Actuator Device

Abstract

To provide an actuator device having a dustproof and waterproof effect even between members executing relative movement.SOLUTION: An actuator device includes: a pedestal unit 10 extending along an axial direction X; a slider unit 20 movably attached to the pedestal unit 10 along the axial direction X; pressure adjusting means 30; and driving means 40. The pressure adjusting means 30 is configured to evacuate the air in a housing space 111 surrounded by the pedestal body 11 of the pedestal unit 10 only in one direction to the outside of the pedestal unit 10 from a vent hole 15 formed in a first side block 12 of the pedestal unit 10, so that the pressure adjustment means can adjust the air pressure in the housing space 111 and contribute to improving the dustproof and waterproof performance.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 for providing dust-proof and waterproof effects between members that perform relative motion. For example, in Patent Document 2, when the slide block is driven, air flows are generated inside the housing body, so the housing body cannot provide strict airtight performance and cannot provide excellent dust-proof and waterproof effects. [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 an axial direction, a slider unit attached to the base unit so as to be movable along the axial direction, a pressure adjusting means, and a driving means, the base unit is configured to include a base body extending along an axial direction and surrounding an accommodation space, a first side block connected to one end of the base body and having an air hole extending from the outside to the accommodation space, a first oil injection hole, and an oil injection nozzle attached to the first oil injection hole so as to extend to the accommodation space, and a second side block connected to another end opposite the one end in the axial direction, the slider unit is configured to include a slide block attached to the base unit so as to be movable along the axial direction, a passive member connected to the slide block, and a connection hole disposed between the slide block and the base unit so as to communicate with the oil injection nozzle, the pressure adjustment means is configured to have an air vent formed in the first side block, and to exhaust air in only one direction from the accommodation space to the outside of the base unit; The actuator device is characterized in that the driving means is disposed on the base unit and configured to drive the relative movement of the slider unit with respect to the base unit. Effect of the Invention

[0010] According to the above configuration, when the slider unit approaches the first side block by driving the driving means, the first oil injection hole and oil injection nozzle of the first side block supply oil to the slider unit, and the slip stream generated when the slider unit moves relative to the base unit is discharged to the outside via the pressure adjustment means, thereby adjusting the internal pressure of the base unit and providing excellent dustproofing and waterproofing effects. [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. 2 is a perspective view of the oil guide base in the embodiment. [Figure 4] FIG. 2 is a perspective view of the oil guide base in the embodiment. [Diagram 5] FIG. [Figure 6] FIG. 6 is an enlarged explanatory view of a part of FIG. 5. [Figure 7] FIG. 6 is an enlarged explanatory view of another part of FIG. [Figure 8] FIG. 7 is a cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] FIG. 7 is a cross-sectional view taken along line IX-IX in FIG. [Figure 10] FIG. 8 is a cross-sectional view taken along line XX in FIG. 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 Figures 1 and 2, the illustrated embodiment of the actuator device of the present invention comprises a base unit 10 extending along an axial direction X, a slider unit 20 movably mounted relative to the base unit 10 along the axial direction X, a pressure adjustment means 30, and a drive means 40.

[0014] Referring also to Figures 5 to 9, the base unit 10 is configured to have a base body 11 extending along the axial direction X and surrounding the storage space 111, a first side block 12 connected to one end of the base body 11 and having an air vent 15 extending from the outside to the storage space 111, a first oil injection hole 131 and an oil injection nozzle 132 attached to the first oil injection hole 131 so as to extend to the storage space 111, and a second side block 16 connected to another end of the base body 11 on the opposite side to the above-mentioned one end in the axial direction X.

[0015] The first side block 12 of the base unit 10 has an oil injection stand 13 fixed to the base body 11 and an air discharge stand 14 fixed to the side of the base body 11 opposite to the oil injection stand 13, and the first oil injection hole 131 and the oil injection nozzle 132 are arranged in the oil injection stand 13. The air vent 15 has a first hole portion 151 formed in the air discharge stand 14 and a second hole portion 152 formed in the oil injection stand 13.

