Linear drive unit

Abstract

This invention provides a linear drive device, comprising: a stator; multiple movers slidably disposed on the stator; a drive assembly for driving the multiple movers to slide along the extension direction of the stator; a first position feedback unit, comprising multiple first position feedback units, each mover having one first position feedback unit, and one of the first position feedback units having a marker signal; and a second position feedback unit, comprising multiple second position feedback units, all disposed on the stator and arranged at intervals, the second position feedback units being used to read the position information of the first position feedback units and to read the marker signal. The linear drive device of this invention simplifies the mover identification method and eliminates the need for additional sensors, thereby reducing costs.

Description

[Technical Field]

[0001] This invention belongs to the field of linear drive technology, and particularly relates to a linear drive device. [Background Technology]

[0002] In a multi-mover direct-drive transmission system, each mover needs to be numbered and its position in the system needs to be identified in real time in order to effectively control and schedule all movers.

[0003] Regarding the sorting of multiple mover numbers, the existing method is to identify the number of the first mover in the multiple mover direct drive transmission system, and then sort and number them according to the sequence in ascending or descending order.

[0004] Currently, the methods for identifying movers in multi-motor direct-drive transmission systems include: 1. Changing the order of the magnets of a certain mover to distinguish it from the magnets of other movers, and determining the position of the mover by the difference in magnetic field; 2. Identifying a certain mover by a third-party position detection unit.

[0005] The first identification method mentioned above, which determines the position of the mover by magnetic field difference, is too cumbersome. The second identification method, which uses third-party sensors for detection and identification, requires additional sensors, which increases the cost of the system equipment.

[0006] Therefore, there is an urgent need for a linear drive device to solve the problem that the identification method of the mover in the existing multi-motor direct drive transmission system is too cumbersome and costly. [Summary of the Invention]

[0007] The technical problem to be solved by the present invention is how to provide a linear drive device to solve the problem that the identification method of the mover in the existing multi-motor direct drive transmission system is too cumbersome and costly.

[0008] This invention is implemented by providing a linear drive device, comprising:

[0009] Stator; the stator comprises multiple stators continuously spliced ​​together as a single unit;

[0010] The mover comprises multiple movers, all of which are slidably disposed on the stator;

[0011] A driving component for driving the plurality of movers to slide along the extension direction of the stator;

[0012] A first position feedback unit, comprising multiple units, is provided for each of the moving parts, and one of the first position feedback units is provided with a marker signal; and,

[0013] The second position feedback unit includes multiple second position feedback units, all of which are disposed on the stator and arranged at intervals. The second position feedback unit is disposed corresponding to the first position feedback unit. The second position feedback unit is used to read the position information of the first position feedback unit and can read the marker signal.

[0014] When any of the second position feedback units reads the marker signal, the second position feedback unit confirms the position of the corresponding mover, uses the mover at the confirmed position as a starting point, and sorts all the movers according to the position order of the other movers in the linear drive device to complete the numbering setting of all the movers.

[0015] Furthermore, the first position feedback unit is a grating ruler; the second position feedback unit is a reading head corresponding to the first position feedback unit.

[0016] Furthermore, the stator includes a base plate, a top plate spaced parallel to the base plate, and a fixing plate connecting the base plate and the top plate; a plurality of first position feedback units are respectively disposed on the side of the plurality of moving parts near the fixing plate, and a plurality of second position feedback units are spaced apart on the fixing plate.

[0017] Furthermore, the fixing plate is provided with a mounting slot corresponding to the position of each of the second position feedback units, and one of the second position feedback units is fixedly installed in each mounting slot.

[0018] Furthermore, a guide rail is provided on the side of the base plate near the top plate; at least two pulleys are provided at intervals on the side of each mover near the guide rail, and the at least two pulleys on each mover respectively abut against both sides of the guide rail and form a sliding connection, and the mover includes the ability to slide freely under the stator through the cooperation of the pulleys and the guide rail.

[0019] Furthermore, each of the moving parts includes a fixed portion spaced apart from the stator, two sliding plates spaced apart from each other on the side of the fixed portion near the guide rail, a mounting portion on the side of the fixed portion away from the base plate, an extension portion on the side of the mounting portion near the fixed plate, and a T-shaped structure portion on the side of the mounting portion away from the fixed plate; the two sliding plates on each moving part abut against both sides of the guide rail and form a sliding connection, and the two sliding plates on each moving part are spaced apart from their corresponding pulleys; the T-shaped structure portion extends to the side of the top plate away from the base plate and is spaced apart from the top plate; the pulleys on each moving part are all located on the side of their fixed portion near the guide rail, and the first position feedback unit on each moving part is all located on the side of its extension portion near the fixed plate.

[0020] Furthermore, each of the moving parts has four pulleys, and the four pulleys on each moving part are arranged in pairs and abut against both sides of the guide rail, with the sliding plate disposed between each pair of pulleys.

[0021] Furthermore, the drive assembly includes a plurality of coils disposed on the side of the top plate near the bottom plate and magnets disposed on the mounting portion of each of the movers, the magnets being positioned corresponding to and spaced apart from the coils.

[0022] Furthermore, the drive assembly also includes a first magnetic conductor disposed between the top plate and the plurality of coils, and a second magnetic conductor disposed between the corresponding mounting portion and the magnet; the first magnetic conductor has a plurality of protrusions that protrude toward the mover on the side near the bottom plate, and each coil is wound around one of the protrusions; the magnets include a plurality of magnets and are arranged at intervals on the second magnetic conductor.

[0023] Furthermore, the top plate is provided with a first recessed portion that is recessed away from the mover at the position corresponding to the first magnetic conductor, and the first magnetic conductor is disposed in the first recessed portion; the mounting portion of each mover is provided with a second recessed portion that is recessed away from the stator at the position corresponding to its second magnetic conductor, and the second magnetic conductor is disposed in the second recessed portion.

[0024] Compared with the prior art, the linear drive device of the present invention provides a first position feedback unit on each mover, and multiple second position feedback units are provided at position intervals on the stator corresponding to the first position feedback units. A marker signal is also provided on one of the first position feedback units. The second position feedback units are used to read the position information of the first position feedback units and can also read the marker signal. In this way, when identifying the mover, the marker signal can be read through the second position feedback units to determine the position of the mover corresponding to it. Then, when numbering all the movers, all the movers can be sorted based on the movers with obtained position information, thereby completing the numbering of all the movers. When identifying the mover based on this linear drive device, the identification method of the mover can be simplified, and since no additional sensors are required, the cost of the linear drive device can also be reduced. [Attached Image Description]

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of a linear drive device provided in an embodiment of the present invention;

[0027] Figure 2 This is an exploded view of the structure of a linear drive device provided in an embodiment of the present invention;

[0028] Figure 3 yes Figure 2 Enlarged view of the structure of section A;

[0029] Figure 4 This is a front view of the structure of a linear drive device provided in an embodiment of the present invention;

[0030] Figure 5 yes Figure 4 A sectional view of line B-B in the middle;

[0031] Figure 6 This is a schematic diagram of the structure of the mover and its surrounding components in a linear drive device provided by an embodiment of the present invention;

[0032] Figure 7 This is a simplified plan view of the first position feedback unit and the second position feedback unit in a linear drive device provided in an embodiment of the present invention.

[0033] Wherein: 100, linear drive device; 1, stator; 11, base plate; 12, side plate; 13, top plate; 131, first recess; 14, fixing plate; 141, mounting groove; 15, guide rail; 151, first slide groove; 2, mover; 21, pulley; 211, second slide groove; 22, fixing part; 23, sliding plate; 231, third slide groove; 24, mounting part; 241, second recess; 25, extension part; 26, T-shaped structure part; 3, drive assembly; 31, coil; 32, magnet; 33, first magnetic conductor; 331, protrusion; 34, second magnetic conductor; 4, first position feedback unit; 41, marking signal; 5, second position feedback unit; 6, transmission line.

Detailed Implementation Methods

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] This invention provides a linear drive device 100, combined with... Figures 1 to 7 As shown, it includes a stator 1, a mover 2, a drive assembly 3, a first position feedback unit 4, and multiple second position feedback units 5.

