CN210878322U - Driving axle housing welding tool - Google Patents
Driving axle housing welding tool Download PDFInfo
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- CN210878322U CN210878322U CN201921931257.3U CN201921931257U CN210878322U CN 210878322 U CN210878322 U CN 210878322U CN 201921931257 U CN201921931257 U CN 201921931257U CN 210878322 U CN210878322 U CN 210878322U
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Abstract
The utility model relates to a drive axle housing welding tool, which comprises a tool base, two tool platforms and two groups of tool components; the two tool platforms are respectively and symmetrically arranged on the tool base, and jacking supporting mechanisms are respectively and symmetrically arranged on the two tool platforms; the two tool assemblies are respectively and symmetrically arranged on the two tool platforms; the two tool assemblies respectively comprise a tip mechanism and a clamping mechanism, the tip mechanisms of the two tool assemblies are located on the same axis, and the clamping mechanisms of the two tool assemblies are respectively arranged on the two tool platforms in a sliding mode. Driving axle housing welding frock can the tight work piece of accurate positioning clamp to can compromise the driving axle housing of multiple model, thereby guarantee the welding quality of work piece.
Description
Technical Field
The utility model relates to an axle housing equipment production facility technical field especially relates to a driving axle housing welding frock.
Background
The driving axle housing is an assembly base body for mounting a main speed reducer, a differential mechanism, a half shaft and the like, and is mainly used for supporting and protecting the main speed reducer, the differential mechanism, the half shaft and the like. In general, a conventional non-axle-break type drive axle housing is a rigid hollow beam supported on left and right drive wheels, in which drive elements such as a final drive, a differential, and half shafts are mounted, and is connected to a vehicle frame or a vehicle compartment by longitudinally-arranged leaf springs.
At present, a drive axle housing welding production line is shared by axle housings of various vehicle types. The axle housing that has now usually need weld the disc bottom plate with the axle housing body, however, the axle housing welding frock that has now can only waste time and energy and can put the exact position through operating personnel to disc bottom plate is tight with the location clamp of axle housing body to because the center of axle housing body is great with the sleeve axis error at both ends, thereby lead to being connected between axle housing body and the disc bottom plate firm accuracy inadequately, its welding quality is also not stable enough.
In addition, current axle housing welding frock can only press from both sides tight welding to the transaxle housing of same specification and dimension, and its application scope is little, when the transaxle housing of different specifications of processing, needs to design one set of assorted welding frock separately and presss from both sides tight welding. Therefore, the existing axle housing welding tool cannot compromise the welding processing of the driving axle housings of various specifications, and the automation degree is not high, so that the production cost is greatly improved.
Therefore, the driving axle housing welding tool is increasingly needed in the market to improve the production efficiency, reduce the production and processing cost and ensure the product quality so as to meet the requirement of large-scale industrial production.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims to overcome the not enough of prior art, provide a transaxle housing welding frock, can the tight work piece of accurate positioning clamp to can compromise the transaxle housing of multiple model, thereby guarantee the welding quality of work piece.
In order to realize the purpose, the utility model discloses a technical scheme be:
a driving axle housing welding tool comprises a tool base, two tool platforms and two groups of tool assemblies; the two tool platforms are respectively and symmetrically arranged on the tool base, and jacking supporting mechanisms are respectively and symmetrically arranged on the two tool platforms; the two tool assemblies are respectively and symmetrically arranged on the two tool platforms; the two tool assemblies respectively comprise a tip mechanism and a clamping mechanism, the tip mechanisms of the two tool assemblies are located on the same axis, and the clamping mechanisms of the two tool assemblies are respectively arranged on the two tool platforms in a sliding mode.
In order to obtain better technical effect, the further technical improvement further comprises that an auxiliary supporting mechanism is arranged on the tool base, and the auxiliary supporting mechanism is arranged in the middle between the two tool platforms.
