CN104986697A - Fork positioner capable of achieving synchronous pitch adjustment function - Google Patents
Fork positioner capable of achieving synchronous pitch adjustment function Download PDFInfo
- Publication number
- CN104986697A CN104986697A CN201510396177.2A CN201510396177A CN104986697A CN 104986697 A CN104986697 A CN 104986697A CN 201510396177 A CN201510396177 A CN 201510396177A CN 104986697 A CN104986697 A CN 104986697A
- Authority
- CN
- China
- Prior art keywords
- fork
- roll adjustment
- oil cylinder
- pallet fork
- bracket
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
- B66F9/14—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements
- B66F9/142—Movements of forks either individually or relative to each other
- B66F9/144—Movements of forks relative to each other - independent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention provides a fork positioner capable of achieving a synchronous pitch adjustment function. The fork positioner comprises a fork frame body, a left fork and a right fork, wherein the right fork is in rolling connection with the fork frame body through a right bracket, and the left fork is in rolling connection with the fork frame body through a left bracket; two pitch controllable oil cylinders are fixedly arranged at the two side ends of the fork frame body respectively; the piston end of the right pitch controllable oil cylinder is connected with the left bracket; the piston end of the left pitch controllable oil cylinder is connected with the right bracket; the piston end of the right pitch controllable oil cylinder and the piston end of the left pitch controllable oil cylinder are connected in series through an oil pipe and then are connected with one end of a four-piece valve; the other end of the four-piece valve is connected with the other end of the right pitch controllable oil cylinder and the other end of the left pitch controllable oil cylinder through a flow distributing and collecting valve; two outlets of the flow distributing and collecting valve are connected with the two ends of a three-piece valve respectively. A three-piece valve oil path is connected with the two oil cylinders in series in the lateral movement process, the four-piece valve is connected with the two oil cylinders in parallel when the pitch is adjusted, synchronous pitch adjustment of the forks is ensured, and friction is reduced, so that the fork movement resistance is small, operation is flexible and synchronism of the two forks is ensured.
Description
Technical field
The present invention relates to a kind of fork truck, be specifically related to a kind of distance-adjusting fork of synchronous roll adjustment.
Background technology
The distance-adjusting fork of fork truck is applicable to the portage work of the various occasions of the random goods yards such as machinery, harbour, pottery, building materials, agricultural and no standard pallet, it is by the spacing between hydraulic pressure adjustment pallet fork, realize the goods of carrying different size pallet, need not manually adjust pallet fork spacing by operating personal, alleviate the labour intensity of operating personal, increase work efficiency, reduce the breakage of pallet and goods.
Existing distance-adjusting fork realizes sideward sliding function needs an oil cylinder and one group of oil circuit, and realizing roll adjustment function then needs another group oil circuit and two oil cylinders to carry out synchronous roll adjustment.Still have problems: 1. when carrying out roll adjustment function, two pallet forks can not be synchronous, this is because the pallet fork axis of guide is different to two pallet fork friction drags, causes pallet fork moving displacement to have difference; In addition, the cliding friction of the pallet fork axis of guide and pallet fork, easily the damage axis of guide and pallet fork; 2. when realizing sideward sliding function, after-frame sleeve and side arm macro-axis are cliding frictions, and the sidesway oil cylinder needing cylinder diameter larger is to overcome its friction force, and when particularly band carries sidesway, side arm macro-axis produces serious wear; 3. whole mechanism more complicated, point side arm, after-frame, pallet fork, cause keeping in repair, adjust, dismantle cumbersome; 4. existing distance-adjusting fork is only applied on 5-10t fork truck, inapplicable on the fork truck of other models.
Summary of the invention
The present invention, in order to solve the problems of the technologies described above, provides a kind of distance-adjusting fork of synchronous roll adjustment, solves the wear problem of the pallet fork axis of guide and pallet fork and after-frame sleeve and side arm macro-axis, ensures that two pallet forks realize synchronous roll adjustment.
Technical scheme of the present invention is:
A distance-adjusting fork for synchronous roll adjustment, comprises pallet fork support body and right fork and left pallet fork, and described right fork is rolled with pallet fork support body by right bracket and is connected, and left pallet fork to be rolled with pallet fork support body by left tray and is connected; The two side ends of described pallet fork support body respectively sets firmly a roll adjustment oil cylinder, and wherein the piston end of right roll adjustment oil cylinder is connected with left tray, and the piston end of left roll adjustment oil cylinder is connected with right bracket; The piston end of described right roll adjustment oil cylinder, left roll adjustment oil cylinder is by being connected with four plate valve one end after oil pipe series winding, and the other end of described four plate valves is connected with the other end of right roll adjustment oil cylinder, left roll adjustment oil cylinder respectively by flow divider-combiner; Two outlets of described flow divider-combiner are connected with the two ends of three plate valves respectively.
Further, described pallet fork support body comprises the frame-shaped construction be linked to be by entablatrance, cross sill and two side plates, and the back side of described frame-shaped construction to be provided with for fixing with the column be connected, and being also provided with brace panel between the upper end of described column and entablatrance, to carry out strengthening fixing; By link of boards between described entablatrance, cross sill, the front end of described entablatrance is installed with carries out for right bracket, left tray the guide rail that rolls.
Further, described right bracket, left tray include bracket body, and described bracket body upper end is provided with main roller, lower end is provided with side wheel.
Further, the main shaft of described main roller is fixedly arranged on the biside plate of the L shape bracing frame being positioned at bracket body upper end.
In the present invention, left roll adjustment oil cylinder, right roll adjustment oil cylinder are double-acting type hydraulic actuating cylinder, the motion of both direction is all that depended on pressure oil realizes, when Barrel of Hydraulic Cylinders does not have one end oil-feed of piston rod, i.e. and rodless cavity oil-feed, have one end oil return of piston rod, piston rod can stretch out in cylinder barrel; When there being the oil-feed of piston rod one end, i.e. rod chamber oil-feed, the oil return of piston-rodless one end, piston rod can be retracted in cylinder barrel.
Distance-adjusting fork of the present invention can realize synchronous roll adjustment, sidesway and differential side-shifting distance-regulating function, specific as follows:
Synchronous roll adjustment: left pallet fork and the meta of right fork on pallet fork support body, make piston rod stretch out by the diverter function of flow divider-combiner, drives two pallet forks to move outside two, realizes pallet fork and open roll adjustment function.Then another port oil-feed of four plate valves, promotes piston rod contraction and pulls right bracket, left tray to drive right fork and left pallet fork to move to centre simultaneously, and pass through the afflux function of flow divider-combiner, achieve two pallet forks and close up roll adjustment function.Wherein 1:1 bypass flow selected by flow divider-combiner, when a pallet fork receive resistance larger time, its oil cylinder working-pressure becomes large, and speed diminishes, and flow diminishes; Flow divider valve regulates restriction automatically, ensures that receiving this larger Flow of Cylinder of resistance becomes large, reaches left and right cylinder flow 1:1 balance again, realize synchronizing function.
Sidesway: one end of three plate valves is communicated with the rodless cavity of right roll adjustment oil cylinder, the other end is communicated with the rodless cavity of left roll adjustment oil cylinder, connect between the rod chamber of left and right roll adjustment oil cylinder and communicate, when three plate valves wherein one end oil-feed time, hydraulic oil promotes right bracket simultaneously, left tray drives right fork and left pallet fork to move to the right or to the left.
Differential side-shifting distance-regulating: when two pallet fork positions are in the centre of pallet fork support body or two ends, is in end position, by mechanical position limitation owing to wherein there being a pallet fork, sideward sliding function is serial connection oil circuit, have a pallet fork limited, another pallet fork also can be limited, cannot realize sideward sliding function.Now can only be undertaken stretching by roll adjustment function, contracting pallet fork, make flexible after pallet fork and its distance difference between extreme positions, could realize sideward sliding function like this, this step is called differential side-shifting distance-regulating.
So integral structure of the present invention is simple, intensity improves, easy to assembly; Its entire length is adjustable, and the amount of side-shift of two pallet forks is adjustable, and roll adjustment scope is adjustable; Simplify the integral structure of side-shifting distance-regulating fork, reduce costs, improve the market competitiveness.
In the present invention, pallet fork support body is the integrated design, and cancels side arm macro-axis, reduces friction; Also cancel sidesway oil cylinder in addition, instead of three original oil cylinders with left and right roll adjustment oil cylinder; Adopt differential oil line connection mode, three plate valve oil circuit serial connections two oil cylinder during sidesway, four plate valves during roll adjustment also connect two oil cylinder, decide the size of amount of side-shift according to the position of roll adjustment; In addition, increase flow divider-combiner, ensure the synchronous roll adjustment of pallet fork.
The present invention increases left and right bracket, is mounted on by pallet fork on bracket, and bracket top is provided with two pairs of L-shaped main rollers and blocks on the guide rail on pallet fork support body, rolls along guide rail top end face and medial surface; Rolled along the cross sill on pallet fork support body by the side wheel of its bottom again.Namely the motion friction of rolling of left and right bracket on pallet fork support body replaces cliding friction, reduces friction, makes pallet fork resistance of motion little, go slick, and net synchronization capability between two pallet forks is good; And it is not fragile to protect distance-adjusting fork.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Fig. 1 is structural perspective of the present invention.
Fig. 2 is the structural representation of pallet fork support body in the present invention.
Fig. 3 is the structural representation of middle left and right bracket of the present invention.
Fig. 4 is hydraulic tubing figure of the present invention.
Fig. 5 is the front view of pallet fork of the present invention when being positioned at meta.
Fig. 6 is that pallet fork roll adjustment of the present invention is to front view during greatest limit.
Fig. 7 is front view when moving on to end position on the right side of pallet fork of the present invention.
Fig. 8 is front view when moving on to end position on the left of pallet fork of the present invention.
In figure: 1-pallet fork support body, 1-1 column, 1-2 brace panel, 1-3 entablatrance, 1-4 side plate, 1-5 cross sill, 1-6 gusset, 1-7 guide rail; The right bracket of 2-1,2-2 left tray, 2-3 main roller, 2-4 bracket body, 2-5 side wheel; The right roll adjustment oil cylinder of 3-1, the left roll adjustment oil cylinder of 3-2; 4-1 right fork, the left pallet fork of 4-2; 5-flow divider-combiner, 6-tetra-plate valve, 7-tri-plate valve.
Detailed description of the invention
As shown in Figure 1, a kind of distance-adjusting fork of synchronous roll adjustment, is comprised pallet fork support body 1 and right fork 4-1 and left pallet fork 4-2, described right fork 4-1 and is rolled with pallet fork support body 1 by right bracket 2-1 and be connected, and left pallet fork 4-2 passes through left tray 2-2 and rolls with pallet fork support body 1 and be connected; The two side ends of described pallet fork support body 1 respectively sets firmly a roll adjustment oil cylinder, and wherein the piston end of right roll adjustment oil cylinder 3-1 is connected with left tray 2-2, and the piston end of left roll adjustment oil cylinder 3-2 is connected with right bracket 2-1; As shown in Figure 4, the piston end of described right roll adjustment oil cylinder 3-1, left roll adjustment oil cylinder 3-2 is by being connected with four plate valve 6 one end after oil pipe series winding, and the other end of described four plate valves 6 is connected with the other end of right roll adjustment oil cylinder 3-1, left roll adjustment oil cylinder 3-2 respectively by flow divider-combiner 5; Two outlets of described flow divider-combiner 5 are connected with the two ends of three plate valves 7 respectively.
As shown in Figure 2, pallet fork support body comprises by entablatrance 1-3, cross sill 1-5 and two frame-shaped construction that side plate 1-4 is linked to be, the back side of described frame-shaped construction to be provided with for fixing with the column 1-1 be connected, and being also provided with brace panel 1-3 between the upper end of described column 1-1 and entablatrance 1-3, to carry out strengthening fixing; Connected by gusset 1-6 between described entablatrance 1-3, cross sill 1-5, the front end of described entablatrance 1-3 is installed with carries out for right bracket 2-1, left tray 2-2 the guide rail 1-7 that rolls.
As shown in Figure 3, the structure of right bracket 2-1, left tray 2-2 is identical, includes bracket body 2-4, and described bracket body 2-4 upper end is provided with main roller 2-3, lower end is provided with side wheel 2-5.
Further, the main shaft of described main roller 2-3 is fixedly arranged on the biside plate of the L shape bracing frame being positioned at bracket body 2-4 upper end.Namely right bracket 2-1, left tray 2-2 are all that two couples of main roller 2-3 of the L-shaped laying arranged by its top are blocked on the guide rail 1-7 on pallet fork support body 1, and roll along guide rail 1-7 top end face and medial surface; Rolled along the cross sill 1-5 on pallet fork support body 1 by its side wheel 2-5 more simultaneously.Right fork 4-1 and left pallet fork 4-2 is separately fixed at right bracket 2-1, left tray 2-2, right bracket 2-1, left tray 2-2 are connected with the piston end of right roll adjustment oil cylinder 3-1, left roll adjustment oil cylinder 3-2 respectively, the stretching operation of oil cylinder makes two pallet forks linked together with right bracket 2-1, left tray 2-2 carry out sidesway, realizes the sidesway between two pallet forks and roll adjustment action.
The roll adjustment principle of work and power: starting position is as Fig. 5, left pallet fork 4-2 and the meta of right fork 4-1 on pallet fork support body 1, when E mouth to flow divider-combiner 5 of the B mouth oil-feed of four plate valves 6 (now three plate valves 7 cut out), flow divider-combiner 6 starts diverter function, and be divided into the rodless cavity that two parts are defeated by left roll adjustment oil cylinder 3-2, right roll adjustment oil cylinder 3-1, from its other end oil return to the A mouth of four plate valves 6 from its F mouth and G mouth; Then hydraulic oil promotion piston rod stretches out and withstands right bracket 2-1, left tray 2-2 and drive right fork 4-1 and left pallet fork 4-2 to move outside two simultaneously, achieves two pallet forks and opens roll adjustment function.
Otherwise, the A mouth oil-feed of four plate valves 6, the oil return of B mouth, then flow divider-combiner 5 is afflux function, and hydraulic oil makes piston rod shrink, and pulls two pallet forks to move to centre, and realizing pallet fork closes up roll adjustment function, roll adjustment to during greatest limit as shown in Figure 6.
Sideward sliding function principle: when by right fork 4-1 and left pallet fork 4-2 roll adjustment to a determining deviation time, close four plate valves 6, open three plate valves 7, the C mouth of three plate valves 7 is communicated with the rodless cavity of right roll adjustment oil cylinder 3-1, the D mouth of three plate valves 7 is communicated with the rodless cavity of left roll adjustment oil cylinder 3-2, when its C mouth oil-feed, then hydraulic oil enters the rodless cavity of left roll adjustment oil cylinder 3-2, the piston rod promoting left roll adjustment oil cylinder 3-2 stretches out, hydraulic oil enters the rod chamber of right roll adjustment oil cylinder 3-1 again through the rod chamber of left roll adjustment oil cylinder 3-2, the piston rod of left roll adjustment oil cylinder 3-2 shrinks, promote right bracket 2-1 simultaneously, left tray 2-2 drives right fork 4-1 and left pallet fork 4-2 to move to the right, hydraulic oil through the rodless cavity oil return of left roll adjustment oil cylinder 3-2 to the D mouth of three plate valves 7, as shown in Figure 7.If the D mouth oil-feed of three plate valves 7, the oil return of C mouth, then achieve right fork 4-1 and left pallet fork 4-2 sidesway left simultaneously, as shown in Figure 8.
Differential side-shifting distance-regulating: cannot realize sideward sliding function again when two pallet fork positions are at Fig. 5 and Fig. 6, is in end position, by mechanical position limitation owing to wherein there being a pallet fork, sideward sliding function is serial connection oil circuit, have a pallet fork limited, another pallet fork also can be limited, cannot realize sideward sliding function.Now can only be undertaken stretching by roll adjustment function, contracting pallet fork, make flexible after pallet fork and its distance difference between extreme positions, could realize sideward sliding function like this, this step is called differential side-shifting distance-regulating.
Above embodiment is not limited only to protection scope of the present invention, all modify based on basic thought of the present invention or change all belong to protection scope of the present invention.
Claims (4)
1. the distance-adjusting fork of a synchronous roll adjustment, comprise pallet fork support body (1) and right fork (4-1) and left pallet fork (4-2), it is characterized in that: described right fork (4-1) to be rolled with pallet fork support body (1) by right bracket (2-1) and is connected, left pallet fork (4-2) to be rolled with pallet fork support body (1) by left tray (2-2) and is connected; The two side ends of described pallet fork support body (1) respectively sets firmly a roll adjustment oil cylinder, and wherein the piston end of right roll adjustment oil cylinder (3-1) is connected with left tray (2-2), and the piston end of left roll adjustment oil cylinder (3-2) is connected with right bracket (2-1); The piston end of described right roll adjustment oil cylinder (3-1), left roll adjustment oil cylinder (3-2) is by being connected with four plate valves (6) one end after oil pipe series winding, and the other end of described four plate valves (6) is connected with the other end of right roll adjustment oil cylinder (3-1), left roll adjustment oil cylinder (3-2) respectively by flow divider-combiner (5); Two outlets of described flow divider-combiner (5) are connected with the two ends of three plate valves (7) respectively.
2. the distance-adjusting fork of a kind of synchronous roll adjustment according to claim 1, it is characterized in that: described pallet fork support body (1) comprises the frame-shaped construction be linked to be by entablatrance (1-3), cross sill (1-5) and two side plates (1-4), the back side of described frame-shaped construction to be provided with for fixing with the column be connected (1-1), and being also provided with brace panel (1-3) between the upper end of described column (1-1) and entablatrance (1-3), to carry out strengthening fixing; Connected by gusset (1-6) between described entablatrance (1-3), cross sill (1-5), the front end of described entablatrance (1-3) is installed with carries out for right bracket (2-1), left tray (2-2) guide rail (1-7) that rolls.
3. the distance-adjusting fork of a kind of synchronous roll adjustment according to claim 1, it is characterized in that: described right bracket (2-1), left tray (2-2) include bracket body (2-4), described bracket body (2-4) upper end is provided with main roller (2-3), lower end is provided with side wheel (2-5).
4. the distance-adjusting fork of a kind of synchronous roll adjustment according to claim 3, is characterized in that: the main shaft of described main roller (2-3) is fixedly arranged on the biside plate of the L shape bracing frame being positioned at bracket body (2-4) upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510396177.2A CN104986697A (en) | 2015-07-08 | 2015-07-08 | Fork positioner capable of achieving synchronous pitch adjustment function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510396177.2A CN104986697A (en) | 2015-07-08 | 2015-07-08 | Fork positioner capable of achieving synchronous pitch adjustment function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104986697A true CN104986697A (en) | 2015-10-21 |
Family
ID=54298628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510396177.2A Pending CN104986697A (en) | 2015-07-08 | 2015-07-08 | Fork positioner capable of achieving synchronous pitch adjustment function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104986697A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107324252A (en) * | 2017-07-11 | 2017-11-07 | 安徽合力股份有限公司 | A kind of goods shelf assembly with roll adjustment bracket |
| CN108715425A (en) * | 2018-08-06 | 2018-10-30 | 安徽合力股份有限公司 | Forklift fixture |
| CN110526177A (en) * | 2019-09-25 | 2019-12-03 | 安徽合力股份有限公司 | A kind of carrying tooling of reinforcing bar volume |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000063097A (en) * | 1998-08-26 | 2000-02-29 | Komatsu Forklift Co Ltd | Fork mover device for forklift |
| CN201485234U (en) * | 2009-08-04 | 2010-05-26 | 厦门厦工机械股份有限公司 | Synchronous device achieving fork of forklift |
| CN201842617U (en) * | 2010-07-16 | 2011-05-25 | 安徽合力股份有限公司安庆车桥厂 | Hanging side shifting adjusting fork for forklift |
| CN204778681U (en) * | 2015-07-08 | 2015-11-18 | 安徽合力股份有限公司 | Roll adjustment fork of synchronous roll adjustment |
-
2015
- 2015-07-08 CN CN201510396177.2A patent/CN104986697A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000063097A (en) * | 1998-08-26 | 2000-02-29 | Komatsu Forklift Co Ltd | Fork mover device for forklift |
| CN201485234U (en) * | 2009-08-04 | 2010-05-26 | 厦门厦工机械股份有限公司 | Synchronous device achieving fork of forklift |
| CN201842617U (en) * | 2010-07-16 | 2011-05-25 | 安徽合力股份有限公司安庆车桥厂 | Hanging side shifting adjusting fork for forklift |
| CN204778681U (en) * | 2015-07-08 | 2015-11-18 | 安徽合力股份有限公司 | Roll adjustment fork of synchronous roll adjustment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107324252A (en) * | 2017-07-11 | 2017-11-07 | 安徽合力股份有限公司 | A kind of goods shelf assembly with roll adjustment bracket |
| CN107324252B (en) * | 2017-07-11 | 2023-03-14 | 安徽合力股份有限公司 | Fork frame assembly with distance adjusting bracket |
| CN108715425A (en) * | 2018-08-06 | 2018-10-30 | 安徽合力股份有限公司 | Forklift fixture |
| CN110526177A (en) * | 2019-09-25 | 2019-12-03 | 安徽合力股份有限公司 | A kind of carrying tooling of reinforcing bar volume |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204778681U (en) | Roll adjustment fork of synchronous roll adjustment | |
| CN104986697A (en) | Fork positioner capable of achieving synchronous pitch adjustment function | |
| CN103148051B (en) | Hydraulic cylinder, hydraulic cylinder control system comprising same and engineering machinery | |
| ITMO20120170A1 (en) | TELESCOPIC ARM FOR OPERATING MACHINES | |
| CN104955763A (en) | A telescopic boom | |
| CN103062140B (en) | Hydraulic device on basis of confluence control mode | |
| CN103423221B (en) | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery | |
| CN202402386U (en) | Balance valve, hydraulic cylinder control loop and crane | |
| CN109099018A (en) | A kind of Multifunction shuttle conveyer energy-saving hydraulic control system | |
| CN105443499A (en) | Multi-stage telescopic oil cylinder, control method thereof and crane | |
| CN104828702B (en) | Crane, reversing control system and its fueller | |
| CN102085851B (en) | Multistage telescopic mechanism sequence control device and engineering equipment comprising same | |
| CN205383139U (en) | Electricity liquid pump control cylinder with differential effect device | |
| CN103994042A (en) | Piston type hydraulic pump with crank connecting rod structure | |
| CN104295545A (en) | Differential speed increasing loop for gantry hoist | |
| CN104176664B (en) | The hydraulic system altered before a kind of anti-telescopic crane boom and crane | |
| CN204152867U (en) | Closed type hydraulic system and comprise the rig of this hydraulic system | |
| CN103047206A (en) | Fast synchronization hydraulic system for segment assembling lifting motion | |
| CN211366884U (en) | Cantilever crane type aerial work platform and cantilever crane telescopic hydraulic system thereof | |
| CN102927078B (en) | A kind of hydraulic jack and there is its pumping mechanism, engineering machinery | |
| CN104179460B (en) | The tower frame lifting device of rotary drill | |
| CN107504140A (en) | Rotating tensioning device for transmission chain and land leveller tandem-driving bogie | |
| CN204041368U (en) | Adopt the piston type hydraulic pumps of brace and connecting rod framework | |
| CN103821789A (en) | Full-closed multi-speed buffering driven hydraulic cylinder | |
| CN202176570U (en) | Telescopic structure oil cylinder group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151021 |
|
| RJ01 | Rejection of invention patent application after publication |