CN204921889U - Drive screw clutching mechanism - Google Patents
Drive screw clutching mechanism Download PDFInfo
- Publication number
- CN204921889U CN204921889U CN201520474014.7U CN201520474014U CN204921889U CN 204921889 U CN204921889 U CN 204921889U CN 201520474014 U CN201520474014 U CN 201520474014U CN 204921889 U CN204921889 U CN 204921889U
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- slide mass
- clutch
- screw rod
- nut
- groove
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Abstract
The utility model relates to a drive screw clutching mechanism, it includes the screw rod, slide mass and clutch, wherein the screw rod is worn to establish in this slide mass inside, the screw rod meshing has the nut in the concave solid groove of setting up a checkpoint of surface, the accommodation space perpendicularly to the groove surface loop outside the slide mass that runs through be equipped with at least one circular arc inclined plane, clutch's the corresponding card that is equipped with at least one arcuation inclined plane and encircles of clutch is sold admittedly, make its and the circular arc inclined plane convex -concave looks butt joint of slide mass through rotatory clutch, let nut and slide mass combine, or with convex part looks butt joint, let nut and slide mass break away from, when predetermineeing the motor power failure or damaging, let clutch and slide mass be the dissengaged positions, the screw rod can not rotate along with the displacement of slide mass, the user is laborsaving just can to promote to predetermine the article, and must not move because predetermine the motor, also can avoid predetermineeing the motor further damages.
Description
Technical field
The utility model provides a kind of drive screw clutch mechanism, espespecially be used in the drive screw clutch mechanism of electric pushrod, it utilizes the arcuation inclined-plane of clutch and the radiused ramp of slide mass, and turn allows the holding division fixing pin exit the fixing slot of nut whereby, make slide mass can not with nut interlock.
Background technique
Drive screw (power spin) is a kind of mechanical assembly of basis, by limiting the rotation of nut, can change screw rod spinning movement into nut straight line motion.Common power spin form has and engages each other with external thread of screw and nut internal thread the driving screw group that produces relative sliding or have the relative ball screw group of rolling of ball between screw rod and nut.Electric pushrod then combines motor and reducing gear (normally gear train), through being changed to linear thrust by drive screw after the running torque amplification that electric energy is produced, again by being combined with dynamic link with nut, reach change one and preset object angle, position or object highly, due to easy to use and widely all circles applied, as medical treatment or occupy beds for domestic use, massage chair, fitness equipments, enabling/window opener, lift or various industrial automation purposes.
But, due to intentional or unintentional reason, and cause motor lose electric power can not regular event time, then need assist to change with manpower and preset object angle, position or height, this external force forces screw rod to rotate, and then together with rotation speed reducer and motor, because the factor such as reduction speed ratio and mechanical advantage can allow this external force exceed human load, and cause producing the problem that cannot apply, if operate by force, also damage can be produced to motor or reducing gear.
In order to avoid there is above-mentioned problem, the clutch mechanism of many different types is just developed out by manufacturer, wherein a kind of mode is promptly or if desired, depart from engaging or the combination of speed reducer and drive screw between the link of motor output shaft and reducing gear, gear, its shortcoming is that reducing gear is complicated and takes up space, and even makes the effective travel of drive screw shorten.
Another kind of mode is the link of untiing default object and nut; default object is made to be unrestricted motion state; this mode can only can be born by manpower or have during other mechanism's supplemental support could use from body weight at default object; and its mode linked is huge for the length impact of separation time; it is just variant that such as single screwed lock pays the separation time of paying with 4 screwed locks; if when there is emergency; the disengaging of paying of 4 screwed locks may be too consuming time and produce dangerous; therefore the separation time is more short more helpful.
Therefore how to solve problem and the disappearance of prior art, be the relevant manufactures being engaged in the industry desire most ardently research improve place, direction.
Model utility content
Therefore creator is because above-mentioned problem and disappearance, so collection related data, via in many ways assessing and considering, and to engage in the many years of experience of the industry accumulation, via constantly studying and revising, the creation patent beginning to design this kind of drive screw clutch mechanism is born.
