CN107061470B - Check bolt is used in components connection - Google Patents
Check bolt is used in components connection Download PDFInfo
- Publication number
- CN107061470B CN107061470B CN201710264690.5A CN201710264690A CN107061470B CN 107061470 B CN107061470 B CN 107061470B CN 201710264690 A CN201710264690 A CN 201710264690A CN 107061470 B CN107061470 B CN 107061470B
- Authority
- CN
- China
- Prior art keywords
- bolt
- stripper plate
- screw rod
- hole
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/10—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0023—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped
Abstract
The invention discloses components connection check bolts, including bolt, tapped through hole is provided on bolt, the axis of the tapped through hole is overlapped with the axis of bolt, the screw rod with tapped through hole cooperation is provided in tapped through hole, and one end on screw rod far from bolt head is pierced by tapped through hole, and end is provided with stripper plate herein, stripper plate bends to C-shaped, and the inner concave of stripper plate is connect with screw rod, and stripper plate is along the end face that the projection of bolt axis can fall in bolt shank；Rotary screw can make one end on screw rod far from bolt head mobile to bolt head, and so that stripper plate is contacted and is deformed with the bar portion end of bolt, and deformed stripper plate is along the end face that the projection of bolt axis cannot all fall within bolt shank.Deformed stripper plate limits bolt and exits from the threaded hole on components, and then avoids bolt appearance the case where loose unloading due to the vibration of engineering machinery, and the generation of engineering accident caused by having prevented because of bolt loose unloading.
Description
Technical field
The present invention relates to a kind of bolts, and in particular to check bolt is used in components connection.
Background technique
Bolt is a kind of by head and screw rod machine components dimerous, is used for adapted threaded hole.Bolt is mainly used
Cooperate in being fastenedly connected two components for having threaded hole, or with nut, for connect two components with through-hole.
As engineering machinery carries out related operation, the vibration generated when generating vibration and operation in motor drive can be transmitted to engineering machine
Each position of tool, and make the continuous loose unloading of the bolt on connecting portion, cause the connecting portion of engineering machinery unstable.This is not only
The repair rate of engineering machinery, and the complete loose unloading of bolt are increased, associated components, which fall off, will cause unnecessary engineering loss.
Summary of the invention
It is an object of that present invention to provide components connection check bolts, solve the bolt meeting in the operation of engineering machinery
Due to the vibration generated when operation the problem of loose unloading.Therefore the present invention designs a kind of components connection check bolt, avoids
Bolt occurs the case where loose unloading due to vibration in engineer machinery operation.
The present invention is achieved through the following technical solutions:
Components connection check bolt, including bolt, are provided with tapped through hole, the axis of the tapped through hole on bolt
Line is overlapped with the axis of bolt, and screw rod is provided in tapped through hole, and the screw rod and tapped through hole cooperate, and separate on screw rod
One end of bolt head is pierced by tapped through hole from the bar portion end of bolt, and end is provided with stripper plate herein, and the stripper plate is curved
Song is connect at C shape, the inner concave of stripper plate with screw rod, and stripper plate can fall in bolt shank along the projection of bolt axis
On end face；
Rotary screw can make one end on screw rod far from bolt head mobile to bolt head, and make stripper plate and bolt
Bar portion end contact and deform, and deformed stripper plate cannot all fall within the end face of bolt shank along the projection of bolt axis
On.
Before use, screw rod is located in tapped through hole, and tapped through hole is stretched out in one end of the upper separate bolt head of screw rod.Make
Used time first will need the components connected to be connected and fixed with bolt, then rotary screw, make the one end connecting on screw rod with stripper plate
Mobile to the head of bolt, until stripper plate deforms, and deformed stripper plate cannot all fall within spiral shell along the projection of bolt axis
On the end face of bolt stem, i.e., deformed stripper plate cannot pass through the threaded hole on components with bolt cooperation.It is deformed to squeeze
Pressing plate limits bolt and exits from the threaded hole on components, and then avoids the feelings of bolt loose unloading due to the vibration of engineering machinery
Condition occurs, and the generation of engineering accident caused by having prevented because of bolt loose unloading.
Further, one end on the side of screw rod close to stripper plate is provided with guide groove, the axis of the guide groove
It is parallel to the axis of screw rod, guide pad is provided on the end of stripper plate, the guide pad and guide groove cooperate.
The opening size of the guide groove is less than slot bottom size, and the cross section of the cross sectional dimensions of guide pad and guide groove
Size is consistent.There are two the guide grooves, and on the side wall that screw rod is arranged in along the axisymmetrical of screw rod；The two of stripper plate
A guide pad is provided on a end, and guide groove respectively cooperates with a guide pad respectively.
The setting of guide groove and guide pad conducive to deformation direction of the control stripper plate in deformation, and then makes deformed
Stripper plate is along the end face that the projection of bolt axis cannot all fall within bolt shank, to limit bolt from the screw thread on components
Hole is exited.
Further, locking spring, one end of the locking spring and stripper plate are provided on the inner concave of stripper plate
Inner concave on the surface far from stripper plate end connect, close to squeezing on the other end of locking spring and the inner concave of stripper plate
The surface of plate end connects, and after stripper plate deformation, locking spring is in compressive state.
Locking spring in compressive state generates thrust to abterminal face remote on stripper plate and by the face of proximal end,
And remote abterminal face is fixedly connected with screw rod on stripper plate, for opposite screw rod, remote abterminal face cannot be moved on stripper plate
It is dynamic, and the face on stripper plate by proximal end is contacted by guide pad with the guide groove of screw rod, therefore by proximal end on stripper plate
Face can be mobile to bolt head, but the face contact due to being leaned on around the face of proximal end and the threaded hole of components on stripper plate,
Therefore the locking spring in compressive state makes between the face on stripper plate around the threaded hole of the face of proximal end and components
Frictional force increase, and then limit screw rod loose unloading, to improve locking functions of the invention.
Further, the locking spring has several, and the two sides of screw rod are arranged in along the axisymmetrical of screw rod.
Further, cross groove is provided on the end face on screw rod far from stripper plate.Screwdriver and groove cooperate,
Bit rotary screwdriver can be such that screw rod moves in the axial direction.
Compared with prior art, the present invention having the following advantages and benefits:
1, components connection check bolt of the present invention, first will need the components connected to be connected and fixed, then revolve with bolt
Turn screw rod, keep the one end connecting on screw rod with stripper plate mobile to the head of bolt, until stripper plate deforms, and deformed crowded
For pressing plate along the end face that the projection of bolt axis cannot all fall within bolt shank, i.e., deformed stripper plate cannot pass through components
The threaded hole of upper and bolt cooperation；Deformed stripper plate limits bolt and exits from the threaded hole on components, and then avoids
Bolt occurs the case where loose unloading due to the vibration of engineering machinery, and the hair of engineering accident caused by having prevented because of bolt loose unloading
It is raw；
2, components connection check bolt of the present invention, the setting of guide groove and guide pad are becoming conducive to control stripper plate
Deformation direction in shape, and then make deformed stripper plate that cannot all fall within the end face of bolt shank along the projection of bolt axis
On, it is exited with limiting bolt from the threaded hole on components；
3, components connection check bolt of the present invention, the locking spring in compressive state is to end separate on stripper plate
Face and generate thrust by the face of proximal end, and remote abterminal face is fixedly connected with screw rod on stripper plate, and opposite screw rod comes
It says, remote abterminal face is immovable on stripper plate, and passes through the guiding of guide pad and screw rod on stripper plate by the face of proximal end
Slot contact, therefore can be mobile to bolt head by the face of proximal end on stripper plate, but due to leaning on the face of proximal end on stripper plate
With the face contact around the threaded hole of components, therefore in compressive state locking spring make on stripper plate lean on proximal end face
Frictional force between the face around the threaded hole of components increases, and then limits the loose unloading of screw rod, of the invention anti-to improve
Loose function.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of screw rod；
Fig. 3 is the main view of screw rod；
Fig. 4 is the cross-sectional view of the C-C along screw rod main view；
Fig. 5 is the cross-sectional view of the present invention before stripper plate deformation；
Fig. 6 is the deformed cross-sectional view of the present invention of stripper plate.
Label and corresponding parts title in attached drawing:
1- bolt, 2- tapped through hole, 3- screw rod, 4- stripper plate, 5- guide groove, 6- guide pad, 7- locking spring, 8- are recessed
Slot.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
As shown in figs 1 to 6, components connection check bolt, including bolt 1 of the present invention, are provided with spiral shell on bolt 1
The axis of line through-hole 2, the tapped through hole 2 is overlapped with the axis of bolt 1, and screw rod 3, the spiral shell are provided in tapped through hole 2
Bar 3 and tapped through hole 2 cooperate, and one end on screw rod 3 far from 1 head of bolt is pierced by tapped through hole from the bar portion end of bolt 1
2, and end is provided with stripper plate 4 herein, the stripper plate 4 bends to C-shaped, and the inner concave of stripper plate 4 is connect with screw rod 3, and squeezes
Pressing plate 4 is along the end face that the projection of 1 axis of bolt can fall in 1 bar portion of bolt；
Rotary screw 3 can make one end on screw rod 3 far from 1 head of bolt mobile to 1 head of bolt, and make stripper plate 4 with
The bar portion end of bolt 1 contacts and deforms, and deformed stripper plate 4 cannot all fall within bolt 1 along the projection of 1 axis of bolt
On the end face of bar portion.
Before use, screw rod 3 is located in tapped through hole 2, and the one end on 1 head of upper separate bolt of screw rod 3 is stretched out screw thread and is led to
Hole 2.In use, first the components that connect will be needed to be connected and fixed with bolt 1, then rotary screw 3, make on screw rod 3 with stripper plate
One end of 4 connections is mobile to the head of bolt 1, until stripper plate 4 deforms, and deformed stripper plate 4 is along the throwing of 1 axis of bolt
Shadow cannot be all fallen on the end face of 1 bar portion of bolt, i.e., deformed stripper plate 4 cannot by components with bolt 1 cooperate
Threaded hole.Deformed stripper plate 4 limits threaded hole of the bolt 1 from components and exits, and then avoids bolt 1 because of work
The vibration of journey machinery and the case where loose unloading, occur, and the generation of engineering accident caused by having prevented because of bolt loose unloading.
Embodiment 2
The present invention is on the basis of embodiment 1, to further illustrate to the present invention.
As shown in figs 1 to 6, components connection check bolt of the present invention, close to stripper plate 4 on the side of screw rod 3
One end is provided with guide groove 5, and the axis of the guide groove 5 is parallel to the axis of screw rod 3, is provided on the end of stripper plate 4
Guide pad 6, the guide pad 6 cooperate with guide groove 5.
The opening size of the guide groove 5 is less than slot bottom size, and the cross of the cross sectional dimensions of guide pad 6 and guide groove 5
Sectional dimension is consistent.There are two the guide grooves 5, and is arranged on the side wall of screw rod 3 along the axisymmetrical of screw rod 3；It is squeezing
A guide pad 6 is provided on two ends of pressing plate 4, and guide groove 5 respectively cooperates with a guide pad 6 respectively.
The setting of guide groove 5 and guide pad 6, conducive to deformation direction of the control stripper plate 4 in deformation, and then after making deformation
Stripper plate 4 along the end face that the projection of 1 axis of bolt cannot all fall within 1 bar portion of bolt, to limit bolt 1 from components
Threaded hole exit.
Embodiment 3
The present invention is on the basis of embodiment 1, to further illustrate to the present invention.
As shown in figs 1 to 6, components connection check bolt of the present invention, is provided with anti-on the inner concave of stripper plate 4
Loose spring 7, one end of the locking spring 7 is connect with the surface on the inner concave of stripper plate 4 far from 4 end of stripper plate, locking
The other end of spring 7 is connect with the surface on the inner concave of stripper plate 4 close to 4 end of stripper plate, locking after stripper plate 4 deforms
Spring 7 is in compressive state.
Locking spring 7 in compressive state pushes away abterminal face remote on stripper plate 4 and generating by the face of proximal end
Power, and remote abterminal face is fixedly connected with screw rod 3 on stripper plate 4, for opposite screw rod 3, remote abterminal face on stripper plate 4
It is immovable, and contacted by guide pad 6 with the guide groove 5 of screw rod 3 on stripper plate 4 by the face of proximal end, therefore stripper plate 4
The upper face by proximal end can be mobile to 1 head of bolt, but due to leaning on the face of proximal end and the threaded hole of components on stripper plate 4
The face contact of surrounding, therefore the locking spring 7 in compressive state makes the screw thread on stripper plate 4 by the face of proximal end and components
Frictional force between face around hole increases, and then limits the loose unloading of screw rod 3, to improve locking functions of the invention.
Further, the locking spring 7 has several, and the two of screw rod 3 is arranged in along the axisymmetrical of screw rod 3
Side.
Embodiment 4
The present invention is on the basis of embodiment 1, to further illustrate to the present invention.
As shown in figs 1 to 6, components connection check bolt of the present invention, on screw rod 3 on the end face of separate stripper plate 4
It is provided with cross groove 8.Screwdriver and groove 8 cooperate, and bit rotary screwdriver can be such that screw rod 3 moves in the axial direction.
When preventing 1 loose unloading of bolt, cooperates screwdriver and groove 8, and bit rotary screwdriver, make stripper plate 4 to 1, bolt
Portion is mobile, until deformation；When needing to dismantle the components connected by bolt 1, cooperate screwdriver and groove 8, and reversely revolve
Turn screwdriver, keeps screw rod 3 mobile to one end far from 1 head of bolt, until screw rod 3 is exited from tapped through hole 2, it is then loose again
Lay down bolt 1.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (7)
1. components connection check bolt, including bolt (1), are provided with tapped through hole (2), the screw thread on bolt (1)
The axis of through-hole (2) is overlapped with the axis of bolt (1), is provided in tapped through hole (2) screw rod (3), the screw rod (3) and spiral shell
Line through-hole (2) cooperation, and one end on screw rod (3) far from bolt (1) head is pierced by tapped through hole from the bar portion end of bolt (1)
(2), it is characterised in that: one end on the screw rod (3) far from bolt (1) head is provided with stripper plate (4), the stripper plate
(4) C-shaped is bent to, the inner concave of stripper plate (4) is connect with screw rod (3), and stripper plate (4) is equal along the projection of bolt (1) axis
It can fall on the end face of bolt (1) bar portion；
Rotary screw (3) can make one end on screw rod (3) far from bolt (1) head mobile to bolt (1) head, and make to squeeze
Plate (4) is contacted and is deformed with the bar portion end of bolt (1), and deformed stripper plate (4) cannot along the projection of bolt (1) axis
On the end face for all falling within bolt (1) bar portion.
2. components connection check bolt according to claim 1, it is characterised in that: leaned on the side of screw rod (3)
One end of nearly stripper plate (4) is provided with guide groove (5), and the axis of the guide groove (5) is parallel to the axis of screw rod (3), is being squeezed
It is provided on the end of pressing plate (4) guide pad (6), the guide pad (6) and guide groove (5) cooperate.
3. components connection check bolt according to claim 2, it is characterised in that: the opening of the guide groove (5)
Size is less than slot bottom size, and the cross sectional dimensions of guide pad (6) is consistent with the cross sectional dimensions of guide groove (5).
4. components connection check bolt according to claim 3, it is characterised in that: there are two the guide grooves (5),
And it is arranged on the side wall of screw rod (3) along the axisymmetrical of screw rod (3)；It is provided on two ends of stripper plate (4)
One guide pad (6), and guide groove (5) respectively cooperates with a guide pad (6) respectively.
5. components connection check bolt according to claim 1, it is characterised in that: the inner concave in stripper plate (4)
On be provided with locking spring (7), far from stripper plate (4) end on one end of the locking spring (7) and the inner concave of stripper plate (4)
The surface at end connects, close to the surface of stripper plate (4) end on the other end of locking spring (7) and the inner concave of stripper plate (4)
Connection, after stripper plate (4) deformation, locking spring (7) is in compressive state.
6. components connection check bolt according to claim 5, it is characterised in that: the locking spring (7) is if having
Dry, and the two sides of screw rod (3) are set along the axisymmetrical of screw rod (3).
7. components connection check bolt according to claim 1 to 6, it is characterised in that: in screw rod (3)
Cross groove (8) are provided on the upper end face far from stripper plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710264690.5A CN107061470B (en) | 2017-04-21 | 2017-04-21 | Check bolt is used in components connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710264690.5A CN107061470B (en) | 2017-04-21 | 2017-04-21 | Check bolt is used in components connection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107061470A CN107061470A (en) | 2017-08-18 |
| CN107061470B true CN107061470B (en) | 2019-08-06 |
Family
ID=59600600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710264690.5A Active CN107061470B (en) | 2017-04-21 | 2017-04-21 | Check bolt is used in components connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107061470B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6056490A (en) * | 1997-09-11 | 2000-05-02 | Dillemuth; Dan | Anti-rotational fastening system |
| CN2588112Y (en) * | 2001-11-28 | 2003-11-26 | 郑州铁路新科机车车辆配件有限公司 | Check screw |
| CN201461700U (en) * | 2009-05-18 | 2010-05-12 | 重庆宗申发动机制造有限公司 | Connecting piece of anti-loosening bolt |
| TWI518254B (en) * | 2014-07-17 | 2016-01-21 | Kabo Tool Co | Avoid loose bolts |
| CN204387073U (en) * | 2014-11-26 | 2015-06-10 | 常州市富利华车业有限公司 | Locking device with anti-decomposing lid and special spanner thereof |
| CN204572722U (en) * | 2015-04-21 | 2015-08-19 | 合肥工业大学 | The locking EXPANSION ANCHOR BOLTS of a kind of slide block type |
| CN105864250A (en) * | 2016-04-29 | 2016-08-17 | 国家电网公司 | Expansion screw |
| CN206015973U (en) * | 2016-07-29 | 2017-03-15 | 泰州奥正金属制品有限公司 | Back of the body bolt |
| CN206111805U (en) * | 2016-09-19 | 2017-04-19 | 浙江亦宸五金有限公司 | Locking type theftproof bolt |
-
2017
- 2017-04-21 CN CN201710264690.5A patent/CN107061470B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107061470A (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107061470B (en) | Check bolt is used in components connection | |
| CN106286528B (en) | A kind of high Anti-loosing riveting type self-plugging rivet | |
| CN204186723U (en) | Lock pin | |
| CN205415460U (en) | Bottle opener with locking function | |
| CN203889057U (en) | Pull rod fastening part of flight control system | |
| CN106884848A (en) | Retaining element screw retention method | |
| CN203809474U (en) | Anti-disengaging bolt assembly for bridge | |
| CN105972041A (en) | Double loosening preventing type bolt | |
| CN205201391U (en) | Low tone is apart from SMA moment spanner | |
| CN104088942A (en) | Spring device | |
| CN104806648A (en) | Novel expansion pin | |
| CN205497306U (en) | Tight spanner is pressed from both sides from excircle post of feeling relieved to roller wedge type | |
| CN103506561A (en) | Punching and riveting auxiliary device | |
| CN208157272U (en) | High voltage switch-off rod | |
| CN203726196U (en) | High precision fine tuning clamp employing pawls for preventing looseness | |
| CN201325041Y (en) | Hammer with vibration reduction function | |
| CN204828335U (en) | Novel bloated round pin and extracting tool thereof | |
| CN204209000U (en) | The curved mould adapter of a kind of bending machine | |
| CN203420224U (en) | Steel strand pulling device | |
| CN206527546U (en) | One kind is anti-to take up mechanism and frock | |
| CN203726192U (en) | Limit looseness preventing type high precision fine tuning clamp | |
| CN210068706U (en) | Bolt | |
| CN210361184U (en) | High-precision beryllium copper hammer head connecting structure | |
| CN213381348U (en) | Threaded wear screw disassembling tool | |
| CN203541423U (en) | Riveting auxiliary device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190710 Address after: 325000 Zhejiang Wenzhou Economic and Technological Development Zone Jinhai Sandao 329A District 2 Applicant after: Wenzhou Xinbao Fastener Co., Ltd. Address before: 618000 Tuqiang Village Group 2, Southwest Town, Mianzhu City, Deyang City, Sichuan Province Applicant before: Mianzhu Kerry machinery processing Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |