CN213387548U - Telescopic boom connecting structure - Google Patents
Telescopic boom connecting structure Download PDFInfo
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- CN213387548U CN213387548U CN202021845759.7U CN202021845759U CN213387548U CN 213387548 U CN213387548 U CN 213387548U CN 202021845759 U CN202021845759 U CN 202021845759U CN 213387548 U CN213387548 U CN 213387548U
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- shaft hole
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Abstract
The utility model discloses a flexible arm connection structure, include: the telescopic arm and the connecting frame are provided with pin shaft holes, after the pin shaft holes on the connecting frame and the pin shaft holes on the telescopic arm are aligned up and down, the part is fixedly arranged on the telescopic arm after an anti-rotation pin shaft penetrates through the two pin shaft holes aligned up and down and is fixed; the mounted telescopic arm can freely slide in the basic arm under the power action of the telescopic oil cylinder. The utility model discloses a welding alone takes shape's roof beam shape link, this roof beam shape link is through preventing changeing round pin axle fixed mounting in flexible arm, has solved that the link is uneven, the easy fracture of flexible arm atress that exists in flexible arm through the welding mode welding among the prior art scheme influences cantilever crane bulk strength and life-span, and the link dismouting is inconvenient, the later stage maintenance scheduling problem of being not convenient for.
Description
Technical Field
The utility model relates to a flexible arm technical field, concretely relates to flexible arm connection structure.
Background
The telescopic boom support is widely applied to the field of engineering machinery, generally comprises a basic boom, a telescopic oil cylinder, a connecting structure and one or more telescopic booms, wherein the basic boom is arranged on a rack, the telescopic boom can slide and stretch along the basic boom, and the telescopic boom can retract into the basic boom when not in work and extend out to expand the working range when in work. At present, the connection forms of the telescopic arm support are mainly two types:
Scheme 2 as shown in fig. 2-5, the connecting frame 14 is formed by welding an end plate 141, a panel 142 and a rib plate 143, the connecting frame 14 is connected to the telescopic arm 12 through pins 17 and 18, the connecting frame 14 is connected to the head of the telescopic oil cylinder 13 through a pin 15, the tail of the telescopic oil cylinder 13 is connected to the basic arm 11 through a pin, and the telescopic arm 12 can slide in the basic arm 11 through the extension and contraction of the telescopic oil cylinder 13, so that the extension and contraction of the whole arm support are realized.
However, the above schemes 1 and 2 have the following disadvantages:
scheme 1: (1) when the connecting frame 4 is welded, the upper and lower panels and the web plate of the telescopic arm 2 are required to be provided with process holes, so that the integrity and stress distribution of the upper and lower panels are changed, and the upper and lower panels are main stress parts and are easy to fatigue crack in the reciprocating telescopic process; (2) the connecting frame 4 is directly welded on the upper plate and the lower plate of the telescopic arm 2, and the upper plate 7 and the lower plate 6 are taken as main stress parts to easily generate welding stress concentration to cause cracking, so that potential safety hazards exist; (3) the head of the telescopic oil cylinder 3 needs to be assembled in the inner cavity of the telescopic arm 2, so that the assembly is inconvenient, the efficiency is affected, and the later maintenance is inconvenient;
scheme 2: (1) during assembly, the auxiliary pin shaft 18 needs to be assembled besides the necessary pin shafts 17 and 15, so that the assembly is complicated and the production efficiency is influenced; (2) the connecting frame 14 needs to process a group of holes on the end plate 141, the panel 142 and the rib plate 143 respectively, so that the welding workload is large, the processing is complex, and the production efficiency is influenced; (3) the pin shaft 17 is a long shaft, so that the disassembly is inconvenient during maintenance, and the maintenance is inconvenient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flexible arm connection structure can carry out flexible arm control.
