CN109296736A - Engine PTO output interface structure - Google Patents

Engine PTO output interface structure Download PDF

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Publication number
CN109296736A
CN109296736A CN201811440185.2A CN201811440185A CN109296736A CN 109296736 A CN109296736 A CN 109296736A CN 201811440185 A CN201811440185 A CN 201811440185A CN 109296736 A CN109296736 A CN 109296736A
Authority
CN
China
Prior art keywords
gear chamber
ball bearing
bearing
gear
hydraulic pump
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
Application number
CN201811440185.2A
Other languages
Chinese (zh)
Inventor
阮志强
宣晓明
高龙健
李建武
贾建福
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FAW Jiefang Automotive Co Ltd
Original Assignee
FAW Jiefang Automotive Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FAW Jiefang Automotive Co Ltd filed Critical FAW Jiefang Automotive Co Ltd
Priority to CN201811440185.2A priority Critical patent/CN109296736A/en
Publication of CN109296736A publication Critical patent/CN109296736A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/023Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/021Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H57/022Adjustment of gear shafts or bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/021Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H57/022Adjustment of gear shafts or bearings
    • F16H2057/0221Axial adjustment

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)

Abstract

The invention belongs to engine design fields, it is related to a kind of engine PTO output interface structure, gear chamber cover including the connection of mutual pairing, gear chamber, deep groove ball bearing is installed in the bearing hole of the gear chamber cover, angular contact ball bearing is installed in the bearing hole of gear chamber, the hydraulic pump gear both ends diameter of axle is respectively supported in the inner hole of deep groove ball bearing and angular contact ball bearing, the tooth form of hydraulic pump gear is helical teeth, the angular contact ball bearing outer end is fixed by hydraulic pump terminal pad, deep groove ball bearing is fixed by front end positioning cover plate, bearing retaining spring is set between the front end positioning cover plate and deep groove ball bearing.Not only adjustment is convenient for the interface structure, moreover it is possible to greatly improve the tolerance grade requirement of PTO output interface.

