Reading head mounting and gantry drive mechanism

Abstract

The utility model provides a kind of reading head mounting rack and gantry driving mechanism, including fixed part;Floating part, slidingly installed in the fixed part, for assembling magnetoelectric pick-up head, the direction that the floating part is defined relative to the fixed part sliding is first direction;Spring, between the fixed part and the floating part, the direction of force that the spring exerts to the floating part is parallel with the first direction;Cam follower, rotationally installed in the floating part, the rotation axis of the cam follower is perpendicular to the first direction.The utility model when using, when the uneven installation structure of magnetoelectric scale causes magnetoelectric scale protrusion or recess, magnetoelectric pick-up head at this position can follow the uneven modeling of the installation structure of magnetoelectric scale floating, so as to ensure the clearance between magnetoelectric pick-up head and magnetoelectric scale constant, ensure accuracy.

Description

Technical Field

[0001] This utility model relates to the field of magnetic grating reading head assembly technology, and in particular to a reading head mounting bracket and a gantry drive mechanism. Background Technology

[0002] When magnetic grating reading heads and magnetic grating rulers are used together, the gap between them must remain constant. However, during the assembly process of the magnetic grating ruler, due to manufacturing errors in the installation position structure, the different areas of the side of the magnetic grating ruler facing the magnetic grating reading head are not completely in the same plane. In other words, the side of the magnetic grating ruler facing the magnetic grating reading head cannot form a plane due to the installation position structure. Therefore, as the magnetic grating reading head moves along the length of the magnetic grating ruler, the gap between the magnetic grating reading head and the magnetic grating ruler cannot be effectively maintained constant, which can easily lead to inaccurate measurement data. Utility Model Content

[0003] To address the shortcomings of existing technologies, the first objective of this utility model is to provide a reading head mounting bracket that ensures a constant gap between the magnetic grating reading head and the magnetic grating ruler, thereby guaranteeing accuracy.

[0004] The second objective of this invention is to provide a reading head mounting bracket that ensures that the rotation of the motor is consistent with the displacement of the adjusting beam.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A reading head mounting bracket includes: a fixed part; a floating part slidably mounted on the fixed part for assembling a magnetic grating reading head, wherein the sliding direction of the floating part relative to the fixed part is defined as a first direction; a spring disposed between the fixed part and the floating part, wherein the direction of the force exerted by the spring on the floating part is parallel to the first direction; and a cam follower rotatably mounted on the floating part, wherein the rotation axis of the cam follower is perpendicular to the first direction. With this configuration, when the mounting structure of the magnetic grating ruler is uneven, causing the magnetic grating ruler to bulge or dent, the magnetic grating reading head will float at that position following the uneven shape of the mounting structure, thereby ensuring a constant gap between the magnetic grating reading head and the magnetic grating ruler and guaranteeing accuracy.

[0007] According to a preferred embodiment, the fixing part includes an upper base plate and an upper upright plate, the upper base plate being disposed at the lower end of the upper upright plate; the floating part includes a lower base plate and a lower upright plate, the lower base plate being disposed at the upper end of the lower upright plate, a first stop being disposed on the side of the upper base plate away from the cam follower, and the spring being disposed between the lower base plate and the first stop.

[0008] According to a preferred embodiment, the lower base plate has an assembly groove on the side away from the cam follower, and an assembly hole is formed at the bottom of the assembly groove. The spring is embedded in the assembly hole, and the first stop can be embedded in the assembly groove.

[0009] According to a preferred embodiment, the upper base plate and the lower base plate are slidably connected by a cross roller platform. A second stop is mounted on the upper base plate, and the second stop is disposed opposite to the first stop. The cross roller platform is located between the first stop and the second stop.

[0010] According to a preferred embodiment, the lower plate is equipped with a first mounting block and a second mounting block, the first mounting block being located between the second mounting block and the lower base plate, the first mounting block being used to assemble the magnetic grating reading head, and the second mounting block being used to assemble the cam follower.