In order to obtain better technological effect, further technical improvement still includes, supplementary supporting mechanism includes cylinder fixing base, auxiliary cylinder and floating location frame, the cylinder fixing base is installed on the frock base, auxiliary cylinder sets up in the cylinder fixing base, and auxiliary cylinder's output shaft passes the top of cylinder fixing base and supports to fix floating location frame's bottom.
In order to obtain better technical effect, the further technical improvement comprises that the floating positioning frame comprises an upper floating positioning plate and a lower floating positioning plate, the upper floating positioning plate and the lower floating positioning plate are connected through a plurality of upper guide rods, and each upper guide rod is sleeved with a spring; the bottom of the lower floating positioning plate is provided with a plurality of lower guide rods, the inner top surface of the cylinder fixing seat is provided with a plurality of linear bearings corresponding to the lower guide rods, and each lower guide rod is telescopically arranged in the corresponding linear bearing.
In order to obtain better technical effect, the further technical improvement comprises that the clamping mechanism comprises a front sliding support, a sliding cylinder, a rear sliding support and a corner cylinder; the sliding cylinder is arranged on one side of the front sliding support, and the output end of the sliding cylinder penetrates through the front sliding support and is fixedly connected with the rear sliding support; the corner cylinder is installed on one side, away from the front sliding support, of the rear sliding support, and a positioning clamping plate is arranged at the output end of the corner cylinder.
In order to obtain better technical effect, further technical improvement still includes, be equipped with two guide rails on the frock platform, the bottom both sides of preceding sliding support and back sliding support are equipped with the spout, and preceding sliding support slides through the spout of bottom respectively with back sliding support and sets up on the guide rail of frock platform.
In order to obtain better technical effect, the further technical improvement comprises that the centre mechanism comprises a centre support, a centre air cylinder and a rotating centre, the centre support is arranged on the tool platform, the centre air cylinder is arranged on the centre support, and the output end of the centre air cylinder is fixedly connected with the rotating centre.
In order to obtain better technical effect, the further technical improvement further comprises that the rotating centre comprises a centre outer shell with an opening at one end, a thrust ball bearing, a deep groove ball bearing and a centre tip part, the centre tip part is fixed at the opening end of the centre outer shell through a cover plate, the cover plate and the centre outer shell form a vacant cavity, the thrust ball bearing and the deep groove ball bearing are sequentially arranged in the vacant cavity, and a spacer sleeve is arranged between the thrust ball bearing and the deep groove ball bearing.
In order to obtain better technical effect, the further technical improvement further comprises that a front sliding guide rod is arranged between the front sliding support and the rear sliding support, a first bearing is arranged on the side wall of the front sliding support, one end of the front sliding guide rod is fixed on the rear sliding support, and the other end of the front sliding guide rod is telescopically arranged on the first bearing; a rear sliding guide rod is arranged between the tip support and the front sliding support, a second bearing is arranged on the side wall of the tip support, one end of the rear sliding guide rod is fixed on the front sliding support, and the other end of the rear sliding guide rod is arranged on the second bearing in a telescopic mode.
In order to gain better technological effect, further technological improvement still includes, jacking supporting mechanism includes cylinder fixed plate, jacking cylinder and tray, the cylinder fixed plate is installed on the frock platform, and the top of cylinder fixed plate is equipped with the spout, the tray slidable ground sets up in this spout, the jacking cylinder sets up the bottom of cylinder fixed plate, and the output of jacking cylinder passes the cylinder fixed plate and stretch into the spout and lean on to fix the bottom of tray.
