Actuator device

Abstract

To provide an actuator device which has a dust-proof and waterproof effect even between members which execute a relative motion.SOLUTION: An actuator device includes a pedestal unit 10, a slider unit 20, and scrape means 30. The pedestal unit 10 includes: a pedestal 11; and a steel belt 13 which is attracted to the pedestal 11 by a magnet 12, and in which a wear resistant material layer 133 is formed on an outside surface which does not face the pedestal 11. The slider unit 20 has a slider body 21 and a passive part 22. At the slider body 21, a passing hole 211 is provided where the steel belt 13 passes. The slider body 21 comes into contact with the outside surface of the steel belt 13 at a plurality of points. The scrape means 30 is mounted on the slider unit 20 so as to come into contact with the wear resistant material layer 133. Thereby, when the slider unit 20 moves with respect to the pedestal unit 10, water and dust attached to a surface of the wear resistant material layer 133 are scraped off by a scrape member 31.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an actuator device, and more particularly to a linear actuator device. [Background technology]

[0002] Patent Document 1 describes a technique for reducing humidity inside an actuator device by providing a dehumidifier.

[0003] Patent document 2 also describes a technology that improves dustproof and waterproof performance by sandwiching a front cover sealing member between the housing body and the front cover, and a rear cover sealing member between the housing body and the rear cover.

[0004] In this way, in Patent Document 2, a sealing member for the first rod located on the outside of the housing and a sealing member for the second rod located on the inside of the housing are arranged on the front cover, and even if foreign matter such as dust or water breaks through the sealing member for the first rod and enters, it is blocked by the sealing member for the second rod, thereby preventing dust and water from entering from both ends of the housing body and improving the dustproof and waterproof performance of the actuator.

[0005] In addition, a soft wiper is disposed on the rear end side of the first rod seal member to wipe away foreign matter such as oil and powder generated inside the housing, thereby preventing leakage to the outside of the housing.

[0006] However, the above-mentioned conventional techniques do not disclose a structure that provides dust-proof and waterproof effects between members that perform relative motion. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 6025625 [Patent Document 2] Patent No. 5968732 Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, an object of the present invention is to provide an actuator device having dust-proof and waterproof effects even between members that perform relative motion. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides an actuator device including a base unit extending along a predetermined front-rear direction, a slider unit attached to the base unit so as to be movable along the front-rear direction, and scraping means and driving means disposed on the slider unit, The base unit includes a base extending along the front-rear direction, opening downward, and having a storage space extending along the front-rear direction; two magnets each extending along the front-rear direction and disposed on the base so as to be spaced apart from each other in a width direction perpendicular to the front-rear direction and positioned outside the opening of the storage space; a steel belt that is attached to the base by being attracted by the magnetic forces from the two magnets while covering the opening of the storage space, and has a wear-resistant material layer laminated on the side that does not face the storage space; The slider unit is accommodated in the accommodation space so as to be movable along the front-rear direction and to be unable to rotate relative to the base unit, and includes a slider main body that extends so as to be curved in the front-rear direction and in which a through hole through which the steel belt passes is formed, and a passive part that is formed in the slider main body so as to have a screw hole extending along the front-rear direction, and by extending so as to be curved, when the steel belt passes through the through hole, the steel belt comes into contact with an inner wall of the through hole and is bent in accordance with the curvature of the through hole, The scraping means has a scraping member disposed on the slider unit so as to contact the wear-resistant material layer laminated on the steel belt, The actuator device is characterized in that the driving means has a rotational driving unit fixed to the base unit, and a power output shaft that is rotationally driven by the rotational driving unit and screws into the passive unit, and the passive unit is driven to move along the forward / backward direction together with the slider unit by rotation of the power output shaft, which is rotationally driven by the rotational driving unit. Effect of the Invention

[0010] According to the above configuration, in the present invention, the steel belt accommodated in the accommodating space tightly shields the opening of the accommodating space by being attracted by the magnet, and when the slider unit moves relative to the base by being driven by the rotary drive unit, the scraping member of the scraping means abutting against the wear-resistant material layer laminated on the steel belt can sweep away water, dust, etc. adhering to the wear-resistant material layer, thereby providing an actuator that can prevent a situation in which water, dust, etc. adheres to the steel belt and enters the slider unit, causing a malfunction. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing an embodiment of an actuator device of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 4 is an enlarged explanatory view of a portion of FIG. [Figure 6] FIG. 5 is an enlarged explanatory view of a portion of FIG. [Figure 7] FIG. 7 is a perspective view corresponding to the portion shown in FIG. 6. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 5. [Figure 9] FIG. 2 is an exploded perspective view showing the configuration of a slider body in the embodiment. [Figure 10] FIG. 2 is a perspective view showing the configuration of an oil guide sleeve in the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The configuration of each part of the present invention will be described in detail below with reference to the drawings.

