AU2020100681B4 - A Hydraulic Control System For Trailer Ramp - Google Patents

A Hydraulic Control System For Trailer Ramp Download PDF

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Publication number
AU2020100681B4
AU2020100681B4 AU2020100681A AU2020100681A AU2020100681B4 AU 2020100681 B4 AU2020100681 B4 AU 2020100681B4 AU 2020100681 A AU2020100681 A AU 2020100681A AU 2020100681 A AU2020100681 A AU 2020100681A AU 2020100681 B4 AU2020100681 B4 AU 2020100681B4
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AU
Australia
Prior art keywords
valve
port
oil
hydraulic
reversing valve
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Active
Application number
AU2020100681A
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AU2020100681A4 (en
Inventor
Feng Shi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trailer Stonestar Pty Ltd
Original Assignee
Trailer Stonestar Pty Ltd
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Priority to AU2020100681A priority Critical patent/AU2020100681B4/en
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Publication of AU2020100681B4 publication Critical patent/AU2020100681B4/en
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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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/43—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using a loading ramp mounted on the vehicle
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/30515—Load holding valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/47—Flow control in one direction only
    • F15B2211/473—Flow control in one direction only without restriction in the reverse direction
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/783—Sequential control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
    • F15B2211/8636—Circuit failure, e.g. valve or hose failure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention relates to a trailer ramp hydraulic control system, belonging to the field of hydraulic control technology, includes the two hydraulic cylinders and balancing valve sets, reversing valves, oil pumps and oil tanks for supporting the ramp of the trailer. The two hydraulic cylinders are connected with port B of the reversing valve after having a stem cavity in series, and the rod-less cavities are connected with port A of the reversing valve after being connected in series through the balancing valve sets; the port P of the reversing valve is connected with the oil tank through the oil pump, and the port T is directly connected with the oil tank; a single balancing valve set is composed of a one-way valve and a liquid-controlled sequence valve, and the control port C of the liquid controlled sequence valve is connected with an oil circuit with the rod cavity of the hydraulic cylinder. This invention can solve the safety problem of lifting a trailer ramp.

Description

A Hydraulic Control System for Trailer Ramp
Technical field
The invention relates to a trailer ramp hydraulic control system, belonging to the
field of hydraulic control technology
Background technique
The function of hydraulic cylinder is to convert the pressure energy transferred
by fluid media into mechanical linear motion. It has the advantages of small volume
and compact structure, and has become one of the most common hydraulic actuator in
the hydraulic system. In some mechanical products, it is usually necessary to
synchronize the movement of the two hydraulic cylinders (that is, the piston moves in
the same time with the same stroke) to ensure the high quality of the whole product to
achieve the predetermined function. Taking the trailer ramp as an example, the
existing technology has the following defects: 1. The ramp can only be controlled to
the fully lowered or raised position, and cannot be arbitrarily adjusted to lower the
Angle, which makes it not convenient to use, especially when reversing, it need to
re-lift the ramp completely. 2. There is a hidden danger that the ramp may sliding
automatically, which may lead to accidents. 3. If there is a burst of hydraulic tubing,
the ramp will fall rapidly, causing severe accident. 4. The movement speed of the
ramp controlled by the traditional hydraulic device is not uniform, which is
inconvenient to use. Therefore, it is worth studying how to solve the safety problem of
lifting the large trailer ramp.
Summary of the invention
In view of this, the purpose of the invention is to provide a hydraulic control
system of trailer ramp, which can solve the safety problem of lifting large trailer
ramp.
In order to achieve the above object, the present invention provides the following
technical solutions:
The invention provides a trailer ramp hydraulic control system, includes the two
hydraulic cylinders and balancing valve sets, reversing valves, oil pumps and oil tanks
for supporting the ramp of the trailer. The two hydraulic cylinders are connected with
port B of the reversing valve after having a rod cavity in series, and the rod-less
cavities are connected with port A of the reversing valve after being connected in
series through the balancing valve sets; the port P of the reversing valve is connected
with the oil tank through the oil pump, and the port T is directly connected with the
oil tank; a single balancing valve set is composed of a one-way valve and a
liquid-controlled sequence valve, and the control port C of the liquid-controlled
sequence valve is connected with an oil circuit with the rod cavity of the hydraulic
cylinder.
Further, there are two throttle valves, respectively located on the oil road where
the two balancing valve sets are located.
Further, the throttle valve which described is a fixed throttle valve or an
adjustable throttle valve.
Further the described reversing valve is a three-position four-way solenoid valve.
The beneficial effects of the invention are:
This invention solved the safety problem of lifting a trailer ramp. it can also
make the trailer ramp lifting with uniform motion. And fix the ramp at any Angle.
The other advantages, objectives and characteristics of the invention will be explained to some extent in the subsequent specification, and to some extent, based on the investigation and study below, it will be obvious to the technicians in the field, or can be taught from the practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following specifications.
Description of the drawings
In order to make the objects, technical solutions and advantageous effects of the
present invention clearer, the present invention provides the following drawings for
explanation:
FIG. 1 is a structural schematic diagram of the invention;
FIG. 2 is another structural schematic diagram of the invention;
Attached drawing marks: hydraulic cylinder (1), balancing valve set (2), throttle
valve (3), reversing valve (4), oil pump (5), oil tank (6), one-way valve (21), liquid
control sequence valve (22).
Specific implementation case
The implementation method of the invention is illustrated as follows with
specific concrete examples. Technicians in the field can easily understand other
advantages and effects of the invention from the contents disclosed in the manual. The
invention can also be implemented or applied in different specific ways, and it can
also be modified or changed without deviation from the main content of the invention
based on different views and applications. In order to better illustrate the invention,
some parts in the attached drawings may be omitted, enlarged or shrunk, which does
not represent the size of the actual product.
Specific implementation 1:
As shown in FIG. 1, the hydraulic control system of the trailer ramp in this
implementation is used to realize the safety control of the two hydraulic cylinders of
the trailer, including the hydraulic cylinder (1), the balancing valve set (2), the
reversing valve (4), the oil pump (5) and the oil tank (6), which are used to support
the two diving boards of the trailer respectively. The two cylinders (1) have a rod
cavity in series, which connected with the port B of the reversing valve (4). The
rod-less cavity is connected with the port A of the reversing valve (4) through a
balancing valve set (2) in series. The inlet port P of the reversing valve (4) is
connected with the oil tank (6) through the oil pump (5), and the oil return port T is
directly connected with the oil tank (6). A single balancing valve set (2) is composed
of an one-way valve (21) and a liquid-controlled sequence valve (22), and the control
port C of the liquid-controlled sequence valve (22) is connected to the oil channel
with the rod cavity of the hydraulic cylinder (1).
Specifically, when reversing valve on the right side, the hydraulic oil that output
by oil pump will go through the reversing valve inlet port P and port A, respectively
into the one-way valve where on the left side of two balancing valve set, and then
enter the rod-less cavity of double hydraulic cylinder respectively, at the same time,
the hydraulic oil which inside of the rod cavity of double hydraulic cylinder go
through the reversing valve port B and flows into the oil tank by the oil return port T,
makes the hydraulic cylinder retraction and pack up the trailer ramp. In this process,
the liquid control sequence valve is closed. When the reversing valve is in the middle
position, the double hydraulic cylinder will stop working, and the trailer ramp will
also stop; while when the reversing valve turn to the left side, the hydraulic oil which
output by the pump will go through the port P and port B of the reversing valve,
respectively into the rod cavity of double hydraulic cylinder; at the same time, the
hydraulic oil will open the control port C of hydraulic control sequence valve, make
the rod-less cavity of double hydraulic cylinder can connect with the oil tank by the
port A and oil return port T of reversing valve, so as to make the hydraulic cylinder
extend and release the trailer ramp.
Based on the above technical scheme, the two balancing valve sets in this
hydraulic control system can control the rod-less cavity of two hydraulic cylinders
respectively, the two hydraulic cylinder can be synchronized lifting safely, make the
trailer ramp move in uniform motion, the ramp can also be placed at any angle.
Moreover, because of the role of the one-way valve, the risk of automatically slide of
the ramp can be avoided, and when there is a burst happened on hydraulic tubing, the
ramp will not fall rapidly, avoiding significant accident.
Specific implementation 2:
As shown in FIG. 2, the difference between this implementation and
implementation 1. is that the two throttle valves (3) are respectively located on the oil
circuit where the two balancing valve sets (2) are located. The throttle valve (3) is a
fixed throttle valve or adjustable throttle valve. Through the throttle valve design, it
can make the flow rate of hydraulic oil in hydraulic control sequence valve
consistently, further provide safety and uniform motion.
Finally, the above example to this invention only technical solution rather than
the limit, although with reference to the better implementation of cases of this
invention in detail, the common technology in the field of personnel should
understand that the technical scheme for this invention can be modified or equivalent
replacement, without of the purpose and scope of the technical scheme, above
situation shall be included in the range of the invention claims.

Claims (1)

  1. Claims
    7
    1, A trailer ramp hydraulic control system, includes two hydraulic cylinders (1)
    and balancing valve sets (2), reversing valves (4), oil pumps (5) and oil tanks (6) the
    features of trailer ramp hydraulic control system are: each hydraulic cylinder has a rod
    cavity and a rod-less cavity; reversing valve comprising ports B, A, P, T; the two
    hydraulic cylinders are connected in parallel;
    two rod cavities of the two hydraulic cylinders are connected in series with port
    B of the reversing valve, and two rod-less cavities of the hydraulic cylinders are
    connected with port A of the reversing valve after being connected in series through
    the balancing valve sets; the port P of the reversing valve is connected with the oil
    tank through the oil pump, and the port T is directly connected with the oil tank; a
    single balancing valve set is composed of a one-way valve (21) and a
    liquid-controlled sequence valve (22), and a control port C of the liquid-controlled
    sequence valve is connected with an oil circuit with the rod cavity of the hydraulic
    cylinder;
    it also includes two throttle valves (3), respectively located on the oil road where
    two balancing valve sets are located;
    when reversing valve on the right side, the hydraulic oil that output by oil pump
    will go through the reversing valve inlet port P and port A, respectively into the
    one-way valve where on the left side of two balancing valve set, and then enter the
    rod-less cavity of double hydraulic cylinder respectively, at the same time, the
    hydraulic oil which inside of the rod cavity of double hydraulic cylinder go through
    the reversing valve port B and flows into the oil tank by the oil return port T, makes
    the hydraulic cylinder retraction and pack up the trailer ramp. In this process, the
    liquid control sequence valve is closed;
    when the reversing valve is in the middle position, the double hydraulic cylinder
    will stop working, and the trailer ramp will also stop; while when the reversing valve
    turn to the left side, the hydraulic oil which output by the pump will go through the
    port P and port B of the reversing valve, respectively into the rod cavity of double
    hydraulic cylinder; at the same time, the hydraulic oil will open the control port C of
    Claims
    8 hydraulic control sequence valve, make the rod-less cavity of double hydraulic cylinder can connect with the oil tank by the port A and oil return port T of reversing valve, so as to make the hydraulic cylinder extend and release the trailer ramp.
    2, According to the hydraulic control system of trailer ramp described in claim 1, the characteristic is that the throttle valve is a fixed throttle valve or an adjustable throttle valve.
    3, According to the hydraulic control system of trailer ramp described in claim 1, the characteristic is that the reversing valve is a three-position four-way solenoid valve.
AU2020100681A 2020-05-04 2020-05-04 A Hydraulic Control System For Trailer Ramp Active AU2020100681B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2020100681A AU2020100681B4 (en) 2020-05-04 2020-05-04 A Hydraulic Control System For Trailer Ramp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2020100681A AU2020100681B4 (en) 2020-05-04 2020-05-04 A Hydraulic Control System For Trailer Ramp

Publications (2)

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AU2020100681A4 AU2020100681A4 (en) 2020-06-04
AU2020100681B4 true AU2020100681B4 (en) 2021-01-21

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4850787A (en) * 1985-12-06 1989-07-25 Kyokuto Kaihatsu Kogyo Co., Ltd. Cargo vehicle
JPH09286270A (en) * 1996-04-19 1997-11-04 Nozawa Seisakusho:Kk Haulage vehicle
US6176673B1 (en) * 1998-09-25 2001-01-23 Caterpillar Inc. Tailgate assembly having side mounted hydraulic cylinders
CN107020996A (en) * 2017-04-25 2017-08-08 华东交通大学 A kind of hydraulic telescopic type lorry back plate for handling goods

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4850787A (en) * 1985-12-06 1989-07-25 Kyokuto Kaihatsu Kogyo Co., Ltd. Cargo vehicle
JPH09286270A (en) * 1996-04-19 1997-11-04 Nozawa Seisakusho:Kk Haulage vehicle
US6176673B1 (en) * 1998-09-25 2001-01-23 Caterpillar Inc. Tailgate assembly having side mounted hydraulic cylinders
CN107020996A (en) * 2017-04-25 2017-08-08 华东交通大学 A kind of hydraulic telescopic type lorry back plate for handling goods

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