JPS59151658A - Rectilinear moving device - Google Patents

Abstract

PURPOSE:To obtain the stable linear movement of a carriage slidably moved along a guide, by coupling between a nut threadedly engaged with a feed screw and the carriage with the use of a magnetically coupling means. CONSTITUTION:A first magnetic catch 6 which has an absorbing surface 7 perpendicular to the axial direction of a feed screw 4, is attached to a nut 5, and is magnetically coupled, closely to an absorbing plate 10 secured to a carriage 1 which is slidably moved along a guide. A magnetic catch 8 having an absorbing surface perpendicular to the afore-mentioned absorbing surface 7 is provided on the top surface of the nut 5, and is closely contacted to the bottom surface of the carriage 1 to prevent the nut 4 from rotating around the screw 4. Accordingly, even if any slight deviation exsists in the parallelism between the feed screw and the guide, such a deviation is absorbed by the magnetic catch, thereby the stable linear movement of the carriage may be assured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a linear moving device using a feed screw and a nut, and in particular, a high-precision moving device that has no vaso crush and has extremely small gaps between the feed guide, the screw, and the nut. For example, it is effective when applied to a Bi-Quanop feeding mechanism of a high-density information recording device.

Conventional (111') structure and its problems An example of a conventional linear movement device using a feed screw is shown in FIG. The carriage 1 is supported by two parallel feed guides 2 so as to be slidable in the direction of the arrow. A nut 3 is fixed to this carriage 1, and this nut 3 is screwed onto a feed screw 4, and drives the carriage 1 as the feed screw 40 rotates. In this case, the feed screw 4 and the guide 2 must be completely parallel to each other, and if the flat 11 degrees are off, the feed screw 4 will not be parallel to each other, so setting the screw 4 is difficult and takes a lot of time. was spending.

This has to be done every time the screws and guides are maintained, which is a big problem.

In addition, other conventional methods include providing a gap between the guide and the carriage with a nut that is sufficient to absorb the error in parallelism between the feed screw, but this method reduces the response between the feed screw and the carriage. delay.

Alternatively, when a vibrating body is mounted on a carriage, the carriage itself vibrates, but this has some drawbacks.

Purpose of the Invention The present invention aims to eliminate all of the above-mentioned drawbacks, and provides a linear movement device that can perform stable linear movement even if there is a slight deviation in parallelism between the feed screw and the guide □. It is.

Structure of the Invention The present invention connects the Nano 1 screwed onto a feed screw and a carriage that slides along a guide by a magnetic catch means that magnetically connects the nano 1- and a carriage that slides along a guide. Even if there is a slight error in parallelism, it is intended to be absorbed by the magnetic catch means.

DESCRIPTION OF THE EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS. 2, 3, and 4.

In the drawing, reference numeral 5 denotes a nut screwed onto the feed screw 4, and this nut 5 has suction UTi7. A first magnetic catch 6 is provided and is magnetically coupled with a suction plate 10 fixed to a carriage 1 that slides along a guide (not shown) 7 as in the conventional case. are doing. This lever has very high rigidity in the direction of feeding the screw 4, and has ease of movement in the direction of the suction surface 7.

Further, a magnetic catch 8 having a suction surface 9 perpendicular to the suction surface 7 is provided on the top surface of the nut 5, and is in close contact with the bottom surface of the carriage 1. This magnetic catch 8 is provided to prevent the nut 6 from rotating around the screw 4. Further, the magnetic catch 8 is configured to be freely slidable in the direction of arrow B in FIG. 2 (direction perpendicular to the suction surface 9).

Next, the operation of the present invention will be explained.

FIG. 3 shows a case where the parallelism of the screw 4 and the guide is shifted by an angle α in the direction of the upper and lower blades. Even if the NAND 5 moves from the position
The same amount of a' slip occurs between the magnetic catch 8 and the nut 5, and the same amount of a' slip occurs between the magnet catch 8 and the nut 5, which is absorbed by the rotation torque of J2 and 4. It won't happen.

Figure 4 shows a case where the screw 4 and the guide are out of parallelism by an amount b in the left-right direction. Natsu 5 is at Y position from X position Jl
f! ;Even if the parallelism is shifted by b in the left and right direction after moving to t, the magnetic catch 6
and the suction plate 1o, and between the magnetic catch 8 and the carriage 1, a slip of b', which is the same as b, occurs, resulting in absorption J''.The magnetic catch is placed on the carriage side, and the suction plate Even if it is provided on the NAND side, the same effect can be obtained, and the error in parallelism is absorbed without creating a gap 47 between the carriage and the nut, while maintaining large rigidity in the feed direction. This greatly simplifies the assembly and maintenance of the linear feed mechanism.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional linear movement device, FIG. 2 is a perspective view showing essential parts of an embodiment of the linear movement device of the present invention, and FIG. 3 is a side view illustrating the operation of the same embodiment. FIG. 4 is a plan view illustrating the operation of the same embodiment. 1... Carriage, 2... Guide, 3.5
...Nut, 4...Feed screw, 6,8
...Magnetic catch, 7,9...Adsorption surface, 1o...Adsorption plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A rotationally driven circular feed screw, a guide provided approximately parallel to the feed screw, a carriage supported by the guide and moved along the guide, and a nut screwed onto the feed screw. a first macnet catch that magnetically couples the nut and the carriage at a first plane perpendicular to the feed screw; a second macnet catch means that is magnetically coupled on a surface, and the second macnet catch means is configured to be movable in a direction perpendicular to the second surface. Device.