Hydraulic electronically controlled proportional brake valve

Abstract

The utility model relates to vehicle hydraulic braking control technical field discloses a kind of hydraulic electric control proportional brake valves, including horizontally placed cylindrical valve body;Valve body one side is equipped with oil tank interface assembly, the other side deep hole is equipped with tee pressure reducing valve assembly, longitudinal side is connected pressure reducing assembly through locating hole and bolt, and pressure reducing assembly contains proportional pressure reducing valve and first, second interface;Valve body upper surface one end is equipped with first, second pressure head, other end is equipped with two groups of interface assembly, respectively corresponding brake cylinder interface and pressure oil interface;Valve body lower surface is equipped with two groups of support seat with through hole, and oil tank interface assembly is built-in filter plate, and interface assembly contains insertion pipe, access head, filter screen and first sealing ring, tee pressure reducing valve assembly is connected through flange, and second sealing ring is equipped in sealing groove;The brake valve structure is compact, and through the sealing, filtering design and accurate connection of each component, guarantee the stability and reliability of brake control, applicable to proportional control scene of hydraulic braking system.

Description

Technical Field

[0001] This utility model relates to the field of vehicle hydraulic braking control technology, specifically a hydraulically controlled proportional brake valve. Background Technology

[0002] The hydraulic braking system is the core guarantee for vehicle driving safety, and the hydraulic electronic proportional brake valve, as a key control component of the system, directly determines the braking response speed, pressure control accuracy and system operation stability.

[0003] A search revealed existing technology (application number: CN201920999175.6), which describes "a hydraulic electronically controlled proportional brake valve." This utility model achieves basic braking control through the valve core structure in the valve body cavity combined with the oil circuit design. However, its component design lacks modular integration, the assembly process is cumbersome, and there is no dedicated filtration structure. Impurities in the hydraulic oil can easily enter the valve body. At the same time, the sealing structure is simple, and long-term use can easily lead to leakage, affecting the stability of the braking system. The pressure compensation response is lagging, making it difficult to accurately maintain the set pressure value, and its adaptability is limited.

[0004] Therefore, there is an urgent need for a hydraulically controlled proportional brake valve with a modular design to simplify assembly, a filtering and multiple sealing structure to ensure stability, and the ability to precisely regulate pressure and automatically compensate via current. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a hydraulically controlled proportional brake valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulically controlled proportional brake valve, comprising a valve body, the valve body being a horizontally placed cylinder, an oil tank interface assembly being provided on the horizontal side of the valve body, a deep hole being provided on the side of the valve body away from the oil tank interface assembly, and a three-way pressure reducing valve assembly being provided in the deep hole, a plurality of positioning holes being provided on the outer wall of the longitudinal side of the valve body, and a pressure reducing assembly being provided on the outside of the positioning holes, interfaces being provided at both ends of the upper side of the valve body near the positioning holes, and one end of a first pressure measuring head and a second pressure measuring head being threaded to the interfaces respectively, and a brake cylinder interface and a pressure oil interface being provided at both ends of the upper side of the valve body away from the first pressure measuring head and the second pressure measuring head, and interface assemblies being provided at the interfaces, with two sets of interface assemblies provided.

[0007] As a further description of the above technical solution:

[0008] The lower surface of the valve body is provided with a support seat. There are two sets of support seats, and the upper end of the support seat is connected to the outer wall of the lower surface of the valve body. Through holes are provided on both sides of the lower end of the support seat.

[0009] As a further description of the above technical solution:

[0010] The pressure reducing assembly includes a proportional pressure reducing valve. The longitudinal side of the proportional pressure reducing valve abuts against the outside of the positioning hole of the valve body, and a through hole is provided at the position corresponding to the positioning hole of the proportional pressure reducing valve. A bolt is provided in the proportional pressure reducing valve, and one end of the bolt passes through the through hole and is threaded to the positioning hole.

