Integrated proportional control pneumatic system for hydraulic retarder

Abstract

The utility model provides an integrated proportional control pneumatic system for a hydrodynamic retarder, which is used for solving the problems that the existing proportional control pneumatic system with a split structure has many risk points due to the fact that a contact pin is spot-welded on an injection molding connector and is connected with a controller through a corresponding wire harness, and the cost is low. And certain control delay exists. According to the integrated proportional control pneumatic system for the hydraulic retarder, the controller is electrically connected with the electromagnet through the proportional valve connector with the pin connectors arranged at the upper end and the lower end, the control accuracy is greatly improved, the purpose that one hydraulic retarder serves as a strategy can be better achieved, and accurate pressure regulation of the whole system is achieved; and meanwhile, the proportional valve connector is used for replacing a wire harness and an injection molding connector, so that the system problem caused by the failure of the wire harness is avoided, the hidden dangers that dust, impurities and water vapor enter the system and the like caused by the failure of the injection molding connector are avoided, and the operation cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hydraulic retarder, especially relates to an integrated proportional regulating pneumatic system for hydraulic retarder. BACKGROUND

[0002] At present, the control mode of the hydraulic retarder is mainly that the air source of the whole vehicle is proportioned on demand through an air inlet actuating mechanism, so that the movement of the medium in the hydraulic retarder generates corresponding braking force. At present, the air inlet actuating mechanism is usually realized by valve-related products, and most of the valve products adopt a proportional regulation control mode, that is, the air inlet process of the whole system can be accurately regulated according to the established control strategy through a mechanical structure. This stepless continuous adjustable working mode makes the hydraulic retarder almost cover all use conditions.

[0003] With the development of the Chinese automobile industry, the requirements for the hydraulic retarder, which is an integrated product of machine, electricity, gas and liquid, are also increasing, such as saving space and realizing higher precision control. At present, the control of the valve-related structure of the hydraulic retarder in the industry is of a split structure, such as a large-flow direct-acting pneumatic proportional pressure control valve disclosed in Chinese patent CN117267418A and a hydraulic retarder control valve disclosed in Chinese patent CN110017382A. Since the proportional regulating pneumatic system of the split structure usually has a pin spot-welded on an injection connector, and is connected to a controller through a corresponding wire harness, this invisibly increases many risk points. Specifically, if any of the controller or the connector end wire harness fails, it will affect the function of the whole pneumatic system; at the same time, when the injection connector is damaged due to external factors, dust impurities, water vapor and the like are easily introduced into the system, accelerating the failure of the assembly, so that high-dustproof and waterproof components are usually required, greatly increasing the cost. In addition, the proportional regulating pneumatic system of the split structure also has a certain control delay and cannot be accurately controlled to "one strategy for one machine". UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the technical problems that the proportional regulating pneumatic system of the split structure has many risk points and a certain control delay due to the pin spot-welded on the injection connector and connected to the controller through the corresponding wire harness, and provides an integrated proportional regulating pneumatic system for hydraulic retarder.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows:

[0006] The utility model relates to an integrated proportional adjusting pneumatic system for hydraulic retarder, including valve body, set up in the solenoid of valve body, pressure regulating module and air inlet gas path, the pressure regulating module includes proportional valve spool, valve spool spring, connecting valve and fast discharge valve, the valve body is provided with valve spool installation cavity, proportional valve spool and valve spool spring are coaxial from inside to outside and are installed in valve spool installation cavity, the valve body is provided with first cavity with outside hydraulic retarder cavity body intercommunication near one end of frame, and fast discharge valve is set up in first cavity, connecting valve is set up in the position of first cavity and connects valve spool installation cavity, the solenoid is coaxial and located proportional valve spool's left side, its special feature is that, the valve body upper end is provided with proportional valve connector in the position of solenoid,

[0007] The upper and lower ends of the proportional valve connector are provided with pin interfaces, the upper pin interface is used for electrically connecting with an external controller, and the lower pin interface is electrically connected with the solenoid; both the pin interfaces are made of conductive material and are electrically connected with each other; the proportional valve connector is sealingly connected with the valve body.

[0008] An air inlet is arranged on the upper end of the valve body near the side of the fast discharge valve; one end of the air inlet gas path is connected with the air inlet, and the other end extends to the position of the proportional valve spool and is in communication with an air inlet of the valve spool.

[0009] A pressure relief exhaust passage is arranged in the valve body, one end of the pressure relief exhaust passage is in communication with the space between the solenoid and the proportional valve spool, and the other end is in communication with an exhaust passage of the fast discharge valve.

[0010] Further, a third cavity is arranged axially on the valve body of the fast discharge valve, a safety valve is arranged in the third cavity, one end of the third cavity is in communication with the first cavity, and the other end is in communication with an exhaust passage arranged on the fast discharge valve.

[0011] The opening preset pressure value of the safety valve is equal to the preset safety pressure value of the first cavity.

[0012] Further, the air inlet is a VOSS quick plug interface.

[0013] Further, the proportional valve spool has a double-ring support structure.

[0014] Further, the proportional valve connector and the valve body are sealingly connected through a rubber sealing ring.

[0015] Further, the connecting valve is made of rubber.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. The utility model provides a kind of integrated proportional regulating pneumatic system for hydraulic retarder, proportional valve connector is achieved by being provided with pin interface in upper and lower ends, and the electrical connection of controller and electromagnet is realized, the accuracy of control is greatly improved, "one strategy" can be better realized, so that the entire system realizes accurate pressure regulating;Meanwhile, the utility model uses proportional valve connector to replace wire harness and injection molding connector, not only avoid the system problem caused by wire harness failure, but also avoid the hidden danger such as dust impurities and moisture entering the system caused by injection molding connector failure, effectively reduce operating cost.

[0018] 2, the utility model provides a kind of integrated proportional regulating pneumatic system for hydraulic retarder, by being provided with the exhaust passage of quick exhaust valve communication pressure relief exhaust passage, the excess gas between electromagnet and proportional valve spool is led out to the exhaust passage of quick exhaust valve by pressure relief exhaust passage, and the gas to be discharged in the exhaust passage of quick exhaust valve is discharged outside valve body, effectively avoid the risk such as corrosion in system caused by moisture backflow phenomenon.

[0019] 3, compared to proportional regulating pneumatic system of prior art, only the air inlet of gas source can be arranged at the front end of proportional valve spool, so that it is far away from the vehicle frame, and the vibration amplitude of vehicle during driving is large, leading to high system failure, the utility model sets air inlet body on the upper end of valve body close to one side of quick exhaust valve, so that air inlet is closer to the frame, not only effectively solve the failure problem of system, make system response more quickly, control more accurately, but also facilitate the arrangement of vehicle end wire harness.

[0020] 4, the integrated structure of electromagnet, proportional valve spool and quick exhaust valve sharing one valve body can leave more redundant space for the arrangement of external controller, and assembly is more convenient, product is more light.

[0021] 5, compared to the independent design form of traditional safety valve and quick exhaust valve, the utility model integrates safety valve on quick exhaust valve, realizes module integration under the premise of ensuring quick exhaust and overpressure prevention function, small in size and easy to install;Meanwhile, the quick exhaust valve of this structure can be assembled from single direction together with electromagnet, proportional valve spool and the like. DRAWINGS

[0022] Figure 1 It is the structure schematic view of the utility model a kind of integrated proportional regulating pneumatic system for hydraulic retarder embodiment;

[0023] Figure 2 It is the longitudinal section view of the utility model a kind of integrated proportional regulating pneumatic system for hydraulic retarder embodiment along electromagnet and proportional valve spool;

[0024] Figure 3The utility model discloses a longitudinal section view along proportional valve connector of integrated proportional regulation pneumatic system for hydraulic retarder

[0025] Figure 4 The utility model discloses a longitudinal section view along air inlet gas path of integrated proportional regulation pneumatic system for hydraulic retarder

[0026] Figure 5 The utility model discloses bottom section view of integrated proportional regulation pneumatic system for hydraulic retarder embodiment.

[0027] Specific reference signs are as follows:

[0028] 1-valve body;2-magnet;3-proportional valve spool;4-spool spring;5-connection valve;6-fast discharge valve;7-safety valve;8-first cavity;9-second cavity;10-proportional valve connector;11-gas source air inlet;12-air inlet gas path;13-spool air inlet;14-pressure relief exhaust passage;15-exhaust passage;16-fast discharge valve air inlet hole. Specific implementation

[0029] In order to make the utility model's advantage and feature more clearly, following combining with the specific embodiment of drawing to the utility model makes further detailed explanation.

[0030] As Figure 1 , Figure 2 Shown, an integrated proportional regulation pneumatic system for hydraulic retarder, including valve body 1, set up in valve body 1's magnet 2, pressure regulating module and air inlet gas path 12.

[0031] Pressure regulating module includes proportional valve spool 3, spool spring 4, connection valve 5 and fast discharge valve 6.

[0032] Proportional valve spool 3 is the core functional component of entire pneumatic system, and preferably, the proportional valve spool 3 of double ring support structure is used in this embodiment.Valve body 1 is provided with spool mounting cavity, and proportional valve spool 3 and spool spring 4 are coaxially installed in the spool mounting cavity from inside to outside.

[0033] The first cavity 8 is set up in valve body 1 close to the end of the frame, and the fast discharge valve 6 is set up in the first cavity 8, and the fast discharge valve air inlet hole 16 is set up on the side wall of valve body 1 corresponding to the position of the first cavity 8.The connection valve 5 is coaxially arranged in the first cavity 8 and is connected to the position of the spool mounting cavity, so that the second cavity 9 is formed between the proportional valve spool 3 and the connection valve 5.Valve body 1 is provided with a communication hole communicated between the first cavity 8 and the external hydraulic retarder cavity, for making the gas in the first cavity 8 enter the hydraulic retarder cavity through the communication hole.

[0034] As Figure 3As shown, the electromagnet 2 is coaxially located on the left side of the proportional valve spool 3, and the upper end of the valve body 1 is provided with a proportional valve connector 10 corresponding to the position of the electromagnet 2, both upper and lower ends of the proportional valve connector 10 are provided with pin interfaces, the pin interface at the upper end is used for electrical connection with the external controller, and the pin interface at the lower end is electrically connected with the electromagnet 2. The pin interfaces at the upper and lower ends of the proportional valve connector 10 are both conductive materials, and the two pin interfaces are electrically connected; the proportional valve connector 10 is provided in the pin type structure, which can realize electrical connection between the external controller and the electromagnet 2 through the pin interfaces at the upper and lower ends of the proportional valve connector 10, so that the external controller controls the electromagnet 2 in the valve body 1 to work, and the fixed connection between the valve body 1 and the external controller can be further strengthened. At the same time, the position where the proportional valve connector 10 is connected with the valve body 1 is sealed and connected by using a rubber sealing ring, so that the air tightness of the electromagnet 2 part is fully guaranteed while realizing conduction.

[0035] As shown, the electromagnet 2 is coaxially located on the left side of the proportional valve spool 3, and the upper end of the valve body 1 is provided with a proportional valve connector 10 corresponding to the position of the electromagnet 2, both upper and lower ends of the proportional valve connector 10 are provided with pin interfaces, the pin interface at the upper end is used for electrical connection with the external controller, and the pin interface at the lower end is electrically connected with the electromagnet 2. The pin interfaces at the upper and lower ends of the proportional valve connector 10 are both conductive materials, and the two pin interfaces are electrically connected; the proportional valve connector 10 is provided in the pin type structure, which can realize electrical connection between the external controller and the electromagnet 2 through the pin interfaces at the upper and lower ends of the proportional valve connector 10, so that the external controller controls the electromagnet 2 in the valve body 1 to work, and the fixed connection between the valve body 1 and the external controller can be further strengthened. At the same time, the position where the proportional valve connector 10 is connected with the valve body 1 is sealed and connected by using a rubber sealing ring, so that the air tightness of the electromagnet 2 part is fully guaranteed while realizing conduction. Figure 4

[0036] In the working process, some gas will be generated in the space between the electromagnet 2 and the proportional valve spool 3, in order to discharge the gas outside the valve body 1, the existing proportional pneumatic system directly opens a pressure relief exhaust hole from the space between the electromagnet 2 and the proportional valve spool 3 to the outside of the valve body 1, and the gas is directly discharged outside the valve body 1 through the pressure relief exhaust hole. However, the vehicle is prone to water vapor backflow phenomenon in the pressure relief exhaust hole during driving, thereby causing the risk of rust inside the system. In order to solve this problem, as shown in the drawings, the utility model discloses a pressure relief exhaust channel 14 in the valve body 1, one end of the pressure relief exhaust channel 14 is communicated with the space between the electromagnet 2 and the proportional valve spool 3, and the other end is communicated with the exhaust channel 15 of the quick exhaust valve 6, so that the residual gas between the proportional valve spool 3 and the electromagnet 2 can be introduced to the exhaust channel 15 of the quick exhaust valve 6 through the pressure relief exhaust channel 14, and discharged outside the valve body 1 together with the gas to be discharged in the exhaust channel 15 of the quick exhaust valve 6. Figure 5

[0037] ​​The third cavity is axially arranged on the valve body of the quick exhaust valve 6, a safety valve 7 is arranged in the third cavity, one end of the third cavity is communicated with the first cavity 8, and the other end is communicated with an exhaust passage 15 of the quick exhaust valve 6, so that the whole system can be quickly exhausted. The opening preset pressure value of the safety valve 7 is equal to the preset safety pressure value of the first cavity 8, and when the system pressure is unbalanced, the excess gas can be quickly exhausted outside the valve body 1 through the safety valve 7, so that the system is balanced. Meanwhile, the safety valve 7 is integrated on the quick exhaust valve 6 in the utility model, compared with the independent design form of the traditional safety valve 7 and the quick exhaust valve 6, the integrated structure can leave more redundant space for the arrangement of other parts of the whole system. The quick exhaust valve 6 designed in the utility model can be assembled from a single direction together with the electromagnet 2 and the pressure regulating module, and the assembly is more convenient and the product is more light.

[0038] The integrated proportional regulating pneumatic system of the utility model realizes the electrical connection of the controller and the electromagnet 2 through the design of the proportional valve connector 10 provided with the pin interface at the upper and lower ends, and redesigns the pressure relief exhaust passage 14 and the inlet gas path 12, so that the whole system can realize accurate pressure regulation while effectively reducing the cost and avoiding potential hidden troubles, and the specific working process is as follows:

[0039] The inlet process: when the integrated proportional regulating pneumatic system needs to intervene in work, the external controller transmits the electrical signal to the electromagnet 2 through the proportional valve connector 10, the electromagnet 2 is electrified and stressed, the push rod of the electromagnet 2 overcomes the force of the valve core spring 4, extrudes the proportional valve core 3 to the right, so that the whole vehicle gas source (the gas of the inlet gas path 12) enters the proportional valve core 3 through the valve core inlet 13, and then flows to the second cavity 9; at the same time, the connecting valve 5 is pushed to the right under the pressure difference between the second cavity 9 and the first cavity 8, at this time, the exhaust passage 15 of the quick exhaust valve 6 is blocked, the gas enters the first cavity 8 through the gap between the connecting valve 5 and the side wall of the first cavity 8, and then enters the hydraulic retarder cavity through the communication hole.

[0040] The exhaust process: the current output by the external controller gradually decreases, the force balance of the electromagnet 2 is broken, the left side pressure of the connecting valve 5 is less than the pressure of the hydraulic retarder cavity, the connecting valve 5 moves to the left, at this time, the gas entering the hydraulic retarder cavity through the communication hole, along the gap between the connecting valve 5 and the quick exhaust valve 6, is exhausted through the exhaust passage 15 of the quick exhaust valve 6; at the same time, the residual gas between the proportional valve core 3 and the electromagnet 2 is connected through the pressure relief exhaust passage 14 and the exhaust passage 15 of the quick exhaust valve 6, and the excess gas is exhausted.

[0041] The pressure protection: when the inlet pressure of the integrated proportional regulating pneumatic system exceeds the safety pressure set by the safety valve 7, the safety valve 7 is pushed to the right and opens, and the excess pressure is exhausted, when the pressure returns to normal, the safety valve 7 is reset under the action of the spring force, and the whole pneumatic system returns to normal.

[0042] The above is only used to illustrate the technical solutions of the present application, and is not intended to limit them. For ordinary skilled persons in the art, the specific technical solutions described in the above embodiments can be modified, or some technical features can be replaced equivalently, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions protected by the present application.

Claims

1. An integrated proportional regulating pneumatic system for hydraulic retarder, comprising a valve body (1), an electromagnet (2) arranged in the valve body (1), a pressure regulating module, and an air inlet air path (12); the pressure regulating module comprises a proportional valve spool (3), a spool spring (4), a connecting valve (5) and a quick exhaust valve (6); the valve body (1) is provided with a spool mounting cavity, the proportional valve spool (3) and the spool spring (4) are coaxially arranged in the spool mounting cavity from inside to outside; the valve body (1) is provided with a first cavity (8) at one end close to the vehicle frame, which is in communication with the external hydraulic retarder cavity, and the quick exhaust valve (6) is arranged in the first cavity (8); the connecting valve (5) is arranged in the first cavity (8) at the position connecting the spool mounting cavity; the electromagnet (2) is coaxially arranged on the left side of the proportional valve spool (3). Characterized in that: a proportional valve connector (10) is arranged on the upper end of the valve body (1) corresponding to the position of the electromagnet (2); both upper and lower ends of the proportional valve connector (10) are provided with pin interfaces, the upper end pin interface is used for electrical connection with the external controller, and the lower end pin interface is electrically connected with the electromagnet (2); both pin interfaces are made of conductive material and are electrically connected; the proportional valve connector (10) is sealingly connected with the valve body (1); an air source inlet (11) is arranged on the upper end of the valve body (1) close to one side of the quick exhaust valve (6); one end of the air inlet air path (12) is connected with the air source inlet (11), and the other end extends to the position of the proportional valve spool (3) and is in communication with a spool air inlet (13); a pressure relief exhaust passage (14) is arranged in the valve body (1), one end of the pressure relief exhaust passage (14) is in communication with the space between the electromagnet (2) and the proportional valve spool (3), and the other end is in communication with an exhaust passage (15) arranged on the quick exhaust valve (6).

2. The integrated proportional regulating pneumatic system for hydraulic retarder according to claim 1, characterized in that: an axial third cavity is arranged on the valve body of the quick exhaust valve (6), a safety valve (7) is arranged in the third cavity, one end of the third cavity is in communication with the first cavity (8), and the other end is in communication with the exhaust passage (15) of the quick exhaust valve (6); the opening preset pressure value of the safety valve (7) is equal to the preset safety pressure value of the first cavity (8).

3. The integrated proportional regulating pneumatic system for hydraulic retarder according to claim 2, characterized in that: the air source inlet (11) is a VOSS quick plug interface.

4. The integrated proportional regulating pneumatic system for hydraulic retarder according to claim 3, characterized in that: the proportional valve spool (3) is a double-ring support structure.

5. The integrated proportional regulating pneumatic system for hydraulic retarder according to claim 4, characterized in that: the proportional valve connector (10) and the valve body (1) are sealingly connected through a rubber sealing ring.

6. The integrated proportional regulating pneumatic system for hydraulic retarder according to claim 4, characterized in that: the connecting valve (5) is made of rubber.

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