Linear Head Module

Abstract

To provide a linear head module which can be easily assembled and has a small number of components.SOLUTION: A linear head module 1 includes: multiple linear units 10; and a housing 11. The linear unit 10 has a movable element 60 and a stator 50. The stator 50 has a first bearing holder 20 and a second bearing holder 30. The housing 11 has: a body part 70 integrally including an output side surface part 71, a non-output side surface part 72, and a connection part 73 which connects the output side surface part 71 with the non-output side surface part 72; a flange 80 facing the output side surface part 71; and a bracket 90 facing the non-output side surface part 72.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a linear head module. [Background technology]

[0002] A linear head module disclosed in Patent Document 1 is known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent No. 4385406 Summary of the Invention [Problem to be solved by the invention]

[0004] In the linear head module described in Patent Document 1, pipes of multiple linear motors are sandwiched and integrated. In the linear head module of Patent Document 1, the output side part and the opposite side part of the lower part of the frame are integrated, so that the output side end and the opposite side end of the pipes are easily positioned, and the linear head module is easy to assemble. However, the inventors realized that there is room to further reduce the number of parts in this linear head module while maintaining this ease of assembly.

[0005] The present invention provides a linear head module that is easy to assemble and has a small number of parts. [Means for solving the problem]

[0006] A linear head module according to one aspect of the present invention includes: A plurality of linear units each having an output member that moves in a thrust direction; a housing for holding a plurality of the linear units; The linear unit includes: a mover having the output member and a magnet extending in the thrust direction; a stator having a back yoke extending along the output member and a coil, The stator includes: an output side bearing holder including a bearing provided at an output side end of the back yoke and supporting the output member movably in a thrust direction; a counter-output side bearing holder including a bearing provided at a counter-output side end of the back yoke and supporting the output member movably in a thrust direction, The housing includes: a main body portion integrally including an output side portion having a plurality of first through holes through which the output side bearing holders are respectively inserted, a counter-output side portion having a plurality of second through holes through which the counter-output side bearing holders are respectively inserted, and a connecting portion connecting the output side portion and the counter-output side portion; a flange facing the output side portion and supporting an output side end of each of the output side bearing holders; A bracket facing the opposite output side portion supports an opposite output side end of each of the opposite output side bearing holders.

[0007] According to the present invention, a linear head module that is easy to assemble and has a small number of parts is provided. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a linear head module according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a cross-sectional view of a linear head module. [Diagram 3] FIG. 4 is an enlarged view of the output side end of the linear unit. [Figure 4] FIG. 4 is an enlarged view of the end portion of the linear unit opposite to the output side. [Diagram 5] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. For the sake of convenience, the description of the components having the same reference numbers as those already described in the description of the embodiment will be omitted. Also, for the sake of convenience, the dimensions of each component shown in the drawings may differ from the actual dimensions of each component.

[0010] Fig. 1 is a perspective view of a linear head module 1 according to an embodiment of the present invention. In Fig. 1, the letter F indicates the front, the letter B indicates the rear, the letter U indicates the top, the letter D indicates the bottom, the letter R indicates the right, and the letter L indicates the left. In the following explanation, for convenience of explanation, the "left-right direction", "front-rear direction", and "up-down direction" will be mentioned as appropriate. Here, the "up-down direction" is a direction that includes the "upward direction" and the "downward direction". The "front-rear direction" is a direction that includes the "forward direction" and the "rearward direction". The "left-right direction" is a direction that includes the "leftward direction" and the "rightward direction". In the following explanation, the thrust direction of the linear head module 1 will be referred to as the front-rear direction.

[0011] As shown in Fig. 1, the linear head module 1 has a plurality of linear units 10 having an output member 61 that moves in the front-rear direction (thrust direction), and a housing 11 that holds the plurality of linear units 10. The output member 61 is movable in the front-rear direction. In the illustrated example, the linear head module 1 has eight linear units 10. Four linear units 10 are arranged in the left-right direction on the upper stage, and four linear units 10 are arranged in the left-right direction on the lower stage.

[0012] Fig. 2 is a cross-sectional view of the linear head module 1. Fig. 2 is a view of the linear head module 1 in a cross section extending in the front-rear and up-down directions. As shown in Fig. 2, each linear unit 10 has a stator 50 fixed to a housing 11 and a mover 60 that is movable in the front-rear direction relative to the stator 50.

[0013] The mover 60 has an output member 61 extending in the front-rear direction, and a magnet 62. The multiple magnets 62 are arranged in a row in the front-rear direction and connected to each other. The output member 61 is a rod-shaped member extending in the front-rear direction. The output member 61 has a front output rod 61a provided in front of the magnet 62, and a rear output rod 61b provided behind the magnet 62. A front portion of the front output rod 61a is connected to an object to be driven by the linear head module 1.

[0014] The stator 50 has a back yoke 51 and a coil 52. In the illustrated example, the stator 50 further has a board 53 that supplies power to the coil 52 to control the coil 52, and a cover 54 that houses the board 53. The stator 50 is fixed to the housing 11.

[0015] The back yoke 51 is a member made of a magnetic material such as iron. In the illustrated example, the back yoke 51 is a cylindrical member extending along the output member 61. The output member 61 is accommodated inside the cylindrical back yoke 51 so as to be movable in the front-rear direction. In addition, a plurality of coils 52 are provided inside the cylindrical back yoke 51. The coils 52 are configured by winding electric wires in a cylindrical shape centered on an axis extending in the front-rear direction. The back yoke 51 converges the magnetic flux lines generated from the coils 52 to increase the magnetic force.

[0016] As shown in FIG. 2 (and FIG. 4), the mover 60 has a cylindrical magnet holder 63. A plurality of magnets 62 are provided inside the magnet holder 63. The magnet holder 63 is provided on the inner periphery of the cylindrical back yoke 51 so as to be movable in the front-rear direction relative to the back yoke 51. A magnet holder 63 is provided at the front and rear ends of the magnet holder 63 with a magnet hold-down member 64. That is, the magnet hold-down member 64 is located at the front and rear ends of the plurality of magnets 62 arranged in the front-rear direction. The magnet holder 64 is provided with a press-fit hole. The rear end of the front output rod 61a is press-fitted into the press-fit hole of the magnet holder 63 provided at the front end. The front end of the rear output rod 61b is press-fitted into the press-fit hole of the magnet holder 63 provided at the rear end of the magnet holder 63.

[0017] An electric wire extending from a power source (not shown) is connected to the substrate 53. The substrate 53 is housed in a plate-shaped cover 54 that is provided on the outer periphery of the cylindrical back yoke 51 and that houses the substrate 53. An electric wire extends from the substrate 53 to the coil 52 and supplies power to the coil 52. The direction and strength of the magnetic lines of force generated in the coil 52 are controlled by controlling the direction and amount of the current that the substrate 53 supplies to the coil 52. This controls the direction and speed of movement of the output member 61.

[0018] Fig. 3 is an enlarged view of the output side end of the linear unit 10 in Fig. 2. As shown in Fig. 3, the stator 50 has a first bearing holder 20 (output side bearing holder). The first bearing holder 20 is attached to the housing 11 and supports the output side end of the back yoke 51 of the stator 50. The first bearing holder 20 is provided at the output side end of the back yoke 51. The first bearing holder 20 has a first bearing 21 that supports the output member 61 movably in the front-rear direction.

[0019] Fig. 4 is an enlarged view of the counter-output side end of the linear unit 10 in Fig. 2. As shown in Fig. 4, the stator 50 has a second bearing holder 30 (counter-output side bearing holder). The second bearing holder 30 is attached to the housing 11 and supports the counter-output side end of the back yoke 51 of the stator 50. The second bearing holder 30 is provided at the counter-output side end of the back yoke 51. The second bearing holder 30 has a second bearing 31 that supports the output member 61 movably in the front-rear direction.

[0020] 5 is an exploded perspective view of the housing 11. As shown in FIG. 5, the housing 11 that holds the linear units 10 has a main body 70, a flange 80, and a bracket 90.

[0021] The main body 70 is a frame-shaped member integrally including an output side surface portion 71, a counter-output side surface portion 72, and a connecting portion 73.

[0022] The output side surface portion 71 is a portion that constitutes the output side surface of the main body portion 70. A plurality of first through holes 71a are provided in the output side surface portion 71. The anti-output side surface portion 72 is a portion that constitutes the anti-output side surface of the main body portion 70. A plurality of second through holes 72a are provided in the anti-output side surface portion 72. The output side surface portion 71 and the anti-output side surface portion 72 extend in the up-down direction and the left-right direction.

[0023] The connecting portion 73 is a portion that connects the output side portion 71 and the anti-output side portion 72. The connecting portion 73 is made up of a pair of side portions that extend in the front-rear direction and the up-down direction. Returning to FIG. 2, the linear unit 10 penetrates the main body 70 in the front-rear direction. The first bearing holder 20 of the linear unit 10 protrudes forward from the main body 70. The front end of the linear unit 10 penetrates a first through hole 71a in the output side portion 71. The first bearing holder 20 is inserted into the first through hole 71a.

[0024] The second bearing holder 30 of the linear unit 10 protrudes rearward from the main body portion 70. The rear end of the linear unit 10 passes through a second through hole 72a in the anti-output side surface portion 72. The second bearing holder 30 is inserted into the second through hole 72a.

[0025] The flange 80 is a plate-like member disposed to face the output side portion 71. The flange 80 supports the output side end portion of each of the first bearing holders 20. The flange 80 holds the stator 50 so that the stator 50 does not slip out from inside the main body portion 70 to the output side.

[0026] The bracket 90 faces the anti-output side portion 72 and supports the anti-output side end of each second bearing holder 30. The bracket 90 holds the stator 50 so that the stator 50 does not slip out from inside the main body portion 70 to the anti-output side.

[0027] An intermediate portion of the linear unit 10 is supported by a main body portion 70 of the housing 11. A flange 80 prevents the linear unit 10 from slipping out in the forward direction from the main body portion 70. A bracket 90 prevents the linear unit 10 from slipping out in the rear direction from the main body portion 70.

[0028] According to the linear head module 1 of this embodiment, the housing 11 holds the multiple linear units 10 together, so that assembly is easier than a configuration in which the multiple linear units 10 are individually assembled to the linear head module 1 . Furthermore, the main body 70 of the housing 11 is configured by integrating three parts, the output side surface 71, the anti-output side surface 72, and the connecting portion 73, so the housing 11 can be configured with three parts, the main body 70, the flange 80, and the bracket 90. Therefore, the linear head module 1 can be configured with a small number of parts.

[0029] In addition, in the linear head module 1 of this embodiment, as shown in Figure 3, the flange 80 is provided with a first insertion hole 81 through which the output member 61 is inserted, and an abutment portion 82 against which the output side end face of the first bearing holder 20 abuts. By abutting the output side end face of the first bearing holder 20 against the abutting portion 82, the position of the linear unit 10 in the front-rear direction can be determined easily and accurately.

[0030] 3, in the linear head module 1 of this embodiment, the first bearing holder 20 has a first large diameter portion 22 provided on the front side, and a first small diameter portion 23 provided on the rear side and having a smaller diameter than the first large diameter portion 22. The first large diameter portion 22 is fitted into a first through hole 71a of the output side portion 71 of the housing 11. The first small diameter portion 23 is fitted into the front end portion of the back yoke 51. By connecting the first small diameter portion 23 to the back yoke 51 and fitting the first large diameter portion 22 into the first through hole 71a of the output side portion 71, the position of the linear unit 10 in the in-plane direction perpendicular to the front-to-rear direction can be easily and accurately determined.

[0031] 4, the second bearing holder 30 includes a back yoke coupling portion 32 provided on the front side, a second small diameter portion 33 provided on the rear side, and a second large diameter portion 34 provided between the back yoke coupling portion 32 and the second small diameter portion 33. The second large diameter portion 34 has a larger diameter than the second small diameter portion 33. The back yoke coupling portion 32 is inserted into the rear end portion of the back yoke 51.

[0032] The bracket 90 is provided with a second insertion hole 91 through which the rear output rod 61b of the mover 60 passes. A fitting portion 92 extending toward the output side is provided at the radially inner end of the wall surface forming the second insertion hole 91. The inner circumferential surface of this fitting portion 92 fits with the outer circumferential surface of the tip of the second small diameter portion 33 of the second bearing holder 30 which passes through the second through hole 72a of the anti-output side surface portion 72 and extends toward the anti-output side. By fitting the fitting portion 92 of the bracket 90 into the second small diameter portion 33 of the second bearing holder 30, the position of the linear unit 10 in the in-plane direction perpendicular to the front-rear direction can be easily and accurately determined.

[0033] As shown in FIG. 2, the stator 50 has a coil 52, a substrate 53 that supplies power to the coil 52 and controls the coil 52, a cylindrical back yoke 51 in which the coil 52 is housed, and a plate-shaped cover 54 that is provided on the outer periphery of the cylindrical back yoke 51 and houses the substrate 53. 5, the first through hole 71a of the output side surface portion 71 is circular, through which the cylindrical first bearing holder 20 is inserted. The second through hole 72a of the anti-output side surface portion 72 has a shape through which the back yoke 51 and the cover 54 are inserted. In the example shown, the second through hole 72a has a shape in which a rectangular upper portion is connected to a circular lower portion that is also circular. The linear head module 1 can be easily assembled by first inserting the non-output side end of the linear unit 10 into the second through hole 72a and then inserting the output side end of the linear unit 10 into the first through hole 71a.

[0034] Although the embodiment of the present invention has been described above, it goes without saying that the technical scope of the present invention should not be interpreted as being limited by the description of the embodiment. The embodiment is merely an example, and it is understood by those skilled in the art that various modifications of the embodiment are possible within the scope of the invention described in the claims. The technical scope of the present invention should be determined based on the scope of the invention described in the claims and its equivalents.

[0035] In the above embodiment, the magnetic material is cylindrical, but the shape of the magnetic material is not limited to this. For example, the magnetic material may be in the shape of a square tube or a plate. [Explanation of symbols]

[0036] 1 Linear Head Module 10 Linear Unit 11. Housing 20 First bearing holder (output side bearing holder) 21 First bearing 30 Second bearing holder (non-output side bearing holder) 31 Second bearing 50 stator 51 Back Yoke 52 Coil 53 Substrate 54 Cover 60 Mover 61 Output member 62 Magnet 70 Main body 71 Output side section 71a First through hole 72 Anti-output side 72a Second through hole 80 Flange 90 Bracket

Claims

1. A plurality of linear units each having an output member that moves in a thrust direction; a housing for holding a plurality of the linear units; The linear unit includes: a mover having the output member and a magnet extending in the thrust direction, and a stator having a back yoke and a coil extending along the output member, The stator includes: an output side bearing holder including a bearing provided at an output side end of the back yoke and supporting the output member movably in a thrust direction; a counter-output side bearing holder including a bearing provided at a counter-output side end of the back yoke and supporting the output member movably in a thrust direction, The housing includes: a main body portion integrally including an output side portion having a plurality of first through holes through which the output side bearing holders are respectively inserted, a counter-output side portion having a plurality of second through holes through which the counter-output side bearing holders are respectively inserted, and a connecting portion connecting the output side portion and the counter-output side portion; a flange facing the output side portion and supporting an output side end of each of the output side bearing holders; a bracket facing the opposite output side portion and supporting an opposite output side end of each of the opposite output side bearing holders, Linear head module.

2. The flange has: a first insertion hole through which the output member is inserted; 2. The linear head module according to claim 1, further comprising an abutment portion against which an end face on the output side of said output side bearing holder abuts.

3. the output side bearing holder has a first large diameter portion provided on the output side and a first small diameter portion provided on the opposite side to the output side, the first large diameter portion is inserted into a first through hole of the output side portion, The linear head module according to claim 1 , wherein the first small diameter portion is fitted to an output side end portion of the back yoke.

4. The non-output side bearing holder is A back yoke coupling portion provided on an output side and coupled to the back yoke; A second small diameter portion is provided on the opposite side to the output side and is fitted with the bracket; 2. The linear head module according to claim 1, further comprising: a second large diameter portion provided between the back yoke coupling portion and the second small diameter portion, the second large diameter portion having a larger diameter than the second small diameter portion.

5. The bracket is provided with a second insertion hole through which the output member passes, a fitting portion extending toward an output side is provided at a radially inner end portion of a wall surface forming the second insertion hole, 5. The linear head module according to claim 4, wherein the fitting portion is fitted to an end portion of the second small diameter portion extending to the opposite output side through the second through hole.

6. The stator includes: The coil; a board that supplies power to the coil and controls the coil; The back yoke is cylindrical and has the coil housed therein; a plate-shaped cover that is provided on an outer circumferential side of the cylindrical back yoke and that houses the substrate; the first through hole of the output side surface portion is circular, through which the cylindrical back yoke is inserted; The linear head module according to claim 1 , wherein the second through hole in the opposite output side surface portion has a shape through which the back yoke and the cover are inserted.

Images