[0036] The stator 1 comprises multiple units continuously spliced ​​together as a single unit; the mover 2 comprises multiple units, all slidably disposed on the stator 1; the drive assembly 3 is used to drive the multiple movers 2 to slide along the extension direction of the stator 1; the first position feedback unit 4 comprises multiple units, each of the movers 2 is provided with a first position feedback unit 4, and one of the first position feedback units 4 is provided with a marker signal 41; the second position feedback unit 5 comprises multiple units, all of the second position feedback units 5 are disposed on the stator 1 and arranged at intervals, the second position feedback units 5 are correspondingly disposed with the first position feedback units, and the second position feedback units 5 are used to read the position information of the first position feedback units and can read the marker signal 41.

[0037] When any second position feedback unit 5 reads the marker signal 41, the second position feedback unit 5 confirms the position of the corresponding mover 2. The mover 2 whose position is confirmed is used as the starting point and sorts all the movers 2 according to the position order of the other movers 2 in the linear drive device 100 to complete the numbering setting of all the movers 2.

[0038] The second position feedback unit 5 is set in correspondence with the first position feedback unit 4, with the second position feedback unit 5 being able to cooperate with the first position feedback unit 4 to provide feedback on the position of the mover 2. It can also be understood that the second position feedback unit 5 and the first position feedback unit 4 are set directly opposite each other.

[0039] The number of mover 2, first position feedback unit 4 and second position feedback unit 5 is set according to actual needs, and no specific limit is made here.

[0040] In this embodiment, the stator 1 includes a base plate 11, a side plate 12 vertically disposed on the base plate 11, a top plate 13 disposed on the side of the side plate 12 away from the base plate 11 and parallel to the base plate 11, and a fixing plate 14 vertically connected to the base plate 11 and the top plate 13; a plurality of first position feedback units 4 are respectively disposed on the side of a plurality of movers 2 near the fixing plate 14, and a plurality of second position feedback units 5 are disposed at intervals on the fixing plate 14.

[0041] The edge of the top plate 13 is connected to the edge of the side plate 12; the fixing plate 14 is spaced apart from the side plate 12.

[0042] Multiple second position feedback units 5 are evenly arranged on the fixed plate 14 along the length of the guide rail 15.

[0043] In this embodiment, the fixing plate 14 is provided with a mounting slot 141 corresponding to the position of each second position feedback unit 5, and one second position feedback unit 5 is fixedly installed in each mounting slot 141. This facilitates the setting of the second position feedback unit 5 and eliminates the need for additional space for its arrangement.

[0044] In this embodiment, a guide rail 15 is provided on the side of the base plate 11 near the top plate 13; at least two pulleys 21 are provided at intervals on the side of each mover 2 near the guide rail 15, and the at least two pulleys 21 on each mover 2 abut against both sides of the guide rail 15 and form a sliding connection. This arrangement facilitates the sliding action between the mover 2 and the stator 1.

[0045] In this case, the guide rail 15 is provided with at least one pulley 21 on both sides of each moving part 2.

[0046] Both sides of the guide rail 15 are provided with inwardly recessed first grooves 151, and the peripheral wall of the pulley 21 is provided with inwardly recessed second grooves 211. One side wall of the second groove 211 in the pulley 21 is slidably disposed in the first groove 151, and one side wall of the first groove 151 in the guide rail 15 is slidably disposed in the second groove 211.

[0047] In this embodiment, each mover 2 includes a fixed part 22 spaced apart from the stator 1, two sliding plates 23 spaced apart from each other on the side of the fixed part 22 near the guide rail 15, a mounting part 24 on the side of the fixed part 22 away from the bottom plate 11, an extension part 25 on the side of the mounting part 24 near the fixed plate 14, and a T-shaped structure part 26 on the side of the mounting part 24 away from the fixed plate 14. The two sliding plates 23 on each mover 2 abut against the two sides of the guide rail 15 and form a sliding connection. The two sliding plates 23 on each mover 2 are spaced apart from their corresponding pulleys 21. The T-shaped structure part 26 extends to the side of the top plate 13 away from the bottom plate 11 and is spaced apart from the top plate 13. The pulleys 21 on each mover 2 are all located on the side of its fixed part 22 near the guide rail 15. The first position feedback unit 4 on each mover 2 is all located on the side of its extension part 25 near the fixed plate 14.

[0048] The slide plate 23 is provided with a third groove 231 that is recessed inward at one of the side walls of the first groove 151, and one of the side walls of the first groove 151 in the guide rail 15 is slidably disposed in the third groove 231.