The driving axle housing welding tool supports the sleeves at two ends of the axle housing through the jacking support mechanisms on the two tool platforms, and adopts the auxiliary support mechanism to flatten the axle housing workpiece, so as to prevent the axle housing workpiece from generating displacement in the horizontal direction; in addition, the disc type bottom plate is fixedly compressed through the clamping mechanism, the axial positioning and clamping of the sleeve pipes at the two ends of the axle housing are realized through the center mechanism of the rethread, so that the welding tool can accurately position and clamp the workpiece, and the driving axle housing of various models can be taken into account, the production and processing cost is reduced, and the welding quality of the workpiece is ensured.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a transaxle case welding tool according to the present embodiment;
FIG. 2 is a front view of the transaxle case welding tool of the present embodiment;
fig. 3 is a schematic connection diagram of the tooling base and the tooling platform according to the embodiment;
fig. 4 is a schematic structural diagram of the jacking support mechanism of the embodiment;
FIG. 5 is a schematic structural diagram of the auxiliary supporting mechanism of the present embodiment;
FIG. 6 is a schematic structural diagram of the tooling assembly of the present embodiment;
FIG. 7 is a front view of the tooling assembly of the present embodiment;
FIG. 8 is an enlarged view of the portion A shown in FIG. 1;
fig. 9 is a schematic structural view of the live center of the present embodiment.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible implementations and advantages of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Please refer to fig. 1 to fig. 9.
As shown in fig. 1 and fig. 2, the present embodiment provides a welding tooling for a transaxle case, which includes a tooling base 10, two tooling platforms 20, and two sets of tooling assemblies 30; the two tool platforms 20 are respectively and symmetrically arranged on the tool base 10, and the two tool platforms 20 are respectively and symmetrically provided with jacking supporting mechanisms 40; the two tooling assemblies 30 are respectively and symmetrically arranged on the two tooling platforms 20; the two tool assemblies 30 respectively comprise an apex mechanism 50 and a clamping mechanism 60, the apex mechanisms 50 of the two tool assemblies 30 are located on the same axis, and the clamping mechanisms 60 of the two tool assemblies 30 are respectively slidably arranged on the two tool platforms 20. In addition, the tool base 10 is provided with an auxiliary supporting mechanism 70, and the auxiliary supporting mechanism 70 is arranged in the middle between the two tool platforms 20.
As shown in fig. 3, the tooling base 10 of the present embodiment adopts a new design, and the bottom of the tooling base 10 is provided with an anchor bolt and a machine tool sizing block, so as to facilitate leveling operation of the tooling base 10; in addition, the lower end of the tooling base 10 is provided with a fork opening, so that the tooling base 10 can be conveniently moved by a forklift.
As shown in fig. 4, the jacking supporting mechanism 40 of this embodiment includes a cylinder fixing plate 41, a jacking cylinder 42 and a supporting block 43, the cylinder fixing plate 41 is installed on the tooling platform 20, a sliding groove is provided above the cylinder fixing plate 41, the supporting block 43 is slidably disposed in the sliding groove, the jacking cylinder 42 is disposed at the bottom of the cylinder fixing plate 41, and an output end of the jacking cylinder 42 penetrates through the cylinder fixing plate 41 and extends into the sliding groove to abut against and be fixed at the bottom of the supporting block 43. In addition, the upper end of the supporting block 43 of this embodiment is provided with an arc surface in an inward concave manner.
As shown in fig. 5, the auxiliary support mechanism 70 includes a cylinder fixing seat 71, an auxiliary cylinder 72 and a floating positioning frame 73, the cylinder fixing seat 71 is installed on the tooling base 10, the auxiliary cylinder 72 is disposed in the cylinder fixing seat 71, and an output shaft of the auxiliary cylinder 72 passes through the top of the cylinder fixing seat 71 and abuts against and is fixed at the bottom of the floating positioning frame 73.
The floating positioning frame 73 comprises an upper floating positioning plate 74 and a lower floating positioning plate 75, the upper floating positioning plate 74 and the lower floating positioning plate 75 are connected through a plurality of upper guide rods 76, and each upper guide rod 76 is sleeved with a spring; the bottom of lower floating locating plate 75 is equipped with a plurality of guide bars 77 down, the inside top surface of cylinder fixing base 71 is equipped with a plurality of linear bearing 78 corresponding with guide bar 77 down, and every guide bar 77 is arranged in corresponding linear bearing 78 telescopically.
As shown in fig. 6 to 9, in the present embodiment, the clamping mechanism 60 includes a front slide bracket 61, a slide cylinder 62, a rear slide bracket 63, and a corner cylinder 64; the sliding cylinder 62 is installed at one side of the front sliding bracket 61, and the output end of the sliding cylinder passes through the front sliding bracket 61 and is fixedly connected with the rear sliding bracket 63; the corner cylinder 64 is installed on one side of the rear sliding support 63 far away from the front sliding support 61, and the output end of the corner cylinder is provided with a positioning clamping plate 65. Two rows of guide rails 21 are arranged on the tooling platform 20, sliding grooves are formed in two sides of the bottoms of the front sliding support 61 and the rear sliding support 63, and the front sliding support 61 and the rear sliding support 63 are arranged on the guide rails 21 of the tooling platform 20 respectively in a sliding mode through the sliding grooves in the bottoms. In the present embodiment, four corner cylinders 64 are provided on each rear sliding bracket 63.
In this embodiment, the center mechanism 50 includes a center holder 51, a center cylinder 52 and a live center 53, the center holder 51 is mounted on the tooling platform 20, the center cylinder 52 is mounted on the center holder 51, and an output end of the center cylinder is fixedly connected to the live center 53. Specifically, the rotating centre 51 comprises a centre outer shell 54 with an opening at one end, a thrust ball bearing 55, a deep groove ball bearing 56 and a top tip part 57, the top tip part 57 is fixed at the opening end of the centre outer shell 54 through a cover plate 58, the cover plate 58 and the centre outer shell 54 form a vacant cavity, the thrust ball bearing 55 and the deep groove ball bearing 59 are sequentially arranged in the vacant cavity, and a spacer 59 is arranged between the thrust ball bearing 55 and the deep groove ball bearing 56.
In addition, a front sliding guide rod 66 is arranged between the front sliding support 61 and the rear sliding support 63, a first bearing is arranged on the side wall of the front sliding support 61, one end of the front sliding guide rod 66 is fixed on the rear sliding support 63, and the other end is telescopically arranged on the first bearing; a rear sliding guide rod 67 is arranged between the center support 51 and the front sliding support 61, a second bearing is arranged on the side wall of the center support 51, one end of the rear sliding guide rod 67 is fixed on the front sliding support 61, and the other end of the rear sliding guide rod is telescopically arranged on the second bearing.
The present embodiment further includes an electrical control unit, which is connected to the jacking mechanism 40, the tip mechanism 50, the clamping mechanism 60, and the auxiliary supporting mechanism 70, respectively.
The following description the utility model discloses a driving axle housing welding frock's theory of operation:
when a workpiece is installed, firstly, a disc-type bottom plate is placed on the rear sliding support 63 of the two-end tool platform 20, eight corner cylinders 64 at two ends rotate simultaneously, two disc-type bottom plates are positioned and clamped through the positioning and clamping plate 65, then an axle housing workpiece needing to be welded is hoisted to the two jacking supporting mechanisms 40 of the two-end tool platform 20 through a crane, the jacking cylinders 42 at two ends act simultaneously to jack the axle housing to the axes of the two tip mechanisms 40, then the axle housing is lifted through the auxiliary cylinder 72 to be leveled, finally, the disc-type bottom plate is pushed to the right position through the simultaneous relative action of the tip cylinder 52 and the sliding cylinder 62, and the sleeve pipes at two ends of the axle housing are jacked by the rotating tip 53.
The driving axle housing welding tool supports the sleeves at two ends of the axle housing through the jacking support mechanisms on the two tool platforms, and adopts the auxiliary support mechanism to flatten the axle housing workpiece, so as to prevent the axle housing workpiece from generating displacement in the horizontal direction; in addition, the disc type bottom plate is fixedly compressed through the clamping mechanism, the axial positioning and clamping of the sleeve pipes at the two ends of the axle housing are realized through the center mechanism of the rethread, so that the welding tool can accurately position and clamp the workpiece, and the driving axle housing of various models can be taken into account, the production and processing cost is reduced, and the welding quality of the workpiece is ensured.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not understood as the limitation to the scope of the welding tool for the driving axle housing of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. The utility model provides a transaxle shell welding frock which characterized in that: the tool comprises a tool base, two tool platforms and two groups of tool components; the two tool platforms are respectively and symmetrically arranged on the tool base, and jacking supporting mechanisms are respectively and symmetrically arranged on the two tool platforms; the two tool assemblies are respectively and symmetrically arranged on the two tool platforms; the two tool assemblies respectively comprise a tip mechanism and a clamping mechanism, the tip mechanisms of the two tool assemblies are located on the same axis, and the clamping mechanisms of the two tool assemblies are respectively arranged on the two tool platforms in a sliding mode.
2. The transaxle case welding tool of claim 1, wherein: the tool base is provided with an auxiliary supporting mechanism, and the auxiliary supporting mechanism is arranged in the middle between the two tool platforms.
3. The transaxle case welding tool of claim 2, wherein: the auxiliary supporting mechanism comprises a cylinder fixing seat, an auxiliary cylinder and a floating positioning frame, the cylinder fixing seat is installed on the tooling base, the auxiliary cylinder is arranged in the cylinder fixing seat, and an output shaft of the auxiliary cylinder penetrates through the top of the cylinder fixing seat and is abutted against and fixed to the bottom of the floating positioning frame.
4. The transaxle case welding tool of claim 3, wherein: the floating positioning frame comprises an upper floating positioning plate and a lower floating positioning plate, the upper floating positioning plate and the lower floating positioning plate are connected through a plurality of upper guide rods, and each upper guide rod is sleeved with a spring; the bottom of the lower floating positioning plate is provided with a plurality of lower guide rods, the inner top surface of the cylinder fixing seat is provided with a plurality of linear bearings corresponding to the lower guide rods, and each lower guide rod is telescopically arranged in the corresponding linear bearing.
5. The transaxle case welding tool of claim 1, wherein: the clamping mechanism comprises a front sliding support, a sliding cylinder, a rear sliding support and a corner cylinder; the sliding cylinder is arranged on one side of the front sliding support, and the output end of the sliding cylinder penetrates through the front sliding support and is fixedly connected with the rear sliding support; the corner cylinder is installed on one side, away from the front sliding support, of the rear sliding support, and a positioning clamping plate is arranged at the output end of the corner cylinder.
6. The transaxle case welding tool of claim 5, wherein: the tool platform is provided with two rows of guide rails, the two sides of the bottoms of the front sliding support and the rear sliding support are provided with sliding grooves, and the front sliding support and the rear sliding support are arranged on the guide rails of the tool platform in a sliding mode through the sliding grooves in the bottoms respectively.
7. The transaxle case welding tool of claim 5, wherein: the center mechanism comprises a center support, a center air cylinder and a rotating center, the center support is installed on the tool platform, the center air cylinder is installed on the center support, and the output end of the center air cylinder is fixedly connected with the rotating center.
8. The transaxle case welding tool of claim 7, wherein: the rotary centre comprises a centre shell with an opening at one end, a thrust ball bearing, a deep groove ball bearing and a centre tip part, wherein the centre tip part is fixed at the opening end of the centre shell through a cover plate, the cover plate and the centre shell form a vacant cavity, the thrust ball bearing and the deep groove ball bearing are sequentially arranged in the vacant cavity, and a spacer sleeve is arranged between the thrust ball bearing and the deep groove ball bearing.
9. The transaxle case welding tool of claim 7, wherein: a front sliding guide rod is arranged between the front sliding support and the rear sliding support, a first bearing is arranged on the side wall of the front sliding support, one end of the front sliding guide rod is fixed on the rear sliding support, and the other end of the front sliding guide rod is telescopically arranged on the first bearing; a rear sliding guide rod is arranged between the tip support and the front sliding support, a second bearing is arranged on the side wall of the tip support, one end of the rear sliding guide rod is fixed on the front sliding support, and the other end of the rear sliding guide rod is arranged on the second bearing in a telescopic mode.
10. The transaxle case welding jig of any one of claims 1 to 9, wherein: jacking supporting mechanism includes cylinder fixed plate, jacking cylinder and tray, the cylinder fixed plate is installed on the frock platform, and the top of cylinder fixed plate is equipped with the spout, the tray slidable ground sets up in this spout, the jacking cylinder sets up the bottom of cylinder fixed plate, and the output of jacking cylinder passes the cylinder fixed plate and stretch into the spout and lean on fixing the bottom of tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921931257.3U CN210878322U (en) | 2019-11-08 | 2019-11-08 | Driving axle housing welding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921931257.3U CN210878322U (en) | 2019-11-08 | 2019-11-08 | Driving axle housing welding tool |
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| Publication Number | Publication Date |
|---|---|
| CN210878322U true CN210878322U (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921931257.3U Active CN210878322U (en) | 2019-11-08 | 2019-11-08 | Driving axle housing welding tool |
Country Status (1)
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| CN (1) | CN210878322U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112077491A (en) * | 2020-08-31 | 2020-12-15 | 方盛车桥（柳州）有限公司 | Axle housing accessory welding tool |
| CN113084421A (en) * | 2021-05-24 | 2021-07-09 | 泰州神舟传动科技有限公司 | Annular welding robot for axle housing rear cover |
| CN113478264A (en) * | 2021-07-23 | 2021-10-08 | 南京工程学院 | Special machine tool for boring rear axle housing |
| CN114043139A (en) * | 2021-12-16 | 2022-02-15 | 泰安九洲金城机械有限公司 | Axle housing and wheel rim support shaft welding tool for drive axle |
| CN115008163A (en) * | 2022-07-01 | 2022-09-06 | 盐城旭捷自动化设备有限公司 | Adopt flexible assembly line of car of robot |
-
2019
- 2019-11-08 CN CN201921931257.3U patent/CN210878322U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112077491A (en) * | 2020-08-31 | 2020-12-15 | 方盛车桥（柳州）有限公司 | Axle housing accessory welding tool |
| CN113084421A (en) * | 2021-05-24 | 2021-07-09 | 泰州神舟传动科技有限公司 | Annular welding robot for axle housing rear cover |
| CN113084421B (en) * | 2021-05-24 | 2022-11-18 | 泰州神舟传动科技有限公司 | Annular welding robot for axle housing rear cover |
| CN113478264A (en) * | 2021-07-23 | 2021-10-08 | 南京工程学院 | Special machine tool for boring rear axle housing |
| CN113478264B (en) * | 2021-07-23 | 2022-06-17 | 南京工程学院 | Special machine tool for boring rear axle housing |
| CN114043139A (en) * | 2021-12-16 | 2022-02-15 | 泰安九洲金城机械有限公司 | Axle housing and wheel rim support shaft welding tool for drive axle |
| CN115008163A (en) * | 2022-07-01 | 2022-09-06 | 盐城旭捷自动化设备有限公司 | Adopt flexible assembly line of car of robot |
| CN115008163B (en) * | 2022-07-01 | 2023-12-05 | 盐城旭捷自动化设备有限公司 | Automobile flexible assembly line adopting robot |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wu Zhiqiang Inventor after: Wang Min Inventor after: Liu Huiying Inventor after: Yu Ming Inventor before: Wu Zhiqiang Inventor before: Wang Min Inventor before: Liu Huiying |