[0013] As shown in FIGS. 1 and 2, the illustrated embodiment of the actuator device of the present invention comprises a base unit 10, a slider unit 20, a scraping means 30, and a driving means 40.

[0014] Referring also to Figures 3 and 4, the base unit 10 is configured to have a base 11 extending along the front-to-rear direction X, two magnets 12 arranged on the base 11 with a space between them in the width direction Y perpendicular to the front-to-rear direction X, and a steel belt 13 attached to the base 11.

[0015] 8, the base 11 has an upper wall 111 extending along the front-rear direction X and two side walls 112 extending from both sides of the upper wall 111, so that an accommodation space 114 extending along the front-rear direction X and opening downward is enclosed between the upper wall 111 and the two side walls 112, and two end blocks 113 are formed at both ends in the front-rear direction X. In addition, an engagement groove 116 is formed so as to be recessed in a tip surface 115 extending from the upper wall 111 of the side wall 112. In addition, an oil inlet 117 is formed near the end block 113 of the side wall 112 so as to penetrate the side wall 112 and communicate with the accommodation space 114, and a cover 118 is also provided to cover the oil inlet 117 by being attached to the oil inlet 117.

[0016] The magnet 12 extends along the front-rear direction X, and is disposed outside the opening of the accommodation space 114 by being fitted into each of the engagement grooves 116 .

[0017] The steel belt 13 has both ends in the front-rear direction X fixed to two end blocks 113, respectively, and is attached to the base 11 by being attracted by the magnetic forces of the two magnets 12 while covering the opening of the accommodation space 114. The steel belt 13 has an inner surface 131 facing the accommodation space 114 and an outer surface 132 opposite the inner surface 131, and a wear-resistant material layer 133 is laminated on the outer surface 132 (see FIG. 6).

[0018] The slider unit 20 is configured to include a slider body 21 accommodated in the accommodation space 114 and attached to the base unit 10 so as to be movable along the front-rear direction X and unable to rotate relative to the base unit 10, a passive part 22 fixed to the slider body 21 and having a screw hole 221 extending along the front-rear direction X, two oil guide sleeves 23 attached to the slider body 21 so as to be positioned on both front and rear sides of the passive part 22 in the front-rear direction X, two side covers 24 attached to the sides of each oil guide sleeve 23 facing the passive part 22 in the front-rear direction X, two bead bearing means 25 (see FIG. 8) arranged on the slider body 21 so as to be positioned on both sides of the slider body 21 in the front-rear direction X, and an oil passage set 215 (see FIG. 8). Each bead bearing means 25 has a rotation path and a bead set 26 consisting of a plurality of beads.

[0019] 6, 8 and 9, the slider body 21 has a main block 27, a front guide block 28 connected to the center of the front side of the main block 27, and a rear guide block 29 connected to the main block 27 on the opposite side of the front guide block 28 in the front-rear direction X. The slider body 21 is also formed with a passage hole 211 extending along the front-rear direction X and through which the steel belt 13 passes, a first arrangement groove 212 extending along the front-rear direction X, and a second arrangement groove 213 extending along the width direction Y and communicating with the first arrangement groove 212. Furthermore, the slider body 21 has a one-way injection valve 214 formed to correspond to, specifically to face, the oil injection port 117 in the base 11 and communicating with an oil passage set 215.

[0020] 6 and 7, the passage hole 211 is surrounded by an upper wall surface 216 and a lower wall surface 217. The upper wall surface 216 is formed on the lower side of the main block 27, and has a support surface 216' that protrudes in an arc shape toward the passage hole 211. The lower wall surface 217 has a first abutment surface 217' that protrudes in an arc shape toward the accommodating space 114 in the front guide block 28, a second abutment surface 217" that protrudes in an arc shape toward the accommodating space 114 in the rear guide block 29, and a top surface 216' that is positioned between the first abutment surface 217' and the second abutment surface 217" and that is recessed toward the outside of the accommodating space 114 with respect to the first abutment surface 217' and the second abutment surface 217". The through hole 211 is constituted by a first abutment surface 217', a second abutment surface 217" and a support surface 216', and extends in the front guide block 28 and the rear guide block 29. Therefore, the through hole 211 surrounded by the upper wall surface 216 and the lower wall surface 217 extends so as to be curved in the front-rear direction X, and the outer surface 132 of the steel belt 13 passing through the through hole 211 abuts against the first abutment surface 217', the second abutment surface 217" and the support surface 216', respectively. That is, since the upper wall surface 216 has a support surface 216' protruding in an arc shape, and the lower wall surface 217 has a first abutment surface 217' and a second abutment surface 217" protruding in an arc shape toward the through hole 211, the through hole 211 is extended in a curved manner, and when the steel belt 13 passes through the through hole 211, it comes into contact with the inner wall of the through hole 211 (the support surface 216', the first abutment surface 217', and the second abutment surface 217") and is bent in accordance with the curvature of the through hole 211.

[0021] In this embodiment, two first positioning grooves 212 and two second positioning grooves 213 are formed, and each first positioning groove 212 and each second positioning groove 213 are connected to each other and arranged to form a rectangle, each first positioning groove 212 is arranged on both sides of the top recessed portion 210 along the width direction Y, and each second positioning groove 213 is formed on the first abutment surface 217' and the second abutment surface 217".

[0022] As shown in Figures 5, 8 and 10, each oil guide sleeve 23 is formed to have an inner end surface 231 facing the passive part 22, an outer end surface 232 opposite the inner end surface 231 along a predetermined axis L (see Figure 5), an outer annular surface 233 connecting between the inner end surface 231 and the outer end surface 232, an inner annular surface 235 surrounding the inner hole 234 on the opposite side of the outer annular surface 233, an oil guide groove 236 recessed in the inner end surface 231 and formed in a C-shape surrounding the axis L, an introduction hole 237 extending from the outer annular surface 233 to the oil guide groove 236, a first discharge hole 238 extending from the oil guide groove 236 to the inner annular surface 235, and two second discharge holes 239 extending from the oil guide groove 236 to the outer annular surface 233. The inlet hole 237, the oil guide groove 236 and the first drain hole 238 form a first oil passage 215', and the inlet hole 237, the oil guide groove 236 and each of the second drain holes 239 form a second oil passage 215". The oil passage set 215 includes the first oil passage 215' and a second oil passage 215". The second oil passage 215" formed by the inlet hole 237, the oil guide groove 236 and each of the second drain holes 239 supplies oil to each of the bead bearing means 25 (see the dotted arrow in Figure 10). The oil guide groove 236 may be provided in either one of the oil guide sleeves 23.

[0023] As shown in FIG. 5, each side cover 24 is formed in a C-shape and is provided with a blocking protrusion 241 that fits into the opening of the oil guide groove 236 to block it.

[0024] 6 and 7, the scraping means 30 includes scraping members 31 arranged in each of the second arrangement grooves 213 and each of the first arrangement grooves 212 (not shown in the drawings) of the slider unit 20 and abutting against the wear-resistant material layer 133, and a plurality of biasing means 32 attached between the scraping members 31 and the slider body 21. The scraping members 31 are formed in a hollow rectangular frame shape and are attached with play in each of the first arrangement grooves 212 and each of the second arrangement grooves 213. The biasing force from each biasing means 32 presses the scraping members 31 against the base 11 and the outer surface 132 of the steel belt 13.

[0025] The driving means 40 is attached to the base unit 10 and has a rotation driving part 41 and a power output shaft 42 that is driven to rotate by the rotation driving part 41 and is screwed into the passive part 22. When the power output shaft 42 is rotated by the rotation driving part 41 attached to the base unit 10, the passive part 22 moves in conjunction with the rotation of the power output shaft 42 relative to the base unit 10 in the front-rear direction X. As shown in FIG. 8, a first oil passage 215′ formed by the introduction hole 237, the oil guide groove 236, and the first discharge hole 238 supplies oil to the power output shaft 42.

[0026] The circumstances under which the present invention operates and its effects are described in detail below.

[0027] 1 and 3 to 8, in the actuator device of the present invention, the slider unit 20 is attached to the base unit 10, the passive part 22 is screwed onto the power output shaft 42 of the driving means 40, the steel belt 13 covers the opening of the accommodation space 114 and is attracted by each magnet 12, and the scraping member 31 of the scraping means 30 abuts against the wear-resistant material layer 133 by the elastic force from each biasing means 32. Therefore, when the rotation driving unit 41 starts, the passive part 22 is driven by the power output shaft 42 to move the slider unit 20 relative to the base unit 10 along the front-rear direction X.

[0028] When the slider unit 20 moves relative to the base unit 10, the steel belt 13 is attracted to the lower end of the base 11 by the magnetic force from the magnet 12, thereby blocking the lower opening of the accommodation space 114.

[0029] At this time, as the slider unit 20 moves relative to the base unit 10, the outer surface 132 of the steel belt 13 passing through the through hole 211 abuts against the first abutment surface 217', the second abutment surface 217" and the support surface 216', respectively, allowing the slider unit 20 to move smoothly relative to the base unit 10. In addition, by disposing the wear-resistant material layer 133 on the outer surface 132 of the steel belt 13, it is possible to suppress wear of the steel belt 13.

[0030] The elastic force from each of the biasing means 32 presses the scrape member 31 against the base 11 and the outer surface 132 of the steel belt 13, so that the tip of the scrape member 31 abuts against the steel belt 13. Since the scrape member 31 is in the shape of a hollow rectangular frame, the spatial communication between the storage space 114 inside the slider unit 20 and the outside is blocked, and when the slider unit 20 moves relative to the base unit 10, the scrape member 31 can sweep away water, dust, etc. that adheres to the surface of the wear-resistant material layer 133 of the steel belt 13.

[0031] In addition, when the slider unit 20 is driven to reach a predetermined position on the base unit 10 (a position away from the rotation drive unit 41 where the oil inlet 117 on the base unit 10 side and the one-way injection valve 214 on the slider unit 20 side face each other), the oil inlet 117 and the one-way injection valve 214 face each other, so that lubricating oil can be injected via the oil inlet 117 and the one-way injection valve 214, and further oil can be supplied around the power output shaft 42 via the first oil passage 215' formed by the introduction hole 237, the oil guide groove 236, and the first discharge hole 238. At the same time, oil can be supplied to each bead bearing means 25 via the second oil passage 215" formed by the inlet hole 237, the oil guide groove 236, and each second discharge hole 239. Furthermore, in this embodiment, when oil is injected, the first oil passage 215' and the second oil passage 215" are different lengths, so the oil pressure at the back of these passages (the outlet side of the injected oil) is likely to differ as well. For this reason, by using fluid analysis software such as SolidWorks (registered trademark) flow simulation to configure the inlet hole 237 so that the passage width shown in Figures 5 and 10 is widened, it is possible to optimize the oil to be injected uniformly.

[0032] Furthermore, by configuring base 11 so that storage space 114 opens downward, communication between storage space 114 and the outside space can be effectively blocked, improving dustproofing and waterproofing performance.

[0033] As described above, the present invention can achieve dustproof and waterproof performance of IP (Ingress Protection) 68 by utilizing the overall layout relationship.

[0034] In summary, the actuator device of the present invention has a simple structure and is therefore relatively easy to assemble, and can also exhibit sufficient dustproof and waterproof performance, so that the objective of providing an actuator device having dustproof and waterproof effects even between members that perform relative movement can be reliably achieved.

[0035] Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible without departing from the gist of the present invention. [Explanation of symbols]

[0036] 10 Pedestal unit 11 Pedestal 111 Upper wall 112 Side wall 113 End Block 114 Containment Space 115 Tip surface 116 Engagement groove 117 Oil filler 118 Cover 12. Magnets 13 Steel Belt 131 Inner surface 132 External surface 133 Wear-resistant material layer 20 Slider Unit 21 Slider body 211 Passing hole 212 First placement groove 213 Second arrangement groove 214 One-way injection valve 215 Oil passage set 215' First Oil Passage 215” 2nd oil passage 216 Upper wall 216' Support surface 217 Lower wall 217' First contact surface 217” Second abutment surface 22 Passive Part 221 Screw hole 23 Oil guide sleeve 231 Inner end face 232 Outer end face 233 Outer annular surface 234 Inner Hole 235 Inner Annular Surface 236 Oil guide groove 237 Introduction hole 238 First Drain Hole 239 Secondary Exhaust Hole 24 Side cover 241 Cut-off protrusion 25 Bead Bearing Means 26 Beads Set 27 Main Block 28 Front guide block 29 Rear guide block 30 Scrape means 31 Scrape member 32 Actuation means 40 Driving Means 41 Rotation drive unit 42 Power output shaft X Anteroposterior direction Y Width direction L axis