[0011] As a further description of the above technical solution:

[0012] The proportional pressure reducing valve is connected to the first interface at the end closest to the bolt and at the end furthest from the bolt. The proportional pressure reducing valve is connected to the second interface at the end closest to the oil tank interface assembly.

[0013] As a further description of the above technical solution:

[0014] The oil tank interface assembly includes an oil tank connector, one end of which extends into the interior of the valve body, and the outer wall of the end of the oil tank connector away from the valve body is provided with threads, and the inner wall of the end of the oil tank connector away from the valve body is connected to the outer wall of the filter plate.

[0015] As a further description of the above technical solution:

[0016] The interface assembly includes an extension tube, one end of which is connected to a brake cylinder interface and a pressure oil interface, and the end of the extension tube away from the interface is connected to one end of the access head via a flange. The outer wall of the end of the access head away from the extension tube is provided with threads. A filter screen is placed between the extension tube and the access head on opposite sides. A first sealing ring is provided on the outer side of the filter screen. The first sealing ring is placed in the groove between the extension tube and the first sealing ring.

[0017] As a further description of the above technical solution:

[0018] The three-way pressure reducing valve assembly includes a first pressure reducing connector, one end of which extends into the valve body, and a flange is provided on the outer wall of the end of the first pressure reducing connector away from the valve body. The end of the first pressure reducing connector away from the valve body abuts against one end of a second pressure reducing connector. A flange is provided on the outer wall of the end of the second pressure reducing connector near the sealing groove. The first pressure reducing connector, the sealing groove, and the valve body are connected by bolts. A sealing groove is provided on the opposite side of the first and second pressure reducing connectors, and a second sealing ring is placed inside the sealing groove.

[0019] This utility model has the following beneficial effects:

[0020] 1. Through modular component design and the setting of filter plates and screens, the assembly process is simplified and impurities are prevented from entering the valve body. Combined with multiple sealing structures, the long-term stable operation of the braking system is guaranteed.

[0021] Second, the automatic switching between parking, braking and driving states is achieved through current regulation. The pressure can be automatically compensated and maintained at the set value, with a rapid response, which is suitable for the proportional control requirements of hydraulic braking systems. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is an exploded view of the pressure-reducing component structure of this utility model;

[0024] Figure 3 This is an exploded view of the three-way pressure reducing valve assembly structure of this utility model;

[0025] Figure 4 This is an exploded view of the interface component structure of this utility model.

[0026] Legend:

[0027] 1. Valve body; 2. Support base; 3. Pressure reducing assembly; 4. Oil tank interface assembly; 5. First pressure measuring head; 6. Second pressure measuring head; 7. Interface assembly; 8. Three-way pressure reducing valve assembly; 301. Proportional pressure reducing valve; 302. Bolt; 303. First interface; 304. Second interface; 401. Oil tank connector; 402. Filter plate; 701. Insertion pipe; 702. First sealing ring; 703. Filter screen; 704. Connector; 801. First pressure reducing connector; 802. Sealing groove; 803. Second sealing ring; 804. Second pressure reducing connector. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Example 1:

[0032] like Figures 1 to 4 As shown, this embodiment provides a hydraulically controlled proportional brake valve, comprising: a valve body 1, which is a horizontally placed cylinder; an oil tank interface assembly 4 is provided on the horizontal side of the valve body 1; a deep hole is provided on the side of the valve body 1 away from the oil tank interface assembly 4, and a three-way pressure reducing valve assembly 8 is provided in the deep hole; multiple positioning holes are provided on the outer wall of the longitudinal side of the valve body 1, and a pressure reducing assembly 3 is provided on the outside of the positioning holes; interfaces are provided at both ends of the upper side of the valve body 1 near the positioning holes, and one end of the first pressure measuring head 5 and the second pressure measuring head 6 are respectively threaded to the interfaces; a brake cylinder interface and a pressure oil interface are provided at both ends of the upper side of the valve body 1 away from the first pressure measuring head 5 and the second pressure measuring head 6, and interface assemblies 7 are provided at the interfaces, with two sets of interface assemblies 7.

