Cabin control valve integrated with solenoid valve

A cabin control valve assembly for a vehicle includes a cabin control valve with at least one port P, and at least one solenoid direction control valve that is integrated with the cabin control valve at the at least one port P such that pressurised air that enters through an inlet port of the cabin control valve reaches an inlet of the at least one solenoid direction control valve. The at least one solenoid direction control valve is configured to allow, based on at least one signal indicative of at least one parameter related to the vehicle, delivery of pressurised air to a corresponding cylinder coupled to the cabin control valve assembly for operation of the cylinder.

FIELD OF INVENTION

The present invention relates to a cabin control valve for controlling hydraulic power tool. The present invention more particularly relates to a cabin control valve integrated with solenoid valve.

BACKGROUND OF INVENTION

Heavy power devices which output great work or are capable of moving heavy objects are commonly used in for example construction sites or steel workshops. Examples of the heavy power devices are rear-dump trucks and hydraulic crane tracks. To obtain a great power output, most of the heavy power devices are operated hydraulically. A hydraulic power system requires a pump to pressurize the hydraulic fluid and thus supply the high-pressure hydraulic fluid that is needed in operating the hydraulic power device. The pump may be driven by means of an electrical motor or an engine. The pump has to be turned on before the hydraulic power device is operated or the pump has to maintain continuous operation in order to supply the high-pressure hydraulic fluid. The pump has to be stopped once the supply of high-pressure hydraulic fluid is no longer needed and this may be done by means of for example a clutch or the like coupled between the pump and the motor/engine.

A regular hydraulically operated device, a controller is provided for the operator to control the supply of the high-pressure hydraulic fluid and the moving direction of the hydraulic device. Such a controller may be electrically or pneumatically operated. For certain hydraulic power devices, pneumatic power is more readily available for control purpose, such as a rear-dump truck which itself is equipped with an air compressor or similar device. In such a case, a pneumatic control assembly like cabin control valve used for controlling the hydraulic valve controlling the hydraulic cylinders in turn.

With conventional Cabin Control valve, driver of such truck is able to move the tipper up, down or hold in a particular position. Also, it is able to control the latching of the hydraulic pump with engine with a PTO (power take off) switch provided on Cabin control valve. Majorly all such Cabin Control valves are mechanical valve i.e. those need to operate by hand by driver as per need.

During the operation of tipping it is recommended not to start the operation of tipping if the vehicle is not on a flat and stable surface. In cases where truck is not standing on a flat area and it has a tilt more than +/−5 degrees then there are cases found where in such uneven surface when dumper or tipper is moved up the truck loses its grip and imbalances due to centre of gravity shifting up and results into many accidents of truck overturning. To avoid this, solenoid valve is put at the outlet of the “UP” Port of the cabin control valve. Here this port is pressurized with air when the driver moves the joystick of the cabin control valve in upward direction. In general condition this is directly connected to hydraulic valve which in turn supplies hydraulic pressure from hydraulic pump to hydraulic cylinder to move the tipper up but to add safety this additional solenoid valve is added in the circuit. Now this solenoid valve will be energized only when level sensor informs the ECU that truck is station on the flat land and conditions are right for tipping operation and thus ensuring safety. As now tipper will not move up unless trucks is on the surface having title within +/−5 degree.

Existing construction of cabin control valve includes cabin control valve wherein, 3/2 solenoid valve is connected through a pipe and attached with cabin control valve. Due to this sort of construction we have additional components adding up like pipes, fitting and mounting accessories for solenoid valve etc. These add into cost and also into failure modes. Also, drivers can tamper the system by bypassing the solenoid valve.

The present invention solves above problem by connecting solenoid valve directly said integrated to the cabin control valve for required application such as PTO [Power Take-off], Tipping, Downing operation, etc. Also, it covers all the possible requirement which may come in future for integrating solenoid valves of various types at various places through a modular concept. Example a human detection sensor can be place below tipper which will not allow tipper to come down unless tipper bottom is clear and in such case a valve controlling the output of “Down port” can be consider. Likewise, solenoid valve can be incorporated at inlet position which will control the air supply such as vehicle in the safe operable condition or supply can be cut off if air supply is insufficient And many other possibilities. Applicant faces a major problem is that users operate CCV for tipping or downing operation when truck is parked on slant surface which may damage vehicle or pneumatic/hydraulic system also. To solve problems applicant has invented cabin control valve which is integrated with solenoid direction control valve and attached with sensor.

SUMMARY OF THE INVENTION

The principal object of the present invention is to provide cabin control valve which is integrated with solenoid direction control valve wherein solenoid valve consisting of 3/2 solenoid valve, 5/2 solenoid valve, 4/2 solenoid valve, 2/2 solenoid valve, etc. Moreover, the present invention provides a cabin control valve which is integrated with 3/2 solenoid valve wherein solenoid direction control valve allows to enter pressurised air into cabin control valve and discharged previous air from cabin control valve.

One of the objects of the present invention is to provide cabin control valve wherein solenoid direction control valve which is connected at least one of the ports provided on to cabin control valve.

One of the objects of the present invention is to provide more than one ports such as PTO port, Up port, Down port, etc. as per requirements of the operations on which solenoid direction control valve is integrated.

One of the objects of the present invention is to provide a cabin control valve integrated with solenoid direction control valve and operated by said cabin control valve.

One of the objects of the present invention is to provide a cabin control valve wherein more than one solenoid direction control valve may integrate with the ports of said cabin control valve.

Another object of the present invention is to provide a cabin control valve wherein sensor detects position of loading platform as loading platform is at downward position or upward position and compare position of loading platform with parking position of vehicle as vehicle is parked at on slope or flat surface. If the vehicle is parked on slop surface then sensor prevents tipping operation.

One of the objects of the present invention is to provide a simple pneumatic or hydraulic circuit for operation of the cabin control valve.

One of the objects of the present invention is to provide efficiently cabin control valve system.

One of the objects of the present invention is to provide a cabin control valve integrated with solenoid valve which is easy to operate for untrained users.

DETAIL DESCRIPTION OF THE INVENTION

The present invention solves existing problems by providing solenoid valve directly said integrated to the cabin control valve for required application such as PTO [Power Take-off], Tipping, Downing operation.

The principal embodiment of the present invention is to provide cabin control valve which is integrated with solenoid valve wherein solenoid valve consisting of 3/2 solenoid valve, 5/2 solenoid valve, 4/2 solenoid valve, 2/2 solenoid valve, etc. More than one solenoid direction control valve is configured partially within cabin control valve. The word “Partially” is disclosed herein as the solenoid direction control valve is integrated with cabin control valve.

One of the embodiments of the present invention is to provide cabin control valve wherein solenoid valve is connected at least one of the ports provided on to cabin control valve.

One of the embodiments of the present invention is to provide more than one ports such as PTO port, Up port, Down port, etc. as per requirements of the operations.

One of the embodiments of the present invention is to provide a cabin control valve integrated with solenoid valve and operated by said solenoid valve.

One of the embodiments of the present invention is to provide a cabin control valve wherein more than one solenoid valve may integrate with said cabin control valve.

One of the embodiments of the present invention is to provide a simple pneumatic or hydraulic circuit for operation of the cabin control valve.

One of the embodiments of the present invention is to provide efficiently cabin control valve system.

One of the embodiments of the present invention is to provide a cabin control valve integrated with solenoid valve which is easy to operate for untrained users.

Another embodiment of the present invention is to provide a cabin control valve wherein sensor is connected with cabin control valve which detects position of loading platform like loading platform is at downward position or upward position and compare position of loading platform with parking position of vehicle as vehicle is parked at on slope or flat surface. Moreover, if vehicle is at slope and driver gives command for upward position to loading platform then sensor does not proceed driver's command as a vehicle is on slop.

The present invention does not limit its scope by providing only 3/2 solenoid valve, it can be 5/2 solenoid valve, 4/2 solenoid valve, 2/2 solenoid valve, etc. Moreover, the present invention provides a cabin control valve integrated with solenoid valve which is for pneumatic system and also for hydraulic system.

FIG.1of the present invention illustrate cabin control valve assembly100that comprises a cabin control valve20and a 3/2 solenoid valve10integrated with the cabin control valve20, wherein lever30allows user to select the operation that are Neutral, PTO off, Up and Down by changing the position of said lever30. Lever30is arranged on cabin control valve20. Cabin control valve consisting of more than one ports for different operation such as for neutral condition, to PTO ON or OFF1, to up the cylinder of said tipping2, to down the cylinder of said lowering3, inlet port04for air, etc. as per requirement. There are other ports said P1, P2, P3. . . Pn are the ports located on to cabin control valve20on which solenoid direction control valve10can be attached. Solenoid direction control valve can be 3/2, 5/2, 4/2 solenoid valve. Push button40is for engage or disengage the PTO. Up position of the push button40engages the hydraulic pump with engine RPM through clutch and down position disengage the same.

