Actuator device
By using magnets to attract steel belts and scraping units in the actuator device, the problem of insufficient waterproofness between relative moving members is solved, and efficient waterproofing and dustproofing effect is achieved, achieving IP68-level protection capability.
Patent Information
- Application Number
- CN202310965312.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-06-29
- Filing Date
- 2023-08-02
- Publication Date
- 2024-12-31
AI Technical Summary
The existing actuator devices have insufficient waterproof design between relatively moving components, and cannot effectively prevent moisture and dust from entering.
An actuator device is designed, including a base unit, a slide unit, a scraping unit and a drive unit. It uses a magnet to attract steel strips for shielding, and scrapes moisture and dust on the surface of the steel strips through the scraping unit, combining with elastic parts. The elastic action of the slightest effect can effectively remove moisture and dust.
It effectively prevents moisture and dust from infiltration, extends the service life of the device, and achieves better waterproof and dustproof effects, achieving IP68-level protection capability.
Smart Images
Figure CN119231818A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a linear actuation device, and in particular to an actuator device. Background Art
[0002] Patent case JP6025625 discloses that a dehumidification unit is added to an actuator device to reduce internal humidity.
[0003] In addition, the patent case of JP5968732 discloses that the actuator is easy to assemble and disassemble, and can improve the dustproof and waterproof performance. A front cover seal is sandwiched between a housing body and a front bracket, and a rear cover seal is sandwiched between the housing body and a rear cover.
[0004] Therefore, foreign matter can be reliably prevented from entering, and water droplets and dust will not enter a housing at both end surfaces of the outer body, which can improve the dustproof and waterproof performance of the actuator. Since the front bracket is provided with a first rod seal and a second rod seal, the first rod seal is installed on the outside of the housing, and the second rod seal is installed on the inside of the housing. Therefore, even if foreign matter, water droplets, etc. enter from the gap between the first rod seal and the opposite rod, the second rod seal can prevent foreign matter, water droplets, etc. from entering the housing. In addition, a soft wiper is provided on the rear end side of the inner circumferential surface of the first rod seal, and the first rod seal is wiped by the soft wiper. Foreign matter, water droplets, etc. can be captured between the first rod seal and the second rod seal. The first rod seal and the second rod seal can prevent foreign matter such as grease and wear powder generated inside the housing from flowing out from the inside of the housing to the outside.
[0005] However, the above patent case does not design for waterproofness between components in relative motion. Summary of the invention
[0006] An object of the present invention is to provide an actuator device capable of improving the waterproofness between relatively moving members.
[0007] The actuator device of the present invention comprises a base unit, a slide unit, a scraping unit and a driving unit. The base unit extends along the long axis and comprises a base, two magnets arranged on the base at intervals along the short axis perpendicular to the long axis, and a steel belt installed on the base. The cross section of the base parallel to the short axis is inverted U-shape and defines a accommodating space with an opening facing downward. The magnets extend along the long axis and are respectively arranged outside the open ends of the accommodating space. The steel belt shields the open ends of the accommodating space and is magnetically attracted by the magnets. The steel belt has an inner side surface adjacent to the accommodating space, an outer side surface opposite to the inner side surface, and a wear-resistant material layer fixed on the outer side surface. The slide unit can be slidably installed on the base unit along the long axis, and comprises a slide and a nut seat connected to the slide. The slide has a through groove extending along the long axis and for the steel belt to pass through, and multiple contact points are generated between the slide and the outer side surface of the steel belt. The scraping unit is mounted on the slide unit and has a scraper that abuts against the wear-resistant material layer. The driving unit is mounted on the base unit and includes a driving member and a lead screw driven by the driving member and screwed into the nut seat. Starting the driving member can drive the lead screw to rotate and drive the slide unit to move relative to the base unit along the long axis.
[0008] The actuator device described in the present invention, the slide table of the slide unit has a pair of first slots arranged along the long axis, and a pair of second slots arranged along the short axis and connected to the first slots, the scraper of the scraper unit is installed in the first slot and the second slot, the scraper unit also includes a plurality of elastic members arranged between the scraper and the slide table, the elastic force of the elastic members provides a tendency for the scraper to press against the base and the outer side surface of the steel belt.
[0009] In the actuator device of the present invention, the base unit further comprises an oil filling hole arranged on the base, the slide table of the slide unit comprises a one-way oil filling valve which can be relative to the oil filling hole, and an oil circuit group connected to the one-way oil filling valve.
[0010] The actuator device described in the present invention, the slide unit also includes two oil guide sleeves installed on the slide, two ball circulators installed on the slide, and two ball groups installed in the ball circulators, at least one of the oil guide sleeves has an oil guide groove, and the oil guide groove is connected to the lead screw and the ball circulator.
[0011] According to the actuator device of the present invention, at least one of the oil guide sleeves of the sliding seat unit has an inner end face relative to the nut seat, an outer end face opposite to the inner end face along the axis, an outer annular surface connected between the inner end face and the outer end face, an inner annular surface opposite to the outer annular surface and surrounding a defined inner hole, an inlet hole connected from the outer annular surface to the oil guide groove, a first outlet hole connected from the oil guide groove to the inner annular surface, and two second outlet holes connected from the oil guide groove to the outer annular surface, the oil guide groove being recessed from the inner end face and forming a C shape around the axis, the inlet hole, the oil guide groove and the first outlet hole jointly defining a first oil circuit, the inlet hole, the oil guide groove and the second outlet hole jointly defining a second oil circuit, the oil circuit group comprising the first oil circuit and the second oil circuit, the first oil circuit supplies oil to the lead screw, and the second oil circuit supplies oil to the ball circulator.
[0012] The actuator device described in the present invention, the slide of the slide unit has a main seat body, a first side seat body connected to one side of the main seat body, and a second side seat body opposite to the first side seat body along the long axis and connected to the other side of the main seat body, the through groove is defined by an upper groove wall and a lower groove wall, the upper groove wall corresponds to the main seat body, and the lower groove wall extends from the first side seat body toward the second side seat body.
[0013] The actuator device described in the present invention, the lower groove wall surface of the sliding seat unit has a first stop surface portion located in the first side seat body and bulging out in a circular arc shape toward the inside of the accommodating space, a second stop surface portion located in the second side seat body and bulging out in a circular arc shape toward the inside of the accommodating space, and a groove top surface portion between the first stop surface portion and the second stop surface portion and recessed in a step shape toward the outside of the accommodating space relative to the first stop surface portion and the second stop surface portion, the upper groove wall surface has a top supporting surface portion bulging out in a circular arc shape toward the through groove, and a steel belt inserted in the through groove generates the contact portions with the first stop surface portion, the second stop surface portion, and the top supporting surface portion respectively.
[0014] In the actuator device described in the present invention, the first card slot and the second card slot of the slide unit are interconnected and rectangular, the first card slot is arranged on both sides of the slot top surface along the short axis, and the second card slot is recessed by the first stop surface and the second stop surface respectively.
[0015] In the actuator device of the present invention, the slide table also forms a contact portion with the inner side surface of the steel belt.
[0016] The beneficial effects of the present invention are as follows: by utilizing the steel belt to shield the open end of the accommodating space and being magnetically attracted by the magnet, a close shielding effect can be produced, and when the driving member is started and the slide unit is driven to move relative to the base unit, a scraping unit is utilized to scrape off moisture and dust on the surface of the steel belt, thereby preventing moisture and dust from penetrating into the base unit and the slide unit, thereby achieving the purpose of extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a bottom-up stereoscopic composite diagram of an embodiment of an actuator device of the present invention;
[0018] Figure 2 is a bottom-up exploded perspective view of the embodiment;
[0019] Figure 3 is a combined cross-sectional view of this embodiment;
[0020] Figure 4 is along Figure 3 The cross-sectional view taken along the straight line IV-IV in FIG.
[0021] Figure 5 yes Figure 3 A partial enlarged schematic diagram of
[0022] Figure 6 yes Figure 4 A partial enlarged schematic diagram of
[0023] Figure 7 yes Figure 6 A three-dimensional schematic diagram of
[0024] Figure 8 is along Figure 5 A sectional view taken along the line VIII-VIII in FIG.
[0025] Fig. 9 is a three-dimensional exploded view of a slide table of the embodiment;
[0026] Fig.10 It is a three-dimensional view of an oil guide sleeve of this embodiment. DETAILED DESCRIPTION
[0027] See also Figure 1 and Figure 2 An embodiment of the actuator device of the present invention includes a base unit 10, a slide unit 20, a scraper unit 30 and a drive unit 40.
[0028] With reference Figure 3 and Figure 4The base unit 10 extends along a long axis X and includes a base 11, two magnets 12 spaced apart on the base 11 along a short axis Y perpendicular to the long axis X, and a steel belt 13 mounted on the base 11.
[0029] With reference Figure 8 The cross section of the base 11 parallel to the minor axis Y is in an inverted U shape, and has a top wall 111, two side walls 112 connected to the top wall 111, and two end seats 113. The top wall 111 and the side walls 112 together define a accommodating space 114 with an opening facing downward. Each of the side walls 112 has a bottom surface 115 and an embedding groove 116 recessed upward from the bottom surface 115. One of the side walls 112 has an oil filling hole 117 close to one of the end seats 113, and a detachable cover 118 that closes the oil filling hole 117.
[0030] The magnets 12 extend along the long axis direction X and are respectively disposed outside the open end of the accommodating space 114 and respectively embedded in the embedding grooves 116 .
[0031] The steel belt 13 covers the open end of the accommodating space 114 and is magnetically attracted by the magnet 12. The steel belt 13 has two opposite ends fixed to the end seat 113, and has an inner side surface 131 adjacent to the accommodating space 114, an outer side surface 132 opposite to the inner side surface 131, and a wear-resistant material layer 133 fixed to the outer side surface 132 (see Figure 6 ).
[0032] The slide unit 20 can be installed on the base unit 10 slidably along the long axis X, and includes a slide 21, a nut seat 22 connected to the slide 21, two oil guide sleeves 23 installed on the slide 21, two side covers 24 installed on one side of the oil guide sleeve 23, and two ball circulators 25 installed on the slide 21 (see Figure 8 ), and two ball groups 26 (see Figure 8 ).
[0033] With reference Figure 6 , Figure 8 and Fig. 9The slide 21 has a main seat 27, a first side seat 28 connected to one side of the main seat 27, and a second side seat 29 connected to the other side of the main seat 27 opposite to the first side seat 28 along the long axis X, a through groove 211 extending along the long axis X and for the steel belt 13 to pass through, a pair of first grooves 212 arranged along the long axis X, a pair of second grooves 213 arranged along the short axis Y and connected to the first grooves 212, a one-way oil injection valve 214 that can be opposite to the oil injection hole 117, and an oil circuit group 215 connected to the one-way oil injection valve 214. Figure 6 and Figure 7 As shown, the through groove 211 is defined by an upper groove wall 216 and a lower groove wall 217. The upper groove wall 216 corresponds to the main seat body 27 and has a supporting surface 216' that bulges toward the through groove 211 in an arc shape. The lower groove wall surface 217 extends from the first side seat body 28 toward the second side seat body 29, and has a first stop surface 217' located in the first side seat body 28 and bulging toward the inside of the accommodating space 114 in the shape of an arc surface, a second stop surface 217" located in the second side seat body 29 and bulging toward the inside of the accommodating space 114 in the shape of an arc surface, and a groove top surface 210 between the first stop surface 217' and the second stop surface 217" and recessed toward the outside of the accommodating space 114 relative to the first stop surface 217' and the second stop surface 217" in the shape of a drop. The first stop surface 217' is higher outside and lower inside, and gradually deviates toward the groove top surface 210 when extending from the outside toward the groove top surface 210, and the second stop surface 217" is higher outside and lower inside, and gradually deviates toward the groove top surface 210 when extending from the outside toward the groove top surface 210. The outer side surface 132 of the steel strip 13 passing through the through groove 211 forms two contact parts with the first stop surface 217' and the second stop surface 217", and the inner side surface 131 of the steel strip 13 forms one contact part with the top support surface 216'. The first card groove 212 and the second card groove 213 are interconnected and rectangular, and the first card groove 212 is arranged on both sides of the groove top surface 210 along the short axis direction Y, and the second card groove 213 is recessed by the first stop surface 217' and the second stop surface 217".
[0034] With reference Figure 5 , Figure 8 and Fig.10The oil guide sleeves 23 each have an inner end face 231 relative to the nut seat 22, an outer end face 232 opposite to the inner end face 231 along an axis L, an outer ring face 233 connected between the inner end face 231 and the outer end face 232, an inner ring face 235 opposite to the outer ring face 233 and surrounding an inner hole 234, an oil guide groove 236 recessed by the inner end face 231 and C-shaped around the axis L, an inlet hole 237 connected from the outer ring face 233 to the oil guide groove 236, a first outlet hole 238 connected from the oil guide groove 236 to the inner ring face 235, and two second outlet holes 239 connected from the oil guide groove 236 to the outer ring face 233. The inlet hole 237, the oil guide groove 236 and the first outlet hole 238 jointly define a first oil path 215'. The inlet hole 237 , the oil guide groove 236 and the second outlet hole 239 together define a second oil circuit 215 ″. The oil circuit assembly 215 includes the first oil circuit 215 ′ and the second oil circuit 215 ″. The second oil circuit 215 ″ defined by the inlet hole 237 , the oil guide groove 236 and the second outlet hole 239 supplies oil to the ball circulator 25 .
[0035] With reference Figure 5 The side covers 24 each have a C-shaped seal 241 that can close the open end of the oil guide groove 236.
[0036] With reference Figure 6 and Figure 7 The scraping unit 30 is installed in the first slot 212 and the second slot 213 of the slide unit 20, and has a scraper 31 that abuts against the wear-resistant material layer 133, and a plurality of elastic members 32 disposed between the scraper 31 and the slide 21. The scraper 31 is in a rectangular hollow frame shape and can be installed in the first slot 212 and the second slot 213 in a floating manner. The elastic force of the elastic member 32 provides a tendency for the scraper 31 to abut against the outer side surface 132 of the base 11 and the steel belt 13.
[0037] The driving unit 40 is mounted on the base unit 10 and includes a driving member 41 and a lead screw 42 driven by the driving member 41 and screwed to the nut seat 22. Starting the driving member 41 can drive the lead screw 42 to rotate and drive the slide unit 20 to move relative to the base unit 10 along the long axis X. Figure 8 The first oil passage 215 ′ defined by the inlet hole 237 , the oil guide groove 236 and the first outlet hole 238 supplies oil to the lead screw 42 .
[0038] In order to further understand the effects of the various components of the present invention, the technical means used, and the expected effects to be achieved, the following description will be given. It is believed that this will provide a deeper and more specific understanding of the present invention.
[0039] like Figure 1 , Figures 3 to 8 As shown, when the actuator device of the present invention is assembled as a whole, the slide unit 20 is sleeved on the base unit 10, and the nut seat 22 is screwed on the lead screw 42 of the drive unit 40, the steel belt 13 is shielded at the open end of the accommodating space 114 and is magnetically attracted by the magnet 12, the scraper 31 of the scraper unit 30 is acted upon by the elastic force of the elastic member 32, and the end of the scraper 31 is stopped at the wear-resistant material layer 133. When the drive member 41 is started, the lead screw 42 can be rotated, and by utilizing the screwing relationship between the lead screw 42 and the nut seat 22, the rotation of the lead screw 42 can drive the slide unit 20 to move relative to the base unit 10 along the long axis X, and achieve the expected processing and conveying operation.
[0040] When the slide unit 20 is displaced relative to the base unit 10 , the steel belt 13 is attracted to the bottom of the base 11 by the magnetic attraction of the magnet 12 , so that the steel belt 13 is adsorbed to the bottom of the base 11 and shields the open end of the accommodating space 114 .
[0041] When the slide unit 20 is displaced relative to the base unit 10, two contact portions are formed between the outer side surface 132 of the steel belt 13 passing through the through groove 211 and the first stop surface portion 217' and the second stop surface portion 217", and one contact portion is formed between the inner side surface 131 of the steel belt 13 and the supporting surface portion 216', so that the slide unit 20 can be displaced smoothly relative to the base unit 10. The outer side surface 132 of the steel belt 13 is provided with a wear-resistant material layer 133, which prevents the steel belt 13 from being scratched.
[0042] The elastic force of the elastic member 32 provides a tendency for the scraper 31 to abut against the base 11 and the outer side surface 132 of the steel belt 13, so that the end of the scraper 31 can be elastically pressed against the steel belt 13. The scraper 31 is in a rectangular hollow frame shape, which can produce a better shielding effect on the inside of the slide unit 20. When the slide unit 20 is displaced relative to the base unit 10, the scraper 31 is used to scrape off moisture and dust on the surface of the wear-resistant material layer 133 of the steel belt 13.
[0043] When the slide unit 20 is driven and slides to one end of the base unit 10 (the end away from the driving member 41), the oil injection hole 117 is aligned with the one-way oil injection valve 214, and the slide unit 20 is located at an oil injection position (return position). An oil injection gun (not shown) can be aligned with the oil injection hole 117 and oil can be injected through the one-way oil injection valve 214. After the oil is injected, the first oil path 215' defined by the introduction hole 237, the oil guide groove 236 and the first outlet hole 238 is used to supply oil to the lead screw 42. At the same time, the second oil passage 215" defined by the introduction hole 237, the oil guide groove 236 and the second outlet hole 239 is also used to supply oil to the ball circulator 25. Since the first oil passage 215' and the second oil passage 215" are not of equal length, a pressure difference will be generated when the oil enters the terminal. Therefore, the introduction hole 237 is designed to be a gradually expanding diameter (such as Figure 5 and Fig.10 As shown), the final oil entry can be homogenized.
[0044] The base 11 is installed downwardly, which can produce a better internal and external isolation effect, thereby achieving a sealed waterproof and dustproof effect.
[0045] Therefore, the present invention utilizes the overall configuration to achieve IP68 waterproof and dustproof effects (IP is the abbreviation of Ingress Protection. The waterproof and dustproof level is an international standard that defines the level of protection of the device against foreign body intrusion. No additional protective cover or protective shell is required. Under the IP68 level, the device can be immersed in fresh water at a depth of 1.5m for up to 30 minutes and can prevent dust from entering).
[0046] In summary, the actuator device of the present invention has a simple overall structure, is easy to manufacture and assemble, and can achieve a better waterproof level, thereby truly achieving the purpose of the present invention.
Claims
1. An actuator device, comprising a base unit, a slide unit, a scraping unit and a driving unit, characterized in that: The base unit extends along the long axis and includes a base, two magnets arranged on the base at intervals along a short axis perpendicular to the long axis, and a steel belt installed on the base, the cross section of the base parallel to the short axis is inverted U-shape and defines a accommodating space with an opening facing downward, the magnets extend along the long axis and are respectively arranged outside the open ends of the accommodating space, the steel belt shields the open ends of the accommodating space and is magnetically attracted by the magnets, and the steel belt has an inner side surface adjacent to the accommodating space, an outer side surface opposite to the inner side surface, and a wear-resistant material layer fixedly covered on the outer side surface; The slide unit is slidably mounted on the base unit along the long axis, and includes a slide table and a nut seat connected to the slide table. The slide table has a through groove extending along the long axis and for the steel belt to pass through, and multiple contact points are generated between the slide table and the outer side surface of the steel belt; The scraping unit is mounted on the slide unit and has a scraper that abuts against the wear-resistant material layer; The driving unit is installed on the base unit and includes a driving member and a lead screw driven by the driving member and screwed into the nut seat. Starting the driving member can drive the lead screw to rotate and drive the slide unit to move relative to the base unit along the long axis.
2. The actuator device according to claim 1, characterized in that: The slide table of the slide unit has a pair of first slots arranged along the long axis, and a pair of second slots arranged along the short axis and connected to the first slots. The scraper of the scraper unit is installed in the first slot and the second slot. The scraper unit also includes a plurality of elastic members arranged between the scraper and the slide table. The elastic force of the elastic members provides a tendency for the scraper to press against the base and the outer side surface of the steel belt.
3. The actuator device according to claim 1, characterized in that: The base unit further comprises an oil filling hole arranged on the base, and the slide table of the slide seat unit comprises a one-way oil filling valve which can be opposite to the oil filling hole, and an oil circuit group connected with the one-way oil filling valve.
4. The actuator device according to claim 3, characterized in that: The slide unit also includes two oil guide sleeves installed on the slide, two ball circulators installed on the slide, and two ball groups installed in the ball circulators. At least one of the oil guide sleeves has an oil guide groove, and the oil guide groove is connected to the lead screw and the ball circulator.
5. The actuator device according to claim 4, characterized in that: At least one of the oil guide sleeves of the sliding seat unit has an inner end face relative to the nut seat, an outer end face opposite to the inner end face along the axis, an outer annular surface connected between the inner end face and the outer end face, an inner annular surface opposite to the outer annular surface and surrounding a defined inner hole, an inlet hole connected from the outer annular surface to the oil guide groove, a first outlet hole connected from the oil guide groove to the inner annular surface, and two second outlet holes connected from the oil guide groove to the outer annular surface, the oil guide groove being recessed from the inner end face and forming a C shape around the axis, the inlet hole, the oil guide groove and the first outlet hole jointly defining a first oil circuit, the inlet hole, the oil guide groove and the second outlet hole jointly defining a second oil circuit, the oil circuit group comprising the first oil circuit and the second oil circuit, the first oil circuit supplying oil to the lead screw, and the second oil circuit supplying oil to the ball circulator.
6. The actuator device according to claim 2, characterized in that: The slide table of the slide unit has a main seat body, a first side seat body connected to one side of the main seat body, and a second side seat body opposite to the first side seat body along the long axis and connected to the other side of the main seat body, the through groove is defined by an upper groove wall and a lower groove wall, the upper groove wall corresponds to the main seat body, and the lower groove wall extends from the first side seat body toward the second side seat body.
7. The actuator device according to claim 6, characterized in that: The lower groove wall surface of the sliding seat unit has a first stop surface portion located in the first side seat body and bulging in a circular arc shape toward the interior of the accommodating space, a second stop surface portion located in the second side seat body and bulging in a circular arc shape toward the interior of the accommodating space, and a groove top surface portion between the first stop surface portion and the second stop surface portion and recessed in a step shape toward the outside of the accommodating space relative to the first stop surface portion and the second stop surface portion. The upper groove wall surface has a top supporting surface portion bulging in a circular arc shape toward the through groove, and a steel belt inserted in the through groove respectively generates the contact parts with the first stop surface portion, the second stop surface portion, and the top supporting surface portion.
8. The actuator device according to claim 7, characterized in that: The first card slot and the second card slot of the slide unit are interconnected and rectangular, the first card slot is arranged on both sides of the slot top surface along the short axis, and the second card slot is recessed by the first stop surface and the second stop surface respectively.
9. The actuator device according to claim 1, characterized in that: The slide table also forms a contact portion with the inner side surface of the steel strip.