[0049] In this embodiment, the four pulleys 21 on each mover 2 are arranged in pairs on both sides of the guide rail 15, and the first position unit on each mover 2 is arranged on the side of its extension 25 near the fixed plate 14.

[0050] In this configuration, the two sliding plates 23 on each mover 2 are symmetrically arranged and are positioned between the two pulleys 21 on the same side of the guide rail 15 on each mover 2.

[0051] In this embodiment, the drive assembly 3 includes a plurality of coils 31 disposed on the side of the top plate 13 near the bottom plate 11 and magnets 32 disposed on the mounting portion 24 of each mover 2. The positions of the magnets 32 and the coils 31 are corresponding and spaced apart.

[0052] The number of coils 31 is determined by actual needs and is not specifically limited here. However, the multiple coils 31 are arranged at uniform intervals along the length of the guide rail 15.

[0053] In this embodiment, the drive assembly 3 further includes a first magnetic conductor 33 disposed between the top plate 13 and the plurality of coils 31, and a second magnetic conductor 34 disposed between the corresponding mounting portion 24 and the magnet 32. The first magnetic conductor 33 has a plurality of protrusions 331 spaced apart on the side near the bottom plate 11, protruding toward the mover 2, and each coil 31 is wound around one of the protrusions 331. The magnets 32 include a plurality of magnets arranged at intervals on the second magnetic conductor 34. This arrangement can strengthen the magnetic force between the coils 31 and the magnets 32, so as to drive the mover 2 to slide along the guide rail 15.

[0054] The first magnetic conductor 33 can be a single piece or multiple pieces arranged close together; the second magnetic conductor 34 can be a single piece or multiple pieces arranged close together, and multiple magnets 32 are evenly arranged on the second magnetic conductor 34 and along the length of the guide rail 15.

[0055] In this embodiment, the top plate 13 has a first recess 131 recessed away from the mover 2 at the position corresponding to the first magnetic conductor 33, and the first magnetic conductor 33 is disposed in the first recess 131; the mounting portion 24 of each mover 2 has a second recess 241 recessed away from the stator 1 at the position corresponding to its second magnetic conductor 34, and the second magnetic conductor 34 is disposed in the second recess 241. This facilitates the installation and fixation of the first magnetic conductor 33 and the second magnetic conductor 34 without requiring additional space for their arrangement.

[0056] In this embodiment, the first position feedback unit 4 is a grating ruler, which can be one of incremental grating or magnetic grating or absolute grating or magnetic grating; the second position feedback unit 5 is a reading head corresponding to the first position feedback unit 4.

[0057] The marker signal 41 is a marker or marker position on the first position feedback unit 4 that can be read by the reading head. Here, no further restrictions are placed on the specific implementation of the marker signal.

[0058] In this embodiment, the first position feedback unit 4 is a grating scale, and the second position feedback unit 5 is a reading head corresponding to the grating scale. Multiple reading heads are all positioned directly opposite the grating scale on each mover 2.

[0059] In this embodiment, multiple reading heads and multiple coils 31 are electrically connected to external devices or systems via multiple transmission lines 6.

[0060] The working principle is as follows: when all the moving parts 2 move in one direction, the reading head reads the position information of the scale in real time; when a certain reading head identifies the mark signal 41, the position of that moving part 2 can be determined; then, according to the position sequence of all the moving parts 2 in the linear drive device 100, all the moving parts 2 are sorted, thereby completing the numbering of all the moving parts 2. In specific use, the validity of the mark signal identified by the reading head can also be judged based on a combination of various information.

[0061] Compared with the prior art, the linear drive device 100 in this embodiment provides a first position feedback unit 4 on each mover 2, and provides multiple second position feedback units 5 at intervals on the stator 1 corresponding to the first position feedback units 4. A marker signal 41 is also provided on one of the first position feedback units 4. The second position feedback units are used to read the position information of the first position feedback units 4 and can read the marker signal 41. In this way, when identifying the mover 2, the marker signal 41 can be read through the second position feedback unit 5 to determine the position of the mover 2 corresponding to it. Then, when numbering all the movers 2, all the movers 2 can be sorted based on the movers 2 after obtaining the position information, thereby completing the numbering of all the movers 2. When identifying the movers 2 based on the linear drive device 100, the identification method of the movers 2 can be simplified, and since no additional sensors are required, the cost of the linear drive device 100 can also be reduced.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A linear drive device, characterized in that, include: Stator; the stator comprises multiple stators continuously spliced ​​together as a single unit; The mover comprises multiple movers, all of which are slidably disposed on the stator; A driving component for driving the plurality of movers to slide along the extension direction of the stator; The first position feedback unit includes multiple units, each of the moving parts is provided with a first position feedback unit, and one of the first position feedback units is provided with a marker signal; as well as, The second position feedback unit includes multiple second position feedback units, all of which are disposed on the stator and arranged at intervals. The second position feedback unit is disposed corresponding to the first position feedback unit. The second position feedback unit is used to read the position information of the first position feedback unit and can read the marker signal. When any of the second position feedback units reads the marker signal, the second position feedback unit confirms the position of the corresponding mover, uses the mover at the confirmed position as a starting point, and sorts all the movers according to the position order of the other movers in the linear drive device to complete the numbering setting of all the movers.

2. The linear drive device as described in claim 1, characterized in that, The first position feedback unit is a grating ruler; the second position feedback unit is a reading head corresponding to the first position feedback unit.

3. The linear drive device as described in claim 1, characterized in that, The stator includes a base plate, a top plate spaced parallel to the base plate, and a fixing plate connecting the base plate and the top plate; a plurality of first position feedback units are respectively disposed on the side of the plurality of moving parts near the fixing plate, and a plurality of second position feedback units are spaced apart on the fixing plate.

4. The linear drive device as described in claim 3, characterized in that, The fixing plate is provided with a mounting slot corresponding to the position of each of the second position feedback units, and one of the second position feedback units is fixedly installed in each mounting slot.

5. The linear drive device as described in claim 3, characterized in that, A guide rail is provided on the side of the base plate near the top plate; at least two pulleys are provided at intervals on the side of each mover near the guide rail, and at least two pulleys on each mover abut against both sides of the guide rail and form a sliding connection, and the mover can slide freely under the stator through the cooperation of the pulleys and the guide rail.

6. The linear drive device as described in claim 5, characterized in that, Each of the moving parts includes a fixed part spaced apart from the stator, two sliding plates spaced apart from each other on the side of the fixed part near the guide rail, a mounting part on the side of the fixed part away from the base plate, an extension part on the side of the mounting part near the fixed plate, and a T-shaped structure part on the side of the mounting part away from the fixed plate. The two sliding plates on each moving part abut against both sides of the guide rail and form a sliding connection. The two sliding plates on each moving part are spaced apart from their corresponding pulleys. The T-shaped structure part extends to the side of the top plate away from the base plate and is spaced apart from the top plate. The pulleys on each moving part are all located on the side of their fixed part near the guide rail, and the first position feedback unit on each moving part is all located on the side of its extension part near the fixed plate.

7. The linear drive device as described in claim 6, characterized in that, Each of the moving parts has four pulleys, and the four pulleys on each moving part are arranged in pairs and abut against both sides of the guide rail. The slide plate is disposed between each pair of pulleys.

8. The linear drive device as described in claim 6, characterized in that, The drive assembly includes a plurality of coils disposed on the side of the top plate near the bottom plate and magnets disposed on the mounting portion of each of the movers, the magnets being positioned corresponding to and spaced apart from the coils.

9. The linear drive device as described in claim 8, characterized in that, The drive assembly further includes a first magnetic conductor disposed between the top plate and the plurality of coils, and a second magnetic conductor disposed between the corresponding mounting portion and the magnet; the first magnetic conductor has a plurality of protrusions that protrude toward the mover on the side near the bottom plate, and each coil is wound around one of the protrusions; the magnets include a plurality of magnets and are arranged at intervals on the second magnetic conductor.

10. The linear drive device as described in claim 9, characterized in that, The top plate is provided with a first recessed portion that is recessed away from the mover at the position corresponding to the first magnetic conductor, and the first magnetic conductor is disposed in the first recessed portion; the mounting portion of each mover is provided with a second recessed portion that is recessed away from the stator at the position corresponding to its second magnetic conductor, and the second magnetic conductor is disposed in the second recessed portion.

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