GB790542A - Improvements in or relating to differential gears - Google Patents
Improvements in or relating to differential gearsInfo
- Publication number
- GB790542A GB790542A GB1513653A GB1513653A GB790542A GB 790542 A GB790542 A GB 790542A GB 1513653 A GB1513653 A GB 1513653A GB 1513653 A GB1513653 A GB 1513653A GB 790542 A GB790542 A GB 790542A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- lever
- clutch
- servo
- controlled
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/04—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for differential gearing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Abstract
790,542. Controlling differential gearing. MASSEY - HARRIS - FERGUSON (GREAT BRITAIN), Ltd., [formerly MASSEY-HARRIS - FERGUSON (MANUFACTURING, Ltd.]. June 1, 1954 [June 1, 1953], No. 15136/53. Class 80 (2). In an agricultural tractor with an hydraulic power lift for a hitched implement controlled by a hand lever and a differential transmission gear lockable by a friction clutch engaged by an hydraulic servomotor controlled by a valve, an operative connection between the valve and the power lift is such that when the hand lever is positioned to lift the implement the valve is operated to disengage the clutch and the valve is also operated automatically, to disengage the clutch in the event of certain eventualities during the operation of the tractor. Manual means may also be provided for varying the clutch pressure. In Fig. 1, the power lift servomotor is controlled by the hand lever 12 and an overload-release device includes a rod 20 loaded by a reaction spring 21. The pressure in the clutch servo 3 is controlled by a relief valve 5, the loading spring 7A of which is controlled by an adjustable lever 8. The lever 12 has a one-way connection 11 with the stem 10 of valve 5 so that, when lever 12 is moved into vertical position to energize the lifting servo, valve 5 is opened to cause disengagement of the clutch. Similarly, on the occurrence of a predetermined overload, rod 20 acts on stem 10 through linkage 13, 14, 15, 28 to open valve 5. The latter may also be opened upon a predetermined steering movement in either direction or by application of a brake to either driving-wheel, or by movement of the hitch links. In the constructional form shown in Fig. 3, the lever 8, normally retained in adjusted position by a spring-loaded detent 46, acts on valve 5 through a torsion-spring 7A and a lever 44, lever 12 co-operates with collar 11 on stem 10 through linkage 51, 52, while rods 49, 50, actuated by the over-load-release device and by either brake pedal, act on the other arm 44A of lever 44. In modifications, a separate exhaust valve is arranged in the hydraulic circuit for operation mechanically, electrically or hydraulically by the overload-release device or by steering or braking. In the arrangement shown in Fig. 8, a single pump 100 supplies both the lift servo 104 and, through piping 107 controlled by two piston valves 109, 110 in series and operated by a manual lever 112, the clutch servo 3. With lever 112 in vertical position, both valves 109, 110 are open. The clutch is therefore engaged, so long as pump 100 is delivering or so long as there is sufficient pressure in the system due to the weight of the implement. If lever 112 is moved anticlockwise, valve 110 is not moved but valve 109 is lowered to shut off supply to servo 3 and relieve the latter through a discharge passage 111, so disengaging the clutch. Valve 109 is also shut off when the ram of servo 104 moves to lift the implement. Anti-clockwise movement of lever 112 from the vertical position has no effect on valve 109 but lowers valve 110 first to bring into circuit a spring-loaded relief valve 121 and then to open a discharge passage 122. A rod 123, operated by the overload-release device or by steering or braking, also serves to lower valve 110. Specification 687,341 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1513653A GB790542A (en) | 1953-06-01 | 1953-06-01 | Improvements in or relating to differential gears |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1513653A GB790542A (en) | 1953-06-01 | 1953-06-01 | Improvements in or relating to differential gears |
Publications (1)
Publication Number | Publication Date |
---|---|
GB790542A true GB790542A (en) | 1958-02-12 |
Family
ID=10053676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1513653A Expired GB790542A (en) | 1953-06-01 | 1953-06-01 | Improvements in or relating to differential gears |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB790542A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1213263B (en) * | 1962-02-27 | 1966-03-24 | Tractor Res Ltd Abbotswood | Device for actuating the lock of the differential gear for tractors |
-
1953
- 1953-06-01 GB GB1513653A patent/GB790542A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1213263B (en) * | 1962-02-27 | 1966-03-24 | Tractor Res Ltd Abbotswood | Device for actuating the lock of the differential gear for tractors |
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