CN208764263U - Lubricated balls screw rod and ball screw component - Google Patents
Lubricated balls screw rod and ball screw component Download PDFInfo
- Publication number
- CN208764263U CN208764263U CN201821512130.3U CN201821512130U CN208764263U CN 208764263 U CN208764263 U CN 208764263U CN 201821512130 U CN201821512130 U CN 201821512130U CN 208764263 U CN208764263 U CN 208764263U
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- China
- Prior art keywords
- screw rod
- lubrication
- spiral groove
- oil pocket
- ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005461 lubrication Methods 0.000 claims abstract description 69
- 239000003921 oil Substances 0.000 claims abstract description 50
- 230000001050 lubricating effect Effects 0.000 claims abstract description 30
- 239000010687 lubricating oil Substances 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims description 15
- 229920001821 foam rubber Polymers 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Transmission Devices (AREA)
Abstract
A kind of lubricated balls screw rod and ball screw component, belong to transmission device field.The lubricated balls screw rod includes that outer wall is equipped with the screw rod of external spiral groove, is sheathed on the nut and multiple balls of screw rod, and nut is equipped with inner spiral groove, and external spiral groove and inner spiral groove cooperatively form the ball channel for accommodating ball；At least one end of nut is connected with the lubrication lid being sheathed on screw rod, the oil pocket for storing lubricating oil is equipped in lubrication lid, the lubricating cavity being connected to oil pocket and the lubrication assembly compressed with external spiral groove are equipped between lubrication lid and external spiral groove, lubrication assembly is configured to move radially along screw rod so that oil pocket is connected to or is truncated with lubricating cavity.Lubricated balls screw rod provided by the utility model can effectively improve the greasy property of ball screw, prolong its service life.The utility model additionally provides a kind of ball screw component comprising above-mentioned lubricated balls screw rod.
Description
Technical field
The utility model relates to transmission device fields, in particular to a kind of lubricated balls screw rod and ball screw group
Part.
Background technique
Ball screw is a kind of common linear moving apparatus, can convert rotational motion into linear motion, at present
Existing ball screw mostly includes screw rod and the nut for being sheathed on screw rod, be equipped between screw rod and nut it is multiple can be along the circulation path
The ball that diameter moves back and forth is generated relative rotation when being rotated using electric motor driven screw, between screw rod and nut and drives spiral shell
Mother moves along a straight line.But screw rod can not effectively be lubricated when existing ball screw running at present, use one
The stability and precision of ball screw running are influenced whether after the time of end, and are reduced the service life.
Therefore, it is necessary to a kind of ball screw devices that effectively lubricating can be carried out to screw rod.
Utility model content
The purpose of this utility model is to provide a kind of lubricated balls screw rods, can effectively improve the profit of ball screw
Slip energy, prolongs its service life.
The another object of the utility model is to provide a kind of ball screw component, good with greasy property, use the longevity
Order long advantage.
The embodiments of the present invention are achieved in that
A kind of lubricated balls screw rod comprising outer wall is equipped with the screw rod of external spiral groove, is sheathed on the nut of screw rod and multiple
Ball, nut are equipped with inner spiral groove, and external spiral groove and inner spiral groove cooperatively form the ball channel for accommodating ball；Nut
At least one end is connected with the lubrication lid being sheathed on screw rod, is equipped with the oil pocket for storing lubricating oil in lubrication lid, lubrication lid and
The lubricating cavity being connected to oil pocket and the lubrication assembly compressed with external spiral groove are equipped between external spiral groove, lubrication assembly is configured to can
It is moved radially along screw rod so that oil pocket is connected to or is truncated with lubricating cavity.
In the utility model preferred embodiment, above-mentioned lubrication assembly includes the first bulb and company in lubricating cavity
Bar and the second bulb in oil pocket, the both ends of connecting rod are separately connected the first bulb and the second bulb.
In the utility model preferred embodiment, the inner wall of above-mentioned oil pocket is equipped with the ball groove for accommodating the second bulb.
In the utility model preferred embodiment, above-mentioned connecting rod is equipped with jacking block close to one end of the first bulb, on connecting rod
It is arranged with the spring that both ends compress jacking block and lubrication lid respectively.
Both ends are equipped in the utility model preferred embodiment, in above-mentioned oil pocket to compress respectively in the second bulb and oil pocket
The spring of wall.
In the utility model preferred embodiment, above-mentioned lubrication lid is additionally provided with far from nut one end to be sheathed on screw rod
Dust ring, the inner wall of dust ring are equipped with the dedusting pad compressed with external spiral groove.
In the utility model preferred embodiment, the end of above-mentioned lubrication lid is equipped with the installation for installing dust ring
Slot.
In the utility model preferred embodiment, the inner wall of above-mentioned dedusting pad is equipped with the sponge compressed with external spiral groove
Pad.
In the utility model preferred embodiment, above-mentioned foam-rubber cushion is located between dedusting pad and lubrication lid.
The utility model additionally provides a kind of ball screw component comprising lubricated balls screw rod and for driving screw rod to revolve
The electric machine assembly turned.
The beneficial effect of the utility model embodiment is: lubricated balls screw rod provided by the embodiment of the utility model includes outer
Wall is equipped with the screw rod of external spiral groove, is sheathed on the nut and multiple balls of screw rod, and nut is equipped with inner spiral groove, external spiral groove and interior
Helicla flute cooperatively forms the ball channel for accommodating ball；At least one end of nut is connected with the lubrication being sheathed on screw rod
Lid, the interior oil pocket being equipped with for storing lubricating oil of lubrication lid, is equipped with the lubrication being connected to oil pocket between lubrication lid and external spiral groove
Chamber and the lubrication assembly compressed with external spiral groove, lubrication assembly is configured to move radially along screw rod so that oil pocket and lubricating cavity connect
Logical or truncation.Lubricated balls screw rod provided by the utility model can effectively improve the greasy property of ball screw, extend it
Service life.The utility model additionally provides a kind of ball screw component comprising above-mentioned lubricated balls screw rod, has lubrication
The advantages of performance is good, long service life.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the cross-sectional view for the lubricated balls screw rod that the utility model embodiment 1 provides；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the cross-sectional view for the lubricated balls screw rod that the utility model embodiment 2 provides；
Fig. 4 is the partial enlarged view in Fig. 3 at B.
In figure: 001- lubricated balls screw rod；002- lubricated balls screw rod；100- screw rod；101- external spiral groove；110- reflux
Channel；120- nut；121- inner spiral groove；130- ball；150- lubrication lid；151- oil pocket；152- lubricating cavity；153- ball groove；
154- mounting groove；The first bulb of 160-；161- connecting rod；The second bulb of 162-；163- jacking block；164- spring；170- dust ring；
180- dedusting pad；190- foam-rubber cushion.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area
Divide description, is not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
Embodiment 1
It please refers to shown in Fig. 1 and Fig. 2, the present embodiment provides a kind of lubricated balls screw rods 001 comprising outer wall is equipped with outer spiral shell
The screw rod 100 of spin slot 101, the nut 120 and multiple balls 130 for being sheathed on screw rod 100, nut 120 are equipped with inner spiral groove 121,
External spiral groove 101 and inner spiral groove 121 cooperatively form the ball channel for accommodating ball 130；At least one end of nut 120 connects
It is connected to the lubrication lid 150 being sheathed on screw rod 100, the oil pocket 151 for storing lubricating oil, lubrication lid are equipped in lubrication lid 150
The lubricating cavity 152 being connected to oil pocket 151 and the lubrication group compressed with external spiral groove 101 are equipped between 150 and external spiral groove 101
Part, lubrication assembly are configured to move radially along screw rod 100 so that oil pocket 151 is connected to or is truncated with lubricating cavity 152；The present embodiment
In, one end of nut 120 is connected with the lubrication lid 150 being sheathed on screw rod 100, and screw rod 100 has the cylindrical body of rod, nut
120 be the circular cylinder that can be sheathed on screw rod 100, when nut 120 is sheathed on screw rod 100, the setting of 120 inner wall of nut
Inner spiral groove 121 and the external spiral groove 101 of 100 outer wall of screw rod setting cooperatively form ball channel, and reflux is additionally provided in nut 120
Channel 110, ball channel and return flow line 110 cooperatively form the circulating path mobile for ball, wherein screw rod 100, nut
120, ball channel and return flow line 110 are structure disclosed in the prior art, and not this Applicant's Abstract graph innovative point.
Lubricated balls screw rod 001 provided by the embodiment of the utility model is connected with lubrication lid 150 in one end of nut 120,
The lubrication lid 150 can be lubricated processing to the external spiral groove 101 that 100 outer wall of screw rod is equipped with, and guarantee lubricated balls screw rod 001
The stability of operating；It wherein is equipped with oil pocket 151 in the lubrication lid 150 of 120 end of nut connection, is perfused with lubrication in oil pocket 151
Oil lubricates the lubricating cavity 152 for being equipped between lid 150 and external spiral groove 101 and being connected to oil pocket 151, and being equipped in lubricating cavity 152 can edge
Screw rod 100 moves radially so that the lubrication assembly that oil pocket 151 is connected to or is truncated with lubricating cavity 152, when nut 120 is along screw rod 100
Drive lubrication lid 150 along 100 synchronizing moving of screw rod when mobile, to drive the lubrication being set between lubrication lid 150 and screw rod 100
Component is moved along external spiral groove 101, and lubrication assembly is made to move repeatedly connection or the truncation oil pocket of intermittent along the radial direction of screw rod 100
151 and lubricating cavity 152, processing is lubricated to external spiral groove 101 using the lubricating oil placed in oil pocket 151, thus effectively
Improve the greasy property of lubricated balls screw rod 001.
In a preferred embodiment of the utility model, lubrication assembly includes the first ball in lubricating cavity 152
First 160 and connecting rod 161 and the second bulb 162 in oil pocket 151,161 both ends of connecting rod be separately connected the first bulb 160 and
Two bulbs 162.Lubrication assembly includes the first bulb 160 in lubricating cavity 152, the second bulb in oil pocket 151
162 and the connecting rod 161 that is connect respectively with the first bulb 160 and the second bulb 162, when lubrication assembly is moved along external spiral groove 101
When, external spiral groove 101 pushes the first bulb 160 to drive connecting rod 161 mobile to drive the second bulb 162 mobile to be connected to or cut
Oil-break chamber 151 and lubricating cavity 152, so that the lubricating oil in oil pocket 151 is intermittent into lubricating cavity 152 and to external spiral groove
101 are lubricated processing, which has the advantages of high sensitivity, fast response time.
In a preferred embodiment of the utility model, the inner wall of oil pocket 151 is equipped with the ball for accommodating the second bulb 162
Slot 153.The ball groove 153 of 151 inner wall of oil pocket setting can cooperate with the second bulb 162 being located in oil pocket 151, be convenient for the second ball
First 162 connection or truncation oil pocket 151 and lubricating cavity 152 guarantee that lubricating oil is intermittent slow into the external spiral shell of lubricating cavity 152
Spin slot 101 is lubricated processing.
In a preferred embodiment of the utility model, connecting rod 161 is equipped with jacking block close to one end of the first bulb 160
163, it is arranged with both ends on connecting rod 161 and compresses jacking block 163 respectively and lubricates the spring 164 of lid 150, in the present embodiment, jacking block 163
For annular.Spring 164 is arranged on connecting rod 161, the both ends of spring 164 compress jacking block 163 and lubrication 150 inner wall of lid respectively,
The spring 164 can rapidly drive connecting rod 161 multiple after the first bulb 160 pushes connecting rod 161 and the second bulb 162 is mobile
Position guarantees that card lubricating oil is intermittent slow to drive the second bulb 162 oil pocket 151 and lubricating cavity 152 that quickly truncation is connected to
Slow is lubricated processing to external spiral groove 101 into lubricating cavity 152.
Embodiment 2
Referring to figure 3. and shown in Fig. 4, the present embodiment provides a kind of lubricated balls screw rods 002 comprising outer wall is equipped with outer spiral shell
The screw rod 100 of spin slot 101, the nut 120 and multiple balls 130 for being sheathed on screw rod 100, nut 120 are equipped with inner spiral groove 121,
External spiral groove 101 and inner spiral groove 121 cooperatively form the ball channel for accommodating ball 130；One end of nut 120 is connected with
The lubrication lid 150 being sheathed on screw rod 100, the interior oil pocket 151 being equipped with for storing lubricating oil of lubrication lid 150, lubricates 150 He of lid
The lubricating cavity 152 being connected to oil pocket 151 and the lubrication assembly compressed with external spiral groove 101, lubrication are equipped between external spiral groove 101
Component Configuration along screw rod 100 at can move radially so that oil pocket 151 is connected to or is truncated with lubricating cavity 152；Screw rod 100 has cylinder
The body of rod of shape, nut 120 is the circular cylinder that can be sheathed on screw rod 100, when nut 120 is sheathed on screw rod 100, nut
The inner spiral groove 121 of 120 inner walls setting and the external spiral groove 101 of 100 outer wall of screw rod setting cooperatively form ball channel, nut
Return flow line 110 is additionally provided in 120, ball channel and return flow line 110 cooperatively form the circulating path mobile for ball；Lubrication
Component includes the first bulb 160 being set in lubricating cavity 152 and connecting rod 161 and the second bulb 162 in oil pocket 151, is connected
One end of bar 161 compresses the first bulb 160, and the other end connects the second bulb 162, and the inner wall of oil pocket 151, which is equipped with, accommodates the second ball
First 162 ball groove 153, the interior spring 164 for compressing 151 inner wall of the second bulb 162 and oil pocket respectively equipped with both ends of oil pocket 151.
In lubricated balls screw rod 002 provided by the embodiment of the utility model, the spring 164 being set in oil pocket 151 can
The second bulb 162 is rapidly pushed to reset after the mobile connection oil pocket 151 of the second bulb 162 and lubricating cavity 152, thus quickly
The oil pocket 151 and lubricating cavity 152 of connection is truncated, guarantees the intermittent slow lubricating cavity 152 that enters of card lubricating oil to external spiral
Slot 101 is lubricated processing.
In a preferred embodiment of the utility model, lubrication lid 150 is additionally provided with far from 120 one end of nut to be sheathed on
Dust ring 170 on screw rod 100, the inner wall of dust ring 170 are equipped with the dedusting pad 180 compressed with external spiral groove 101.It is covered in lubrication
150 are provided with dust ring 170 far from 120 one end of nut, and lubrication lid 150 and dust-proof is driven when nut 120 is moved along screw rod 100
Ring 170 is synchronous to be moved along screw rod 100, so that the dedusting pad 180 being arranged using 170 inner wall of dust ring is in advance to 100 table of screw rod
The external spiral groove 101 in face is dusted processing, is then lubricated using lubrication lid 150 to external spiral groove 101, guarantee dedusting,
The continuous-stable of lubrication operation carries out.
In a preferred embodiment of the utility model, the end of lubrication lid 150 is equipped with for installing dust ring 170
Mounting groove 154, in the present embodiment, dust ring 170 is removably connect by bolt with lid 150 is lubricated.Dust ring 170 is fixed
Occupied space can be reduced in lubrication 150 end of lid and reduce the volume of lubricated balls screw rod 002.
In a preferred embodiment of the utility model, the inner wall of dedusting pad 180 is equipped with to be compressed with external spiral groove 101
Foam-rubber cushion 190, the foam-rubber cushion 190 by being set to 180 inner wall of dedusting pad can further remove in external spiral groove 101
Dust, and extra greasy dirt can be adsorbed, guarantee to clear up external spiral groove 101 with the cooperation of dedusting pad 180.
In a preferred embodiment of the utility model, foam-rubber cushion 190 be located at dedusting pad 180 and lubrication lid 150 it
Between.Foam-rubber cushion 190 between dedusting pad 180 and lubrication lid 150 is external when can guarantee that nut 120 is moved along screw rod 100
Helicla flute 101 is successively dusted, oil removing, lubrication operation, to effectively be cleared up screw rod 100, improves lubricated balls
The stability and running precision that screw rod 002 is run.
The utility model additionally provides a kind of ball screw component comprising above-mentioned lubricated balls screw rod 001 or lubrication
Ball screw 002, and the electric machine assembly for driving screw rod 100 to rotate.The ball screw component is with greasy property is good, makes
With the advantage that the service life is long.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of lubricated balls screw rod comprising outer wall is equipped with the screw rod of external spiral groove, is sheathed on the nut of the screw rod and more
A ball, the nut are equipped with inner spiral groove, and the external spiral groove and the inner spiral groove are cooperatively formed for accommodating the rolling
The ball channel of pearl；It is characterized in that, at least one end of the nut is connected with the lubrication lid being sheathed on the screw rod, it is described
It is equipped with the oil pocket for storing lubricating oil in lubrication lid, is equipped between the lubrication lid and the external spiral groove and connects with the oil pocket
Logical lubricating cavity and the lubrication assembly compressed with the external spiral groove, the lubrication assembly are configured to radially move along the screw rod
It moves so that the oil pocket is connected to or is truncated with the lubricating cavity.
2. lubricated balls screw rod according to claim 1, which is characterized in that the lubrication assembly includes being set to the lubrication
The first intracavitary bulb and connecting rod and the second bulb in the oil pocket, the both ends of the connecting rod are separately connected described first
Bulb and second bulb.
3. lubricated balls screw rod according to claim 2, which is characterized in that the inner wall of the oil pocket, which is equipped with, accommodates described the
The ball groove of two bulbs.
4. lubricated balls screw rod according to claim 2, which is characterized in that the connecting rod close to first bulb one
End is equipped with jacking block, and the spring that both ends compress the jacking block and the lubrication lid respectively is arranged on the connecting rod.
5. lubricated balls screw rod according to claim 2, which is characterized in that be equipped with both ends in the oil pocket and compress institute respectively
State the spring of the second bulb and the oil pocket inner wall.
6. lubricated balls screw rod according to claim 1, which is characterized in that the lubrication is covered far from described nut one end also
Equipped with the dust ring being sheathed on the screw rod, the inner wall of the dust ring is equipped with the dedusting pad compressed with the external spiral groove.
7. lubricated balls screw rod according to claim 6, which is characterized in that the end of the lubrication lid is equipped with for installing
The mounting groove of the dust ring.
8. lubricated balls screw rod according to claim 6, which is characterized in that the inner wall of the dedusting pad be equipped with it is described outer
The foam-rubber cushion that helicla flute compresses.
9. lubricated balls screw rod according to claim 8, which is characterized in that the foam-rubber cushion is located at the dedusting pad and institute
It states between lubrication lid.
10. a kind of ball screw component, which is characterized in that it includes lubricated balls as claimed in any one of claims 1-9 wherein
Screw rod and electric machine assembly for driving screw rod rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821512130.3U CN208764263U (en) | 2018-09-14 | 2018-09-14 | Lubricated balls screw rod and ball screw component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821512130.3U CN208764263U (en) | 2018-09-14 | 2018-09-14 | Lubricated balls screw rod and ball screw component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208764263U true CN208764263U (en) | 2019-04-19 |
Family
ID=66135012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821512130.3U Expired - Fee Related CN208764263U (en) | 2018-09-14 | 2018-09-14 | Lubricated balls screw rod and ball screw component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208764263U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963640A (en) * | 2020-08-19 | 2020-11-20 | 詹叶英 | Novel spiral speed regulating device |
-
2018
- 2018-09-14 CN CN201821512130.3U patent/CN208764263U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963640A (en) * | 2020-08-19 | 2020-11-20 | 詹叶英 | Novel spiral speed regulating device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190419 |