[0011] According to a preferred embodiment, the reading head mounting bracket further includes a protective cover, the protective cover including a protective part and a folding part, the folding part being disposed on the periphery of the protective part, the protective part being located on the lower side of the second mounting block, and the folding part extending to the periphery or upper side of the second mounting block; the magnetic grating reading head and the cam follower are located on the same side of the lower upright plate.

[0012] A gantry drive mechanism includes an adjusting beam, two gantry beams, and a reading head mounting bracket. The adjusting beam is located between the two gantry beams and is slidably connected to them. The reading head mounting bracket is mounted on the adjusting beam. A magnetic scale is mounted on each gantry beam, and a magnetic scale reading head matching the magnetic scale is mounted on the reading head mounting bracket. The magnetic scale is mounted on the gantry beam via a magnetic scale mounting plate, and a cam follower rolls against the magnetic scale mounting plate. During the movement of the adjusting beam relative to the gantry beams under motor drive, the magnetic scale reading head can float synchronously according to the flatness of the magnetic scale mounting plate, thereby ensuring the stability of the gap between the magnetic scale reading head and the magnetic scale, ensuring that the motor rotation and the adjusting beam displacement are consistent, and improving the accuracy of the gantry drive mechanism. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1A schematic diagram of the assembly structure of the magnetic grating reading head and the reading head mounting frame provided in an embodiment of this utility model;

[0015] Figure 2 for Figure 1 Explosion diagram after the upper slab of the structure has been removed;

[0016] Figure 3 A three-dimensional structural schematic diagram of the gantry drive mechanism provided in an embodiment of this utility model;

[0017] Figure 4 A schematic diagram of the assembly structure of the adjusting beam and the gantry beam provided in an embodiment of this utility model;

[0018] Figure 5 A schematic diagram of the assembly structure of the gantry beam, adjusting beam, and reading head mounting frame provided in this embodiment of the utility model;

[0019] Figure 6 A schematic diagram of the assembly structure of the gantry beam and reading head mounting bracket provided in this embodiment of the utility model.

[0020] Icons: 1. Reading head mounting bracket; 11. Fixing part; 111. Upper upright plate; 112. Upper base plate; 1121. First stop block; 1122. Second stop block; 12. Floating part; 121. Lower base plate; 1211. Assembly slot; 122. Lower upright plate; 1221. First mounting block; 1222. Second mounting block; 13. Magnetic grating reading head; 14. Cam follower; 15. Spring; 16. Cross roller platform; 17. Protective cover; 171. Protective part; 172. Folding part; 2. Adjusting beam; 3. Gantry beam; 31. Magnetic grating mounting plate; 311. Magnetic grating ruler; 32. Motor; 33. Rack; X, First direction; Y, Second direction. Detailed Implementation

[0021] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Please refer to Figure 1 and Figure 2 A reading head mounting bracket includes a fixed part 11, a floating part 12, a spring 15, and a cam follower 14. The floating part 12 is slidably mounted on the fixed part 11 and is used to assemble a magnetic grating reading head 13. The direction in which the floating part 12 slides relative to the fixed part 11 is defined as a first direction X. The spring 15 is disposed between the fixed part 11 and the floating part 12, and the direction of the force exerted by the spring 15 on the floating part 12 is parallel to the first direction X. The cam follower 14 is rotatably mounted on the floating part 12, and the axis of rotation of the cam follower 14 is perpendicular to the first direction X. With this configuration, during use, the cam follower 14 abuts against the mounting structure of the magnetic grating ruler 311 in real time, and under the action of the spring 15, the floating part 12 floats relative to the fixed part 11, thereby allowing the cam follower 14 and the magnetic grating reading head 13 to float. Along the length of the magnetic scale 311, the cam follower 14 moves synchronously with the magnetic scale reading head 13. Therefore, during this process, when the mounting structure of the magnetic scale 311 is uneven, causing the magnetic scale 311 to bulge or dent, the magnetic scale reading head 13 will float at that position following the uneven shape of the mounting structure of the magnetic scale 311, thereby ensuring that the gap between the magnetic scale reading head 13 and the magnetic scale 311 is constant and ensuring accuracy.

