CN207261144U - A kind of Design of High Pressure Common Rail Diesel Engine drives common rail pump idler gear erecting device - Google Patents
A kind of Design of High Pressure Common Rail Diesel Engine drives common rail pump idler gear erecting device Download PDFInfo
- Publication number
- CN207261144U CN207261144U CN201721098313.0U CN201721098313U CN207261144U CN 207261144 U CN207261144 U CN 207261144U CN 201721098313 U CN201721098313 U CN 201721098313U CN 207261144 U CN207261144 U CN 207261144U
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- Prior art keywords
- common rail
- hole
- supporter
- face
- idler gear
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Abstract
The utility model discloses a kind of Design of High Pressure Common Rail Diesel Engine to drive common rail pump idler gear erecting device, including drive end bearing bracket, supporter, cover board, thrust ring, large sealing packing ring, small sealing ring and positioning pin；Design of High Pressure Common Rail Diesel Engine idler gear mounting hole is provided with the drive end bearing bracket, supporter is arranged in idler gear mounting hole, cover board is arranged on the left end face center of supporter, small sealing ring is arranged on cover board right side, large sealing packing ring be arranged on supporter right side it is cylindrical on, thrust ring is arranged on its right end face center of supporter, and positioning pin is arranged in its right end face of supporter and connection corresponding with the lead to the hole site on thrust ring；Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device described in the utility model employs rational structure, solves the problem of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear handling and adjustment, the performance of Design of High Pressure Common Rail Diesel Engine is improved, makes the installation of common rail pump idler gear and maintenance very convenient.
Description
Technical field
The utility model belongs to Diesel Engine Mechanical manufacturing technology field, relates generally to a kind of Design of High Pressure Common Rail Diesel Engine driving altogether
Rail pumps idler gear erecting device.
Background technology
Design of High Pressure Common Rail Diesel Engine refers in common rail pump, pressure sensor and electronic control unit（ECU）The closed loop system of composition
In system, by the generation and course of injection of spraying pressure a kind of fuel feeding machine completely separate from each other.Its operation principle is：Crank teeth
Wheel drives idler gears at different levels, passes to common rail pump driver gear layer by layer, drive gear drives common rail pump work, by high pressure fuel
Common rail pipeline is transported to, the accurate oil pressure controlled in common rail pipe, significantly reduces Fuel Injection Mechanism of Diesel Engine pressure and become with engine speed
The degree of change, therewith, power performance, the emission performance of diesel engine are all greatly improved.Just because of all of common rail diesel engine
More advantages, more and more High speed and heavy duty diesel engines use high pressure co-rail system at present.
When designing Design of High Pressure Common Rail Diesel Engine, first have to consider the arrangement of common rail pump, that is, consider how design gear
Transmission system, imparts power to common rail pump.At present, working speed of many common rail pumps under declared working condition usually requires that
More than 2000rpm, common rail pump gear cannot be driven by cam shaft gear（Camshaft speed only has the half of speed of crankshaft）,
Crankshaft toothed wheel is needed directly or indirectly to drive.Therefore, common rail pump is installed on diesel engine certainly by many Design of High Pressure Common Rail Diesel Engine selections
By on the drive end bearing bracket held, duplicate gear is driven by crankshaft toothed wheel, then by duplicate gear canine tooth wheel drive idler gear, by center tooth
Two common rail pump gears of wheel drive, then drive common rail pump work；Since common rail pump transmission power is larger, to the peace of idler gear
Reload request is very high, while is also contemplated that the maintenanceability of driving common rail idler gear, it is desirable to which idler gear dismounting will facilitate, another
Aspect, idler gear generally use transmit the larger helical teeth wheel construction of power, this just inevitably makes idler gear produce axis
To thrust, how accurately to ensure gear axial thrust, by idler gear axial direction clearance control in the reasonable scope, and gear work
Make the key of reliability.
In current existing common rail diesel engine, there are problems with：
1. the idler gear of majority driving common rail pump is in dismounting, it is necessary to removes many such as drive end bearing bracket
Annex, dismantles complex process, and maintainability is poor, as Design of High Pressure Common Rail Diesel Engine driving common rail pump intermediate gear shaft is installed on
The both ends of gear housing, are switched on gear housing when dismantling idler gear, dismounting process is more complicated；
2. intermediate gear shaft both ends are separately mounted on drive end bearing bracket and body, in adjustment idler gear
When, thrust ring is often used, the adjustment of thickness is carried out when using thrust ring, it is also necessary to opens drive end bearing bracket progress
Operation, adjustment process are very cumbersome；
2. the lubricant effect effect of intermediate gear assemblies is not so good, it is caused to directly influence entirely
The reliability of gear train, the lubricating condition of sustained improvement gear are very necessary.
Therefore a kind of more rational device is needed to solve existing Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear
Handling are difficult, the problem of adjustment inconvenience and lack of lubrication.
The content of the invention
The purpose of this utility model is to propose that the utility model aim is to propose that one kind is convenient for disassembly and assembly, axial thrust performance is good
Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device good, lubrication is abundant, reliability is high, realizes idler gear
Easy disassembly.
The purpose of this utility model can be adopted the following technical scheme that to realize：
A kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device includes drive end bearing bracket, supporter, cover board, only
Throw-out collar, large sealing packing ring, small sealing ring and positioning pin；The installation of Design of High Pressure Common Rail Diesel Engine idler gear is provided with the drive end bearing bracket
Hole, supporter are arranged in idler gear mounting hole, and cover board is arranged on the left end face center of supporter, and small sealing ring is arranged on
On cover board right side, large sealing packing ring be arranged on supporter right side it is cylindrical on, thrust ring is arranged in its right end face of supporter,
Positioning pin is arranged in its right end face of supporter and connection corresponding with the lead to the hole site on thrust ring, and the right side of thrust ring is with
Between gear left end face contact, the right side of supporter is connected with intermediate gear shaft left end face；Outside the supporter
Circle is multidiameter structure, is provided with a supporter annular groove on its medium and small multi-diameter shaft is cylindrical, has in small multi-diameter shaft its right end face
One annular lightening grooves, the center line of lightening grooves are overlapped with support body axis, surround in the big multi-diameter shaft left end face of supporter
Support body axis is evenly equipped with threaded hole III and through hole I for one week respectively, and on the outside, threaded hole III is in inner side, and through hole I is with setting for through hole I
Put and corresponded in drive end bearing bracket threaded hole, is fixedly connected with supporter with drive end bearing bracket by connecting bolt I, the supporter left-hand end
Left side stepped hole I is provided with face, right side stepped hole II is provided with its right end face, interstitial hole is arranged on left side stepped hole I
Bottom center simultaneously communicates with right side stepped hole II, and interstitial hole and left side stepped hole I and right side stepped hole II are coaxial, right side stepped hole
II with the cylindrical clearance fit of small multi-diameter shaft of intermediate gear shaft, equal around support body axis on the end face in left side stepped hole I
It is even to be provided with through hole II, through hole II respectively with II position correspondence of threaded hole in the small multi-diameter shaft left end face of intermediate gear shaft,
Supporter is fixedly connected with intermediate gear shaft by connecting bolt III.
Cover plate through hole is evenly distributed with around cover board axis in the cover board left end face, is set on the inside of its right end face upper cover plate through hole
Have a cover board annular groove, cover plate through hole respectively with III position correspondence of threaded hole in supporter left end face, by connecting bolt II
Cover board is fixed on supporter, a threaded hole I is provided among cover board.
The thrust ring is cyclic structure, and it is clearance fit that the small multi-diameter shaft of endoporus and intermediate gear shaft is cylindrical, thrust ring
There is a through hole on end face.
The positioning pin is a cylindrical-shaped structure, small multi-diameter shaft its right end face on the cylindrical one end of positioning pin and supporter
On blind hole interference fit, the via clearance on the other end and thrust ring coordinates.
The large sealing packing ring is annular, and large sealing packing ring is cylindrical to be bonded with idler gear mounting hole endoporus on drive end bearing bracket.
The large sealing packing ring is arranged in the cylindrical upper supporter annular groove of the small multi-diameter shaft of supporter, large sealing packing ring it is cylindrical with
The mounting hole inner headed face fitting of drive end bearing bracket.
The small sealing ring is installed in cover board its right end face upper cover plate annular groove, small sealing ring its right end face and support
The left end face fitting of the big multi-diameter shaft of body.
The connection bolt I is interior six sides high intensity band retaining pad bolt, and connection bolt II is outer six sides high intensity band
Retaining pad bolt.
Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device described in the utility model employs reasonably
Structure, solves the problem of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear handling and adjustment, improves high-pressure common rail bavin
The performance of oil machine：Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device makes installation and the dimension of common rail pump idler gear
Repair very convenient；Lubrication system uses force feed, and machine oil flow velocity is high, flow is big, fuel feeding is abundant, and lubricating efficiency is high, part
Functional reliability height improves the lubricating system of common rail pump idler gear, realizes that the comprehensive performance of Design of High Pressure Common Rail Diesel Engine carries
Rise.
Brief description of the drawings
Fig. 1 is the assembling structure sectional view in the utility model；
Fig. 2 is the intermediate gear shaft sectional view in the utility model；
Fig. 3 is the idler gear sectional view in the utility model；
Fig. 4 is the supporting body structure sectional view in the utility model；
In figure：1st, intermediate gear shaft, 2, idler gear, 3, thrust ring, 4, supporter, 5, large sealing packing ring, 6, drive end bearing bracket,
7th, connect bolt I, 8, connection bolt II, 9, cover board, 10, threaded hole I, 11, small sealing ring, 12, positioning pin, 13, thrust surface I,
14th, radial direction oil hole, 15, axial oilhole, 16, threaded hole II, 17, bushing, 18, thrust surface II, 19, thrust surface III, 20, through hole
I, 21, threaded hole III, 22, stepped hole I, 23, interstitial hole, 24, blind hole, 25, stepped hole II, 26, through hole II, 27, connection bolt
III, 28, supporter annular groove, 29, cover board annular groove, 30, idler gear mounting hole, 31, threaded hole, 32, cover plate through hole.
Embodiment
The utility model is further described with reference to the accompanying drawings and detailed description：
Explanation the utility model that can be detailed by the following examples, open the purpose of this utility model are intended to protect
All technological improvements in the scope of the utility model.
As shown in Figure 1,2,3, 4, a kind of common rail diesel engine driving common rail pump idler gear erecting device include drive end bearing bracket 6,
Supporter 4, cover board 9, thrust ring 3, large sealing packing ring 5, small sealing ring 11 and positioning pin 12；Height is provided with the drive end bearing bracket 6
Common rail diesel engine idler gear mounting hole 30 is pressed, supporter 4 is arranged in idler gear mounting hole 30, and cover board 9 is arranged on support
The left end face center of body 4, small sealing ring 11 are arranged on the right side of cover board 9, and large sealing packing ring 5 is arranged on the right side of supporter 4
On side is cylindrical, thrust ring 3 is arranged on its right end face center of supporter 4, and positioning pin 12 is arranged in its right end face of supporter 4
And connection corresponding with the lead to the hole site on thrust ring 3, the right side of thrust ring 3 are connected with the left end face of idler gear 2, branch
The inner circle of its right end face upper shoulder hole of support body 4 and the cylindrical mating connection in the left side of intermediate gear shaft 1, its right end face of supporter 4
Upper shoulder hole inner face is connected with 1 left end face of intermediate gear shaft；It is a multi-diameter shaft that the supporter 4 is cylindrical, small rank
Supporter annular groove 28 is provided with terraced axis is cylindrical, has an annular lightening grooves and blind hole 24 in small multi-diameter shaft its right end face, subtracts
The center of Baking soda is overlapped with 4 axis of supporter, and six screw threads are evenly distributed with respectively around 4 axis of supporter in big multi-diameter shaft left end face
Hole III 21 and six through holes I 20, threaded hole III 21 in inner side, through hole I 20 on the outside, six through holes I 20 respectively with drive end bearing bracket
Six threaded holes 31 correspond to, by six connection bolts III 27 supporter 4 is fixedly connected with drive end bearing bracket 6, the support
Left side stepped hole I 22 is provided with 4 left end face of body, right side stepped hole II 25 is provided with its right end face, interstitial hole 23 is set
The bottom center of stepped hole I 22 and communicated in left side with right side stepped hole II 2, interstitial hole 23 and left side stepped hole I 22 and right side
Stepped hole II 25 is coaxial, the cylindrical clearance fit of small multi-diameter shaft of right side stepped hole II 25 and intermediate gear shaft 1, in left side stepped hole
Six through holes II 26 are evenly distributed with around support body axis, this six through holes II 26 small rank with intermediate gear shaft 1 respectively on I 22 end faces
Six threaded holes II 16 in terraced axis left end face correspond to, and bolts III 27 are connected by supporter 4 and intermediate gear shaft 1 by six
It is fixedly connected；In 9 left end face of cover board six cover plate through holes 32, this six cover plate through holes 32 are evenly distributed with around 9 axis of cover board
Respectively with six III 21 faces of threaded hole on 4 left side ladder hole end surface of supporter, bolts II 8 are connected by cover board 9 by six
It is fixed on supporter 4, has a threaded hole I 10 among cover board 9, cover board annular groove 29 is provided with 9 its right end face of cover board；Institute
It is cyclic structure to state thrust ring to include thrust ring 3, and the cylindrical small multi-diameter shaft of endoporus and intermediate gear shaft 1 is that larger gap is matched somebody with somebody
Close, be provided with through hole on 3 end face of thrust ring, left end face is bonded with its right end face of supporter 4；The positioning pin 12 is one
Cylindrical-shaped structure, the cylindrical one end of positioning pin 12 are interference fitted with the blind hole 24 on supporter 4 in small multi-diameter shaft its right end face, separately
One end coordinates with the via clearance on thrust ring 3.The large sealing packing ring 5 be installed on 4 small multi-diameter shaft of supporting mass it is cylindrical on branch
In support body annular groove 28, the cylindrical endoporus fitting corresponding with drive end bearing bracket 6 of large sealing packing ring 5.The small sealing ring 11 is installed on
In cover board annular groove 29 in 9 its right end face of cover board, 11 its right end face of small sealing ring and the left end face of 4 big multi-diameter shaft of supporter
Fitting；The component being connected with Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device includes intermediate gear shaft 1 with
Between gear 2, the cylindrical of intermediate gear shaft 1 is two multi-diameter shafts, and the left end face 13 of big multi-diameter shaft uses surface Hardening Treatment, in
Between the center of gear shaft 1 have a radial direction oil hole 14, there are an axial oilhole 15, radial direction oil hole 14 in the cylindrical centre of small multi-diameter shaft
Communicated with axial oilhole 15, in the small multi-diameter shaft left end face of intermediate gear shaft 1, surround the center line of intermediate gear shaft 1, circumferentially
Direction is evenly distributed with six threaded holes；The cylindrical of the idler gear 2 is a multi-diameter shaft, and with teeth, centre is respectively provided with big multi-diameter shaft
The endoporus of gear 2 has two stepped holes, has a bushing 17 to be interference fitted therewith on small stepped hole, big stepped hole and small stepped hole
Left end face 18 and 19 be respectively adopted surface Hardening Treatment, big stepped hole left end face 18 and the big ladder of intermediate gear shaft 1
Axis left end face 13 is bonded.
In a kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device described in the utility model, center tooth
The disassembly process of wheel 2：When idler gear 2 is installed, first positioning pin 12 and thrust ring 3 are installed on supporter 4, then by center tooth
Wheel 2 is sleeved on intermediate gear shaft 1, intermediate gear shaft is fixed on supporter 4 by connecting bolt III 27, by large sealing packing ring
5 are installed on supporter 4, supporter component then are fixed on drive end bearing bracket 6 by connecting bolt I 7, then by small sealing ring 11
Cover board is fixed on supporter 4 installed in cover board 9, then by connecting bolt II 8, you can complete the installation of idler gear 2；Tear open
When unloading idler gear, it is only necessary to which the connection bolt I on drive end bearing bracket of dismantling, takes out supporter and other components, due in
Between gear 2 tip diameter be less than drive end bearing bracket installation bore dia, both are there are gap " A ", and idler gear 2 is by before related taking-up
End cap, can conveniently detect the abrasion condition of idler gear 2, disassembly process is very easy at this time, it is not necessary to remove drive end bearing bracket and
Other annexes, removal efficiency is high, and time saving and energy saving；A kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear installation
In device, the thrust principle of idler gear 2：Idler gear 2 be installed on thrust ring 3 and intermediate gear shaft 1 thrust surface I 13 it
Between, thrust ring 3 is divided into some shelves by different-thickness, by selecting the thrust ring 3 of different-thickness, by the axial motion of idler gear
Amount control is at zone of reasonableness " B "；A kind of lubrication of the Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device
Principle：Pressure machine oil enters the stepped hole I 22 of supporter from external machine oil pipe via 9 interstitial hole 10 of cover board, then passes through interstitial hole
23 enter intermediate gear shaft 1, lubricate 17 hole of intermediate gear bushing and center tooth respectively by longitudinal oilhole 15 and radial direction oil hole 14
Wheel shaft 1, the thrust surface II 18 of idler gear 2 are with the thrust surface I 13 of intermediate gear shaft 1, the thrust surface III 19 of idler gear with stopping
Throw-out collar its right end face, whole greasing use force feed, and fuel feeding is abundant, meets the requirement of each lubricated surface, effectively
Improve the reliability of idler gear work.
The non-detailed portion of the utility model is the prior art.
Claims (8)
1. a kind of Design of High Pressure Common Rail Diesel Engine drives common rail pump idler gear erecting device, it is characterized in that：Including drive end bearing bracket, support
Body, cover board, thrust ring, large sealing packing ring, small sealing ring and positioning pin；It is provided with the drive end bearing bracket in Design of High Pressure Common Rail Diesel Engine
Between pinion mounting holes, supporter is arranged in idler gear mounting hole, and cover board is arranged on the left end face center of supporter, small close
Seal is arranged on cover board right side, large sealing packing ring be arranged on supporter right side it is cylindrical on, thrust ring is arranged on supporter
Its right end face center, positioning pin is arranged in its right end face of supporter and connection corresponding with the lead to the hole site on thrust ring, only
The right side of throw-out collar and the left end face of idler gear connect, the inner circle and center tooth of its right end face upper shoulder hole of supporter
Cylindrical mating connection, its right end face upper shoulder hole inner face of supporter contact company with intermediate gear shaft left end face on the left of wheel shaft
Connect；The cylindrical supporter is a multi-diameter shaft, has a supporter annular groove, small multi-diameter shaft right-hand end on small multi-diameter shaft is cylindrical
There are annular a lightening grooves and blind hole, the center line of lightening grooves to be overlapped with support body axis on face, in big multi-diameter shaft left end face
Support body axis is provided with threaded hole III and through hole I, threaded hole III is in center, and through hole I on the outside, distinguish by through hole I
With the threaded hole position correspondence on drive end bearing bracket, supporter is fixedly connected with drive end bearing bracket by connecting bolt I, the supporter
Left side stepped hole I is provided with left end face, right side stepped hole II is provided with its right end face, interstitial hole is arranged on left side ladder
The bottom center in hole I simultaneously communicates with right side stepped hole II, and interstitial hole and left side stepped hole I and right side stepped hole II are coaxial, right side
The cylindrical clearance fit of small multi-diameter shaft of stepped hole II and intermediate gear shaft, around supporter on the end face in left side stepped hole I
Axis is evenly arranged with through hole II, through hole II respectively with II position of threaded hole in the small multi-diameter shaft left end face of intermediate gear shaft
It is corresponding, supporter is fixedly connected with intermediate gear shaft by connecting bolt III.
2. a kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device according to claim 1, its feature
It is：Cover plate through hole is evenly distributed with around cover board axis in the cover board left end face, lid is provided with the inside of its right end face upper cover plate through hole
Plate annular groove, cover plate through hole respectively with III position correspondence of threaded hole on the left of supporter on ladder hole end surface, by connecting bolt
II is fixed on cover board on supporter, and a threaded hole I is provided among cover board.
3. a kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device according to claim 1, its feature
It is：The thrust ring is cyclic structure, and it is clearance fit that the small multi-diameter shaft of endoporus and intermediate gear shaft is cylindrical, on thrust ring end face
There is a through hole.
4. a kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device according to claim 1, its feature
It is：The positioning pin is a cylindrical-shaped structure, on the cylindrical one end of positioning pin and supporter in small multi-diameter shaft its right end face
Blind hole is interference fitted, and the other end coordinates with the via clearance on thrust ring.
5. a kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device according to claim 1, its feature
It is：The large sealing packing ring is annular, and large sealing packing ring is cylindrical to be bonded with idler gear mounting hole endoporus on drive end bearing bracket.
6. a kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device according to claim 1, its feature
It is：The large sealing packing ring is arranged in the cylindrical upper supporter annular groove of the small multi-diameter shaft of supporter, and large sealing packing ring is cylindrical and front end
The mounting hole inner headed face fitting of lid.
7. a kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device according to claim 1, its feature
It is：The small sealing ring is installed in cover board its right end face upper cover plate annular groove, and small sealing ring its right end face and supporter are big
The left end face fitting of multi-diameter shaft.
8. a kind of Design of High Pressure Common Rail Diesel Engine driving common rail pump idler gear erecting device according to claim 1, its feature
It is：The connection bolt I is interior six sides high intensity band retaining pad bolt, and connection bolt II is outer six sides high intensity band retaining pad
Bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721098313.0U CN207261144U (en) | 2017-08-30 | 2017-08-30 | A kind of Design of High Pressure Common Rail Diesel Engine drives common rail pump idler gear erecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721098313.0U CN207261144U (en) | 2017-08-30 | 2017-08-30 | A kind of Design of High Pressure Common Rail Diesel Engine drives common rail pump idler gear erecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207261144U true CN207261144U (en) | 2018-04-20 |
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ID=61922689
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721098313.0U Expired - Fee Related CN207261144U (en) | 2017-08-30 | 2017-08-30 | A kind of Design of High Pressure Common Rail Diesel Engine drives common rail pump idler gear erecting device |
Country Status (1)
| Country | Link |
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| CN (1) | CN207261144U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420240A (en) * | 2017-08-30 | 2017-12-01 | 河南柴油机重工有限责任公司 | A kind of Design of High Pressure Common Rail Diesel Engine drives common rail pump idler gear erecting device |
| CN112112934A (en) * | 2020-11-23 | 2020-12-22 | 常州长浪齿轮箱有限公司 | High-load-sharing double-screw extruder gear box and method for adjusting phase of matched gears |
-
2017
- 2017-08-30 CN CN201721098313.0U patent/CN207261144U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420240A (en) * | 2017-08-30 | 2017-12-01 | 河南柴油机重工有限责任公司 | A kind of Design of High Pressure Common Rail Diesel Engine drives common rail pump idler gear erecting device |
| CN112112934A (en) * | 2020-11-23 | 2020-12-22 | 常州长浪齿轮箱有限公司 | High-load-sharing double-screw extruder gear box and method for adjusting phase of matched gears |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 Termination date: 20200830 |
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| CF01 | Termination of patent right due to non-payment of annual fee |