CN106981944B - Linear drive apparatus - Google Patents
Linear drive apparatus Download PDFInfo
- Publication number
- CN106981944B CN106981944B CN201710330126.9A CN201710330126A CN106981944B CN 106981944 B CN106981944 B CN 106981944B CN 201710330126 A CN201710330126 A CN 201710330126A CN 106981944 B CN106981944 B CN 106981944B
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- China
- Prior art keywords
- rotor
- bearing
- sliding block
- motor
- guide rail
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission Devices (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a kind of linear drive apparatus, including guide rail, driving motor, motor cover, sliding block, ball screw, latch segment, control system, long ball grooves are offered on the guide rail, the motor cover is fixedly mounted on the driving motor both ends, bearing hole is offered in the motor cover, the two ends of rotor passes through the bearing hole and the motor cover is rotatablely connected, the sliding block is arranged on the guide rail, and it is slidably connected with the guide rail, holding tank has been provided on the sliding block, ball screw is located in the holding tank, the latch segment is located at below the sliding block, and it is fixedly mounted on the slide block, shaft coupling is provided between the rotor and the ball screw, the both ends of the ball screw are successively arranged with ball-recirculation device respectively, pressure bearing, bearing baffle, the bearing baffle and the ball screw Rotation connection；Ultralong-stroke can be achieved in the present invention, while ensure that the high-precision of ball-screw.
Description
Technical field
The present invention relates to linear drives equipment, especially a kind of linear drive apparatus of suitable ultralong-stroke.
Background technique
Currently, for the generally ball screw, gear-rack drive, synchronous belt of straight-line displacement driving on existing lathe
Driving, trapezoidal screw driving.Ball screw precision height, durability equipment that is good, but may not apply to long stroke, it is same synchronous
Belt and trapezoidal screw are not available in the field of long stroke yet, and ultralong-stroke will cause screw rod or belt self weight is excessive, deformation
Amount is big, and vibration is big, and reciprocal positioning accuracy reduces.Rack pinion be suitble to ultralong-stroke application, rack gear can with unlimited lengthening,
But gear and rack gear engagement can have gap, and cause bigger gyration aperture using abrasion for a long time, precision is low.Therefore row
It needs to design one kind in the industry and is suitable for ultralong-stroke and linear drive apparatus with high accuracy, with overcome the deficiencies in the prior art.
Summary of the invention
Of the existing technology in order to solve the problems, such as, the present invention provides a kind of linear drives equipment.
To achieve the above object, the technical solution adopted by the present invention is that linear drive apparatus, comprising:
Guide rail offers long ball grooves；
Driving motor, including stator, rotor, the stator are slidably connected with the guide rail, and the rotor is set in described
In stator；
Motor cover is fixedly mounted on the driving motor both ends, and bearing hole, the rotor two are offered in the motor cover
End is rotatablely connected across the bearing hole and the motor cover；
Sliding block is arranged on the guide rail, and is slidably connected with the guide rail, has been provided with holding tank on the sliding block；
Ball screw is located in the holding tank；And
Latch segment is located at below the sliding block, and is fixedly mounted on the slide block；
Wherein, be provided with shaft coupling between the rotor and the ball screw, the both ends of the ball screw respectively according to
Secondary to be arranged with ball-recirculation device, pressure bearing, bearing baffle, the ball-recirculation device, pressure bearing, bearing baffle are respectively positioned on institute
It states in long ball grooves, the bearing baffle and the ball screw are rotatablely connected.
In one embodiment of the invention, rotor slot is offered on the stator, the section of the rotor slot is arc-shaped, institute
State that rotor is located at the rotor slot and the long ball grooves are formed by space.
In one embodiment of the invention, the motor cover includes first motor lid, the second motor cover, the first motor
Lid, the second motor cover are set in the two ends of rotor, and it is described fixed that the first motor lid, the second motor cover are respectively and fixedly installed to
The both ends of the surface of son.
In one embodiment of the invention, bearing block, the bearing block are equipped on the first motor lid, the second motor cover
In the long ball grooves of the guide rail, the bearing hole is provided on the bearing block, is provided with bearing in the bearing hole,
The bearing inner sleeve is equipped with the rotor.
In one embodiment of the invention, second motor cover includes end backup plate, connecting plate, the end backup plate and connecting plate
It is fixedly connected, the end backup plate is fixedly connected on an end face of the stator, an end face of the connecting plate and the sliding block
It is fixedly connected.
In one embodiment of the invention, the connecting plate is L-type connecting plate.L-type connecting plate is two, is symmetrically distributed in end
The two sides of backup plate, wherein vertically the part of corresponding L-type connecting plate is connected to a fixed L with the end backup plate.
In one embodiment of the invention, the both ends on the sliding block offer baffle plate groove, and the bearing baffle is located at described
In baffle plate groove, and it is fixedly connected with the sliding block.
In one embodiment of the invention, the guide rail is equipped with earflap, and the earflap is fixedly connected with the guide rail, described
Offer snap openings on sliding block, the height of the snap openings is less than or equal to the thickness of the earflap, the snap openings with it is described
Earflap matches, and the guide rail slides on the earflap.The latch segment is symmetrically mounted on the described of the two sides of the guide rail
Below sliding block.
In one embodiment of the invention, encoder is provided on the rotor, the encoder and rotor rotation connect
It connects, the encoder is fixedly mounted on the first motor and covers.
Further include control system in one embodiment of the invention, the driving motor, encoder with the control system
Electrical connection.
The technical program has the advantages that
The pressure bearing and bearing baffle for being set in ball screw both ends end enable ball screw to be steadily defined
In the holding tank of sliding block, i.e., ball screw can only be rotated inside sliding block and cannot be moved horizontally, and can be with the same time shift of sliding block
It is dynamic.Latch segment below sliding block is set for " pulling " sliding block and ball screw, so that sliding block is close to guide rail, in sliding block and rolling
Ball between ballscrew is avoided and gap rolling is occurred between ball with precompression.Meanwhile long ball is offered on guide rail
Slot, the long ball grooves are groove, and the stator, ball screw part are located in the groove, and can be rotated in the trench.Driving electricity
All together relatively with guide rail sliding motion, it is mobile that position occurs together with the sliding block for latch segment for machine, sliding block.It is offered on stator
Rotor slot, the rotor slot are that section is semicircle shape, and rotor is located at rotor slot and long ball grooves are formed by space.It is rotatable
Encoder for feeding back rotor rotational angle signal, feed back to control system for controlling the rotation of driving motor.
The present invention directly drives the ball screw inside sliding block by driving motor, and rotatable parts are short and small, and rotary inertia is small,
Guide rail can realize ultralong-stroke by docking simultaneously, ensure that the high-precision of ball-screw.
Detailed description of the invention
Fig. 1 is the explosive view of one embodiment of the invention；
Fig. 2 is the view at another visual angle of Fig. 1 explosive view of the invention；
Fig. 3 is the structural schematic diagram of one embodiment of the invention；
Fig. 4 is the cross-sectional view of one embodiment of the invention.
1, guide rail；2, driving motor；4, sliding block；7, long ball grooves；21, stator；22, rotor；
23, rotor slot；31, first motor lid；32, the second motor cover；33, bearing block；34, bearing hole；35, bearing；8,
Hold backup plate；9, L-type connecting plate；10, holding tank；11, ball screw；12, latch segment；13, shaft coupling；14, ball-recirculation device；
15, pressure bearing；16, bearing baffle；17, baffle plate groove；18, earflap；41, snap openings；20, encoder；1211, U-shaped circulator；
1222, ball grooves.
Specific embodiment
Below with reference to examples and drawings 1 to 4, the invention will be further described.
Linear drive apparatus according to the present invention, including guide rail 1, driving motor 2, motor cover, sliding block 4, ball screw
11, latch segment 12, control system.Long ball grooves 7 are offered on the guide rail 1, the long ball grooves 7 are semi-circular grooves, ditch
Threaded line is provided in slot.The driving motor 2 includes stator 21, rotor 22, and the stator 21 connects with the guide rail 1 sliding
It connects, the rotor 22 is set in the stator 21；Rotor slot 23 is offered on the stator 21, the rotor slot 23 is circular arc
Connected in star, the rotor 22 be located at the rotor slot 23 be formed by with the long ball grooves 7 in the space in and with stator 21 relatively
Rotation.
The both ends installation of the stator 21 is separately installed with first motor lid 31, the second motor cover 32, the first motor
Lid 31, the second motor cover 32 are respectively and fixedly installed in the both ends of the surface of the stator 21.The first motor lid 31, the second motor
It is equipped with bearing block 33 on lid 32, bearing hole 34, the first motor lid 31, the second motor have been provided on the bearing block 33
Lid 32 is set in the both ends of the rotor 22 by bearing hole 34 respectively, is provided with bearing 35 in bearing hole 34.It is installed to described
Bearing block 33 on stator 21 is located in the long ball grooves 7 of the guide rail 1.
Second motor cover 32 further includes end 8, two L-type connecting plates 9 of backup plate, described two L-type connecting plates 9 are symmetrical,
And the transverse direction of L is in be distributed in the two sides of the end backup plate 8 away from shape, be fixedly connected with the end backup plate 8, three is also possible to
It is made by way of integrated molding.Wherein the vertical corresponding part L-type connecting plate 9L is connected to a fixed with the end backup plate 8,
The end backup plate 8 is fixedly connected on an end face of the stator 21 by connectors such as screws, and the L of the L-type connecting plate 9 is horizontal
It is fixedly connected to corresponding part with an end face of the sliding block 4 by connectors such as screws.
The sliding block 4 is placed on the guide rail 1, is slidably connected with the guide rail 1, has been provided with appearance on the sliding block 4
Receive slot 10；The ball screw 11 is located in the holding tank 10 to be formed by space with the long ball grooves 7 of the guide rail 1.
Latch segment 12 is provided with below the sliding block 4, latch segment 12 includes U-shaped circulator 1211 and ball grooves 1222, U-shaped circulator
It is fixedly connected between 1211 and ball grooves 1222.The latch segment 12 is fixedly mounted on sliding block 4, for in holding tank 10
Ball is with certain precompression, the generation for avoiding gap from rolling.
It is attached between the rotor 22 and the ball screw 11 by shaft coupling 13, is directly driven by driving motor
Ball screw 5 inside movable slider 4, rotatable parts are short and small, and rotary inertia is small, and precision is high.Distinguish at the both ends of the ball screw 5
It is successively arranged with ball-recirculation device 14, pressure bearing 15, bearing baffle 16, the both ends on the sliding block 4 offer baffle plate groove 17,
The bearing baffle 16 is located in the baffle plate groove 17, is fixedly connected with the sliding block 4,16 sets of the bearing baffle and the rolling
Ballscrew 11 is rotatablely connected.
The guide rail 1 is equipped with earflap 18, and the earflap 18 is fixedly connected with the guide rail 1, is also possible to be integrally formed.
Snap openings 41 are offered on the sliding block 4, the height of the snap openings 41 is less than or equal to the thickness of the earflap 18, convenient for working as
The sliding block 4 when being placed on the guide rail 1 snap openings 41 matched with the earflap 18,41 two sidewalls of snap openings
It fits with the earflap 18, is further able to slide along earflap 18.At this point, both can guarantee that two sides were installed below sliding block 4
Latch segment 12, and the weight of entire sliding block 4 can be made minimum, vibration is reduced, precision is improved.The latch segment 12 is symmetrically pacified
Mounted in 4 lower section of sliding block being located at the 1 two sides earflap of guide rail, fixed form can be carried out by connectors such as screws, thus
So that sliding block 4 and ball screw is adjacent to guide rail, guarantees that ball has a precompression between them.
Be additionally provided with encoder 20 on the rotor 22, the encoder 20 be set on rotor 22 and with the rotor
22 rotation connections, the encoder 20 are fixedly connected on the first motor lid 31, and the driving motor 2, encoder 20 are equal
It is electrically connected with the control system, rotatable encoder 20 feeds back to control system for feeding back rotor rotational angle signal
For controlling the rotation of driving motor.
In the present embodiment, the stator that the stator 21 is equivalent to ordinary motor cuts away half, rotor or complete rotor,
The stator of half can drive the rotation of rotor 22 (driving method still as common stepper motor, using AC induction motor in the same old way
Principle or synchronous machine drives principle), while the rotary encoder of tail portion feeds back rotational angle signal.Route control is upper and general
Logical servo motor is just the same, does not need to change existing control.
The present invention designs the linear drive apparatus for being more suitable for ultralong-stroke, energy in precision by the structure of advantages of simple
Enough match in excellence or beauty ball-screw, while can infinitely dock again, realizes ultralong-stroke.
Above-mentioned specific embodiment is used only to illustrate the present invention, rather than is to limit the invention, in the present invention
Objective and scope of protection of the claims in, to any replacement and change not made the creative labor for making of the present invention,
Fall within the scope of protection of the patent of the present invention.