Description

Engine PTO output interface structure
Technical field
The invention belongs to engine design fields, are related to a kind of engine PTO output interface structure.
Background technique
Since steadily comfortable characteristic, hydraulic-driven have obtained more and more extensive fortune in all kinds of machinery to hydraulic-driven With.Since the pressure of most machinery hydraulic systems is from hydraulic pump, the driving method of hydraulic pump is divided into engine again and directly drives Dynamic and vehicle belt pulley conveys two ways.More widely make in such a way that diesel engine directly drives in small tonnage fork car With, thus need to be designed on the diesel engine of mating small tonnage fork car one for driving hydraulic pump use PTO output interface (such as Fig. 1, And it must assure that the verticality of hydraulic pump installation end face and hydraulic pump driving shaft mounting hole, hydraulic pump installation seam allowance and hydraulic pump pass The concentricity of moving axis mounting hole.
Such diesel engine mostly uses Helical gear Transmission, and large axial force, therefore domestic conventional diesel engine will be generated in transmission PTO output interface structure (such as Fig. 3), both ends are all made of tapered roller bearing, and front end needs gap adjusting structure, i.e., between bearing Gap adjusting block and positioning screw position bearing, and eliminating axial gap ensures that bearing is felt relieved, but adjustment process is difficult, it is more difficult to meet Verticality and the concentricity requirement of PTO delivery outlet, while also periodic maintenance being needed to adjust, it, can substantially in vehicle insufficient space Increase customer care cost.The imports diesel engine PTO output interface structure such as Isuzu Motors (such as Fig. 9), both ends are all made of deep-groove ball axis It holds, although deep groove ball bearing self-centering does not have to adjustment axial gap, since deep groove ball bearing receiving axial force ability is lower, Single shaft strength is unable to satisfy balancing axial force request, therefore win cooperation need to be all made of by the cooperation of two bearing internal external circles To share balancing axial thrust.It is needed under the state using hot jacket assembly technology, assembly difficulty, assembly cost is larger.
Summary of the invention
The present invention is in view of the above-mentioned problems, provide a kind of engine PTO output interface structure, and not only adjustment is just for the interface structure It is prompt, moreover it is possible to greatly improve the tolerance grade requirement of PTO output interface.
Technical solution according to the invention: a kind of engine PTO output interface structure, it is characterised in that: including mutually right Gear chamber cover, the gear chamber for closing connection, install deep groove ball bearing in the bearing hole of the gear chamber cover, in the bearing hole of gear chamber Angular contact ball bearing is installed, the hydraulic pump gear both ends diameter of axle is respectively supported at the inner hole of deep groove ball bearing and angular contact ball bearing In, the tooth form of hydraulic pump gear is helical teeth, and the angular contact ball bearing outer end is fixed by hydraulic pump terminal pad, deep-groove ball Bearing is fixed by front end positioning cover plate, and bearing is arranged between the front end positioning cover plate and deep groove ball bearing and positions bullet Spring.
As a further improvement of the present invention, the bearing retaining spring includes tapered portion and is integrally connected to outside tapered portion Several elastic claws of port periphery, the tapered portion are fastenedly connected by tight fixed bolt and front end positioning cover plate, elastic claw It is pressed in the cycle surface of deep groove ball bearing.
As a further improvement of the present invention, the gear chamber cover and the faying face of gear chamber are equipped with gear chamber cover gasket, Positioning cover plate gasket in front end is set between front end positioning cover plate and gear chamber cover.
As a further improvement of the present invention, the gear chamber cover, gear chamber are connected by bolt-through.
As a further improvement of the present invention, the faying face of the hydraulic pump terminal pad and gear chamber setting hydraulic pump connects Plate mat piece.
As a further improvement of the present invention, the first bolt hole is set on the gear chamber cover, is arranged second in gear chamber Through hole is set on bolt hole, hydraulic pump terminal pad, and first bolt hole, the second bolt hole and through hole are connected by bolt It connects.
As a further improvement of the present invention, the first pillar, the outer end of gear chamber cover is arranged in the outer end face of the gear chamber The second pillar is arranged in face.
The technical effects of the invention are that: engine PTO output interface structure of the invention, due to single angular contact ball axis Balancing axial thrust can be met by holding, and avoid import machine using under two deep groove ball bearing states, the necessary hot jacket of bearing is installed Stringent assembly technology requirement.The gap adjustment that domestic conventional diesel engine PTO interface structure assembly and maintenance need is eliminated simultaneously Structure dexterously eliminates the axial gap of the course of work by spring, solves adjustment difficulty, and primary assembly in place, substantially mentions The verticality and concentricity of high PTO delivery outlet, while maintenance adjustment is not needed in use, due to safeguarding adjustment before avoiding Bring is not convenient.
Engine PTO output interface structure of the invention, also improves gear chamber and gear chamber cover partial structurtes, Hydraulic pump, which connects bolt and uses, runs through bolt hole, increases Combined machining technique and clamps lug, effectively increases PTO output interface Tolerance grade.
Detailed description of the invention
Fig. 1 is diesel engine PTO export structure hydraulic pump scheme of installation.
Fig. 2 is that diesel engine PTO export structure hydraulic pump is installed in place schematic diagram.
Fig. 3 is the schematic diagram of existing diesel PTO output interface structure.
Fig. 4 is structural schematic diagram of the invention.
Fig. 5 is the partial schematic diagram of gear chamber, gear chamber cover.
Fig. 6 is the end view of gear chamber.
Fig. 7 is the end view of gear chamber cover.
Fig. 8 is the structural schematic diagram of bearing retaining spring.
Fig. 9 is import Isuzu Motors diesel engine PTO output interface inside configuration structure and assembling schematic diagram.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing.
In Fig. 1 ~ 9, including front end positioning cover plate gasket 1, front end positioning cover plate 2, bearing clearance adjusting block 3, adjusting block are fixed Position screw 4, positioning screw locking nut 5, gear chamber cover 6, gear chamber cover gasket 7, hydraulic pump terminal pad gasket 8, hydraulic pump connect It is fixed to connect disk 9, tapered roller bearing 10, hydraulic pump gear 11, gear chamber 12, deep groove ball bearing 13, angular contact ball bearing 14, bearing Position spring 15, tapered portion 15-1, elastic claw 15-2, through hole 16, the second bolt hole 17, the first pillar 18, the second pillar 19, the One bolt hole 20 etc..
As shown in Fig. 4 ~ 8, the present invention is a kind of engine PTO output interface structure, the gear including the connection of mutual pairing Chamber cap 6, gear chamber 12 are installed deep groove ball bearing 13 in the bearing hole of the gear chamber cover 6, are installed in the bearing hole of gear chamber 12 Angular contact ball bearing 14, the 11 both ends diameter of axle of hydraulic pump gear are respectively supported at the interior of deep groove ball bearing 13 and angular contact ball bearing 14 Kong Zhong, the tooth form of hydraulic pump gear 11 are helical teeth, and 14 outer end of angular contact ball bearing is compressed solid by hydraulic pump terminal pad 9 Fixed, deep groove ball bearing 13 is fixed by front end positioning cover plate 2, between the front end positioning cover plate 2 and deep groove ball bearing 13 Bearing retaining spring 15 is set.
First bolt hole 20 is set on gear chamber cover 6, the second bolt hole 17, hydraulic pump terminal pad 9 are set in gear chamber 12 Upper setting through hole 16, first bolt hole 20, the second bolt hole 17 and through hole 16 are connected by bolt.This connection Mode increases coupling stiffness, while can guarantee that the installation of PTO output interface is consistent with processing stress, effectively reduces hydraulic When pump terminal pad bolt is urgent, the influence of gear chamber 12 and 6 stress deformation of gear chamber cover to tolerance.
In a particular application, gear chamber cover 6, gear chamber 12 bearing mounting hole be all made of the bearing hole of diameter 72, two holes Combined machining can be used and a knife completes the process, effectively reduce machining accuracy error caused by two knives are processed;Meanwhile to avoid group Hole periphery rigidity unevenly causes to will appear crooked phenomenon when processing when closing processing, in 6 structure of gear chamber 12 and gear chamber cover It increases Combined machining to clamp technique lug (the first pillar 18, the second pillar 19), increases processing rigidity, reduce machining deformation.
Bearing retaining spring 15 is including tapered portion 15-1 and is integrally connected to the several of tapered portion 15-1 external port periphery A elastic claw 15-2, tapered portion 15-1 are fastenedly connected by tight fixed bolt with front end positioning cover plate 2, phase on front end positioning cover plate 2 Answering joint face is arc surface, and in order to effectively be fitted and connected, elastic claw 15-2 is pressed in the cycle surface of deep groove ball bearing 13.Dress It is in material plasticity deformed area with elastic claw 15-2 deformation after the completion, the constant pretightning force provided under plasticity zone state is provided. In a particular application, a bearing retaining spring 15 generally four elastic claw 15-2 of setting.13 outer ring of deep groove ball bearing uses axis It holds retaining spring 15 to be positioned, can once assemble in place, effectively avoid existing structure using bearing clearance adjusting block 4, adjust Adjustment caused by block positioning screw is difficult.After the assembly is completed, bearing retaining spring 15 can provide the axial force of pre-add rear end, protect Demonstrate,prove angular contact ball bearing 14 can self-centering, simultaneously as the presence of axial each part's machining errors, positions without using bearing When spring 15, total gap is between 0.3-1.2mm, and common spring structure is positioned again without installation space using bearing Spring 15(65Mn material) when, since rigidity is very big, the predeformation of very little also has king-sized pretightning force, therefore, Wo Menxin The bearing retaining spring 15 of design is after reaching plastic zone, it may occur that plastic deformation, so that solution is inconsistent for pre-tightening gap, The problem that bring pretightning force is excessive and pretightning force is inconsistent, i.e. bearing retaining spring 15 can be reached by being plastically deformed Initial tension of spring is constant after assembly, to not influence deep groove ball bearing 13(model 6207), angular contact ball bearing 14(model For 7207B) service life.
Gear chamber cover 6 and the faying face of gear chamber 12 are equipped with gear chamber cover gasket 7, front end positioning cover plate 2 and gear chamber cover 6 Between be arranged front end positioning cover plate gasket 1.
Gear chamber cover 6, gear chamber 12 are connected by bolt-through.
Hydraulic pump terminal pad gasket 8 is arranged in the faying face of hydraulic pump terminal pad 9 and gear chamber 12.
The first pillar 18 is arranged in the outer end face of gear chamber 12, and the second pillar 19 is arranged in the outer end face of gear chamber cover 6.
Product of the present invention one end uses deep groove ball bearing 13, and the other end uses angular contact ball bearing 14, can active balance axis To power and radial force, and improve bearing bulk life time.By angular contact ball bearing 14 come balancing axial thrust, while by newly designing Bearing retaining spring 15 eliminate bearing axial clearance ensure bearing feel relieved.Bearing retaining spring 15 uses 65Mn spring steel Matter greatly reduces the deformation force of spring using four thin latch spring supported design, reduces additional increased axial force, eliminates Bring life problems are significantly increased due to axial force in deep groove ball bearing 13.
Hydraulic pump terminal pad 9 is positioned using angular contact ball bearing 14, the model 7207B of angular contact ball bearing 14, The multiple bearing between traditional structure such as Fig. 3 gear chamber 12 and hydraulic pump terminal pad 9 and tapered roller bearing 10 can be effectively reduced Caused accumulated error improves the tolerance grade of PTO output interface.

Claims (7)

1. a kind of engine PTO output interface structure, it is characterised in that: gear chamber cover (6), gear including the connection of mutual pairing Deep groove ball bearing (13) are installed in the bearing hole of the gear chamber cover (6) in room (12), established angle in the bearing hole of gear chamber (12) Contact ball bearing (14), hydraulic pump gear (11) both ends diameter of axle are respectively supported at deep groove ball bearing (13) and angular contact ball bearing (14) in inner hole, the tooth form of hydraulic pump gear (11) is helical teeth, and angular contact ball bearing (14) outer end is connected by hydraulic pump It connects disk (9) to be fixed, deep groove ball bearing (13) is fixed by front end positioning cover plate (2), the front end positioning cover plate (2) Bearing retaining spring (15) are set between deep groove ball bearing (13).
2. engine PTO output interface structure as described in claim 1, it is characterised in that: the bearing retaining spring (15) Including tapered portion (15-1) and several elastic claws (15-2) of tapered portion (15-1) external port periphery are integrally connected to, it is described Tapered portion (15-1) is fastenedly connected by tight fixed bolt with front end positioning cover plate (2), and elastic claw (15-2) is pressed in deep-groove ball axis Hold the cycle surface of (13).
3. engine PTO output interface structure as described in claim 1, it is characterised in that: the gear chamber cover (6) and gear The faying face of room (12) is equipped with gear chamber cover gasket (7), and it is fixed that front end is arranged between front end positioning cover plate (2) and gear chamber cover (6) Position cover board gasket (1).
4. engine PTO output interface structure as described in claim 1, it is characterised in that: the gear chamber cover (6), gear Room (12) is connected by bolt-through.
5. engine PTO output interface structure as described in claim 1, it is characterised in that: the hydraulic pump terminal pad (9) with Hydraulic pump terminal pad gasket (8) are arranged in the faying face of gear chamber (12).
6. engine PTO output interface structure as described in claim 1, it is characterised in that: be arranged on the gear chamber cover (6) Second bolt hole (17) is set on the first bolt hole (20), gear chamber (12), through hole is arranged on (9) in hydraulic pump terminal pad (16), first bolt hole (20), the second bolt hole (17) and through hole (16) are connected by bolt.
7. engine PTO output interface structure as described in claim 1, it is characterised in that: the outer end of the gear chamber (12) The first pillar (18) are arranged in face, and the second pillar (19) are arranged in the outer end face of gear chamber cover (6).
CN201811440185.2A 2018-11-29 2018-11-29 Engine PTO output interface structure Pending CN109296736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811440185.2A CN109296736A (en) 2018-11-29 2018-11-29 Engine PTO output interface structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811440185.2A CN109296736A (en) 2018-11-29 2018-11-29 Engine PTO output interface structure

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Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2405066Y (en) * 1999-12-14 2000-11-08 北京东方渴望科技发展有限公司 Braking set for non-slip-ring type electromagnetic clutch in electric intrruption condition
CN101773314A (en) * 2009-01-09 2010-07-14 葛振志 Shoes for heightening bounce height
CN201943815U (en) * 2011-01-14 2011-08-24 浙江新柴股份有限公司 Engine structure with pump
CN202007854U (en) * 2011-05-09 2011-10-12 重庆协成毕扬减振器有限公司 Valve-piece-only type piston valve for automobile shock absorber
CN202187824U (en) * 2011-07-21 2012-04-11 上海内燃机研究所 Supporting structure of engine hydraulic pump driving device
CN102416485A (en) * 2011-12-17 2012-04-18 苏州朗高电机有限公司 Combined processing tool for processing motor end cover and using method thereof
CN203362877U (en) * 2013-07-13 2013-12-25 临颍县颍机机械制造有限公司 Grass grasping machine of diaphragm spring clutch
CN203395149U (en) * 2013-07-12 2014-01-15 昆明云内动力股份有限公司 Device for eliminating axial force in running of helical gear shaft adopting belleville spring
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CN203783726U (en) * 2014-04-17 2014-08-20 一拖(洛阳)柴油机有限公司 Diesel engine hydraulic oil pump driving device
CN104002921A (en) * 2013-12-15 2014-08-27 广西科技大学 Power transmission device capable of reducing bicycle sliding resistance
CN203856571U (en) * 2014-05-21 2014-10-01 重庆润通动力有限公司 Auxiliary power output device of non-road diesel engine
CN203856534U (en) * 2014-05-21 2014-10-01 重庆润通动力有限公司 Lubricating structure of auxiliary power output device of non-road diesel engine
CN204900097U (en) * 2015-08-28 2015-12-23 安徽全柴动力股份有限公司 Take diesel engine timing gear room of hydraulic pump interface module
CN205013123U (en) * 2015-09-07 2016-02-03 浙江新柴股份有限公司 Reduce diesel engine PTO power take off's of error that beats interface structure
CN105385824A (en) * 2015-11-13 2016-03-09 哈尔滨东安发动机(集团)有限公司 Method for improving elasticity value yield of belleville spring
CN206592488U (en) * 2017-03-21 2017-10-27 山东临工工程机械有限公司 A kind of helical gear power takeoff assembly
CN207195046U (en) * 2017-09-01 2018-04-06 昆明云内动力股份有限公司 A kind of easy-to-dismount hydraulic pump gear chamber assembly
CN207701646U (en) * 2018-01-09 2018-08-07 成都航空职业技术学院 A kind of carbon fibre composite butterfly spring
CN209115646U (en) * 2018-11-29 2019-07-16 一汽解放汽车有限公司 Engine PTO output interface structure

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2405066Y (en) * 1999-12-14 2000-11-08 北京东方渴望科技发展有限公司 Braking set for non-slip-ring type electromagnetic clutch in electric intrruption condition
CN101773314A (en) * 2009-01-09 2010-07-14 葛振志 Shoes for heightening bounce height
CN201943815U (en) * 2011-01-14 2011-08-24 浙江新柴股份有限公司 Engine structure with pump
CN202007854U (en) * 2011-05-09 2011-10-12 重庆协成毕扬减振器有限公司 Valve-piece-only type piston valve for automobile shock absorber
CN202187824U (en) * 2011-07-21 2012-04-11 上海内燃机研究所 Supporting structure of engine hydraulic pump driving device
CN102416485A (en) * 2011-12-17 2012-04-18 苏州朗高电机有限公司 Combined processing tool for processing motor end cover and using method thereof
CN203395149U (en) * 2013-07-12 2014-01-15 昆明云内动力股份有限公司 Device for eliminating axial force in running of helical gear shaft adopting belleville spring
CN203362877U (en) * 2013-07-13 2013-12-25 临颍县颍机机械制造有限公司 Grass grasping machine of diaphragm spring clutch
CN104002921A (en) * 2013-12-15 2014-08-27 广西科技大学 Power transmission device capable of reducing bicycle sliding resistance
CN203783726U (en) * 2014-04-17 2014-08-20 一拖(洛阳)柴油机有限公司 Diesel engine hydraulic oil pump driving device
CN103925077A (en) * 2014-05-07 2014-07-16 广西玉柴机器股份有限公司 Auxiliary power output structure of diesel engine
CN203856571U (en) * 2014-05-21 2014-10-01 重庆润通动力有限公司 Auxiliary power output device of non-road diesel engine
CN203856534U (en) * 2014-05-21 2014-10-01 重庆润通动力有限公司 Lubricating structure of auxiliary power output device of non-road diesel engine
CN204900097U (en) * 2015-08-28 2015-12-23 安徽全柴动力股份有限公司 Take diesel engine timing gear room of hydraulic pump interface module
CN205013123U (en) * 2015-09-07 2016-02-03 浙江新柴股份有限公司 Reduce diesel engine PTO power take off's of error that beats interface structure
CN105385824A (en) * 2015-11-13 2016-03-09 哈尔滨东安发动机(集团)有限公司 Method for improving elasticity value yield of belleville spring
CN206592488U (en) * 2017-03-21 2017-10-27 山东临工工程机械有限公司 A kind of helical gear power takeoff assembly
CN207195046U (en) * 2017-09-01 2018-04-06 昆明云内动力股份有限公司 A kind of easy-to-dismount hydraulic pump gear chamber assembly
CN207701646U (en) * 2018-01-09 2018-08-07 成都航空职业技术学院 A kind of carbon fibre composite butterfly spring
CN209115646U (en) * 2018-11-29 2019-07-16 一汽解放汽车有限公司 Engine PTO output interface structure

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