TWI433752B - Positioning platform - Google Patents

Description

Alignment platform

The invention relates to a aligning platform.

The conventional alignment platform can be referred to the TWM400904 patent, which uses multiple sets of mobile unit to drive the platform to move, and each group of mobile units can use the screw to rotate and drive the platform to reciprocate along the screw, wherein, due to processing errors and assembly If necessary, there is an unremovable gap between the screw and the screw hole of the matching screw, and the precision of the positioning and positioning of the alignment platform is reduced.

In more detail, when the screw drives the platform to reciprocate, the position of the gap relative to the screw may change due to the reverse feed of the screw, thereby changing the position of the platform or not actually moving to a predetermined position, so that the platform is not It is accurately moved to the predetermined position.

In addition to the above reasons, even if the user uses one of the mobile units to move the platform to a precise position in a certain direction, after the user further operates another set of mobile units, two or more sets of mobile units will interfere with each other, so that The position of the gap changes again, which shifts the original accurate position and reduces the accuracy of positioning.

The main object of the present invention is to provide a aligning platform capable of having a more accurate mobile positioning capability and providing an accurate alignment effect.

To achieve the above object, the present invention provides a aligning platform comprising a base, three mobile devices and a work station.

Each of the moving devices includes a fixing portion, a movable portion and a pushing mechanism, each of the fixing portions has a screw, each of the fixing portions is fixed to the base, and each of the movable portions has a screw hole, and each of the moving devices has a screw hole The movable portion is screwed with the corresponding screw, and each of the fixed portions can drive the respective screws to rotate, so that the movable portions are respectively translated along the corresponding screws, and each of the pushing mechanisms applies force to each of the movable portions, so that the movable portions are respectively Abutting each of the screws toward one end of each of the screws, the screws are not parallel to each other, and the other screw is parallel to one of the screws. The workbench is disposed on the movable parts, and each of the movable parts drives the worktable to move or rotate.

Therefore, the present invention can push the movable portion and the fixed portion by the pushing mechanism to maintain the gap between the screw and the movable portion at a fixed position, and remove the influence of the gap on the position or the moving position of the table, and greatly improve the pair. The accuracy of the use of the platform, and the improved use of the alignment.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIG. 1, the present invention provides an alignment platform including a base 1, three mobile devices 2, 3, 4 and a work table 5.

The moving devices 2, 3, and 4 are disposed between the base 1 and the table 5 for controlling the movement of the table 5 relative to the base 1 so as to accurately position the workpiece to be processed. It is fixed on the table 5 to further carry out precise machining operations. The base 1 is provided for the mobile devices 2, 3, 4. Preferably, the base 1 has three active slide rails 11.

Referring to FIG. 2 to FIG. 4, the foregoing mobile device 2 includes a fixing portion 21, a movable portion 22 and a pushing mechanism.

As shown in FIG. 1 , the fixing portion 21 is fixed to the base 1 and has a screw 211 . The fixing portion 21 can drive the screw 211 to rotate. More specifically, the fixing portion 21 includes a screw 211 and a fixing base 212 . And a power portion 213, the fixing base 212 is fixed to the base 1. The screw 211 is disposed on the fixing base 212, and is rotatable relative to the fixing base 212 about the axis of the screw 211. The power portion 213 is fixed to the base portion 213. The fixing base 212 is coupled to the screw 211 so that the power portion 213 can drive the screw 211 to rotate. More specifically, the power portion may include a motor, a servo and a speed reducing mechanism. The fixing portion 21 further includes two screws 214. Preferably, the two screws 214 are screwed and fixed to the fixing base 212.

The movable portion 22 has a screw hole 221, and the movable portion 22 is screwed with the screw 211, so that when the screw 211 rotates, the movable portion 22 will translate along the screw 211. More specifically, the movable portion 22 can be borrowed. The slide portion 222 is slidably disposed on one of the active slide rails 11 so that the movable portion 22 can only slide along the active slide rail 11 , and the active slide rail 11 is parallel with the screw 211 , so that the screw 211 can be rotated. The movable portion 22 is driven to slide. The movable portion 22 can include a portion 223 and a combination block 224. The seat portion 223 is fixed to the slider 222. The combination block 224 is fixed to the seat portion 223. The hole 221 is provided with a through hole 225 which is coaxial with the screw hole 221 and is slightly larger. Therefore, the present invention can provide a relatively precise thread on the screw hole 221 of the combination block 224 for the screw 211 to be screwed. The combination block 224 can have a relatively simple shape and contour, and can be easily fabricated. The movable portion 22 can further include two latches 226. The movable portion 22 additionally defines two positioning holes 227 and two insertion holes 228. More specifically, the two positioning holes 227 and the two insertion holes 228 are located at the seat portion 223. The two positioning holes 227 are parallel to the screw 211, and the two insertion holes 228 are laterally communicated with one of the positioning holes 227, respectively.

