JP2017082883A - Driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device capable of simplifying replacement work of a bearing.SOLUTION: A driving device 1 includes: an input shaft member 10 having a cam part 11 and a first shaft part 12 and a second shaft part 13; a cam bearing 20; a planetary gear 30; a drive sprocket 122 having an internal gear 40; a plurality of pins 50; a first member 70 for supporting one end side of the pins 50 and for supporting the first shaft part 12 and the drive sprocket 122 in a relatively rotatable manner; a second outer peripheral side member 80 for supporting the other end side of the pins 50, and for supporting the drive sprocket 122 in a relatively rotatable manner; and a second inner peripheral side member 90 detachably fixed at the second outer peripheral side member 80, and for supporting the second shaft part 13 in a relatively rotatable manner. A first cylindrical inner peripheral surface 84 of the second outer peripheral side member 80 is formed in an inner diameter in which the input shaft member 10, the cam bearing 20 and a cylindrical part 94 can pass, in a state where the outside member and the plurality of pins 50 are supported by the first member 70 and the second outer peripheral side member 80.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a drive device.

  Patent Document 1 discloses a tool magazine including a pair of sprockets and a chain that spans the pair of sprockets. This tool magazine is a part of a drive device in which one sprocket rotates a chain, and one sprocket is driven by a magazine motor.

  Patent Document 2 discloses an input shaft coupled to a motor, an eccentric body eccentric with respect to the input shaft, an external gear incorporated around the eccentric body via a bearing, and an internal gear meshing with the external gear. An externally oscillating planetary gear reduction mechanism including a tooth gear is disclosed. By using the planetary gear speed reduction mechanism of Patent Document 2 in the drive device of Patent Document 1, the output rotation of the magazine motor is decelerated and transmitted to the sprocket.

JP 2012-200857 A JP 2005-36915 A

  However, in the externally oscillating planetary gear speed reduction mechanism of Patent Document 2 described above, the load applied to the bearing provided between the eccentric body and the external gear is large, and the replacement frequency of the bearing is high. In the technique described in Patent Document 2, when performing a bearing replacement operation, it is necessary to temporarily remove the internal gear and the external gear and replace the bearing, and then reassemble the planetary gear and the internal gear. Work man-hours in the work increase.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a drive device that can simplify the replacement work of a bearing.

  The drive device of the present invention includes a cam portion that is eccentric with respect to the input / output axis, and a first shaft portion and a second shaft portion that are centered on the input / output axis line disposed on both sides in the axial direction of the cam portion. An input shaft member, a cam bearing disposed on the outer peripheral surface of the cam portion, and an external gear supported on the outer peripheral surface of the cam bearing so as to be relatively rotatable with respect to the cam portion. A planetary gear having a plurality of through-holes, an outer member having an internal gear that is an internal gear meshing with the planetary gear, a plurality of pins inserted into the plurality of through-holes, and supporting the plurality of pins And a carrier member that is supported by the first shaft portion and the second shaft portion so as to be relatively rotatable and supports the outer member so as to be relatively rotatable. The carrier member has an end side of the pin. While supporting, the outer peripheral surface of the first shaft portion and the front A first member that supports the inner peripheral surface of the outer member in a relatively rotatable manner; a second outer peripheral member that supports the inner peripheral surface of the outer member in a relatively rotatable manner while supporting the other end of the pin; A second inner peripheral side member that is detachably fixed to the second outer peripheral side member and supports the outer peripheral surface of the second shaft portion so as to be relatively rotatable, and the second outer peripheral side member includes: When the cam portion rotates, the cam bearing has a diameter larger than the diameter of a rotation locus circle formed by a portion of the cam bearing that is farthest in the radial direction from the input / output axis, and is the largest diameter in the second outer peripheral member. A cylindrical inner peripheral surface located inward in the direction, the second inner peripheral side member includes a cylindrical portion fitted to the cylindrical inner peripheral surface, and the cylindrical inner peripheral surface includes the first member and the With the outer member and the plurality of pins supported by the second outer peripheral member, Chikarajiku member, the cam bearing and the cylindrical portion is formed can pass inside diameter.

  According to the drive device of the present invention, the second outer circumferential side member is larger than the diameter of the rotation locus circle formed by the portion of the cam bearing that is farthest in the radial direction from the input / output axis when the cam portion rotates. A cylindrical inner peripheral surface having a large diameter and located most radially inward in the second outer peripheral side member, and the outer peripheral member and the plurality of pins are arranged on the cylindrical inner peripheral surface by the first member and the second outer peripheral side member. In the supported state, the input shaft member, the cam bearing, and the cylindrical portion are formed to have an inner diameter that can pass through. Therefore, when the cam bearing is replaced, it is not necessary to remove and attach the outer member, the pin, and the planetary gear supported by the pin, so that the cam bearing replacement operation can be simplified.

It is a side view of the machine tool using the drive device in one embodiment of the present invention. It is a figure which shows the axial direction cross section of a drive device, and shows cross sections other than a motor. It is a figure which shows the magnitude relationship between the internal peripheral surface of a 1st cylinder, and the rotation locus circle of a cam bearing. It is a figure which shows the state from which the 2nd inner peripheral side member etc. were removed from the drive device shown in FIG.

(1. Schematic configuration of the driving device 1)
Hereinafter, embodiments to which a driving device according to the present invention is applied will be described with reference to the drawings. First, an outline of a machine tool 100 using a drive device 1 according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the machine tool 100 includes a machine main body 110, a tool magazine 120, and an exchange arm (not shown). In this embodiment, a horizontal machining center is taken as an example of the machine tool 100, but the present invention can also be applied to other machine tools.

  The machine main body 110 mainly includes a bed 111, a table 112, a column 113, a saddle 114, and a main shaft 115. The bed 111 is a part that becomes a base of the machine tool 100 and is arranged on the floor. The table 112 is a part where a workpiece (not shown) is arranged, and is provided so as to be movable relative to the bed 111 in the Z-axis direction. The column 113 is provided so as to be movable relative to the table 112 in the X-axis direction, and the saddle 114 is provided so as to be movable relative to the column 113 in the Y-axis direction. The main shaft 115 is rotatably provided on the saddle 114, and a tool 116 for processing a workpiece is detachably attached to the tip of the main shaft 115.

  The tool magazine 120 mainly includes a chain 121, the drive device 1 having a drive sprocket 122, a driven sprocket 123, and a plurality of tool storage portions 124. The chain 121 is an endless member that spans the drive sprocket 122 and the driven sprocket 123. The drive device 1 is a device that serves as a drive source for rotating the chain 121. The drive device 1 decelerates the output rotation of the motor 2 (see FIG. 2), which will be described later, and transmits it to the drive sprocket 122. The chain 121 rotates the drive sprocket 122. Rotate with. The driving sprocket 122 and the driven sprocket 123 are external gears that mesh with the chain 121, and the driving device 1 and the driven sprocket 123 are supported by a magazine support 111 a that is erected on the bed 111. The tool accommodating portion 124 is a portion where the tool 116 is accommodated, and is coupled to the chain 121 so as to be integrally rotatable.

  An exchange arm (not shown) exchanges the tool 116 mounted on the main shaft 115 with a tool 116 housed in one tool housing portion 124 arranged at a predetermined position. The driving device 1 rotates the driving sprocket 122 by a certain amount each time the tool 116 attached to the main shaft 115 is replaced. At this time, the chain 121 rotates by a certain amount, and the tool storage portion 124 in which the tool 116 to be replaced next is stored is disposed at the predetermined position.

(2. Configuration of the driving device 1)
Next, the configuration of the drive device 1 will be described. As shown in FIG. 2, the drive device 1 includes a motor 2, an input shaft member 10, a cam bearing 20, a planetary gear 30, a drive sprocket 122 (corresponding to an outer member) having an internal gear 40, and a plurality of drive devices 1. The pin 50 and the carrier member 60 are mainly provided.

  The motor 2 is a drive source that drives the input shaft member 10. The input shaft member 10 includes a cam portion 11, a first shaft portion 12, and a second shaft portion 13. The cam portion 11 is eccentrically arranged with respect to the input / output axis A1 that is the output rotation axis of the motor 2. The first shaft portion 12 is a shaft-like portion extending from the cam portion 11 to the one axial side (right side in FIG. 2), and the second shaft portion 13 is from the cam portion 11 to the other axial side (FIG. 2). This is a shaft-like portion extending to the left side. The first shaft portion 12 and the second shaft portion 13 are arranged coaxially with the input / output axis A1. The second shaft portion 13 is formed with a housing portion 13a capable of housing the adapter 2a connected to the motor 2, and the adapter 2a housed in the housing portion 13a and the input shaft member 10 are key-coupled.

  The cam bearing 20 is a bearing disposed on the outer peripheral surface side of the cam portion 11. The cam bearing 20 includes an inner peripheral surface into which the cam portion 11 can be press-fitted. A planetary gear 30 is disposed on the outer peripheral surface side of the cam bearing 20. The planetary gear 30 is an external gear supported by the cam portion 11 via the cam bearing 20 so as to be relatively rotatable, and rotates around the cam portion 11 as the input shaft member 10 rotates. The planetary gear 30 includes a plurality of through holes 31 formed so as to penetrate therethrough in the axial direction.

  As described above, the drive sprocket 122 is an external gear over which the chain 121 (see FIG. 1) is bridged, and a central portion in the width direction (input / output axis A1 direction, left-right direction in FIG. 2) on the inner peripheral surface of the drive sprocket 122 The internal gear 40 is integrally formed. The internal gear 40 is an internal gear that meshes with the planetary gear 30 and is arranged coaxially with the input / output axis A1. The pin 50 is a cylindrical member having a smaller diameter than the inner diameter of the through hole 31 of the planetary gear 30. One end of the pin 50 in the axial direction (the right side in FIG. 2) is fixed to the magazine support 111 a and the central portion in the axial direction is inserted into the through hole 31. A ball bearing 51 is disposed on the outer peripheral surface of the portion inserted into the through hole 31 of the pin 50, and a part of the outer peripheral surface of the ball bearing 51 abuts on the inner peripheral surface of the through hole 31.

  The carrier member 60 is a member disposed on both axial sides of the planetary gear 30, and includes a first member 70, a second outer peripheral member 80, and a second inner peripheral member 90. The first member 70 is fixed to the magazine support 111a, and a pin support hole 71 that supports one axial end of the pin 50 fixed to the magazine support 111a is formed therethrough. A first outer bearing 72 is disposed between the outer peripheral surface of the first member 70 and the inner peripheral surface of the drive sprocket 122, and the first member 70 is supported so as to be rotatable relative to the drive sprocket 122. A first inner bearing 73 is disposed between the inner circumferential surface of the first member 70 and the outer circumferential surface of the first shaft portion 12. Support for rotation.

  The second outer peripheral member 80 is disposed on the opposite side of the first member 70 with the planetary gear 30 interposed therebetween. A pin support hole 81 that supports the other axial end of the pin 50 (the left side in FIG. 2) is recessed in the second outer peripheral member 80, and the pin 50 inserted into the pin support hole 81 and the second outer peripheral member. 80 is fixed by a bolt. A second outer peripheral bearing 82 is disposed between the outer peripheral surface of the second outer peripheral member 80 and the inner peripheral surface of the drive sprocket 122, and the second outer peripheral member 80 is supported by the drive sprocket 122 so as to be relatively rotatable. The

  Here, the relationship between the 2nd outer peripheral side member 80 and the cam part 11 is demonstrated. As shown in FIG. 3, for convenience of explanation, when the cam portion 11 rotates, a rotation locus circle C formed by a portion P of the cam bearing 20 that is farthest radially outward from the input / output axis A1. Let the diameter of each be “diameter D1”. That is, the rotation locus circle C has a diameter D1 that is twice the distance L between the input / output axis A1 and the portion P of the cam bearing 20 that is farthest radially outward from the input / output axis A1, and the input / output axis A1 is It is a virtual circle with the center.

  The second outer peripheral member 80 includes a first cylindrical inner peripheral surface 84 having an inner diameter D2 larger than the diameter D1, and a second cylindrical inner peripheral surface 85 having an inner diameter larger than the inner diameter D2 of the first cylindrical inner peripheral surface 84. Is provided. The first cylinder inner peripheral surface 84 is formed on the side closer to the first member 70 than the second cylinder inner peripheral surface 85, and is located most radially inward in the second outer peripheral side member 80.

  The second inner peripheral member 90 is disposed on the inner peripheral side of the second outer peripheral member 80 on the opposite side of the first member 70 across the planetary gear 30. A second outer peripheral member 80 is fixed to the second inner peripheral member 90 so as to be detachable and integrally rotatable with a bolt, and the motor 2 is detachably fixed with a bolt. A second inner peripheral side bearing 93 is disposed between the inner peripheral surface of the second inner peripheral side member 90 and the outer peripheral surface of the second shaft portion 13, and the second inner peripheral side member 90 is connected to the second shaft portion 13. The outer peripheral surface is supported so as to be relatively rotatable.

  The second inner circumferential side member 90 includes a cylindrical portion 94 that can be fitted to the first cylindrical inner circumferential surface 84 and a flange portion that is larger in diameter than the cylindrical portion 94 and can be fitted to the second cylindrical inner circumferential surface 85. 95. In the cylindrical portion 94, the length of the outer peripheral surface in the axial direction is equal to the length of the first cylindrical inner peripheral surface 84 in the axial direction. Further, the length dimension in the axial direction of the flange portion 95 is equivalent to the length dimension in the axial direction of the second cylindrical inner peripheral surface 85. The second inner peripheral side member 90 has the cylindrical portion 94 fitted to the first cylindrical inner peripheral surface 84 and the flange portion 95 fitted to the second cylindrical inner peripheral surface 85, and the flange portion 95 is bolted to the second outer peripheral surface. It is connected to the side member 80 so as to be integrally rotatable.

  In the carrier member 60, the inner peripheral surfaces of the first member 70 and the second inner peripheral side member 90 are connected to the first shaft of the input shaft member 10 via the first inner peripheral side bearing 73 and the second inner peripheral side bearing 93. The outer peripheral surface of the part 12 and the second shaft part 13 is supported so as to be relatively rotatable. Thus, the carrier member 60 is disposed coaxially with the input / output axis A1. Further, the first member 70 and the second outer peripheral side member 80 can relatively rotate the inner peripheral surface of the drive sprocket 122 on the outer peripheral surface thereof via the first outer peripheral side bearing 72 and the second outer peripheral side bearing 82. To support. Thereby, the internal gear 40 is arrange | positioned coaxially with the input-output axis A1.

  The plurality of pins 50 are supported by the first member 70 and the second outer peripheral member 80 on both sides in the axial direction, and support the planetary gear 30 in the central portion of the pin 50 in the axial direction. The planetary gear 30 is supported by the first member 70 and the second outer peripheral side member 80 via a plurality of pins 50, and the carrier member 60 regulates the displacement of the planetary gear 30 in the axial direction.

(3. Operation of the driving device 1)
Next, the operation of the driving device 1 will be described with reference to FIG. When the motor 2 is driven, the output rotation of the motor 2 is transmitted to the input shaft member 10 via the adapter 2a. Thus, the cam portion 11 rotates at a position eccentric with respect to the input / output axis A1, and the planetary gear 30 supported so as to be relatively rotatable with respect to the cam portion 11 revolves at a position eccentric with respect to the input / output axis A1 ( Swing). Since the planetary gear 30 is supported by a plurality of pins 50 fixed to the magazine support 111a, the internal gear 40 that meshes with the planetary gear 30 revolves around the input / output axis A1 of the planetary gear 30, Rotates around the input / output axis A1. Thus, the output rotation of the motor 2 is decelerated and output to the internal gear 40, and the drive sprocket 122 integrally formed with the internal gear 40 rotates (spins) around the input / output axis A1.

(4. Replacement procedure of cam bearing 20)
Next, the replacement procedure of the cam bearing 20 will be described with reference to FIG. In the drive device 1, the load applied to the cam bearing 20 is larger than that of other bearings and the replacement frequency is high. On the other hand, in the drive device 1, the cam bearing 20 can be replaced without removing the drive sprocket 122, the pin 50, and the planetary gear 30. In the following, the replacement procedure will be described.

  As shown in FIG. 4, when the cam bearing 20 is replaced, the bolt that connects the second outer peripheral member 80 and the second inner peripheral member 90 is removed, and the second inner peripheral member 90 is attached to the magazine support 111a. Pull out to the opposite side (left side in FIG. 4, the other side in the direction of the input / output axis A1). At this time, since the motor 2 is connected to the second inner peripheral side member 90, the second inner peripheral side member 90 is integrated with the motor 2 by pulling the motor 2 to the opposite side of the magazine support portion 111a. Can be pulled out.

  At this time, since the adapter 2 a connected to the motor 2 and the input shaft member 10 are key-coupled, the input shaft member 10 is pulled out integrally with the second inner peripheral side member 90. The input shaft member 10 is attached with a cam bearing 20 being press-fitted to the outer peripheral side of the cam portion 11, and the cam bearing 20 is restricted from being displaced in the axial direction with respect to the cam portion 11. Therefore, the cam bearing 20 is pulled out integrally with the input shaft member 10 by pulling out the second inner peripheral side member 90. The first cylindrical inner peripheral surface 84 located radially inward in the second outer peripheral member 80 has an inner diameter D2 larger than the diameter D1 of the rotation locus circle C of the cam bearing 20 (see FIG. 3), the cam bearing 20 and the second outer peripheral member 80 can be prevented from interfering with each other when the cam bearing 20 is pulled out.

  Thus, the inner diameter of the first cylindrical inner peripheral surface 84 is such that the input shaft member 10 and the cam bearing 20 are in a state where the drive sprocket 122 and the plurality of pins 50 are supported by the first member 70 and the second outer peripheral member 80. And the cylindrical part 94 of the 2nd inner peripheral side member 90 is formed so that passage is possible. Therefore, in the drive device 1, the connection between the second outer peripheral side member 80 and the second inner peripheral side member 90 is released, and the second inner peripheral side member 90 is pulled out from the drive device 1 to the opposite side of the magazine support 111a. Thus, the cam bearing 20 can be pulled out integrally with the second inner peripheral side member 90.

  After the cam portion 11 is pulled out from the drive device 1, the cam bearing 20 press-fitted into the cam portion 11 is removed, and a new cam bearing 20 is press-fitted into the cam portion 11. Finally, the second inner peripheral side member 90 and the like removed in the reverse order of the procedure at the time of removing the second inner peripheral side member 90 are attached, and the replacement operation of the cam bearing 20 is completed.

  As described above, in the drive device 1, the replacement operation of the cam bearing 20 can be completed while the first member 70 and the second outer peripheral member 80 are fixed to the magazine support portion 111a. Therefore, in the replacement operation of the cam bearing 20, the pin 50 supported by the first member 70 and the second outer peripheral member 80, the drive sprocket 122, and the chain 121 (see FIG. 1) spanned over the drive sprocket 122 are removed. And installation work can be made unnecessary. Further, as a result of removing the drive sprocket 122 and attaching it, the operation of arranging the internal gear 40 coaxially with the input / output axis A1 can be omitted. Therefore, the replacement work of the cam bearing 20 can be simplified, and the time required for replacement of the cam bearing 20 can be shortened.

(5. Other)
Although the present invention has been described based on the above embodiments, the present invention is not limited to the above embodiments, and various modifications and improvements can be made without departing from the spirit of the present invention. It can be easily guessed.

  For example, in the present embodiment, the case where the driving device 1 according to the present invention is used for the tool magazine 120 of the machine tool 100 has been described, but the driving device 1 may be used for other devices. Examples of other devices include a case where the outer member is used as a drive source for driving the outer member in a machine tool having an outer member such as a sprocket or an external gear spanned by a belt or chain, and other machines and devices. .

  In the above-described embodiment, the case where the cam bearing 20 is press-fitted into the cam portion 11 has been described. However, the present invention is not necessarily limited thereto, and a locking portion that protrudes radially outward from the outer peripheral surface of the cam portion 11 is provided. The cam bearing 20 disposed on the outer peripheral side of the cam portion 11 may be locked to the locking portion, thereby restricting the relative displacement of the cam portion 11 toward the one side in the axial direction. In this case, when pulling out the second inner peripheral side member 90 from the driving device 1, the input shaft member 10 is pulled out to the other side in the axial direction (the direction opposite to the side where the magazine support portion 111 a is arranged), thereby The bearing 20 is locked to the locking portion, and the cam bearing 20 can be pulled out integrally with the input shaft member 10. In this case, a locking portion may be integrally formed on the outer peripheral surface of the cam portion 11, and a retaining ring that functions as the locking portion may be mounted on the outer peripheral surface of the cam portion 11.

(6. Effect)
The drive device 1 includes a cam portion 11 that is eccentric with respect to the input / output axis A1, and a first shaft portion 12 and a second shaft portion 13 that are centered on the input / output axis A1 disposed on both sides of the cam portion 11 in the axial direction. And an external gear supported on the outer peripheral surface of the cam bearing 20 so as to be relatively rotatable with respect to the cam portion 11. An outer member as a drive sprocket 122 having a planetary gear 30 having a plurality of through holes 31 penetratingly formed in the direction, an internal gear 40 that is an internal gear meshing with the planetary gear 30, and inserted into the plurality of through holes 31 A plurality of pins 50, and a carrier member 60 that supports the plurality of pins 50, is supported by the first shaft portion 12 and the second shaft portion 13 so as to be relatively rotatable, and supports the outer member so as to be relatively rotatable. Is provided.

  In addition to this, the carrier member 60 supports the one end side of the pin 50 and supports the outer peripheral surface of the first shaft portion 12 and the inner peripheral surface of the outer member so as to be relatively rotatable, While supporting the other end side, the second outer peripheral side member 80 that supports the inner peripheral surface of the outer member so as to be relatively rotatable, and the second outer peripheral side member 80 are detachably fixed, and And a second inner peripheral side member 90 that supports the outer peripheral surface so as to be relatively rotatable.

  Furthermore, the second outer peripheral side member 80 is larger than the diameter D1 of the rotation locus circle C formed by the portion P that is farthest in the radial direction from the input / output axis A1 in the cam bearing 20 when the cam portion 11 rotates. The second inner peripheral side member 90 has a large inner diameter and includes a cylindrical inner peripheral surface as the first cylindrical inner peripheral surface 84 that is located at the innermost radial direction in the second outer peripheral side member 80. A cylindrical portion 94 fitted to the surface 84, and the cylindrical inner peripheral surface of the input shaft member 10, with the outer member and the plurality of pins 50 supported by the first member 70 and the second outer peripheral side member 80, The cam bearing 20 and the cylindrical portion 94 are formed in an inner diameter D2 through which the cam bearing 20 and the cylindrical portion 94 can pass.

  According to the drive device 1, the second outer peripheral side member 80 has a rotation locus circle C formed by a portion P farthest in the radial direction from the input / output axis A <b> 1 of the cam bearing 20 when the cam portion 11 rotates. Of the second outer peripheral side member 80 is provided with a cylindrical inner peripheral surface as the first cylindrical inner peripheral surface 84 that is located most radially inward, The member 70 and the second outer peripheral member 80 are formed to have an inner diameter D2 through which the input shaft member 10, the cam bearing 20, and the cylindrical portion 94 can pass while the outer member as the drive sprocket 122 and the plurality of pins 50 are supported. Is done. Therefore, when the cam bearing 20 is replaced, the outer member, the pin 50, and the operation of removing and attaching the planetary gear 30 supported by the pin 50 can be eliminated. Therefore, the replacement work of the cam bearing 20 can be simplified, and the time required for the replacement work of the cam bearing 20 can be shortened.

  Further, in the driving device 1, the cam bearing 20 is restricted from being displaced at least in one axial direction by the cam portion 11 in a state where the cam bearing 20 is disposed on the outer peripheral surface of the cam portion 11. According to this drive device 1, the cam bearing 20 is removed integrally with the cam portion 11 by removing the input shaft member 10 from the drive device 1 while being pulled out to the other side in the axial direction. Therefore, the replacement work of the cam bearing 20 can be further simplified.

  Further, in the driving device 1, the cam portion 11 is attached in a state of being press-fitted into the cam bearing 20. According to this drive device 1, the cam bearing 20 can be removed integrally with the cam portion 11 by removing the input shaft member 10 from the drive device 1. Therefore, the replacement work of the cam bearing 20 can be further simplified.

  Further, in the drive device 1, the input shaft member 10 includes a locking portion that protrudes radially outward from the outer peripheral surface of the cam portion 11, and the cam bearing 20 is locked in the locking portion in the axial direction. Displacement to one side is restricted. According to this drive device 1, when the input shaft member 10 is removed from the drive device 1 while being pulled out to the other side in the axial direction, the cam bearing 20 locked to the locking portion can be removed integrally with the cam portion 11. it can. Therefore, the replacement work of the cam bearing 20 can be further simplified.

  Further, in the drive device 1, the outer member is a sprocket that is used in the tool magazine 120 of the machine tool 100 and that serves as a drive sprocket 122 that rotatably drives the chain 121 or the belt. According to this drive device, when the cam bearing 20 is replaced, the operation of removing and attaching the chain 121 or the belt spanned on the drive sprocket 122 is not necessary, so that the replacement operation of the cam bearing 20 can be simplified.

DESCRIPTION OF SYMBOLS 1: Drive apparatus, 10: Input shaft member, 11: Cam part, 12: 1st shaft part, 13: 2nd shaft part, 20: Cam bearing, 30: Planetary gear, 31: Through-hole, 40: Internal gear 50: Pin, 60: Carrier member, 70: First member, 80: Second outer peripheral member, 84: First cylindrical inner peripheral surface (cylindrical inner peripheral surface), 90: Second inner peripheral member, 94: Cylindrical part, 100: Machine tool, 120: Tool magazine, 121: Chain, 122: Drive sprocket (outer member), A: Input / output axis

Claims (5)

An input shaft member having a first shaft portion and a second shaft portion centered on the input / output axis line disposed on both sides in the axial direction of the cam portion;
A cam bearing disposed on the outer peripheral surface of the cam portion;
An external gear supported on the outer peripheral surface of the cam bearing so as to be relatively rotatable with respect to the cam portion, and a planetary gear having a plurality of through holes formed in an axial direction;
An outer member having an internal gear that is an internal gear meshing with the planetary gear;
A plurality of pins inserted into the plurality of through holes;
A carrier member that supports the plurality of pins, is rotatably supported by the first shaft portion and the second shaft portion, and supports the outer member so as to be relatively rotatable;
With
The carrier member is
A first member that supports the outer peripheral surface of the first shaft portion and the inner peripheral surface of the outer member so as to be relatively rotatable while supporting one end of the pin;
A second outer peripheral side member that supports the inner peripheral surface of the outer member so as to be relatively rotatable while supporting the other end side of the pin;
A second inner peripheral side member that is detachably fixed to the second outer peripheral side member and supports the outer peripheral surface of the second shaft portion so as to be relatively rotatable;
With
The second outer peripheral member has a larger diameter than a diameter of a rotation locus circle formed by a portion of the cam bearing that is farthest in the radial direction from the input / output axis when the cam portion rotates, A cylindrical inner peripheral surface positioned most radially inward in the second outer peripheral side member;
The second inner peripheral side member includes a cylindrical portion fitted to the cylindrical inner peripheral surface,
The cylindrical inner peripheral surface allows the input shaft member, the cam bearing, and the cylindrical portion to pass through in a state where the outer member and the plurality of pins are supported by the first member and the second outer peripheral side member. A drive device formed on the inner diameter.   2. The drive device according to claim 1, wherein the cam bearing is restricted from displacement at least in one axial direction by the cam portion in a state where the cam bearing is disposed on an outer peripheral surface of the cam portion.   The drive device according to claim 2, wherein the cam portion is attached in a state of being press-fitted into the cam bearing. The input shaft member includes a locking portion that protrudes radially outward from the outer peripheral surface of the cam portion,
The drive device according to claim 2, wherein the cam bearing is restrained from being displaced in one axial direction by being latched by the latching portion.   The drive device according to any one of claims 1 to 4, wherein the outer member is a sprocket that is used in a tool magazine of a machine tool and that rotatably drives a chain or a belt.

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