CN108119612A - A kind of efficient single-screw extruder gearbox - Google Patents
A kind of efficient single-screw extruder gearbox Download PDFInfo
- Publication number
- CN108119612A CN108119612A CN201810114488.9A CN201810114488A CN108119612A CN 108119612 A CN108119612 A CN 108119612A CN 201810114488 A CN201810114488 A CN 201810114488A CN 108119612 A CN108119612 A CN 108119612A
- Authority
- CN
- China
- Prior art keywords
- babinet
- gear
- bearing
- output shaft
- jackshaft
- 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.)
- Pending
Links
- 230000013011 mating Effects 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 230000017525 heat dissipation Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 31
- 238000001125 extrusion Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000010146 3D printing Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation 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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
- F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A kind of efficient single-screw extruder gearbox, with babinet, input shaft is equipped in babinet, jackshaft and output shaft, input shaft is equipped with input gear, jackshaft is equipped with intermediate gear, output shaft is equipped with output gear, input gear is driven by input shaft, jackshaft follows input gear to rotate, drive output gear, the output gear connects close-fitting in output shaft middle position by key-groove, the front end of the output shaft is and the matching used hollow-core construction of screw rod, self-aligning thrust roller bearing is provided on the output shaft, the self-aligning thrust roller bearing is mounted on babinet center rearward position, the mating screw rod is disposed adjacent to the position at babinet center, before making, the radial load that bearing is born afterwards is uniform, the depth of parallelism between axis is also ensured simultaneously, reduce the jump of screw rod footpath and noise.
Description
Technical field
The present invention relates to rubber, plastics, chemical fiber extruder correlation corollary equipment field, particularly with regard to a kind of efficient list
Screw extruder gear-box.
Background technology
Single-screw extruder gearbox is driving section of the high-precision Hardened gear face with thrust bearing for extrusion equipment Aided design
Point, it is to be driven to input by motor, required output torque is reached by The gear deceleration, in the front-end configuration of hollow output shaft
Thrust metal, bear from screw rod work when the axial force that generates.
Traditional single-screw extruder gearbox needs to lengthen 150mm--300mm again in the front end of output shaft(Thrust bearing type
Length is different number needed for difference)Carry out installed thrust bearing, so both add cost, returning processing makes troubles, and stretches out simultaneously
Part exactly with screw rod coupling part, makes screw rod shank rest on outside babinet, when screw rod, which works, generates radial forces,
Fore bearing becomes fulcrum, and rear bearing will bear five times or more of radial load(Spiro rod length is five times of output shaft or more).Cause
Hereafter bearing generally all uses self-aligning bearing, although surface solves radial load, actually accelerates the mill of screw rod and oil sealing
Damage, while also without the depth of parallelism between two axis, the product produced is just without stability.
A kind of patent of invention of Chinese Publication No. CN204921929U discloses a kind of in single screw extrusion machine
High speed high torque gear-box, and disclose following technical solution:Babinet is equipped with a pair of mistake opposite, for wearing transition axis
Axle bearing hole is crossed, transition axis bearing outer end of hole is equipped with end cover, and the input shaft, jackshaft and output shaft pass through setting respectively
Bearing rotational support in babinet bearing hole is equipped with position between the end cap and bearing on babinet, being arranged at babinet bearing hole
A pair of of double-lip is respectively equipped between end cap at the shaft of adjustment ring in babinet bearing hole, the input shaft and output shaft
Backbone sealing ring.Although it can be as needed, which is upgraded into three-level uni-drive gear box, to expand gear
The transmission speed ratio section of case, so as to save babinet cost, but there are still following shortcoming and deficiency:
1. the output shaft of single-screw extruder gearbox is because there is very long thrust metal in front, so screw rod and gear
The output shaft link position of case is only in one end of fore bearing, and the output shaft of gear-box is in insertion screw rod(Spiro rod length generally has
Five times of the width of gear-box)Afterwards, the depth of parallelism of screw rod and output shaft can only be ensured in short term, along with Screw Extrusion when can also generate
Radial forces are easily damaged bearing and oil sealing.
2. the lubrication of single-screw extruder gearbox thrust metal is provided by oil pump, then passes through babinet preformed hole
Complete oil return, preformed hole causes oil return to be not thorough, the high temperature that thrust bearing continuously runs generation can cause in the lower section of oil level
Oil temperature can rise rapidly, directly affect the service life of bearing and oil sealing.
Summary, structure type is susceptible to shake and height when running at high speed as traditional single-screw extruder gearbox
Temperature, can only low-speed running, efficiency is low, of high cost, and service life is short or even some diameters jump and require higher product can't
Enough production.
The content of the invention
It is an object of the invention to provide a kind of jump of reduction screw rod footpath and noises, and greasy property is good, and bearing and oil sealing use
Service life is high, while reduces a kind of efficient single-screw extruder gearbox of production cost.
The object of the present invention is achieved like this:A kind of efficient single-screw extruder gearbox has babinet, in babinet
Equipped with input shaft, jackshaft and output shaft, input shaft is equipped with input gear, and jackshaft is equipped with intermediate gear, on output shaft
Equipped with output gear, input gear is driven by input shaft, jackshaft follows input gear to rotate, and drives output gear, feature
It is:The output gear connects close-fitting in output shaft middle position, the front end of the output shaft by key-groove
Be with the matching used hollow-core construction of screw rod, self-aligning thrust roller bearing, the thrust force aligning rolling are provided on the output shaft
Sub- bearing is mounted on babinet center rearward position, and the mating screw rod is disposed adjacent to the position at babinet center, makes forward and backward bearing
The radial load born is uniform.
As further technical solution, the output shaft both ends are respectively arranged with cylinder roller bearing and the 3rd zanjon
Ball bearing, and pass through one closing of Rear oil seal and Front oil seal composition, impregnate self-lubricating in the babinet of self-aligning thrust roller bearing
System.
As further technical solution, the babinet front and rear sides are provided with multiple for flange screw connection, oil
Oil pump feed connects or the boss of dress water pipe;Be provided at left and right sides of the babinet can increase cover board intensity and
The corrugated type cover board of heat dissipation area can be increased, 1 upside of babinet is provided with regarding cap bore and abat-vent.
Technical solution as priority, the Bearning mechanism of the input shaft include the first taper roll bearing that front end is set
The first taper roll bearing, the first deep groove ball bearing set with rear end, the input shaft front end is provided with oil pump, rear end
The lubricating system of bearing of input shaft mechanism is made up of oil pump end cap and the first oil sealing;The Bearning mechanism of the jackshaft includes two
Symmetrically arranged second taper roll bearing is held, the jackshaft is provided with preceding sealing cover and rear sealing cover.
As further technical solution, between the intermediate gear of the jackshaft and the second taper roll bearing of front end
The first distance collar is arranged with, the second distance collar is arranged between the 3rd deep groove ball bearing and output gear of the output shaft, is protected
Demonstrate,prove the depth of parallelism between two axis.
The present invention can effectively promote the precision of single-screw extruder gearbox, on the one hand reduce the jump of screw rod footpath, be applicable in
In the higher product of domestic and international required precision such as pen core, LED lamp cover, 3D printing equipment etc., the opposing party lessen noise and
Oil leak probability, suitable for the higher industry of environmental requirement(Such as cure equipment), improve yield and yield rate, reduce operation into
This.
Figure of description
Fig. 1 is the structure diagram of traditional single-screw extruder gearbox;
Fig. 2 is the structure diagram of the present invention;
Fig. 3 is the N-N sectional views of Fig. 2;
Fig. 4 is the Q direction views of Fig. 2;
Fig. 5 is the P direction views of Fig. 4;
Fig. 6 is the K direction views of Fig. 2.
1 babinet in figure;2 regard cap bore;3 input shafts;4 input gears;5 jackshafts;6 intermediate gears;7 output shafts;8 transparent covers;9
Second distance collar;10 first distance collars;11 oil pump end caps;12 shaft end rings;Sealing cover after 13;14 oil pumps;15 hanging ring screws;16
Abat-vent;17 circular oil scales;18 connecting tubes;19 hexagonal socket head plugs;20 combination sealing pads;21 first taper roll bearings;22
One deep groove ball bearing;23 first oil sealings;24 first keyways;25 second taper roll bearings;26 hole baffle rings;27 Rear oil seals;28
Cylinder roller bearing;29 self-aligning thrust roller bearings;30 key-grooves, 31 output gears;32 the 3rd deep groove ball bearings;It is oily before 33
Envelope;Sealing cover before 34;35 second keyways;36 boss;37 corrugated type cover boards.
Specific embodiment
The nonrestrictive concrete structure for disclosing the embodiment of the present invention of attached drawing, below in conjunction with the accompanying drawings makees the present invention into one
The description of step.
A kind of efficient single-screw extruder gearbox has babinet 1, and input shaft 3, jackshaft 5 and defeated are equipped in babinet 1
Shaft 7, input shaft 3 are equipped with input gear 4, and jackshaft 5 is equipped with intermediate gear 6, and output shaft 7 is equipped with output gear 31,
Input gear 4 is driven by input shaft 3, jackshaft 5 follows input gear 4 to rotate, and drives output gear 31, the output gear
31 connect close-fitting in 7 middle position of output shaft by key-groove 30, and the front end of the output shaft 7 is and screw rod is mating makes
Hollow-core construction, the output shaft 7 eliminate thrust metal, and self-aligning thrust roller bearing 29 is mounted on 1 center of babinet
Rearward position, the mating screw rod have been moved backward to close to the position at 1 center of babinet, the radial direction for bearing forward and backward bearing
Power is uniform, while also ensures the depth of parallelism between axis.
7 both ends of output shaft are respectively arranged with 28 and the 3rd deep groove ball bearing 32 of cylinder roller bearing, and after passing through
One closing of oil sealing 27 and the composition of Front oil seal 33, impregnate self lubricating system in the babinet of self-aligning thrust roller bearing 29.Thrust
Self-aligning roller bearing 29 is immersed in babinet 1 in lubricating oil, and oil is thrown away in rotation process, just automatic row into pair
Stream solves traditional single-screw extruder gearbox thrust bearing easily fever and Leakage caused by oil return is not smooth.
1 front and rear sides of babinet are provided with boss 36, and boss 36 is with efficient single screw extrusion machine gear
The variation of case diversification assembling form, serves different.As being flange screw connection during I, II, III, IV type motor direct-connected
Hole thongs and makees oil pump feed connection use or dress water pipe use when taking turns;1 left and right sides of babinet is provided with corrugated type cover board
37, not only beautiful but also increase cover board intensity, moreover it is possible to increase heat dissipation area;1 upside of babinet is provided with regarding cap bore 2 and ventilation
Cap 16.
The Bearning mechanism of the input shaft 3 includes first that the first taper roll bearing 21 that front end is set is set with rear end
Taper roll bearing 21, the first deep groove ball bearing 22,3 front end of input shaft are provided with oil pump 14, and rear end passes through oil pump
11 and first oil sealing 23 of end cap forms the lubricating system of 3 Bearning mechanism of input shaft.
The Bearning mechanism of the jackshaft 5 includes symmetrically arranged second taper roll bearing 25 in both ends, the jackshaft 5
It is provided with preceding sealing cover 34 and rear sealing cover 13.
The first distance collar is arranged between the intermediate gear 6 of the jackshaft 5 and the second taper roll bearing 25 of front end
10, be arranged with the second distance collar 9 between the 3rd deep groove ball bearing 32 of the output shaft 7 and output gear 31, ensure two axis it
Between the depth of parallelism, strengthen the stability of product produced.
The present invention can effectively promote the precision of single-screw extruder gearbox, higher suitable for domestic and international required precision
Product such as pen core, LED lamp cover, 3D printing equipment etc., noise and oil leak probability are reduced, suitable for the higher row of environmental requirement
Industry(Such as medical equipment), yield and yield rate are improved, reduces operating cost.
The popularization of the present invention can at least save three kiloton of iron ore deposit every year(It is produced per year by medium-sized and small enterprises based on 8,000
It calculates), can also be the rack length that mating user saves 150mm--300mm(The hollow industry rack weight saved will much
The weight saved more than gear-box)With the solid space for vacateing same ratio.
Claims (6)
1. a kind of efficient single-screw extruder gearbox has babinet, input shaft, jackshaft and output shaft are equipped in babinet, it is defeated
Enter axis equipped with input gear, jackshaft is equipped with intermediate gear, and output shaft is equipped with output gear, is driven and inputted by input shaft
Gear, jackshaft follow input gear to rotate, and drive output gear, it is characterised in that:The output gear passes through the 3rd key
Slot connects close-fitting in output shaft middle position, and the front end of the output shaft is and the matching used hollow-core construction of screw rod, institute
It states and self-aligning thrust roller bearing is provided on output shaft, the self-aligning thrust roller bearing is mounted on the position of babinet center rearward
It puts, the mating screw rod is disposed adjacent to the position at babinet center, makes the radial load that forward and backward bearing is born uniform.
2. a kind of efficient single-screw extruder gearbox according to claim 1, it is characterised in that:The output shaft two
End is respectively arranged with cylinder roller bearing and the 3rd deep groove ball bearing, and passes through one closing of Rear oil seal and Front oil seal composition,
Impregnate self lubricating system in the babinet of self-aligning thrust roller bearing.
3. a kind of efficient single-screw extruder gearbox according to claim 2, it is characterised in that:Before and after the babinet
Both sides are provided with multiple boss for flange screw connection, oil pump feed connection or dress water pipe;The babinet
The left and right sides is provided with the corrugated type cover board that can increase cover board intensity and increase heat dissipation area, and 1 upside of babinet is set
It is equipped with regarding cap bore and abat-vent.
4. a kind of efficient single-screw extruder gearbox according to claim 3, it is characterised in that:The axis of the input shaft
Holding mechanism includes the first taper roll bearing, the first deep-groove ball axis that the first taper roll bearing that front end is set is set with rear end
It holds, the input shaft front end is provided with oil pump, and rear end forms bearing of input shaft mechanism by oil pump end cap and the first oil sealing
Lubricating system.
5. a kind of efficient single-screw extruder gearbox according to claim 3, it is characterised in that:The axis of the jackshaft
Holding mechanism includes symmetrically arranged second taper roll bearing in both ends, and the jackshaft is provided with preceding sealing cover and rear sealing cover.
6. a kind of efficient single-screw extruder gearbox according to any one of claim 2-5, it is characterised in that:It is described
It is arranged with the first distance collar between the intermediate gear of jackshaft and the second taper roll bearing of front end, the 3rd of the output shaft the
The second distance collar is arranged between deep groove ball bearing and output gear, ensures the depth of parallelism between two axis.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201810114488.9A CN108119612A (en) | 2018-02-06 | 2018-02-06 | A kind of efficient single-screw extruder gearbox |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810114488.9A CN108119612A (en) | 2018-02-06 | 2018-02-06 | A kind of efficient single-screw extruder gearbox |
Publications (1)
Publication Number | Publication Date |
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CN108119612A true CN108119612A (en) | 2018-06-05 |
Family
ID=62234192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201810114488.9A Pending CN108119612A (en) | 2018-02-06 | 2018-02-06 | A kind of efficient single-screw extruder gearbox |
Country Status (1)
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CN (1) | CN108119612A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109253235A (en) * | 2018-11-29 | 2019-01-22 | 江阴齿轮箱制造有限公司 | Compact modular plastic extruder special gear box |
CN109340353A (en) * | 2018-12-04 | 2019-02-15 | 常州长浪齿轮箱有限公司 | Extruder gearbox |
CN109372976A (en) * | 2018-12-04 | 2019-02-22 | 常州长浪齿轮箱有限公司 | Easy-to-mount extruder gearbox |
CN111271434A (en) * | 2020-03-13 | 2020-06-12 | 上海研一重工机械有限公司 | Special gear box for cold cutting flying saw machine |
CN112013083A (en) * | 2020-09-27 | 2020-12-01 | 苏州苏文电器有限公司 | Anti-skid gear box |
CN115549378A (en) * | 2022-10-11 | 2022-12-30 | 南京高精齿轮集团有限公司 | Drive device and extruder |
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CN200958584Y (en) * | 2006-09-25 | 2007-10-10 | 南京高精齿轮集团有限公司 | Output mechanism in main speed reducer for single-screw extruder |
CN201794994U (en) * | 2010-08-31 | 2011-04-13 | 常州减速机总厂有限公司 | Speed reducer of extruder |
CN202241890U (en) * | 2011-09-02 | 2012-05-30 | 江阴齿轮箱制造有限公司 | Decelerator of rubber single-screw extruder |
CN203239885U (en) * | 2013-05-02 | 2013-10-16 | 杭州前进齿轮箱集团股份有限公司 | Gear case for plastic extruding machine |
CN104343893A (en) * | 2014-10-31 | 2015-02-11 | 江苏泰隆减速机股份有限公司 | Brick press speed reducer convenient to connect |
CN105673818A (en) * | 2016-04-20 | 2016-06-15 | 南京宁嘉机电有限公司 | Main gearbox assembly of single-screw extruder and application of main gearbox assembly |
CN205918877U (en) * | 2016-07-14 | 2017-02-01 | 江阴齿轮箱制造有限公司 | Single screw plastic extruding machine gear box with water cooling plant |
CN207830470U (en) * | 2018-02-06 | 2018-09-07 | 宜兴市台科实业有限公司 | A kind of efficient single-screw extruder gearbox |
-
2018
- 2018-02-06 CN CN201810114488.9A patent/CN108119612A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN200958584Y (en) * | 2006-09-25 | 2007-10-10 | 南京高精齿轮集团有限公司 | Output mechanism in main speed reducer for single-screw extruder |
CN201794994U (en) * | 2010-08-31 | 2011-04-13 | 常州减速机总厂有限公司 | Speed reducer of extruder |
CN202241890U (en) * | 2011-09-02 | 2012-05-30 | 江阴齿轮箱制造有限公司 | Decelerator of rubber single-screw extruder |
CN203239885U (en) * | 2013-05-02 | 2013-10-16 | 杭州前进齿轮箱集团股份有限公司 | Gear case for plastic extruding machine |
CN104343893A (en) * | 2014-10-31 | 2015-02-11 | 江苏泰隆减速机股份有限公司 | Brick press speed reducer convenient to connect |
CN105673818A (en) * | 2016-04-20 | 2016-06-15 | 南京宁嘉机电有限公司 | Main gearbox assembly of single-screw extruder and application of main gearbox assembly |
CN205918877U (en) * | 2016-07-14 | 2017-02-01 | 江阴齿轮箱制造有限公司 | Single screw plastic extruding machine gear box with water cooling plant |
CN207830470U (en) * | 2018-02-06 | 2018-09-07 | 宜兴市台科实业有限公司 | A kind of efficient single-screw extruder gearbox |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109253235A (en) * | 2018-11-29 | 2019-01-22 | 江阴齿轮箱制造有限公司 | Compact modular plastic extruder special gear box |
CN109340353A (en) * | 2018-12-04 | 2019-02-15 | 常州长浪齿轮箱有限公司 | Extruder gearbox |
CN109372976A (en) * | 2018-12-04 | 2019-02-22 | 常州长浪齿轮箱有限公司 | Easy-to-mount extruder gearbox |
CN111271434A (en) * | 2020-03-13 | 2020-06-12 | 上海研一重工机械有限公司 | Special gear box for cold cutting flying saw machine |
CN112013083A (en) * | 2020-09-27 | 2020-12-01 | 苏州苏文电器有限公司 | Anti-skid gear box |
CN115549378A (en) * | 2022-10-11 | 2022-12-30 | 南京高精齿轮集团有限公司 | Drive device and extruder |
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