CN104961074A - Multi-way valve control device, forklift with same and assembling method - Google Patents
Multi-way valve control device, forklift with same and assembling method Download PDFInfo
- Publication number
- CN104961074A CN104961074A CN201510420295.2A CN201510420295A CN104961074A CN 104961074 A CN104961074 A CN 104961074A CN 201510420295 A CN201510420295 A CN 201510420295A CN 104961074 A CN104961074 A CN 104961074A
- Authority
- CN
- China
- Prior art keywords
- way valve
- slide block
- joystick
- valve operator
- upper 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.)
- Granted
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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
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a multi-way valve control device, a forklift with the same and an assembling method. The multi-way valve control device comprises a multi-way valve and a control rod, and further comprises a fixed supporting shaft, a slide block connected with the supporting shaft in a rotating mode, and a connecting rod connected with the slide block in a rotating mode. The control rod is connected with the slide block. The connecting rod is connected with a piston rod of the multi-way valve in a rotating mode. According to the multi-way valve control device of the forklift, the fixed supporting shaft and the control rod are adopted, the slide block and the connecting rod are connected with the piston rod of the multi-way valve, and therefore a formed transmission mechanism is simple, the freedom degree of the transmission mechanism is 1, the determined motion is achieved, the accurate transmission route is ensured, and the control device is small in size, small in occupied space and convenient to arrange.
Description
Technical field
The invention belongs to fork truck technical field, specifically, the present invention relates to a kind of Multi-way valve operator and there is its fork truck.
Background technology
Forklift workability relate to the goods device of its carrying is hoisted, is declined, the operational motion such as sidesway, these operations all need to be realized by a set of multi-way valve manipulation control device.
The multiway valve of existing fork truck is installed on instrument calibration, is positioned at the forward right side of driver, in driving procedure, the right hand of chaufeur need stretch to front, is held by bar handle, realizes the various handling labors of fork truck, but the time that arm is forwards stretched is oversize, driver is easily made to produce sense of fatigue.
In addition, the parts that existing Multi-way valve operator comprises are many, complex structure, and during operation, drive path is complicated, error is large, causes installing difficulty, takes up room large, is not easy to arrange, easily increases hood volume in hood.
Summary of the invention
The present invention is intended at least to solve one of technical matters existed in prior art.For this reason, the invention provides that a kind of structure is simple, the accurate Multi-way valve operator of drive path and there is its fork truck.
To achieve these goals, the technical scheme that the present invention takes is: Multi-way valve operator, comprise multiway valve and joystick, the pipe link also comprising the pivot shaft be fixedly installed, the slide block be rotationally connected with pivot shaft and be rotationally connected with slide block, described joystick is connected with slide block, and pipe link is also connected with the piston rod rotation of described multiway valve.
Described slide block one end is connected with described pivot shaft, and the other end is connected with described pipe link, and the point of connection of described joystick and described slide block is between slide block two ends.
Described slide block is provided with the through hole allowing described pivot shaft pass.
Described joystick and described slide block are for being threaded.
The lower end of described joystick is provided with outside thread, and described slide block is provided with the internal thread hole coordinated with joystick, and joystick is also fixed by jam nut.
Multi-way valve operator also comprises lower bracket, and described pivot shaft is connected with lower bracket with described multiway valve.
Multi-way valve operator also comprises upper bracket and is positioned at the cover panel be connected with upper bracket above upper bracket and by bolt, and cover panel is provided with the strip hole allowing described joystick pass, and upper bracket and cover panel are provided with the waist shaped hole allowing bolt pass.
Described upper bracket and described lower bracket are bolted, and upper bracket is provided with the waist shaped hole allowing bolt pass.
Present invention also offers a kind of fork truck, comprise the hood be arranged in operator's compartment on the right side of seat, also comprise above-mentioned Multi-way valve operator, described hood is provided with the opening allowing Multi-way valve operator insert.
Present invention also offers a kind of assembly method of Multi-way valve operator, comprise the steps:
Slide block is assembled on pivot shaft;
Pivot shaft, upper bracket and multiway valve are assembled on lower bracket;
With bearing pin, pipe link is assembled between the piston rod of multiway valve and slide block;
Joystick is assembled on slide block;
Cover panel is assembled on upper bracket.
Slide block is provided with the through hole allowing described pivot shaft pass, and if any error in fitting process, moves axially elimination error by adjusting slider on pivot shaft.
If any error in cover panel fitting process, eliminate error by regulating the relative position of the relative position of upper bracket and lower bracket, cover panel and upper bracket.
Forklift multi-way valve operating control of the present invention, by arranging fixing pivot shaft, joystick is also connected with the piston rod of multiway valve with pipe link by slide block, the transmission device formed is simple, and the degree of freedom of transmission device is 1, has the motion determined, thus guarantee that drive path is accurate, and operating control volume is little, take up room little, be convenient to arrange.
Accompanying drawing explanation
This specification sheets comprises the following drawings, shown content respectively:
Fig. 1 is the structural representation of Multi-way valve operator of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the cutaway view of A-A in Fig. 2;
Fig. 4 is the birds-eye view of Fig. 1;
Fig. 5 is drive path schematic diagram;
Fig. 6 is the structural representation of upper bracket;
Fig. 7 is the assembly drowing of transmission device and joystick and multiway valve;
Fig. 8 is the assembling design sketch of Multi-way valve operator of the present invention on fork truck;
Be labeled as in figure:
1, joystick; 2, cover panel; 21, the first waist shaped hole; 3, upper bracket; 31, the first side plate; 32, the second side plate; 33, the second waist shaped hole; 34, the 3rd waist shaped hole; 4, slide block; 5, pivot shaft; 6, multiway valve; 61, piston rod; 7, lower bracket; 8, pipe link; 9, hood; 10, jam nut.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, be described in further detail the specific embodiment of the present invention, object helps those skilled in the art to have more complete, accurate and deep understanding to design of the present invention, technical scheme, and contribute to its enforcement.
As shown in Figures 1 to 7, the invention provides a kind of Multi-way valve operator of fork truck, carrying out hoisting for controlling fork truck, declining, the action such as sidesway, this Multi-way valve operator comprises multiway valve 6 and joystick 1, the pipe link 8 also comprising the pivot shaft 5 be fixedly installed, the slide block 4 be rotationally connected with pivot shaft 5 and be rotationally connected with slide block 4, joystick 1 is fixedly connected with slide block 4, and pipe link 8 is also rotationally connected with the piston rod 61 of multiway valve 6.Fork truck driver stirs joystick 1, and movable slider 4 can be with synchronously to rotate around pivot shaft 5, and slide block 4 also drives the piston rod 61 of multiway valve 6 to move linearly by pipe link 8, completes the hoisting of fork truck, declines or the action such as sidesway.
Specifically, as shown in Figures 1 to 7, this Multi-way valve operator also comprises upper bracket 3, lower bracket 7 and cover panel 2.As shown in Figure 8, this Multi-way valve operator is arranged in the hood 9 in forklift steering room, hood 9 is arranged at the right side of seat in operator's compartment, hood 9 is provided with the opening allowing Multi-way valve operator insert, cover panel 2 is namely for hiding this opening, and the installation of Multi-way valve operator does not affect the opening and closing of hood 9.This Multi-way valve operator is positioned at the right side of driver in forklift steering room, and the long-term arm of driver can be avoided during operation to protract the sense of fatigue brought, and the process that driver is operated is more comfortable.
The structure of the multiway valve 6 that this Multi-way valve operator adopts as well known in the skilled person, does not repeat them here.The multiway valve 6 of this Multi-way valve operator can select two panels valve, three plate valves or four plate valves, each plate valve has a piston rod 61, piston rod 61 is connected with spool, multiway valve 6 often increases by a plate valve, piston rod 61 quantity will correspondingly increase, therefore piston rod 61 quantity is respectively 2,3 or 4, and joystick 1, slide block 4 are consistent with the quantity of piston rod 61 with the quantity of pipe link 8.
As shown in Figures 1 to 7, pivot shaft 5 is for being fixedly installed on lower bracket 7, and multiway valve 6 is by bolts assemblies on lower bracket 7, and lower bracket 7 is by vertical being assemblied on vehicle frame of bolt.Pivot shaft 5 is the level of state on lower bracket 7, and on rear side of the top being positioned at multiway valve 6, the two ends of pivot shaft 5 are fixedly connected with lower bracket 7, and pivot shaft 5 is namely by Complete Bind, degree of freedom is 0, and the axis of pivot shaft 5 and slide block 4 parallel with the axis of the hinge-point of pipe link 8.
As shown in Figure 1 to Figure 3, multiway valve 6 is fixedly connected with it at the rear of lower bracket 7, the front side of lower bracket 7 is the front side wall of fork truck hood 9, multiway valve 6 needs by joint connected pipes road, and multiway valve 6 is arranged at the rear of lower bracket 7, the oil pipe line be connected with multiway valve 6 all can be arranged in the rear of multiway valve 6, thus can arrange very easily, easy for installation, without the need to changing hood shape, hood volume can not be increased.
As shown in Figure 3 and Figure 5, one end and the pivot shaft 5 of slide block 4 are rotationally connected, being rotationally connected with the upper end of pipe link 8 of the other end, lower end and the vertical piston rod 61 of pipe link 8 are rotationally connected, and the lower end of joystick 1 and the point of connection of slide block 4 are between slide block 4 two ends.The manipulation principle of this Multi-way valve operator is as follows:
Slide block 4 and joystick 1 can regard a component as, therefore one 3 components, 3 revolute pairs, 1 moving sets, 0 higher pair is had in Multi-way valve operator, so degree of freedom F=3*3-2*4-0=1, therefore this device only has one degree of freedom, driving link is joystick 1, driving link quantity equals the degree of freedom of mechanism, and therefore this this device has the motion determined.Arrow shown in Fig. 5 be joystick 1 stir direction, in operating process, driver stirs forward joystick 1, slide block 4 to lower swing, drive pipe link 8 move downward, pipe link 8 drives piston rod 61 to move downward; When driver stirs joystick 1 backward, sense of motion is just contrary, and slide block 4 upwards swings, and drives pipe link 8 upward movement, drives piston rod 61 upward movement; When unclamping joystick 1, piston rod 61 gets back to initial position by the effect of multiway valve 6 inner spring power, and now piston rod 61 is driving link, and connecting rod mechanism still has the motion determined, therefore can drive joystick 1 self-aligning.
As preferably, as shown in Figure 3, the end of slide block 4 is provided with the manhole allowing pivot shaft 5 pass, this through hole is unthreaded hole, and pivot shaft 5 is circular shaft, when assembling, slide block 4 can move vertically on pivot shaft 5, carries out position adjustments, the error be used in the appearance of adjustment assembly process.
As preferably, as shown in Figure 3, joystick 1 and slide block 4 are for being threaded, the lower end of joystick 1 is provided with outside thread, be provided with the internal thread hole coordinated with joystick 1 in the middle part of slide block 4, the lower end of joystick 1 sheathed one are the jam nut 10 be threaded with it, to insert in the internal thread hole of slide block 4 and after regulating the height of joystick 1 in joystick 1 lower end, by tightening jam nut 10 downwards, joystick 1 is fixed on slide block 4.Joystick 1 is arranged to be threaded with slide block 4, thus is convenient to the height regulating joystick 1, is easy to guarantee that all joysticks 1 assemble rear position and can unify, improves aesthetic property.
As shown in Figure 1, upper bracket 3 is connected with the upper end of lower bracket 7, and cover panel 2 is positioned at the top of upper bracket 3, and cover panel 2 is provided with the multiple strip holes allowing joystick 1 pass, strip hole for being arranged side by side, the length of strip hole to guarantee joystick 1 can before and after stir and put in place.The quantity of strip hole is identical with the quantity of the maximum attachable joystick 1 of multiway valve 6, and when the actual installation quantity of joystick 1 is less than the number of strip hole, all the other strip hole Rubber Parts not inserting joystick 1 are blocked.
Arranging upper bracket 3 is be convenient to fixing cover panel 2, the structure of upper bracket 3 as shown in Figure 6, upper bracket 3 is adopt steel plate bending to make and the structure of cross section roughly in L-type, it comprises the first side plate 31 and the second side plate 32 be connected, first side plate 31 is the flat board for contacting with cover panel 2, second side plate 32 is vertically arrange, and a lateral edges of the first side plate 31 is connected with the upper end of the second side plate 32.Cover panel 2 is fixedly connected with the first side plate 31 by bolt, and the second side plate 32 is fixedly connected with by the upper end of bolt with lower bracket 7.
Because cover panel 2 area is comparatively large, in order to stable installation cover panel 2, the upper bracket 3 of below is for being symmetrically set with two.As preferably, for the ease of regulating the position of cover panel 2 when assembling, as shown in Figure 4 and Figure 6, cover panel 2 is provided with the first waist shaped hole 21 allowing bolt pass, first side plate 31 of upper bracket 3 is provided with the second waist shaped hole 33 allowing bolt pass, the first waist shaped hole 21 on cover panel 2 parallels with the length direction of strip hole, for fore-and-aft direction is extended, the length direction of the second waist shaped hole 33 and the length direction of the first waist shaped hole 21 perpendicular, for left and right directions is extended, and the first waist shaped hole 21 and aligned in position identical with the quantity of the second waist shaped hole 33.And, second side plate 32 of upper bracket 3 is provided with the 3rd waist shaped hole 34 allowing bolt pass, lower bracket 7 is provided with the mounting hole allowing bolt pass with the 3rd waist shaped hole 34 aligned in position, the length direction of the 3rd waist shaped hole 34 and the length direction of the second waist shaped hole 33 perpendicular, and be vertically extended.When upholstered covering 2, when second side plate 32 of upper bracket 3 is connected with lower bracket 7, upper bracket 3 can move up and down, when cover panel 2 is connected with upper bracket 3, cover panel 2 can sway, mounting hole simultaneously on cover panel 2 is the first waist shaped hole 21 of fore-and-aft direction, and therefore cover panel 2 can also move forward and backward.Therefore, cover panel 2 can realize the adjustment of omnibearing position, top to bottom, left and right, front and rear, is used for the error occurred in adjustment assembly process.
The Multi-way valve operator of said structure, size is less, and structure is very compact, and the space accounted in hood 9 is little, can not increase the size of hood 9, easily arrange; And the drive mechanism of Multi-way valve operator is simple, drive path is determined.The critical component of this Multi-way valve operator can carry out position adjustments when assembling, and assembling is simple, and the accumulated error brought in fitting process is little, assembling better effects if.
For the Multi-way valve operator of said structure, its assembly method comprises the steps:
1, slide block 4 is assembled on pivot shaft 5;
2, lower bracket 7 is assembled on forklift frame, pivot shaft 5, upper bracket 3 and multiway valve 6 are assembled on lower bracket 7;
3, with bearing pin, pipe link 8 is assembled between the piston rod 61 of multiway valve 6 and slide block 4;
4, joystick 1 is assembled on slide block 4;
5, cover panel 2 is assembled on upper bracket 3.
In above-mentioned assembly method, because slide block 4 end is provided with the through hole allowing pivot shaft 5 pass, if any error in fitting process, move axially on pivot shaft 5 by adjusting slider 4, slide block 4 is moved to the position that can be connected with joystick 1 with pipe link 8, reach the object eliminating error.
In above-mentioned assembly method, if any error in cover panel 2 fitting process, because upper bracket 3 and cover panel 2 are provided with waist shaped hole, eliminate error by regulating the relative position of the relative position of upper bracket 3 and lower bracket 7, cover panel 2 and upper bracket 3.
Present invention also offers a kind of fork truck, as shown in Figure 8, it comprises the hood 9 be arranged in operator's compartment on the right side of seat, also comprises above-mentioned Multi-way valve operator, and hood 9 is provided with the opening allowing Multi-way valve operator insert.The concrete structure of this Multi-way valve operator can refer to Fig. 1 to Fig. 7, does not repeat them here.The Multi-way valve operator in above-described embodiment is comprised, so it has all advantages of above-mentioned Multi-way valve operator due to fork truck of the present invention.
Below by reference to the accompanying drawings to invention has been exemplary description.Obviously, specific implementation of the present invention is not subject to the restrictions described above.As long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; Or without improvement, above-mentioned design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention.
Claims (10)
1. Multi-way valve operator, comprise multiway valve and joystick, it is characterized in that, the pipe link also comprising the pivot shaft be fixedly installed, the slide block be rotationally connected with pivot shaft and be rotationally connected with slide block, described joystick is connected with slide block, and pipe link is also connected with the piston rod rotation of described multiway valve.
2. Multi-way valve operator according to claim 1, is characterized in that, described slide block one end is connected with described pivot shaft, and the other end is connected with described pipe link, and the point of connection of described joystick and described slide block is between slide block two ends.
3. Multi-way valve operator according to claim 1 and 2, is characterized in that, described slide block is provided with the through hole allowing described pivot shaft pass.
4. Multi-way valve operator according to claim 3, is characterized in that, described joystick and described slide block are for being threaded.
5. Multi-way valve operator according to claim 4, is characterized in that, the lower end of described joystick is provided with outside thread, and described slide block is provided with the internal thread hole coordinated with joystick, and joystick is also fixed by jam nut.
6. Multi-way valve operator according to claim 4, is characterized in that, also comprises lower bracket, and described pivot shaft is connected with lower bracket with described multiway valve.
7. Multi-way valve operator according to claim 6, it is characterized in that, also comprise upper bracket and be positioned at the cover panel be connected with upper bracket above upper bracket and by bolt, cover panel is provided with the strip hole allowing described joystick pass, and upper bracket and cover panel are provided with the waist shaped hole allowing bolt pass.
8. Multi-way valve operator according to claim 7, is characterized in that, described upper bracket and described lower bracket are bolted, and upper bracket is provided with the waist shaped hole allowing bolt pass.
9. fork truck, comprises the hood be arranged in operator's compartment on the right side of seat, it is characterized in that, also comprise the arbitrary described Multi-way valve operator of claim 1 to 8, described hood is provided with the opening allowing Multi-way valve operator insert.
10., according to the assembly method of the arbitrary described Multi-way valve operator of claim 1 to 9, it is characterized in that, comprise step:
Slide block is assembled on pivot shaft;
Pivot shaft, upper bracket and multiway valve are assembled on lower bracket;
With bearing pin, pipe link is assembled between the piston rod of multiway valve and slide block;
Joystick is assembled on slide block;
Cover panel is assembled on upper bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510420295.2A CN104961074B (en) | 2015-05-12 | 2015-07-15 | Multi-way valve operator, there is its fork truck and assembly method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015102405257 | 2015-05-12 | ||
| CN201510240525 | 2015-05-12 | ||
| CN201510420295.2A CN104961074B (en) | 2015-05-12 | 2015-07-15 | Multi-way valve operator, there is its fork truck and assembly method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104961074A true CN104961074A (en) | 2015-10-07 |
| CN104961074B CN104961074B (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510420295.2A Active CN104961074B (en) | 2015-05-12 | 2015-07-15 | Multi-way valve operator, there is its fork truck and assembly method |
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| Country | Link |
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| CN (1) | CN104961074B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605290A (en) * | 2016-03-01 | 2016-05-25 | 安徽梯易优叉车有限公司 | Flexible manipulating device for hydraulic valve |
| CN105692508A (en) * | 2015-11-02 | 2016-06-22 | 林德（中国）叉车有限公司 | Multi-way valve control handle connection device and multi-way valve control mechanism |
| CN106167240A (en) * | 2016-08-25 | 2016-11-30 | 安徽合力股份有限公司 | There is the forklift multi-way valve of single connecting rod operating mechanism |
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| CN201647941U (en) * | 2010-04-02 | 2010-11-24 | 安徽合力股份有限公司 | Control mechanism for multiple reversing valve of 12 tons forklift |
| CN103407936A (en) * | 2013-08-22 | 2013-11-27 | 安徽合力股份有限公司 | Multi-way valve manipulation control device |
| CN204643756U (en) * | 2015-05-12 | 2015-09-16 | 中联重科安徽工业车辆有限公司 | Multi-way valve operator and there is its fork truck |
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2015
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| EP0145684A2 (en) * | 1983-10-05 | 1985-06-19 | Hydrino Ab | A levercontrol assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105692508A (en) * | 2015-11-02 | 2016-06-22 | 林德（中国）叉车有限公司 | Multi-way valve control handle connection device and multi-way valve control mechanism |
| CN105692508B (en) * | 2015-11-02 | 2018-11-30 | 林德（中国）叉车有限公司 | A kind of multi-way valve control crank attachment device and multi-way valve operating mechanism |
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| CN106167240A (en) * | 2016-08-25 | 2016-11-30 | 安徽合力股份有限公司 | There is the forklift multi-way valve of single connecting rod operating mechanism |
| CN106167240B (en) * | 2016-08-25 | 2018-05-25 | 安徽合力股份有限公司 | Forklift multi-way valve with single connecting rod operating mechanism |
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|---|---|
| CN104961074B (en) | 2017-12-22 |
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