WO2021090882A1

WO2021090882A1 - Feeding device

Info

Publication number: WO2021090882A1
Application number: PCT/JP2020/041359
Authority: WO
Inventors: 純雄菅原
Original assignee: Ｓｋマシナリー株式会社
Priority date: 2019-11-08
Filing date: 2020-11-05
Publication date: 2021-05-14
Also published as: JP7389999B2; JP2021076189A

Abstract

Provided is a feeding device which has a simple construction satisfying long-distance conveying, high-speed conveying, quietness, and high precision, and which does not require a high degree of assembly accuracy. This feeding device includes a rotating rotor 143 having, on an outer circumferential surface, a winding portion onto which a wire 151 is wound, and having, on an inner circumferential surface, a female screw 144, a supporting structure which rotatably supports a motor 121, a rotating shaft 132, a spline nut 134, and the rotating rotor 143, and a feed screw member 200 having a feed screw 201 which meshes with the female screw 144 of the rotating rotor 143, wherein the feed screw member 200 is supported by the supporting structure in such a way that the feed screw 201 meshes with the female screw 144 of the rotating rotor 143, and is configured in such a way that, when the rotating rotor 143 rotates once, the rotating rotor 143 is translated along the axis of rotation by an amount equivalent to the pitch of one winding of the wire 151.

Description

Feeder

The present invention relates to a feeding device. The present invention claims the priority of application number 2019-203444 of the Japanese patent filed on November 8, 2019, and for designated countries that are permitted to be incorporated by reference to the literature, the contents described in the application are as follows. Incorporated into this application by reference.

In recent years, feeders have been used in a wide range of fields, including the manufacturing field. The drive mechanism of the feed device includes a belt conveyor drive, a ball screw drive, or a rack and pinion drive.

Belt conveyor drive is a mechanism that rotates a wide ring-shaped belt and puts a transported object on it to move it. It is suitable for long-distance transportation at a low price. However, the positioning accuracy of the transported object is not good, and the transport speed is slow.

The ball screw drive converts the rotational force into a linear movement. The transfer accuracy is good due to the use of a ball screw. Regarding the transport speed of the transported object, it is possible to transport the material at medium and high speeds. However, using a polishing ball screw for precision polishing makes the device expensive. Further, the transport distance is within 1 to 5 meters, and long-distance ones are difficult from the viewpoint of manufacturing.

The rack and pinion drive is a circular gear called a pinion that rolls on a rack with gears cut into flat rods. The rack and pinion drive can handle relatively long distance transportation. However, since the cable of the drive motor on the pinion side must be towed, a cable bear is required. When driving at higher speeds, loud noise is generated from the engagement between the pinion gear and the rack gear.

Patent No. 4989061

As mentioned above, there are feeding devices with various drive mechanisms, but they did not satisfy long-distance transport, high-speed transport, quietness, and high accuracy at the same time.

Here, the feeding device according to Japanese Patent No. 4989061 will be described with reference to FIG. In the feed device 108, a motor support plate 12 that supports the motor 21, an intermediate plate 13 that holds the bearing 24 that supports the rotating shaft 32, and a main plate 14 that holds the other bearing 25 are assembled on the base plate 11. ing.

Here, the rotating shaft 32 adopts a spline shaft in order to transmit torque by the rotation of the motor 21.

The flange 33 is integrated with the spline nut 34 and is fixed to the disk 35 by bolts 36. In the spline nut 34, it is preferable that a large number of balls (not shown) that move in the axial direction while rolling on a groove having a semicircular cross section formed in the axial direction of the rotating shaft 32 are arranged. .. A structure that realizes rotation and axial movement by such balls and splines is called a ball spline, and the rotating shaft 32 is preferably a ball spline shaft that easily transmits the rotational torque of the motor 21.

A cylindrical male screw member 41 is press-fitted or screwed to the outer circumference of the spline nut 34. As a result, the male screw member 41 can rotate in the same body as the spline nut 34 and can move on the rotation shaft 32.

A cylindrical female screw member 42 is provided on the outer circumference of the male screw member 41. A female screw is provided on the inner peripheral surface of the female screw member 42, and the female screw of the female screw member 42 and the male screw of the male screw member 41 are in mesh with each other in the mounted state. The female screw member 42 is fixed to the main plate 14 by bolts 37.

Further, a cylindrical rotary rotor 43 is fixed to the outer peripheral portion of the disk 35 by bolts 38. A predetermined gap exists between the inner peripheral surface of the rotating rotor 43 and the outer peripheral surface of the female screw member 42 so that the rotary rotor 43 can rotate relatively. A wire 51 is spirally wound around the outer peripheral surface of the rotating rotor 43.

With the above configuration, when the motor 21 rotates, the rotation of the output shaft 22 of the motor 21 is transmitted to the input unit 31 of the rotating shaft 32 via the coupling 23, and further, the rotating shaft 32, the flange 33, the spline nut 34, The disk 35, the male screw member 41, and the rotary rotor 43 are transmitted in this order, and they (hereinafter, for convenience, referred to as "integral rotating portion") rotate together.

When the integrated rotating portion makes one rotation, it translates in the axial direction of the rotating shaft 32 by one pitch of the engagement between the male screw of the male screw member 41 and the female screw of the female screw member 42.

Here, assuming that the meshing pitch of the male screw and the female screw is P1 and the winding pitch of the wire 51 around the rotating rotor 43 is P2, and P1 = P2, then if P1 = P2, then the winding portion of the wire 51 accompanying one rotation of the rotating rotor 43 The change in length and the amount of movement of the rotating rotor 43 in the axial direction become the same, and the wire 51 is wound into an aligned winding.

Both ends of one wire 51 are wound around the outer peripheral surfaces of the rotating rotor 43 in opposite directions and fixed with clamps. As a result, one end side of the wire 51 can be wound and the other end side can be unwound at the same time by rotating the rotary rotor 43 in one direction.

The wire 51 wound around the rotary rotor 43 as described above is sent out from the rotary rotor 43, and returns to the rotary rotor 43 again via a pulley (folding position of the wire 51) arranged away from the feeding device 108. When a moving body (not shown) is connected to the wire 51 between the pulley and the rotating rotor 43, one end side of the wire 51 is wound around the moving body by the rotation of the motor 21, and the other end side is wound. Regardless of which direction the motor 21 is ejected and rotated, the moving body can smoothly move in the direction toward or away from the feeding device.

With this configuration, the wire drive is quiet because it does not use gears, and is suitable for high-speed operation. Further, since the storage amount of the wire 51 increases due to the increase in the outer diameter of the rotary rotor 43 or the increase in the length between both ends, it is also suitable for long-distance transport. Further, if the machining accuracy of the outer circumference of the rotary rotor 43 is improved, the accuracy can be easily improved.

As described above, "Patent No. 498961" of Patent Document 1 has excellent characteristics in operation, but also has the following problems.

That is, as shown in the cross-sectional view GG of FIG. 8, the spline shaft 32, the spline nut 34, the male screw member 41, the female screw member 42, and the rotary rotor 43 are all concentrically combined. One male screw member 41 constituting the meshing of the male screw and the female screw is integrated with the spline nut 34 which is a moving member in the axial direction, and the other female screw member 42 is assembled to the fixed main plate 14. ing. Therefore, in order to satisfy the function as a feed device, the processing accuracy of each member is high, and the assembly accuracy of the base plate 11, the motor support plate 12, the intermediate plate 13, and the main plate 14 is high, and the male screw member 41 It is an important factor that the female screw member 42 is accurately centered.

(1) Therefore, it is necessary that all the members are processed with high precision and assembled with high precision.

(2) Further, in the case of the conventional technique, there is a problem that high cost is unavoidable because the number of parts is large and each member must be processed with high accuracy.

(3) Further, in the case of the conventional technique, since the number of parts is large and the assembly work for assembling the members is also required to have high accuracy, there is a problem that the cost increase is unavoidable in terms of the assembly work.

Therefore, the present invention is a feeding device capable of smoothly winding and unwinding a wire in order to solve at least one of the above-mentioned conventional problems, and is a long-distance transport, high-speed transport, quiet and high-precision feed device. It is an object of the present invention to provide a feeding device which has a simple structure and does not require high assembly accuracy.

The feeding device according to one aspect of the present invention is, for example,
With the motor
The rotating shaft of the spline shaft connected to the output shaft of the motor,
A spline nut incorporated so as to rotate integrally with the rotation axis and move in parallel relative to the rotation axis.
A rotating rotor that is directly or indirectly attached to the spline nut so as to rotate integrally with the spline nut, has a winding portion around which a wire is wound, and has a female screw on the inner peripheral surface.
A bearing structure that rotatably supports the motor, the rotating shaft, the spline nut, and the rotating rotor.
A lead screw member having a lead screw that meshes with the female screw of the rotary rotor,
Have,
The lead screw member is supported by the bearing structure so that the lead screw meshes with the female screw of the rotating rotor.
When the rotary rotor makes one rotation, the rotary rotor is configured to translate along the rotation axis by one winding pitch of the wire.

A plurality of the feed screw members may be provided.

The feed screw member may have an assembly portion having a structure to be attached to the bearing structure and a feed portion having the feed screw.

The feed screw member has the shape of a round bar as a whole, the assembly portion has a screw screwed to the support structure on the outer peripheral surface, and the feed portion has the feed screw on the outer peripheral surface. You may be.

The feed screw member may have a pedestal portion to which the assembly portion is attached to the bearing structure, and a rod-shaped portion in which the feed portion has the feed screw on at least a part of the outer peripheral surface.

The feeding device according to another aspect of the present invention is, for example,
With the motor
The rotating shaft of the spline shaft connected to the output shaft of the motor,
A spline nut incorporated so as to rotate integrally with the rotation axis and move in parallel relative to the rotation axis.
A rotating rotor that is directly or indirectly attached to the spline nut so as to rotate integrally with the spline nut and has a winding portion around which a wire is wound around the outer peripheral surface.
A male screw member having a male screw on the outer peripheral surface fixed to the spline nut,
A bearing structure that rotatably supports the motor, the rotating shaft, the spline nut, the rotating rotor, and the male screw member.
A lead screw member having a lead screw that meshes with the male screw of the male screw member,
Have,
The lead screw member is supported by the bearing structure so that the lead screw partially abuts and meshes with one circumference of the male screw of the male screw member.
When the rotary rotor makes one rotation, the rotary rotor is configured to translate along the rotation axis by one winding pitch of the wire.

A plurality of the feed screw members may be provided.

According to the present invention, it is a feeding device that smoothly winds and unwinds a wire and satisfies long-distance transfer, high-speed transfer, quietness and high accuracy, has a simple structure, and has high processing accuracy and assembly. It is possible to provide an inexpensive feeding device that does not require accuracy.

It is a longitudinal sectional view (a) in the axial direction and the longitudinal sectional view (b) in the transverse direction seen in the direction of arrows AA of the axial longitudinal sectional view (a) of the feeding device according to the embodiment of the present invention. It is a longitudinal sectional view (a) in the axial direction and the longitudinal sectional view (b) in the transverse direction seen in the direction of arrows BB of the axial longitudinal sectional view (a) according to the modified example of the embodiment of FIG. .. It is a longitudinal sectional view (a) in the axial direction and the longitudinal sectional view (b) in the transverse direction seen in the direction of arrows CC of the axial longitudinal sectional view (a) of the feeding device according to the embodiment of the present invention. It is a longitudinal sectional view (a) in the axial direction and the longitudinal sectional view (b) in the transverse direction seen in the arrow DD direction of the axial longitudinal sectional view (a) according to the modified example of the embodiment of FIG. .. It is a longitudinal sectional view (a) in the axial direction and the longitudinal sectional view (b) in the transverse direction seen in the direction of arrows EE of the axial longitudinal sectional view (a) of the feeding device according to the embodiment of the present invention. 5 is a vertical cross-sectional view (a) of the feeding device according to a modification of the embodiment of FIG. 5, and a vertical cross-sectional view (b) of the cross-sectional direction seen in the arrow FF direction of the axial vertical cross-sectional view (a). .. It is a perspective view (a), (b) of the feed screw member of embodiment of this invention. It is a longitudinal sectional view (a) in the axial direction and the longitudinal sectional view (b) in the transverse direction seen in the arrow GG direction of the axial longitudinal sectional view (a) of the conventional feeding device.

The embodiment will be described below.

FIG. 1 shows a longitudinal sectional view (a) of the feeder 101 according to the embodiment and a longitudinal sectional view (b) of the axial longitudinal sectional view (a) as seen in the direction of arrows AA. There is.

In the feed device 101, a motor support plate 112 that supports the motor 121, an intermediate plate 113 that holds the bearing 124 that supports the rotating shaft 132, and a main plate 114 that holds the other bearing 125 are assembled on the base plate 111. ing.

The rotating shaft 132 is a spline shaft that transmits the rotating torque of the motor 121.

The integrally formed flange 133 and spline nut 134 are fixed to the disk 135 by bolts 136.

The spline nut 134 has a rolling ball (not shown) inside, and has a rotating shaft 132 and a ball spline structure. Therefore, the rotational torque of the motor 121 can be easily transmitted, and the spline nut 134 can easily move along the rotating shaft 132.

A cylindrical rotary rotor 143 is fixed to the outer peripheral portion of the disk 135 by bolts 138. A female screw 144 is provided on the inner peripheral surface of the rotary rotor 143. A wire guide or groove is provided on the outer peripheral surface of the rotary rotor 143, around which the wire 151 is wound. That is, the outer peripheral surface of the rotary rotor 143 is a winding portion around which the wire is wound. As described above, both ends of one wire 151 are wound in opposite directions and fixed by clamps.

According to the above structure, when the motor 121 rotates, the output shaft 122 of the motor 121, the coupling 123, the input portion 131 of the rotating shaft 132, the rotating shaft 132, the flange 133 and the spline nut 134, the disk 135, and the rotating rotor 143 are in this order. Rotational torque is transmitted, and the above-mentioned members rotate together.

As shown in FIG. 1A, a feed screw member 200 is erected on the main plate 114, and the tip portion thereof is inserted inside the rotary rotor 143. As shown in the perspective view of FIG. 7A, the feed screw member 200 has an assembly portion 203 for assembling to the main plate 114 and a feed portion 204 having a feed screw 201.

In the present embodiment, the feed screw member 200 has the shape of a round bar as a whole, the assembly portion 203 has the screw 205 on the outer peripheral surface, and the feed portion 204 has the feed screw 201 on the outer peripheral surface. .. The assembly portion 203 is inserted into the through hole of the main plate 114 and fixed by the nut 202.

On the other hand, the feed screw 201 of the feed portion 204 of the feed screw member 200 is a male screw that partially abuts and meshes with one circumference of the female screw 144 on the inner peripheral surface of the rotary rotor 143. When the rotary rotor 143 makes one rotation, the rotary rotor 143 moves in the axial direction of the rotary shaft 132 by one pitch of the engagement between the feed screw 201 and the female screw 144.

Assuming that the pitch of the lead screw 201 is P3 and the pitch of the female screw 144 of the rotary rotor 143 is P4, if P3 = P4, the lead screw 201 and the female screw 144 can smoothly mesh with each other. Further, assuming that the winding pitch of the wire 151 is P2, if P2 = P3 = P4, the rotating rotor 143 moves accurately in the axial direction by the winding pitch P2 of the wire 151 in one rotation of the rotating rotor 143. By doing so, when the rotary rotor 143 makes one rotation, the rotary rotor 143 moves in the axial direction by the wire winding pitch P2, and the wire 151 can be wound and unwound by one winding. As a result, the wire 151 is smoothly wound and unwound, and a highly accurate and quiet feeding operation is possible.

Further, as the diameter of the rotary rotor 143 increases or the length in the axial direction increases, the storage capacity of the wire 151 increases, so that long-distance transport becomes possible. Further, if the output of the motor 121 is increased to increase the rotation speed, the rotary rotor 143 also rotates at high speed, so that high-speed transfer becomes possible.

The base plate 111, the motor support plate 112, the intermediate plate 113, and the main plate 114 have an exemplary structure, and rotate the motor 121, the rotating shaft 132, the flange 133, the spline nut 134, the disk 135, and the rotating rotor 143. If it can be supported, it can be any bearing structure that can be supported by known techniques.

Further, in the above embodiment, the rotary rotor 143 is fixed to the disk 135, but the rotary rotor 143 may be directly or indirectly fixed to the spline nut 134.

According to the present embodiment, the male screw member 41 and the female screw member 42 of the prior art of FIG. 8 may be replaced with the feed screw member 200, and the male screw member 41 of the prior art may be omitted.

Since the female screw member 42 and the male screw member 41 of the prior art of FIG. 8 mesh with each other all around, high-precision machining is required. However, the simplified feed screw member 200 of the present embodiment is cast or lost. Since only molded products such as wax can be used, the cost of parts can be significantly reduced and assembly is easy. In addition, the assembly man-hours can be reduced.

In the attachment of the feed screw member 200 according to the present embodiment, the assembling portion 203 is temporarily assembled to the main plate 114 with the nut 202, and the rotary rotor 143 is manually rotated to fully tighten the nut 202 at a position where the meshing is smooth. Just do it.
Further, the wire 151 may be composed of one wire or two wires. In the case of two wires, for example, one wire is fixed to one end of the rotary rotor 143, the other wire is fixed to the other end of the rotary rotor 143, and the wires are wound in opposite directions. To do. Then, the end of each wire is fixed to the moving body.

FIG. 2 shows a longitudinal sectional view (a) of the feeder 102 according to a modification of the feeder 101 of FIG. 1 and a longitudinal sectional view in the transverse direction as seen in the arrow BB direction of the axial longitudinal sectional view (a). Figure (b) is shown.

The feed device 102 has the same structure as that of FIG. 1 except that the feed screw members 200 are provided on the upper and lower sides. The same parts as those in FIG. 1 are designated by the same reference numerals, and redundant description will be omitted.

According to this modification, when the load on the wire 151 is heavy or when the rotation is fast, the backup effect on the rotating rotor 143 and the effect of reducing the surface pressure of the screw portion are expected.

The number, singular, and plural of the feed screw member 200 may be appropriately determined according to the intended use.

FIG. 3 shows a longitudinal sectional view (a) of the feeding device 103 according to another embodiment and a longitudinal sectional view (b) of the axial longitudinal sectional view (a) as seen in the direction of arrows CC. Shown.

This embodiment is common to the feed device 101 of FIG. 1 except that the feed screw member 300 is different from the feed screw member 200 of FIG.

As shown in the perspective view of FIG. 7B, the feed screw member 300 has an assembly portion 301 as a pedestal portion and a feed portion 302 as a rod-shaped portion. The pedestal portion of the assembly portion 301 has a fixing portion 303 and a mounting hole 304. The feed screw member 300 is fixed by inserting a part of the feed portion 302 and the assembly portion 301 into the through hole of the main plate 114, inserting a screw into the mounting hole 304, and fastening the fixing portion 303 to the main plate 114. can do. The feed portion 302 is made of a rod-shaped or plate-shaped member, and has a feed screw 305 on at least a part of the outer peripheral surface. However, the feed screw 305 is provided at a portion that meshes with the female screw 144 of the rotary rotor 143.

The lead screw member 300 is composed of an assembly portion 301 and a feed portion 302, and the assembly portion 301 may be fixed by inserting a screw into the mounting hole 304, so that the feed screw member 300 is attached to the main plate 114 as compared with the feed screw member 200. Is easy to install. Further, in manufacturing, the lead screw member 300 becomes easier to use a molded product such as casting or lost wax, and further cost reduction can be achieved.

Here, returning to FIG. 3 and continuing the explanation, in the present embodiment, except for the lead screw member 300, it is common with FIG. The lead screw member 300 has the same pitch as the female screw 144 of the rotary rotor 143, and smooth meshing is performed as in FIG. 1.

FIG. 4 shows a longitudinal sectional view (a) of the feeder 104 according to a modification of the feeder 103 of FIG. 3 and a longitudinal sectional view in the transverse direction as seen in the arrow DD direction of the axial longitudinal sectional view (a). Figure (b) is shown.

Since the feed device 104 has the same structure as that of FIG. 3 except that the feed screw members 300 are provided on the upper and lower sides, the same parts as those in FIG. 3 are designated by the same reference numerals, and redundant description will be omitted. ..

FIG. 5 shows a longitudinal sectional view (a) of the feeding device 105 according to the embodiment and a longitudinal sectional view (b) of the axial longitudinal sectional view (a) as seen in the direction of arrows EE. There is.

The feed device 105 has the same structure as the feed device 108 of FIG. 8 except that the female screw member 42 of FIG. 8 is a feed screw member 300. That is, the lead screw member 300 is attached so that the lead screw 305 partially abuts and meshes with one circumference of the male screw on the outer peripheral surface of the male screw member 41 in the rotary rotor 43.

By adopting the feed screw member 300, the component cost can be reduced as compared with the female screw member 42 of FIG. 8, and the assembly man-hours can be reduced because there is no difficult centering.

Further, as can be seen by comparing FIG. 5 and FIG. 3, the effective diameter D1 of the meshing portion between the female screw and the feed screw of the feed device 103 of FIG. 3 and the meshing portion of the male screw and the feed screw of the feed device 105 of FIG. 5 Since the feed screw 305 in FIG. 5 is on the inside, the effective diameter D2 of is clearly in the relationship of D1> D2. Therefore, when it is desired to reduce the peripheral speed of the screw meshing portion in high-speed operation, or when higher-speed operation is required, the structure of FIG. 5 can be preferably adopted.

As the material of the lead screws 201 and 305, a material having high strength and high wear resistance is suitable. On the contrary, it is preferable that the female screw 144 on the inner circumference of the rotary rotor 143 in FIG. 3 and the male screw member 41 in FIG. 5 which are the counterparts are mainly wear-resistant.

FIG. 6 is a longitudinal sectional view (a) of the feeding device 106 according to a modified example of the embodiment of FIG. 5 and a longitudinal sectional view in the transverse direction seen in the arrow FF direction of the axial longitudinal sectional view (a). (B) is shown.

The feed device 106 has the same structure as that of FIG. 5, except that the feed screw members 300 are provided on the upper and lower sides. The same parts as those in FIG. 5 are designated by the same reference numerals, and redundant description will be omitted.

According to this modification, when the load on the wire 151 is heavy or when the rotation is fast, the backup effect on the rotating rotor 43 and the effect of reducing the surface pressure of the screw portion are expected.

It is the same as in FIGS. 2 and 4 that the number, the number, and the plurality of feed screw members 300 may be appropriately determined according to the application of the feed device 106.

As described above, the feeders 101-106 according to the above embodiments can reduce the parts cost and the assembly man-hours while inheriting all the advantages of the conventional feeder 108, and thus can be used in the industrial world. It will be possible to further disseminate to.

Based on the above description, those skilled in the art may be able to conceive of additional effects and various modifications of the present invention, but the embodiments of the present invention are not limited to the above-described embodiments. Various additions, changes and partial deletions are possible without departing from the conceptual idea and purpose of the present invention derived from the contents defined in the claims and their equivalents.

11, 111: Base plate 12, 112: Motor support plate 13, 113: Intermediate plate 14, 114: Main plate 21, 121: Motor 22, 122: Output shaft 23, 123:

Coupling

24, 25, 124, 125: Bearing 31, 131: Input unit 32, 132: Rotating shaft 33, 133: Flange 34, 134: Spline nut 35, 135:

Disc

36, 37, 38, 136, 138: Bolt 41: Male screw member 42: Female screw member 43, 143: Rotating rotor 51, 151:

Wire

101, 102, 103, 104, 105, 106, 108: Feeding device 144: Female screw 200, 300: Feed screw member 201, 305: Feed screw 202: Nut 203, 301 : Assembling part 204, 302: Feeding part 205: Screw 303: Fixing part 304: Mounting hole

Claims

With the motor
The rotating shaft of the spline shaft connected to the output shaft of the motor,
A spline nut incorporated so as to rotate integrally with the rotation axis and move in parallel relative to the rotation axis.
A rotating rotor that is directly or indirectly attached to the spline nut so as to rotate integrally with the spline nut, has a winding portion around which a wire is wound, and has a female screw on the inner peripheral surface.
A bearing structure that rotatably supports the motor, the rotating shaft, the spline nut, and the rotating rotor.
A lead screw member having a lead screw that meshes with the female screw of the rotary rotor,
Have,
The feed screw member is supported by the bearing structure so that the feed screw partially abuts and meshes with one circumference of the female screw of the rotating rotor.
A feeding device configured such that when the rotary rotor makes one revolution, the rotary rotor moves in parallel along the rotary axis by the pitch of one winding of a wire.
The feeding device according to claim 1.
A feed device provided with a plurality of feed screw members.
The feeding device according to claim 1 or 2.
The feed screw member is a feed device having an assembly portion having a structure to be attached to the support structure and a feed portion having the feed screw.
The feed device according to claim 3, wherein the feed screw member has a round bar shape as a whole, and the assembly portion has a screw screwed to the support structure on an outer peripheral surface thereof. The unit is a feed device having the feed screw on the outer peripheral surface.
The feeding device according to claim 3.
The feed screw member is a feed device in which the assembly portion has a pedestal portion to which the support structure is attached, and the feed portion has a rod-shaped portion having the feed screw on at least a part of an outer peripheral surface thereof.
With the motor
The rotating shaft of the spline shaft connected to the output shaft of the motor,
A spline nut incorporated so as to rotate integrally with the rotation axis and move in parallel relative to the rotation axis.
A rotating rotor that is directly or indirectly attached to the spline nut so as to rotate integrally with the spline nut and has a winding portion around which a wire is wound around the outer peripheral surface.
A male screw member having a male screw on the outer peripheral surface fixed to the spline nut,
A bearing structure that rotatably supports the motor, the rotating shaft, the spline nut, the rotating rotor, and the male screw member.
A lead screw member having a lead screw that meshes with the male screw of the male screw member,
Have,
The lead screw member is supported by the bearing structure so that the lead screw partially abuts and meshes with one circumference of the male screw of the male screw member.
A feeder configured such that when the rotary rotor makes one revolution, the rotary rotor moves in parallel along the rotary axis by the pitch of one winding of a wire.
The feeding device according to claim 5.
A feed device provided with a plurality of feed screw members.