Claims

1. An actuator device comprising: a base unit extending along a predetermined front-rear direction; a slider unit attached to the base unit so as to be movable along the front-rear direction; scraping means disposed on the slider unit; and a driving means, The base unit includes a base extending along the front-rear direction, opening downward, and having a storage space extending along the front-rear direction; two magnets each extending along the front-rear direction and disposed on the base so as to be spaced apart from each other in a width direction perpendicular to the front-rear direction and positioned outside the opening of the storage space; a steel belt that is attached to the base by being attracted by the magnetic forces from the two magnets while covering the opening of the storage space, and has a wear-resistant material layer laminated on the side that does not face the storage space; The slider unit is accommodated in the accommodation space so as to be movable along the front-rear direction and to be unable to rotate relative to the base unit, and includes a slider body that extends so as to be curved in the front-rear direction and in which a through hole through which the steel belt passes is formed, and a passive part that is fixed to the slider body so as to have a screw hole extending along the front-rear direction, and by extending so as to be curved, when the steel belt passes through the through hole, the steel belt comes into contact with an inner wall of the through hole and is bent in accordance with the curvature of the through hole, The scraping means has a scraping member disposed on the slider unit so as to contact the wear-resistant material layer laminated on the steel belt, the driving means has a rotational driving unit attached to the base unit, and a power output shaft that is rotationally driven by the rotational driving unit and screws into the passive unit, and the passive unit is driven to move along the forward / backward direction together with the slider unit by rotation of the power output shaft, which is rotationally driven by the rotational driving unit.

2. The slider body of the slider unit is formed with two first arrangement grooves extending along the front-rear direction and two second arrangement grooves extending along the width direction and communicating with each of the first arrangement grooves, the scraping members of the scraping means are mounted in each of the first and second grooves; 2. The actuator device according to claim 1, wherein the scraping means further comprises a plurality of biasing means disposed between the scraping member and the slider body, each of the biasing means providing a biasing force to press the scraping member against the base and the outside of the steel belt.

3. The base unit further includes an oil inlet disposed in the base, 2. The actuator device according to claim 1, wherein the slider body of the slider unit has a one-way injection valve corresponding to the oil inlet, and the slider unit further has an oil passage set communicating with the one-way injection valve.

4. 4. The actuator device according to claim 3, wherein the slider unit comprises two oil guide sleeves attached to the slider body, and two bead bearing means disposed on the slider body and each having a bead set consisting of a plurality of beads.

5. At least one of the oil guide sleeves of the slider unit has an oil guide groove, an inner end surface facing the passive part, an outer end surface opposite the inner end surface along a predetermined axis, an outer annular surface extending between the inner end surface and the outer end surface, an inner annular surface opposite the outer annular surface and surrounding an inner bore, an inlet hole extending from the outer annular surface to the oil guide groove, a first drain hole extending from the oil guide groove to the inner annular surface, and two second drain holes extending from the oil guide groove to the outer annular surface, The oil guide groove is recessed in the inner end surface and is formed in a C-shape so as to surround the axis, the first drain hole supplies oil to the power output shaft; each of the second drain holes supplies oil to each of the bead bearing means, and the introduction hole, the oil guide groove and the first drain hole form a first oil passage; 5. The actuator device according to claim 4, wherein the inlet hole, the oil guide groove and each of the second drain holes form a second oil passage, and the oil passage set includes the first oil passage and the second oil passage.

6. a slider body of the slider unit having a main block, a front guide block connected to a front central portion of the main block, and a rear guide block connected to the main block on an opposite side in the front-rear direction to the front guide block, 3. The actuator device according to claim 2, wherein the through hole is defined by an upper wall surface corresponding to the main block and a lower wall surface extending from the front guide block to the rear guide block.

7. The lower wall surface of the slider unit is a first contact surface located on the front guide block and projecting in an arc shape toward the storage space, a second contact surface located on the rear guide block and projecting in an arc shape toward the storage space, and a top recessed portion located between the first contact surface and the second contact surface and recessed toward an outside of the storage space with respect to the first contact surface and the second contact surface, the upper wall surface has a support surface that protrudes in an arc shape toward the passage hole, 7. The actuator device according to claim 6, wherein the steel belt passing through the through hole contacts the first contact surface, the second contact surface, and the support surface, respectively.

8. the first arrangement grooves and the second arrangement grooves of the slider unit are connected to each other and are arranged to form a quadrangle, The first arrangement grooves are provided on both sides of the top recessed portion along the width direction, 8. The actuator device according to claim 7, wherein each of the second arrangement grooves is recessed from the first contact surface and the second contact surface, respectively.

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