[0016] 7 and 10, the second side block 16 of the base unit 10 has a side block main body 161 connected to the base main body 11 and a side cap 162 attached to the side block main body 161, and an oil storage chamber 163 communicating with a hollow pipe 43 (described later) is defined between the side block main body 161 and the side cap 162. Also, a second oil injection hole 164 is formed in the second side block 16, and oil can be injected between the second side block 16 and the hollow pipe 43 (described later) via the second oil injection hole 164.

[0017] 6 and 8, the slider unit 20 includes a slide block 21 attached to the base unit 10 so as to be movable along the axial direction X, a passive member 22 connected to the slide block 21, two bead bearing means 23 arranged on the slide block 21 and each having a bead set 24 consisting of a plurality of beads, and an oil guide base 25 in which a connection hole 251 and an oil guide groove 252 that connects the connection hole 251 to the bead bearing means 23 are formed. The connection hole 251 is formed in the oil guide base 25 so as to communicate with the oil injection nozzle 132 and to be arranged between the slide block 21 and the base unit 10.

[0018] The pressure adjustment means 30 is disposed in the ventilation hole 15 formed in the first side block 12, and is configured to exhaust air in only one direction from the accommodation space 111 to the outside of the base unit 10. The pressure adjustment means 30 has a valve body 31 and a unidirectional film 32 attached inside the valve body 31 and allowing air to flow only from the accommodation space 111 to the outside of the base unit 10, and the unidirectional film 32 in the pressure adjustment means 30 can be made of polytetrafluoroethylene.

[0019] The driving means 40 is disposed on the base unit 10 and configured to drive the relative movement of the slider unit 20 with respect to the base unit 10 .

[0020] Specifically, the driving means 40 includes a rotational driving unit 41 arranged on the side opposite the side of the air discharge table 14 facing the oil injection table 13, a power output shaft 42 that is rotationally driven by the rotational driving unit 41 and is screwed into the passive member 22 to transmit the driving force from the rotational driving unit 41 to the passive member 22 to drive the passive member 22 along the axial direction X, and a hollow pipe 43 that extends from an inner end 431 connected to the slide block 21 to an outer end 432 exposed outside the second side block 16, is movable relative to the power output shaft 42 together with the slide block 21, and has the power output shaft 42 inserted into the pipe.

[0021] The power output shaft 42 has a connecting portion 421 that is inserted into the first hole portion 151 of the air discharge table 14 and the second hole portion 152 of the oil injection table 13, a tip portion 422 on the opposite side of the connecting portion 421, and a movable ring 423 that is attached to the tip portion 422 (i.e., the tip remote from the rotation drive portion 41).

[0022] The hollow pipe 43 has an inner end 431 connected to the slide block 21, an outer end 432 located opposite to the inner end 431 and exposed to the outside of the second side block 16 by passing through the second side block 16, an outer circumferential surface 433 extending from the inner end 431 to the outer end 432, and an inner circumferential surface 435 surrounding a hollow portion 434 on the opposite side (inside) of the outer circumferential surface 433. The oil storage chamber 163 of the second side block 16 is adjacent to the outer circumferential surface 433 of the hollow pipe 43, and can supply oil to the space between the hollow pipe 43 and the second side block via the second oil injection hole 164. The outer circumferential surface of the movable ring 423 on the power output shaft 42 side movably abuts against the inner circumferential surface 435 of the hollow pipe 43, thereby suppressing the swinging of the tip portion 422 not supported by the power output shaft 42 and improving its stability.

[0023] The operating state of the actuator device of the present invention will be described in detail below with reference to Figures 1 and 5 to 7. First, in the slider unit 20 attached to the base unit 10, the passive member 22 is screwed onto the power output shaft 42 of the drive means 40. When the rotation drive section 41 is started to rotate the power output shaft 42, the passive member 22 and the slide block 21 (i.e., the slider unit 20) can be moved relative to the base unit 10 along the axial direction X by the rotation of the power output shaft 42, thereby making it possible to transport a workpiece or provide a linear propulsive force.

[0024] When the slider unit 20 moves relative to the base unit 10, the hollow pipe 43, whose inner end 431 is connected to the slide block 21, moves together with the slide block 21, and therefore moves relative to the second side block 16 and the power output shaft 42 through which it is inserted.

[0025] When the driven slider unit 20 moves to the oil injection position in the middle of the base unit 10 (a position closer to the first side block 12) and the oil guide base 25 on the slider unit 20 side faces the oil injection nozzle 132 on the base unit 10 side and they become connected to each other, oil is injected through the first oil injection hole 131 and the oil injection nozzle 132, and oil is supplied to each bead bearing means 23 through the oil guide groove 252, and the relative movement between the slide block 21 and the base unit 10 can be performed smoothly due to the action of the bead bearing means 23 filled with oil. In addition, when oil is injected through the second oil injection hole 164, the injected oil is provided to the oil storage chamber 163, and since the oil storage chamber 163 is adjacent to the outer surface 433 of the hollow pipe 43, oil can be supplied to the space between the hollow pipe 43 and the second side block 16, and the relative movement between the base unit 10 and the hollow pipe 43 can be performed more smoothly.

[0026] In particular, when the slider unit 20 moves relative to the base unit 10, a slipstream occurs in the storage space 111. Therefore, a one-way film 32 on the valve body 31 of the pressure adjustment means 30 is used to adjust the air pressure in the storage space 111 so that it is discharged from the storage space 111 to the outside of the base unit 10 through the air vent 15, and water, dust, etc. can be prevented from entering the storage space 111 via the pressure adjustment means 30, thereby improving dustproof and waterproof performance.

[0027] Therefore, the present invention can achieve dustproof and waterproof performance of IP68 (Ingress Protection) by utilizing the overall layout relationship.

[0028] 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.

[0029] 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. The present disclosure also includes the following inventions. The first aspect is An actuator device comprising: a base unit extending along an axial direction; a slider unit attached to the base unit so as to be movable along the axial direction; a pressure adjusting means; and a driving means, the base unit is configured to include a base body extending along an axial direction and surrounding an accommodation space, a first side block connected to one end of the base body and having an air hole extending from the outside to the accommodation space, a first oil injection hole, and an oil injection nozzle attached to the first oil injection hole so as to extend to the accommodation space, and a second side block connected to another end opposite the one end in the axial direction, the slider unit is configured to include a slide block attached to the base unit so as to be movable along the axial direction, a passive member connected to the slide block, and a connection hole disposed between the slide block and the base unit so as to communicate with the oil injection nozzle, the pressure adjustment means is arranged in the ventilation hole of the first side block, and is configured to exhaust air in only one direction from the accommodation space to the outside of the base unit; The actuator device is characterized in that the driving means is disposed on the base unit and configured to drive the relative movement of the slider unit with respect to the base unit. The second aspect is The actuator device of the first aspect is characterized in that the first side block of the base unit has an oil injection stand fixed to the base body and an air discharge stand fixed to the opposite side of the oil injection stand of the base body, the air vent has a first hole portion formed in the air discharge stand and a second hole portion formed in the oil injection stand, and the first oil injection hole and the oil injection nozzle are arranged on the oil injection stand. The third aspect is The driving means includes a rotary drive unit disposed on the opposite side of the air discharge table from the side facing the oil injection table; a power output shaft that is rotationally driven by the rotation drive unit and is screwed into the passive member to transmit a driving force from the rotation drive unit to the passive member to drive the passive member along the axial direction; a hollow pipe extending from an inner end connected to the slide block to an outer end exposed outside the second side block, movable together with the slide block relative to the power output shaft, and through which the power output shaft is inserted, In a second aspect, the actuator device is characterized in that a movable ring is attached to the tip of the power output shaft away from the rotation drive portion. The fourth aspect is The base unit is an actuator device in a first aspect, characterized in that a second oil injection hole is formed in the second side block, and oil can be injected between the second side block and the hollow pipe via the second oil injection hole. The fifth aspect is The second side block of the base unit has a side block body connected to the base body and a side cap attached to the side block body, and an oil storage chamber communicating with the hollow pipe is defined between the side block body and the side cap, which is an actuator device in a fourth aspect. The sixth aspect is The slider unit is an actuator device in a first aspect, characterized in that it has two bead bearing means arranged on the slide block, each having a bead set consisting of a plurality of beads, and an oil guide base in which is formed an oil guide groove connecting the connection hole and the bead bearing means. The seventh aspect is The pressure adjustment means is an actuator device in a first aspect, characterized in that it has a valve body and a one-way film attached within the valve body to allow only air to flow from the storage space to the outside of the base unit. The eighth aspect is In the actuator device according to a seventh aspect, the unidirectional film in the pressure adjustment means is made of polytetrafluoroethylene. [Explanation of symbols]

[0030] 10 Pedestal unit 11 Base body 111 Containment Space 12 First Side Block 13 Oil filling station 131 First oil filling hole 132 Oil injection nozzle 14 Air exhaust stand 15 Ventilation holes 151 First hole 152 Second hole 16 Second Side Block 161 Side block body 162 Side Cap 163 Oil Storage Room 164 Second oil fill hole 20 Slider Unit 21 Slide Block 22 Passive Components 23 Bead bearing means 24 Bead Set 25 Oil Information Desk 251 Connection hole 252 Oil guide groove 30 Pressure Regulating Means 31 Valve body 32 Unidirectional film 40 Driving means 41 Rotation drive unit 42 Power output shaft 421 Connecting part 422 Tip part 423 Movable Ring 43 Hollow Pipe 431 Inner end 432 Outer edge 433 Outer surface 434 Hollow part 435 Inner surface X-axis direction

Claims

1. An actuator device comprising: a base unit extending along an axial direction; a slider unit attached to the base unit so as to be movable along the axial direction; a pressure adjusting means; and a driving means, The base unit is configured to have a base body extending along an axial direction and surrounding an accommodation space, a first side block connected to one end of the base body and having an air hole extending from the outside to the accommodation space, a first oil injection hole, and an oil injection nozzle attached to the first oil injection hole so as to extend to the accommodation space, and a second side block connected to another end opposite to the one end in the axial direction, the slider unit is configured to include a slide block attached to the base unit so as to be movable along the axial direction, a passive member connected to the slide block, and a connection hole disposed between the slide block and the base unit so as to communicate with the oil injection nozzle, the pressure adjusting means is arranged in the ventilation hole of the first side block, and is configured to exhaust air in only one direction from the accommodation space to the outside of the base unit, the driving means is disposed on the base unit and configured to drive the relative movement of the slider unit with respect to the base unit; An actuator device characterized in that the first side block of the base unit has an oil injection stand fixed to the base body and an air discharge stand fixed to the opposite side of the oil injection stand of the base body, the air vent has a first hole portion formed in the air discharge stand and a second hole portion formed in the oil injection stand, and the first oil injection hole and the oil injection nozzle are arranged on the oil injection stand.

2. The driving means includes a rotary drive unit disposed on the opposite side of the air discharge table from the side facing the oil injection table; a power output shaft that is rotationally driven by the rotation drive unit and is screwed into the passive member to transmit a driving force from the rotation drive unit to the passive member to drive the passive member along the axial direction; a hollow pipe extending from an inner end connected to the slide block to an outer end exposed outside the second side block, movable together with the slide block relative to the power output shaft, and through which the power output shaft is inserted, 2. The actuator device according to claim 1, wherein a movable ring is attached to a tip of the power output shaft remote from the rotary drive portion.

3. 3. The actuator device according to claim 2, characterized in that the base unit has a second oil injection hole formed in the second side block, and oil can be injected between the second side block and the hollow pipe via the second oil injection hole.

4. 4. The actuator device according to claim 3, wherein the second side block of the base unit has a side block body connected to the base body and a side cap attached to the side block body, and an oil storage chamber communicating with the hollow pipe is defined between the side block body and the side cap.

5. 2. The actuator device according to claim 1, wherein the slider unit comprises: two bead bearing means arranged on the slide block, each having a bead set consisting of a plurality of beads; and an oil guide base in which is formed an oil guide groove that connects the connection hole with the bead bearing means.

6. 2. The actuator device according to claim 1, wherein the pressure adjusting means comprises a valve body and a one-way film attached within the valve body to allow only air to flow from the accommodating space to the outside of the base unit.

7. 7. The actuator device according to claim 6, wherein the unidirectional film in the pressure adjusting means is made of polytetrafluoroethylene.

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