Claims (8)
1. a kind of linear drive apparatus characterized by comprising
Guide rail offers long ball grooves；
Driving motor, including stator, rotor, the stator are slidably connected with the guide rail, and the rotor is set in the stator
It is interior；
Motor cover is fixedly mounted on the driving motor both ends, bearing hole is offered in the motor cover, and the two ends of rotor is worn
It crosses the bearing hole and the motor cover is rotatablely connected；
Sliding block is arranged on the guide rail, and is slidably connected with the guide rail, has been provided with holding tank on the sliding block；
Ball screw is located in the holding tank；
And latch segment, it is located at below the sliding block, and be fixedly mounted on the slide block；
Wherein, shaft coupling is provided between the rotor and the ball screw, the both ends of the ball screw successively cover respectively
Equipped with ball-recirculation device, pressure bearing, bearing baffle, the ball-recirculation device, pressure bearing, bearing baffle are respectively positioned on the length
In ball grooves, the bearing baffle and the ball screw are rotatablely connected；
Both ends on the sliding block offer baffle plate groove, and the bearing baffle is located in the baffle plate groove, and solid with the sliding block
Fixed connection；
The guide rail is equipped with earflap, and the earflap is fixedly connected with the guide rail, and snap openings are offered on the sliding block, described
The height of snap openings is less than or equal to the thickness of the earflap, and the snap openings are matched with the earflap, and the sliding block is in institute
It states and is slided on earflap；The latch segment is symmetrically mounted below the sliding block at the earflap of guide rail two sides.
2. linear drive apparatus according to claim 1, which is characterized in that rotor slot is offered on the stator, it is described
The section of rotor slot be it is arc-shaped, the rotor is located at the rotor slot and the long ball grooves and is formed by space.
3. linear drive apparatus according to claim 1, which is characterized in that the motor cover includes first motor lid,
Two motor covers, the first motor lid, the second motor cover are set in the two ends of rotor, the first motor lid, the second motor
Lid is respectively and fixedly installed to the both ends of the surface of the stator.
4. linear drive apparatus according to claim 3, which is characterized in that on the first motor lid, the second motor cover
It is equipped with bearing block, in the long ball grooves of the guide rail, the bearing hole is provided on the bearing block bearing seat,
Bearing is provided in the bearing hole, the bearing inner sleeve is equipped with the rotor.
5. linear drive apparatus according to claim 4, which is characterized in that second motor cover includes end backup plate, connects
Fishplate bar, the end backup plate are fixedly connected with connecting plate, and the end backup plate is fixedly connected on an end face of the stator, the company
Fishplate bar is fixedly connected with an end face of the sliding block.
6. linear drive apparatus according to claim 5, which is characterized in that the connecting plate is L-type connecting plate.
7. linear drive apparatus according to claim 3, which is characterized in that encoder is provided on the rotor, it is described
Encoder and the rotor are rotatablely connected, and the encoder is fixedly mounted on the first motor and covers.
8. linear drive apparatus according to any one of claims 1 to 7, which is characterized in that it further include control system, the drive
Dynamic motor, encoder are electrically connected with the control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710330126.9A CN106981944B (en) | 2017-05-11 | 2017-05-11 | Linear drive apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710330126.9A CN106981944B (en) | 2017-05-11 | 2017-05-11 | Linear drive apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106981944A CN106981944A (en) | 2017-07-25 |
| CN106981944B true CN106981944B (en) | 2019-08-06 |
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ID=59343359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710330126.9A Active CN106981944B (en) | 2017-05-11 | 2017-05-11 | Linear drive apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106981944B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869539A (en) * | 2018-08-23 | 2018-11-23 | 深圳供电局有限公司 | Slide rail assembly for high-voltage-grade cable line processing device |
| CN110567358B (en) * | 2019-08-26 | 2021-03-09 | 中国美术学院 | Method and device for measuring diameter by double-acting cantilever beam sensor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003230251A (en) * | 2002-01-31 | 2003-08-15 | Nsk Ltd | Uniaxial actuator |
| JP5024877B2 (en) * | 2007-11-05 | 2012-09-12 | トヨタ自動車株式会社 | Fatigue test linear actuator |
| JP5417190B2 (en) * | 2009-06-19 | 2014-02-12 | 黒田精工株式会社 | Linear motion device |
| CN205173394U (en) * | 2015-11-03 | 2016-04-20 | 深圳市福士工业科技有限公司 | Long stroke screw mechanism |
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2017
- 2017-05-11 CN CN201710330126.9A patent/CN106981944B/en active Active
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| Publication number | Publication date |
|---|---|
| CN106981944A (en) | 2017-07-25 |
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