CN106856697A - Tractor hangs quick hitch - Google Patents
Tractor hangs quick hitch Download PDFInfo
- Publication number
- CN106856697A CN106856697A CN201710016068.2A CN201710016068A CN106856697A CN 106856697 A CN106856697 A CN 106856697A CN 201710016068 A CN201710016068 A CN 201710016068A CN 106856697 A CN106856697 A CN 106856697A
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- China
- Prior art keywords
- sleeve
- spring
- tractor
- hook
- removable hook
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- 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.)
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/06—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors
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- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Agricultural Machines (AREA)
Abstract
The present invention relates to tractor suspension, a kind of tractor suspension quick hitch is refered in particular to, can be used to reduce the difficulty of suspension mounting, improve the mounting efficiency of trifilar suspension.Selected by the material to mechanical arm and the structure design of each mechanical part causes that tractor becomes safer with the connected mode of suspension, it is reliable.By electronic unit control, the motion of part, to reach the quick connection of suspension and agricultural machinery and implement.Using electronically controlled hydraulic system, labour intensity can be significantly reduced, improve operating efficiency.Larger power and torque can be obtained, so that tractor overall structure is more succinct, it is lightweight.Transmission operation is simple, is conducive to remote control and is automatically brought into operation.
Description
Technical field
The present invention relates to tractor suspension, a kind of tractor suspension quick hitch is refered in particular to, can be used to reduce suspension extension
The difficulty for connecing, improves the mounting efficiency of trifilar suspension.
Background technology
For response national policy greatly develops agricultural modernization, the premise of developing agricultural modernization is to realize that agricultural machinery is modern
Change.From the point of view of the development of current agricultural machinery, the development of most important part tractor in agricultural machinery development.With China's tractor industry
Development, agricultural machinery and implement are also constantly updating the replacement, then the connected mode between tractor and agricultural machinery and implement will also be updated.From most
It is exactly a simple elevating mechanism that tractor is connected when early with the mechanism of agricultural machinery and implement, and trifilar suspension machine was developed into later
, then there is hydraulic rockshaft in structure, develops into hydraulic lift system and half and hangs, electric-controlled hydraulic suspension till now.Drag
Machine drawing is constantly changing with the connected mode of agricultural machinery and implement.But it is constant to have a bit, that is, suspension be tractor with
General connection mode between agricultural machinery and implement.
The purpose of this innovation is so that dragging by the material selection to mechanical arm and the structure design of each mechanical part
Machine drawing becomes safer with the connected mode of suspension, reliable.By electronic unit control, the motion of part, to reach
The quick connection of suspension and agricultural machinery and implement.
Meaning is the performance that hitch had both been improved from new material, and tractor agricultural machinery and implement work in tow is improved again
When reliability.Using electronically controlled hydraulic system, labour intensity can be significantly reduced, improve operating efficiency.Can obtain larger
Power and torque it is lightweight so that tractor overall structure is more succinct.Transmission operation is simple, be conducive to remote control and
It is automatically brought into operation.Previous lifting rod member is more complicated in terms of mounting to be difficult to operate, and security is inadequate.This patent changes significantly
This kind of situation is become.
The content of the invention
The main object of the present invention is that design is a kind of has fast automatic mounting, machine automatization auto-lock function and simple structure
Compact, with low cost, dependable performance, high degree of automation, it is applied widely can self-locking hydraulically extensible type tractor it is quick
Hanging device.
In order to solve the above technical problems, one of the technical solution adopted by the present invention：
Self-coupling hitch include Removable hook, sideboard, Hook and telescoping rod, telescoping rod by backboard,
Sleeve, back-moving spring, cutting ferrule, detection means, positioning baffle, steel ball, pressure sensor, front apron and piston rod are constituted.
It is characterized by：There is one 45 degree of strip hole Hook front end, and second spring, second spring are placed with inside strip hole
Front end is connected with tooth bar, and Removable hook is meshed with tooth bar, Hook by connecting pin respectively with Removable hook, sideboard phase
Connection, Hook rear portion is equipped with the first spring in opening strip hole, and the first spring at front end is connected with sliding block；Hook and piston rod
It is connected, piston rod is positioned among sleeve, and two ends of sleeve are provided with front apron and backboard, are set between sleeve and piston rod
Have from lock set, be located between front apron and backboard from lock set, it is described to include being sheathed on piston rod outer surface from lock set
On cutting ferrule, the lock piece being fixed in sleeve interior surface, cutting ferrule rear end be tip portion, it is recessed that tip portion is provided with circular arc type
Groove, front end is contacted for thick end portion and with sleeve interior surface, and back-moving spring, lock piece bag are provided between cutting ferrule front end and backboard
Positioning baffle and steel ball are included, positioning baffle is located between cutting ferrule front end and front apron, be fixed on sleeve middle part, steel ball is embedded in positioning
Among baffle plate, steel ball one end be located at cutting ferrule tip portion circular arc type groove in, the other end be arranged on sleeve interior surface pressure
Force snesor contact, the detection means of piston reset is provided with the middle of the outer surface of sleeve, detection means by button, the 3rd spring and
Electromagnet is constituted, and electromagnet is located inside sleeve wall, and the 3rd spring is provided between electromagnet and button.
When piston rod is shunk up to positioning baffle is in contact with cutting ferrule anterior face to sleeve inner, telescoping rod is in tight
During lock status, received on pressure sensor from steel ball pressure reduce when, electromagnet power-off, button keep normality；When
When piston rod piece outside sleeve to moving, when telescoping rod is in unlocking condition, when being received on pressure sensor from steel ball
Pressure increase when, electromagnet be powered, button will be dented.
The strip hole is square opening or circular port.
The two of the technical solution adopted by the present invention：
Mounting manually includes：Removable hook body, the second sideboard, the second sliding block, the 4th spring, second sleeve, chain,
3rd axle, hand push button formula lock key.
It is characterized by：Second sliding block is provided with the second sideboard, and the 4th is provided between Removable hook body and the second sliding block
Spring, Removable hook body is connected with the 3rd axle front end chain, the tail end of the 3rd axle and Removable hook body in second sleeve,
Second sleeve front end is provided with hand push button formula lock key, hand push button formula lock key by the 5th spring, button, upper tooth post, sliding sleeve,
Lower tooth post composition；Upper tooth post top is provided with button, and upper tooth post lower end is connected with sliding sleeve, and sliding sleeve also with the upper end of lower tooth post
Split-phase is connected, and the 5th spring is provided between lower tooth post and the groove of second sleeve outer surface.
Compared with prior art, advantages of the present invention is that by quick hitch assembly, from lock set, can be automatically performed
Tractor-mounted is quickly mounted, locking between sleeve, piston rod etc. operation, and with it is simple and compact for structure, with low cost,
Dependable performance, high degree of automation, it is applied widely the advantages of.
Brief description of the drawings
Fig. 1 is scalable implement quick-attaching couple structure chart.
Fig. 2 is the tight lock status structure chart of telescoping rod.
Fig. 3 is telescoping rod unlocking condition structure chart.
Fig. 4 is the telescoping rod structural representation for having hydraulic drive source.
Fig. 5 is the schematic diagram of manual articulated device first.
Fig. 6 is the schematic diagram of manual articulated device second.
Fig. 7 is manual articulated device button schematic diagram.
Fig. 8 is lower tooth rod structure schematic diagram.
Fig. 9 is shift sleeve structure schematic diagram.
Figure 10 is upper tooth post structural representation.
Figure 11 is press-button structure schematic diagram.
In figure：1st, tooth bar, 2, Removable hook, 3, second spring, 4, sideboard, 5, connecting pin, 6, sliding block, the 7, first bullet
Spring, 8, Hook, 9, backboard, 10, sleeve, 11, back-moving spring, 12, cutting ferrule, 13, button, the 14, the 3rd spring, 15, electromagnetism
Iron, 16, positioning baffle, 17, steel ball, 18, pressure sensor, 19, front apron, 20, piston rod, 21, Removable hook body, 22,
Two sideboards, the 23, second sliding block, the 24, the 4th spring, 25, second sleeve, 26, chain, the 27, the 3rd axle, the 28, the 5th spring,
29th, button, 30, upper tooth post, 31, sliding sleeve, 32, lower tooth post.
Specific embodiment
Automatic coupling：
This patent is by tractor upper connecting rod and lower pull bar in the presence of the power of farm implements draw bar so that Hook 8 with
Removable hook 2 is in contact, and Removable hook 2 will be in the presence of tooth bar 1 and second spring 3 by turning-in, afterwards, Removable hook
2 reset, and at the same time, Hook 8 and sideboard 4 are in contact, under force, Hook 8, wall in the body of sideboard 4
A space is formd, sliding block 6 enters this space in the presence of the first spring 7 is compressed, to prevent the reversion of sideboard 4.It is living
Stopper rod 20 is provided with from lock set in sleeve 10 between sleeve 10 and piston rod 20, includes being sheathed on piston rod from lock set
Cutting ferrule 12, lock piece on outer surface.Lock piece is made up of pressure sensor 18, positioning baffle 16 and two steel balls 17, cutting ferrule
12 rear ends are provided with circular arc type groove for tip portion, and front end is thick end portion, and back-moving spring is provided between cutting ferrule 12 and backboard 9
11, positioning baffle 16 is located between cutting ferrule 12 and front apron 19, is fixed on sleeve middle part, and steel ball 17 is embedded among positioning baffle.
When piston rod 20 is contracted to telescoping rod is in tight lock status, positioning baffle 16 is in contact with the anterior face of cutting ferrule 12, works as pressure
Received on force snesor 18 from steel ball 17 pressure reduce when, electromagnet 15 is powered off, button 13 keep normality；Work as piston
When bar 20 is stretched, when telescoping rod is in unlocking condition, when what is received on pressure sensor 18 increases from the pressure on steel ball 17
When big, electromagnet 15 is powered, and button 13 will be dented.
The above is only the preferred embodiment of the present invention, the hair being designed with beneficial to following agricultural machinery suspension of this patent
Exhibition, the operation difficulty for effectively reducing on-hook is good, improves the mounting efficiency of trifilar suspension.
I without driving source：
When without driving source, during coupling hook, first need to make telescoping rod be in unlocking condition, pressure sensor 18 manually
On the pressure that is subject to increase, electromagnet 15 is powered, and button 13 can be dented, then by tractor hang quick hitch with
Farm implements draw bar links together, and further the contraposition between the suspension of guiding tractor and farm implements, further makes piston rod 20 receive
Contracting so that telescoping rod is in tight lock status, the pressure being subject on pressure sensor 18 reduces, and electromagnet 15 is powered off, the 3rd
In the presence of spring 14, button 13 will be returned to normality, be finally reached the purpose of quick mounting positioning, reduce mounting difficulty,
Substantially increase efficiency.
II has driving source：
When there is hydraulic drive source, when tractor is near farm implements drawbar member, made by hydraulic drive source driving rod member
Piston rod 20 extends, and further telescoping rod is in unlocking condition, and the pressure being subject on pressure sensor 18 increases, electromagnet 15
It is powered, button 13 can be dented.Further tractor suspension quick hitch and farm implements are aligned, it is further outstanding with tractor
Hang the purpose that quick hitch realizes automatic mounting farm implements.Further again by the common of hydraulic drive source and back-moving spring
Under effect, piston rod 20 is made to shrink so that telescoping rod is in tight lock status, the pressure being subject on pressure sensor 18 reduces,
Electromagnet 15 is powered off, and in the presence of the 3rd spring 14, button 13 will be returned to normality, has been finally reached the mesh of quick mounting positioning
, mounting difficulty is reduced, substantially increase efficiency and reach full automatic effect, the difficulty of mounting is greatly reduced, improve
Operating efficiency.
Link up with by hand：
Can manually be mounted with unrestricted choice, tractor suspension quick hitch stroke is 25cm, when Removable hook body 21
Bottom apart from the port of second sleeve 25 also remain 3cm when, chain 26 is straightened.Do not stressed from chain 26 and be applied to chain 26 and drawn
Directly, its stroke is 25cm.The front end of second sleeve 26 is provided with hand push button formula lock key, lock key by the 5th spring 28, button 29,
Upper tooth post 30, sliding sleeve 31, lower tooth post 32 are constituted.The top of upper tooth post 30 is provided with button 29, and the lower end of upper tooth post 30 is connected with sliding sleeve 31,
And upper part of the sliding sleeve 31 also with lower tooth post 37 is connected, and is set between the groove of lower tooth post 37 and the outer surface of second sleeve 26
There is the 5th spring 28.Totally three groups of ladder draw-in groove is provided with sliding sleeve 31, three is one group, and middle draw-in groove is low, and both sides draw-in groove is higher simultaneously
And higher two draw-in groove bases are oblique.The lower taper end of tooth post 32 will insert the circular port at the middle part of Removable hook body 21 first by one
Lower button 29, makes lower tooth post 32 in the presence of the 5th spring 28, and the bar shaped projecting block on the lower surface of tooth post 32 is stuck in two checkposts
On groove bayonet socket higher so realize unblock, the 3rd axle 27 stretch cause Removable hook 21 be in transitory state, due to chain
26 presence, the extension that Removable hook body 21 can be manual, by the second sliding block 3 toward pusher, then by the second sideboard 22 up
Side is removed, the smooth mounting of Removable hook 21 and draw bar, then the second sideboard 22 is put down, in the effect of the 4th spring 24
Under, the second sliding block 3 is resetted simultaneously so that the second sideboard 22 is blocked with the notch on Removable hook 21.Then tractor is past
After fall, in the presence of dilatory machine power, when Removable hook 21 is returned near initial position, then press button 29 and cause lower tooth post 32
Locking is realized in the ladder draw-in groove that three, the surface striped blocks of projection are slipped on sliding sleeve 31 respectively, is in the body of Removable hook 21 solid
Determine state.
Beneficial effects of the present invention：
1st, this patent automaticity is quite high, is conducive to the development of following agricultural machinery suspension, reduces the difficulty of mounting, significantly
3 points of mounting efficiency of lifting.
2nd, having multiple type of drive can select, and or else can select different type of drive under the conditions of, reached and carried
The purpose of high workload efficiency.
3rd, this patent, from lock set, can be automatically performed tractor-mounted and quickly mounted by quick hitch assembly, be covered
The operations such as cylinder, locking between piston rod, and with simple and compact for structure, with low cost, dependable performance, high degree of automation,
Applied widely the advantages of.
4th, this patent provides manually and automatically two kinds of selection schemes, or else can select different modes under the conditions of,
Improve mounting efficiency.
5th, if piston rod has returned to original position in this patent, the button on sleeve has corresponding reaction, is conducive to
In actual mechanical process, preferably determine whether piston rod playbacks, there is security very high.
Claims (6)
1. tractor hangs quick hitch, it is characterised in that：Described device includes Removable hook, sideboard, Hook
And telescoping rod, telescoping rod is by backboard, sleeve, back-moving spring, cutting ferrule, detection means, positioning baffle, steel ball, pressure biography
Sensor, front apron and piston rod are constituted；There is one 45 degree of strip hole Hook front end, and strip is placed with second spring inside hole,
Second spring front end is connected with tooth bar, and Removable hook is meshed with tooth bar, Hook by connecting pin respectively with Removable hook, work
Dynamic baffle plate is connected, and Hook rear portion is equipped with the first spring in opening strip hole, and the first spring at front end is connected with sliding block；Hook
It is connected with piston rod, piston rod is positioned among sleeve, two ends of sleeve are provided with front apron and backboard, sleeve and piston
It is provided between bar from lock set, is located between front apron and backboard from lock set, it is described to include being sheathed on piston from lock set
Cutting ferrule, the lock piece being fixed in sleeve interior surface on rod outer surface, cutting ferrule rear end are tip portion, and tip portion is provided with circle
Arc groove, front end is contacted for thick end portion and with sleeve interior surface, and back-moving spring is provided between cutting ferrule front end and backboard, is locked
Stop member includes positioning baffle and steel ball, and positioning baffle is located between cutting ferrule front end and front apron, is fixed on sleeve middle part, and steel ball is embedding
Among positioning baffle, steel ball one end be located at cutting ferrule tip portion circular arc type groove in, the other end be arranged on sleeve in table
The pressure sensor contacts in face, are provided with the detection means of piston reset in the middle of the outer surface of sleeve, detection means by button, the 3rd
Spring and electromagnet are constituted, and electromagnet is located inside sleeve wall, and the 3rd spring is provided between electromagnet and button.
2. tractor as claimed in claim 1 hangs quick hitch, it is characterised in that：By tractor upper connecting rod with
Pull bar is in the presence of the power of farm implements draw bar so that Hook is in contact with Removable hook, and Removable hook will be in tooth bar and
By turning-in in the presence of two springs, afterwards, Removable hook resets, and at the same time, Hook and sideboard are in contact,
In the presence of power, Hook, wall forms a space in sideboard body, and sliding block enters this in the presence of the first spring is compressed
Space, to prevent the reversion of sideboard；When piston rod shrinks until positioning baffle and cutting ferrule anterior face phase to sleeve inner
Contact, telescoping rod be in tight lock status when, received on pressure sensor from steel ball pressure reduce when, electromagnet break
Electricity, button keeps normality；When piston rod piece outside sleeve to moving, when telescoping rod is in unlocking condition, work as pressure sensor
On receive from steel ball pressure increase when, electromagnet be powered, button will be dented.
3. tractor as claimed in claim 1 hangs quick hitch, it is characterised in that：The strip hole be square opening or
Person's circular port.
4. tractor hangs quick hitch, it is characterised in that：Described device include Removable hook body, the second sideboard,
Second sliding block, the 4th spring, second sleeve, chain, the 3rd axle, hand push button formula lock key；Second sliding block is provided with the second work
Dynamic baffle plate, is provided with the 4th spring between Removable hook body and the second sliding block, Removable hook body is connected with the 3rd axle front end with chain
Connect, in second sleeve, second sleeve front end is provided with hand push button formula lock key to the tail end of the 3rd axle and Removable hook body, manually
Buttoned locking key is by the 5th spring, button, upper tooth post, sliding sleeve, lower tooth post composition；Upper tooth post top is provided with button, upper tooth post
Lower end is connected with sliding sleeve, and upper part of the sliding sleeve also with lower tooth post is connected, and lower tooth post is recessed with second sleeve outer surface
The 5th spring is provided between groove.
5. tractor as claimed in claim 4 hangs quick hitch, it is characterised in that：Ladder draw-in groove is provided with sliding sleeve to be total to
Three groups, three is one group, and middle draw-in groove is low, and draw-in groove two draw-in groove bases higher and higher in both sides are oblique.
6. tractor as claimed in claim 4 hangs quick hitch, it is characterised in that：The quick mounting dress of tractor suspension
Stroke is put for 25cm, when the bottom of Removable hook body also remains 3cm apart from second sleeve port, chain is straightened；From chain not
Stress is applied to chain and is straightened, and its stroke is 25cm；The circular port that lower tooth post taper end will be inserted in the middle part of Removable hook body is first pressed
Once button, makes lower tooth post in the presence of the 5th spring, and it is higher that the bar shaped projecting block on lower tooth post surface is stuck in both sides draw-in groove
Bayonet socket on so that realize unblock, the 3rd axle is stretched and causes that Removable hook is in transitory state, due to the presence of chain, activity
Hook can be manual extension, by the second sliding block toward pusher, then by the second sideboard toward top remove, Removable hook with lead
Draw the smooth mounting of bar, then the second sideboard put down, in the presence of the 4th spring, the second sliding block resets simultaneously so that
Second sideboard is blocked with the notch on Removable hook, and then tractor falls backward, in the presence of dilatory machine power, works as activity
Hook is returned near initial position, then presses button so that the striped blocks of lower three projections in tooth post surface are slipped on sliding sleeve respectively
Locking is realized in ladder draw-in groove, Removable hook body is in stationary state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016068.2A CN106856697A (en) | 2017-01-10 | 2017-01-10 | Tractor hangs quick hitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016068.2A CN106856697A (en) | 2017-01-10 | 2017-01-10 | Tractor hangs quick hitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106856697A true CN106856697A (en) | 2017-06-20 |
Family
ID=59165486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710016068.2A Pending CN106856697A (en) | 2017-01-10 | 2017-01-10 | Tractor hangs quick hitch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106856697A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108897129A (en) * | 2018-08-02 | 2018-11-27 | 格林菲尔智能科技江苏有限公司 | Explosion-proof automobile-used lookout system structure |
| CN109368022A (en) * | 2018-10-31 | 2019-02-22 | 格力电器（杭州）有限公司 | A kind of locking device and binding band |
| CN109379915A (en) * | 2018-11-20 | 2019-02-26 | 曹丽美 | A kind of intelligence clutch towing device |
| CN110339501A (en) * | 2019-06-28 | 2019-10-18 | 江苏瑞沃建设集团有限公司 | Carry-on hook a kind of easy to carry and stable structure |
| CN110501101A (en) * | 2019-09-02 | 2019-11-26 | 吉林大学 | A kind of self-coupling hitch for the measurement of tractor hydraulic lifting force |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85200858U (en) * | 1985-04-18 | 1986-06-25 | 北京农业机械化学院 | Pull-in-and-out spherical hinge for tractor hanging equipment |
| US4805927A (en) * | 1987-11-20 | 1989-02-21 | Deere & Company | Hitch adapter for use in connecting semi-integral, PTO-driven implements to tractor three-point hitch |
| US20080142231A1 (en) * | 2006-12-14 | 2008-06-19 | Priepke Edward H | Automatic latch for three point hitch quick coupler and pto connection module |
| CN202019531U (en) * | 2011-02-28 | 2011-11-02 | 中国一拖集团有限公司 | Fast hanging connection device for tractor |
-
2017
- 2017-01-10 CN CN201710016068.2A patent/CN106856697A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85200858U (en) * | 1985-04-18 | 1986-06-25 | 北京农业机械化学院 | Pull-in-and-out spherical hinge for tractor hanging equipment |
| US4805927A (en) * | 1987-11-20 | 1989-02-21 | Deere & Company | Hitch adapter for use in connecting semi-integral, PTO-driven implements to tractor three-point hitch |
| US20080142231A1 (en) * | 2006-12-14 | 2008-06-19 | Priepke Edward H | Automatic latch for three point hitch quick coupler and pto connection module |
| CN202019531U (en) * | 2011-02-28 | 2011-11-02 | 中国一拖集团有限公司 | Fast hanging connection device for tractor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108897129A (en) * | 2018-08-02 | 2018-11-27 | 格林菲尔智能科技江苏有限公司 | Explosion-proof automobile-used lookout system structure |
| CN109368022A (en) * | 2018-10-31 | 2019-02-22 | 格力电器（杭州）有限公司 | A kind of locking device and binding band |
| CN109379915A (en) * | 2018-11-20 | 2019-02-26 | 曹丽美 | A kind of intelligence clutch towing device |
| CN109379915B (en) * | 2018-11-20 | 2021-08-17 | 合肥智慧龙机械设计有限公司 | Intelligent clutch dragging device |
| CN110339501A (en) * | 2019-06-28 | 2019-10-18 | 江苏瑞沃建设集团有限公司 | Carry-on hook a kind of easy to carry and stable structure |
| CN110501101A (en) * | 2019-09-02 | 2019-11-26 | 吉林大学 | A kind of self-coupling hitch for the measurement of tractor hydraulic lifting force |
| CN110501101B (en) * | 2019-09-02 | 2024-02-20 | 吉林大学 | Automatic hooking device for measuring hydraulic lifting force of tractor |
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Application publication date: 20170620 |