Main purpose of the present utility model is to rely on rotary clutch to make the radiused ramp convex-concave relative bonding of itself and slide mass allow nut and slide mass be bonding state, or clutch and slide mass allow nut and slide mass be disengaged position with protuberance relative bonding, allow when normally using, preset motor and drive bolt rotary, and slide mass just can move forward and backward on screw rod, when default motor has a power failure or damage, screw rod can not rotate with the displacement of slide mass, allowing user promote default object just can be laborsaving, and must action because preset motor, also default motor damages can be avoided.
Secondary objective of the present utility model is that the opposite side at least one arcuation inclined-plane of clutch appliance protrudes out the jack-post that inside wears polygonal keyway, engaging and disengaging gear is provided with the lid covering at least one radiused ramp of slide mass again, lid is extended with bar portion away from slide mass side, be provided with in bar portion and groove is run through to the polygonal keyway of positive clutch, polygonal instrument need be utilized could to insert polygonal keyway via running through groove correspondence, and turn clutch is disengaged position by nut and slide mass whereby, due to the shape of polygonal instrument, external diameter and length have corresponding design, and clutch cannot learn the specification of polygonal keyway by lid covers, when his human desires is opened, just cannot open with the polygonal instrument of correspondence, and then can anti-theft effect be promoted.
The structure that another object of the present utility model is to utilize clutch, fixes pin, elastic element and lid; the design of mode or automatic over power clutch protective gear is departed from compared to screw rod and gear; simple structure of the present utility model, volume are little not to take up space; and operation only needs to utilize polygonal instrument insert to rotate, so there is laborsaving, convenient and advantage fast.
When another object of the present utility model is to be installed in electric pushrod, if the load presetting object exceeds electric pushrod load, if preset motor be locked rotor condition and cannot cut off the electricity supply in time, still can be rotated by clutch in a manual manner rapidly allows nut and slide mass be disengaged position, and load can be allowed to decline to avoid damaging default motor or reducing gear.
For reaching above-mentioned purpose, the utility model provides a kind of drive screw clutch mechanism, and it comprises screw rod, slide mass and engaging and disengaging gear, wherein:
This screw rod outer surface has outside thread;
This slide mass inside has containing space, containing space both sides are provided with and are correspondingly communicated with the outside perforation that penetrates for screw rod and opening, be provided with in containing space and be placed on screw rod and the nut that can rotate, there is in nut the internal thread being engaged in external thread of screw, nut outer surface is arranged with at least one fixing slot, containing space be provided with perpendicular to perforation and opening shaft to run through groove, slide mass is equipped with at least one radiused ramp in running through the outer surface around groove;
This engaging and disengaging gear has clutch, clutch one side surface has at least one the arcuation inclined-plane aligning and be engaged in slide mass radiused ramp, and clutch opposite side has protruded out jack-post, polygonal keyway is equipped with in jack-post, clutch be provided with by arcuation inclined-plane around fixing sell, fix pin side and be convexly equipped with the flexible holding division snapping in nut fixing slot, engaging and disengaging gear is provided with the lid covering at least one radiused ramp of slide mass again, lid is extended with bar portion away from slide mass side, be provided with in bar portion and groove is run through to the polygonal keyway of positive clutch, run through the contiguous slide mass side of groove and be provided with the containing groove supplying clutch shift reciprocately.
Described drive screw clutch mechanism, wherein: this slide mass side is provided with the cover plate covered in opening, cover plate is equipped with the multiple lock members being locked in slide mass.
Described drive screw clutch mechanism, wherein: be provided with in the containing space of this slide mass and be placed on screw rod and the rolling element being connected to nut both sides, this rolling element is bearing.
Described drive screw clutch mechanism, wherein: the polygonal keyway side of this engaging and disengaging gear is provided with clamping trough, the opposite side of the relatively polygonal keyway of clamping trough is provided with the stop surface being positioned at least one arcuation chamfered inside central authorities, the opposite side fixing the relative holding division of pin protrudes out the fixing column inserting clamping trough, fixing column is arranged with and forms the urgent urgent collar for itself and clamping trough.
Described drive screw clutch mechanism, wherein: the jack-post clutch-adjacent side of this engaging and disengaging gear is convexly equipped with and supports rank portion, be arranged with one end outside jack-post and be held in the elastic element supporting rank portion, lid side is run through to be provided with between groove and containing groove to support for the elastic element the other end and supply to support pushing away of rank portion shift reciprocately and is held rank portion.
Described drive screw clutch mechanism, wherein: this screw rod is thread screw or ball screw.
The beneficial effects of the utility model are: when normally using, preset motor and drive bolt rotary, and slide mass just can move forward and backward on screw rod, when default motor has a power failure or damage, screw rod can not rotate with the displacement of slide mass, allowing user promote default object just can be laborsaving, and must action because preset motor, also can avoid default motor damages; Because the shape of polygonal instrument, external diameter and length have corresponding design, and clutch cannot learn the specification of polygonal keyway by lid covers, and when his human desires is opened, just cannot open with the polygonal instrument of correspondence, and then can promote anti-theft effect; Simple structure, volume are little not to take up space, and operation only needs to utilize polygonal instrument insert to rotate, so have laborsaving, convenient and advantage fast; When being installed in electric pushrod, if the load presetting object exceeds electric pushrod load, if preset motor be locked rotor condition and cannot cut off the electricity supply in time, still can be rotated by clutch in a manual manner rapidly allows nut and slide mass be disengaged position, and load can be allowed to decline to avoid damaging default motor or reducing gear.
Accompanying drawing explanation
Fig. 1 is the stereo appearance figure of the utility model preferred embodiment;
Fig. 2 is the three-dimensional exploded view of the utility model preferred embodiment;
Fig. 3 is another three-dimensional exploded view of the utility model preferred embodiment;
Fig. 4 is the side cutaway view of the utility model preferred embodiment;
Fig. 5 be the utility model nut with slide mass in conjunction with time side cutaway view;
Fig. 6 is the utility model nut and slide mass side cutaway view when departing from;
Fig. 7 is the stereo appearance figure of another embodiment of the utility model;
Fig. 8 is the side cutaway view of the another embodiment of the utility model.
Description of reference numerals: 1-screw rod; 11-outside thread; 2-slide mass; 20-containing space; 201-bores a hole; 202-opening; 21-nut; 210-internal thread; 211-fixing slot; 22-rolling element; 23-cover plate; 231-lock member; 24-runs through groove; 25-radiused ramp; 3-engaging and disengaging gear; 31-clutch; 311-arcuation inclined-plane; 312-jack-post; The polygonal keyway of 313-; 314-clamping trough; 315-stop surface; 316-supports rank portion; 32-fixes pin; 321-holding division; 322-fixing column; The urgent collar of 323-; 33-elastic element; 34-lid; 341-bar portion; 342-runs through groove; 343-pushes away and holds rank portion; 344-containing groove; The polygonal instrument of 4-; 5-hand switch.
Embodiment
For reaching above-mentioned purpose and effect, the technological means that the utility model adopts and structure thereof, just preferred embodiment of the present utility model of hereby drawing illustrates that its features and functions is as follows, in detail in order to understanding completely.
Refer to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, find out that this drive screw clutch mechanism comprises screw rod 1, slide mass 2 and engaging and disengaging gear 3 by knowing shown in figure; Wherein:
This screw rod 1 outer surface has outside thread 11.
This slide mass 2 inside has containing space 20, containing space 20 both sides are provided with and are correspondingly communicated with the outside perforation 201 that penetrates for screw rod 1 and opening 202, be provided with in containing space 20 and inserted by opening 202 and to be placed on screw rod 1 and rotating nut 21, there is in nut 21 internal thread 210 being engaged in screw rod 1 outside thread 11, nut 21 outer surface is arranged with at least one fixing slot 211, be provided with again in containing space 20 and be placed on screw rod 1 and the rolling element 22 being connected to nut 21 both sides, its rolling element 22 can be bearing or other elements, slide mass 2 side is provided with the cover plate 23 covered in opening 202, cover plate 23 is equipped with the multiple lock members 231 being locked in slide mass 2, containing space 20 is also provided with and runs through groove 24 perpendicular to perforation 201 and opening 202 axis, slide mass 2 is equipped with at least one radiused ramp 25 in running through the outer surface around groove 24.
This engaging and disengaging gear 3 has clutch 31, clutch 31 1 side surface has at least one the arcuation inclined-plane 311 aligning and be engaged in slide mass 2 radiused ramp 25, and clutch 31 opposite side has protruded out jack-post 312, polygonal keyway 313 is equipped with in jack-post 312, polygonal keyway 313 side is provided with clamping trough 314, the opposite side of the relatively polygonal keyway 313 of clamping trough 314 is provided with the stop surface 315 being positioned at least one arcuation inclined-plane 311 inner central, jack-post 312 clutch-adjacent 31 side is convexly equipped with and supports rank portion 316, clutch 31 side be provided with by arcuation inclined-plane 311 around and be held in the fixing pin 32 of stop surface 315, fix pin 32 side and be convexly equipped with the flexible holding division 321 snapping in nut 21 fixing slot 211, fix pin 32 opposite side and protrude out the fixing column 322 inserting clamping trough 314, fixing column 322 is arranged with and forms the urgent urgent collar 323 for itself and clamping trough 314, be arranged with one end outside jack-post 312 and be held in the elastic element 33 supporting rank portion 316, engaging and disengaging gear 3 is provided with the lid 34 covering at least one radiused ramp 25 of slide mass 2 again, lid 34 is extended with bar portion 341 away from slide mass 2 side, be provided with in bar portion 341 and groove 342 is run through to the polygonal keyway 313 of positive clutch 31, run through contiguous slide mass 2 side of groove 342 to be sequentially provided with and to support for elastic element 33 the other end and rank portion 343 can be held for supporting pushing away of rank portion 316 shift reciprocately, and supply the containing groove 344 of clutch 31 shift reciprocately.
Above-mentioned clutch 31 and the separable manufacture of fixing pin 32 assemble location again, and clutch 31 and fixing pin 32 also can one-body moldedly be made, and above-mentioned simple and easy modification and equivalent structure change, in like manner all should be contained in the scope of the claims of the present utility model, close and give Chen Ming.
The utility model is used in electric pushrod, its electric pushrod has the reducing gear of default motor and connection thereof, connect with reducing gear again and drive screw rod 1, and be covered with shell in outer cup, during normal use, connect with slide mass 2 and preset object, the radiused ramp 25 of its slide mass 2 and the arcuation inclined-plane 311 convex-concave relative bonding of clutch 31, the holding division 321 fixing pin 32 inserts the fixing slot 211 of nut 21, so when default motor drives screw rod 1 to rotate, its screw rod 1 is for rotating in original place, nut 21 cannot rotate because of fixing with the fixing pin 32 of clutch 31, then nut 21 and slide mass 2 are in bonding state, just slide mass 2 can be driven to move forward and backward on screw rod 1, just default article displacement can be driven, and elastic element 33 can push against clutch 31, fixing pin 32 is allowed really to be inserted in fixing slot 211, fix pin 32 during to prevent from normally using to depart from.
When power-off or default motor damages, what then utilize polygonal instrument 4 to insert lid 34 runs through groove 342, and allow polygonal instrument 4 correspondence insert the polygonal keyway 313 of clutch 31, just can force in polygonal instrument 4 makes it be with dynamic clutch 31 to rotate, make the radiused ramp 25 of the arcuation inclined-plane 311 of clutch 31 and slide mass 2 with protuberance relative bonding, then clutch 31 just can towards the direction displacement away from nut 21 in containing groove 344, the rank portion 316 that supports of clutch 31 just can hold rank portion 343 and to move and pressuring elastic element 33 produces resiliently deformable towards pushing away, and drive fixing pin 32 away from screw rod 1 simultaneously, the holding division 321 then fixing pin 32 will depart from the fixing slot 211 of nut 21, nut 21 and slide mass 2 are in disengaged position, allow user's manual force when default object, slide mass 2 displacement thereupon, and the nut 21 of slide mass 2 inside just can on screw rod 1 rotation displacement, because screw rod 1 need not rotate thereupon, do not need to drive default motor and reducing gear synchronization motion yet, allow and the component of synchronization motion must reduce and increase motive force with the when factor such as mechanical advantage of avoiding slowing down, can allow user is laborsaving just can promote default object, and must action because preset motor, also default motor damages can be avoided.
When stopping exerts a force to polygonal instrument 4, when elastic element 33 produces elastic reset, or when reverse turn is carried out to polygonal instrument 4 force, promote clutch 31 towards nut 21 displacement, the arcuation inclined-plane 311 of clutch 31 is guided with inclined-plane with the radiused ramp 25 of slide mass 2 and turns to convex-concave relative bonding, the holding division 321 then fixing pin 32 will insert the fixing slot 211 of nut 21, then nut 21 and slide mass 2 are replied again in bonding state, just default motor can be again allowed to operate via screw rod 1, drive and preset object with slide mass 2 displacement, if and the holding division 321 fixing pin 32 does not align the fixing slot 211 of nut 21, then holding division 321 end first can be held in nut 21 outer surface, when default motor drives screw rod 1 to operate, its nut 21 with screw rod 1 rotate to fixing slot 211 align holding division 321 time, holding division 321 just can insert in fixing slot 211.
Could open due to polygonal instrument 4 need be utilized, and its shape, external diameter and length have corresponding design, and clutch 31 is for covering by lid 34, just the specification of polygonal keyway 313 cannot be learnt, when his human desires is opened, just cannot open with the polygonal instrument 4 of correspondence, and then can anti-theft effect be promoted.
Moreover, owing to utilizing clutch 31, fixing the structure of pin 32, elastic element 33 and lid 34, the design of mode is departed from compared to screw rod and reducing gear gear, because component reduces, and the space of reducing gear and default surrounding motors can not be taken, do not take up space so simple structure of the present utility model, volume are little and do not need change design, and operation only needing to utilize polygonal instrument 4 insert to rotate, so have laborsaving, convenient and advantage fast, the utility model is installed in electric pushrod, its electric pushrod has the reducing gear of default motor and connection thereof, connect with reducing gear again and drive screw rod 1, when the load of default object exceeds electric pushrod load, presetting motor is locked rotor condition, just can raise or derive the problems such as high temperature by generation current, if cannot cut off the electricity supply in time, still can be rotated by clutch 31 in a manual manner rapidly allows nut 21 and slide mass 2 in disengaged position, load can be allowed to decline to avoid damaging default motor or reducing gear, because and non-automatic over power clutch protective gear, so eliminate sensor, starting drive and serial verb construction, be with, the utility model has the effect of reducing mechanism complexity.
Refer to shown in Fig. 1, Fig. 6, Fig. 7, Fig. 8, find out that this screw rod 1 can be general thread screw or ball screw by knowing shown in figure; And lid 34 also can set up a knob style or long-rod type hand switch 5 further, the bar portion 341 that its hand switch 5 exposes to lid 34 is outside, and hand switch 5 is connected to the polygonal keyway 313 of clutch 31, just directly dynamic clutch 31 can be with by hand switch 5, due to polygonal instrument 4 additionally must do not carried, just easy to operate effect can be had; In addition, can set up tapered end formula switch (not shown) further again at lid 34, user then can utilize corresponding key turn to be with dynamic clutch 31.
Therefore, the utility model is mainly for drive screw clutch mechanism, it comprises screw rod, slide mass and engaging and disengaging gear, and rotary clutch can be made the radiused ramp convex-concave relative bonding of itself and slide mass allow nut and slide mass be bonding state, or allow nut and slide mass be disengaged position with protuberance relative bonding, when default motor has a power failure or damage, nut and slide mass is allowed to depart from, screw rod can not rotate with the displacement of slide mass, allow user is laborsaving just can promote default object, and be not driven because preset motor, also default motor can be avoided to damage as main key protection point further, but, the foregoing is only preferred embodiment of the present utility model, non-ly therefore namely limit to the scope of the claims of the present utility model, therefore the simple and easy modification of such as using the utility model specification and graphic content to do and equivalent structure change, all should in like manner be contained in the scope of the claims of the present utility model, Chen Ming is given in conjunction.
In sum, the above-mentioned drive screw clutch mechanism of the utility model is in time using, and for really reaching its effect and object, therefore the utility model is really the creation of a practicability excellence, for meeting the application important document of utility model patent, therefore file an application, expect that careful committee grants accurate this case early, to ensure the arduous creation of creator; in accordance with the law if an ancient unit of weight office examine committee have any check doubtful, please write to us without sparing instruction, settled the doing one's utmost of creator coordinates, and true feeling moral just.
Claims (6)
1. a drive screw clutch mechanism, it comprises screw rod, slide mass and engaging and disengaging gear, it is characterized in that:
This screw rod outer surface has outside thread;
This slide mass inside has containing space, containing space both sides are provided with and are correspondingly communicated with the outside perforation that penetrates for screw rod and opening, be provided with in containing space and be placed on screw rod and the nut that can rotate, there is in nut the internal thread being engaged in external thread of screw, nut outer surface is arranged with at least one fixing slot, containing space be provided with perpendicular to perforation and opening shaft to run through groove, slide mass is equipped with at least one radiused ramp in running through the outer surface around groove;
This engaging and disengaging gear has clutch, clutch one side surface has at least one the arcuation inclined-plane aligning and be engaged in slide mass radiused ramp, and clutch opposite side has protruded out jack-post, polygonal keyway is equipped with in jack-post, clutch be provided with by arcuation inclined-plane around fixing sell, fix pin side and be convexly equipped with the flexible holding division snapping in nut fixing slot, engaging and disengaging gear is provided with the lid covering at least one radiused ramp of slide mass again, lid is extended with bar portion away from slide mass side, be provided with in bar portion and groove is run through to the polygonal keyway of positive clutch, run through the contiguous slide mass side of groove and be provided with the containing groove supplying clutch shift reciprocately.
2. drive screw clutch mechanism as claimed in claim 1, it is characterized in that: this slide mass side is provided with the cover plate covered in opening, cover plate is equipped with the multiple lock members being locked in slide mass.
3. drive screw clutch mechanism as claimed in claim 1, is characterized in that: be provided with in the containing space of this slide mass and be placed on screw rod and the rolling element being connected to nut both sides, this rolling element is bearing.
4. drive screw clutch mechanism as claimed in claim 1, it is characterized in that: the polygonal keyway side of this engaging and disengaging gear is provided with clamping trough, the opposite side of the relatively polygonal keyway of clamping trough is provided with the stop surface being positioned at least one arcuation chamfered inside central authorities, the opposite side fixing the relative holding division of pin protrudes out the fixing column inserting clamping trough, fixing column is arranged with and forms the urgent urgent collar for itself and clamping trough.
5. drive screw clutch mechanism as claimed in claim 1, it is characterized in that: the jack-post clutch-adjacent side of this engaging and disengaging gear is convexly equipped with and supports rank portion, be arranged with one end outside jack-post and be held in the elastic element supporting rank portion, lid side is run through to be provided with between groove and containing groove to support for the elastic element the other end and supply to support pushing away of rank portion shift reciprocately and is held rank portion.
6. drive screw clutch mechanism as claimed in claim 1, is characterized in that: this screw rod is thread screw or ball screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520474014.7U CN204921889U (en) | 2015-07-03 | 2015-07-03 | Drive screw clutching mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520474014.7U CN204921889U (en) | 2015-07-03 | 2015-07-03 | Drive screw clutching mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204921889U true CN204921889U (en) | 2015-12-30 |
Family
ID=54971018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520474014.7U Expired - Fee Related CN204921889U (en) | 2015-07-03 | 2015-07-03 | Drive screw clutching mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204921889U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028015A (en) * | 2021-02-26 | 2021-06-25 | 浙江赤心实业股份有限公司 | Automatic screw rod rotary device of taking off tooth |
| CN113770757A (en) * | 2020-06-09 | 2021-12-10 | 长春设备工艺研究所 | Tight device in top of quick advance and retreat screw rod |
-
2015
- 2015-07-03 CN CN201520474014.7U patent/CN204921889U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770757A (en) * | 2020-06-09 | 2021-12-10 | 长春设备工艺研究所 | Tight device in top of quick advance and retreat screw rod |
| CN113028015A (en) * | 2021-02-26 | 2021-06-25 | 浙江赤心实业股份有限公司 | Automatic screw rod rotary device of taking off tooth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20180703 |