Y-direction transmission mechanism of three-coordinate measuring machine

Abstract

The utility model discloses a Y-direction transmission mechanism of a three-coordinate measuring machine, comprising a sliding table assembly which comprises a sliding rail which is provided with a sliding chute, the sliding chute comprises a horizontal bottom surface and two inclined side surfaces which are respectively arranged at two sides of the horizontal bottom surface, and the included angle between the horizontal bottom surface and the inclined side surfaces is 45-70 degrees; the sliding table slides along the sliding rail, air flotation pieces are arranged on the two sides of the bottom of the sliding table respectively and comprise a first air flotation bearing and a second air flotation bearing, the first air flotation bearing corresponds to the horizontal bottom face, and the second air flotation bearing corresponds to the inclined side face. The Y-direction transmission mechanism of the three-coordinate measuring machine is compact and reasonable in overall layout; and the air floating piece can enable the sliding table to realize friction-free and vibration-free stable sliding, so that the measurement precision can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to three coordinate measuring machine technical field, concretely relates to a three coordinate measuring machine's Y direction transmission mechanism. BACKGROUND

[0002] Three coordinate measuring machine is widely used in machinery, electronics, instruments and plastic industries, three coordinate measuring machine is one of the most effective methods of measuring and obtaining size data, it can replace a variety of surface measuring tools and expensive combination gauge, and the time required for complex measurement tasks is reduced from hours to minutes, which is an effect that other instruments cannot achieve.

[0003] The transmission mechanism of the Y direction transmission mechanism of the existing three coordinate measuring machine usually has the following determination: the transmission structure is relatively complex, air floatation adjustment is difficult, and stable sliding and high-precision measurement cannot be realized. SUMMARY

[0004] The utility model discloses a three coordinate measuring machine's Y direction transmission mechanism can realize the stable movement of transmission mechanism, improve the measurement precision.

[0005] Therefore, the utility model provides a three coordinate measuring machine's Y direction transmission mechanism, including slide base assembly, it includes: slide rail, be equipped with the slide groove on the slide rail, the slide groove includes horizontal bottom and two inclined side that respectively set in the horizontal bottom both sides, the included angle of the horizontal bottom and the inclined side is 45 DEG-70 DEG, slide base, the slide base slides along the slide rail, the both sides of the bottom of the slide base are equipped with air float respectively, the air float includes first air float bearing and second air float bearing, the first air float bearing corresponds with the horizontal bottom, the second air float bearing corresponds with the inclined side.

[0006] Preferably, the slide rail includes a first slide rail, the top surface of the first slide rail is protrudingly fixed with two second slide rails arranged in parallel and spaced apart, and the top surface of the first slide rail and the two second slide rails enclose the slide groove.

[0007] Preferably, the slide base includes an upper slide base and a lower slide base, the two sides of the upper slide base are located on the top surfaces of the two second slide rails respectively, and the lower slide base extends from the bottom surface of the upper slide base into the slide groove.

[0008] Preferably, the air float includes a mounting seat, the first air float bearing and the second air float bearing are both mounted on the mounting seat, and the bottom surface of the lower slide base is provided with a groove, and the mounting seat is mounted in the groove.

[0009] Preferably, the included angle between the horizontal bottom and the inclined side is 60 DEG.

[0010] Preferably, the first air floating bearing is a rigid air floating bearing, and the second air floating bearing is an elastic air floating bearing.

[0011] Preferably, the transmission assembly further comprises a screw rod mounting base, a screw rod adjusting base and a screw rod, the screw rod mounting base is mounted on the end face of the slide rail, the screw rod adjusting base is mounted on the bottom face of the slide table, and the screw rod is mounted between the screw rod mounting base and the screw rod adjusting base.

[0012] Preferably, the height difference between the two ends of the screw rod is less than 2 mu m, and the difference between the distances between the screw rod and the two inclined side faces is less than 2 mu m.

[0013] Preferably, a screw nut is arranged on the screw rod, an end face of the slide table is provided with a screw rod connecting base, and the screw nut and the screw rod connecting base are connected through a plurality of elastic washers.

[0014] Preferably, the reading assembly further comprises a square ruler fixing base, a square ruler adjusting base and a square ruler rod, the square ruler fixing base and the square ruler adjusting base are mounted on the horizontal bottom face, and the square ruler rod is mounted between the square ruler fixing base and the square ruler adjusting base.

[0015] Compared with the prior art, the utility model has the advantages and positive effects that:

[0016] The first air floating bearing is a rigid air floating bearing, which can provide sufficient support for the slide table and ensure that excessive deformation or vibration does not occur during the movement of the slide table. The second air floating bearing is an elastic air floating bearing, which can absorb and reduce the influence of external disturbances on the slide table, improve the adaptability of the entire air floating member to environmental changes, and make the movement of the slide table more stable. In addition, by adjusting the pressure of the second air floating bearing, the air floating gap can be reduced to a minimum, so as to improve the dynamic response speed of the system, reduce the influence of mechanical vibration on the measurement result, and improve the precision and accuracy of the measurement. In summary, the air floating member of the embodiment can enable the slide table to slide smoothly without friction and vibration, and can improve the measurement precision.

[0017] The screw rod is mounted between the screw rod mounting base and the screw rod adjusting base, the screw rod mounting base and the screw rod adjusting base can facilitate the leveling of the screw rod, simplify the leveling operation, and improve the accuracy and convenience of leveling.

[0018] The screw nut and the screw rod connecting base are connected through a plurality of elastic washers, which can play an elastic connection role, can buffer and protect the screw rod, effectively reduce the wear of the screw rod, and eliminate the follow-up error between the screw rod and the slide table during sliding, thereby improving the stability and repeatability of the slide table sliding.

[0019] Other features and advantages of the present application will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of one embodiment of the three-coordinate measuring machine of the present application;

[0021] Figure 2 is a structural front view of one embodiment of the Y-direction transmission mechanism of the three-coordinate measuring machine of the present application;

[0022] Figure 3 is a structural front view of another embodiment of the Y-direction transmission mechanism of the three-coordinate measuring machine of the present application;

[0023] Figure 4 is a structural schematic view of one embodiment of the slide table of the present application;

[0024] Figure 5 is a structural schematic view of another embodiment of the Y-direction transmission mechanism of the three-coordinate measuring machine of the present application;

[0025] Figure 6 is a structural schematic view of another embodiment of the Y-direction transmission mechanism of the three-coordinate measuring machine of the present application;

[0026] Figure 7 is a structural schematic view of another embodiment of the Y-direction transmission mechanism of the three-coordinate measuring machine of the present application;

[0027] Figure 8 is a structural schematic view of another embodiment of the Y-direction transmission mechanism of the three-coordinate measuring machine of the present application.

[0028] REFERENCE NUMERALS:

[0029] chute 10, horizontal bottom surface 11, inclined side surface 12, first slide rail 13, second slide rail 14;

[0030] upper slide table 21, lower slide table 22, recess 23;

[0031] first air-floating bearing 31, second air-floating bearing 32, mounting seat 33;

[0032] screw rod 40, screw rod mounting seat 41, screw rod adjusting seat 42, motor 43, synchronous pulley reduction mechanism 44, screw nut 45,

[0033] screw rod connecting seat 46, elastic gasket 47, gasket plate 48;

[0034] square ruler fixing seat 51, square ruler adjusting seat 52, square ruler 53, reading head 54, grating ruler seat 55. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will combine with the drawings and examples, make further detailed description to the utility model.

[0036] As Figures 1-8 shown, some embodiments of the utility model propose a Y direction transmission mechanism of three coordinate measuring machine, Y direction transmission mechanism includes slide table assembly, transmission assembly and reading assembly, transmission assembly is used for driving slide table of slide table assembly to slide, slide table slides, and reading assembly carries out reading measurement.

[0037] Slide table assembly includes slide rail and slide table, and the slide table slides along the slide rail.

[0038] The slide rail is provided with a sliding groove 10, and the sliding groove 10 includes a horizontal bottom surface 11 and two inclined side surfaces 12 respectively arranged on both sides of the horizontal bottom surface 11, and the included angle between the horizontal bottom surface 11 and the inclined side surface 12 is 45°-70°. The slide table slides along the slide rail, and the two sides of the bottom of the slide table are respectively provided with air floaters, and the air floaters include first air float bearing 31 and second air float bearing 32, and the first air float bearing 31 corresponds to the horizontal bottom surface 11, and the second air float bearing 32 corresponds to the inclined side surface 12.

[0039] The slide rail includes a first slide rail 13, and the top surface of the first slide rail 13 is protrusively fixed with two parallel and spaced second slide rails 14; the top surface of the first slide rail 13 and the two second slide rails 14 enclose the sliding groove 10, and the top surface of the first slide rail 13 located in the sliding groove 10 is the horizontal bottom surface 11, and the corresponding side surface of the two second slide rails 14 is the inclined side surface 12.

[0040] In the embodiment, the first slide rail 13 and the second slide rail 14 are both made of marble, the first slide rail 13 is in the shape of a cuboid, and the cross-sectional shape of the second slide rail 14 is a right trapezoid, wherein the width of the upper base of the right trapezoid is greater than the width of the lower base; the two second slide rails 14 are arranged in parallel and at intervals along the length direction of the first slide rail 13, and the lower base of the second slide rail 14 is fixedly attached to the top surface of the first slide rail 13, and the fixing mode is a general mode in the technical field, which is not specifically limited herein.

[0041] The cross section of the slide table is T-shaped, and the slide table includes an upper slide table 21 and a lower slide table 22, which can be integrally formed or fixedly connected as an integral piece, which is not specifically limited herein.

[0042] The width of the upper slide table 21 is greater than the interval of the two second slide rails 14, and the two sides of the upper slide table 21 are located on the top surface (upper base surface) of the two second slide rails 14. The width of the lower slide table 22 is less than the interval of the two second slide rails 14, and the lower slide table 22 extends from the bottom surface of the upper slide table 21 to the sliding groove 10.

[0043] In this embodiment, the chute 10 is dovetail groove style, the lower sliding platform 22 and the air float are both located in the chute 10, which can avoid the lower sliding platform 22 and the air float exposed, can make the sliding platform assembly structure compact and simple, the overall layout is reasonable and compact; in addition, it can also effectively enhance the air float self-locking ability, effectively reduce the influence of external disturbance on the sliding platform, improve the adaptability of the whole air float to environmental changes, and make the movement of the sliding platform more stable.

[0044] The angle α between the horizontal bottom surface 11 and the inclined side surface 12 is 45°-70°, preferably, the angle α between the horizontal bottom surface 11 and the inclined side surface 12 is 60°, which can improve the adaptability of the whole air float to environmental changes, effectively reduce the influence of external disturbance on the sliding platform, and make the movement of the sliding platform more stable.

[0045] The air float includes a mounting seat 33, the first air float bearing 31 and the second air float bearing 32 are both mounted on the mounting seat 33, and the mounting mode can be the general mounting mode in the technical field, which is not limited here.

[0046] The bottom surface of the lower sliding platform 22 is provided with a groove 23, and the mounting seat 33 is fixedly installed in the groove 23. The mounting mode can be the general mounting mode in the technical field, which is not limited here. By providing the groove 23, the mounting seat 33 can be avoided to be installed, so as to avoid interference; in addition, the overall weight of the sliding platform can be reduced, and smooth and stable sliding of the sliding platform can be realized.

[0047] In this embodiment, the number of air floats can be even, and the even number of air floats are symmetrically distributed on both sides of the bottom surface of the lower sliding platform 22, which can help to realize smooth and stable sliding of the sliding platform.

[0048] The first air float bearing 31 corresponds to the horizontal bottom surface 11, and the first air float bearing 31 can generate an air gap between the bottom surface of the lower sliding platform 22 and the horizontal bottom surface 11; the first air float bearing 31 is a rigid air float bearing, which can provide sufficient support for the sliding platform to ensure that excessive deformation or vibration will not occur during the movement of the sliding platform. The second air float bearing 32 corresponds to the inclined side surface 12, and the second air float bearing 32 can generate an air gap between the sliding platform and the inclined side surface 12; the second air float bearing 32 is an elastic air float bearing, which can absorb and reduce the influence of external disturbance on the sliding platform, improve the adaptability of the whole air float to environmental changes, and make the movement of the sliding platform more stable. In addition, by adjusting the pressure of the second air float bearing 32, the air float gap can be reduced to a minimum, so as to improve the dynamic response speed of the system, reduce the influence of mechanical vibration on the measurement result, and improve the measurement precision and accuracy. In summary, the air float of the embodiment can make the sliding platform realize smooth and stable sliding without friction and vibration, and can improve the measurement precision.

[0049] The Y-direction transmission mechanism of the three-coordinate measuring machine of the embodiment further comprises a transmission assembly, which is used to drive the sliding table to slide.

[0050] Specifically, the transmission assembly comprises a lead screw 40, a lead screw mounting base 41 and a lead screw adjusting base 42. The lead screw mounting base 41 is mounted on the end face of the first sliding rail 13, and a motor 43 and a synchronous pulley speed reduction mechanism 44 are mounted on the lead screw mounting base 41. The motor 43 drives the lead screw 40 to rotate through the synchronous pulley speed reduction mechanism 44. The lead screw adjusting base 42 is mounted on the sliding table, and the lead screw 40 is arranged between the lead screw mounting base 41 and the lead screw adjusting base 42. The lead screw 40 is engaged with a lead nut 45, and the lead nut 45 is fixedly connected to the sliding table. Through the engagement of the lead screw 40 and the lead nut 45, the rotary motion of the lead screw 40 is converted into the linear motion of the lead nut 45, and the lead nut 45 drives the sliding table to slide along the sliding groove 10.

[0051] The lead screw mounting base 41 can be mounted on the end face of the first sliding rail 13 through screws, and the lead screw adjusting base 42 can be mounted on the sliding table through screws. Through screw mounting, installation and disassembly can be facilitated, which is simple and efficient.

[0052] In the embodiment, the lead screw 40 is mounted between the lead screw mounting base 41 and the lead screw adjusting base 42. Through the lead screw mounting base 41 and the lead screw adjusting base 42, the leveling of the lead screw 40 can be facilitated, the leveling operation can be simplified, and the accuracy and convenience of leveling can be improved.

[0053] Firstly, the lead screw 40 can be coarsely leveled by adjusting the mounting position of the lead screw mounting base 41. Then, the lead screw 40 can be finely leveled by adjusting the mounting position of the lead screw adjusting base 42 until the lead screw 40 is leveled to an ideal state.

[0054] Specifically, the height difference between the two ends of the lead screw 40 is less than 2μm, and the difference between the distances of the lead screw 40 and the two inclined side surfaces 12 is less than 2μm. The lead screw 40 can be leveled to an ideal state, thereby improving the stability of the sliding table sliding and improving the measurement accuracy.

[0055] The end face of the sliding table is provided with a lead screw connecting base 46, and the lead nut 45 and the lead screw connecting base 46 are connected through a plurality of elastic washers 47.

[0056] In the embodiment, the sliding table end face is fixedly connected with a backing plate 48, and the lead screw connecting base 46 is fixedly connected to the backing plate 48, so that the lead screw connecting base 46 can be fixedly connected to the sliding table.

[0057] In the high-speed scanning measurement process, the measuring machine frequently starts and stops, which will cause abrasion of the screw rod 40, and the damage to the screw rod 40 is irreversible. The plurality of elastic washers 47 are connected between the screw nut 45 and the screw rod connecting seat 46, which can play the role of elastic connection, can buffer the screw rod 40, effectively reduce the abrasion of the screw rod 40; in addition, the follow-up error between the screw rod 40 and the sliding table in the sliding process can be eliminated, and the stability and repeatability of the sliding table sliding are improved.

[0058] The number of spring washers 47 can be multiple, for example, 2, 3, 4 or more, which is not specifically limited here. The plurality of spring washers 47 are stacked with each other, which can reduce the deformation amount of a single one, increase the stability in the long-term deformation process, and play a more effective buffering protection role.

[0059] The Y-direction transmission mechanism of the three-coordinate measuring machine of the embodiment further comprises a reading assembly, the reading assembly comprises a square ruler fixed seat 51, a square ruler adjusting seat 52 and a square ruler rod 53, the square ruler fixed seat 51 and the square ruler adjusting seat 52 are installed on the horizontal bottom surface 11, the square ruler rod 53 is installed between the square ruler fixed seat 51 and the square ruler adjusting seat 52, the square ruler rod 53 is parallel to the screw rod 40, and the square ruler rod 53 is provided with a reading head 54 and a grating ruler seat 55.

[0060] The height difference between the two ends of the square ruler rod 53 is less than 10 μm, which can effectively improve the measurement accuracy and the measurement stability.

[0061] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. A Y-direction drive mechanism of a three-coordinate measuring machine, characterized by, The Y-direction transmission mechanism of the three-coordinate measuring machine comprises a sliding table assembly, which comprises: a sliding rail, wherein a sliding groove is arranged on the sliding rail, the sliding groove comprises a horizontal bottom surface and two inclined side surfaces arranged on both sides of the horizontal bottom surface respectively, and the included angle between the horizontal bottom surface and the inclined side surfaces is 45°-70°; a sliding table, wherein the sliding table slides along the sliding rail, and air floats are arranged on both sides of the bottom of the sliding table respectively, the air floats comprise a first air float bearing and a second air float bearing, the first air float bearing corresponds to the horizontal bottom surface, and the second air float bearing corresponds to the inclined side surface.

2. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 1, wherein the sliding rail comprises a first sliding rail, a top surface of the first sliding rail is provided with two second sliding rails arranged in parallel and at intervals, and the top surface of the first sliding rail and the two second sliding rails enclose the sliding groove.

3. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 2, wherein the sliding table comprises an upper sliding table and a lower sliding table, both sides of the upper sliding table are located on the top surfaces of the two second sliding rails respectively, and the lower sliding table extends from the bottom surface of the upper sliding table into the sliding groove.

4. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 3, wherein the air floats comprise a mounting seat, and the first air float bearing and the second air float bearing are both mounted on the mounting seat; a bottom surface of the lower sliding table is provided with a groove, and the mounting seat is mounted in the groove.

5. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 1, wherein the included angle between the horizontal bottom surface and the inclined side surfaces is 60°.

6. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 1, wherein the first air float bearing is a rigid air float bearing, and the second air float bearing is an elastic air float bearing.

7. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 1, further comprising a transmission assembly, wherein the transmission assembly comprises a lead screw mounting seat, a lead screw adjusting seat and a lead screw, the lead screw mounting seat is mounted on the end surface of the sliding rail, the lead screw adjusting seat is mounted on the bottom of the sliding table, and the lead screw is mounted between the lead screw mounting seat and the lead screw adjusting seat.

8. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 7, wherein the height difference between the two ends of the lead screw is less than 2μm, and the difference between the distances between the lead screw and the two inclined side surfaces is less than 2μm.

9. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 7, wherein a lead screw nut is arranged on the lead screw, an end surface of the sliding table is provided with a lead screw connecting seat, and the lead screw nut and the lead screw connecting seat are connected through a plurality of elastic washers.

10. The Y-direction transmission mechanism of the three-coordinate measuring machine according to claim 1, further comprising a reading assembly, wherein the reading assembly comprises a square ruler fixing seat, a square ruler adjusting seat and a square ruler rod, the square ruler fixing seat and the square ruler adjusting seat are mounted on the horizontal bottom surface, and the square ruler rod is mounted between the square ruler fixing seat and the square ruler adjusting seat. ​ ​

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