CN210566036U - Flat chain connecting ring - Google Patents
Flat chain connecting ring Download PDFInfo
- Publication number
- CN210566036U CN210566036U CN201921459992.9U CN201921459992U CN210566036U CN 210566036 U CN210566036 U CN 210566036U CN 201921459992 U CN201921459992 U CN 201921459992U CN 210566036 U CN210566036 U CN 210566036U
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- ring
- chain
- hole
- pin hole
- pin
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Abstract
The utility model relates to a flat chain connecting ring, which comprises a first half chain ring, a second half chain ring and a limiting block, wherein the first half chain ring is provided with a first joint block and a first joint groove, the second half chain ring is provided with a second joint block and a second joint groove, the first joint groove is provided with a first air hole, the second joint groove is provided with a second air hole, the first joint block is provided with a first pin hole, the second joint block is provided with a second pin hole, and the limiting block is provided with a third pin hole; the first pin hole, the second pin hole, the third pin hole, the first air hole and the second air hole are coaxial, and the first pin hole, the second pin hole, the first air hole and the second air hole have the same diameter and are connected by a pin shaft; the first air hole and the second air hole are used as the air holes and the pin holes, so that the first half-link ring and the second half-link ring are prevented from being perforated again; the axis of the first pin hole is perpendicular to the stress direction of the flat chain connecting ring, so that the strength of the first half chain ring and the second half chain ring is improved, the opening size of the flat chain connecting ring is reduced, and the strength of the flat chain connecting ring is enhanced.
Description
Technical Field
The utility model belongs to the technical field of the chain connection technique and specifically relates to a flat chain link that connects is related to.
Background
The connecting chain ring as one kind of chain connecting device has the features of fast and stable connection, and the flat connecting chain ring is formed by splicing two half chain rings. The flat chain connecting ring is matched with the chain completely, and the flat chain connecting ring can pass through the chain wheel like the chain, so that the outer contour is almost the same as that of the chain.
At present, chinese utility model patent with publication number CN204078664U provides a take spring cushion cover's fixture block formula chain connecting ring, its structural feature connects the chain connecting ring by similar a left side, two right half chain rings and support the fixture block, the bolt, spring cushion covers constitutes, wherein spring cushion covers inlays in supporting the fixture block hole, a left side, two right half chain rings are through supporting the gomphosis of fixture block each other, spring cushion covers and is sheathes in to have a through-hole and inner wall to have annular slot, can form integrative with two left and right sides half rings supporting the fixture block through a bolt, the bolt inserts for the slope, the bolt hole on one of them half chain ring is equipped with the internal thread, the bolt hole on another half chain ring is the through-hole, and through-hole one end is.
Among the above-mentioned technical scheme, the bolt is for the slope to insert, and the bolt hole on one of them half chain ring is equipped with the internal thread, and the bolt hole on another half chain ring is the through-hole, and through-hole one end is equipped with the countersunk head, makes the trompil volume of flat formula chain ring increase, has reduced the intensity of flat formula chain ring.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flat chain link that intensity is high.
The utility model discloses the purpose that intensity is high can be realized through following technical scheme:
a flat chain connecting ring comprises a first half chain ring, a second half chain ring and a limiting block, wherein the first half chain ring is provided with a first clamping block and a first clamping groove, the second half chain ring is provided with a second clamping block and a second clamping groove, the first clamping groove is provided with a first air hole, the second clamping groove is provided with a second air hole, the first clamping block is provided with a first pin hole, the second clamping block is provided with a second pin hole, and the limiting block is provided with a third pin hole; the first pin hole, the second pin hole, the third pin hole, the first air hole and the second air hole are coaxial, the axis of the first pin hole is perpendicular to the stress direction of the flat chain connecting ring, and the first pin hole, the second pin hole, the first air hole and the second air hole are the same in diameter and are connected through pin shafts.