[0025] like Figure 1 and Figure 2 As shown, the fixing part 11 includes an upper base plate 112 and an upper upright plate 111, with the upper base plate 112 disposed at the lower end of the upper upright plate 111; the floating part 12 includes a lower base plate 121 and a lower upright plate 122, with the lower base plate 121 disposed at the upper end of the lower upright plate 122. A first stop 1121 is provided on the side of the upper base plate 112 away from the cam follower 14, and a spring 15 is disposed between the lower base plate 121 and the first stop 1121. Here, the first stop 1121 is used to cooperate with the lower base plate 121 to limit the spring 15.

[0026] Furthermore, the upper base plate 112 and the lower base plate 121 are slidably connected by a cross roller platform 16. A second stop 1122 is mounted on the upper base plate 112, and the second stop 1122 is positioned opposite to the first stop 1121. The cross roller platform 16 is located between the first stop 1121 and the second stop 1122. Figure 1 and Figure 2As shown, it can be understood that the slider part of the cross roller platform 16 is fixedly connected to the upper base plate 112, and the slide rail part of the cross roller platform 16 is fixedly connected to the lower base plate 121. That is, the lower base plate 121 is located between the first stop 1121 and the second stop 1122 in the first direction X. Therefore, the first stop 1121 and the second stop 1122 cooperate to limit the movement range of the floating part 12 in the first direction X.

[0027] like Figure 2 As shown, a mounting groove 1211 is provided on the side of the lower base plate 121 away from the cam follower 14. A mounting hole (not shown) is provided at the bottom of the mounting groove 1211. The spring 15 is embedded in the mounting hole, and the first stop block 1121 can be embedded in the mounting groove 1211. The mounting groove 1211, in conjunction with the first stop block 1121, can reduce the size of the reading head mounting bracket 1 in the first direction X. In some embodiments, the first stop block 1121 can also be provided with a mounting hole, thereby improving the stability of the spring 15 installation.

[0028] The lower plate 122 is equipped with a first mounting block 1221 and a second mounting block 1222. The first mounting block 1221 is located between the second mounting block 1222 and the lower base plate 121. The first mounting block 1221 is used to mount the magnetic grating reading head 13, and the second mounting block 1222 is used to mount the cam follower 14.

[0029] In this embodiment, the reading head mounting bracket 1 further includes a protective cover 17, which includes a protective part 171 and a folding part 172. The folding part 172 is disposed on the periphery of the protective part 171, and the protective part 171 is located on the lower side of the second mounting block 1222. The folding part 172 extends to the periphery or upper side of the second mounting block 1222. The magnetic grating reading head 13 and the cam follower 14 are located on the same side of the lower upright plate 122. The protective part 171 and the folding part 172 are integrally stamped to prevent the cam follower 14 from falling.

[0030] like Figures 3 to 6As shown, a gantry drive mechanism includes an adjusting beam 2, two gantry beams 3, and the aforementioned reading head mounting bracket 1. The adjusting beam 2 is located between the two gantry beams 3 and is slidably connected to them. The reading head mounting bracket 1 is mounted on the adjusting beam 2. A magnetic scale 311 is mounted on the gantry beam 3, and a magnetic scale reading head 13 matching the magnetic scale 311 is mounted on the reading head mounting bracket 1. The magnetic scale 311 is mounted on the gantry beam 3 via a magnetic scale mounting plate 31, and a cam follower 14 rolls against the magnetic scale mounting plate 31. In this embodiment, the adjusting beam 2 is connected to the gantry beam 3 via a slide rail slider assembly. The extension direction of the adjusting beam 2 is parallel to the first direction X. The extension direction of the gantry beam 3 is defined as the second direction Y, which is perpendicular to the first direction X. Both the second direction Y and the first direction X are parallel to the ground. The adjusting beam 2 slides relative to the gantry beam 3 along the second direction Y. It should be noted that both the magnetic scale mounting plate 31 and the magnetic scale 311 extend along the second direction Y. The magnetic grating mounting plate 31 here is the same mounting structure as the magnetic grating ruler 311 mentioned earlier. Specifically, as follows... Figure 5 and Figure 6 As shown. In some embodiments, the adjusting beam 2 is driven by a cylinder (not shown) or an electric actuator (not shown) mounted on the gantry beam 3. In another embodiment, a rack 33 extending along the second direction Y is mounted on the gantry beam 3, and a motor 32 is mounted on the adjusting beam 2. A gear (not shown) meshing with the rack 33 is driven through the output shaft of the motor 32, thereby driving the adjusting beam 2 by the motor 32 driving the gear and the rack 33 to mesh. More specifically, the fixing part 11 is detachably mounted on the adjusting beam 2 by bolts or screws. During use, specifically, as the adjusting beam 2 moves relative to the gantry beam 3 under the drive of the motor 32, the magnetic grating reading head 13 can float synchronously according to the flatness of the magnetic grating mounting plate 31, thereby ensuring the stability of the gap value between the magnetic grating reading head 13 and the magnetic grating ruler 311, ensuring that the rotation amount of the motor 32 is consistent with the displacement amount of the adjusting beam 2, and improving the accuracy of the gantry drive mechanism.

[0031] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A reading head mounting bracket, characterized in that, include: Fixing part; A floating part is slidably mounted on the fixed part and is used to assemble a magnetic grating reading head. The direction in which the floating part slides relative to the fixed part is defined as a first direction. A spring is disposed between the fixed part and the floating part, and the direction of the force exerted by the spring on the floating part is parallel to the first direction. A cam follower is rotatably mounted on the floating part, and the axis of rotation of the cam follower is perpendicular to the first direction.

2. The reading head mounting bracket according to claim 1, characterized in that, The fixing part includes an upper base plate and an upper upright plate, wherein the upper base plate is disposed at the lower end of the upper upright plate; The floating part includes a lower base plate and a lower upright plate. The lower base plate is disposed at the upper end of the lower upright plate. A first stop is disposed on the side of the upper base plate away from the cam follower. The spring is disposed between the lower base plate and the first stop.

3. The reading head mounting bracket according to claim 2, characterized in that, The lower base plate has an assembly groove on the side away from the cam follower, and an assembly hole is provided at the bottom of the assembly groove. The spring is embedded in the assembly hole, and the first stop block can be embedded in the assembly groove.

4. The reading head mounting bracket according to claim 2, characterized in that, The upper base plate and the lower base plate are slidably connected by a cross roller platform. A second stop is mounted on the upper base plate, which is disposed opposite to the first stop. The cross roller platform is located between the first stop and the second stop.

5. The reading head mounting bracket according to claim 2, characterized in that, The lower plate is equipped with a first mounting block and a second mounting block. The first mounting block is located between the second mounting block and the lower base plate. The first mounting block is used to assemble the magnetic grating reading head, and the second mounting block is used to assemble the cam follower.

6. The reading head mounting bracket according to claim 5, characterized in that, The reading head mounting bracket also includes a protective cover, which includes a protective part and a folding part. The folding part is disposed on the periphery of the protective part, the protective part is located on the lower side of the second mounting block, and the folding part extends to the periphery or upper side of the second mounting block. The magnetic grating reading head and the cam follower are located on the same side of the lower plate.

7. A gantry drive mechanism, characterized in that, The device includes an adjusting beam, two gantry beams, and a reading head mounting bracket as described in any one of claims 1-6. The adjusting beam is located between the two gantry beams and is slidably connected to the gantry beams. The reading head mounting bracket is mounted on the adjusting beam. A magnetic scale is mounted on the gantry beams. A magnetic scale reading head matching the magnetic scale is mounted on the reading head mounting bracket. The magnetic scale is mounted on the gantry beam via a magnetic scale mounting plate, and the cam follower rolls against the magnetic scale mounting plate.

Images