To achieve the purpose, the utility model adopts the following technical proposal:
there is provided a telescopic arm connecting structure including: the telescopic arm and the connecting frame are provided with pin shaft holes, after the pin shaft holes on the connecting frame and the pin shaft holes on the telescopic arm are aligned up and down, the part is fixedly arranged on the telescopic arm after an anti-rotation pin shaft penetrates through the two pin shaft holes aligned up and down and is fixed; the mounted telescopic arm can freely slide in the basic arm under the power action of the telescopic oil cylinder.
Preferably, the head position department of flexible hydro-cylinder sets up a first round pin shaft hole that link up from top to bottom, set up the second round pin shaft hole that link up from top to bottom on the link, flexible hydro-cylinder with the link passes through a round pin axle first round pin shaft hole with second round pin shaft hole is fixed, realizes flexible hydro-cylinder with the fixed connection of link.
Preferably, the connecting frame comprises an end plate, a rib plate and a panel, the end plate is arranged at the end edge of the upper end or the lower end of the panel, the rib plate is arranged on the panel, the second pin shaft hole is arranged on the panel, the rib plate is arranged between the end plate and the second pin shaft hole, the pin shaft hole is arranged on the rib plate, and the anti-rotation pin shaft penetrates through the pin shaft hole arranged on the rib plate, penetrates through the pin shaft hole arranged on the telescopic arm and is fixed, and then the part is fixedly arranged on the telescopic arm.
Preferably, the end plates comprise a first end plate and a second end plate, the first end plate is arranged at the upper end edge of the panel, and the second end plate is arranged at the lower end edge of the panel; the rib plates comprise a first rib plate and a second rib plate, the first rib plate is arranged between the first end plate and the second pin shaft hole, and the second rib plate is arranged between the second end plate and the second pin shaft hole.
Preferably, the anti-rotation pin shaft comprises a first anti-rotation pin shaft and a second anti-rotation pin shaft, and the first anti-rotation pin shaft penetrates through the pin shaft hole formed in the first rib plate, penetrates through the pin shaft hole formed in the telescopic arm and is fixed, and then the part mounting member is fixedly mounted on the telescopic arm;
and the second anti-rotation pin shaft penetrates through the pin shaft hole formed in the second rib plate and penetrates through the pin shaft hole formed in the telescopic arm and is fixed, and then the part mounting part is fixedly mounted on the telescopic arm.
Preferably, the end plate is welded with a shaft sleeve, the shaft sleeve is provided with a pin shaft hole which is through up and down, the telescopic boom is also provided with a pin shaft hole which can be aligned with the pin shaft hole arranged on the shaft sleeve up and down, and an anti-rotation pin shaft penetrates through the pin shaft hole arranged on the shaft sleeve and penetrates through the pin shaft hole arranged on the telescopic boom and is fixedly arranged on the telescopic boom.
Preferably, the rotation-preventing pin shaft is a rotation-preventing pin shaft with a key, the pin shaft hole is a key groove, and the part and the telescopic arm are fixedly mounted by assembling the key arranged on the rotation-preventing pin shaft into the corresponding key groove.
Preferably, the rotation-preventing pin shaft is a chamfered shaft, the pin shaft hole is a waist-shaped hole, and the fixed installation of the part mounting part and the telescopic arm is realized by fixing the chamfered shaft in the corresponding waist-shaped hole.
Preferably, a connection line of three points of a center point of the pin shaft hole formed in the first rib plate, a center point of the pin shaft hole formed in the second rib plate, and a center point of the second pin shaft hole formed in the panel is perpendicular to a horizontal line.
Preferably, the three-point connection after extending up and down is used as a cutting line for cutting the panel left and right, and after the panel is cut into a left panel and a right panel, the area of the right panel is larger than that of the left panel.
Preferably, the section of the anti-rotation pin shaft is in a step shape.
Preferably, a flitch is welded on the inner wall of a web plate of the telescopic arm, and the anti-rotation pin shaft is arranged in contact with the flitch.
Preferably, the key of the anti-rotation pin shaft is formed by bending along the circumferential direction, the structure of the key groove is matched with the key of the anti-rotation pin shaft, and the anti-rotation pin shaft is assembled in the key groove through the key arranged on the anti-rotation pin shaft.
The utility model discloses a welding alone takes shape's roof beam shape link, this roof beam shape link is through preventing changeing round pin axle fixed mounting in flexible arm, has solved that the link is uneven, the easy fracture of flexible arm atress that exists in flexible arm through the welding mode welding among the prior art scheme influences cantilever crane bulk strength and life-span, and the link dismouting is inconvenient, the later stage maintenance scheduling problem of being not convenient for.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic view of a conventional telescopic boom connecting structure;
fig. 2 is a schematic view of another existing telescopic boom connecting structure;
fig. 3 is a schematic structural view illustrating that the connection frame of the telescopic boom connection structure provided in fig. 2 is installed inside a telescopic boom;
fig. 4 is a front view of a connection frame in the telescopic boom connection structure provided in fig. 2;
fig. 5 is a side view of a connection frame in the telescopic boom connection structure provided in fig. 2;
fig. 6 is a schematic view of a telescopic arm connection structure according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view illustrating a connection frame installed in a telescopic boom connection structure according to an embodiment of the present invention;
fig. 8 is a schematic view of an internal structure of a telescopic boom in the telescopic boom connection structure according to an embodiment of the present invention;
fig. 9 is a schematic cross-sectional view of a connection frame according to an embodiment of the present invention;
fig. 10 is a schematic structural view of an anti-rotation pin according to an embodiment of the present invention;
fig. 11 is a top view or a bottom view of an upper end surface or a lower end surface of a connection frame according to a new embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 6 shows a schematic view of a telescopic boom connection structure provided by an embodiment of the present invention, fig. 7 shows a schematic cross-sectional view of a connection frame in a telescopic boom connection structure provided by an embodiment of the present invention, as shown in fig. 6 and 7, the telescopic boom connection structure includes: the telescopic arm 22 and a part assembly formed by mutually connecting the telescopic oil cylinder 23 and the connecting frame 24 are provided with pin shaft holes, after the pin shaft hole on the connecting frame 24 and the pin shaft hole on the telescopic arm 22 are vertically aligned, the part assembly is fixedly arranged on the telescopic arm 22 after the part assembly passes through the two vertically aligned pin shaft holes through an anti-rotation pin shaft 27 and is fixed; the mounted telescopic arm 22 can slide freely in the base arm 21 under the power of the telescopic cylinder 23.
During the extension and retraction of the telescopic arm 22, the force of the telescopic cylinder 23 directly acts on the telescopic arm 22 through the connecting frame 24 and the rotation-preventing pin 27, so that the telescopic arm 22 can freely slide in the base arm 21.
Regarding the specific fixing manner of the telescopic cylinder and the connecting frame, as shown in fig. 7, a first pin shaft hole penetrating up and down is formed at the head position of the telescopic cylinder 23, a second pin shaft hole penetrating up and down is formed on the connecting frame 24, and the telescopic cylinder 23 and the connecting frame 24 pass through the first pin shaft hole and the second pin shaft hole through a pin shaft 25 and are fixed, so that the fixed connection of the telescopic cylinder 23 and the connecting frame 24 is realized.
Fig. 9 shows a schematic cross-sectional view of the connecting frame provided in this embodiment, as shown in fig. 9, the connecting frame 24 includes an end plate 241, a rib plate 243 and a panel 244, the end plate 241 is disposed at an end edge of an upper end or a lower end of the panel 244, the rib plate 243 is disposed on the panel 244, a second pin shaft hole 245 is disposed on the panel 244, the rib plate 243 is disposed between the end plate 241 and the second pin shaft hole 245, a pin shaft hole is disposed on the rib plate 243, and the anti-rotation pin 27 passes through the pin shaft hole disposed on the rib plate 243 and the pin shaft hole disposed on the telescopic arm 22 and is fixed, and then the component is fixedly mounted on the telescopic arm 22.
In this embodiment, the end plate 241, the rib plate 243 and the face plate 244 are welded to form the connecting frame 24.
As shown in fig. 9, the end plate 241 includes a first end plate 2411 and a second end plate 2412, the first end plate 2411 is disposed at the upper end edge of the face plate 244, and the second end plate 2412 is disposed at the lower end edge of the face plate 244; the rib plate 243 includes a first rib plate 2431 and a second rib plate 2432, the first rib plate 2431 being disposed between the first end plate 2411 and the second pin shaft hole 245, and the second rib plate 2432 being disposed between the second end plate 2412 and the second pin shaft hole 245.
As shown in fig. 9, the anti-rotation pin 27 includes a first anti-rotation pin 271 and a second anti-rotation pin 272, and after the first anti-rotation pin 271 passes through a pin hole formed in the first rib plate 2431 and a pin hole formed in the telescopic boom 22 and is fixed, the component is fixedly mounted on the telescopic boom 22;
the second rotation-preventing pin 272 passes through a pin hole provided in the second rib plate 2432 and passes through a pin hole provided in the telescopic boom 22, and after fixing, the component is fixedly mounted on the telescopic boom 22.
In order to increase the contact area between the connecting frame and the rotation-preventing pin shaft and reduce the stress of the connecting frame, as shown in fig. 9, it is preferable that a shaft sleeve 242 is welded to the end plate 241, a pin shaft hole penetrating up and down is formed in the shaft sleeve 242, a pin shaft hole capable of aligning up and down with the pin shaft hole formed in the shaft sleeve 242 is also formed in the telescopic arm 22, and the rotation-preventing pin shaft 27 passes through the pin shaft hole formed in the shaft sleeve 242 and the pin shaft hole formed in the telescopic arm 22 and is fixed, and then the component is fixedly mounted on the telescopic arm 22 to prevent the component from rotating relative to the telescopic arm 22.
For the convenience of installation, the rotation-preventing pin shaft 27 is a rotation-preventing pin shaft with a key, the pin shaft hole is a key groove, and the fixed installation of the part mounting part and the telescopic arm 22 is realized by assembling the key arranged on the rotation-preventing pin shaft 27 into the corresponding key groove. Specifically, the key on the anti-rotation pin 27 provided in this embodiment is formed by bending along the circumferential direction, for example, the key may be bent 180 ° along the circumferential direction and then be "U" shaped, and the "U" shaped key may be inserted into the key slot matching with the "U" shaped key, so as to fix the component on the telescopic arm through the anti-rotation pin 27. In order to increase the fixing strength of the fitting and the telescopic arm, more preferably, the number of keys provided on the rotation-preventing pin shaft 27 may be plural. Correspondingly, the key grooves formed in the telescopic arm and the connecting frame are also multiple, and each key arranged on the rotation-preventing pin shaft 27 is assembled in the corresponding key groove, so that the part and the telescopic arm are firmly installed. In this embodiment, the structure of the key groove is not limited, and the structure of the key groove is matched with the key on the rotation-preventing pin shaft 27, so that the key on the rotation-preventing pin shaft 27 can be fixedly installed in the key groove.
Alternatively, the rotation-preventing pin 27 is a chamfered shaft, the pin hole is a waist-shaped hole, and the fixing of the part fitting and the telescopic arm 22 is realized by fixing the chamfered shaft in the corresponding waist-shaped hole.
In order to ensure that the connecting frame 24 and the rotation-preventing pin 27 are uniformly stressed when the telescopic cylinder 23 is telescopic, in this embodiment, it is preferable that a connection line of three points, which is a central point of the pin hole formed in the first rib plate, a central point of the pin hole formed in the second rib plate, and a central point of the second pin hole formed in the panel 244, is perpendicular to a horizontal line.
Since the thrust of the telescopic cylinder 23 when the telescopic arm 22 extends out is greater than the tension of the telescopic cylinder when the telescopic arm 22 retracts, in order to ensure the strength of the connecting frame 24 to be sufficient and to ensure the stability of the telescopic cylinder 23 during extension and retraction, in this embodiment, an extension line of a three-point connecting line of the three central points extending up and down is used as a cutting line for cutting the left and right panels 244, and after the panel 244 is cut into the left and right panels, the area of the right panel is greater than that of the left panel.
Fig. 10 shows a schematic structural view of the rotation-preventing pin used in the present embodiment, and as shown in fig. 10, the section of the rotation-preventing pin 27 is stepped. Specifically, the anti-rotation pin 27 is a stepped shaft with double keyways, the double keyways are uniformly arranged along 180 degrees of the circumference, and the stepped shaft ensures that the anti-rotation pin 27 can still be assembled on the connecting frame 24 through the shaft hole of the telescopic arm 22 under the condition that the key is assembled in advance.
Fig. 8 shows the internal structure of the telescopic arm, and as shown in fig. 8 and 7, a flitch 222 is welded on the inner wall of the web 221 of the telescopic arm 22, and the rotation-preventing pin 27 is arranged in contact with the flitch 222. The attachment plate 222 can increase the strength of the web plate 221, increase the contact area of the telescopic arm 22 and the anti-rotation pin shaft 27, reduce the telescopic stress of the telescopic arm 22, limit the left and right positions of the connecting frame 24 and prevent the connecting frame 24 from shaking in the telescopic arm.
The utility model discloses a welding alone takes shape's roof beam shape link, this roof beam shape link is through preventing changeing round pin axle fixed mounting in flexible arm, has solved that the link is uneven, the easy fracture of flexible arm atress that exists in flexible arm through the welding mode welding among the prior art scheme influences cantilever crane bulk strength and life-span, and the link dismouting is inconvenient, the later stage maintenance scheduling problem of being not convenient for.
It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.
Claims (13)
1. A telescopic arm connecting structure, comprising: the telescopic arm and the connecting frame are provided with pin shaft holes, after the pin shaft holes on the connecting frame and the pin shaft holes on the telescopic arm are aligned up and down, the part is fixedly arranged on the telescopic arm after an anti-rotation pin shaft penetrates through the two pin shaft holes aligned up and down and is fixed; the mounted telescopic arm can freely slide in the basic arm under the power action of the telescopic oil cylinder.
2. The telescopic boom connecting structure according to claim 1, wherein a first pin shaft hole penetrating up and down is formed at a head position of the telescopic cylinder, a second pin shaft hole penetrating up and down is formed on the connecting frame, and the telescopic cylinder and the connecting frame pass through the first pin shaft hole and the second pin shaft hole through a pin shaft and are fixed, so that the telescopic cylinder and the connecting frame are fixedly connected.
3. The telescopic boom connecting structure according to claim 2, wherein the connecting frame comprises an end plate, a rib plate and a panel, the end plate is arranged at the edge of the end part of the upper end or the lower end of the panel, the rib plate is arranged on the panel, the second pin shaft hole is arranged on the panel, the rib plate is arranged between the end plate and the second pin shaft hole, the pin shaft hole is arranged on the rib plate, and the anti-rotation pin shaft penetrates through the pin shaft hole arranged on the rib plate, penetrates through the pin shaft hole arranged on the telescopic boom and is fixed, and then fixedly mounts the part on the telescopic boom.
4. The telescopic arm connection structure according to claim 3, wherein the end plate includes a first end plate provided at an upper end edge of the face plate and a second end plate provided at a lower end edge of the face plate; the rib plates comprise a first rib plate and a second rib plate, the first rib plate is arranged between the first end plate and the second pin shaft hole, and the second rib plate is arranged between the second end plate and the second pin shaft hole.
5. The telescopic boom connecting structure according to claim 4, wherein the rotation-preventing pin shaft includes a first rotation-preventing pin shaft and a second rotation-preventing pin shaft, and the first rotation-preventing pin shaft passes through the pin shaft hole provided in the first rib plate and the pin shaft hole provided in the telescopic boom and is fixed, and then the component is fixedly mounted on the telescopic boom;
and the second anti-rotation pin shaft penetrates through the pin shaft hole formed in the second rib plate and penetrates through the pin shaft hole formed in the telescopic arm and is fixed, and then the part mounting part is fixedly mounted on the telescopic arm.
6. The telescopic boom connecting structure according to claim 3 or 5, wherein a shaft sleeve is welded to the end plate, the shaft sleeve is provided with a pin shaft hole which is through from top to bottom, the telescopic boom is also provided with a pin shaft hole which can be aligned with the pin shaft hole provided in the shaft sleeve from top to bottom, and the anti-rotation pin shaft penetrates through the pin shaft hole provided in the shaft sleeve and the pin shaft hole provided in the telescopic boom and is fixed, and then the component is fixedly mounted on the telescopic boom.
7. The telescopic arm connecting structure according to claim 1, wherein the rotation-preventing pin is a rotation-preventing pin with a key, the pin hole is a key groove, and the fixed mounting of the component and the telescopic arm is achieved by fitting a key provided on the rotation-preventing pin into the corresponding key groove.
8. The telescopic arm connecting structure according to claim 1, wherein the rotation-preventing pin shaft is a chamfered shaft, the pin shaft hole is a waist-shaped hole, and the fixing of the part fitting and the telescopic arm is achieved by fixing the chamfered shaft in the corresponding waist-shaped hole.
9. The telescopic boom connecting structure according to claim 5, wherein a three-point connecting line of a center point of the pin shaft hole provided in the first rib plate, a center point of the pin shaft hole provided in the second rib plate, and a center point of the second pin shaft hole provided in the panel is perpendicular to a horizontal line.
10. The telescopic arm connecting structure according to claim 9, wherein the three-point connection extending in the up-down direction is used as a cutting line for cutting the panel in the left-right direction, and the area of the right panel is larger than that of the left panel after the panel is cut into the left panel and the right panel.
11. The telescopic arm connecting structure according to claim 1, wherein the rotation-preventing pin has a stepped cross section.
12. The telescopic arm connecting structure according to claim 1, wherein a flitch is welded to an inner wall of a web plate of the telescopic arm, and the rotation-preventing pin shaft is arranged in contact with the flitch.
13. The boom linkage of claim 7, wherein the key of the rotation-preventing pin shaft is formed by bending in a circumferential direction, the key groove has a structure matching with the key of the rotation-preventing pin shaft, and the rotation-preventing pin shaft is fitted in the key groove through the key provided thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021845759.7U CN213387548U (en) | 2020-08-30 | 2020-08-30 | Telescopic boom connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021845759.7U CN213387548U (en) | 2020-08-30 | 2020-08-30 | Telescopic boom connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213387548U true CN213387548U (en) | 2021-06-08 |
Family
ID=76212137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021845759.7U Active CN213387548U (en) | 2020-08-30 | 2020-08-30 | Telescopic boom connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213387548U (en) |
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2020
- 2020-08-30 CN CN202021845759.7U patent/CN213387548U/en active Active
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Effective date of registration: 20220111 Address after: 200131 floors 1-2, building 4, No. 1628, Lizheng Road, Lingang xinpian District, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: Shanghai Rongqing New Energy Technology Co.,Ltd. Address before: 138 Jiefang 4th village, Tianxin District, Changsha City, Hunan Province Patentee before: Hunan Bocheng Digital Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |