JP2020060248A - Barrel cam device - Google Patents

Abstract

To provide a barrel cam device in which cost is suppressed.SOLUTION: A barrel cam device includes: a rotary member 20 including a plurality of cam followers 24; a support part 30 for supporting the rotary member in a rotatable manner; and a barrel cam 10 for rotating the rotary member by rotating being engaged with the cam followers. The support part includes a cam follower contact part 32a for supporting the rotary member by coming into contact with the side surfaces of the cam followers.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a barrel cam device.

  A barrel cam device having an output table including a plurality of cam followers, a support portion that rotatably supports the output table, and a barrel cam that rotates the output table by engaging with the cam followers to rotate the barrel table is already well known. (For example, see Patent Document 1).

JP, 2014-070718, A

  In the conventional barrel cam device, an expensive bearing such as a cross roller bearing or a four-point contact ball bearing is used to support the output table, which causes a cost increase.

  The present invention has been made in view of such problems, and an object of the present invention is to realize a barrel cam device whose cost is suppressed.

  A main invention for achieving the above object is to provide a rotating member having a plurality of cam followers, a support portion that rotatably supports the rotating member, and a rotating portion by engaging with the cam follower and rotating the rotating member. A barrel cam device having a rotating barrel cam, wherein the support portion has a cam follower contact portion that supports the rotating member by contacting a side surface of the cam follower.

  Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

  According to the present invention, it is possible to realize a barrel cam device whose cost is suppressed.

FIG. 3 is a plan view and a perspective view of the barrel cam device 1. It is an explanatory view of barrel cam 10 and drive gear 40. It is an explanatory view of the output table 20 and the rotating body support part 30. It is a figure showing the contact state of cam follower 24 and cam follower contact part 32a concerning this embodiment. It is a figure showing the contact state of cam follower 24 and cam follower contact part 132a concerning a 2nd embodiment.

  At least the following matters will be made clear by the description in the present specification and the accompanying drawings.

  A barrel cam device comprising: a rotating member having a plurality of cam followers; a support portion that rotatably supports the rotating member; and a barrel cam that engages with the cam follower and rotates to rotate the rotating member. The barrel cam device, wherein the support portion has a cam follower contact portion that supports the rotating member by contacting a side surface of the cam follower.

  According to such a barrel cam device, it is possible to realize a barrel cam device with reduced cost.

  In such a barrel cam device, the cam follower contact portion receives a load of the rotating member along an orthogonal direction orthogonal to a rotation axis direction of the rotating member, and the support portion applies a load along the rotation axis direction. It is desirable to have a roller member for receiving.

  According to such a barrel cam device, the bearing performance of the barrel cam device can be further improved.

  In such a barrel cam device, all the cam followers of the plurality of cam followers are in contact with the cam follower contact portion, and the cam followers are in contact with the engagement cam followers with which the barrel cams of the plurality of cam followers are engaged. It is desirable that the contact pressure with which the portions contact each other is smaller than the contact pressure with which the cam follower contact portion contacts the disengaged cam follower with which the barrel cam is not engaged.

  According to such a barrel cam device, the engaging cam follower can smoothly rotate on its axis in accordance with the engagement state with the cam groove.

  In such a barrel cam device, the cam follower contact portion is in contact with a non-engaging cam follower in which the barrel cam is not engaged among the plurality of cam followers, and the engaging cam follower in which the barrel cam is engaged is It is desirable that the cam follower contact part is not in contact.

  According to such a barrel cam device, the engagement cam follower can rotate more smoothly according to the engagement state with the cam groove.

=== Regarding the barrel cam device 1 according to the present embodiment ===
The barrel cam device 1 according to the present embodiment is a device in which rotation input to the barrel cam 10 is output as rotation of an output table 20 (corresponding to a rotating member) having a rotation axis in a direction intersecting the axial direction of the barrel cam 10. Is.

  The barrel cam device 1 will be described below with reference to FIGS. 1 to 4. In the drawings according to the present embodiment, members may be omitted as appropriate in order to facilitate understanding of the present invention.

  FIG. 1 is a plan view and a perspective view of the barrel cam device 1, with an upper view showing a plan view and a lower view showing a perspective view. In addition, in the perspective view, a part thereof is a cross-sectional view, and the cross-sectional view shows an internal structure of the barrel cam device 1.

  FIG. 2 is an explanatory view of the barrel cam 10 and the drive gear 40. The left diagram shows a side sectional view of the barrel cam 10 taken along the line AA in FIG. 1, and the right diagram shows the arrow B. The side sectional view of the drive gear 40 which is -B is shown.

  FIG. 3 is an explanatory diagram of the output table 20 and the rotating body supporting portion 30 (corresponding to a supporting portion), and shows a side cross-sectional view of the output table 20 and the rotating body supporting portion 30 which is a view CC in FIG. ing.

  FIG. 4 is a view showing a contact state between the cam follower 24 and the cam follower contact portion 32a according to the present embodiment, which is a view taken along the line DD in FIG.

  In addition, in the present embodiment, the three directions orthogonal to each other are referred to as the X direction, the Y direction, and the Z direction, respectively, and the X direction and the Y direction respectively face the horizontal direction, and the Z direction faces the vertical direction. ing. The left side (right side) of the paper surface is called the left (right) with the horizontal direction of the paper surface in the plan view of FIG. 1 as the X direction, and the upper side (lower side) of the paper surface is the back (front) with the vertical direction of the paper surface as the Y direction. Call. In addition, the vertical direction of the paper surface in the side view (side cross-sectional view) of FIG.

  As shown in FIG. 1, the barrel cam device 1 includes a housing 3, a motor 5, a speed reducer 7, a barrel cam 10, an output table 20, a rotating body support portion 30, and a drive gear 40. The barrel cam 10, the output table 20, the rotor support portion 30, and the drive gear 40 are provided inside the housing 3.

  The motor 5 and the speed reducer 7 are provided outside the right side of the housing 3. The motor 5 is a power source of the barrel cam device 1, and the speed reducer 7 reduces the rotation speed of the motor 5 to reduce the speed. This device transmits the rotation to the inside of the housing 3 (drive gear 40). That is, the motor 5 is provided so as to transmit the rotation to the inside of the housing 3 via the speed reducer 7.

  The barrel cam 10 is a portion that rotates using the motor 5 as a drive source and rotates the output table 20 by the rotation, and includes a cam shaft 12 and a shaft portion support 14.

  As shown in FIG. 2, the cam shaft 12 has a cam portion 12a and a shaft portion 12b, and the cam portion 12a is provided with a spiral cam groove 13 along the axial direction. . Then, shaft portions 12b are provided at both end portions in the axial direction of the cam portion 12a so as to rotate integrally with the cam portion 12a (cam groove 13).

  The shaft portion 12b is rotatably supported by the shaft portion support 14 fixed to the housing 3 with the direction along the X direction as the rotation axis. That is, the cam portion 12a (cam groove 13) that rotates integrally with the shaft portion 12b is also rotatably supported with the direction along the X direction as the rotation axis.

  A drive gear 40 (a cam gear 44 described later) is attached to the shaft portion 12b located on the right side of the cam portion 12a so as to rotate integrally with the shaft portion 12b. That is, when the motor 5 is driven and rotated, the rotation is transmitted in the order of the motor 5, the speed reducer 7, the drive gear 40, the shaft portion 12b, and the cam portion 12a (cam groove 13), and the cam shaft 12 of the barrel cam 10 rotates.

  The output table 20 is a portion that receives the rotation of the barrel cam 10 as a rotation axis in the direction along the Z direction and rotates, and outputs the rotation. The output table 20 includes a rotating body 22 and a plurality of cam followers 24.

  The rotator 22 is rotatably supported by the rotator support portion 30 with the direction along the Z direction as a rotation axis, and includes a table 22a and a rotator roller contact portion 22b.

  As shown in FIGS. 1 and 3, the table 22 a is an upper surface portion of the rotating body 22 exposed to the outside of the housing 3, rotates with the rotation of the rotating body 22, and the rotation becomes an output of the output table 20. .

  That is, for example, when an article placed in the 0 o'clock direction of the table 22a in the plan view of FIG. 1 moves to the 3 o'clock direction along the circumferential direction by the rotation of the table 22a, the article is moved along the circumferential direction. The movement in the direction of 3 o'clock becomes the output of the output table 20, and the accuracy of the position after the movement becomes the output accuracy. Therefore, the smaller the deviation from the original position after the movement of the article, the higher the output accuracy (high-accuracy output), that is, the higher the accuracy of the apparatus.

  The rotating body roller contact portion 22b is a portion with which a roller 34 (a member that supports the rotating body 22 and corresponds to a roller member) described later comes into contact, and an upper surface of a portion that protrudes inward at the inner peripheral portion of the rotating body 22. And provided on the lower surface, respectively.

  Specifically, as shown in FIG. 3, the inner peripheral portion of the rotating body 22 has a shape in which the inner diameter dimension gradually changes from large → small → large, and a protruding portion (inner diameter The upper rotating body roller contact portion 22b is provided on the upper surface of the small portion), and the lower rotating body roller contact portion 22b is provided on the lower surface.

  The cam follower 24 is a portion that engages with the cam groove 13, is a cylindrical rotatable body, and is provided such that the rotation axis direction is parallel to the rotation axis direction of the rotation body 22. As shown in FIG. 1, FIG. 3, and FIG. 4, a plurality of pieces are provided on the lower surface of the rotating body 22 at equal intervals along a circle centered on the rotation axis of the rotating body 22. In the present embodiment, 10 cam followers 24 are provided at equal intervals (10 at every 36 degrees).

  Further, the cam follower 24 is engaged with the cam groove 13 of the barrel cam 10 on the front side of the rotary body 22, and the engaged cam follower 24 is guided by the cam groove 13 to rotate and move.

  Specifically, when the barrel cam 10 rotates counterclockwise when viewed from the right side, the engaged cam followers 24 are guided by the spiral cam groove 13 and are moved from the right side to the left side along the circumferential direction of the rotating body 22. Move to. That is, the output table 20 rotates clockwise when viewed from above. That is, the barrel cam 10 rotates by engaging with the cam follower 24 to rotate the output table 20.

  In general, in order to make the rotation of the output table highly accurate, that is, to realize highly accurate output, the cam follower and the cam groove are provided with high accuracy so that no gaps or the like are generated during engagement. Has been.

  This is the same in the present embodiment as well, and the cam groove 13 is processed with high accuracy and precision, and the ten cam followers 24 are each processed with high accuracy and assembled, and It is equipped with high-precision positioning.

  The rotator supporting portion 30 rotatably supports the output table 20, and in the present embodiment, the load along the rotation axis direction of the output table 20 (the load along the vertical direction. (Also referred to as “)” and a load along the orthogonal direction orthogonal to the rotation axis direction of the output table 20 (a load along the horizontal direction; hereinafter, also referred to as a horizontal load), and is a portion that supports the output table 20. . The rotating body support portion 30 is a member (independent) different from the barrel cam 10.

  The rotating body support portion 30 includes a support ring 32, a plurality of rollers 34, a holding ring 36 that holds the plurality of rollers 34, and a fixing member 38 that supports the rollers 34 and the like.

  The support ring 32 is fixed to the housing 3, and has a cam follower contact portion 32 a that contacts the cam follower 24 and a support ring roller contact portion 32 b that contacts the roller 34.

  As shown in FIGS. 3 and 4, the cam follower contact portion 32 a is the outer peripheral surface of the support ring 32, and the outer peripheral surface is in contact with the side surfaces of all the cam followers 24 below the output table 20. When the cam rotates, it is in contact with all the cam followers 24. That is, all the cam followers 24 are always in contact with the cam follower contact portion 32a.

  Further, since the cam follower contact portion 32a is the outer peripheral surface of the support ring 32, it comes into contact with the cam follower 24 so as to be inscribed. The term “inscribed” as used herein means that the outer peripheral surface of each cam follower 24 on the side closer to the rotation center of the output table 20, that is, the outer peripheral surface of the cam follower 24 located on the inner side in the radial direction of the rotating body 22, is the cam follower contact portion. 32a.

  Then, since the cam follower contact portion 32a contacts the cam follower 24 in such a state, the cam follower contact portion 32a can rotatably support the output table 20 via the cam follower 24.

  Furthermore, since the cam follower contact portions 32a of the support ring 32 fixed to the housing 3 are inscribed in all the cam followers 24, the cam follower contact portions 32a limit the movement of the cam followers 24 in the horizontal direction. That is, the cam follower contact portion 32a can receive the horizontal load of the output table 20 and support the output table 20.

  Further, in the present embodiment, the contact pressures of the cam follower contact portions 32a and the individual cam followers 24 are not the same, and the cam follower contact portions 32a are in weak contact (contact pressure) with the cam followers 24 that are in strong contact (the contact pressure is large). Is small) cam follower 24.

  In the present embodiment, in order to make the contact pressure between the cam follower contact portion 32a and the cam follower 24 large and small, the radius dimension of the cam follower contact portion 32a of the support ring 32 in the component state before being attached to the housing 3 is defined as the first radius dimension. , And a second radius smaller than the first radius, and the difference in the radius causes a difference in contact pressure.

  More specifically, the first radius dimension and the second radius dimension are both larger than the dimension from the center of the rotating body 22 to the outer peripheral surface of the inscribed cam follower 24 (hereinafter, also referred to as inscribed dimension), and the support is provided. When the ring 32 is attached to the housing 3, the cam follower contact portion 32a in the component state is cooled so that the first radius dimension and the second radius dimension are smaller than the inscribed dimension, and the support ring 32 in the state is Attach to 3.

  Then, after the support ring 32 is attached, the temperature of the cam follower contact portion 32a rises, and the radial dimension of the cam follower contact portion 32a returns to the original dimension and increases, so that the cam follower contact portion 32a presses the cam follower 24. Will come into contact.

  That is, since the cam follower contact portion 32a of the first radius dimension (second radius dimension) has a large (small) return dimension, it comes into contact with the cam follower 24 while pressing it strongly (weakly), and the cam follower 24 contacts. The cam follower 24 has a large (small) pressure.

  In the present embodiment, the cam followers 24 that are not engaged with the barrel cam 10 (hereinafter also referred to as non-engaged cam followers) are used as the cam followers 24 having a large contact pressure, and the cam followers 24 that engage with the barrel cam 10 (hereinafter , Also referred to as the engaging cam follower) is the cam follower 24 having a small contact pressure.

  That is, the cam follower 24 located at the 3 o'clock position in FIG. 4 is defined as the cam follower K1, and clockwise, the cam followers K2, the cam followers K3, the cam followers K4, the cam followers K5, the cam followers K6, the cam followers K7, the cam followers K8, the cam followers K9, and the cam followers K10. In this case, the engaging cam followers are the three cam followers 24, that is, the cam follower K5, the cam follower K6, and the cam follower K7, and the cam follower 24 has a small contact pressure.

  The non-engaging cam followers are seven cam followers 24 other than the above three (cam followers K1 to K4 and cam followers K8 to K10), and the cam followers 24 having a large contact pressure.

  That is, the contact pressure at which the cam follower contact portion 32a contacts the engagement cam follower engaged with the barrel cam 10 of the plurality of cam followers 24 is the contact pressure at which the cam follower contact portion 32a does not engage with the non-engaged cam follower not engaged with the barrel cam 10. The cam follower contact portion 32a is provided so that the contact pressure becomes smaller than the contact pressure.

  The support ring roller contact portion 32b is a portion that comes into contact with the roller 34, and as shown in FIG. 3, is provided at a position facing the above-described lower rotating body roller contact portion 22b.

  The roller 34 is a member for receiving the vertical load of the output table 20, is a so-called roller (roll) having a cylindrical shape, and is provided with a plurality of rotatably with the direction along the radial direction of the support ring 32 as a rotation axis. Has been.

  Further, as described above, the rollers 34 are provided so as to come into contact with the upper and lower rotating body roller contact portions 22b of the rotating body 22, respectively. That is, as shown in FIGS. 1 and 3, a plurality of rollers 34 (hereinafter, also referred to as upper rollers) that come into contact with the upper rotating body roller contact portion 22b and a plurality of rollers that come into contact with the lower rotating body roller contact portion 22b. Roller 34 (hereinafter, also referred to as lower roller).

  Further, a fixed member roller contact portion 38a of a fixed member 38, which will be described later, is provided at a position facing the upper rotary body roller contact portion 22b. That is, the upper roller contacts the upper rotating body roller contacting portion 22b and the fixed member roller contacting portion 38a, and the lower roller contacts the lower rotating body roller contacting portion 22b and the support ring roller contacting portion 32b. To do.

  The holding ring 36 is a member for holding the roller 34, and is provided with a plurality of holding portions 36 a for holding the roller 34, and the central axis of the holding ring 36 is coaxial with the rotation axis of the rotating body 22. It is provided in.

  The holding portions 36a are spaces that penetrate the Z-direction in a substantially rectangular shape, and are provided radially from the central axis of the holding ring 36 and at equal intervals along the circumferential direction of the holding ring 36. The substantially rectangular shape of the holding portion 36a is about one size larger than the dimension of the substantially rectangular cross section (outer diameter × length) of the roller 34 (the roller 34 can be rotatably fitted to the holding portion 36a). Big enough). Further, the thickness (dimension in the Z direction) of the holding portion 36a is smaller than the outer diameter dimension of the roller 34 so that the roller 34 does not fall off the holding portion 36a.

  In other words, it is possible to rotatably hold one roller 34 with one holding portion 36a, and the roller 34 held by the holding portion 36a has a part in the Z direction, that is, in the vertical direction. It is held in a state of protruding from the holding portion 36a, and the vertically protruding portions come into contact with the upper and lower rotating body roller contact portions 22b, the support ring roller contact portion 32b, and the fixed member roller contact portion 38a.

  Then, as shown in FIG. 1, the rollers 34 are individually held by each of the plurality of holding portions 36 a, so that the plurality of rollers 34 are arranged at equal intervals along the circumferential direction of the rotating body 22. Therefore, the plurality of rollers 34 and the retaining ring 36 in this state form a so-called thrust roller bearing (the roller 34 corresponds to a rolling element and the retaining ring 36 corresponds to a retainer). That is, the thrust roller bearings formed by the plurality of rollers 34 and the retaining ring 36 are arranged on the upper and lower rotating body roller contact portions 22b of the rotating body 22, respectively.

  The fixing member 38 is a member that supports the upper roller from above, and is fixed to the support ring 32 while the fixing member roller contact portion 38a described above is in contact with the upper roller.

  That is, as shown in FIG. 3, the fixing member 38 → the roller 34 (upper roller) → the rotator 22 → the roller 34 (lower roller) → the support ring 32 are contacted in this order from the upper side, and the fixing member is overlapped. 38 is fixed to the support ring 32. That is, each of the upper roller, the rotating body 22, and the lower roller is vertically sandwiched by the fixing member 38 and the support ring 32.

  Therefore, the upper roller and the lower roller limit the movement of the rotating body 22 in the vertical direction, that is, the vertical direction of the output table 20, while rotatably supporting the rotating body 22. That is, the roller 34 can support the output table 20 by receiving the vertical load of the output table 20.

  The drive gear 40 is a portion that receives the rotation reduced by the speed reducer 7 to rotate and transmits the rotation to the barrel cam 10. The drive gear 40 includes a motor gear 42 and a cam gear 44.

  The motor gear 42 is coupled so as to rotate integrally with the rotation shaft of the speed reducer 7, and the cam gear 44 is coupled so as to rotate integrally with the shaft portion 12b of the barrel cam 10.

  Then, as shown in FIG. 2, the motor gear 42 and the cam gear 44 are meshed with each other, and the rotation of the motor gear 42 is transmitted to the cam gear 44. That is, the rotation of the motor gear 42 rotated by the drive rotation of the motor 5 via the reduction gear 7 is transmitted to the cam gear 44, and the cam gear 44 rotates the barrel cam 10 coupled so as to rotate integrally, and the rotation. This causes the output table 20 to rotate.

<<< effectiveness of barrel cam device 1 according to the present embodiment >>>
As described above, the barrel cam device 1 according to the present embodiment is configured such that the output table 20 including the plurality of cam followers 24, the rotating body support portion 30 that rotatably supports the output table 20, and the cam followers 24 are engaged. In the barrel cam device 1 having a barrel cam 10 that rotates the output table 20 by rotating, the rotating body support portion 30 contacts the side surface of the cam follower 24, and the cam follower contact portion 32a that supports the output table 20. Decided to have. Therefore, it becomes possible to realize the barrel cam device 1 whose cost is suppressed.

  In the conventional barrel cam device, an expensive bearing such as a cross roller bearing or a four-point contact ball bearing is used to support the output table, which causes a cost increase. Further, as the function (role) of the cam follower 24, only engagement (cooperation) with the barrel cam 10 and transmission of rotational movement have been assumed, so that the cam follower 24 is a member different from the barrel cam 10. There was no contact with the support 30.

  On the other hand, in the present embodiment, the cam follower 24 is brought into contact with the rotating body supporting portion 30 so that the rotating body supporting portion 30 supports the output table 20 via the cam follower 24. That is, the cam follower 24 has a plurality of functions, that is, a function of bearing as well as a function of transmitting rotational motion. As a result, it is not necessary to employ expensive bearings such as a cross roller bearing and a four-point contact ball bearing, and according to the present embodiment, it is possible to realize the barrel cam device 1 with reduced cost.

  In addition, as described above, all the cam followers 24 are fixed to the output table 20 after being subjected to highly accurate processing, positioning, and the like. Therefore, if the cam follower contact portion 32a supports the output table 20 via the cam follower 24, the bearing performance becomes good.

  Further, in the present embodiment, the cam follower contact portion 32a receives the load of the output table 20 along the orthogonal direction orthogonal to the rotation axis direction of the output table 20, and the rotor support portion 30 extends along the rotation axis direction. The roller 34 for receiving the applied load is provided.

  That is, in addition to the horizontal load, the cam follower contact portion 32a receives the load of the output table 20, and for the vertical load, the roller 34 is introduced so that the roller 34 receives the load of the output table 20. Therefore, the bearing performance of the barrel cam device 1 can be further improved.

  The thrust roller bearing using the roller 34 has a simple structure and does not require a special processing device. It is also widely distributed in the market. Therefore, even when the thrust roller bearing is used in combination with the bearing having the cam follower contact portion 32a, the cost suppressing effect can be realized.

  In addition, in the present embodiment, all the cam followers 24 of the plurality of cam followers 24 are in contact with the cam follower contact portion 32a, and the engagement cam followers of the plurality of cam followers 24 are engaged with the barrel cam 10. The contact pressure with which the cam follower contact portion 32a contacts is set to be smaller than the contact pressure with which the cam follower contact portion 32a contacts the disengaged cam follower with which the barrel cam 10 is not engaged.

  When the barrel cam 10 rotates, the engagement cam follower engaged with the cam groove 13 of the barrel cam 10 is moved along the circumferential direction of the output table 20 while rotating on its own axis. Specifically, the frictional force between the engagement cam follower and the cam groove 13 causes the engagement cam follower to rotate, and the engagement cam follower is moved along the circumferential direction of the output table 20 while rotating.

  In the present embodiment, since the contact pressure for the engagement cam follower is made smaller than the contact pressure for the non-engagement cam follower, the contact of the cam follower contact portion 32a with the engagement cam follower is between the cam groove 13 and the cam groove 13. It is possible to prevent as much as possible from interfering with the rotation motion of the frictional force. Therefore, according to such an embodiment, the engagement cam follower can smoothly rotate on its axis in accordance with the engagement state with the cam groove 13.

=== Regarding the barrel cam device 100 according to the second embodiment ===
Next, the barrel cam device 100 according to the second embodiment will be described with reference to FIG. FIG. 5 is a view corresponding to FIG. 4, and is a view showing a contact state between the cam follower 24 and the cam follower contact portion 132a according to the second embodiment.

  The difference between the present embodiment (referred to as the first embodiment) and the second embodiment is the shape of the cam follower contact portion 132a in the support ring 132, and as shown by reference numeral G in FIG. The portion 132a does not contact the engagement cam follower.

  That is, the cam follower contact portion 132a is in contact with the non-engaged cam follower of the plurality of cam followers 24 which the barrel cam 10 is not engaged with, and the cam follower contact portion 132a is in contact with the engaged cam follower with which the barrel cam 10 is engaged. I haven't. Therefore, the engagement cam follower can rotate more smoothly according to the engagement state with the cam groove 13.

  In the second embodiment, all three engaging cam followers (cam followers K5 to K7) are in non-contact with the cam follower contact portion 132a, and seven non-engaging cam followers (cam followers K1 to cam follower K4, And the cam followers K8 to K10) are all in contact with the cam follower contact portion 132a.

=== Other Embodiments ===
Although the barrel cam device 1 according to the present invention has been described based on the above-described embodiment, the above-described embodiment of the present invention is for facilitating the understanding of the present invention, and the present invention is based on the above-described embodiment. It is not limited to. The present invention can be modified and improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

  In the above embodiment, the thrust roller bearing constituted by the roller 34 and the like supports the output table 20, but the present invention is not limited to this. For example, an oil film may be provided between the roller contact portions to replace the roller 34 (thrust roller bearing), and the oil film may support the output table 20.

  Further, in the above-described embodiment, the cam follower contact portion is the outer peripheral surface of the support ring that is in contact with the cam follower 24, but the invention is not limited to this. For example, the cam follower contact portion is the inner peripheral surface of the support ring and is in external contact with the cam follower 24 (contacts with the outer peripheral surface of the outer cam follower 24 in the radial direction of the rotating body 22) so that the cam follower contact portion supports the output table 20. It doesn't matter.

  Further, in the above-described embodiment, ten cam followers 24 are provided and three of the ten cam followers are engaging cam followers, but the number is not limited to this.

1 Barrel Cam Device 3 Housing 5 Motor 7 Reducer 10 Barrel Cam 12 Cam Shaft 12a Cam Part 12b Shaft Part 13 Cam Groove 14 Shaft Support 20 Output Table (Rotating Member)
22 rotator 22a table 22b rotator roller contact portion 24 cam follower 30 rotator support portion (support portion)
32 support ring 32a cam follower contact part 32b support ring roller contact part 34 roller (roller member)
36 holding ring 36a holding part 38 fixing member 38a fixing member roller contact part 40 drive gear 42 motor gear 44 cam gear 100 barrel cam device 132 support ring 132a cam follower contact part

Claims (4)

A rotating member having a plurality of cam followers,
A supporting portion that rotatably supports the rotating member,
A barrel cam that rotates the rotating member by engaging and rotating the cam follower,
A barrel cam device having:
The barrel cam device, wherein the support portion includes a cam follower contact portion that supports the rotating member by contacting a side surface of the cam follower. The barrel cam device according to claim 1,
The cam follower contact portion receives a load of the rotating member along an orthogonal direction orthogonal to a rotation axis direction of the rotating member,
The said support part is provided with the roller member for receiving the load along the said rotating shaft direction, The barrel cam apparatus characterized by the above-mentioned. The barrel cam device according to claim 1 or 2, wherein
All the cam followers of the plurality of cam followers are in contact with the cam follower contact portion,
Of the plurality of cam followers, the contact pressure at which the cam follower contact portion makes contact with the engagement cam follower engaged with the barrel cam causes the contact pressure of the cam follower contact portion to make contact with the non-engaged cam follower not engaged with the barrel cam. A barrel cam device characterized by being smaller than the contact pressure. The barrel cam device according to claim 1 or 2, wherein
The cam follower contact portion is in contact with a non-engaged cam follower with which the barrel cam is not engaged among the plurality of cam followers, and the cam follower contact portion is in contact with the engaged cam follower with which the barrel cam is engaged. Barrel cam device characterized by not having.

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