CN2470177Y - Electro-hydraulic automatic control apparatus for driving front wheel of tractor - Google Patents
Electro-hydraulic automatic control apparatus for driving front wheel of tractor Download PDFInfo
- Publication number
- CN2470177Y CN2470177Y CN 01217000 CN01217000U CN2470177Y CN 2470177 Y CN2470177 Y CN 2470177Y CN 01217000 CN01217000 CN 01217000 CN 01217000 U CN01217000 U CN 01217000U CN 2470177 Y CN2470177 Y CN 2470177Y
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- oil
- spring
- valve pocket
- gear box
- pressure limiting
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Abstract
The utility model provides a tractor front wheel driving electro- liquid automatic control device, structurally composed of a solenoid operated hydraulic valve and controlling transfer cases which are connected through an oil pipe. Compared with prior art, the tractor front wheel driving electro-liquid automatic control device of the utility model has the advantages of simple structure, practicality and unique design. Combining the technology of automatic combining of the brake case and the transfer cases, and the technology of automatic control of the front wheel driving electro-liquid, the utility model realize that the transfer cases combine automatically when the tractor brakes, with a speed one time higher than a tractor without said technologies and a braking distance reduced by fifty percent. The utility model greatly improves the running safety of the tractor, thus having big utility value.
Description
The utility model relates to a kind of big-powered tractor accessory, specifically a kind of trac. f-w-d electricity liquid automatic control device.
The trac. variable speed control of prior art and control of braking are to adopt hand manual transmission and foot-operated hydraulic brake system, the in use existing deficiency of the speed-change control device of prior art and braking force control system is the labour intensity that the manual shift speed change has increased chaufeur, aspect control of braking, mostly the trac. of prior art is back-wheel drive and trailing wheel braking, in actual braking procedure, because the effect of inertia in the trac. driving process, can make the center reach of trac., the trailing wheel and the ground-surface adhesive ability of trac. are reduced, had a strong impact on the braking effect of trac..
The purpose of this utility model provides a kind of driving and control of braking needs that can satisfy big-powered tractor, realize easy to operate, drive comfortable, alleviate the labour intensity of chaufeur, switch on or off low pressure oil by the electric switch control electromagnetic valve, realize that the control change speed gear box is respectively when the separation and the electric liquid automatic control device of the trac. f-w-d of the f-w-d four-wheel braking that combines of position auxiliary gear box towards auxiliary gear box.
This trac. f-w-d electricity liquid automatic controls has adopted the electromagnetically-operated hydraulic valve, control auxiliary gear box combination with separate, removed traditional auxiliary gear box in conjunction with disengagement gear, simplified lever piece member, satisfied the designing requirement that the big-powered tractor control mechanism is simple, reliable, manipulation is comfortable, and provide convenience for designing closed operator's compartment.
The purpose of the utility model electricity liquid automatic control device realizes in the following manner;
1) as shown in Figure 1, the hydraulic oil at P place is the oil return of hydraulic steering gear, and hydraulic oil at first backs down the pressure limiting spring, gets back in the back axle by the oil pipe at T place, and the pressure at P place is about 1.2～1.3MPa; This moment, electromagnetic valve was not switched on, and the oil circuit that leads to auxiliary gear box blocks, and auxiliary gear box is in bonding state.
2) after the electromagnetic valve energising, the oil outlet of P place pressure oil by electromagnetic valve A place enters claw collar in the auxiliary gear box in conjunction with annular separating oil cylinder, the elastic force of the pull back spring that hydraulic oil overcomes backs down claw collar and separates with final gear, and the driven gear no power takeoff is meshed with final gear.
3) after the electromagnetic valve outage, spool cuts off the pressure oil that leads to auxiliary gear box under the effect of electromagnetic valve pull back spring, and claw collar under the effect of pull back spring, is got back to back axle by electromagnetic valve in conjunction with the hydraulic oil in the annular separating oil cylinder, the rapid combination of auxiliary gear box.
Adopt two-wheel drive during general trac. hauling operation, this moment, the weight transfer took place in the trac. glancing impact, and trac. trailing wheel adhesive weight is about complete machine weight 50%, and this moment, the braking force of trac. was that complete machine weight 50% multiply by adhesion value φ, i.e. 0.5 φ G.After trac. adopts the automatic combination technology of trac. glancing impact auxiliary gear box, the trac. glancing impact, the trac. f-w-d articulates automatically, the slip torque of front-wheel passes to rear brake by driving system, trac. complete machine weight can produce adheres to moment, the maximum braking force that is trac. is that the complete machine weight of trac. multiply by adhesion value φ, i.e. φ G.This shows, adopt this technology after, the braking force of trac. is doubled, stopping distance has shortened half, has increased the travel safety of trac..
Chaufeur is as long as press switch in operator's compartment, the combination that just can realize before driving with separate, steering unit is simple, reliably.
Accompanying drawing 1 is the structural representation of trac. f-w-d electricity liquid automatic control device electromagnetic valve and auxiliary gear box;
Accompanying drawing 2 is the principle of work scheme drawing of trac. f-w-d electricity liquid automatic control device.
Below with reference to Figure of description electro-hydraulic automatic control apparatus for driving front wheel of tractor of the present utility model being done Explain.
Electro-hydraulic automatic control apparatus for driving front wheel of tractor of the present utility model, its structure are by electromagnetically-operated liquid Pressure valve and control transfer case consist of, and electromagnetically-operated hydraulic pressure valve is connected with the control transfer case by petroleum pipeline 1.
Electromagnetically-operated hydraulic pressure valve be by valve body 2, electromagnetic wire winding 3, magnetic valve armature 4, sliding bar 5, bullet resets Spring 6, spool 7, valve pocket 8, oil pressure sensor 9, spring fairlead 10, pressure limiting spring 11, adjustment pad 12, pressure limiting spool 13 and oil inlet pipe joint 14 consist of, and valve body 2 has been set down electromagnetism valve pocket and pressure limiting valve The chamber is made up of electromagnetic wire winding 3, magnetic valve armature 4, valve pocket 8, spool 7, sliding bar 5 and back-moving spring 6 Magnetic valve is arranged on electromagnetism valve pocket left end, and right-hand member and the spool 7 of sliding bar 5 join, and back-moving spring 6 is arranged on electricity Between magnet valve armature 4 and the sliding bar 5, oil pressure sensor 9 is arranged on the right-hand member of electromagnetism valve pocket, with the control transfer case The oil-out 15 that joins is arranged on the middle part of electromagnetism valve pocket, has into oilhole and spill port on the hollow spool 7, Also have into oilhole and spill port on the valve pocket 8, it is respectively logical through oil inlet passage 16 and oil return to advance oilhole and spill port Road 17 communicates with the pressure limiting valve pocket.
Be arranged on the left end of pressure limiting valve pocket with the oil pump oil inlet pipe joint 14 that joins, spring fairlead 10 is arranged on limit The right-hand member in pressure valve chamber, pressure limiting spool 13 is arranged on the centre of pressure limiting valve pocket, and the right-hand member of pressure limiting spring 11 is positioned at bullet Among the centre bore of spring fairlead 10, the other end of pressure limiting spring 11 is positioned at the centre bore of pressure limiting spool 13 right-hand members Among, the oil returning pipe joint 31 that communicates with store oil case 35 is arranged on the right-hand member of spring fairlead 10.
The control transfer case is by transfer case housing 32, end cap 33, transfer case output shaft 34, sealing cover 18, axle Hold 19, output shaft location block plate 20, return spring 21, dental inlay cover 22, main transmission gear 23, driven gear 24 and oil inlet pipe joint 25 form, transfer case output shaft 34 is fixed on by bearing among the transfer case housing 15, tooth Be provided with spline on nested 22 the inner circle and be meshed with spline on transfer case output shaft 34 cylindricals, dental inlay cover 22 Right-hand member join main transmission gear 23 and driven gear 24 phases by moving tooth 26 and main transmission gear 23 left sides Engagement outputting power, return spring 21 are arranged between dental inlay cover 22 and the output shaft location block plate 20, the sealing cover 18 are fixed on the left part of transfer case housing 15 by end cap 16, and oil inlet pipe joint 25 passes branch Moving tank shell 15 joins with the oilhole 27 that advances of opening on the cylindrical of sealing cover 18, advances oilhole 27 on the sealing cover 18 Join with the oil transportation channel 28 of opening in the middle of transfer case output shaft 34, the right-hand member of oil transportation channel 28 be arranged on tooth Nested 22 inner circle right sides communicate the both sides of annular oil groove 29 with annular oil groove 29 between the transfer case output shaft 17 Be provided with combined seal ring 30.
Embodiment:
Its processing and fabricating of trac. f-w-d electricity liquid automatic control device of the present utility model is very simple and convenient, adds the manufacturing process processing and fabricating by utility-type tractor shown in the by specification accompanying drawing and gets final product.
In order to make full use of the slip torque of four-wheel drive tractor front-wheel, the lock torque of tractor brake is increased, increase the braking force and the braking deceleration of trac., shorten the braking time and the distance of trac..
The solenoid control relay often closes, and electric current flows to magnet coil in the electromagnetic valve by the solenoid control relay, makes electromagnet motion in the electromagnetic valve, open the oil circuit that leads to auxiliary gear box, hydraulic oil backs down the claw collar in the auxiliary gear box, and auxiliary gear box separates, and trac. is in the two-wheel drive state.
When press four wheel drive in conjunction with switch or left and right hydraulic braking switch all in conjunction with the time, the work of solenoid control relay, inhale the open electromagnetic valve control relay, magnet coil outage in the electromagnetic valve, electromagnet return in the electromagnetic valve, the oil circuit that leads to auxiliary gear box blocks, the auxiliary gear box combination, and trac. is in the four wheel drive state.
Adopt two-wheel drive during the operation of trac. road transport, brake pedal must be chain; When running into emergency situation, when chaufeur is stepped on brake pedal, all combinations of left and right hydraulic braking switch, the combination of trac. auxiliary gear box, trac. is in the four wheel drive state.Loosen the brake, before driving is thrown off, and recovers the two-wheel drive state.
Left and right hydraulic braking switch is installed in series.During one side brake, trac. still is in the two-wheel drive state.Have only brake pedal chain, when stepping on brake pedal simultaneously, propons could in conjunction with.
Left and right hydraulic braking switch combines switch in parallel with four wheel drive and installs, the combination that does not influence chaufeur control propons with separate, same, trac. is at the four wheel drive state, stepping on brake pedal does not influence the four wheel drive combination.
Electro-hydraulic automatic control apparatus for driving front wheel of tractor of the present utility model is compared with existing technology, and has knot Structure is simple and practical, designs ingenious uniqueness. The automatic combination technology of tractor braking transfer case and front-wheel drive electricity liquid Automatic control technology combines, and has realized tractor automatic combination of transfer case when braking, braking deceleration Increased one times, braking distance has reduced 50%, has greatly improved the travel safety of tractor, and has established The ingenious uniqueness of meter design, simple in structure, compact. Owing to adopted low-pressure system, pressure is low, to hydraulic pressure spare Less demanding, the characteristics such as with low cost. Make the big-powered tractor of China reach leading domestic, earlier international Water inlet is flat. Thereby, have good value for applications.
Except the described technology feature of specification, be the known technology of those skilled in the art.
Claims (4)
1. trac. f-w-d electricity liquid automatic control device comprises electromagnetically-operated hydraulic valve and control auxiliary gear box, it is characterized in that the electromagnetically-operated hydraulic valve is connected with the control auxiliary gear box by transport pipe.
2. trac. f-w-d electricity liquid automatic control device according to claim 1, it is characterized in that the electromagnetically-operated hydraulic valve is by valve body, the electromagnetic wire winding, electromagnetic valve armature, slide bar, retracing spring, spool, valve pocket, oil pressure sensor, the spring orienting sleeve, the pressure limiting spring, bearing cap shim, limiting valve and oil inlet pipe union constitute, valve body branch upper and lower settings has electromagnetism valve pocket and pressure limiting valve pocket, by the electromagnetic wire winding, electromagnetic valve armature, slide bar, retracing spring, the electromagnetic valve that valve pocket and spool are formed is arranged on electromagnetism valve pocket left end, the right-hand member and the spool of slide bar join, retracing spring is arranged between electromagnetic valve armature and the slide bar, oil pressure sensor is arranged on the right-hand member of electromagnetism valve pocket, be arranged on the middle part of electromagnetism valve pocket with the oil outlet that joins of control auxiliary gear box, have fuel feed hole and fuel return hole on the hollow spool, also have fuel feed hole and fuel return hole on the valve pocket, fuel feed hole and fuel return hole communicate with the pressure limiting valve pocket through oil inlet passage and drainback passage respectively.
3. trac. f-w-d electricity liquid automatic control device according to claim 2, it is characterized in that oil inlet pipe union is arranged on the left end of pressure limiting valve pocket, the spring orienting sleeve is arranged on the right-hand member of pressure limiting valve pocket, the pressure limiting spool is arranged on the centre of pressure limiting valve pocket, the right-hand member of pressure limiting spring is positioned among the centre hole of spring orienting sleeve, the other end of pressure limiting spring is positioned among the centre hole of pressure limiting spool right-hand member, and the oil returning pipe joint that communicates with oil tank is arranged on the right-hand member of spring orienting sleeve.
4. trac. f-w-d electricity liquid automatic control device according to claim 1, it is characterized in that controlling auxiliary gear box is by transfer case housing, end cap, the auxiliary gear box output shaft, sealing shroud, bearing, output shaft location block plate, pull back spring, claw collar, final gear, driven gear and oil inlet pipe union are formed, the auxiliary gear box output shaft by bearing fixing among transfer case housing, the interior circle of claw collar is provided with spline and is meshed with spline on the auxiliary gear box output shaft cylindrical, the right-hand member of claw collar joins by moving tooth and final gear left end, the final gear outputting power that is meshed with driven gear, pull back spring is arranged between claw collar and the output shaft location block plate, sealing shroud is fixed on the left part of transfer case housing by end cap, oil inlet pipe union passes transfer case housing and joins with the fuel feed hole of opening on the cylindrical of sealing shroud, fuel feed hole on the sealing shroud joins with the oil transportation channel of opening in the middle of the auxiliary gear box output shaft, the right-hand member of oil transportation channel communicates with annular oil groove between the auxiliary gear box output shaft with opening in claw collar the circle right side, and the both sides of annular oil groove are provided with the compound seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01217000 CN2470177Y (en) | 2001-03-21 | 2001-03-21 | Electro-hydraulic automatic control apparatus for driving front wheel of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01217000 CN2470177Y (en) | 2001-03-21 | 2001-03-21 | Electro-hydraulic automatic control apparatus for driving front wheel of tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2470177Y true CN2470177Y (en) | 2002-01-09 |
Family
ID=33635309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01217000 Expired - Fee Related CN2470177Y (en) | 2001-03-21 | 2001-03-21 | Electro-hydraulic automatic control apparatus for driving front wheel of tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2470177Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103921834A (en) * | 2014-04-14 | 2014-07-16 | 洛阳映山红拖拉机有限公司 | Visible wireless remote-control system for controlling hydraulic steering and braking of wheel-type tractor |
-
2001
- 2001-03-21 CN CN 01217000 patent/CN2470177Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103921834A (en) * | 2014-04-14 | 2014-07-16 | 洛阳映山红拖拉机有限公司 | Visible wireless remote-control system for controlling hydraulic steering and braking of wheel-type tractor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |