CN207858217U - A kind of press fitting axle housing hangs upside down the mechanism of bolt - Google Patents
A kind of press fitting axle housing hangs upside down the mechanism of bolt Download PDFInfo
- Publication number
- CN207858217U CN207858217U CN201820177394.1U CN201820177394U CN207858217U CN 207858217 U CN207858217 U CN 207858217U CN 201820177394 U CN201820177394 U CN 201820177394U CN 207858217 U CN207858217 U CN 207858217U
- Authority
- CN
- China
- Prior art keywords
- bolt
- press fitting
- compression bar
- axle housing
- upside down
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses the mechanisms that a kind of press fitting axle housing hangs upside down bolt, it includes workbench, the top end surface of the workbench is installed with pressure bolt base station, bottom end face is symmetrically installed with support plate, it is described pressure bolt base station inside be uniformly slidably installed have more for press fitting compression bar, the head of every compression bar is both provided with pressure head；The other end of the compression bar sequentially passes through workbench, umbrella guide plate and circular plates, pinion gear is set on the compression bar between umbrella guide plate and circular plates, the pinion gear is matched with gear ring engagement transmission mechanism, and compression bar is driven to rotate；The gear ring engagement transmission mechanism is matched with the pneumatic rackwork for driving it to rotate；The end of the umbrella guide plate is connected by screw shell with the lifting gear for driving entire gear ring engagement transmission mechanism to move up and down.This mechanism can be used on automobile axle housing hanging upside down the press fitting assembly of bolt, and then improve press fitting efficiency, ensure press fitting safety.
Description
Technical field
The utility model is related to the mechanisms that a kind of press fitting axle housing hangs upside down bolt, belong to auto parts and components assembly equipment field,
It is mainly used for being pressed the projecting bolt of automobile axle housing.
Background technology
In the press fitting that automobile axle housing hangs upside down bolt, bolt is mainly put into scheduled position, then manually uses tool
It is single to tap in indentation axle housing.The cavity space of projecting bolt is smaller and semiclosed, inconvenient for operation, not only low production efficiency,
And the process of press fitting is easy to hurt sb.'s feelings.
Utility model content
Problem to be solved in the utility model is to provide a kind of mechanism of the projecting bolt of press fitting axle housing, this mechanism can use
In the press fitting assembly for hanging upside down bolt on automobile axle housing, and then raising is pressed efficiency, ensures press fitting safety.
In order to solve the above-mentioned technical problem, the utility model proposes following technical schemes：A kind of projecting bolt of press fitting axle housing
Mechanism, it includes workbench, and the top end surface of the workbench is installed with pressure bolt base station, and bottom end face is symmetrically installed
Have a support plate, the inside of the pressure bolt base station be uniformly slidably installed have more for press fitting compression bar, every compression bar
Head is both provided with pressure head；The other end of the compression bar sequentially passes through workbench, umbrella guide plate and circular plates, is led positioned at umbrella
Pinion gear is set on compression bar between plate and circular plates, the pinion gear is matched with gear ring engagement transmission mechanism, and is driven
Dynamic pressure bar rotates；The gear ring engagement transmission mechanism is matched with the pneumatic rackwork for driving it to rotate；The umbrella
The end of guide plate is connected by screw shell with the lifting gear for driving entire gear ring engagement transmission mechanism to move up and down.
Boss is provided on the pressure bolt base station, the boss is matched with press mounting bolt position is waited on axle housing,
It is equipped with and the matched copper sheathing of compression bar in the inside of pressure bolt base station.
The compression bar and pressure head are combined into inverted L-type component, the number of the L-type component and bolt on axle housing to be pressed
It is identical, and position corresponds.
Ladder shaft part is machined on the compression bar, location and installation has thrust bearing, the thrust shaft on the ladder shaft part
The other end held is in contact cooperation with the end face of umbrella guide plate；The end of the ladder shaft part is by the first locking nut and only
Thrust bearing is fixed on circular plates.
The gear ring engagement transmission mechanism includes cylinder, and the bottom end face of the cylinder is machined with rotating boss, described turn
Annular groove composition of the dynamic boss with processing in circular plates upper surface is slidably matched；It is installed in the top outer end of cylinder
External toothing is installed with ring gear in the bottom inner end of cylinder, and the ring gear is engaged with the pinion gear being sleeved on compression bar
Transmission.
The pneumatic rackwork includes rack, the external toothing engaged transmission of the rack and gear ring engagement transmission mechanism,
The rear ends of the rack are installed with guide rail, and the guide rail constitutes sliding with the sliding block of fixed installation on the supporting plate and matches
It closes, the end of the rack is installed with push plate, and the push plate is matched with the cylinder being fixed on support plate side wall, and is pushed away
Dynamic push plate movement.
The pneumatic rackwork shares two sets, and reverse symmetry arrangement is mounted on the external toothing of gear ring engagement transmission mechanism
Both sides.
The lifting gear includes oil cylinder, and the oil cylinder is fixedly mounted in oil cylinder fixed plate, and the oil cylinder fixed plate is solid
Dingan County is mounted in the end of support plate, and the piston-rod end of the oil cylinder is connected by screw shell with umbrella guide plate, the screw thread
The upper/lower terminal of sleeve is set with the second locking nut for being useful for fixed thread sleeve；The umbrella guide plate is led with circle
It is fixedly linked by third locking nut between plate.
The screw shell uses outer-hexagonal head long sleeve, the two of which parallel surface of the outer-hexagonal head long sleeve with it is anti-
The limit card slot composition of oil cylinder rotating member is slidably matched, and the anti-oil cylinder rotating member is fixedly mounted on the madial wall of support plate.
The utility model has the advantages that：
1, the mechanism that bolt is hung upside down by using above-mentioned press fitting axle housing, the automatic press mounting that can be used in bolt on axle housing are made
Industry, and can once be pressed more bolts, it solves traditional artificial percussion axle housing and hangs upside down the dangerous and efficiency of bolt operation
Low problem is realized and is disposably all pressed into all projecting bolts, has very strong practicability in automobile production.
2, by the mechanism, compression bar can be driven to be rotated, and then the pressure head of its end is driven to rotate, made at its
In opening or recycling state, when it is in retracted state, ensures that it can pass through the through-hole of axle housing, open shape when it is in
When state, it can be matched with the projecting bolt on axle housing, and then it is effectively pressed.
3, entire compression bar can be driven to be rotated by the gear ring engagement transmission mechanism, in operating process, passed through
External toothing drives cylinder, drives ring gear by cylinder, then by ring gear driving pinion, pinion gear drives compression bar rotation, makes
Pressure head is opened or is retracted, and then facilitates its rotation.
4, gear ring engagement transmission mechanism can be driven to act by the pneumatic rackwork, in the course of work, passed through
Cylinder pushes push plate, then by push plate band carry-over bar, and then by rack in external toothing engaged transmission.
5, coordinated by the transmission between the guide rail and sliding block, can ensure that rack smoothly slides, and then ensured
Rack can drive external toothing to rotate.
6, umbrella guide plate, external toothing, ring gear and circular plates can be driven along copper sheathing by the lifting gear
It slides up and down, and then ensure that and can stretch to compression bar.
7, can play the role of reducing friction by the copper sheathing.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the overall structure figure of the utility model.
Fig. 2 is the local main sectional view of the utility model.
Fig. 3 be the utility model Fig. 2 in Section A-A figure.
Fig. 4 is the pressure rod structure schematic diagram of the utility model.
Fig. 5 is the compression bar and umbrella guide plate and circular plates mounting structure schematic diagram of the utility model.
Fig. 6 is that the pressure head of the utility model is in contraction state structural schematic diagram.
Fig. 7 is that the pressure head of the utility model is in open configuration structural schematic diagram.
Fig. 8 is the product axle housing structure schematic diagram to be pressed of the utility model.
In figure：Pressure head 1, compression bar 2, workbench 3, guide rail 4, sliding block 5, push plate 6, cylinder 7, cylinder 8, anti-oil cylinder rotating member 9,
Support plate 10, oil cylinder 11, oil cylinder fixed plate 12, the second locking nut 13, the first locking nut 14, thrust bearing 15, cylinder are solid
Fixed board 16, rack 17, pressure bolt base station 18, copper cylinder 19, umbrella guide plate 20, external toothing 21, ring gear 22, pinion gear 23, circle
Guide plate 24, third locking nut 25, screw shell 26, rotating boss 27, annular groove 28, limit card slot 29, ladder shaft part 30,
Axle housing 31.
Specific implementation mode
The embodiment of the utility model is described further below in conjunction with the accompanying drawings.
As shown in figures 1-8, a kind of press fitting axle housing hangs upside down the mechanism of bolt, it includes workbench 3, the top of the workbench 3
End surface is installed with pressure bolt base station 18, and bottom end face is symmetrically installed with support plate 10, described to press the interior of bolt base station 18
Portion be uniformly slidably installed have more for press fitting compression bar 2, the head of every compression bar 2 is both provided with pressure head 1；The compression bar
2 other end sequentially passes through workbench 3, umbrella guide plate 20 and circular plates 24, be located at umbrella guide plate 20 and circular plates 24 it
Between compression bar 2 on be set with pinion gear 23, the pinion gear 23 is matched with gear ring engagement transmission mechanism, and drives 2 turns of compression bar
It is dynamic；The gear ring engagement transmission mechanism is matched with the pneumatic rackwork for driving it to rotate；The umbrella guide plate 20
End is connected by screw shell 26 with the lifting gear for driving entire gear ring engagement transmission mechanism to move up and down.By adopting
It with above-mentioned mechanism, solves the problems, such as to hang upside down bolt by traditional artificial percussion axle housing that operate dangerous and efficiency low, realizes one
All projecting bolts are all pressed by secondary property, and then ensure that the safety of operation, improve press fitting efficiency.
Further, it is provided with boss on the pressure bolt base station 18, press mounting bolt institute is waited on the boss and axle housing 31
It matches in position, is equipped with and 2 matched copper sheathing 19 of compression bar in the inside of pressure bolt base station 18.Pass through the copper sheathing 19
Achieve the effect that reduce friction in rotation process.By the boss, it is placed on designated position convenient for axle housing, and then convenient
Positioning and clamping are carried out to it.
Further, the compression bar 2 and pressure head 1 are combined into inverted L-type component, the L-type component and axle housing to be pressed
The number of bolt is identical on 31, and position corresponds.It is matched with bolt to be pressed by the way that the pressure head 1 is convenient.
Further, ladder shaft part 30 is machined on the compression bar 2, location and installation has thrust shaft on the ladder shaft part 30
Hold 15, the other end of the thrust bearing 15 is in contact cooperation with the end face of umbrella guide plate 20；The end of the ladder shaft part 30
End is fixed on by the first locking nut 14 and thrust bearing 15 on circular plates 24.Guiding is played by the compression bar 2
Effect, and moved up and down by compression bar 2 and realize that the function of bolt is hung upside down in press fitting with left-right rotation.Pass through the thrust bearing 15
Reduce frictional force of the compression bar 2 in rotation process.The circular plates 24 are sleeved on 20 main shaft of umbrella guide plate, and pass through rank
Ladder positions it, and the diameter in the hole on the circular plates 24 is more than the diameter of ladder shaft part 30, reduces in rotation process
Friction.
Further, the plectane diameter of the umbrella guide plate 20 is slightly less than the inside diameter of cylinder 7, reduces rubbing for rotation
It wipes.
Further, the gear ring engagement transmission mechanism includes cylinder 7, and the bottom end face of the cylinder 7 is machined with rotation
Boss 27, annular groove 28 composition of the rotating boss 27 with processing in 24 upper surface of circular plates are slidably matched；In cylinder 7
Top outer end be installed with external toothing 21, be installed with ring gear 22, the ring gear 22 in the bottom inner end of cylinder 7
With 23 engaged transmission of pinion gear being sleeved on compression bar 2.Using the above structure, it in the course of work, is driven and is justified by external toothing 21
Cylinder 7 drives ring gear 22 by cylinder 7, then by 22 driving pinion 23 of ring gear, pinion gear 23 drives compression bar 2 to rotate, makes pressure
First 1 opens or retracts, and then facilitates its rotation.
Further, it is gap-matched between rotating boss 27 and annular groove 28, reduces the friction in rotation process.
Further, 14 groups of compression bar 2, thrust ball bearing 15, umbrella guide plate 20, circular plates 24 and the first locking nut
At component can make compression bar rotate in the case of two guide plates do not rotate.
Further, the pinion gear 22 is fixed on the middle section that compression bar passes through umbrella guide plate 20 and circular plates 24,
There is certain distance with above and below, reduces the friction in rotation process.
Further, fixed external toothing 21, lower end inside fix ring gear 22 on the outside of 7 upper end of cylinder, and ring gear 22 is in umbrella
Among shape guide plate 20 and circular plates 24, there is a certain distance with top and bottom, reduce the friction in rotation process.
Further, the round board diameter of umbrella guide plate 20 is more than the bottom of the tooth circular diameter of ring gear 22, in downdraw process,
Umbrella guide plate 20 is contacted with 22 end face of ring gear, realizes that cylinder 7 and external toothing 21 move downward.
Further, the pneumatic rackwork includes rack 17, and the rack 17 is outer with gear ring engagement transmission mechanism
The engaged transmission of gear ring 21, the rear ends of the rack 17 are installed with guide rail 4, the guide rail 4 and are fixedly mounted on support
The composition of sliding block 5 on plate 10 is slidably matched, and the end of the rack 17 is installed with push plate 6, the push plate 6 and is fixed on branch
Cylinder 8 on 10 side wall of fagging matches, and push plate 6 is pushed to move.By using above-mentioned structure, in the course of work, pass through
The pneumatic rackwork can drive gear ring engagement transmission mechanism to act, and in the course of work, push plate 6 is pushed by cylinder 8,
Again by push plate 6 with carry-over bar 17, and then by rack 17 in 21 engaged transmission of external toothing.
Further, the width of rack 17 is more than the width of external toothing 21, ensures to take off when external toothing 21 moves up and down
It is engaged from rack, and guiding role is played to the up and down motion of mechanism, without separately setting guide groove.
Further, 21 extreme higher position of external toothing prevents motion process from touching with workbench 3 there are certain spacing
It hits.
Further, the pneumatic rackwork shares two sets, and reverse symmetry arrangement is mounted on gear ring engaged transmission machine
21 both sides of external toothing of structure.Cylinder 8 pushing direction in both sides is on the contrary, can not only provide enough power but also can be with balance cylinder
Thrust.
Further, the lifting gear includes oil cylinder 11, and the oil cylinder 11 is fixedly mounted in oil cylinder fixed plate 12, institute
State the end that oil cylinder fixed plate 12 is fixedly mounted on support plate 10, the piston-rod end of the oil cylinder 11 by screw shell 26 with
Umbrella guide plate 20 is connected, and the upper/lower terminal of the screw shell 26 is set with the second lock for being useful for fixed thread sleeve 26
Tight nut 13；It is fixedly linked by third locking nut 25 between the umbrella guide plate 20 and circular plates 24.
Further, the piston-rod end of oil cylinder 11 and 20 the tip of the axis of umbrella guide plate have screw thread, are connected through a screw thread,
The hand of thread spiral at the both ends of screw shell 26 is on the contrary, be easily installed, and can pass through adjusting 11 piston rod of oil cylinder and umbrella
L-type component is adjusted to the axle housing that different positions is pressed different height by the distance of 20 axis of shape guide plate.
Further, the use of the screw shell 26 outer-hexagonal head long sleeve, wherein the two of the outer-hexagonal head long sleeve
The composition of limit card slot 29 of a parallel surface and anti-oil cylinder rotating member 9 is slidably matched, and the anti-oil cylinder rotating member 9 is fixedly mounted on branch
On the madial wall of fagging 10.The case where rotation of oil cylinder 11 is to damage oil cylinder 11 can be being driven in preventing rotary course.
The course of work and operation principle of the utility model be：
Step1：Axle housing 31 is placed on pressure bolt pedestal 18, cylinder 8 is started and pushes push plate 6, is driven by push plate 6
Rack 17, rack 17 drive external toothing 21, and cylinder 7 is driven by external toothing 21, drive ring gear 22 by cylinder 7, then by internal tooth
22 driving pinions 23 are enclosed, pinion gear 23 drives compression bar 2 to rotate, and pressure head 1 is made to open；
Step2：Before pushing, pressure head 1 is in open configuration, restarts oil cylinder 11, and oil cylinder 11 drives piston rod to pull down
It is dynamic, it transfers power on the component that umbrella guide plate 20 and circular plates 24 form, to drive the pressure head 1 of compression bar 2 to be pressed downward,
At the same time, umbrella guide plate 20 and circular plates 24 drive ring gear 22, cylinder 7 and external toothing 21 to move downward, under pressure head 1
End face is in contact with the bolt on axle housing 31, and is pressed to it；
Step3：After press fitting, start oil cylinder 11, oil cylinder 11 pushes up, and transfers power to umbrella guide plate 20 and circle
On the component that shape guide plate 24 forms, to drive the pressure head 1 of compression bar 2 to push up, at the same time, circular plates 24 push cylinder
And the ring gear 22 and external toothing 21 being fixed in the above move upwards, and pressure head 1 is made to be detached from the bolt on axle housing 31；
Step4：Start cylinder 8 and pushes push plate 6, by push plate 6 with carry-over bar 17, rack 17 drives external toothing 21, by
External toothing 21 drives cylinder 7, drives ring gear 22 by cylinder 7, then by 22 driving pinion 23 of ring gear, pinion gear 23 drives
Compression bar 2 rotates, and pressure head 1 is made to reset, and is in retracted state；
Step5：After press fitting terminates, axle housing 31 is removed.
Through the above description, those skilled in the art completely can be without departing from this item utility model technological thought
In the range of, it carries out various changes and amendments and is within the protection scope of the utility model.The utility model is not use up
Matters belong to the common knowledge of those skilled in the art.
Claims (9)
1. a kind of press fitting axle housing hangs upside down the mechanism of bolt, it is characterised in that：It includes workbench（3）, the workbench（3）Top
End surface is installed with pressure bolt base station（18）, bottom end face is symmetrically installed with support plate（10）, the pressure bolt base station
（18）Inside be uniformly slidably installed have more for press fitting compression bar（2）, every compression bar（2）Head be both provided with pressure
Head（1）；The compression bar（2）The other end sequentially pass through workbench（3）, umbrella guide plate（20）And circular plates（24）, it is located at umbrella
Shape guide plate（20）And circular plates（24）Between compression bar（2）On be set with pinion gear（23）, the pinion gear（23）With gear ring
Engagement transmission mechanism matches, and drives compression bar（2）Rotation；The gear ring engagement transmission mechanism and the gas for driving it to rotate
Carry-over bar mechanism matches；The umbrella guide plate（20）End pass through screw shell（26）With for driving entire gear ring to engage
The lifting gear that transmission mechanism moves up and down is connected.
2. a kind of press fitting axle housing according to claim 1 hangs upside down the mechanism of bolt, it is characterised in that：The pressure bolt base station
（18）On be provided with boss, the boss and axle housing（31）On wait for that press mounting bolt position matches, pressure bolt base station
（18）Inside be equipped with and compression bar（2）Matched copper sheathing（19）.
3. a kind of press fitting axle housing according to claim 1 hangs upside down the mechanism of bolt, it is characterised in that：The compression bar（2）With
Pressure head（1）It is combined into inverted L-type component, the L-type component and axle housing to be pressed（31）The number of upper bolt is identical, and position
It corresponds.
4. a kind of press fitting axle housing according to claim 1 hangs upside down the mechanism of bolt, it is characterised in that：The compression bar（2）On
It is machined with ladder shaft part（30）, the ladder shaft part（30）Upper location and installation has thrust bearing（15）, the thrust bearing（15）
Other end and umbrella guide plate（20）End face be in contact cooperation；The ladder shaft part（30）End pass through the first locking screw
It is female（14）And thrust bearing（15）It is fixed on circular plates（24）On.
5. a kind of press fitting axle housing according to claim 1 hangs upside down the mechanism of bolt, it is characterised in that：The gear ring engagement passes
Motivation structure includes cylinder（7）, the cylinder（7）Bottom end face be machined with rotating boss（27）, the rotating boss（27）With
Processing is in circular plates（24）The annular groove of upper surface（28）Composition is slidably matched；In cylinder（7）Top outer end fix peace
Equipped with external toothing（21）, in cylinder（7）Bottom inner end be installed with ring gear（22）, the ring gear（22）Be sleeved on
Compression bar（2）On pinion gear（23）Engaged transmission.
6. a kind of press fitting axle housing according to claim 1 hangs upside down the mechanism of bolt, it is characterised in that：The pneumatic rack machine
Structure includes rack（17）, the rack（17）With the external toothing of gear ring engagement transmission mechanism（21）Engaged transmission, the rack
（17）Rear ends be installed with guide rail（4）, the guide rail（4）Be fixedly mounted on support plate（10）On sliding block（5）
Composition is slidably matched, the rack（17）End be installed with push plate（6）, the push plate（6）Be fixed on support plate
（10）Cylinder on side wall（8）It matches, and pushes push plate（6）It is mobile.
7. a kind of press fitting axle housing according to claim 1 or 6 hangs upside down the mechanism of bolt, it is characterised in that：The pneumatic tooth
Mechanism shares two sets, and reverse symmetry arrangement is mounted on the external toothing of gear ring engagement transmission mechanism（21）Both sides.
8. a kind of press fitting axle housing according to claim 1 hangs upside down the mechanism of bolt, it is characterised in that：The lifting gear packet
Include oil cylinder（11）, the oil cylinder（11）It is fixedly mounted on oil cylinder fixed plate（12）On, the oil cylinder fixed plate（12）It is fixedly mounted
In support plate（10）End, the oil cylinder（11）Piston-rod end pass through screw shell（26）With umbrella guide plate（20）Phase
Even, the screw shell（26）Upper/lower terminal be set with and be useful for fixed thread sleeve（26）The second locking nut
（13）；The umbrella guide plate（20）With circular plates（24）Between pass through third locking nut（25）It is fixedly linked.
9. a kind of press fitting axle housing according to claim 1 or 8 hangs upside down the mechanism of bolt, it is characterised in that：The thread bush
Cylinder（26）Using outer-hexagonal head long sleeve, the two of which parallel surface of the outer-hexagonal head long sleeve and anti-oil cylinder rotating member（9）
Limit card slot（29）Composition is slidably matched, the anti-oil cylinder rotating member（9）It is fixedly mounted on support plate（10）Madial wall on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820177394.1U CN207858217U (en) | 2018-02-01 | 2018-02-01 | A kind of press fitting axle housing hangs upside down the mechanism of bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820177394.1U CN207858217U (en) | 2018-02-01 | 2018-02-01 | A kind of press fitting axle housing hangs upside down the mechanism of bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207858217U true CN207858217U (en) | 2018-09-14 |
Family
ID=63460668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820177394.1U Expired - Fee Related CN207858217U (en) | 2018-02-01 | 2018-02-01 | A kind of press fitting axle housing hangs upside down the mechanism of bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207858217U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213922A (en) * | 2018-02-01 | 2018-06-29 | 三峡大学 | A kind of mechanism and application method for being pressed axle housing and hanging upside down bolt |
| CN109772544A (en) * | 2019-03-06 | 2019-05-21 | 李金林 | A kind of pin-connected panel low speed crusher cavity |
-
2018
- 2018-02-01 CN CN201820177394.1U patent/CN207858217U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213922A (en) * | 2018-02-01 | 2018-06-29 | 三峡大学 | A kind of mechanism and application method for being pressed axle housing and hanging upside down bolt |
| CN109772544A (en) * | 2019-03-06 | 2019-05-21 | 李金林 | A kind of pin-connected panel low speed crusher cavity |
| CN109772544B (en) * | 2019-03-06 | 2024-04-09 | 李金林 | Assembled low-speed pulverizer cavity |
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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: 20180914 Termination date: 20190201 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |