CN201801354U - Electro-hydraulic control gear shift device for mechanical fork truck - Google Patents
Electro-hydraulic control gear shift device for mechanical fork truck Download PDFInfo
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- CN201801354U CN201801354U CN2010205183152U CN201020518315U CN201801354U CN 201801354 U CN201801354 U CN 201801354U CN 2010205183152 U CN2010205183152 U CN 2010205183152U CN 201020518315 U CN201020518315 U CN 201020518315U CN 201801354 U CN201801354 U CN 201801354U
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Abstract
The utility model discloses an electro-hydraulic control gear shift device for a mechanical fork truck, comprising a DC power supply, and parts of a shift switch provided with seven contacts, four relays, a shift solenoid valve, a reversing solenoid valve, a plurality of switches, diodes, etc. The electro-hydraulic control gear shift device for a mechanical fork truck in the utility realizes electric control shift of mechanical fork truck, and makes operation of fork truck more convenient.
Description
Technical field
The utility model belongs to the engineering machinery control technology field, relates to a kind of mechanical forklift and adopts the electrohydraulic control gearshift.
Technical background
Mechanical forklift is a kind of a kind of with fork truck in the engineering truck of transporting, and the mechanical gear box of employing all adopts two lever changes to handle control structures when speed change usually, one of them joystick control yoke car direction of travelling, i.e. and control is advanced or is retreated, and also claims direction lever; Another joystick control gear is promptly controlled moving velocity, also claims the speed bar.The position is equipped with neutral gear therebetween, and just no matter direction lever or speed bar must be by middle Neutral Positions when a gear is changed to another gear.Not only be provided with direction lever and speed bar on the chaufeur right side, also be provided with the multiway valve joystick of control fork truck action simultaneously, it is very inconvenient to operate.
The utility model content
Technical problem to be solved in the utility model is to propose a kind of mechanical forklift to adopt the electrohydraulic control gearshift, has realized the automatically controlled gear shift of mechanical forklift, makes that the operation of fork truck is more convenient.
Technical solution of the present utility model is as follows:
A kind of mechanical forklift adopts the electrohydraulic control gearshift, the positive pole of direct supply connects the input end of driving switch, driving switch has 7 contacts, be respectively contact K1～contact K7, receive the 1st end of first relay behind contact K1 and the contact K4 short circuit again, connect the 1st end of second relay behind contact K2 and the contact K3 short circuit, contact K5 connects the 1st end of the 4th relay and the positive pole of first diode (D), the negative pole of first diode (D) connects the 3rd end of first relay simultaneously and the 3rd end of second relay is the C point, the positive pole of second diode (G) is connected to the C point, the negative pole contact point K6 of second diode (G), contact K6 connects the 1st end of the 3rd relay, and contact K7 connects the 3rd end of the 3rd relay and the 3rd end of the 4th relay; The 1st end of the 2nd end of the 2nd end of the negative pole of direct supply and first relay, the 2nd end of second relay, the 3rd relay and the 2nd end of the 4th relay, gear electromagnetic valve and the 1st end and the 3rd end of the 3rd end and reversing solenoid valve join;
The 4th end of first relay connects the 2nd end of gear electromagnetic valve by K switch 9, the 2nd end of gear electromagnetic valve connects the 5th end of second relay by K switch 10, the 5th end of first relay connects the 4th end of gear electromagnetic valve by K switch 8, and the 4th end of second relay connects the 4th end of gear electromagnetic valve by K switch 11;
The 4th end of the 3rd relay connects the 2nd end of reversing solenoid valve by K switch 12, the 2nd end of reversing solenoid valve connects the 5th end of the 4th relay by K switch 14, the 5th end of the 3rd relay connects the 4th end of reversing solenoid valve by K switch 13, and the 4th end of the 4th relay connects the 4th end of reversing solenoid valve by K switch 15.
Described K switch 8 is a travel switch.
The gear electromagnetic valve is used to control the gear oil cylinder, and reversing solenoid valve is used for control commutation oil cylinder.
Beneficial effect:
Mechanical forklift of the present utility model adopts the electrohydraulic control gearshift, and is simple in structure, and low cost of manufacture is convenient to promote.Than existing fork truck, removed the mechanical forklift declutch shift lever, make the easier design of other structures and the layout of fork truck, gear-change operation is lightly convenient, has improved operation comfort, for fork truck reserves very big development space.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Label declaration: JD1～JD4 is respectively first relay, second relay, the 3rd relay and the 4th relay, DW is the gear electromagnetic valve, and HX is a reversing solenoid valve, and D is first diode, G is second diode, and H connects the interface of deflector oil return (connecting with deflector).
The specific embodiment
Below with reference to figure and specific implementation process the utility model is described in further details:
Embodiment 1:
Referring to Fig. 1, a kind of mechanical forklift adopts the electrohydraulic control gearshift, the positive pole of direct supply connects the input end of driving switch, driving switch has 7 contacts, be respectively contact K1～contact K7, receive the 1st end of first relay behind contact K1 and the contact K4 short circuit again, connect the 1st end of second relay behind contact K2 and the contact K3 short circuit, contact K5 connects the 1st end of the 4th relay and the positive pole of the first diode D, the negative pole of the first diode D connects the 3rd end of first relay simultaneously and the 3rd end of second relay is the C point, the positive pole of the second diode G is connected to the C point, the negative pole contact point K6 of the second diode G, contact K6 connects the 1st end of the 3rd relay, and contact K7 connects the 3rd end of the 3rd relay and the 3rd end of the 4th relay; The 1st end of the 2nd end of the 2nd end of the negative pole of direct supply and first relay, the 2nd end of second relay, the 3rd relay and the 2nd end of the 4th relay, gear electromagnetic valve and the 1st end and the 3rd end of the 3rd end and reversing solenoid valve join;
The 4th end of first relay connects the 2nd end of gear electromagnetic valve by K switch 9, the 2nd end of gear electromagnetic valve connects the 5th end of second relay by K switch 10, the 5th end of first relay connects the 4th end of gear electromagnetic valve by K switch 8, and the 4th end of second relay connects the 4th end of gear electromagnetic valve by K switch 11;
The 4th end of the 3rd relay connects the 2nd end of reversing solenoid valve by K switch 12, the 2nd end of reversing solenoid valve connects the 5th end of the 4th relay by K switch 14, the 5th end of the 3rd relay connects the 4th end of reversing solenoid valve by K switch 13, and the 4th end of the 4th relay connects the 4th end of reversing solenoid valve by K switch 15.
The function declaration of contact and switch:
K1 and K2 be for retreating 2 grades and 1 grade,
K3, K4 be for advancing 1 grade and 2 grades,
K5 is a D Drive,
K6 is for retreating shelves,
K7 is that forward-reverse resets;
K8 is 1 grade of execution and 2 grades of reset switches;
K9 is a travel switch;
K10 is 2 grades of execution and 1 grade of reset switch;
K11 is a travel switch;
K12 is a travel switch;
K13 carries out and retreats reset switch for advancing;
K14 carries out and the reset switch that advances for retreating;
K15 is a travel switch;
Electromagnetic valve is 34 pass two-way valves of H type.
The working process explanation:
1 grade working process advances: remove the gear handle forward, at first connect K7, the commutation gear (is referred to because non-normal flameout, gear is not returned to neutral position state) get back to Neutral Position and (be in the K13 or the K14 of closure state, make the gear that is in non-neutral position be returned to neutral gear position), then connect K5, the forward relay action, the charged K12 outage of K13, the reversing solenoid valve and the electromagnetic valve that advances are simultaneously charged, make reversing solenoid valve carry out the D Drive action, after D Drive puts in place, K13 is disconnected, and electromagnetic valve outage spool is got back to meta, and oil cylinder is parked in forward position, at this moment vehicle is in forward position, to the gear that is not in Neutral Position (K8 or K10 have and be in off-state) (be in the K8 or the K10 of closure state, the make gear electromagnetic valve action) action that resets, make gear be returned to neutral simultaneously; Connect K3 at last, 1 grade of actuating of relay, the charged K10 outage of K8, the charged gear electromagnetic valve of 1 grade of electromagnetic valve of gear electromagnetic valve is carried out 1 grade of action, 1 grade put in place after, K8 disconnects, electromagnetic valve outage spool is got back to meta, oil cylinder is parked in 1 P PARK Position P, and at this moment vehicle is walked forward, and the 1 grade of action of advancing is finished.
Advance 2 grades working process continues to remove the gear handle forward, the K3 outage, the k4 access failure, 1 grade of relay (i.e. the second relay J D2) outage, travel switch k8 is in off-state, and k10 is charged, 2 grades of electromagnetic valves of gear electromagnetic valve are charged, carry out revert action, behind the return, k8, k10 are simultaneously charged, the gear electromagnetic valve returns meta, and revert action is finished.Continue to remove the gear handle forward again, k4 connects charged, and 2 grades of relays are charged, and k10 is charged, 2 grades of electromagnetic valves of gear electromagnetic valve are charged, the gear electromagnetic valve is carried out 2 grades of actions, 2 grades put in place after, K10 disconnects, electromagnetic valve outage spool is got back to meta, oil cylinder is parked in 2 P PARK Position Ps, and at this moment vehicle is walked at a high speed, and the 2 grades of actions of advancing execute.
Advance 2 grades and change to 1 grade of working process, remove the gear handle backward, k4 disconnects when the gear handle is between 1 grade and 2 grades, at this moment the line bag of two gear electromagnetic valves cuts off the power supply simultaneously, because gear is also at 2 P PARK Position Ps, k10 disconnects, the normal open contacting of 2 grades of relays (i.e. the first relay J D1), electric current enters 1 grade of magnet coil by k8,1 grade of electromagnetic valve action, make gear get back to Neutral Position, continue to move shift handle, connect k3,1 grade of electromagnetic valve is charged, carry out 1 grade of action, the gear shift action finishes.
Retreat 1 grade working process: remove the gear handle forward, at first connect K7, the commutation gear (is referred to because non-normal flameout, gear is not returned to neutral position state) get back to Neutral Position and (be in the K13 or the K14 of closure state, make the gear that is in non-neutral position be returned to neutral gear position), then connect k6, the forward relay action, K14 is charged, the K6 outage, the reversing solenoid valve and the electromagnetic valve that advances are simultaneously charged, make reversing solenoid valve carry out the D Drive action, after D Drive puts in place, K14 is disconnected, electromagnetic valve outage spool is got back to meta, oil cylinder is parked in forward position, and at this moment vehicle is in forward position, and the gear that is not in Neutral Position (K8 or K10 have and be in off-state) is resetted (is in the K8 or the K10 of closure state simultaneously, make the action of gear electromagnetic valve) action, make gear be returned to neutral; Connect K2 at last, 1 grade of actuating of relay, the charged K11 outage of K9, the charged gear electromagnetic valve of 1 grade of electromagnetic valve of gear electromagnetic valve is carried out 1 grade of action, 1 grade put in place after, K8 disconnects, electromagnetic valve outage spool is got back to meta, oil cylinder is parked in 1 P PARK Position P, and at this moment vehicle is walked forward, and the 1 grade of action of advancing is finished.
Retreat 2 grades working process, continue to remove the gear handle forward, the K2 outage, the K1 access failure, 1 grade of relay (i.e. the second relay J D2) outage, travel switch K9 is in off-state, and K11 is charged, 2 grades of electromagnetic valves of gear electromagnetic valve are charged, carry out revert action, behind the return, K9, K11 are simultaneously charged, the gear electromagnetic valve returns meta, and revert action is finished.Continue to remove the gear handle forward again, k4 connects charged, and 2 grades of relays are charged, and K11 is charged, 2 grades of electromagnetic valves of gear electromagnetic valve are charged, the gear electromagnetic valve is carried out 2 grades of actions, 2 grades put in place after, K11 disconnects, electromagnetic valve outage spool is got back to meta, oil cylinder is parked in 2 P PARK Position Ps, and at this moment vehicle is walked at a high speed, and the 2 grades of actions of advancing execute.
Retreat 2 grades and change to 1 grade of working process, remove the gear handle backward, K1 disconnects when the gear handle is between 1 grade and 2 grades, at this moment the line bag of two gear electromagnetic valves cuts off the power supply simultaneously, because gear is also at 2 P PARK Position Ps, K11 disconnects, the normal open contacting of 2 grades of relays (i.e. the first relay J D1), electric current enters 1 grade of magnet coil by K9,1 grade of electromagnetic valve action, make gear get back to Neutral Position, continue to move shift handle, connect K2,1 grade of electromagnetic valve is charged, carry out 1 grade of action, the gear shift action finishes.
The state table of each switch and contact is as above shown (have+symbol for connecting "on" position).
Claims (2)
1. a mechanical forklift adopts the electrohydraulic control gearshift, it is characterized in that, the positive pole of direct supply connects the input end of driving switch, driving switch has 7 contacts, be respectively contact K1～contact K7, receive the 1st end of first relay behind contact K1 and the contact K4 short circuit again, connect the 1st end of second relay behind contact K2 and the contact K3 short circuit, contact K5 connects the 1st end of the 4th relay and the positive pole of first diode (D), the negative pole of first diode (D) connects the 3rd end of first relay simultaneously and the 3rd end of second relay is the C point, the positive pole of second diode (G) is connected to the C point, the negative pole contact point K6 of second diode (G), contact K6 connects the 1st end of the 3rd relay, and contact K7 connects the 3rd end of the 3rd relay and the 3rd end of the 4th relay; The 1st end of the 2nd end of the 2nd end of the negative pole of direct supply and first relay, the 2nd end of second relay, the 3rd relay and the 2nd end of the 4th relay, gear electromagnetic valve and the 1st end and the 3rd end of the 3rd end and reversing solenoid valve join;
The 4th end of first relay connects the 2nd end of gear electromagnetic valve by K switch 9, the 2nd end of gear electromagnetic valve connects the 5th end of second relay by K switch 10, the 5th end of first relay connects the 4th end of gear electromagnetic valve by K switch 8, and the 4th end of second relay connects the 4th end of gear electromagnetic valve by K switch 11;
The 4th end of the 3rd relay connects the 2nd end of reversing solenoid valve by K switch 12, the 2nd end of reversing solenoid valve connects the 5th end of the 4th relay by K switch 14, the 5th end of the 3rd relay connects the 4th end of reversing solenoid valve by K switch 13, and the 4th end of the 4th relay connects the 4th end of reversing solenoid valve by K switch 15.
2. mechanical forklift according to claim 1 adopts the electrohydraulic control gearshift, it is characterized in that described K switch 8 is a travel switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205183152U CN201801354U (en) | 2010-09-06 | 2010-09-06 | Electro-hydraulic control gear shift device for mechanical fork truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205183152U CN201801354U (en) | 2010-09-06 | 2010-09-06 | Electro-hydraulic control gear shift device for mechanical fork truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201801354U true CN201801354U (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205183152U Expired - Fee Related CN201801354U (en) | 2010-09-06 | 2010-09-06 | Electro-hydraulic control gear shift device for mechanical fork truck |
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| Country | Link |
|---|---|
| CN (1) | CN201801354U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307274A (en) * | 2013-06-07 | 2013-09-18 | 江苏柳工机械有限公司 | Electric control gear shift control system of loading machine |
| CN109869477A (en) * | 2019-03-28 | 2019-06-11 | 徐州徐工施维英机械有限公司 | A kind of gearbox gear-shift protection system and engineering machinery |
-
2010
- 2010-09-06 CN CN2010205183152U patent/CN201801354U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307274A (en) * | 2013-06-07 | 2013-09-18 | 江苏柳工机械有限公司 | Electric control gear shift control system of loading machine |
| CN109869477A (en) * | 2019-03-28 | 2019-06-11 | 徐州徐工施维英机械有限公司 | A kind of gearbox gear-shift protection system and engineering machinery |
| CN109869477B (en) * | 2019-03-28 | 2024-01-26 | 徐州徐工施维英机械有限公司 | Gear box gear shift protection system and engineering machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20150906 |
|
| EXPY | Termination of patent right or utility model |