Closed carriage system applied to three-coordinate measuring machine

Abstract

The embodiment of the utility model provides a closed carriage system applied to a three-coordinate measuring machine, comprising: an X-axis guide seat comprising an X-axis guide cavity enclosed by a main support plate, an outer vertical plate, an upper plate and a lower plate, and a plurality of air bearings provided with air floating end surfaces and arranged at the periphery of the X-axis guide cavity; the Z-axis guide seat comprises a Z-axis guide cavity defined by a Z-axis supporting plate, a Z-axis outer plate, a left side plate and a right side plate, and the extending direction of the Z-axis guide cavity is perpendicular to the extending direction of the X-axis guide cavity; wherein the outer vertical plate comprises a main mounting hole and a main supporting plate, the main supporting plate and the main mounting hole form a mounting space, the air bearing is arranged in the mounting space, a full-coating structure is formed in the X-axis direction and the Z-axis direction, the bearing capacity is large, the precision can be guaranteed at the same time, and meanwhile the bearing capacity is improved. By means of the installation mode, all the air bearings are easy to install and debug, and the installation and debugging process is greatly simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to a closed gantry system applied to a coordinate measuring machine. BACKGROUND

[0002] The coordinate measuring machine is an instrument that can realize the measuring ability of geometry shape, length and circumference graduation in a hexahedral space range, and its measuring functions include size accuracy, positioning accuracy, geometry accuracy and profile accuracy, etc., and it is widely used in mold, aviation, automobile, electronics and other industries.

[0003] The coordinate measuring machine usually includes a base capable of supporting an article to be inspected and a frame mounted on the base for holding a Z-axis spindle which in turn is adapted to hold an article inspection device, for example, for inspecting the article. The base, the frame and / or the Z-axis spindle are usually configured so that the inspection device, such as a measuring probe, and the article can be moved relative to each other along at least one axis, or more typically along three mutually orthogonal axes X, Y and Z.

[0004] Generally, an X-axis beam is provided on the frame, and a Z-axis assembly including the Z-axis spindle is configured to move along the X-axis beam so that a measuring probe arranged at the end of the Z-axis spindle is displaced in the X-axis direction. Meanwhile, the Z-axis spindle is also configured to be displaced in the Z-axis direction. For this purpose, an air-floating support is provided on the X-axis beam, which needs to be moved along the Y-axis beam with high precision and also needs to bear the entire Z-axis assembly. Since the bearing capacity and the precision are in a contrary relationship, i.e. it is difficult to maintain or improve the precision after increasing the bearing capacity of the air-floating support, the existing air-floating support is difficult to simultaneously satisfy the bearing and the precision.

[0005] Therefore, a new structure is given in the patent document JP3430644A coordinate measuring machine, in which the X-axis beam is provided in an open structure to form four sub-supports, and the air-floating support is arranged between the four sub-supports of the X-axis beam. This structure can have high bearing capacity and high precision, but this way of structure is too complex, and since the X-axis beam actually covers the air-floating support, on the one hand, the manufacturing difficulty of the high-precision X-axis beam is increased, and on the other hand, the air-floating support is arranged between the four sub-supports, which further increases the installation, adjustment, maintenance difficulty, and brings inconvenience to the installation, adjustment and maintenance.

[0006] In further improvements, as proposed in patent document CN219262984U, a high-bearing high-precision air floatation support device includes a central support and a plurality of air floatation bearings, the air floatation bearings include air floatation end faces, the central support includes a central plate, a plurality of support plates, an X-axis cover plate, and a Z-axis cover plate, the support plates and the X-axis cover plate define X-axis guide grooves, the support plates and the Z-axis cover plate define Z-axis guide grooves, the air floatation end faces of the air floatation bearings define X-axis guide spaces and Z-axis guide spaces, the X-axis guide spaces include X-axis first guide zones and X-axis second guide zones in the X-axis direction, the Z-axis guide spaces include Z-axis first guide zones and Z-axis second guide zones in the Z-axis direction, the peripheries of the X-axis first guide zones, the X-axis second guide zones, the Z-axis first guide zones, and the Z-axis second guide zones are each surrounded by the air floatation bearings, so that at least two fully-coated air floatation structures are formed in the X-axis direction and the Z-axis direction, thereby realizing and ensuring high precision while realizing greater bearing capacity. In this structure, at least two fully-coated air floatation structures need to be formed in the X-axis direction and the Z-axis direction, and meanwhile, the central support is a monolithic structure, so that the overall structure is complex, and meanwhile, installation and debugging are relatively complex and difficult.

[0007] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. SUMMARY

[0008] To this end, the present application provides a closed slide system applied to a three-coordinate measuring machine to solve the above technical problems.

[0009] A closed slide system applied to a three-coordinate measuring machine, comprising:

[0010] An X-axis guide seat including an X-axis guide cavity formed by a main support plate, an outer vertical plate, an upper plate, and a lower plate, and a plurality of air floatation bearings provided around the periphery of the X-axis guide cavity and having air floatation end faces;

[0011] A Z-axis guide seat including a Z-axis guide cavity formed by a Z-axis support plate, a Z-axis outer plate, a left side plate, and a right side plate, wherein the extension direction of the Z-axis guide cavity is perpendicular to the extension direction of the X-axis guide cavity;

[0012] The outer vertical plate includes a main mounting hole penetrating through the thickness direction of the outer vertical plate and a main support plate provided in the main mounting hole, the main support plate and the main mounting hole form a mounting space, and an air floatation bearing is arranged in the mounting space, and the air floatation end face of the air floatation bearing in the mounting space faces the X-axis guide cavity.

[0013] The mounting hole is a stepped hole including a lower hole portion adjacent to the X-axis guide cavity and an upper hole portion away from the X-axis guide cavity, and the main support plate and the lower hole portion form a mounting space.

[0014] The hole diameter of the lower hole portion is smaller than the hole diameter of the upper hole portion.

[0015] Wherein, in the upper hole part of the main mounting hole, a pair of bearing platforms are further included, and the main supporting plate is bridged on the pair of bearing platforms.

[0016] Wherein, the main mounting hole has an even number, and each main mounting hole is provided with a corresponding air floating bearing, and the even number of air floating bearings are arranged in rows, which are the first row of air floating bearings, the second row of air floating bearings, and the Nth row of air floating bearings, wherein the center points of each row of air floating bearings are connected in parallel to the X-axis direction, and the center points of the corresponding air floating bearings in the adjacent rows of air floating bearings are connected in parallel to the Z-axis direction.

[0017] Wherein, the X-axis driving hole is arranged between the first row of air floating bearings, and the X-axis driving hole penetrates the thickness direction of the outer vertical plate and makes at least part of the X-axis cross beam exposed through the X-axis driving hole.

[0018] Wherein, the lower plate further includes a lower mounting hole, and a lower supporting plate is arranged in the lower mounting hole, and an air floating bearing is arranged on the lower supporting plate.

[0019] Wherein, the length direction of the lower supporting plate is inclined to the X-axis direction.

[0020] Wherein, the included angle between the length direction of the lower supporting plate and the X-axis direction is 10-35°.

[0021] Wherein, the Z-axis supporting plate is stacked on the main supporting plate, and the main supporting plate, the outer vertical plate, the upper plate and the lower plate are detachably arranged, and the Z-axis supporting plate, the Z-axis outer plate, the left side plate and the right side plate are also detachably arranged.

[0022] Beneficial effects: the embodiment of the utility model provides a closed type slide system applied to three coordinate measuring machines, which comprises: an X-axis guide seat, which comprises an X-axis guide cavity formed by a main supporting plate, an outer vertical plate, an upper plate and a lower plate and a plurality of air floating bearings with air floating end faces arranged around the X-axis guide cavity; a Z-axis guide seat, which comprises a Z-axis guide cavity formed by a Z-axis supporting plate, a Z-axis outer plate, a left side plate and a right side plate, and the extension direction of the Z-axis guide cavity is perpendicular to the extension direction of the X-axis guide cavity; wherein, the outer vertical plate comprises main mounting holes penetrating the thickness direction of the outer vertical plate and main supporting plates arranged in the main mounting holes, the main supporting plates and the main mounting holes form a mounting space, an air floating bearing is arranged in the mounting space, and the air floating end face of the air floating bearing in the mounting space faces the X-axis guide cavity, through the above arrangement, a full cladding structure is formed in the X-axis direction and the Z-axis direction, which has large bearing capacity and can ensure precision at the same time, meanwhile, this mounting form makes each air floating bearing easier to install and debug, and greatly simplifies the installation and debugging process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1Embodiments of the utility model provide a closed slide system for three coordinate measuring machines, which is movably arranged on the X-axis beam 100 and movably limits the position of the Z-axis spindle 200, and provides support for the Z-axis displacement assembly.

[0024] Figure 2 For Figure 1 left rear perspective view schematic diagram;

[0025] Figure 3 For Figure 1 front view;

[0026] Figure 4 For Figure 1 rear view;

[0027] Figure 5 For Figure 1 top view;

[0028] Figure 6 For Figure 1 bottom view;

[0029] Figure 7 For Figure 1 left view;

[0030] Figure 8 For Figure 5 sectional view at A-A;

[0031] Illustrated element symbol explanation:

[0032] X-axis guide seat 10;X-axis beam 100;X-axis guide cavity 101;Main support plate 11;Outer vertical plate 12;X-axis drive hole 121;Main mounting hole 122;Installation space 1220;Lower hole part 1221;Convex part 1222;Upper hole part 1223;Pier 1224;Main support plate 123;Upper plate 13;Lower plate 14;Lower mounting hole 141;Lower support plate 142;Z-axis guide seat 20;Z-axis spindle 200;Z-axis guide cavity 201;Z-axis support plate 21;Z-axis outer plate 22;Left side plate 23;Right side plate 24;Air bearing 30;Air bearing end face 301. DETAILED DESCRIPTION

[0033] Please combine with reference Figures 1-8 Embodiments of the utility model provide a closed slide system for three coordinate measuring machines, which is movably arranged on the X-axis beam 100 and movably limits the position of the Z-axis spindle 200, and provides support for the Z-axis displacement assembly.

[0034] The closed slide system includes X-axis guide seat 10 and Z-axis guide seat 20.

[0035] The X-axis guide seat 10 is used for providing support for X-axis drive assembly (not shown) and Z-axis guide seat 20, and enabling the whole closed slide system to move along the X-axis direction under the drive of X-axis drive assembly, please refer toFigure 1 In Figure 1 X-axis direction, Y-axis direction and Z-axis direction are shown in the figure, wherein the X-axis direction is approximately the left-right direction in the figure, the Y-axis direction is approximately the direction perpendicular to the paper surface, and the Z-axis direction is approximately the up-down direction in the figure. In addition, the movement of the Y-axis direction in the bridge type three-coordinate measuring machine can be realized by moving the portal, which is not described herein. Figure 1 Figure 1 In the bridge type three-coordinate measuring machine, the movement of the Y-axis direction can be realized by moving the portal, which is not described herein.

[0036] The X-axis guide seat 10 comprises an X-axis guide cavity 101 formed by a main support plate 11, an outer vertical plate 12, an upper plate 13 and a lower plate 14, and a plurality of air floating bearings 30 with air floating end faces 301 arranged around the X-axis guide cavity 101.

[0037] The main support plate 11 comprises a main plate body, which comprises a first side face facing the direction of the X-axis guide cavity 101 and a second side face opposite to the first side face. The outer vertical plate 12 is arranged opposite to the main plate body at a distance, and comprises an outer plate body, which comprises a third side face facing the direction of the X-axis guide cavity 101 and a fourth side face opposite to the third side face. The upper plate 13 and the lower plate 14 are arranged between the main support plate 11 and the outer vertical plate 12, and form a “mouth” shape. The X-axis guide cavity 101 is the space in the “mouth” shape. It can be understood that the X-axis guide cavity 101 is used for accommodating the X-axis beam 100. Meanwhile, the X-axis guide cavity 101 comprises an extension direction, and the extension direction of the X-axis guide cavity 101 is parallel to the X-axis direction.

[0038] In the embodiment, the X-axis beam 100 is configured as a rectangular cross section, so that it has four mutually perpendicular outer surfaces. The main support plate 11, the outer vertical plate 12, the upper plate 13 and the lower plate 14 are configured to correspond to the four mutually perpendicular support surfaces of the X-axis beam 100 respectively. Meanwhile, the air floating bearings 30 are arranged on the main support plate 11, the outer vertical plate 12, the upper plate 13 and the lower plate 14. The air floating bearings 30 comprise air floating end faces 301, and the air floating end faces 301 of the air floating bearings 30 define an X-axis guide space inside the X-axis guide cavity 101. The X-axis beam 100 is arranged in the X-axis guide space. A gap is arranged between each air floating end face 301 and the support surface, and the gap between the air floating end face 301 and the support surface is 2-8 μm, and more preferably 2-5 μm. The air floating end face 301 refers to the side of the air floating bearing 30 facing the support surface and forming an air film. In the embodiment, the air floating end faces 301 of the air floating bearings 30 are circular.

[0039] Further, the adjacent two plates of the main support plate 11, the outer vertical plate 12, the upper plate 13 and the lower plate 14 are arranged perpendicular to each other.

[0040] ​Further, the main support plate 11 is provided with a first recess portion on the first side, and a gas bearing 30 is arranged in each first recess portion. The upper plate 13 is also provided with a second recess portion in the direction of the X-axis guide cavity 101, and a gas bearing 30 is arranged in the second recess portion.

[0041] Further, the first side is provided with a first boss extending in the direction of the X-axis guide cavity 101 at both ends, the third side is provided with a second boss extending in the direction of the X-axis guide cavity 101 at both ends, and the upper plate 13 is arranged between the first boss and the second boss and connects the first boss and the second boss.

[0042] The outer vertical plate 12 includes a main mounting hole 122 extending through the thickness direction of the outer vertical plate 12 and a main support plate 123 bridging the main mounting hole 122. The main support plate 123 and the main mounting hole 122 form a mounting space 1220, and a gas bearing 30 is arranged in the mounting space 1220, with the gas floating end face 301 of the gas bearing 30 in the mounting space 1220 facing the X-axis guide cavity 101.

[0043] In this embodiment, the main mounting hole 122 is a stepped hole, including a lower hole portion 1221 adjacent to the X-axis guide cavity 101 and an upper hole portion 1223 away from the X-axis guide cavity 101. The hole diameter of the lower hole portion 1221 is smaller than the hole diameter of the upper hole portion 1223. It can be understood that when the gas bearing 30 is accommodated in the mounting space 1220, at least a part of it is located in the space of the lower hole portion 1221. Therefore, the hole diameter of the lower hole portion 1221 should be greater than the outer diameter of the gas bearing 30. The main mounting hole 122 further includes a pair of bearing platforms 1224 in the upper hole portion 1223, the main support plate 123 bridges the pair of bearing platforms 1224, and the gas bearing 30 is arranged on the main support plate 123.

[0044] It can be understood that a full cladding structure is formed by the main support plate 11, the outer vertical plate 12, the upper plate 13, and the lower plate 14. The gas bearing 30 on the outer vertical plate 12 is arranged in the main mounting hole 122 through the main support plate 123. On the one hand, when installing and fixing the gas bearing 30, the gas bearings 30 in the other three directions are installed first, and then the gas bearing 30 on the outer vertical plate 12 is installed. The gas bearing 30 on the outer vertical plate 12 is arranged in the mounting space 1220 through the main support plate 123. This installation form makes it easier to install and debug each gas bearing 30, simplifying the installation and debugging process. In practice, compared with the prior art, the installation and debugging time can be saved by more than 35%. On the other hand, this structure also forms a full cladding structure, has a large carrying capacity, and can ensure accuracy at the same time. In addition, this structure no longer uses a whole center support, greatly reducing the manufacturing cost.

[0045] Further, the outer vertical plate 12 is provided with an even number of main mounting holes 122, and a gas bearing 30 is arranged in each main mounting hole 122.

[0046] Further, the even number of gas bearings 30 are arranged in rows, i.e., a first row of gas bearings 30, a second row of gas bearings 30, and an Nth row of gas bearings 30, wherein the center points of the gas bearings 30 in each row are parallel to the X-axis direction, and the center points of the gas bearings 30 in adjacent rows are parallel to the Z-axis direction.

[0047] Further, X-axis drive holes 121 are arranged between the gas bearings 30 in the first row, and when a drive device including a drive roller is arranged on the enclosed slide system, the drive roller is accommodated in the X-axis drive hole 121 and abuts against the X-axis cross beam 100, and when the drive roller rotates, the enclosed slide system moves along the X-axis direction on the X-axis cross beam 100. It can be understood that the X-axis drive hole 121 should penetrate the thickness direction of the outer vertical plate 12 and make at least part of the X-axis cross beam 100 exposed through the X-axis drive hole 121.

[0048] Further, the gas bearings 30 arranged on the outer vertical plate 12 are four.

[0049] Further, the length direction of the main supporting plate 123 is parallel to the Z-axis direction.

[0050] Further, the height of the upper hole portion 1223 is greater than the thickness of the main supporting plate 123, and the main supporting plate 123 is located in the main mounting hole 122.

[0051] Further, the lower hole portion 1221 further includes a protruding portion 1222 for adjusting or accommodating a gas pipe or other device on the gas bearing 30.

[0052] Further, the lower plate 14 further includes a lower mounting hole 141, and a lower supporting plate 142 is arranged in the lower mounting hole 141, and a gas bearing 30 is arranged on the lower supporting plate 142, so that the lower gas bearing 30 is conveniently installed.

[0053] Further, the length direction of the lower supporting plate 142 is inclined to the X-axis direction, so that only a single gas bearing 30 can be used to achieve movement balance in each direction.

[0054] Further, the included angle between the length direction of the lower supporting plate 142 and the X-axis direction is 10-35°.

[0055] Further, the air floating bearings arranged on the upper plate 13 are at least two, and only a single air floating bearing is arranged on the lower plate 14, and the Z-axis main shaft comprises a middle axis, and the axis of the air floating bearing arranged on the lower plate 14 is parallel to the middle axis of the Z-axis main shaft.

[0056] The Z-axis guide seat 20 comprises a Z-axis guide cavity 201 formed by the Z-axis support plate 21, the Z-axis outer plate 22, the left side plate 23 and the right side plate 24, and the extending direction of the Z-axis guide cavity 201 is perpendicular to the extending direction of the X-axis guide cavity 101.

[0057] In the embodiment, the Z-axis support plate 21 is stacked on the main support plate 11, the Z-axis outer plate 22 is arranged in a spaced manner with the Z-axis support plate 21, the left side plate 23 and the right side plate 24 are arranged between the Z-axis support plate 21 and the Z-axis outer plate 22, and the adjacent plates among the Z-axis support plate 21, the Z-axis outer plate 22, the left side plate 23 and the right side plate 24 are arranged perpendicularly and form a "mouth" shape, the Z-axis guide cavity 201 is the space in the "mouth" shape, the Z-axis guide cavity 201 is used for accommodating the Z-axis main shaft 200, and the Z-axis guide cavity 201 comprises an extending direction, and the extending direction of the Z-axis guide cavity 201 is parallel to the Z-axis direction, and it can be understood that a full cladding structure is also formed by the Z-axis support plate 21, the Z-axis outer plate 22, the left side plate 23 and the right side plate 24.

[0058] Further, the Z-axis drive hole is arranged on the left side plate 23, when the Z-axis driving device is arranged on the closed slide system, the driving roller of the Z-axis driving device is accommodated in the Z-axis drive hole and abuts against the Z-axis main shaft 200, and the Z-axis main shaft 200 is driven to move along the Z-axis direction when the driving roller rotates.

[0059] The above description is only the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation by using the content of the specification and the drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A closed carriage system for use in a coordinate measuring machine, characterized in that, The application relates to a X-axis guiding seat and a Z-axis guiding seat. The outer vertical plate comprises a main mounting hole penetrating through the thickness direction of the outer vertical plate and a main supporting plate arranged in the main mounting hole. The main supporting plate and the main mounting hole form a mounting space, and a gas floating bearing is arranged in the mounting space. The mounting hole is a stepped hole comprising a lower hole part adjacent to the X-axis guiding cavity and an upper hole part far away from the X-axis guiding cavity.

2. The enclosed carriage system of claim 1, wherein, The main supporting plate and the lower hole part form the mounting space.

3. The enclosed carriage system of claim 2, wherein, The diameter of the lower hole part is smaller than that of the upper hole part.

4. The enclosed carriage system of claim 2, wherein, The upper hole part of the main mounting hole further comprises a pair of supporting platforms, and the main supporting plate is bridged on the pair of supporting platforms.

5. The enclosed carriage system of claim 2, wherein, The main mounting hole has an even number of main mounting holes, and a gas floating bearing is arranged in each main mounting hole.

6. The enclosed carriage system of claim 5, wherein, The even number of gas floating bearings are arranged in rows, and the center points of the gas floating bearings in each row are parallel to the X-axis direction.

7. The enclosed carriage system of claim 2, wherein, The center points of the corresponding gas floating bearings in adjacent rows are parallel to the Z-axis direction.

8. The enclosed carriage system of claim 7, wherein, X-axis driving holes are arranged between the first row of gas floating bearings.

9. The enclosed carriage system of claim 8, wherein, The X-axis driving holes penetrate through the thickness direction of the outer vertical plate and expose at least part of the X-axis cross beams.

10. The enclosed carriage system of claim 1, wherein, The lower plate further comprises a lower mounting hole, and a lower supporting plate is arranged in the lower mounting hole. A gas floating bearing is arranged on the lower supporting plate. The length direction of the lower supporting plate is inclined to the X-axis direction. The included angle between the length direction of the lower supporting plate and the X-axis direction is 10-35 degrees. The Z-axis supporting plate is stacked on the main supporting plate. The main supporting plate, the outer vertical plate, the upper plate and the lower plate are detachably arranged. The Z-axis supporting plate, the Z-axis outer plate, the left side plate and the right side plate are also detachably arranged.

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