JP2009115171A - Cam device having output shaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cam device having an output shaft capable of interlocking and connecting a driven shaft 6 with and to an optional work body as the output shaft for performing cam driving control, instead of a rotary output shaft of a connected motor driving means 1b, by transmitting rotation of a cam body 5 integrally rotating with a rotor 4 to the driven shaft 6 via an engaging piece 61 as thrust, while driving the driven shaft 6 by a cam by the cylindrical cam body 5. <P>SOLUTION: A cam means 1a is stored in a casing 2 so as to be connectable to the rotational movement of the motor driving means 1b via a bottom part 51 of the cylindrical cam body 5 of a substantially U shape in a cross-sectional view, and the driven shaft 6 is arranged in the center of a cylindrical part 52 by integrally installing the engaging piece 61 on its base end part side, and its tip side is constituted to be driven by the cam as the output shaft of the interlockingly connected motor driving means 1b so as to protrude and retreat from a casing front face. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cam device including an output shaft that can move forward and backward along the shape of a cam surface of a cam body.

  In general, the mechanical cam means is composed of a main shaft (motor output shaft), a cam body and a driven shaft (follower shaft). The cam body is a means for changing the rotational motion into a linear motion, and a desired one during one rotation. By arranging a driven shaft on the circumference of the cam surface corresponding to the operation curve (displacement curve) and rotating the cam body to obtain the desired linear motion, the rotation of the main shaft is mechanically moved forward and backward. What converts to displacement is known.

  Conventionally, as shown in Patent Document 1, a cylindrical (cap-shaped) cam body referred to as a so-called groove cam, in which a cam surface (23) extending in the axial direction from the outer periphery of a disk-shaped bottom portion is formed. (19) is connected to a motor output shaft (18) as a main shaft, and a push rod (24) is engaged with a cam surface (23) to form a guide rod (15) integrally formed as a valve body (12). There is one that is moved forward and backward as a driven shaft. Such a cylindrical cam body has an advantage that the driven shaft can be arranged coaxially with the main shaft, compared to what is called a plate cam.

However, this is formed in a state where the cam surface (23) of the cam body (19) cuts the cylindrical portion extending from the bottom, and the guide rod (15) serving as the cam surface (23) and the driven shaft. ) Is interposed between the base end portion and the guide rod (15) and the pressing rod (24) with respect to the cam surface (23) through the coil spring (17) at all times in the backward direction. It has a structure that is biased.
Therefore, the coil spring (17) is an essential component in the structure, and the pressing rod (24) must be brought into elastic sliding contact with the cam surface (23) by both end engagement, which is obtained during one rotation. The shape of the cam surface corresponding to the operation curve is such that the cam body (19) must be a symmetrical shape using a 180 ° half-circular arc region that bisects the entire peripheral region of the cam surface (23). ) Can not be driven, only a short stroke cam drive with a simple cam shape can be performed, and of course, the cam surface can be formed over the entire circumference of 360 ° (360 ° (one rotation)) The above cam surface cannot be formed, the cam shape can be manufactured in various variations, and the cam can not be driven with a long stroke cam surface. The problem of inferiority In addition, the cam mechanism is employed to construct a flow control valve device that cams the valve body through the guide rod (15) in the sealed valve body block (1a, 1b), and directly drives the driven shaft. It could not be used as an independent output shaft for driving to connect to other work bodies such as a screw shaft of a dynamic motor.

Japanese Utility Model Publication No. 60-124771

  The present invention was devised to eliminate the above-mentioned problems, and the driven shaft is cam-driven by a cylindrical cam body, and the rotational output of the drive motor connected to the driven shaft is provided. Instead of a shaft, it can be linked to an arbitrary work body as an independent output shaft in the same way as a linear motor, and a cam-shaped cam body with various variations can be easily manufactured and connected. It is an object of the present invention to provide a cam device having an output shaft that can be optimally cam-driven according to the demand of a workpiece to be processed.

  The technical means employed by the present invention to solve the above-mentioned problems are provided in a manner that can rotate in conjunction with the rotation of the motor driving means to be connected, and extend in the axial direction from the outer periphery of the disk-shaped bottom. A cam body having a cam surface formed thereon, and a follower capable of moving forward and backward while being driven by an engagement piece that is slidably engaged along the cam surface while being guided by predetermined guide means by rotation of the cam body. A cam means having a shaft, wherein the cam means is configured such that the cam body is substantially U-shaped in cross-section with the bottom portion and the cylindrical tube portion, and motor driving means is provided via the bottom portion. The driven shaft is housed in the casing so as to be connectable to the rotation, and the engagement piece is integrally attached to the base end side of the driven shaft, and is arranged at the center of the cylindrical portion. The cam surface is configured to be able to protrude and retract from the front surface of the casing, while the cam surface is By forming a predetermined cam groove on the inner peripheral wall surface, it is configured to have a facing cam shape consisting of a pushing cam surface and a pulling cam surface, and the driven shaft is rotated as the cam body rotates. Then, the engagement piece is pushed and slid by the climbing gradient formed on the pushing cam surface and is driven in the forward direction, and the sliding is caused by the descending gradient formed on the dragging cam surface. It is configured to be driven in the backward direction so as to drive the cam as an output shaft of the motor drive means linked to each other.

The cam device provided with the output shaft in the present invention drives the driven shaft by a cylindrical cam body, but the driven cam surface and the driven cam surface face each other along with the driven shaft. The cam can be driven without adopting a configuration in which the engagement piece is always elastically biased in the backward direction with respect to the cam surface, and not only a coil spring is required, but the structure can be simplified, and the driven shaft is engaged. The pieces are slidably guided along the respective cam surfaces of the push-side cam surface and the pull-side cam surface, so that they can be connected by cam drive that can adopt not only reciprocal movement but also circumferential movement. In place of the rotation output shaft of the motor drive means, the cam body can function as an output shaft of a cam drive motor capable of moving forward and backward which can be interlocked with an arbitrary work body, and is housed in a casing. With a cam stroke of an arbitrary length corresponding to an operation curve of arbitrary rotation such as half rotation, one rotation, and two rotations, it becomes easy to select and adopt cam shapes with various variations. It is possible to function as a cam drive motor simply by interlocking the motor drive means with the optimum cam means corresponding to the cam drive required by the work body.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cam apparatus that exemplifies an embodiment of the present invention as a preferred embodiment will be described below in detail with reference to the drawings.
1 is an overall longitudinal sectional view of a cam drive motor, FIG. 2 is a front side view, and FIG. 3 is a rear side view. As shown in the figure, reference numeral 1 denotes a cam drive motor. The cam drive motor 1 includes cam means 1a as a cam device having an output shaft according to the present invention, and motor drive means 1b having a PM type stepping motor structure. Are integrally configured. The motor driving means 1b includes a casing body in a cylindrical casing body 21 having a substantially U-shaped cross-sectional view in which a cylindrical body portion and an end side portion constituting the casing 2 are integrally formed (may be separate). A cylindrical yoke (stator) 3 constituting a body portion 21 and a multipolar magnetized rotor 4 that is rotatably inserted inside the yoke 3 are configured.
The yoke 3 includes a pair of yoke blocks 31 and 31 and includes a coil bobbin 32 and an excitation coil 33, respectively. The casing body 21 is made of iron, magnetic stainless steel, or the like, and a plurality of concave and convex pole teeth (not shown) are formed at a constant pitch on the inner peripheral surface of the yoke block 31 corresponding to the magnetic pole interval of the rotor 4. A so-called two-phase coil unit is configured, and the yoke blocks 31 and 31 are assembled such that their pole teeth are displaced by a step angle.

  The rotor 4 has a columnar (cylindrical) rotor collar 42 made of resin such as brass, copper or aluminum having an insertion hole 41 formed in the axial center region thereof, and an outer peripheral surface of the rotor collar 42. It is composed of a ring-shaped magnet 43 in which S poles and N poles are alternately magnetized in multiple poles, and is rotated on a bush 71 provided at the center of the end side portion of the casing body 21 on the rear end side. It is pivotally supported, and is held rotatably at its front end side by a cylindrical holding body 72 that holds a cam body 5 described later.

The cam means 1a has a casing as a cam device formed by extending the body portion of the casing main body 21 of the motor drive means 1b. The cam body 5 fitted into the extension body portion is also used as the motor drive means 1b. The driven shaft 6 that protrudes and protrudes from the front surface of the casing of the front cap 22 is accommodated.
The cam body 5 is made of resin (or may be made of metal), and has a cross section by a disc-shaped bottom portion 51 and a cylindrical portion 52 in which a cam surface 53 extending from the outer periphery thereof toward the axial direction is formed. It is formed into a U-shaped (concave) cylindrical shape and is provided so as to be integrally rotatable in conjunction with the rotation of the rotor 4. In other words, when connecting the cam body 5 adjacent to the rotor 4, the cam body 5 and the rotor collar 42 are connected to each other at the bottom portion 51 as an integrally formed product (a separate body may be connected). The rotor 4 is composed of the same material, and is supported so that the outer peripheral surface of the cam body 5 can be slidably rotated by a resin-made holding body 72 in a state where both are integrally rotated. The front end side is supported by the holding body 72 and the base end side is rotatably supported by the bush 71. In this manner, the cam body 5 is integrally formed with the rotor collar 42 on which the multi-pole magnetized ring-shaped magnet is mounted, so that the cam body 5 can be manufactured as a molded product that is centered.
The cam body 5 may be connected to the bottom 51 as a connecting member instead of the rotor collar 42 as a rotation output shaft provided in the conventional motor driving means 1b, and the rotor 4 can be supported by bearing the cam body 5 itself. However, when the cylindrical portion of the holding body 72 is not required, the rotor collar 42 itself may be supported on the base side of the holding body 72, and the cylindrical portion of the holding body 72 is camped. The casing 2 body portion in the region where the body 5 is disposed may be configured adjacent to the casing body 21 where the motor driving means 1b is disposed.

The cam body 5 is provided with a follower shaft 6 capable of moving forward and backward along the undulating shape of the cam surface 53 while being guided by predetermined guide means by the rotation of the cam body 5.
The driven shaft 6 is formed in a drum shape in cross-sectional view in which the outer peripheral facing surface of the cylindrical shaft is cut into two D-shapes (arc-shaped), and the front end of the driven shaft 6 forms the front side portion of the casing 2. 22 (also used as motor drive means 1b) is supported by a bearing portion 222 of a bearing member 221 provided so as to be movable forward and backward. The bearing portion 222 is configured by a shaft-hole-shaped bush that is adapted to the non-rotating shape of the driven shaft 6. On the other hand, the base end side of the driven shaft 6 is firmly fitted to the center of the columnar base 62 and is provided with engagement pieces 61 and 61 that engage with the cam surface 53 via the base 62. . The base 62 has a function of reducing the load distribution by reducing the length of the engagement piece 61 when the diameter of the cam body 5 is increased and the cam surface 53 requires a distance from the shaft center. The tip of the piece 61 abuts against the inner wall surface of the cylindrical portion of the holding body 72 when the driven shaft 6 moves, and functions as an anti-shake piece. As a result, the driven shaft 6 is guided by the guide means constituted by the bearing portion 222 on the distal end side and the holding body 72 that restricts the engagement piece 61 on the proximal end side as the cam body 5 rotates. The cam shaft 53 is driven along the undulating shape of the cam surface 53, and the driven shaft 6 functions as a motor output shaft that is interlocked and connected to a so-called workpiece body that protrudes and retracts from the bearing portion 222 to the outside.

Further, the base end side of the driven shaft 6 is slidably guided and supported by a bearing portion 8 provided to form a guiding means together with the bearing portion 222 on the distal end side. The bearing portion 8 is fixed to the rear surface of the casing 2 whose base end portion is the center of the cylindrical hole of the yoke 3, and the tip side portion penetrates the insertion hole 41 formed in the shaft core of the rotor 4 in a non-contact manner. The guide shaft 81 is long enough to reach the inside of the cylinder of the body 5 and the guide hole 82 is formed in the shaft core on the base end side of the driven shaft 6 inserted into the guide shaft 81. The guide shaft 81 is inserted so as to be slidably guided and supported with respect to the guide hole 82, and the insertion length thereof is a length that does not allow insertion and disengagement even when the maximum movement stroke amount due to the undulation of the cam surface 53 is exceeded. Is set. Although the guide shaft 81 is erected with its base end fixed to the rear surface of the casing 2, it may be erected directly on the shaft core of the cam body bottom 51 and inserted into the guide hole 82. .
With this configuration, a guide stroke of the guide shaft 81 can be formed in the guide hole 82 of the driven shaft 6, and the driven shaft 6 has the distal ends of the engagement pieces 61, 61 on the proximal end side and the holding body 72. There is no need to function as a guide means by restricting blurring by abutting against the inner wall surface.
The guide shaft 81 is also used as a fixing member that fixes the bush 71. The guide shaft 81 is a cylindrical shaft. However, if the shaft is a drum-like shaft in cross-section as in the case of the driven shaft 6 and is inserted into the guide hole 82 corresponding thereto, the driven shaft 6 Can be formed as a cylindrical shaft.

FIG. 4 is an overall longitudinal sectional view of a cam drive motor showing another embodiment of the guide means for guiding and supporting the base end side of the driven shaft 6. As shown in this figure, the base end side of the driven shaft 6 is guided and supported by a bearing portion 8a provided together with the bearing portion 222 on the distal end side so as to constitute guide means. The bearing portion 8a includes a guide shaft 81a extending to be inserted into the insertion hole 41 of the rotor 4 in a non-contact manner on the proximal end side of the driven shaft 6, and a cam body 5 for guiding and supporting the guide shaft 81a. It is comprised with the ring-shaped bush 82a provided in the axial center of the bottom part 51. FIG. The bearing tolerance between the guide shaft 81a and the bush 82a is arbitrary, and the insertion length of the guide shaft 81a into the insertion hole 41 is long enough not to be inserted and disengaged even when the maximum movement stroke amount due to the undulation of the cam surface 53 is exceeded. Is set.
With this configuration, the guide stroke of the guide shaft 81 a can be formed in the insertion hole 41 of the rotor 4, and the driven shaft 6 has the distal ends of the engagement pieces 61, 61 at the proximal end side and the holding body 72. There is no need to function as guide means for restricting blurring by abutting against the inner wall surface.

  FIG. 5 is a development view showing the cam shape of the cam surface 53 applied to the cylindrical portion 52 of the cam body 5, and the cam surface 53 forms a predetermined cam groove 53 a with respect to the inner peripheral wall surface of the cylindrical portion 52. Thus, the push cam surface 531 and the pull cam surface 532 are formed in a meandering cam shape. That is, the cam body 5 functions as a guide groove that guides the engagement piece 61 along the shape of the cam groove 53a, and by changing the length of the cylindrical portion 52, the surface area of the cam groove 53a, that is, The length of the cam surface 53 can be expanded, and the cam groove 53a can be arbitrarily formed by extending the cylindrical portion 52 in the axial direction to form a spiral shape around the circumference. . Further, the cam groove 53a does not need to be formed to have a width that can guide the engaging piece 61 in all the cam surface areas, and is formed wider than the width of the engaging piece 61, or the push side and the pull side cam. For example, one surface area of the belt-like groove of the surface may be made different as a smooth surface and the other as a curved surface. With this configuration, the wide cam groove 53a is formed in all or a part of the belt-like groove, and the setting operation of the driven shaft 6 with the distal end of the engagement piece 61 inserted in the wide cam groove 53a portion is easy. In addition, the connected work is disengaged from the follower shaft 6 and can function as a region where the work can be freely operated.

  FIG. 5 (A) shows the cam groove shape of the cam surface 53 of this embodiment, and the two cam grooves 53a and 53a are symmetrically opposed to each other with a similar cam shape as a pair. The formed cam body 5a is configured such that a pair of engagement pieces 61, 61 are engaged with the respective cam surfaces at both ends and are slidably guided. The two cam grooves 53a end with respect to a circumferential area of about 3/4 (270 °) of the inner peripheral wall surface of the cylindrical portion 52 from the start portion (the bottom portion of the cam undulation) via a gentle slope portion. As a cam shape reaching the portion (smooth top portion of the cam undulation), the start region of one cam groove 53a and the end region of the other cam groove 53a are formed in such a manner that they overlap the same peripheral region. Of course, the length of this polymerization zone can be set arbitrarily, and it is of course optional not to polymerize.

  On the other hand, FIG. 5B shows another embodiment of the cam groove shape, and cantilever engagement (both-end engagement) with one cam surface 53 like the engagement piece 61 shown in FIG. In this case, the cam body 5b is applied to a structure formed by two cam grooves facing each other as shown in FIG. In this cam body 5b, the cam surface 53 has a push-side cam surface 531 in a cam shape with no downward slope from the start to the end, and the pull-side cam surface 532 has an upward slope from the end to the start. In the section from the start to the end, the engaging piece 61 has a pushing cam surface 531 as a forward path for forward rotation of the cam body 5b and a pulling side cam for reverse rotation. It is configured to reciprocate using the surface 532 as a return path. In other words, the cam surface 53 has a gentle first slope portion 540 ° from the start portion (bottom portion of the cam undulation) to 270 ° with respect to a circumferential region of 720 ° that makes two rounds on the inner peripheral wall surface of the cylindrical portion 52. As a spiral cam shape that reaches the end (the top of the cam undulation) through the smooth part and the second slope part up to 690 °, which is set to an inclination angle approximately twice that of the first slope part The engaging piece 61 is formed in a guided manner. It is optional to set the spiral cam surface 53 to various undulating cam groove curves, such as the setting of not only the rising slope portion but also the falling slope portion and the combination with the smooth portion. It is also optional to arrange them oppositely as in 5a.

  FIG. 5C shows another embodiment of the cam shape, and the engagement piece 61 is applied to both the cantilever engagement and the both-end engagement depending on the cam shape. In the example, it is a cam-shaped cam body 5c applied to cantilever engagement. That is, the cam body 5c is formed by forming the cam groove 53a into a concave groove with respect to the inner peripheral wall surface leaving the outer peripheral wall surface of the cylindrical portion 52, or by forming a cam groove 5a, 5b. The engagement member 61 is formed in an annular shape (ring shape) so as to be able to go around the cam groove 53a. The cam surface 53 has a slope groove that gradually rises by 90 ° from the smooth portion in the cam stroke region up to 180 ° of the 360 ° cam groove 53a, and reaches the arcuate top. It is formed into a undulating portion shape consisting of an ascending gradient and a descending gradient through a descending slope groove of .degree. To the smooth portion, and further a smooth portion of 180.degree. To 360.degree. Is formed. When the engagement piece 61 is engaged at both ends, the same cam shape formed in the cam stroke region from 0 ° to 180 ° may be formed in the cam stroke region from 180 ° to 360 °.

  As described above, the follower shaft 6 of the cam means 1a that is rotatably provided in conjunction with the rotation of the motor drive means 1b has the engaging piece 61 guided to the cam groove 53a as the cam body 5 rotates. As a result, the cam is driven, and the front cap 22 protrudes and protrudes from the bearing portion 222 which is the front surface of the casing. When the driven shaft 6 is cam-driven by the cam bodies 5a and 5b in which the cam groove 53a having the start portion and the end portion shown in FIGS. 5A and 5B is formed, the engagement piece 61 is moved from the start portion. Drives back and forth between the ends. That is, the engagement pieces 61 are respectively controlled on the push-side cam surface 531 which is the forward path during forward rotation driving and on the driving-side cam surface 532 which is the backward path during reverse rotation driving by the forward / reverse drive of the motor driving means 1b. Reciprocating while being driven and guided, the driven shaft 6 is cam-driven as the output shaft of the motor driving means 1b. In the present embodiment, the cam drive motor 1 is illustrated as an integral configuration, but the motor output shaft may be connected to the center of the bottom 51 as disclosed in Patent Document 1. good.

When the cam body 5a having a simple cam shape shown in FIG. 5 (A) is used, the engagement piece 61 is cam-driven so as to simply reciprocate from the start to the end. Suitable for work that performs operations such as in / out.
Further, when using the cam body 5b provided with the complex-shaped cam groove 53a shown in FIG. 5 (B), the control of the engagement piece 61 to simply reciprocate from the start to the end is as follows. Needless to say, a smooth groove formed in the intermediate region from the start portion 0 ° to the end portion 720 ° is used as an intermediate point, and the cam groove 53a formed between the start portion 0 ° and the smooth portion 360 ° is used. The driven shaft 6 can be driven forward and backward by a combination of one cam drive region and a second cam drive region using a cam groove 53a formed between the smooth portion 360 ° and the end portion 720 °. For example, in a workpiece such as valve opening / closing control, the engagement piece 61 is positioned at the beginning when the valve body linked to the driven shaft 6 is controlled to open / close the two flow ports A and B provided side by side. In this case, both the flow ports A and B are opened, and in the first cam drive region, the flow port A is closed and the flow port B is opened, and the motor is stopped and held at the smooth portion 360 °. The second cam drive region opens the flow port A and opens the flow port B, and performs complicated cam drive control such as positioning and stopping the motor at the smooth portion 720 ° (end portion). It is possible. Note that the positioning and holding by the motor stop in the smoothing section is such that the driven shaft 6 can be self-held even in a non-energized (non-excited) state.

5C, when the cam body 5c provided with the cam groove 53a having the shape shown in FIG. 5C is used, the engagement piece 61 circulates the cam groove 53a, so that the follow along the shape of the undulating portion is performed. The cam drive is intermittently repeated through the smoothing portion, and is suitable for, for example, a work involving intermittent operations such as opening and closing and raising and lowering.
FIG. 6 shows an embodiment in which the cam body 5c is applied. As shown in FIG. 6, the cam means 1a has the engagement piece 61 that is cantilevered along the cam groove 53a of the rotating cam body 5a. By rotating around, the driven shaft 6 whose rotation is restricted is driven to drive the cam. The engagement piece 61 by the cantilever engagement can be easily realized by adopting a configuration in which the proximal end side of the driven shaft 6 is guided and supported by the bearing portion 8 (8a) together with the bearing portion 222 on the distal end side. Can do. In other words, the driven shaft 6 is driven by the rotational drive of the motor driving means 1b, and the engaging piece 61 is pushed in the protruding direction along the pushing side cam surface 531 which is the rising slope of the undulating portion shape, and the driven shaft 6 is drawn downward. The engaging piece 61 is pulled in the immersing direction along the side cam surface 532, and is cam-driven as the output shaft of the motor driving means 1b while being guided between the pushing side cam surface 531 and the drawing side cam surface 532 in the smooth portion. Is done. The engagement piece 61 may be reciprocated and driven.

  In the embodiment of the present invention configured as described above, the driven shaft 6 constituting the cam means 1a is formed on the cam body 5 (5a to 5c) in conjunction with the rotation of the motor driving means 1b. The cam device (cam means 1a) having an output shaft according to the present invention moves the cam body 5 into a disc-shaped bottom 51 and a cylindrical tube. The portion 52 is configured to be substantially U-shaped in cross section, and is accommodated in the casing 2 so as to be connectable to the rotation of the motor driving means 1b via the bottom 51, and the driven shaft 6 is disposed on the base end side. On the other hand, the engaging piece 61 is integrally attached to the cylindrical portion 52 and disposed at the center of the cylindrical portion 52. The front end of the engaging piece 61 can be projected and retracted from the front surface of the casing (the front surface of the bearing portion 222 of the front cap 22). In section view with bottom 51 and cylindrical tube 52 The cam surface 53 is formed in a U-shape, and a predetermined cam groove 53 a is formed on the inner peripheral wall surface of the cylindrical portion 52, so that the facing surface composed of the push side cam surface 531 and the pull side cam surface 532 is formed. The driven shaft 6 advances (protrudes) by causing the engaging piece 61 to come into sliding sliding contact with the climbing gradient formed on the driving cam surface 531 as the cam body 5 rotates. ), Driven by sliding down by the downward slope formed on the pulling side cam surface 532, driven in the backward (immersive) direction, and driven as a cam as the output shaft of the motor drive means 1b that is interlocked. Has been.

  As a result, while the driven shaft 6 is cam-driven by the cam body 5, the engaging piece 61 is moved together with the driven shaft 6 by the cam surface 53 facing the pushing side cam surface 531 and the driving side cam surface 532. The cam body can be driven without adopting the configuration in which the cam surface 53 is always urged against the cam surface 53, and the structure can be simplified by eliminating the need for a coil spring. 5 is transmitted as a thrust to the driven shaft 6 via the engagement piece 61, and the driven shaft 6 moves the engagement piece 61 to the respective cam surfaces 53 of the push side cam surface 531 and the drive side cam surface 532. By sliding and guiding along, the cam can be driven not only by reciprocating movement but also by revolving movement, so that it can be connected to an arbitrary work body instead of the rotation output shaft of the motor driving means 1b to be connected. It can function as an output shaft of the cam drive motor 1 that can be connected and moved forward and backward, and the cam body 5 accommodated in the casing 2 has an operation curve of arbitrary rotation such as half rotation, one rotation, and two rotations. It is easy to select and adopt variously modified cam shapes with a corresponding arbitrary length of cam stroke, and has the optimum cam means 1a corresponding to the cam drive required by the work body. The cam drive motor 1 can be made to function only by interlocking connection with the motor drive means 1b.

  Further, the driven shaft 6 has a cam groove 53a formed in an annular shape with respect to the inner peripheral wall surface of the cam cylinder portion 52, and the engagement piece 61 goes around the cam groove 53a to drive the cam. Since the driven shaft 6 is simply connected to a workpiece that is repeatedly opened / closed and retracted with intermittent operation, the driven piece 6 can be driven by reciprocating movement of the engagement piece 61 and driven by circular movement. It is possible to function as a cam drive motor 1 that can perform cam drive control.

  In the driven shaft 6, the cam groove 53 a has a start portion and an end portion, and the engagement piece 61 reciprocates along the forward / reverse rotation of the cam body 5 in the section from the start portion to the end portion. Therefore, the pair of engagement pieces 61 are formed in the two cam grooves 53a and 53a formed by causing the driven shaft 6 to be symmetrically opposed to each other with a similar cam shape as a set. , 61 can be reciprocated in the section from the start to the end by sliding contact guidance in a state where both ends are engaged and the axial misalignment is reduced. The cam drive motor 1 can perform the cam drive control by the forward / reverse drive.

  Further, the cam surface 53 is formed with a smooth portion in an intermediate region from the start portion to the end portion, and the first cam drive formed between the start portion and the smooth portion with the smooth portion as an intermediate point. And the second cam drive region formed between the smooth portion and the end portion. The driven shaft 6 has the engagement piece 61 along the cam groove 53a of the first cam drive region. Since it is configured to drive the cam by a combination setting of the reciprocating movement and the reciprocating movement along the cam groove 53a of the second cam driving area, the driven shaft 6 has a cam stroke area between the start part and the end part. By using the different cam shapes formed in the above, it is possible to function as a cam drive motor 1 applied to a work requiring complex cam drive control.

  Further, since the cam body 5 is configured as the cam drive motor 1 integrally formed with the rotor collar 42, the rotation transmission output shaft (main shaft) that has been conventionally provided is arranged on the shaft core of the rotor 4. As a result, the insertion hole 41 formed in the shaft core region can be used as a region that is separated from the rotation of the rotor 4 and is not transmitted, and the guide shaft 81 is disposed. In addition, it is possible to guide and support the base side of the driven shaft 6 with various configurations, such as setting the moving stroke area of the driven shaft 6 by disposing the engaging piece 61, and driving the cam means 1a and the motor. The interlocking connection structure with the means 1b is simplified, and it is possible to realize long stroke cam driving following various cam shapes as well as use of the entire circumference of the cam surface.

  Furthermore, since the rotor 4 and the cam body 5 are integrally connected, the rotor 4 is configured to rotatably support the base end side and the distal end side to which the cam body 5 is connected, that is, The cam body 5 is configured such that the proximal end side of the rotor 4 is rotatably supported by the bush 71 and the distal end side is rotatably supported via a holding body 72 that is in sliding contact with the outer peripheral surface of the connected cam body 5. It can be pivoted as part of the rotor 4.

Further, the guide means can use the insertion hole 41 to configure the driven shaft (output shaft) 6 with bearing portions 222 and 8 (8a) that guide and support the distal end side and the proximal end side, respectively. Yes.
For example, the bearing body 8 on the base end side is fixed to the rear surface of the casing 2 whose base end portion is the center of the cylindrical hole of the yoke 3, and the cam body is inserted through the insertion hole 41 formed on the shaft core of the rotor 4. 5 and a guide hole 82 formed in the axis of the driven shaft 6 inserted into the guide shaft 81. The driven shaft 6 is formed in the guide hole 82 formed in itself. The inside of the guide shaft 81 can be used as a movable guide support structure separated from the rotation of the rotor 4, and the distal end of the engagement piece 61 can be connected to the holding body 72 on the base end side. Bearings can be provided without using the guide means that abuts against the inner wall surface to regulate blurring, and the guide shaft 81 can also be used as a fixing member for fixing the bush 71.

  Alternatively, the guide shaft 81a extended to be inserted into the insertion hole 41 formed in the shaft core of the rotor on the base end side of the driven shaft 6 on the base end side bearing portion 8a, and the guide shaft 81a It can also be constituted by a ring-shaped bush 82a provided at the shaft core of the cam body 5 to support the guide, and the inside of the insertion hole 41 can be used as a guide stroke area of the guide shaft 81a. On the base end side, the bearing can be supported without using the guide means that regulates the blur by bringing the front end of the engagement piece 61 into contact with the inner wall surface of the holding body 72.

  In this manner, by using the insertion hole 41, the driven shaft 6 is pivotally supported between the bearing portions 222 and 8 (8a) and guided and supported, whereby the bearing portion 8 (8a) is placed in the cam body 5. Thus, the driven shaft 6 can be supported on the base end side, and even if a load due to a side load is applied to the driven shaft 6, the load is connected to the engagement piece 61 disposed between the shafts. It is possible to avoid the propagation to the engagement (sliding contact) with the cam surface 53 and to perform smooth cam driving. As a result, even if the length of the engagement piece 61 is set so long that the engagement with the cam surface 53 is away from the axis of the driven shaft 6, no load is applied due to the misalignment of the axis, and the cam body 5 The cam surface can be realized by increasing the diameter and setting the circumferential surface area to be a cam surface to be a long stroke, and by engaging the engagement piece 61 with the cam surface 53 in a cantilever manner. Since the cam drive which goes around the circumferential surface area of 53 in a spiral shape can be performed, and the length between the shafts of the driven shaft 6 can be easily changed, the cam body 5 (5a) The cam body 5 can be formed in a cam shape with increased undulations, the length width of the cylindrical portion 52 of the cam body 5 can be arbitrarily set, and the cam surface 53 of the facing cam shape that makes extensive use of the inner peripheral wall surface can be formed.

Further, the driven shaft 6 has a base end portion fitted to a columnar base 62 and an engagement piece 61 that is slidably engaged with the cam surface 53 is provided on the base 62. When the cam surface 53 requires a distance from the shaft center, the length of the engagement piece 61 can be set short to reduce the load dispersion and smoothly follow the rotation of the rotor 4. It can be converted into an advance / retreat displacement of the shaft 6.

It is the whole longitudinal section block diagram of the cam drive motor with which the cam means and the motor drive means were integrated. It is the front side view of a cam drive motor similarly. It is a rear side view of a cam drive motor similarly. The longitudinal cross-section whole block diagram of the cam drive motor which shows the other Example of a guide means. (A) is a developed view showing a similar cam shape facing each other, (B) is a developed view showing a spiral cam shape, and (C) is a developed view showing an annular cam shape. FIG. 6 is a partially broken explanatory perspective view of a cam drive motor showing an embodiment using the cam body of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cam drive motor 1a Cam means 1b Motor drive means 2 Casing 21 Casing main body 22 Front cap 221 Bearing member 222 Bearing part 3 Yoke 31 York block 32 Coil bobbin 33 Excitation coil 4 Rotor 41 Insertion hole 42 Rotor collar 43 Ring-shaped magnet 5 Cam Body 51 Bottom 52 Tube 53 Cam surface 531 Push-side cam surface 532 Pull-side cam surface 53a Cam groove 6 Drive shaft 61 Engagement piece 62 Base 71 Bush 72 Holding body 8 Bearing portion 81 Guide shaft 82 Guide hole 8a Bearing portion 81a Guide shaft 82a Bush

Claims (5)

A cam body provided with a predetermined cam surface which is provided to be rotatable in conjunction with the rotation of the motor driving means to be connected and extends in the axial direction from the outer periphery of the disc-shaped bottom, and the rotation of the cam body Cam means comprising a follower shaft capable of moving forward and backward while being driven by an engagement piece that is slidably engaged along the cam surface while being guided by a predetermined guide means,
The cam means is configured such that the cam body is formed in a substantially U shape in sectional view by the bottom portion and the cylindrical tube portion, and is accommodated in a casing so as to be connectable to rotation of the motor driving means via the bottom portion. And the driven shaft is integrally attached to the proximal end side of the driven shaft and disposed at the center of the cylindrical portion, and the distal end side is configured to be retractable from the front of the casing,
By forming a predetermined cam groove on the inner peripheral wall surface of the cylindrical portion, the cam surface is configured to have a facing cam shape composed of a pushing side cam surface and a pulling side cam surface,
The driven shaft causes the engaging piece to be driven in sliding movement by an upward slope formed on the driving side cam surface in accordance with the rotation of the cam body, and driven in the forward direction. A cam provided with an output shaft, wherein the cam is driven to come in sliding movement by a downward slope formed on the surface and driven in the backward direction so as to drive the cam as the output shaft of the interlocked motor drive means apparatus. 2. The driven shaft according to claim 1, wherein the camshaft is formed in an annular shape with respect to an inner peripheral wall surface of the cam body cylinder portion except for an outer peripheral wall surface, and the engagement piece goes around the cam groove. A cam device having an output shaft, wherein the cam device is configured to drive a cam. 2. The driven shaft according to claim 1, wherein the cam groove has a start portion and an end portion, and a section from the start portion to the end portion is formed in accordance with the forward / reverse rotation of the cam body. A cam device having an output shaft, wherein the cam device is configured to be driven by reciprocating movement. The first cam formed on the cam surface is formed between the smooth portion and the smooth portion, the smooth portion being formed in an intermediate region from the start portion to the end portion. And a second cam drive region formed between the smooth portion and the end portion, and the driven shaft has the engagement piece in the cam groove of the first cam drive region. A cam apparatus having an output shaft, wherein the cam device is configured to drive the cam by a combination setting of a reciprocating movement along a reciprocating movement along a cam groove of the second cam driving region. 5. The driven shaft according to claim 1, wherein the driven shaft is formed by opposing the cam surfaces symmetrically with a similar cam shape as a pair, and the engagement pieces are provided in pairs. A cam device having an output shaft, wherein the cam device is configured to be slidably guided by both end engagement to drive the cam.