FIG.2of the present invention discloses ports available on cabin control valve20wherein more than one ports P for different operation such as for normal condition, to PTO 1, to up cylinder said tipping2, to down cylinder said lowering3, inlet port04for air, etc as per requirement. P1, P2, P3. . . Pn are the ports located on to cabin control valve20on which solenoid direction control valve10can be attached.

FIG.3of the present invention discloses perspective view of cabin control valve integrated with 3/2 solenoid valve10from bottom wherein 3/2 solenoid valve10integrated at any ports P available on to cabin control valve20. The present invention does not limit its scope by integrating only 3/2 solenoid valve but it can be 5/2, 4/2, etc as per application.

FIG.4of the present invention discloses 3/2 solenoid valve10and ports P available on cabin control valve wherein Ports P1, P2and P3is used to integrate 3/2 solenoid valve10into it.3/2solenoid valve10is integrated at least one of said ports P1, P2and P3. Ports1,2,3and4are for different operation such as PTO, Tipping and lowering. Moreover, said cabin control valve20comprises ports P which consist of more than one ports i.e. P1, P2, P3. . . Pn=P. value of no. of ports can be varied as per requirement. Said ports P used to integrate only solenoid direction control valve.

FIG.5of the present invention discloses 3/2 solenoid valve10integrated with cabin control valve20for particular operation, wherein 3/2 solenoid valve is connected at least one port P of cabin control valve20as per requirement. Examples are shown inFIG.5wherein 3/2 solenoid valve10may be connected to port P1for PTO; 3/2 solenoid valve10may be connected to port P2for tipping or said solenoid valve may be connected with port P3for lowering operation. 3/2 solenoid valve10is connected to any port P [P1, P2, P3. . . Pn] as per different operations such as PTO, tipping, lowering, etc.

FIG.6of the present invention discloses 3/2 solenoid valve10integrated with cabin control valve20wherein more than one 3/2 solenoid valves10can be connected to the ports P provided on the cabin control valve20for different operations.FIG.6Adiscloses one cabin control valve10is connected to the one port P2of the cabin control valve20; same asFIG.6Bshows two 3/2 solenoid valves10are connected to the ports P said P1and P2of the cabin control valve20. AndFIG.6Cshows three 3/2 solenoid valves10are connected to the ports P said P1, P2and P3of the cabin control valve20. Further, an embodiment of the present invention is to provide a cabin control valve20wherein multiple solenoid direction control valve can be attached to all ports or some of the ports as per requirements.

FIG.7of the present invention discloses de-energised condition of 3/2 solenoid valve10integrated with cabin control valve20wherein air enters into 3/2 solenoid valve10through inlet50of the solenoid valve10. At the time of de-energised condition, the 3/2 solenoid valve10prevents entry of air into cabin control valve20. At the same time, the previous pressurised air from the cabin control valve20escape to the atmosphere from exhaust port60of 3/2 solenoid valve10.

FIG.8of the present invention discloses energised condition of 3/2 solenoid valve integrated with cabin control valve20wherein air enters into cabin control valve20via 3/2 solenoid valve10from the inlet50to operate cabin control valve. During energised period exhaust port60remains close.

FIG.9of the present invention disclose 3/2 solenoid valve10integrated with cabin control valve20allows pressurised air to enter into all cylinders so user can operate the lever and control the cabin control valve20as per requirement.

FIG.10of the present invention discloses a pneumatic circuit diagram of the cabin control valve assembly100that integrates a 3/2 solenoid valve10wherein cabin control valve2011301exhaust port70of cabin control valve20, PTO port01, tipping port02, lowering port03, inlet port04of the cabin control valve20, inlet50of 3/2 solenoid valve10, exhaust port60of solenoid valve10and 3/2 solenoid valve10. An embodiment of the present invention is to provide solenoid direction control valve which is integrated with cabin control valve wherein pressurised air enters into cabin control valve20from inlet port04of the cabin control valve20to which inlet50of the 3/2 solenoid valve10is connected. Pressurised air enters into solenoid valve by means of inlet50. Further, position of lever30varies as per required operation. For an example, if the position of level30is at tipping operation then pressurised air enters from inlet port04of the cabin control valve and reaches solenoid valve. The solenoid valve10integrated at port P2shall allow said pressurised air to the port02for tipping operation and allows to discharge previous pressurised air via exhaust port60. Same way for different operation 3/2 solenoid valve will be integrated to ports P of the cabin control valve.