JP2023088786A - Motor-driven reciprocating device - Google Patents

Abstract

To provide a motor-driven reciprocating device in which a problem does not occur even if force moving a movable body in the same direction is further applied when the movable body reaches a movable terminal position.SOLUTION: A motor-driven reciprocating device 1-1 is equipped with a rotary shaft 40 that has a spiral groove 41 and is connected to a motor, and a movable body 60 that engages with the spiral groove 41 and reciprocates in a rotation axis direction with rotations of the rotary shaft 40. The movable body 60 is equipped with a groove engaging member 91 that engages with the spiral groove 41 of the rotary shaft 40 and moves in the rotation axis direction by rotations of the rotary shaft 40, a movable main body 61 that holds the groove engaging member 91 so as to move between a position engaging with the spiral groove 41 and a position separated from it and moves in the rotation axis direction integrally with the groove engaging member 91, and spring means 111 that separates the groove engaging member 91 from the spiral groove 41 to idle the rotary shaft 40 when force stopping movement is applied to the groove engaging member 91 moving in the rotation axis direction.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-driven reciprocating device that reciprocates a moving body by means of a motor.

2. Description of the Related Art Conventionally, a motor-driven reciprocating device driven by a motor has been used as a reciprocating mechanism for various detection devices such as sliding electronic parts, a reciprocating mechanism for optical heads in OA equipment, and the like.

In this type of motor-driven reciprocating device, for example, as shown in Patent Document 1, a feed shaft member (1) is connected to a drive motor (10), and the feed shaft member (1) is moved to a spiral body (2a). By engaging the engaging means (33) of the body (30) and rotating the feed shaft member (1) in forward and reverse directions, the moving body (30) is reciprocated and connected to the moving body (30). The object to be operated, such as various detection devices, is operated.

Japanese Patent Application Laid-Open No. 2001-200905

However, in the above motor-driven reciprocating device, after rotating the driving motor (10) in one direction and moving the movable body (30) to one end, the driving motor (10) is further rotated in the same direction. When trying to rotate, the moving body (30) cannot move in the same direction, so the feed shaft member (1) and the motor (10) cannot rotate, so the motor (10) generates abnormal heat. there were. In some cases, there is a risk that an excessive force may be applied to the engaging portion between the engaging means (33) of the moving body (30) and the spiral body (2a) or other portions, resulting in problems such as breakage. rice field.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its object is to prevent the motor from moving even when a force is applied to further move the moving body in the same direction when the moving body reaches the movable end position. To provide a motor-driven reciprocating device which does not cause abnormal heat generation in a motor or trouble in each component.

The present invention comprises a motor, a rotating shaft having a spiral groove and directly connected to the motor or connected to the motor via a rotary power transmission mechanism, and a rotating shaft that engages with the spiral groove of the rotating shaft and rotates. a moving body that reciprocates in the direction of the rotation axis of the rotating shaft as the shaft rotates, wherein the moving body engages with a spiral groove of the rotating shaft, a groove engaging member that moves in the rotational axis direction by rotation of a shaft; and a groove engaging member that is movably held between a position to engage with the spiral groove and a position to disengage from the spiral groove; When a force for stopping the movement is applied to the moving body main body that moves integrally in the direction of the rotation axis and the groove engagement member that moves in the direction of the rotation axis, the groove engagement member is separated from the spiral groove. and engagement/disengagement means for idly rotating the rotating shaft.
According to the present invention, even if a force is applied to further move the moving body in the same direction when the moving body reaches the movable end position, the rotating shaft can be idly rotated with respect to the moving body. . Therefore, the motor can continue to rotate even in such a state, and the motor can be prevented from generating abnormal heat. In addition, since no unreasonable force is applied to the power transmission path, it is possible to prevent troubles in each component.

Moreover, in addition to the above characteristics, the present invention is characterized in that a pair of the groove engaging members are installed at positions that sandwich the outer peripheral side surface of the rotating shaft.
According to the present invention, it is possible to reliably and smoothly engage and disengage the groove engaging member with the spiral groove of the rotating shaft.

In addition to the above characteristics, the present invention is characterized in that the engagement/disengagement means comprises an elastic force means for elastically bringing the groove engagement member into contact with the outer peripheral side surface of the rotating shaft from the moving body main body side. and
According to the present invention, it is possible to reliably and smoothly engage and disengage the groove engaging member with the spiral groove of the rotating shaft.

According to the present invention, even if a force is applied to further move the moving body in the same direction when the moving body has reached the movable end position, no unreasonable force is applied to the motor and the like. can be prevented from occurring.

FIG. 2 is a cross-sectional view of a main portion of the motor-driven reciprocating device 1-1 (cross-sectional view taken along line AA in FIG. 2); 1 is an overall perspective view of a motor-driven reciprocating device 1-1; FIG. FIG. 10 is an overall perspective view of the motor-driven reciprocating device 1-1 viewed from another angle; 1 is a perspective view of a main portion of a motor-driven reciprocating device 1-1; FIG. 1 is an exploded perspective view of a main portion of a motor-driven reciprocating device 1-1; FIG. 4 is a perspective view of the rotating shaft support member 50 as seen from below; FIG. 6 is a perspective view of the mobile body 61 as viewed from below; FIG. It is the perspective view which looked at groove engaging members 91 and 91 from the bottom. FIG. 4 is an operation explanatory diagram of the motor-driven reciprocating device 1-1; FIG. 2 is a cross-sectional view of a main portion of a motor-driven reciprocating device 1-2;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 5 are diagrams showing a motor-driven reciprocating device 1-1 according to a first embodiment of the present invention, FIG. 2 is an overall perspective view, FIG. 3 is an overall perspective view seen from a different angle from FIG. 2, FIG. 4 is a perspective view of the essential parts, and FIG. 5 is an exploded perspective view of the essential parts.

As shown in these figures, the motor-driven reciprocating device 1-1 is constructed by installing a motor 30, a rotating shaft 40, and a moving body 60 on a base 10. As shown in FIG. In the following description, "up" refers to the direction in which the rotating shaft 40 is viewed from the base 63 of the moving body main body 61 described below, and "down" refers to the opposite direction. "Front" refers to the direction in which the moving body 60 is viewed from the motor 30, and "back" refers to the opposite direction. A direction perpendicular to the front-rear direction on a horizontal plane is defined as a "width direction" or a "left-right direction." However, these directions are not intended to limit the directions in which the motor-driven reciprocating device 1-1 is used.

As shown in FIGS. 2 and 3, the base 10 is formed by bending opposite ends of a base body 11 made of a substantially rectangular long metal plate so as to stand upward. 13 and 15 are provided.

The base body 11 is formed with two slit-shaped movable body guide holes 17 and 19 parallel to each other in the longitudinal direction thereof. Both moving body guide holes 17 and 19 penetrate vertically, and have width dimensions for respectively inserting a lever-cum-guide portion 67 and a guide portion 69 of a moving body main body 61, which will be described later.

The support plate portion 13 has an outer surface that does not face the support plate portion 15 as a motor mounting surface 21 for mounting the motor 30 thereon. A shaft insertion hole 22 (see FIG. 3) is formed in the center of the support plate portion 13 . The other support plate portion 15 is formed with a support member mounting hole 23 (see FIGS. 4 and 5) at its center. As shown in FIG. 5, the shaft member attachment hole 23 is formed in a laterally long substantially rectangular shape.

The rotating shaft 40 is a lead screw configured by forming a spiral groove 41 over the entire length of its outer peripheral surface. One end of the rotary shaft 40 is formed with a recess (not shown) into which the output shaft 31 of the motor 30 described below is inserted and connected, and the other end of the rotary shaft 40 rotates in a shaft support hole 53 of a rotary shaft support member 50 described below. A shaft portion 43 that is freely inserted and held is protruded.

FIG. 6 is a perspective view of the rotating shaft support member 50 as seen from below. As shown in FIG. 1 and FIG. 5, the rotation shaft support member 50 is an integrally molded product of synthetic resin and has a substantially rectangular shape. ing. At the center of the rotating shaft support member 50, a cylindrical shaft support portion 51 is provided that protrudes toward the rotating shaft 40 side. formed. Claw portions 55 , 55 protrude in the same direction as the shaft support portion 51 from both left and right sides of the shaft support portion 51 of the rotating shaft support member 50 .

The moving body 60 comprises a moving body main body 61, a pair of groove engaging members 91, 91, and a pair of spring means 111, 111. As shown in FIG.

FIG. 7 is a perspective view of the moving body main body 61 as seen from below. As shown in FIG. 1 and FIG. 5, the moving body main body 61 is an integrally molded article made of synthetic resin, and holding arms 65 project upward from the central positions of the left and right sides of a rectangular plate-shaped base 63 . A lever/guide portion 67 and a guide portion 69 project downward from the lower portions of the holding arms 65 , 65 .

The base portion 63 has four guide holes 71 penetrating vertically near its four corners, and a pair of notch-like guide recesses 73 are formed on the lower side of the front side and the lower side of the rear side of the base portion 63 . there is The guide hole 71 is formed in an elliptical shape so that a movement guide portion 101 of a groove engaging member 91, which will be described below, is inserted and guided so as to be movable in a width direction of a predetermined dimension. The guide recess 73 is formed in a shape that engages a locking/guide portion 103 (claw 105) of a groove engaging member 91 described below and guides movement in the width direction of a predetermined dimension.

The holding arms 65 are formed in a substantially flat rectangular shape, and guide holes 75, which are circular through holes, are formed at positions where the holding arms 65 face each other.

The lever-cum-guide portion 67 and the guide portion 69 protrude downward from the lower portion of the holding arm 65, respectively. 19, and the lever/guide portion 67 is longer.

FIG. 8 is a perspective view of the pair of groove engaging members 91, 91 viewed from below. As shown in FIG. 1 and FIG. 5, the groove engaging member 91 is an integrally molded product made of synthetic resin. , a substantially flat plate rectangular standing portion 95 is provided, and two groove engaging portions 97, 97 in the form of linear protrusions inclined obliquely in the vertical direction are formed on the opposing surfaces of the co-locating portion 95. They are arranged in parallel. Both groove engaging portions 97, 97 have a pitch and a thickness to be inserted into the spiral groove 41 of the rotary shaft 40 with a one-pitch deviation. A columnar guide and elastic means holding portion 99 projects from the surface of the standing portion 95 opposite to the surface on which the groove engaging portions 97, 97 are provided. A pair of projecting movement guide portions 101 protrude from the lower surface of the base portion 93 . On both left and right sides of the base portion 93, locking and guiding portions 103 projecting downward in the form of arms are provided. A claw 105 is formed at the lower end of the locking/guiding portion 103 .

The spring means 111, 111 are composed of coil springs.

To assemble the motor-driven reciprocating device 1-1, the moving body 60 is first assembled. In order to assemble the moving body 60, the base of the moving body main body 61 is assembled by inserting the resilient means 111, 111 into the guide and resilient means holding portions 99, 99 of the pair of groove engaging members 91, 91, respectively. 63, and at this time, the tips of the guide and elastic means holding portions 99, 99 of the groove engaging members 91, 91 are inserted into the guide holes 75, 75 of the moving body main body 61, and at the same time, the groove engaging members The claws 105, 105 of 91, 91 are snap-in engaged with the guide recesses 73 of the moving body main body 61, and at the same time, the movement guide parts 101, 101 of the groove engaging members 91, 91 are engaged with the guide holes 71, 71 of the moving body main body 61. Insert into 71. As a result, the pair of groove engaging members 91, 91 are repulsed by the repulsive means 111, 111 in a direction in which they approach each other, and move within the guide recesses 73, 73 to a position where the claws 105, 105 are closest to each other. At the same time, the movement guide portions 101 and 101 move within the guide holes 71 and 71 to the closest position. In this way, the groove engaging member 91 is supported movably in the width direction at three points, the guide hole 75, the guide concave portion 73, and the guide hole 71, with respect to the moving body main body 61. When the members 91, 91 move away from each other or approach each other (width direction), the movement can be performed smoothly without rattling.

Next, the rotary shaft support member 50 is attached to the support plate portion 15 of the base 10 so as to block the shaft support member attachment hole 23 from the outer surface side. At this time, the claw portions 55 of the rotating shaft support member 50 are snapped in and locked to both the left and right inner sides of the shaft support member mounting hole 23 .

Next, the assembled moving body 60 is placed on the base main body 11 of the base 10 , and the lever-cum-guide portion 67 and the guide portion 69 of the moving body main body 61 are placed on the base main body 11 . They are inserted into the moving body guide holes 17 and 19, respectively.

Next, the rotating shaft 40 is inserted between the pair of groove engaging members 91, 91 of the moving body 60, and the shaft portion 43 projecting from one end of the rotating shaft 40 is attached to the rotating shaft support member 50. It is inserted into the shaft support hole 53 and rotatably supported.

At this time, the rotating shaft 40 is inserted while pushing apart the pair of groove engaging members 91, 91 against the elastic force of the elastic means 111, 111 in the direction away from them. At the same time, the pair of groove engaging portions 97 of the groove engaging members 91 are inserted into and engaged with the spiral groove 41 of the rotating shaft 40 .

Next, with the other end of the rotating shaft 40 facing the shaft insertion hole 22 (see FIG. 3) of the support plate portion 13 of the base 10, the motor 30 is brought into contact with the motor mounting surface 21 of the support plate portion 13. At the same time, the output shaft 31 of the motor 30 is inserted into the recess provided at the other end of the rotating shaft 40 to fix and connect. As a fixing method, for example, an adhesive, welding, or a mechanical fitting structure is used. Then, the motor 30 is fixed with screws 25 from the surface of the support plate portion 13 opposite to the motor mounting surface 21 . This completes the assembly of the motor-driven reciprocating device 1-1. The above assembly procedure is only an example, and it goes without saying that other various different assembly procedures may be used for assembly.

Then, for example, when the motor 30 is driven to rotate the rotating shaft 40, the groove engaging portions 97, 97 of the groove engaging members 91, 91 slide in the spiral groove 41 to move, so that the moving body 60 is moved. It moves toward the rotation axis direction B of the rotation shaft 40 . The direction of movement is opposite to the direction of rotation of the rotating shaft 40 .

On the other hand, when the rotating shaft 40 is rotated in one direction by the motor 30, the moving body 60 comes into contact with the supporting plate portion 15 (rotating shaft supporting member 50) or the supporting plate portion 13 of the base 10. When the rotating shaft 40 is further rotated in the same direction in this state, both groove engaging members 91, 91 move apart from each other against the elastic forces of the elastic means 111, 111 in the width direction (direction of arrow C in FIG. 9). Then, as shown in FIG. 9, the groove engaging portions 97, 97 are disengaged from the spiral groove 41. As shown in FIG. As the rotary shaft 40 continues to rotate, the engagement and disengagement of the groove engaging portions 97, 97 with the spiral groove 41 are repeated, and both the groove engaging members 91, 91 repeat reciprocating movement in the width direction and rotate. The idling of the shaft 40 continues. This allows the motor 60 to continue rotating. Therefore, since the rotation of the motor 60 is not blocked, there is no possibility that the motor 60 will generate abnormal heat. In addition, since an unreasonable force does not continue to be applied to the moving body 60 whose movement has stopped and other parts, each component is not damaged. When the rotating shaft 40 is rotated in the opposite direction, the groove engaging portions 97, 97 are engaged with the spiral groove 41, and the moving body 60 moves in the opposite direction.

As described above, the resilient means 111 disengages the groove engaging member 91 from the spiral groove 41 when a force for stopping the movement is applied to the groove engaging member 91 moving in the rotation axis direction B. It serves as an engagement/disengagement means for idly rotating the rotating shaft 40 .

When this motor-driven reciprocating device 1-1 is used as an electronic component, for example, as shown in FIG. Alternatively, the electrical output may be changed in accordance with the movement of the moving body 60 . A mechanical device (not shown) may be installed under the base 10 and operated by the lever/guide portion 67 or the guide portion 69 .

FIG. 10 is a cross-sectional view of a main portion (a cross-sectional view of the same portion as in FIG. 1) of a motor-driven reciprocating device 1-2 according to another embodiment of the present invention. In the motor-driven reciprocating device 1-2 shown in the figure, the same reference numerals are given to the same or corresponding parts as those of the motor-driven reciprocating device 1-1 shown in FIGS. Matters other than those described below are the same as those of the embodiment shown in FIGS.

The motor-driven reciprocating device 1-2 differs from the motor-driven reciprocating device 1-1 only in the configuration of the moving body main body 61A. That is, in this embodiment, the lengths of the lever-cum-guide portion 67 and the guide portion 69 of the moving body main body 61 in the motor-driven reciprocating device 1-1 are shortened to form guide portions 67A and 69A. The only difference is that the holding arm 65 on one side of the moving body main body 61 in the drive type reciprocating device 1-1 is made longer to form a lever/holding arm 65A.

With this configuration, the operating force of the moving body 60 can be pulled out above the motor-driven reciprocating device 1-2.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical ideas described in the claims, specification and drawings. It is possible. Any shape, structure, or material that is not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as it produces the action and effect of the present invention. For example, in the above-described embodiment, the motor 30 and the rotary shaft 40 are directly connected, but the connection between the two may be performed through various power transmission mechanisms such as a gear transmission mechanism and a belt transmission mechanism.

Further, in the above embodiment, the groove engaging member 91 and the resilient means 111 are arranged in pairs at positions sandwiching the outer peripheral side surface of the rotary shaft 40 from both sides, but only one set of the groove engaging member 91 and resilient means 111 is provided. may be provided. Of course, if the groove engaging member 91 and the resilient means 111 are installed at a position sandwiching the outer peripheral side surface of the rotating shaft 40, the engagement and disengagement of the groove engaging member 91 with the spiral groove 41 of the rotating shaft 40 are more balanced. It can be done safely and smoothly.

Further, in each of the above-described embodiments, the coil spring is used as the resilient means 111, which is the engagement/disengagement means, but instead of the coil spring, other various resilient means such as a leaf spring may be used. In short, any resilient means may be used as long as the groove engaging member 91 is resiliently brought into contact with the outer peripheral side surface of the rotary shaft 40 from the moving body main body 61 side.

As described above, the motor-driven reciprocating devices 1-1 and 1-2 have the spiral groove 41 and are directly connected to the motor 30 or connected to the motor 30 via a rotational power transmission mechanism. It comprises a shaft 40 and a moving body 60 that engages with the spiral groove 41 of the rotating shaft 40 and reciprocates in the rotation axis direction B of the rotating shaft 40 as the rotating shaft 40 rotates. Groove engaging members 91, 91 that engage with the spiral groove 41 of the rotating shaft 40 and move in the rotation axis direction B as the rotating shaft 40 rotates, and the position where the groove engaging members 91, 91 engage with the spiral groove 41. A moving body main body 61 which is movably held at and a disengaged position and moves integrally with the groove engaging members 91, 91 in the rotational axis direction B, and groove engaging members 91, 91 which move in the rotational axis direction B. and resilient means (engagement/disengagement means) 111, 111 for causing the groove engaging members 91, 91 to disengage from the spiral groove 41 to make the rotating shaft 40 idle when a force to stop the movement is applied. is configured as As a result, when the moving body 60 reaches the movable end position, even if a force is applied to further move the moving body 60 in the same direction, the rotary shaft 40 can be idly rotated relative to the moving body 60. can. Therefore, even in such a state, the motor 30 can continue to rotate, thereby preventing the motor 30 from abnormally generating heat. In addition, since no unreasonable force is applied to the power transmission path, it is possible to prevent troubles in each component.

The above description and the embodiments shown in the drawings can be combined with each other as long as there is no contradiction in the purpose, configuration, and the like. In addition, even if only a part of the above description and the contents of each drawing can be independent embodiments, the embodiment of the present invention is one embodiment in which the above description and each drawing are combined. is not limited to

1-1, 1-2 Motor-driven reciprocating device 10 Base 30 Motor 40 Rotating shaft 41 Spiral groove B Direction of rotation axis 60 Moving body 61 Main body of moving body , 91... Groove engagement member, 111... Elastic means (engagement/disengagement means)

Claims (3)

a motor;
a rotary shaft having a spiral groove and directly connected to the motor or connected to the motor via a rotary power transmission mechanism;
a moving body that engages with the spiral groove of the rotating shaft and reciprocates in the direction of the rotation axis of the rotating shaft as the rotating shaft rotates;
A motorized reciprocating device comprising:
The moving body is
a groove engaging member that engages with the helical groove of the rotating shaft and moves in the direction of the rotation axis as the rotating shaft rotates;
a moving body main body that movably holds the groove engaging member between a position engaging with the spiral groove and a position disengaging from the spiral groove, and moves integrally with the groove engaging member in the direction of the rotation axis;
engagement/disengagement means for causing the groove engagement member to disengage from the spiral groove and idle the rotation shaft when a force for stopping the movement is applied to the groove engagement member moving in the direction of the rotation axis;
A motor-driven reciprocating device comprising: A motor-driven reciprocating device according to claim 1, comprising:
A motor-driven reciprocating device, wherein a pair of the groove engaging members are installed at positions sandwiching the outer peripheral side surface of the rotating shaft. The motor-driven reciprocating device according to claim 1 or 2,
The motor-driven reciprocating device, wherein the engagement/disengagement means comprises elastic means for elastically contacting the groove engagement member from the moving body main body side to the outer peripheral side surface of the rotating shaft.

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