The pushing mechanism applies a force to the movable portion 22 to push the movable portion 22 along the screw 211 toward one end of the screw 211. More specifically, the pushing mechanism includes two elastic members 231, each of the elastic members. The 231 can be disposed as a spring. The two elastic members 231 are respectively inserted into one of the positioning holes 227, and the two pins 226 are respectively inserted into one of the insertion holes 228 and one of the elastic members 231, so that one end of the two elastic members 231 They are respectively fixed to the movable portion 22. The other ends of the two elastic members 231 are respectively sleeved on one of the screws 214 so that the two elastic members 231 are also fixed to the fixing portion 21 at the same time. Further, the two elastic members 231 are pre-stretched, so that the elastic member 231 can pull the movable portion 22 along the screw 211 toward the fixing portion 21, however, in other possible embodiments of the present invention, the The two elastic members 231 are pre-compressed so that the movable portion 22 is pushed toward the side away from the fixed portion 21 along the screw 211. In the preferred embodiment of the present invention, the two positioning holes 227 are respectively located at two sides of the screw hole 221, so that the two elastic members 231 are juxtaposed on both sides of the screw 211, and can be evenly pushed against the movable portion by the elastic member 231. twenty two.

In the present invention, three sets of mobile devices 2, 3, 4 may be provided. For example, only one of the mobile devices 2 is taken as an example for convenience of explanation, and the other two sets of mobile devices 3, 4 may have the same or similar structure. Wherein, two of the screws in the moving devices 2, 3, 4 are not parallel to each other, preferably perpendicular to each other, and the other screw is parallel to one of the screws, as shown in FIG. 2, 3, 4 can arbitrarily move the table 5 horizontally, and when the parallel screws are actuated in the opposite direction, the table 5 can be driven to rotate.

The worktable 5 is disposed on the movable portion 22 of each mobile device, so that the movable portion 22 moves or rotates when the movable portion 22 moves, wherein the work table 5 can further include three sets of passive sliders 51 and three sets of rotating sliders. 52. Each of the passive sliders 51 is slidably disposed on one of the movable portions 22, and more specifically, is slidably disposed on the seat portion 223, and the slidable directions are respectively perpendicular to the moving direction of the movable portion 22, which is The rotating sliders 52 are rotatably disposed on the passive slider 51, and when the movable portions of the moving devices 2, 3, and 4 are moved, the table 5 can be smoothly moved or rotated.

With reference to FIG. 5, the movable portion 22 is pushed by the pushing mechanism, and is pushed toward the one end of the screw 211 along the screw 211, so that the gap in the screw hole 221 is held by the movable portion 22. When the screw 211 moves the movable portion 22 on the other side of the abutting direction, the movable portion 22 can be accurately positioned by the number of rotations or the rotation angle of the screw 211. Referring to FIG. 1, when the three groups of mobile devices 2, 3, 4 When moving at the same time, the position and moving distance of each movable part can be maintained at the exact target position and distance value at any time, and the moving distance or position of the worktable 5 can be accurately positioned at any time without appearing because of the reverse The resulting positioning error greatly improves the precision and precision of the machining.

According to the above, in the conventional alignment platform, since the movable parts of the respective mobile devices are prone to the problem of inaccurate positioning, the positioning errors of the respective moving parts are different, and even interference may occur due to the movement of one of the moving parts. The position of other active parts is slightly offset, and the complex and complicated positioning error of the worktable can not be corrected by numerical calculation. However, all active parts must be moved to the position at the same time to reduce the error. Therefore, it is difficult for the conventional alignment platform to further improve the positioning accuracy. For this reason, the alignment platform provided by the present invention can move each movable part to an exact predetermined position, and even if one of the movable parts moves, it is not easy to Interference occurs in other active parts, and the positioning can be accurately performed, and the worktable can be maintained in an exact position, which further improves the precision and accuracy of the processing, and has a high process value.

Secondly, the present invention can further insert the elastic member in the pushing mechanism into the positioning hole, and maintain the force of the spring pushing in a predetermined direction, thereby further improving the precision of the use of the present invention.

Furthermore, in the present invention, the two elastic members 231 can be symmetrically arranged on both sides of the screw 211, so that the screw 211 and the screw hole 221 can be further uniformly and stably combined, thereby further improving the accuracy of the present invention.

In summary, the invention greatly improves the positioning accuracy of the alignment platform, and can reduce the error in the processing of the workpiece, and breaks through the bottleneck of the processing precision in the conventional processing, which is a progressive effect and conforms to the provisions of the national patent law. The patent requirements, the patent application is filed according to law, and the Office of the Department of Health is required to approve the patent as soon as possible.

1. . . Base

11. . . Active rail

2. . . Mobile device

twenty one. . . Fixed part

211. . . Screw

212. . . Fixed seat

213. . . Power department

214. . . Screw firmware

twenty two. . . Activities section

221. . . Screw hole

222. . . Slider

223. . . Seat

224. . . Combination block

225. . . perforation

226. . . plug

227. . . Positioning hole

228. . . Jack

231. . . Elastic part

3. . . Mobile device

4. . . Mobile device

5. . . Workbench

51. . . Passive slider

52. . . Rotate the slider

Figure 1 is a perspective view of the present invention.

2 is an exploded perspective view of the mobile device of the present invention.

Figure 3 is a side elevational view of the mobile device of the present invention.

Figure 4 is a plan view of the mobile device of the present invention.

Figure 5 is an enlarged cross-sectional view showing a screw and a screw hole in the present invention.

1. . . Base

11. . . Active rail

2. . . Mobile device

211. . . Screw

231. . . Elastic part

3. . . Mobile device

4. . . Mobile device

5. . . Workbench

Claims (8)

A aligning platform includes: a base; three moving devices, each of the moving devices includes a fixing portion, a movable portion and a pushing mechanism, each of the fixing portions has a screw, and each fixing portion is fixed on the base. Each of the movable portions has a screw hole, and the movable portion of each of the moving devices is screwed with a corresponding screw, and each of the fixed portions can drive the respective screws to rotate, so that the movable portions are respectively translated along the corresponding screws, and each of the movable portions is pushed One end of the mechanism is fixed to the corresponding fixing portion and the other end is fixed to the corresponding movable portion, and each pushing mechanism applies a force to each of the movable portions, so that each movable portion is pushed along one end of each screw to each screw of the screw The two screws are not parallel to each other, and the other screw is parallel to one of the screws; a table is disposed on the movable portions, and each movable portion moves the table to move or rotate. The alignment platform of claim 1, wherein each of the pushing mechanisms is a two elastic member, and one end of each elastic member is fixed to the corresponding fixing portion, and the other end is fixed to the corresponding movable portion. The alignment platform of claim 2, wherein the movable portion further comprises two latches, the movable portion forming two positioning holes and two jacks, wherein the two jacks respectively communicate with one of the positioning holes, and the two elastic members are respectively inserted The two latches are respectively inserted into one of the insertion holes and one of the elastic members, so that the two elastic members are respectively fixed to the movable portion. The elastic member of each of the pushing mechanisms is pre-pulled according to the alignment platform described in claim 2 Stretching, the elastic members of each of the pushing mechanisms are pulled against the corresponding movable portions and pushed against the corresponding fixing portions. In the alignment platform according to claim 3, the elastic members of each of the pushing mechanisms are pre-stretched, so that the elastic members of the pushing mechanisms pull the corresponding movable portions to the corresponding fixing portions. In the alignment platform according to any one of claims 2 to 5, the elastic members in each of the moving devices are juxtaposed on both sides of the corresponding screw. The alignment platform according to any one of claims 1 to 5, wherein the base has three active slide rails, and the movable portions are respectively slidably disposed on one of the active slide rails, and the active slide rails are respectively coupled to one of the screw rails parallel. The alignment platform of claim 6, wherein the base has three active slide rails, and the movable portions are respectively slidably disposed on one of the active slide rails, and the active slide rails are respectively parallel with one of the screws.