According to the technical scheme, when the flat chain connecting ring is butted or disassembled, the first clamping block is inserted into or pulled out of the second clamping groove, and the second clamping block is inserted into or pulled out of the first clamping groove; the first half-link ring, the second half-link ring and the limiting block are connected by the pin shaft, so that the first half-link ring, the second half-link ring and the limiting block are prevented from being separated, and the use safety of the flat connecting link ring is improved; the first pin hole, the second pin hole, the third pin hole, the first air hole and the second air hole are coaxial, so that the flat chain connecting ring only needs to be fixed by one pin shaft, and the using number of the pin shafts is reduced; first gas pocket and second gas pocket use as the gas pocket promptly and also use as the pinhole, avoided trompil once more on first half-link and second half-link, improved the intensity of first half-link and second half-link, simultaneously, only need process the through-hole on first half-link and the second half-link, the processing degree of difficulty of first half-link and second half-link has been reduced, the axle center perpendicular to flat formula of first pinhole connects the atress direction of link, the trompil volume of flat formula chain connector has been reduced, the intensity of flat chain connector has been strengthened.
Furthermore, the pin shaft is an elastic cylindrical pin.
Through the technical scheme, when the elastic cylindrical pin is mounted or dismounted, the elastic cylindrical pin is hammered into the pin hole or hammered out from the other side, so that the mounting and the dismounting are convenient; meanwhile, the flat chain connecting ring can deform after being stressed, the diameter of the elastic cylindrical pin can be reduced to be attached to the pin hole, bending deformation is not prone to occurring, the probability that the pin shaft is clamped in the pin hole is reduced, and the flat chain connecting ring is easier to disassemble.
Furthermore, the first clamping block, the first clamping groove, the second clamping block and the second clamping groove are cylindrical.
Through the technical scheme, when the first clamping block, the second clamping block, the first clamping groove and the second clamping groove are machined, only one-step forming is needed by a milling cutter, and machining is facilitated; meanwhile, the change range of the cross section sizes of the first clamping groove and the second clamping groove is reduced, the relative stress concentration coefficient is reduced, the concentrated stress applied to the first clamping groove and the second clamping groove is reduced, and the first half-chain ring and the second half-chain ring are not easy to break from the first clamping groove and the second clamping groove.
Furthermore, the first clamping block, the first clamping groove, the second clamping block and the second clamping groove are coaxial with the first air hole.
Through above-mentioned technical scheme, make first gas pocket and first joint groove department cross-sectional dimension change range little, second gas pocket and second joint groove department cross-sectional dimension change range is little, and the stress concentration coefficient to diminish, first half chain ring and the difficult disconnection of following first joint groove and second joint groove of second half chain ring.
Further, first joint piece and first semi-chain link junction and the first joint piece other end are equipped with first fillet, and second joint piece and second semi-chain link junction and the second joint piece other end are equipped with the second fillet, and the notch and the tank bottom in first joint groove are equipped with the third fillet, and the notch and the tank bottom in second joint groove are equipped with the fourth fillet.
Through above-mentioned technical scheme, because the setting at first fillet, the second fillet, third fillet and fourth fillet makes first joint piece and first half-link be the circular arc transition, and second joint piece and second half-link are the circular arc transition, has disperseed the shear stress that first joint piece and second joint piece received, make first joint piece be difficult for warping or breaking off from first half-link, and second joint piece is difficult for warping or breaking off from second half-link, has protected the inner structure of flat connector link.
Furthermore, fifth fillets are arranged at two ends of the first pin hole, sixth fillets are arranged at two ends of the second pin hole, seventh fillets are arranged at two ends of the first air hole, and eighth fillets are arranged at two ends of the second air hole.
Through the technical scheme, the change range of the section size of the half-link at the position of the air hole is reduced, the relative stress concentration coefficient is reduced, further the concentrated stress of the half-link at the position of the air hole is reduced, and the half-link is not easy to crack or break at the position of the air hole; meanwhile, the round corners are in arc transition, and the pin shaft can conveniently penetrate through the connecting part of the pin hole and the air hole.
Furthermore, the diameter of the third pin hole is larger than the diameters of the first pin hole, the second pin hole, the first air hole and the second air hole.
Through above-mentioned technical scheme, because the stopper card is back between first chain half ring and second chain half ring, the third pinhole is difficult to align with first pinhole and second pinhole, therefore the diameter of third pinhole is greater than the diameter of first pinhole, second pinhole, first gas pocket and second gas pocket, and the round pin axle of being convenient for passes through the third pinhole.
Furthermore, a plurality of third clamping grooves and a plurality of fourth clamping grooves are formed in the limiting block, a plurality of third clamping blocks are arranged on the first half-link, and a plurality of fourth clamping blocks are arranged on the second half-link; the third clamping block is clamped with the third clamping groove, and the fourth clamping block is clamped with the fourth clamping groove.
Through the technical scheme, after the limiting block is inserted between the first half-link ring and the second half-link ring, the third clamping block and the fourth clamping block are inserted into the third clamping groove, so that the first half-link ring and the second half-link ring are not easy to rotate along the pin holes, and the structural stability of the flat-type connecting link ring is improved; meanwhile, when the limiting block is inserted between the first half-chain ring and the second half-chain ring, the third pin hole is more easily butted with the first pin hole and the second pin hole, and the installation of the elastic cylindrical pin is further facilitated.
Furthermore, the limiting block is cylindrical, and a groove with a semicircular section is formed in the peripheral side surface of the limiting block along the circumferential direction of the limiting block.
Through the technical scheme, after the flat chain connecting ring is connected with the iron chain, the iron chain rotates along the flat chain connecting ring, so that the connecting effect of the device is improved, the abrasion of the iron chain and the flat chain connecting ring is reduced, and the service life of the flat chain connecting ring and the iron chain is prolonged.
To sum up, with current technical contrast, the beneficial effects of the utility model are as follows:
1. the first pin hole, the second pin hole, the third pin hole, the first air hole and the second air hole are coaxial, the diameters of the first pin hole, the second pin hole, the first air hole and the second air hole are the same, and the first pin hole, the second pin hole, the first air hole and the second air hole are connected through the elastic cylindrical pin, so that the number of holes formed in the flat chain connecting ring is reduced, and the strength of the flat chain connecting ring is improved;
2. the first clamping block, the second clamping block, the first clamping groove and the second clamping groove are provided with the fillets, so that stress concentration is reduced, the strength of the first half-chain ring and the second half-chain ring is improved, the use reliability of the flat half-chain ring is improved, and the service life of the flat half-chain ring is prolonged;
3. the round corners are arranged on the first pin hole, the second pin hole, the first air hole and the second air hole, so that the elastic cylindrical pin can conveniently penetrate through the connecting part of the pin hole and the air hole, and the installation is more convenient.
Drawings
FIG. 1 is a schematic view of the overall structure and appearance of the present invention;
3 FIG. 32 3 is 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 31 3; 3
Fig. 3 is a schematic partial exploded view of fig. 2.
Reference numerals: 1. a first half link; 11. a first clamping block; 111. a first rounded corner; 12. a first clamping groove; 121. a second rounded corner; 13. a first air hole; 131. a seventh fillet; 14. a first pin hole; 141. a fifth fillet; 15. a third clamping block; 2. a second half link; 21. a second clamping block; 211. a third fillet; 22. a second clamping groove; 221. a fourth fillet; 23. a second air hole 231, an eighth round corner; 24. a second pin hole; 241. a sixth fillet; 25. a fourth clamping block; 3. a limiting block; 31. a third pin hole; 32. a third clamping groove; 33. a fourth clamping groove; 4. and the elastic cylindrical pin.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the flat chain connecting ring comprises a first half chain ring 1, a second half chain ring 2, a limiting block 3 and an elastic cylindrical pin 4; the first half-chain ring 1 is butted with the second half-chain ring 2, then the limiting block 3 is inserted between the first half-chain ring 1 and the second half-chain ring 2, and then the elastic cylindrical pin 4 is inserted.
Referring to fig. 2, the limiting block 3 is cylindrical, and a groove with a semicircular cross section is formed on the circumferential side surface of the limiting block along the circumferential direction of the limiting block, so that the limiting block 3 has a structure with a thin middle part, thick two ends and a middle arc transition.
After the limiting block 3 is inserted between the first half chain ring 1 and the second half chain ring 2, the inner ring of the flat chain connecting ring is divided into two sections, so that an iron chain is prevented from excessively sliding in the inner ring, the stress direction of the flat chain connecting ring is changed, the flat chain connecting ring is enabled to be stressed in the optimal stress direction, and the service life of the flat chain connecting ring is prolonged; meanwhile, the inner rings at the two ends of the flat chain connecting ring are in arc transition, and the inner rings are inclined to the iron chain and rotate along the flat chain connecting ring, so that the connecting effect of the device is improved, the abrasion of the iron chain and the flat chain connecting ring is reduced, and the service life of the flat chain connecting ring and the iron chain is prolonged.
Referring to fig. 2 and 3, a plurality of third clamping grooves 32 are formed in the limiting block 3, a plurality of third clamping blocks 15 are formed in the first half-link 1, and a plurality of fourth clamping blocks 25 are formed in the second half-link 2; after the limiting block 3 is inserted between the first half-link ring 1 and the second half-link ring 2, the third clamping block 15 and the fourth clamping block 25 are inserted into the third clamping groove 32, so that the first half-link ring 1 and the second half-link ring 2 are not easy to rotate along the axis of the first pin hole 14, and the structural stability of the flat-type connecting link ring is improved; meanwhile, when the limiting block 3 is inserted between the first half-link ring 1 and the second half-link ring 2, the third pin hole 31 is more easily butted with the first pin hole 14 and the second pin hole 24, and the installation of the elastic cylindrical pin 4 is further facilitated.
First joint piece 11 and first joint groove 12 are equipped with on the first half link 11, and second half link 2 is equipped with second joint piece 21 and second joint groove 22, and first joint piece 11, first joint groove 12, second joint piece 21 and second joint groove 22 are cylindrical. Because the first clamping groove 12 and the second clamping groove 22 are cylindrical, the change range of the cross section sizes of the first clamping groove 12 and the second clamping groove 22 is reduced, the relative stress concentration coefficient is reduced, and the first half-link ring 1 and the second half-link ring 2 are not easy to break from the first clamping groove 12 and the second clamping groove 22.
First joint piece 11 is equipped with first fillet 111 with first semi-chain ring 1 junction and the first joint piece 11 other end, and second joint piece 21 is equipped with third fillet 211 with second semi-chain ring 2 junction and the second joint piece 21 other end, and the notch and the tank bottom of first joint groove 12 are equipped with second fillet 121, and the notch and the tank bottom of second joint groove 22 are equipped with fourth fillet 221. Because the setting of first fillet 111 and third fillet 211 makes first joint piece 11 be the circular arc transition with first semi-chain ring 1, second joint piece 21 is the circular arc transition with second semi-chain ring 2, the shear stress that first joint piece 11 and second joint piece 21 received has been disperseed, make first joint piece 11 be difficult for warping or breaking off from first semi-chain ring 1, second joint piece 21 is difficult for warping or breaking off from second semi-chain ring 2, the inner structure of flat formula chain ring has been protected.
The first clamping groove 12 is provided with a first air hole 13, the second clamping groove 22 is provided with a second air hole 23, the first air hole 13 and the first clamping groove 12 are coaxial, and the second air hole 23 and the second clamping groove 22 are coaxial. Due to the arrangement of the first air hole 13 and the second air hole 23, when the flat chain connecting ring is butted, the first clamping block 11 is inserted into the second clamping groove 22, the second clamping block 21 is inserted into the first clamping groove 12, and air in the first clamping groove 12 and the second clamping groove 22 is exhausted through the air holes; when the flat chain connecting ring is disassembled, the first clamping block 11 is pulled out from the second clamping groove 22, the second clamping block 21 is pulled out from the first clamping groove 12, and air enters the first clamping groove 12 and the second clamping groove 22 through air holes; thus avoiding the generation of cavity phenomenon and facilitating the installation and the disassembly of the flat chain connecting ring.
