CN216742545U - Retarder unloading system controlled by electric pump and electromagnetic valve - Google Patents

Abstract

The utility model provides a retarder unloading system controlled by an electric pump and an electromagnetic valve, which relates to the technical field of vehicle retarders and comprises a retarder mechanical device, an unloading valve and an electric pump; the retarding mechanical device is provided with a high-pressure cavity and a low-pressure cavity; the unloading valve is provided with a piston loading cavity, the piston loading cavity is provided with a high pressure port, a low pressure port and a control port, the high pressure port is connected with the high pressure cavity through a high pressure branch, and the low pressure port is connected with the low pressure cavity; the electric pump is connected with the control port through a first pipeline, the electric pump can reduce the pressure of the piston loading cavity, the unloading valve is in an open state in a pressure reduction state, and the high-pressure port is communicated with the low-pressure port. The technical problem that the unloading reaction speed of the retarder is relatively low in the prior art is solved, the technical effects of rapid unloading reaction and accurate control are achieved, and the positive displacement pump principle can be applied to the retarder.

Description

Retarder unloading system controlled by electric pump and electromagnetic valve

Technical Field

The utility model relates to the technical field of vehicle retarders, in particular to a retarder unloading system controlled by an electric pump and an electromagnetic valve.

Background

Due to the fact that urban road intersections are multiple, bus stops are dense, passenger flow is large, and buses are frequently braked; the mountain roads are steep and have many sharp bends, and medium and large trucks and buses running on the mountain road section for a long time also need to be braked frequently.

Under the condition of long-time frequent work, the brake shoes are quickly worn, the service life of the brake friction plates is shortened, and the brake force is lost or the brake performance is greatly reduced due to the heat fading of the brake, so that the brake is one of the main causes of traffic accidents. Therefore, it is necessary to equip an auxiliary braking system.

The retarder is used as an auxiliary braking component of the vehicle, reduces the load of the braking system of the original vehicle by acting on the transmission system of the original vehicle, enables the vehicle to uniformly decelerate, improves the reliability of the braking system of the vehicle, prolongs the service life of the braking system, and can greatly reduce the use cost of the vehicle.

At present, the retarder mainly comprises an engine retarder, an eddy current retarder, a hydraulic retarder and the like. The eddy current retarder has the defects of large size, heavy weight of a machine body, high power consumption and the like; the hydraulic retarder at least has the defects of large volume, relatively low reaction speed, insufficient low-speed braking power, large no-load loss and the like, and the conventional hydraulic retarder adopts a stator-rotor mixed flow pump principle, and the principle can enable a displacement pump to be unloaded in a no-load mode, so that the no-load resistance is small, and the principle can be applied to the retarder by utilizing the displacement pump principle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a retarder unloading system controlled by an electric pump and an electromagnetic valve so as to solve the technical problem that the unloading reaction speed of a retarder is relatively slow in the prior art.

The utility model provides a retarder unloading system controlled by an electric pump and an electromagnetic valve, which comprises: a retarding mechanical device, an unloading valve and an electric pump;

the retarding mechanical device is provided with a high-pressure cavity and a low-pressure cavity;

the unloading valve is provided with a piston loading cavity, the piston loading cavity is provided with a high-pressure port, a low-pressure port and a control port, the high-pressure port is connected with the high-pressure cavity through a high-pressure branch, and the low-pressure port is connected with the low-pressure cavity;

the electric pump is connected with the control port through a first pipeline and can reduce the pressure of the piston loading cavity, the unloading valve is in an open state in the pressure reduction state, and the high-pressure port is communicated with the low-pressure port.

Further, the electric pump is connected with a reversing valve through a second pipeline;

the reversing valve is connected with the oil storage expansion cavity through a first reversing branch.

Further, the reversing valve is connected with the high-pressure branch through a second reversing branch;

the electric pump is connected with the oil storage expansion cavity through a third pipeline, and can draw the working medium in the high-pressure cavity and the working medium in the low-pressure cavity back to the oil storage expansion cavity through the second reversing branch, the reversing valve, the electric pump and the third pipeline.

Furthermore, a first electromagnetic valve is arranged on the third pipeline, and the first electromagnetic valve is communicated with the electric pump and the oil storage expansion cavity in a power-off state, and meanwhile, the high-pressure cavity is communicated with the atmosphere.

Furthermore, the first electromagnetic valve is a two-position three-way valve.

Further, the device also comprises an air branch;

one end of the air branch is connected with the first electromagnetic valve, and the other end of the air branch is connected with the high-pressure branch;

when the first electromagnetic valve is in a power-off state, the high-pressure cavity is communicated with the atmosphere through the air branch.

Further, a second electromagnetic valve is arranged on the air branch;

the second electromagnetic valve is provided with two connecting outlets, wherein one connecting outlet is connected with the high-pressure branch, and the other connecting outlet is used for connecting other branches.

Further, the unloading valve is arranged in a plurality, and the unloading valves are arranged in parallel.

Further, the electric pump is mounted on a housing of the retarding mechanism.

Has the beneficial effects that:

the electric pump is connected with the control port through the first pipeline, when the electric pump reduces the pressure of the piston loading cavity, the electric pump controls small current, the output flow of the electric pump is small, the pump pressure is also small, the unloading valve is in an open state, the high pressure port is communicated with the low pressure port, the high pressure port is connected with the high pressure cavity through the high pressure branch, the low pressure port is connected with the low pressure cavity, the communication between the high pressure cavity and the low pressure cavity can be realized, at the moment, the high pressure port is communicated with the low pressure port, pressure difference cannot be established, no working medium flows out, the torque is small, and unloading is realized by controlling small resistance. In the process, the retarder unloading system generates control pressure for controlling the piston loading cavity of the unloading valve through the electric pump, and the electric pump is rapid in response and accurate in control, so that the relatively rapid unloading response speed and accurate unloading can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a retarder unloading system controlled by an electric pump and a solenoid valve according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an unloading system of a retarder controlled by an electric pump and a solenoid valve in an oil pumping state according to an embodiment of the present invention, in which a solid line is a passage, a dotted line is a short circuit, and an arrow indicates an oil pumping path;

fig. 3 is a schematic diagram of an unloading system of a retarder controlled by an electric pump and a solenoid valve in an idle state according to an embodiment of the present invention, in which a solid line is a passage, a dotted line is a short circuit, and an arrow indicates an air flow path;

fig. 4 is a schematic structural diagram of an automobile retarder provided in an embodiment of the present invention.

An icon:

10-high voltage branch; 20-a first conduit; 30-a second conduit; 40-a first commutation branch; 50-a second commutation branch; 60-a third pipeline; 70-air branch; 80-oil storage expansion cavity;

100-a retarding mechanism; 110-a high pressure chamber; 120-low pressure chamber;

200-an unloading valve; 210-high pressure port; 220-low pressure port; 230-a control port; 240-oil storage cavity opening;

300-an electric pump;

400-a reversing valve;

500-a first solenoid valve;

600-second solenoid valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments and features of the embodiments described below can be combined with each other without conflict.

Referring to fig. 1, the present embodiment provides a retarder unloading system controlled by an electric pump and an electromagnetic valve, where the retarder unloading system includes a retarder mechanical device 100, an unloading valve 200, and an electric pump 300; the retarding mechanism 100 has a high pressure chamber 110 and a low pressure chamber 120; the unloading valve 200 is provided with a piston loading cavity, the piston loading cavity is provided with a high pressure port 210, a low pressure port 220 and a control port 230, the high pressure port 210 is connected with the high pressure cavity 110 through a high pressure branch 10, and the low pressure port 220 is connected with the low pressure cavity 120; the electric pump 300 is connected to the control port 230 through the first line 20, and the electric pump 300 can decompress the piston charge chamber, and in the decompressed state, the unloading valve 200 is in the open state, and the high pressure port 210 communicates with the low pressure port 220.

In the retarder unloading system controlled by the electric pump and the solenoid valve provided by this embodiment, when the electric pump 300 decompresses the piston loading cavity, the control current of the electric pump 300 is very small, the output flow of the electric pump 300 is very small, the pump pressure is also very small, the unloading valve 200 is in an open state, and the high pressure port is communicated with the low pressure port, because the high pressure port 210 is connected with the high pressure cavity 110 through the high pressure branch 10, and the low pressure port 220 is connected with the low pressure cavity 120, the communication between the high pressure cavity 110 and the low pressure cavity 120 can be realized, at this time, the high pressure port is communicated with the low pressure port, so that the pressure difference cannot be established, no working medium flows out, the torque brought is also very small, and the control is realized to make the resistance very small and unload. In the process, the retarder unloading system generates control pressure for controlling the piston loading cavity of the unloading valve 200 through the electric pump 300, and the electric pump 300 is rapid in response and accurate in control, so that the relatively rapid unloading response speed and accurate unloading can be realized.

It should be noted that the high pressure chamber 110 and the low pressure chamber 120 are generated by the operation of the speed reducing mechanism 100, the high pressure and the low pressure are relative terms, and the high pressure chamber 110 and the low pressure chamber 120 are conventional names in the art, which will be clear to those skilled in the art, and detailed descriptions are not provided herein for the specific structure of the speed reducing mechanism 100 and the specific forming manner of the high pressure chamber 110 and the low pressure chamber 120.

Specifically, the unloading valve 200 includes a valve body, a piston is arranged in the valve body, the piston divides a cavity in the valve body into a piston loading cavity and a piston unloading cavity, and the volumes of the piston loading cavity and the piston unloading cavity increase or decrease along with the movement of the piston, and further, an elastic member for returning the piston is arranged between the piston and the piston unloading cavity; alternatively, the elastic member may be a spring.

When the electric pump 300 decompresses the piston loading chamber, the electric pump 300 has a small control current, the output flow of the electric pump 300 is small, the pump pressure is also small, and the unloading valve 200 is in an open state under the return action of the elastic member.

In operation, since the electric pump 300 is connected to the control port 230 through the first pipeline 20, the electric pump 300 can build pressure on the unloading valve 200, specifically, in a pressurized state, the piston can move to the right to compress the elastic member, and the unloading valve 200 is closed, i.e., the high pressure port 210 is disconnected from the low pressure port 220; in a decompression state, the elastic element returns to move the piston to the left, and the unloading valve 200 is opened, namely the high pressure port 210 is communicated with the low pressure port 220.

In brief, with the electric pump 300, a control pressure for controlling the unloading valve 200 can be generated, and when the pressure acts on the left side of the piston, i.e., pressurization, the unloading valve 200 is closed; when there is no pressure on the left side of the piston, the piston returns under the action of the elastic member, that is, when the pressure is reduced, the unloading valve 200 is opened, and the speed-reducing mechanical device 100 cannot build up pressure any more, so that the braking torque cannot be generated, and the speed-reducing mechanical device 100 realizes unloading.

Further, the piston unloading chamber is provided with an oil storage chamber port 240, and the oil storage chamber port 240 is communicated with the oil storage expansion chamber 80 so as to meet the requirement that the pressure of the piston loading chamber is gradually increased, and when the piston is pushed to move to the right, the working medium in the piston unloading chamber is introduced into the oil storage expansion chamber 80.

Referring to fig. 1, the electric pump 300 is connected to a direction valve 400 through a second pipe 30; the direction valve 400 is connected to the oil storage expansion chamber 80 through the first direction branch 40.

The reversing valve has the characteristic of reversing, so that the working medium in the oil storage expansion cavity 80 can enter the piston unloading cavity of the unloading valve 200 through the first reversing branch 40, the reversing valve 400 and the electric pump 300 to close the unloading valve 200; conversely, the working medium in the piston unloading chamber of the unloading valve 200 can be made to enter the oil storage expansion chamber 80 through the electric pump 300, the second pipeline 30, the direction valve 400 and the first direction branch 40 to open the unloading valve 200.

Further, referring to fig. 1 and 2, the direction valve 400 is connected to the high pressure branch 10 through the second direction branch 50; the electric pump 300 is connected to the oil storage expansion chamber 80 through the third pipe line 60, and can pump the working medium in the high pressure chamber 110 and the low pressure chamber 120 back to the oil storage expansion chamber 80 through the second direction changing branch 50, the direction changing valve 400, the electric pump 300, and the third pipe line 60.

Since the high pressure chamber 110 and the low pressure chamber 120 of the retarding device 100 are filled with the working medium and have a certain idle resistance, the remaining working medium should be extracted, which may be called an oil-extracting state; specifically, the working medium in the high-pressure chamber 110 and the low-pressure chamber 120 can be pumped back to the oil storage expansion chamber 80 through the second direction changing branch 50, the direction changing valve 400, the electric pump 300 and the third pipeline 60, at this time, most of the working medium in the high-pressure chamber 110 and the low-pressure chamber 120 can be pumped out, and only part of the working medium is left for lubrication, so that the problem of large no-load resistance of the speed reducing mechanical device 100 can be solved, and the energy loss of the speed reducing mechanical device 100 during no-load can be minimized.

In brief, the pumping state is to pump out the excess working medium in the working chambers (the high pressure chamber 110 and the low pressure chamber 120) of the retarding mechanism 100 and leave a part of the working medium lubricated.

Referring to fig. 2, the third pipeline 60 is provided with a first solenoid valve 500, and the first solenoid valve 500 communicates the electric pump 300 with the oil storage expansion chamber 80 and communicates the high pressure chamber 110 with the atmosphere in a power-off state.

In the oil pumping state, the first electromagnetic valve 500 is powered off, the high-pressure cavity 110 (i.e. the working cavity oil inlet channel) of the retarding mechanical device 100 is communicated with the atmosphere, at this time, redundant working media in the working cavity can be discharged, and the rest part is used for lubrication; at this time, the electric pump 300 is still operated with a small pump volume, so that a small amount of oil can be output and sprayed to the oil inlet cavity of the working cavity through the small hole, and the effects of circulating lubrication and heat dissipation are started.

For example, the first solenoid valve 500 may be a two-position, three-way valve.

Further, referring to fig. 1 and 3, the retarder unloading system further includes an air branch 70; one end of the air branch 70 is connected with the first solenoid valve 500, and the other end is connected with the high-pressure branch 10; in the de-energized state of the first solenoid valve 500, the high pressure chamber 110 is vented to atmosphere through the air branch 70.

It should be noted that, the normal idle state of the retarder after the oil pumping state is the reverse state, and in the idle (or reverse) state, the reversing valve 400, the first electromagnetic valve 500 and the second electromagnetic valve 600 are all powered off, the electric pump 300 does not work, and the air branch 70 is communicated with the atmosphere to provide air for the working chamber. Referring to fig. 3, the air branch 70 is further provided with a second electromagnetic valve 600; the second solenoid valve 600 has two connection outlets, wherein one connection outlet is connected with the high-pressure branch 10, and the other connection outlet is used for connecting with other branches; and if the other branch circuit is not required to be connected, the other connecting outlet is closed.

For example, the second solenoid valve 600 may be a two-position, three-way valve.

On the basis of the above-described embodiments, the unloading valve 200 may be provided in one or more. When the unloading valve 200 is provided in plurality, the plurality of unloading valves 200 are provided in parallel.

Illustratively, when the unloader valves 200 are provided in two, the two unloader valves 200 are provided in parallel, and the piston-loading chambers of the unloader valves 200 are each connected to the high-pressure port 210 via the high-pressure branch 10, and the low-pressure port 220 is connected to the low-pressure chamber 120.

Referring to fig. 4, the present embodiment further provides an automobile retarder, including the retarder unloading system controlled by the electric pump and the solenoid valve according to the foregoing embodiment. The car retarder that this embodiment still provided includes the retarber off-load system through electric pump and solenoid valve control, and from this, the technical advantage and the effect that this car retarder can reach include the technical advantage and the effect that can reach through the retarber off-load system of electric pump and solenoid valve control equally, no longer gives unnecessary details here.

The electric pump 300 is mounted on the casing of the mechanical retarder 100, and can be modified according to the automobile layout requirement and disposed at other positions of the casing of the mechanical retarder 100.

Specifically, the electric pump 300 may be fastened to the casing of the speed reducing mechanism 100 by bolts, screws, or the like.

In summary, the retarder unloading system of the embodiment is mainly applied to an automobile retarder, and plays a role of unloading the retarding mechanical device 100 by controlling the electric pump 300, the reversing valve 400, the first electromagnetic valve 500 and the second electromagnetic valve 600 when the automobile does not need retarding.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The utility model provides a retarber off-load system through electric pump and solenoid valve control which characterized in that includes: a retarding mechanical device (100), an unloading valve (200) and an electric pump (300);

the retarding mechanism (100) has a high pressure chamber (110) and a low pressure chamber (120);

the unloading valve (200) is provided with a piston loading cavity, the piston loading cavity is provided with a high-pressure port (210), a low-pressure port (220) and a control port (230), the high-pressure port (210) is connected with the high-pressure cavity (110) through a high-pressure branch (10), and the low-pressure port (220) is connected with the low-pressure cavity (120);

the electric pump (300) is connected with the control port (230) through a first pipeline (20), the electric pump (300) can reduce the pressure of the piston loading cavity, the unloading valve (200) is in an open state in a pressure reduction state, and the high-pressure port (210) is communicated with the low-pressure port (220).

2. The system for unloading a retarder controlled by an electric pump and an electromagnetic valve according to claim 1, characterized in that the electric pump (300) is connected with a reversing valve (400) through a second pipeline (30);

the reversing valve (400) is connected with the oil storage expansion cavity (80) through a first reversing branch (40).

3. A retarder unloading system controlled by an electric pump and an electromagnetic valve according to claim 2, characterised in that the reversing valve (400) is connected to the high-pressure branch (10) by a second reversing branch (50);

the electric pump (300) is connected with an oil storage expansion cavity (80) through a third pipeline (60), and can draw the working medium in the high-pressure cavity (110) and the low-pressure cavity (120) back to the oil storage expansion cavity (80) through the second reversing branch (50), the reversing valve (400), the electric pump (300) and the third pipeline (60).

4. The system for unloading a retarder controlled by an electric pump and an electromagnetic valve according to claim 3, wherein a first electromagnetic valve (500) is disposed on the third pipeline (60), and the first electromagnetic valve (500) communicates the electric pump (300) with the oil storage expansion cavity (80) in a power-off state, and simultaneously communicates the high-pressure cavity (110) with the atmosphere.

5. A retarder unloading system controlled by an electric pump and an electromagnetic valve according to claim 4, characterized in that the first electromagnetic valve (500) is a two-position three-way valve.

6. A retarder unloading system controlled by an electric pump and a solenoid valve according to claim 4, further comprising an air branch (70);

one end of the air branch (70) is connected with the first electromagnetic valve (500), and the other end of the air branch is connected with the high-pressure branch (10);

when the first electromagnetic valve (500) is in a power-off state, the high-pressure cavity (110) is communicated with the atmosphere through the air branch (70).

7. The system for unloading a retarder controlled by an electric pump and an electromagnetic valve according to claim 6, wherein a second electromagnetic valve (600) is further disposed on the air branch (70);

the second solenoid valve (600) is provided with two connecting outlets, wherein one connecting outlet is connected with the high-pressure branch (10), and the other connecting outlet is used for connecting with other branches.

8. A retarder unloading system controlled by an electric pump and an electromagnetic valve according to any of claims 1-7, characterized in that the unloading valve (200) is arranged in plurality, and a plurality of unloading valves (200) are arranged in parallel.

9. The system for unloading a retarder controlled by an electric pump and a solenoid valve according to claim 8, wherein the electric pump (300) is mounted on a housing of the retarding mechanism device (100).

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