CN109831058A - A kind of displacement actuator - Google Patents
A kind of displacement actuator Download PDFInfo
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- CN109831058A CN109831058A CN201910082933.2A CN201910082933A CN109831058A CN 109831058 A CN109831058 A CN 109831058A CN 201910082933 A CN201910082933 A CN 201910082933A CN 109831058 A CN109831058 A CN 109831058A
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Abstract
The present invention provides a kind of displacement actuator, it includes linear bearing component, ball-screw component, harmonic reduction device assembly and electric machine assembly, the power intake of harmonic reduction device assembly connects electric machine assembly, the power output of harmonic reduction device assembly terminates ball-screw component one end, ball-screw component will be for that will be converted into translation, the ball-screw component other end is connect with linear bearing component, and ball-screw component drives the translation of linear bearing component flexible；The shaft of ball-screw component, harmonic reduction device assembly and electric machine assembly three is coaxial；The axial line of linear bearing component and shaft are coaxial.Compared with prior art the beneficial effects of the present invention are: concentricity installation error between driving device and guiding device can be eliminated by means of the connection of linear bearing component, ball-screw component, harmonic reduction device assembly and electric machine assembly and concentricity transmitting, realize the Bit andits control of the big stroke of high-precision High Linear.
Description
Technical field
The present invention relates to precision instrument technical field more particularly to a kind of displacement actuators.
Background technique
Displacement actuator is by the product of motor cooperation lead screw integrated design, and displacement actuator can be realized motor
Rotary motion is converted into the function of linear motion.In addition, displacement actuator also passes through the rotation that encoder is accurately controlled motor,
To the position of accurate control output end.
Common piezo-electric type displacement actuator has good stability, fast response time, positioning accuracy height and driving force etc. special
Point, but it there is also shortcoming, major defect is:
1, driving trip is small；
2, easily occur sluggish；
3, the reverse backlash generated influences control precision, and it is reverse flat that reverse backlash refers to that displacement actuator is translated towards in forward direction
Due to rotating the introduced gap error of backlash in the conversion process of shifting；
4, output nonlinear；
5, drive shaft and transmission shaft coaxiality error are larger etc..
With the gradually development of technology, a kind of big stroke, high-precision are not still provided in the prior art, without reverse backlash
Displacement actuator.
Summary of the invention
In view of this, in order to solve the problems, such as low precision present in displacement actuator in the prior art, the present invention is mentioned
For a kind of displacement actuator comprising linear bearing component, ball-screw component, harmonic reduction device assembly and electric machine assembly, institute
The power intake for stating harmonic reduction device assembly connects the electric machine assembly, the power output termination of the harmonic reduction device assembly
Ball-screw component one end, for the ball-screw component for that will be converted into translation, the ball-screw component is another
One end is connect with the linear bearing component, and the ball-screw component drives the linear bearing component translation flexible；It is described
The shaft of ball-screw component, the harmonic reduction device assembly and the electric machine assembly three is coaxial；The linear bearing component
Axial line and the shaft it is coaxial.
Preferably, the ball-screw component includes lead screw mounting base, ball-screw and ball-screw nut, the ball
Feed screw nut supports the lead screw mounting base, and the lead screw mounting base is for driving the linear bearing component, the ball wire
Through being arranged inside the ball-screw nut, the ball-screw and the harmonic reduction device assembly are sequentially connected thick stick.
Preferably, the displacement actuator further includes pretension elastic component, the pretension elastic component and the lead screw mounting base
Compress connection.
Preferably, the pretension elastic component is spring, the spring one is against the lead screw mounting base；The spring is another
The linear bearing seat on the linear bearing component is held, the pretightning force of the spring is applied in the lead screw mounting base.
Preferably, the harmonic reduction device assembly includes harmonic speed reducer attachment base, harmonic speed reducer, harmonic speed reducer bottom
Seat and centered cylinder；Harmonic speed reducer attachment base one end is connect with the ball-screw component, the other end and the harmonic wave
Retarder connection；The harmonic speed reducer is also connect with the harmonic speed reducer pedestal；The centered cylinder subtracts with the harmonic wave
Fast device connection.
Preferably, the harmonic speed reducer includes firm gear and flexbile gear；The firm gear passes through seam allowance and the harmonic speed reducer
Pedestal connects with one heart, and the flexbile gear is connect with the harmonic speed reducer attachment base.
Preferably, the electric machine assembly includes linear motor and flexible clutch, described flexible clutch one end is connected to
On the output shaft of the linear motor, the other end is connect with the harmonic reduction device assembly.
Preferably, the linear bearing component includes linear bearing bar and linear bearing seat, the linear bearing seat is by institute
The movement for stating linear bearing bar is limited to flexible up and down, the linear bearing bar connection ball-screw component.
Preferably, the displacement actuator further includes bulb support component, the bulb support component include supporting pad and
Ball rod, bulb one end on the ball rod are matched with the ball-and-socket on the supporting pad, the other end of the ball rod and straight
The connection of line bearing rod.
Compared with the prior art the beneficial effects of the present invention are:
By means of the connection of linear bearing component, ball-screw component, harmonic reduction device assembly and electric machine assembly and same
The transmitting of axis degree can eliminate concentricity installation error between driving device and guiding device, realize high-precision, High Linear and
The Bit andits control of big stroke.
Detailed description of the invention
Fig. 1 is the assembling structure schematic diagram for the displacement actuator that the embodiment of the present invention one provides；
Fig. 2 is the central cross-sectional view for the bulb support component that the embodiment of the present invention one provides；
Fig. 3 is the central cross-sectional view for the linear bearing component that the embodiment of the present invention one provides；
Fig. 4 is the central cross-sectional view for the ball-screw component that the embodiment of the present invention one provides；
Fig. 5 is the central cross-sectional view for the electric machine assembly that the embodiment of the present invention one provides；
Fig. 6 is the central cross-sectional view for the harmonic reduction device assembly that the embodiment of the present invention one provides.
Appended drawing reference:
1, bulb support component；2, linear bearing component；3, ball-screw component；4, harmonic reduction device assembly；5, motor
Component；6, outer housing；11, supporting pad；12, ball rod；21, linear bearing bar；22, linear bearing seat；23, spring；31, lead screw
Mounting base；32, ball-screw；33, ball-screw nut；41, harmonic speed reducer attachment base；42, harmonic speed reducer；43, corner connection
Touch ball bearing；44, harmonic speed reducer pedestal；45, centered cylinder；51, motor mount；52, flexible clutch；53, straight-line electric
Machine.
Specific embodiment
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship, be merely for convenience of description the present invention, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, unless otherwise clear
It is specific to limit.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate each other；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly.For this field
For those of ordinary skill, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is purged, is complete
Whole description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment one
The embodiment of the present invention one provides a kind of displacement actuator comprising guiding mechanism, transmission device, retarder and rotation
Driving device, the input terminal of the retarder connect the device of rotation driving, and the output of the retarder terminates the transmission
Device one end, the transmission device connect for that will be converted into translation, the transmission device other end and the guiding mechanism
It connects, the guiding mechanism is linear guiding mechanism, and the transmission device drives the guiding mechanism translation flexible.
Preferably, guiding mechanism is linear bearing component 2, and transmission device is ball-screw component 3, retarder is that harmonic wave subtracts
Fast device assembly 4, device of rotation driving are electric machine assembly 5.
Fig. 1 is the assembling structure schematic diagram for the displacement actuator that the embodiment of the present invention one provides.As shown in Figure 1, of the invention
Embodiment one provides a kind of displacement actuator, including bulb support component 1, linear bearing component 2, ball-screw component 3, harmonic wave
Reducer assemblies 4, electric machine assembly 5 and outer housing 6, wherein linear bearing component 2 is mounted on 1 lower part of bulb support component, is used to
Guide frame as displacement actuator；And connecting plate is then mounted on 2 lower part of linear bearing component, for being carried out with external structure
Transition connection；Outer housing 6 is integrally-built fixed frame；It is used with the ball-screw component 3 that linear bearing component 2 is cooperatively connected
In realizing jacking and decline process, ball-screw component 3 is a kind of transmission mechanism, converts translation for rotation, is entire
The displacement actuating structure of displacement actuator；Harmonic reduction device assembly 4 is installed to ball-screw component bottom, harmonic reduction device assembly
4 are located at 6 lower part of outer housing.Harmonic reduction device assembly 4 is used to slow down the movement for the motor for being mounted on its bottom, to be promoted
Torque and lifting precision.The electric machine assembly 5 for being installed to bottommost is responsible for providing power, and electric machine assembly 5 is entire displacement actuator
Power output structure.Outer housing 6 is located at the outer circle of linear bearing component 2, ball-screw component 3 and harmonic wave reducer assemblies 4
Week, while the bottom of outer housing 6 is then realized with electric machine assembly 5 and is connected.
Fig. 2 is the central cross-sectional view for the bulb support component that the embodiment of the present invention one provides.As shown in Figure 2, wherein bulb
Support component 1 is the realization terminal of final straight-line displacement.The centre rotational axis for defining entire displacement actuator is Z axis, bulb branch
The high-precision linearly operating that support component 1 can be jacked and be declined in Z-direction moves.Further, it is assumed that the forward direction side of Z axis
To for straight up, X-axis and Y-axis are arranged in the horizontal plane, and X-axis and Y-axis are vertical with Z axis respectively, and X-axis and Y-axis are also hung down mutually
Directly.
Bulb support component 1 include positioned at entire displacement actuator top supporting pad 11 and with the matched ball of supporting pad 11
Head rod 12.Supporting pad 11 is equipped with ball-and-socket, and ball-and-socket is used cooperatively with the bulb on ball rod 12, and bulb is inserted into ball-and-socket, branch
Stake pad 11 and ball rod 12 are cooperated by ball-and-socket is entirely limited the translation freedoms of ball rod 12 extremely, i.e., in this way being capable of limiting ball
Displacement along X-axis and Y direction occurs for head and supporting pad 11.But supporting pad 11 and ball rod 12 are cooperated by ball-and-socket by ball simultaneously
The rotary freedom of head rod 12 is decontroled completely.In this way, it is free to secure translation of the bulb support component 1 under three coordinate systems
Degree, while bulb support component 1 also releases the rotary freedom of three coordinate systems.
Beneficial effect using the bulb support component 1 is: can guarantee finally implementing displacement movement in this way
11 position of supporting pad it is motionless in the case where, ball rod 12 can be rotated freely around the center point at center, be also ensured final
It is displaced adaptability.Self centering may be implemented in bulb support component 1, prevents mounting plane and linear bearing component 2 when because of installation
Central symmetry axis be not overlapped and introduce heeling error.
Fig. 3 is the central cross-sectional view for the linear bearing component that the embodiment of the present invention one provides.As shown in figure 3, linear bearing
Component 2 is the guiding mechanism of displacement actuator.Linear bearing component 2 includes linear bearing bar 21 and linear bearing seat 22.Straight line
Bearing rod 21 can be used in for completing to connect with bulb support component 1.Linear bearing seat 22 is arranged outside linear bearing bar 21
It face and is matched with linear bearing bar 21.Linear bearing bar 21 can be free to slide along Z-direction.
It further includes pretension elastic component that the embodiment of the present invention one, which provides a kind of displacement actuator, and pretension elastic component is preferably spring
23, spring 23 is arranged outside linear bearing seat 22.Spring 23 can be used in eliminating reverse backlash.
The linear bearing bar 21 cooperates linear bearing seat 22 to be used in conjunction with, and steel ball of the linear bearing seat 22 inside will
The rotary freedom of linear bearing bar 21 is entirely limited, and steel ball of the linear bearing seat 22 inside will also be by linear bearing bar 21
Translation freedoms in X-axis and Y direction are entirely limited extremely.Linear bearing bar 21 can occur inside linear bearing seat 22
Along freely moving up and down for Z-direction, and the run-out error of linear bearing bar 21 is less than 0.02mm, and spring 23 is installed to
The outside of linear bearing seat 22, and upper end is pressed against the upper overturning bottom of linear bearing seat 22.
Linear bearing component 2 is mounted on 1 lower part of bulb support component, is connected through a screw thread and realizes ball rod 12 and linear axis
Hold the connection of bar 21.Linear bearing component 2 carrys out limiting ball by means of the cooperation between linear bearing bar 21 and linear bearing seat 22
Translation error of the head support component 1 in lifting process in X-axis and Y direction, guarantees 1 generation Z-direction of bulb support component
Movement.
Fig. 4 is the central cross-sectional view for the ball-screw component that the embodiment of the present invention one provides.As shown in figure 4, the ball
Lead screw assembly 3 is arranged in the lower part of linear bearing component 2, and ball-screw component 3 is for realizing jacking and decline process, i.e. ball
Lead screw assembly 3 is able to drive linear bearing component 2 and executes jacking and decline.
Ball-screw component 3 includes lead screw mounting base 31, ball-screw nut 33 and ball-screw 32.Lead screw mounting base 31
It is connected to 21 bottom of linear bearing bar.Ball-screw nut 33 is arranged in 31 bottom of lead screw mounting base.The setting of ball-screw 32 exists
Inside ball-screw nut 33.33 script of ball-screw nut can be freely rotated in 32 outer circle of ball-screw, but by
Connection has been completed with linear bearing component 2 in ball-screw nut 33, therefore cannot achieve rotation, and then become from rotation
Freely up and down moving in Z-direction, ball-screw component 3 realize the function of converting rotary motion to linear motion.
There are reverse backlash for ball-screw, can eliminate reverse backlash by means of the pretightning force that spring 23 applies.Ball wire
The specific assembling process of thick stick component 3 is that ball-screw nut 33 is installed to outside ball-screw 32 first, then installs lead screw
Seat 31 is inserted in ball-screw 32 from top.
Ball-screw component 3 is mounted on the lower part of linear bearing component 2, it is preferable that by screw by lead screw mounting base 31
It is fixed together with linear bearing bar 21.Ball-screw component 3 is used to implement the high-precision linearly operating of displacement actuator.
The working principle of ball-screw component 3 is to drive ball-screw nut 33 to transport by controlling the rotation of ball-screw 32
It is dynamic.The ball that screw thread in ball-screw 32 will push in ball-screw nut 33 is circulated.Further, due to ball
The rotary freedom of feed screw nut 33 is limited, translational motion of the meeting of ball-screw nut 33 in Z-direction.
Ball-screw nut 33 is threadedly engaged along ball-screw 32 there are certain gap, is embodied in rotation direction
When change, certain delay can be generated, is generally called reverse backlash, is i.e. ball-screw 32 inverts, but ball-screw spiral shell
, only there is the reversion of thread pitch in the displacement that mother 33 does not respond to but.In order to eliminate reverse backlash, in linear bearing group
A kind of elastic preload piece is devised in part 2, elastic preload piece is preferably spring 23, and the beneficial effect of setting spring 23 is: benefit
With position control by 23 pressure stretch of spring to certain length, the pretightning force of this partial spring is applied in lead screw mounting base 31, and power passes
It is delivered on the ball-screw nut 33 for being connected to lead screw mounting base 31, by means of the pressure stretch of ball-screw nut 33, guarantees nut
The state for being zero in lower gap eliminates reverse backlash whereby.
Fig. 6 is the central cross-sectional view for the harmonic reduction device assembly that the embodiment of the present invention one provides.As shown in fig. 6, described humorous
Wave reducer assemblies 4 are installed to the lower part of ball-screw component 3, and harmonic reduction device assembly 4 is for realizing revolving speed deceleration, i.e.,
When harmonic reduction device assembly 4 can will input the rotation output being converted into relative to low angular speed relative to the rotation of high angular velocity.?
In the present embodiment one, the power intake of harmonic reduction device assembly 4 connects electric machine assembly 5.Harmonic reduction device assembly 4 can will be straight
The angular speed of line motor 53 is converted into the rotational angular velocity of ball-screw 32.Harmonic reduction device assembly 4 connects including harmonic speed reducer
Joint chair 41, harmonic speed reducer 42, angular contact ball bearing 43, harmonic speed reducer pedestal 44 and centered cylinder 45.Harmonic speed reducer connects
The bottom of ball-screw 32 is arranged in joint chair 41, and harmonic speed reducer attachment base 41 and ball-screw 32 complete connection, harmonic reduction
The rotation of motor is passed up to ball-screw 32 by device assembly 4.Harmonic speed reducer 42 is arranged in harmonic speed reducer attachment base 41
And between harmonic speed reducer pedestal 44, it is furthermore appreciated that being arranged for harmonic speed reducer 42 at 41 bottom of harmonic speed reducer attachment base
Portion, harmonic speed reducer pedestal 44 are arranged in 42 bottom of harmonic speed reducer.Angular contact ball bearing 43 is arranged in harmonic speed reducer pedestal
44 center.Centered cylinder 45 accesses inside harmonic speed reducer 42.Centered cylinder 45 also extends through harmonic speed reducer pedestal 44, center
Cylinder 45 is also connect with electric machine assembly 5.
Harmonic speed reducer 42 includes firm gear, flexbile gear and intermediate bearing.Firm gear is fixed on harmonic speed reducer pedestal 44, is led to
It crosses seam allowance and realizes that installation, flexbile gear are then mounted on harmonic speed reducer attachment base 41 the two with one heart, the jackshaft between firm gear and flexbile gear
It holds, and centered cylinder 45 is cooperated.The high-speed motion of centered cylinder 45 is converted into harmonic reduction using harmonic speed reducer 42
The low-speed motion of device attachment base 41.
The fixation procedure of harmonic reduction device assembly 4 are as follows: angular contact ball bearing 43 is packed into harmonic speed reducer pedestal 44 first
Centered cylinder 45 is then packed into inside angular contact ball bearing 43 by inner hole, and 42 inner hole of harmonic speed reducer is then packed into center circle
Column 45, and the flexbile gear on 42 top of harmonic speed reducer and harmonic speed reducer attachment base 41 are realized into connection, then, by harmonic speed reducer
Pedestal 44 is installed under the firm gear of 42 bottom of harmonic speed reducer, whereby, to complete to subtract the fixation of harmonic speed reducer 42 and harmonic wave
The combination of fast device assembly 4.Beneficial effect using harmonic speed reducer 42 is: harmonic speed reducer 42 is compact-sized, and is able to achieve
Biggish reduction ratio.
Fig. 5 is the central cross-sectional view for the electric machine assembly that the embodiment of the present invention one provides.As shown in figure 5, driving device is electricity
Thermomechanical components 5, electric machine assembly 5 are preferably mounted at the bottommost of displacement actuator.Electric machine assembly 5 is responsible for providing power, is entire position
The driving mechanism of displacement actuator.Electric machine assembly 5 includes motor mount 51, linear motor 53 and flexible clutch 52.Motor peace
Dress seat 51 is connect with harmonic speed reducer pedestal 44, it is preferable that is connected by screw between the two.Linear motor 53 is arranged in motor
51 bottom of mounting base.52 one end of flexible clutch is connected on 53 output shaft of linear motor, and the other end of flexible clutch 52 connects
The centered cylinder 45 in harmonic reduction component is connect, whereby, electric machine assembly 5 can be completed to input to the power of harmonic speed reducer 4.
Electric machine assembly 5 then realizes the connection of linear motor 53 and centered cylinder 45 by flexible clutch 52, uses flexibility
Shaft coupling 52 realizes that the beneficial effect of the connection of linear motor 53 and centered cylinder 45 is: flexible clutch 52 has certain
Flexibility can eliminate the eccentric error between the rotary shaft of linear motor 53 and the rotary shaft of centered cylinder 45.
In order to realize high-precision Bit andits control, the technical solution in the embodiment of the present invention one will consider that setting-up eccentricity misses
Difference, the i.e. eccentric error of linear bearing component 2 and harmonic wave reducer assemblies 4.Eccentric error may introduce biggish frictional force and
Trueness error, therefore such defect should be overcome.The method transmitted in the present invention by using seam allowance, i.e., by a series of
Coaxial control, realizes the coaxial control of linear bearing component 2 and harmonic wave reducer assemblies 4.
By means of linear bearing component 2, ball-screw component 3, harmonic reduction device assembly 4 and electric machine assembly 5 these structures
Mutual cooperation and concentricity transmitting can eliminate concentricity installation error between driving device and guiding device, realize
The Bit andits control of the big stroke of high-precision High Linear.In addition, reverse backlash can be eliminated by means of spring pre-tightening, control is further increased
Precision processed.Structure of the invention is compact, has higher applicability, can easily realize the high precision position movement of micron dimension
It is dynamic.
Embodiment two
The present embodiment and one difference of embodiment are as follows:
Can there is no outer housing 6 in the present embodiment, alternative scheme is that linear bearing seat 22 is connected to a certain fixing end
On, linear bearing seat 22 is opposing stationary in harmonic reduction device assembly 4.This displacement actuator is still able to carry out work in this way.
Embodiment described above, the only specific embodiment of the invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent repair
Change, replace and improve etc., these modifications, replacement and improvement should be covered by the protection scope of the present invention.Therefore, this hair
Bright protection scope should be subject to the protection scope in claims.
Claims (9)
1. a kind of displacement actuator, which is characterized in that including linear bearing component (2), ball-screw component (3), harmonic reduction
The power intake of device assembly (4) and electric machine assembly (5), the harmonic reduction device assembly (4) connects the electric machine assembly (5),
The power output of the harmonic reduction device assembly (4) terminates described ball-screw component (3) one end, the ball-screw component
(3) for that will be converted into translation, ball-screw component (3) other end is connect with the linear bearing component (2), institute
Stating ball-screw component (3) drives linear bearing component (2) translation flexible；The ball-screw component (3), the harmonic wave
The shaft of reducer assemblies (4) and the electric machine assembly (5) three are coaxial；The axial line of the linear bearing component (2) and institute
It is coaxial to state shaft.
2. displacement actuator as described in claim 1, which is characterized in that the ball-screw component (3) includes lead screw installation
Seat (31), ball-screw (32) and ball-screw nut (33), the ball-screw nut (33) support the lead screw mounting base
(31), for driving the linear bearing component (2), the ball-screw (32) exists the lead screw mounting base (31) through setting
The ball-screw nut (33) is internal, and the ball-screw (32) and the harmonic reduction device assembly (4) are sequentially connected.
3. displacement actuator as claimed in claim 2, which is characterized in that the displacement actuator further includes pretension elastic component,
The pretension elastic component and the lead screw mounting base (31), which compress, to be connected.
4. displacement actuator as claimed in claim 3, which is characterized in that the pretension elastic component is spring (23), the bullet
Spring (23) one end is against the lead screw mounting base (31)；Spring (23) other end is on the linear bearing component (2)
Linear bearing seat (22), the pretightning force of the spring (23) is applied on the lead screw mounting base (31).
5. displacement actuator as described in claim 1, which is characterized in that the harmonic reduction device assembly (4) includes that harmonic wave subtracts
Fast device attachment base (41), harmonic speed reducer (42), harmonic speed reducer pedestal (43) and centered cylinder (45)；The harmonic speed reducer
Attachment base (41) one end is connect with the ball-screw component (3), and the other end is connect with the harmonic speed reducer (42)；It is described humorous
Wave retarder (42) is also connect with the harmonic speed reducer pedestal (43)；The centered cylinder (45) and the harmonic speed reducer
(42) it connects.
6. displacement actuator as claimed in claim 5, which is characterized in that the harmonic speed reducer (42) includes firm gear and soft
Wheel；The firm gear by seam allowance with the harmonic speed reducer pedestal (43) is concentric connect, the flexbile gear and the harmonic speed reducer
Attachment base (41) connection.
7. displacement actuator as described in claim 1, which is characterized in that the electric machine assembly (5) includes linear motor (53)
With flexible clutch (52), described flexible clutch (52) one end is connected on the output shaft of the linear motor (53), another
End is connect with the harmonic reduction device assembly (4).
8. such as the described in any item displacement actuators of claim 1-7, which is characterized in that the linear bearing component (2) includes
Linear bearing bar (21) and linear bearing seat (22), the linear bearing seat (22) limit the movement of the linear bearing bar (21)
It is made as flexible up and down, linear bearing bar (21) connection ball-screw component (3).
9. displacement actuator as claimed in claim 8, which is characterized in that the displacement actuator further includes bulb support component
(1), the bulb support component (1) includes supporting pad (11) and ball rod (12), bulb one end on the ball rod (12)
It is matched with the ball-and-socket on the supporting pad (11), the other end of the ball rod (12) is connect with the linear bearing bar (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910082933.2A CN109831058B (en) | 2019-01-24 | 2019-01-24 | Displacement actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910082933.2A CN109831058B (en) | 2019-01-24 | 2019-01-24 | Displacement actuator |
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| CN109831058A true CN109831058A (en) | 2019-05-31 |
| CN109831058B CN109831058B (en) | 2020-08-21 |
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| CN201910082933.2A Active CN109831058B (en) | 2019-01-24 | 2019-01-24 | Displacement actuator |
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