CN109185251A - Screw thread inserting type rotation with planet-gear speed reducer is straight to drive electrohydraulic servo valve - Google Patents
Screw thread inserting type rotation with planet-gear speed reducer is straight to drive electrohydraulic servo valve Download PDFInfo
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- CN109185251A CN109185251A CN201811206773.XA CN201811206773A CN109185251A CN 109185251 A CN109185251 A CN 109185251A CN 201811206773 A CN201811206773 A CN 201811206773A CN 109185251 A CN109185251 A CN 109185251A
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- speed reducer
- gear speed
- screw thread
- end cover
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 49
- 230000000712 assembly Effects 0.000 claims description 40
- 238000000429 assembly Methods 0.000 claims description 40
- 238000005192 partition Methods 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Retarders (AREA)
Abstract
The present invention provides the straight drive electrohydraulic servo valves of screw thread inserting type rotation with planet-gear speed reducer, reduce the starting torque requirement of servo motor, to enhance the adaptability that servo motor externally loads variation.It includes direct current brushless servo motor, valve component, planet-gear speed reducer, and the output end of the direct current brushless servo motor connects the input terminal of the planet-gear speed reducer, and the output end of the planet-gear speed reducer connects the spool of the valve component.
Description
Technical field
The present invention relates to the technical fields of electrohydraulic servo valve, and the screw thread inserting type rotation specially with planet-gear speed reducer is straight
Drive electrohydraulic servo valve.
Background technique
Key element of the electrohydraulic servo valve as electrohydraulic servo-controlling system, it is both electro-hydraulic converting element and power
Amplifier element, it connects electric part and hydraulic part, realizes the conversion and amplification of electro-hydraulic signal, performance is very big
The performance of entire electrohydraulic servo-controlling system is determined in degree, the feature high with its precision, response is fast is widely used in machine
The fields such as tool, automobile, ship, Aeronautics and Astronautics and robot.
Currently, widening with electrohydraulic servo system application field, the application of robot also mentions electrohydraulic servo valve
Gone out higher requirement: high frequency sound, high reliability, contamination resistance are strong, structure is simple, small in size, working service is convenient, it is low at
And this is convenient for integrated etc., and traditional electrohydraulic servo valve has been difficult to reach above-mentioned requirements again, existing market mainstream it is miniature electro-hydraulic
Servo valve product is 30 series of Moog, E024 is serial and 242 etc. do not design miniature screw thread plugged electric hydraulic servo, and
The inner elastomeric element of electrohydraulic servo valve makes its service life not be able to satisfy the application of robot at present, and most micro-
The electro-hydraulic electrohydraulic servo valve product of type is not all sold towards China, therefore is badly in need of a volume of independent development in robot field
Electrohydraulic servo valve small, light-weight, convenient for the extremely reliable high frequency sound of integrated and service life, especially screw thread inserting type rotate
It is straight to drive electrohydraulic servo valve.And DC servo motor rotates in the straight application field for driving electrohydraulic servo valve in screw thread inserting type and requires it
Has the function of the frequent start-stop of low-angle, this also belongs to application of the DC servo motor in the servomechanism of frequent start-stop, then
It is required that DC servo motor starting torque is big, therefore cause DC servo motor structure size bigger than normal.
Summary of the invention
In view of the above-mentioned problems, the present invention provides the straight drive electro-hydraulic servos of screw thread inserting type rotation with planet-gear speed reducer
Valve reduces the starting torque requirement of servo motor, to enhance the adaptability that servo motor externally loads variation；Reduce servo
Motor zero-bit due to caused by mechanical property shake, to enhance electrohydraulic servo valve in the stability of zero-bit；Pass through proper extension
The time of servo motor frequent start-stop, to enhance servo motor in the controllability of zero-bit attachment；Planet-gear speed reducer is by making
With two pairs of planet wheel sets, to reduce the zero-bit position error as caused by gear backlash.
Screw thread inserting type rotation with planet-gear speed reducer is straight to drive electrohydraulic servo valve, it is characterised in that: it include direct current without
Brush servo motor, valve component, planet-gear speed reducer, the output end of the direct current brushless servo motor connect the planetary gear and subtract
The input terminal of fast machine, the output end of the planet-gear speed reducer connect the spool of the valve component.
It is further characterized by:
The valve component includes spool, valve pocket, upper end cap assemblies, lower end cap assemblies, and the planet-gear speed reducer is also
It include upper end cover, body, planet carrier, planet axis, centre tooth, partition, the upper end cover is close to the brush DC servo electricity
The output side body of machine arranges that the space inner ring between the partition and the planet carrier is furnished with several planet axis, each described
Corresponding planetary gear is set in planet axis, the output shaft inserting of the direct current brushless servo motor enters the planetary gear and slows down
Machine it is central axial interior intracavitary, the part positioned at the central axial inner cavity of the output shaft is installed with centre tooth, it is described in
Heart tooth engagement connects the planetary gear of each ring cloth, and the valve component of the planet carrier close to lower section is arranged, the row
The convex part of the central axial central axis for being connected with spool of carrier, the body envelope the centre wheel, planet carrier, row
Star axis arrangement, the axial ends of the body are close to the radial outside upper surface of the lower end surface of the upper end cover, upper end cap assemblies
Arrangement；The outer circumferential surface of the upper end cap assemblies is equipped with external screw thread, and the external screw thread with the installation of integrated valve block for connecting；
The direct current brushless servo motor is located at axial one end arrangement of the planet-gear speed reducer, the valve component position
It is arranged in the axial other end of planet-gear speed reducer, ensures that total axial direction upper volume is small；
The axial region that the output shaft of the direct current brushless servo motor corresponds to the central axial inner cavity passes through first
Sleeve is axially divided, and upper centre tooth, lower centre tooth pass through the corresponding region that flat key is set in the output shaft respectively, described in every
The axial height position corresponding to the first sleeve of planet axis is set with second sleeve, covers respectively in the every planet axis
Equipped with upper planet tooth, lower planet tooth, the upper planet tooth engagement connects the upper centre tooth, and the lower planet tooth engagement connects institute
State lower centre tooth；
The first sleeve, second sleeve are integrally formed integrated sleeve, it is ensured that easy installation and reliable；
The upper centre tooth, lower centre tooth are identical structure gear, and the upper planet tooth, lower planet tooth are identical structure tooth
Wheel ensures to make simple, quick；
The body includes upper machine body, lower body, and the lower end surface cloth of the upper end cover is close in the upper surface of the upper machine body
It sets, the upper surface setting of the lower body, the bonding position of the upper machine body, lower body are close in the lower end surface of the upper machine body
Annular inner portion is recessed sleeve axial direction locating slot, it is ensured that the axially position of sleeve is installed, and the lower end surface of the lower body is close to
The radial outside upper surface of the upper end cap assemblies is arranged；
The convex part of the spool is specially Step Shaft, and the Step Shaft is inserted in the planet carrier admittedly by flat key
Heart delivery outlet；
The valve pocket it is interior it is intracavitary be disposed with the spool, the upper end cover of the valve pocket is equipped with the upper end cap assemblies,
The lower end cover of the valve pocket is equipped with the lower end cap assemblies；
The lower end of the spool is provided with flat recess structure, debugging convenient for assembly；
The upper end cap assemblies specifically include upper end cover, tabletting, upper end cover lower sheeting on upper end cover, and the upper end cover is corresponding
The first concave hole is provided with below the planet carrier of the planet-gear speed reducer, sheeting nip is coupled on the upper end cover
In in first concave hole, the lower surface of tabletting is bonded the bottom face arrangement of first concave hole, institute on the upper end cover
The convex corresponding position lower end surface for being mounted on the planet carrier in upper surface central area of tabletting on upper end cover is stated, it is described to state upper end
The upper surface central area for covering tabletting is convex for wear-resistant material, and the center of the lower surface of the upper end cover is recessed the
Two concave holes, the upper end cover lower sheeting interference fit are installed on second concave hole, the upper table of the upper end cover lower sheeting
The upper surface arrangement of second concave hole is close in face, and tabletting, upper end cover, upper end cover lower sheeting on upper end cover are connected shape by screw
At the upper end cap assemblies, the center of the upper end cap assemblies is run through in the convex part of the central axis of spool；
The correspondence upper surface for being fastenedly connected upper end cap assemblies, valve pocket of first fastening screw, it is ensured that easy to assembly reliable；
The part that tabletting corresponds to the central axis on the upper end cover is provided with stepped hole, is disposed in the stepped hole
Glais ring；
The lower end cap assemblies include lower cover, lower cover pressing plate, and the lower cover pressing plate is provided centrally with a center
Circular hole, there are two oil return holes for the circumferencial direction setting of the center hole, and screw will be under lower cover, the affixed formation of lower cover pressing plate
The centre bore of end-cap assembly, the lower cover pressing plate center hole and lower cover is coaxially arranged, the oil return of the lower cover pressing plate
The channel the arc-shaped T alignment in hole and lower cover；
Second fastening screw is fastenedly connected the correspondence lower end surface of the lower end cap assemblies, valve pocket, it is ensured that easy to assembly reliable.
After applying the present invention, the straight structure driven electrohydraulic servo valve and add planet-gear speed reducer is rotated with screw thread inserting type, inherited
Screw thread inserting type rotation straight the advantages of driving electrohydraulic servo valve, and overcome what servo motor was highlighted in zero-location control
Disadvantage；The straight electro-hydraulic conversion for driving electrohydraulic servo valve is rotated as screw thread inserting type using DC servo motor plus planet-gear speed reducer
Part can be conducive to the starting torque requirement for reducing servo motor, to enhance the adaptability that servo motor externally loads variation；
Reduce the shake of servo motor zero-bit due to caused by mechanical property, to enhance electrohydraulic servo valve in the stability of zero-bit；Pass through
The time of servo motor frequent start-stop is appropriately extended, to enhance servo motor in the controllability of zero-bit attachment；Planetary gear slows down
Machine is by using two pairs of planet wheel sets, to reduce the zero-bit position error as caused by gear backlash.It is set by technique
The improvement of meter makes this electrohydraulic servo valve have better processing technology and assembly technology.
Detailed description of the invention
Fig. 1 is main view structure schematic diagram of the invention；
Fig. 2 is main view schematic cross-sectional view of the invention；
Fig. 3 is planetary reducer schematic cross-sectional view of the invention；
Title corresponding to serial number is as follows in figure:
Direct current brushless servo motor 1, output side body 11, output shaft 12, valve component 2, planet-gear speed reducer 3, sleeve
30, upper end cover 31, planet carrier 32, center delivery outlet 321, planet axis 33, partition 34, central axial inner cavity 35, upper centre tooth 36,
Lower centre tooth 37, upper planet tooth 38, lower planet tooth 39, upper machine body 301, lower body 302, sleeve axial direction locating slot 303, spool 4,
Step Shaft 41, flat recess structure 42, valve pocket 5, upper end cap assemblies 6, external screw thread 61, upper end cover 62, the first concave hole 621, second
Tabletting 63 on concave hole 622, upper end cover, upper surface central area be convex 631, stepped hole 632, upper end cover lower sheeting 64, first
Fastening screw 65, Glais ring 66, lower end cap assemblies 7, lower cover 71, lower cover pressing plate 72, the second fastening screw 73.
Specific embodiment
Screw thread inserting type rotation with planet-gear speed reducer is straight to drive electrohydraulic servo valve, and see Fig. 1-Fig. 3: it includes brush DC
The output end of servo motor 1, valve component 2, planet-gear speed reducer 3, the direct current brushless servo motor 1 connects the planetary gear
The input terminal of speed reducer 3, the output end of the planet-gear speed reducer 3 connect the spool 21 of the valve component 2.
Valve component 2 includes spool 4, valve pocket 5, upper end cap assemblies 6, lower end cap assemblies 7, and planet-gear speed reducer 3 also wraps
Upper end cover 31, body, planet carrier 32, planet axis 33, centre tooth, partition 34 are included, upper end cover 31 is close to brush DC servo electricity
The output side body 11 of machine 1 arranges that the space inner ring between partition 34 and planet carrier is furnished with several planet axis 33, each planet axis
Corresponding planetary gear is set on 33, the inserting of output shaft 12 of direct current brushless servo motor 1 enters the center of planet-gear speed reducer 3
In axial bore 35, the part positioned at central axial inner cavity 35 of output shaft 12 is installed with centre tooth, and tooth engagement connection in center is every
The planetary gear of a ring cloth, valve component 2 of the planet carrier 32 close to lower section arrange that the central axial of planet carrier 32 is connected with spool 4
Central axis convex part, body envelopes centre wheel, planet carrier 32, planet axis arrangement, on the axial ends of body is close to
The lower end surface of end cap 31, the radial outside upper surface of upper end cap assemblies 6 are arranged；The outer circumferential surface of upper end cap assemblies 6 is equipped with outer spiral shell
Line 61, external screw thread 61 with the installation of integrated valve block for connecting.
Direct current brushless servo motor 1 is located at axial one end arrangement of planet-gear speed reducer 3, and valve component 2 is located at planetary gear
The axial other end of speed reducer 3 is arranged, ensures that total axial direction upper volume is small；
The axial region that the output shaft 12 of direct current brushless servo motor 1 corresponds to central axial inner cavity 35 passes through first sleeve
Axial segmentation, upper centre tooth 36, lower centre tooth 37 are set in the corresponding region of output shaft 12, every planet axis by flat key respectively
The 33 axial height position corresponding to first sleeve is set with second sleeve, is respectively installed with upper planet in every planet axis 33
Tooth 38, lower planet tooth 39,38 tooth engagement of upper planet connect upper centre tooth 36, and the engagement of lower planet tooth 39 connects lower centre tooth 37；
First sleeve, second sleeve are integrally formed integrated sleeve 30, it is ensured that easy installation and reliable；
Upper centre tooth 36, lower centre tooth 37 are identical structure gear, and upper planet tooth 38, lower planet tooth 39 are identical structure tooth
Wheel ensures to make simple, quick；
Body includes upper machine body 301, lower body 302, and the lower end surface cloth of upper end cover 31 is close in the upper surface of upper machine body 301
It sets, the lower end surface of upper machine body 301 is close to the upper surface setting of lower body 302, the bonding position of upper machine body 301, lower body 302
Annular inner portion is recessed sleeve axial direction locating slot 303, it is ensured that the axially position of sleeve 30 is installed, the lower end surface of lower body 302
It is close to the radial outside upper surface arrangement of upper end cap assemblies 6；
The convex part of the central axis of spool 4 is specially Step Shaft 41, and Step Shaft 41 inserts in planet carrier 32 by flat key admittedly
Center delivery outlet 321；
Valve pocket 5 it is interior it is intracavitary be disposed with spool 4, the upper end cover of valve pocket 5 is equipped with upper end cap assemblies 6, the lower end surface of valve pocket 5
Lid is equipped with lower end cap assemblies 7；
The lower end of spool 4 is provided with flat recess structure 42, debugging convenient for assembly；
Upper end cap assemblies 6 specifically include upper end cover 62, tabletting 63, upper end cover lower sheeting 64 on upper end cover, and upper end cover 62 is right
The lower section of the planet carrier 32 of planet-gear speed reducer 3 should be provided with the first concave hole 621,63 clearance fit of tabletting is pacified on upper end cover
Loaded in the first concave hole 621, the lower surface of tabletting 63 on upper end cover is bonded the bottom face arrangement of the first concave hole 621, upper end
The upper surface central area convex 631 for covering tabletting 63 is mounted on the corresponding position lower end surface of planet carrier 32, states and presses on upper end cover
The upper surface central area convex 632 of piece 63 is wear-resistant material, and the center of the lower surface of upper end cover 62 is recessed second
Concave hole 622, the interference fit of upper end cover lower sheeting 64 are installed on the second concave hole 622, and the upper surface of upper end cover lower sheeting 64 is tight
The upper surface arrangement of the second concave hole 622 is pasted, screw connects tabletting 63, upper end cover 63, upper end cover lower sheeting 64 on upper end cover
Upper end cap assemblies 6 are formed, the center of upper end cap assemblies 6 is run through in the convex part of the central axis of spool 4；
The correspondence upper surface for being fastenedly connected upper end cap assemblies 6, valve pocket 5 of first fastening screw 65, it is ensured that it is easy to assembly can
It leans on；
The part that tabletting 63 corresponds to central axis on upper end cover is provided with stepped hole 632, is disposed with Ge Lai in stepped hole 632
Circle 66；
Lower end cap assemblies 7 include lower cover 71, lower cover pressing plate 72, and lower cover pressing plate 72 is provided centrally with a center circle
Hole, the circumferencial direction setting of center hole is there are two oil return hole, and screw is by lower cover 71, the affixed formation lower end of lower cover pressing plate 72
Cap assemblies 7,72 center hole of lower cover pressing plate and the centre bore of lower cover 71 are coaxially arranged, the oil return hole of lower cover pressing plate 72 with
The channel the arc-shaped T alignment of lower cover 7；
Second fastening screw 73 is fastenedly connected the correspondence lower end surface of lower end cap assemblies 7, valve pocket 5, it is ensured that easy to assembly reliable.
In the technical program, the assembled relation and valve pocket 5 and upper end cap assemblies 6 of spool 4 and valve pocket 5, lower end cap assemblies
7 channel and oilhole setting and arrangement are identical with the straight drive electrohydraulic servo valve of existing screw thread inserting type rotation, and so it will not be repeated.
After applying the present invention, the straight structure driven electrohydraulic servo valve and add planet-gear speed reducer is rotated with screw thread inserting type, inherited
Screw thread inserting type rotation straight the advantages of driving electrohydraulic servo valve, and overcome that servo motor highlighted in zero-location control lacks
Point；The straight electro-hydraulic converter section for driving electrohydraulic servo valve is rotated as screw thread inserting type using DC servo motor plus planet-gear speed reducer
Point, the starting torque requirement for reducing servo motor can be conducive to, to enhance the adaptability that servo motor externally loads variation；Subtract
Small servo motor zero-bit due to caused by mechanical property shake, to enhance electrohydraulic servo valve in the stability of zero-bit；By suitable
When the time for extending servo motor frequent start-stop, to enhance servo motor in the controllability of zero-bit attachment；Planet-gear speed reducer
By using two pairs of planet wheel sets, to reduce the zero-bit position error as caused by gear backlash.Pass through technological design
Improvement, make this electrohydraulic servo valve have better processing technology and assembly technology.
Specific embodiments of the present invention are described in detail above, but content is only the preferable implementation of the invention
Example, should not be considered as limiting the invention the practical range of creation.It is all to become according to equalization made by the invention application range
Change and improve etc., it shall still fall within the scope of this patent.
Claims (10)
1. the screw thread inserting type rotation with planet-gear speed reducer is straight to drive electrohydraulic servo valve, it is characterised in that: it includes brush DC
Servo motor, valve component, planet-gear speed reducer, the output end of the direct current brushless servo motor connect the planetary gear and slow down
The input terminal of machine, the output end of the planet-gear speed reducer connect the spool of the valve component.
2. the screw thread inserting type rotation with planet-gear speed reducer is straight as described in claim 1 drives electrohydraulic servo valve, feature exists
In: the valve component includes spool, valve pocket, upper end cap assemblies, lower end cap assemblies, and the planet-gear speed reducer further includes having
Upper end cover, body, planet carrier, planet axis, centre tooth, partition, the upper end cover are close to the defeated of the direct current brushless servo motor
Side body is arranged out, and the space inner ring between the partition and the planet carrier is furnished with several planet axis, each planet axis
On be set with corresponding planetary gear, the output shaft inserting of the direct current brushless servo motor enters in the planet-gear speed reducer
Mandrel is inwardly intracavitary, and the part positioned at the central axial inner cavity of the output shaft is installed with centre tooth, and the centre tooth is nibbled
The planetary gear for connecting each ring cloth is closed, the valve component of the planet carrier close to lower section is arranged, the planet carrier
The convex part of the central axial central axis for being connected with spool, the body envelope the centre wheel, planet carrier, planet axis cloth
It sets, the axial ends of the body is close to the radial outside upper surface arrangement of the lower end surface of the upper end cover, upper end cap assemblies；Institute
The outer circumferential surface for stating upper end cap assemblies is equipped with external screw thread, and the external screw thread with the installation of integrated valve block for connecting.
3. the screw thread inserting type rotation with planet-gear speed reducer is straight as claimed in claim 2 drives electrohydraulic servo valve, feature exists
In: axial one end that the direct current brushless servo motor is located at the planet-gear speed reducer arranges that the valve component is located at row
The axial other end of star wheel reducer is arranged.
4. the screw thread inserting type rotation with planet-gear speed reducer is straight as claimed in claim 3 drives electrohydraulic servo valve, feature exists
In: the axial region that the output shaft of the direct current brushless servo motor corresponds to the central axial inner cavity passes through first sleeve axis
To segmentation, upper centre tooth, lower centre tooth pass through the corresponding region that flat key is set in the output shaft, the every planet axis respectively
The axial height position corresponding to the first sleeve be set with second sleeve, be respectively installed in the every planet axis
Planet tooth, lower planet tooth, the upper planet tooth engagement connect the upper centre tooth, the lower planet tooth engagement connection it is described it is lower in
Heart tooth.
5. the screw thread inserting type rotation with planet-gear speed reducer is straight as claimed in claim 4 drives electrohydraulic servo valve, feature exists
In: the first sleeve, second sleeve are integrally formed integrated sleeve.
6. the screw thread inserting type rotation with planet-gear speed reducer is straight as claimed in claim 4 drives electrohydraulic servo valve, feature exists
In: the upper centre tooth, lower centre tooth are identical structure gear, and the upper planet tooth, lower planet tooth are identical structure gear.
7. the screw thread inserting type rotation with planet-gear speed reducer is straight as claimed in claim 5 drives electrohydraulic servo valve, feature exists
In: the body includes upper machine body, lower body, and the lower end surface arrangement of the upper end cover, institute are close in the upper surface of the upper machine body
State upper machine body lower end surface be close to the lower body upper surface setting, the upper machine body, lower body bonding position inner ring
Part is recessed sleeve axial direction locating slot, and the radial outside upper end of the upper end cap assemblies is close in the lower end surface of the lower body
Face arrangement.
8. the screw thread inserting type rotation with planet-gear speed reducer is straight as claimed in claim 2 drives electrohydraulic servo valve, feature exists
In: the convex part of the spool is specially Step Shaft, and the Step Shaft is defeated by the center that flat key inserts in the planet carrier admittedly
Portal.
9. the screw thread inserting type rotation with planet-gear speed reducer is straight as claimed in claim 2 drives electrohydraulic servo valve, feature exists
Upper end cover is specifically included in: upper end cap assemblies, tabletting, upper end cover lower sheeting on upper end cover, the upper end cover corresponds to institute
It states and is provided with the first concave hole below the planet carrier of planet-gear speed reducer, sheeting nip is coupled in institute on the upper end cover
State in the first concave hole, on the upper end cover lower surface of tabletting be bonded first concave hole bottom face arrangement, it is described on
The convex corresponding position lower end surface for being mounted on the planet carrier in the upper surface central area of tabletting on end cap, it is described to state on upper end cover
The convex upper surface central area of tabletting is wear-resistant material, and the center of the lower surface of the upper end cover is recessed in second
Shrinkage pool, the upper end cover lower sheeting interference fit are installed on second concave hole, and the upper surface of the upper end cover lower sheeting is tight
The upper surface arrangement of second concave hole is pasted, screw connects tabletting, upper end cover, upper end cover lower sheeting on upper end cover to form institute
Upper end cap assemblies are stated, the center of the upper end cap assemblies is run through in the convex part of the central axis of spool.
10. the screw thread inserting type rotation with planet-gear speed reducer is straight as claimed in claim 2 drives electrohydraulic servo valve, feature exists
In: the lower end cap assemblies include lower cover, lower cover pressing plate, and the lower cover pressing plate is provided centrally with a center hole,
The circumferencial direction setting of the center hole is there are two oil return hole, and screw is by lower cover, the affixed formation lower cover of lower cover pressing plate
The centre bore of component, the lower cover pressing plate center hole and lower cover is coaxially arranged, the oil return hole of the lower cover pressing plate with
The channel the arc-shaped T alignment of lower cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811206773.XA CN109185251A (en) | 2018-10-17 | 2018-10-17 | Screw thread inserting type rotation with planet-gear speed reducer is straight to drive electrohydraulic servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811206773.XA CN109185251A (en) | 2018-10-17 | 2018-10-17 | Screw thread inserting type rotation with planet-gear speed reducer is straight to drive electrohydraulic servo valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109185251A true CN109185251A (en) | 2019-01-11 |
Family
ID=64945491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811206773.XA Withdrawn CN109185251A (en) | 2018-10-17 | 2018-10-17 | Screw thread inserting type rotation with planet-gear speed reducer is straight to drive electrohydraulic servo valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109185251A (en) |
-
2018
- 2018-10-17 CN CN201811206773.XA patent/CN109185251A/en not_active Withdrawn
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Application publication date: 20190111 |