JPH0545304U - Linear movement device - Google Patents

Abstract

(57) [Summary] [Purpose] The moving body and the driven body are coupled elastically in the vertical a direction and the horizontal b direction to eliminate play in the lateral direction and to generate pressurization. Prevent the generation of noise by pressing the moving body against. [Structure] A frame 2 is fixed onto a substrate 1 with screws 3 and a motor 4 is fixed to the outside of one side standing portion 2a of the frame 2. A moving body 7 made of synthetic resin is screwed onto the feed screw shaft 5 protruding from the inside of the motor 4. A driven body 8 is coupled to the moving body 7, and the driven body 8 is a support plate 1 erected on the substrate 1.
A guide member 9 fixed to a and 1b and parallel to the feed screw shaft 5 is configured to be linearly movable. A screw groove and a presser 7b are formed at one end of the moving body 7 screwed onto the feed screw shaft 5. A flexible Y-shaped connecting portion 7c is formed at the other end of the moving body 7. A mountain-shaped protrusion 8a is provided at one end of the driven body 8.
Are formed. The chevron projection 8a is fitted into the recess 7d of the Y-shaped coupling portion 7c by expanding the coupling portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a linear moving device in which a driven body that can move linearly is coupled to a moving body that moves linearly with a feed screw shaft.

[0002]

[Prior Art]

 In the conventional linear moving device, for example, as shown in FIG. 3 (a), a feed screw shaft 5 rotated by a motor has a screw groove 7a formed at one end of a moving body 7'as shown in FIG. 3 (b). The movable body 7'is fitted and pushed by the presser 7b to linearly move, and the driven body 8'which is linearly movable by the guide member 9 parallel to the screw shaft 5 is coupled to the movable body 7 '. In this coupling structure, an elastic fork 7e is formed at the other end of the moving body 7 ', and the elastic fork 7e is fitted in the recess 8b of the driven body 8'.

[0003]

[Problems to be solved by the device]

 The problem to be solved is that, in the above-described connecting structure of the moving body and the driven body, elastic connection is made in the moving direction, but free connection is made in the direction of the arrow b in FIG. 3A. Such a free combination has a drawback that left-right noise is generated. In view of the above-mentioned drawbacks, an object of the present invention is to connect a moving body and a driven body by elastically connecting in the vertical a direction and the horizontal b direction to eliminate play in the lateral direction and to generate pressurization. It is to propose a linear movement device that prevents the generation of noise by allowing a moving body to be pressed against the shaft.

[0004]

[Means for solving the problem]

 The present invention forms a flexible Y-shaped coupling part on a synthetic resin moving body that moves linearly by the rotation of a feed screw, and uses a guide member parallel to the screw axis as a follower that can move linearly. The gist of the invention is to form a chevron-shaped protrusion that is fitted by expanding the joint.

[0005]

[Action]

 When the motor 4 is rotated, the moving body 7 is linearly moved in the direction of arrow a in the figure by the rotation of the feed screw shaft 5. By this movement, the driven body 8 coupled to the moving body 7 is linearly moved along the guide member 9 parallel to the feed screw shaft 5. At this time, since the moving body 7 and the driven body 8 are coupled by the Y-shaped coupling portion 7c and the chevron protrusion 8a, the vertical a direction and the horizontal b direction of the arrow are elastically coupled to each other, and there is no play. Occurs, the moving body 7 is pressed against the feed screw shaft 5 to prevent noise.

[0006]

【Example】

 Hereinafter, the present invention will be described with reference to an illustrated embodiment. FIG. 1 is a plan view of a linear moving device, and FIG. 2 is an enlarged plan view of a main part.

In the linear movement device shown in FIG. 1, a frame body 2 is fixed on a substrate 1 with screws 3. A motor 4 is fixed to the outside of the one-side upright portion 2a of the frame body 2. The other end of the feed screw shaft 5 protruding from inside the motor 4 is rotatably supported by the other side upright portion 2b of the frame body 2, and the tip of the feed screw shaft 5 is pressed and biased by a spring plate 6. . A moving body 7 made of synthetic resin is screwed onto the feed screw shaft 5. A driven body 8 is coupled to the moving body 7. The driven body 8 is fixed to the support plates 1a and 1b erected on the substrate 1 and is configured to be linearly movable by a guide member 9 parallel to the feed screw shaft 5. . A moving object 10 is fixed to the driven body 8.

The moving body 7 screwed onto the feed screw shaft 5 has a thread groove 7a and a presser foot 7b formed at one end, as in FIG. 3B. At the other end of the moving body 7, a flexible Y-shaped connecting portion 7c is formed as shown in FIGS.

A chevron projection 8 a is formed at one end of the driven body 8. The chevron protrusion 8a is fitted into the recess 7d of the Y-shaped joint 7c with the joint expanded.

When the linear moving device is formed as described above and the motor 4 is rotated, the moving body 7 is linearly moved in the direction of the arrow a in the figure by the rotation of the feed screw shaft 5. By this movement, the driven body 8 coupled to the moving body 7 is linearly moved along the guide member 9 parallel to the feed screw shaft 5.

When the linear moving device is configured as described above, the moving body 7 and the driven body 8 are elastically coupled by the flexible Y-shaped coupling portion 7c and the chevron protrusion 8a. Since the vertical a direction and the horizontal b direction are elastically connected and there is no play, and the pressurization is generated by the elastic connection, the moving body 7 is pressed against the feed screw shaft 5 and the backlash in this part is eliminated and the noise is eliminated. Is prevented from occurring. Furthermore, even if the vertical positioning accuracy of the motor 4 is somewhat uneven, it is absorbed by elastic coupling.

[0012]

[Effect of the device]

 As described above, according to the present invention, since the movable body and the driven body are elastically coupled by the flexible Y-shaped coupling portion and the chevron protrusion, the vertical and horizontal directions of the arrow are elastically coupled so that there is no play. In addition, since the pressurization is generated by the elastic coupling, it is possible to provide the linear movement device that is excellent in practical use such that the moving body is pressed against the feed screw shaft to prevent the generation of noise.

[Brief description of drawings]

FIG. 1 is a plan view of a linear movement device.

FIG. 2 is an enlarged plan view of a main part of a linear movement device.

FIG. 3A is a plan view of a main part of a conventional linear movement device,
(B) is a perspective view of a main part of the moving body.

[Explanation of symbols]

 5 Feed screw 7 Moving body 7c Flexible Y-shaped connecting portion 8 Follower 8a Angle protrusion

Claims (1)

[Scope of utility model registration request] 1. A driven body that is linearly movable by a flexible Y-shaped coupling portion formed on a synthetic resin movable body that linearly moves by rotation of a feed screw and a guide member parallel to the screw axis. A linear movement device in which a chevron-shaped protrusion is formed to expand and fit the coupling portion.