The first air hole 13 and the first clamping groove 12 are coaxial, the second air hole 23 and the second clamping groove 22 are coaxial, so that the change range of the section size of the first air hole 13 and the first clamping groove 12 is small, the change range of the section size of the second air hole 23 and the second clamping groove 22 is small, the stress concentration coefficient of the first air hole 13 and the second air hole 23 is small, and the first half-link ring 1 and the second half-link ring 2 are not easily disconnected from the first air hole 13 and the second air hole 23.
First joint piece 11 is last to be equipped with first pinhole 14, is equipped with second pinhole 24 on the second joint piece 21, is equipped with third pinhole 31 on the stopper 3, and first pinhole 14, second pinhole 24, third pinhole 31, first gas pocket 13 and second gas pocket 23 set up with the axle center after the butt joint, and first pinhole 14, second pinhole 24, first gas pocket 13 are the same with second gas pocket 23 diameter, and the diameter of third pinhole 31 is greater than first pinhole 14, and the round pin axle uses elasticity cylindric lock 4.
The first pin hole 14, the second pin hole 24, the third pin hole 31, the first air hole 13 and the second air hole 23 are coaxial, so that the flat connecting link is fixed only by using one elastic cylindrical pin 4, and the using number of the elastic cylindrical pins 4 is reduced; the first air hole 13 and the second air hole 23 are used as air holes and also used as pin holes, so that the first half-link ring 1 and the second half-link ring 2 are prevented from being opened again, the strength of the first half-link ring 1 and the second half-link ring 2 is improved, and the processing difficulty of the first half-link ring 1 and the second half-link ring 2 is reduced.
After the limiting block 3 is clamped between the first half-link ring 1 and the second half-link ring 2, the third pin hole 31 is not easy to align with the first pin hole 14 and the second pin hole 24, so that the diameter of the third pin hole 31 is larger than the diameters of the first pin hole 14, the second pin hole 24, the first air hole 13 and the second air hole 23, and the elastic cylindrical pin 4 can conveniently pass through the third pin hole 31.
When the elastic cylindrical pin 4 is mounted and dismounted, the elastic cylindrical pin 4 is hammered into the pin hole or the elastic cylindrical pin 4 is hammered out from the other side, so that the mounting and the dismounting are convenient; meanwhile, the flat chain connecting ring can deform after being stressed, the elastic cylindrical pin 4 can reduce the diameter and keep fit with the pin hole, and is not easy to bend and deform, so that the probability that the pin shaft is clamped in the pin hole is reduced, and the flat chain connecting ring is easier to disassemble.
Meanwhile, the first half-chain ring 1 and the second half-chain ring 2 can be completely the same in structure, so that the production cost is saved, and the purchasing pressure and the storage pressure of a user can be reduced.
The implementation principle of the embodiment is as follows:
when the flat chain connecting ring is installed, the first clamping block 11 is inserted into the second clamping groove 22, the second clamping block 21 is inserted into the first clamping groove 12, and the first half chain ring 1 and the second half chain ring 2 are butted to form the flat chain connecting ring; then the limiting block 3 is inserted between the first half-chain ring 1 and the second half-chain ring 2 along the third clamping groove 32, and finally the elastic cylindrical pin 4 is inserted to fix the flat type chain connecting ring.
When the flat chain connecting ring is disassembled, the installation steps are reversed.
The first pin hole 14, the second pin hole 24, the third pin hole 31, the first air hole 13 and the second air hole 23 are coaxial, so that the flat connecting chain ring only needs to be fixed by one pin shaft, and the using number of the pin shafts is reduced; the first air hole 13 and the second air hole 23 are used as air holes and also used as pin holes, so that the first half-chain ring 1 and the second half-chain ring 2 are prevented from being opened with holes again, the strength of the first half-chain ring 1 and the second half-chain ring 2 is improved, meanwhile, the axis of the first pin hole 14 is perpendicular to the stress direction of the flat chain connecting ring, the opening size of the flat chain connecting ring is reduced, and the strength of the flat chain connecting ring is enhanced.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. A flat chain connecting ring comprises a first half chain ring (1), a second half chain ring (2) and a limiting block (3), wherein the first half chain ring (1) is provided with a first clamping block (11) and a first clamping groove (12), the second half chain ring (2) is provided with a second clamping block (21) and a second clamping groove (22), the flat chain connecting ring is characterized in that the first clamping groove (12) is provided with a first air hole (13), the second clamping groove (22) is provided with a second air hole (23), the first clamping block (11) is provided with a first pin hole (14), the second clamping block (21) is provided with a second pin hole (24), and the limiting block (3) is provided with a third pin hole (31); the first pin hole (14), the second pin hole (24), the third pin hole (31), the first air hole (13) and the second air hole (23) are coaxial, the axial center of the first pin hole (14) is perpendicular to the stress direction of the flat chain connecting ring, and the first pin hole (14), the second pin hole (24), the first air hole (13) and the second air hole (23) are the same in diameter and are connected through a pin shaft.
2. A plain chain connector as claimed in claim 1, wherein the pin is a resilient cylindrical pin (4).
3. The flat chain ring according to claim 1, wherein the first engaging block (11), the first engaging groove (12), the second engaging block (21) and the second engaging groove (22) are cylindrical.
4. The flat chain ring according to claim 2, wherein the first engaging block (11), the first engaging groove (12), the second engaging block (21) and the second engaging groove (22) are coaxial with the first air hole (13).
5. The flat chain connector according to claim 3, wherein a first fillet (111) is arranged at the joint of the first clamping block (11) and the first half-chain ring (1) and at the other end of the first clamping block (11), a second fillet (121) is arranged at the joint of the second clamping block (21) and the second half-chain ring (2) and at the other end of the second clamping block (21), a third fillet (211) is arranged at the groove opening and the groove bottom of the first clamping groove (12), and a fourth fillet (221) is arranged at the groove opening and the groove bottom of the second clamping groove (22).
6. A plain end ring according to claim 1, wherein the first pin hole (14) is provided with a fifth fillet (141) at each end, the second pin hole (24) is provided with a sixth fillet (241) at each end, the first air hole (13) is provided with a seventh fillet (131) at each end, and the second air hole (23) is provided with an eighth fillet (231) at each end.
7. A plain chain ring according to claim 1, wherein the diameter of the third pin hole (31) is larger than the diameter of the first pin hole (14), the second pin hole (24), the first air hole (13) and the second air hole (23).
8. The flat chain ring according to claim 1, wherein a plurality of third clamping grooves (32) and a plurality of fourth clamping grooves (33) are arranged on the limiting block (3), a plurality of third clamping blocks (15) are arranged on the first half chain ring (1), and a plurality of fourth clamping blocks (25) are arranged on the second half chain ring (2); the third clamping block (15) is clamped with the third clamping groove (32), and the fourth clamping block (25) is clamped with the fourth clamping groove (33).
9. A plain chain ring according to claim 1, wherein the stopper (3) is cylindrical and has a peripheral side surface which is grooved with a semicircular cross-section along its circumferential length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921459992.9U CN210566036U (en) | 2019-09-04 | 2019-09-04 | Flat chain connecting ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921459992.9U CN210566036U (en) | 2019-09-04 | 2019-09-04 | Flat chain connecting ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210566036U true CN210566036U (en) | 2020-05-19 |
Family
ID=70627392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921459992.9U Expired - Fee Related CN210566036U (en) | 2019-09-04 | 2019-09-04 | Flat chain connecting ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210566036U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112621117A (en) * | 2020-12-08 | 2021-04-09 | 莱芜钢铁集团淄博锚链有限公司 | Anchor chain kenter processing method |
| CN113446357A (en) * | 2021-06-30 | 2021-09-28 | 山西中科玄武科技有限公司 | Basalt composite material heavy machinery is with dismantling chain ring |
-
2019
- 2019-09-04 CN CN201921459992.9U patent/CN210566036U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112621117A (en) * | 2020-12-08 | 2021-04-09 | 莱芜钢铁集团淄博锚链有限公司 | Anchor chain kenter processing method |
| CN113446357A (en) * | 2021-06-30 | 2021-09-28 | 山西中科玄武科技有限公司 | Basalt composite material heavy machinery is with dismantling chain ring |
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Legal Events
| 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: 20200519 Termination date: 20210904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |