 which is parallel to and passes through the axial direction thereof. The bolt hole 525 is arranged corresponding to the slot 522 and passes through the slot 522 . A locking bolt 526 is connected to the inner thread of the bolt hole 525 .

[0059] After the self-locking nut 520 is adjusted to the pre-adjusted position, the locking bolt 526 is used to lock the self-locking nut 520 in place, so that the slot 522 is axially tensioned and deformed, causing the upper and lower sections of the internal threads formed by the slot 522 to shrink inward, forming a double nut locking situation, and at the same time causing the threaded part of the self-locking nut 520 to deform, increasing the connection friction resistance, achieving the purpose of self-locking, thereby ensuring the long-term position stability of the beam 100 and ensuring the long-term stable and normal operation of the machine. Remove the locking bolt 526, and the deformation of the self-locking nut 520 will be restored.

[0060] Furthermore, the slots 522 are arranged horizontally, the two slots 522 are symmetrical to each other, and the number of bolt holes 525 is two, each close to the middle position of the outer notch 523 of the slot 522, so that a smaller locking force can cause the slots 522 of the self-locking nut 520 to deform.

[0061] The portion of the self-locking nut 520 below the slot 522 is relatively thin, so that the portion can be driven to deform when the locking bolt 526 is tightened.

[0062] The height of the slot 522 is less than or equal to the pitch of the self-locking nut 520 .

[0063] For the fixed support 400, as Figure 3 , Figure 4 , Figure 6 and Fig.12 As shown, it includes a fixed support 410 and a first support block 420 connected as an integral whole. The fixed support 410 is fixedly connected to the first column 200, specifically, it can be fixed by a plurality of screws. The first support block 420 is arranged on the top surface of the fixed support 410 and is fixedly connected to the beam 100. The top surface of the first support block 420 is the first support top surface 421 of the fixed support 400.

[0064] Two second ball sockets 411 are formed on the top surface of the fixed support 410; two second convex spherical washers 430 are correspondingly sandwiched between the first support block 420 and the fixed support 410, and the second convex spherical washers 430 are spherically matched with the second ball sockets 411. The second convex spherical washers 430 and the second ball sockets 411 are spherically matched between the first support block 420 and the fixed support 410 to achieve automatic compensation and centering of the first support block 420 and the fixed support 410, and make the force on the first support block 420 more uniform and reasonable, avoid stress concentration, and further improve the structural stability.

[0065] In the fixed support 400, two mating locations for the second convex spherical washers 430 and the spherical surface of the second ball socket 411 are arranged between the fixed support 410 and the first support block 420. In the adjustable support 500, one mating location for the first convex spherical washer 540 and the spherical surface of the first ball socket 521 is arranged between the second support block 530 and the self-locking nut 520. The three mating locations are configured to be non-collinear, that is, to form a three-point distributed support. The three points determine the plane, thereby ensuring that the adjustment plane is fully defined, thereby improving the adjustment accuracy of the beam 100.

[0066] For the connection between the fixed support 400 and the crossbeam 100, as Figure 4 , Figure 6 , Fig.10 and Fig.12 As shown, two second stepped holes 160 are provided on the crossbeam 100, two second light holes 422 are provided on the first support block 420, and two second internal threaded holes 412 are provided on the fixed support 410, wherein one second stepped hole 160, one second light hole 422, and one second internal threaded hole 412 are coaxially aligned, and a long bolt is used to sequentially pass through the second stepped hole 160, the second light hole 422, the center hole of a second convex spherical washer 430, and the second internal threaded hole 412, and finally connect with the second stepped hole 160, the second light hole 422, the center hole of a second convex spherical washer 430, and the second internal threaded hole 412. The two internal threaded holes 412 are threadedly screwed together; similarly, another second stepped hole 160, another second light hole 422, and another second internal threaded hole 412 are coaxially aligned, and another long bolt is used to pass through the second stepped hole 160, the second light hole 422, the center hole of another second convex spherical washer 430 and the second internal threaded hole 412 in sequence and finally threadedly screwed together with the second internal threaded hole 412; the two long bolts connect the beam 100, the first support block 420 and the fixed support 410 as a whole.

[0067] In some embodiments of the utility model, a second spherical washer assembly 170 is provided on the top surface of the step of the second stepped hole 160, and the second spherical washer assembly 170 includes a convex spherical washer and a concave spherical washer, and the two are spherically matched; the second spherical washer assembly 170 is located between the head of the long bolt and the top surface of the step of the second stepped hole 160, and the second spherical washer assembly 170 can realize automatic compensation and centering of the long bolt and the beam 100, and make the force on the beam 100 more uniform and reasonable, further improve the structural stability, and avoid bending and deformation of the bolts.

[0068] Since the fixed support 400 includes multiple parts and is located below the crossbeam 100, the first support block 420 is also fixedly connected to the crossbeam 100 by screws for easy assembly. During assembly, the second stepped hole 160 of the crossbeam 100 and the second light hole 422 of the first support block 420 can be aligned first, and then the two can be screwed together, and then the light hole of the first support block 420 can be aligned with the second internal threaded hole 412 of the fixed support 410, and long bolts can be used for connection, which can effectively avoid the problem of difficult alignment and connection of multiple scattered parts during assembly.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A beam support adjustment device, characterized in that: include: a beam having a first end and a second end; A first column and a second column are respectively arranged corresponding to the first end and the second end of the beam, and are used to support the beam; A fixed support, which is located between the bottom surface of the cross beam and the first column and connects the first end of the cross beam and the first column, and has a first support top surface that is in contact with the bottom surface of the cross beam; An adjustable support is located between the bottom surface of the beam and the second column, and connects the second end of the beam and the second column; the adjustable support includes an adjusting bolt, a self-locking nut and a second support block, the head of the adjusting bolt faces downward and is fixedly connected to the second column, the self-locking nut is spirally matched with the adjusting bolt, the second support block is arranged between the self-locking nut and the beam, and has a second support top surface that is in contact with the bottom surface of the beam; the self-locking nut is rotated to drive the second end of the beam to rise and fall through the second support block, thereby realizing the horizontal adjustment of the beam.

2. The beam support adjustment device according to claim 1, characterized in that: A first ball socket portion coaxial with the self-locking nut is formed on the top surface of the self-locking nut; a first convex spherical washer is sandwiched between the second support block and the self-locking nut, and the first convex spherical washer is spherically matched with the first ball socket portion.

3. The beam support adjustment device according to claim 2, characterized in that: The crossbeam is provided with a stepped hole, the second support block is provided with a light hole, and the adjustment bolt is provided with an internal threaded hole extending along its axial direction. The stepped hole, the light hole and the internal threaded hole are coaxially aligned, and a long bolt passes through the stepped hole, the light hole, the first convex spherical washer and the internal threaded hole in sequence and is screwed with the internal threaded hole to connect the crossbeam, the second support block and the adjustment bolt as a whole; there is a Z-direction adjustment gap between the head of the long bolt and the stepped hole.

4. The beam support adjustment device according to claim 3, characterized in that: A second ball socket portion coaxial with the stepped hole is formed on the stepped top surface; a second convex spherical washer is provided between the head of the long bolt and the stepped top surface of the stepped hole, and the second convex spherical washer is spherically matched with the second ball socket portion.

5. The beam support adjustment device according to claim 3, characterized in that: The second support block is also fixedly connected to the crossbeam individually by screws.

6. The beam support adjustment device according to claim 1, characterized in that: Two through slots are provided on both sides of the circumference of the self-locking nut, the outer slot of the slot passes through the outer wall of the self-locking nut, and the inner slot passes through the inner wall of the self-locking nut, and the inner slots of the two slots are not connected; The self-locking nut is provided with a bolt hole which is parallel to and passes through the axial direction thereof, the bolt hole is arranged corresponding to the slot and passes through the slot, and a locking bolt is threadedly connected to the inner thread of the bolt hole.

7. The beam support adjustment device according to claim 6, characterized in that: The slots are arranged horizontally, and the two slots are symmetrical to each other. The number of the bolt holes is two, and each of them is close to the middle position of the outer notch of the slot.

8. The beam support adjustment device according to claim 6, characterized in that: The height of the slot is less than or equal to the pitch of the self-locking nut.

9. The beam support adjustment device according to claim 1, characterized in that: The fixed support comprises a fixed support and a first support block connected as one body, the fixed support is fixedly connected to the first column, the first support block is arranged on the top surface of the fixed support and is fixedly connected to the crossbeam, and the top surface of the first support is the top surface of the first support block; Two third ball sockets are formed on the top surface of the fixed support; two third convex spherical washers are correspondingly sandwiched between the first support block and the fixed support, and the third convex spherical washers are spherically matched with the third ball socket.

10. A three-dimensional coordinate measuring machine, characterized in that: The crossbeam support and adjustment device comprises the crossbeam support and adjustment device according to any one of claims 1 to 9, wherein the first column and the second column are arranged on opposite sides of a worktable of a three-dimensional coordinate measuring machine.

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