[0033] In this embodiment, the pressure reducing component 3, the oil tank interface component 4, the interface component 7, and the three-way pressure reducing valve component 8 constitute a hydraulically controlled proportional brake valve according to this application.

[0034] It should also be noted that the brake valve in this application can be a three-way brake valve, a straight-through brake valve, a pilot-operated brake valve, etc. Figure 1 In this embodiment, a three-way brake valve is used as an example for description. Of course, other types of brake valves can also adopt a similar structure, which will not be described in detail below.

[0035] Understandable, Figure 1 The diagram only schematically illustrates some of the components of the hydraulic electro-hydraulic proportional brake valve; the actual shape, size, location, and construction of these components are not subject to change. Figure 1 Due to limitations, hydraulically controlled proportional brake valves can also include, compared to... Figure 1 More or fewer parts.

[0036] Furthermore, in this embodiment, when no power is connected, the pressure oil interface to the brake cylinder interface is disconnected and the brake cylinder interface to the oil tank interface is connected to achieve parking brake. When the power is connected, the pressure oil interface to the brake cylinder interface is connected and the brake cylinder interface to the oil tank interface is disconnected to release the parking brake. Adjusting the current can realize the switching between braking and driving states. When the pressure is lower than the set value, the pressure oil interface automatically replenishes the pressure to the set value and maintains it, ensuring the accuracy of braking control.

[0037] Specifically, a support seat 2 is provided on the lower surface of the valve body 1. There are two sets of support seats 2, and the upper end of the support seat 2 is connected to the outer wall of the lower surface of the valve body 1. Through holes are provided on both sides of the lower end of the support seat 2.

[0038] In this embodiment, a carbon steel support seat 2 is installed on the lower surface of the valve body 1. The support seat 2 can be fixed inside the device through the through hole to achieve stable support for the valve body 1.

[0039] Example 2:

[0040] A pressure-reducing component 3 is provided based on embodiment 1.

[0041] Specifically, the pressure reducing assembly 3 includes a proportional pressure reducing valve 301. The longitudinal side of the proportional pressure reducing valve 301 abuts against the outside of the positioning hole of the valve body 1, and a through hole is provided at the position corresponding to the positioning hole of the proportional pressure reducing valve 301. A bolt 302 is provided in the proportional pressure reducing valve 301, and one end of the bolt 302 passes through the through hole and is threaded to the positioning hole.

[0042] As a preferred implementation method, the proportional pressure reducing valve 301 is firmly fixed to the valve body 1, ensuring the installation stability of the pressure reducing assembly 3.

[0043] Specifically, the proportional pressure reducing valve 301 is connected to one end of the first interface 303 at the side closest to the bolt 302 and the side furthest from the bolt 302 at the other end. The proportional pressure reducing valve 301 is connected to one end of the second interface 304 at the side closest to the oil tank interface assembly 4.

[0044] In this embodiment, the proportional pressure reducing valve 301 is precisely connected to the external oil circuit to ensure smooth hydraulic oil transmission.

[0045] Example 3:

[0046] Based on embodiment 2, an oil tank interface component 4 is provided.

[0047] Specifically, the oil tank interface assembly 4 includes an oil tank connector 401, one end of which extends into the interior of the valve body 1, and the outer wall of the end of the oil tank connector 401 away from the valve body 1 is provided with threads, and the inner wall of the end of the oil tank connector 401 away from the valve body 1 is connected to the outer wall of the filter plate 402.

[0048] With this configuration, the filter plate 402 blocks impurities in the hydraulic oil from entering the valve body 1, and the threaded structure ensures a stable connection between the oil tank connector 401 and the oil tank pipeline.

[0049] Specifically, the interface assembly 7 includes an insertion tube 701. One end of the insertion tube 701 is connected to the brake cylinder interface and the pressure oil interface respectively. The end of the insertion tube 701 away from the interface is connected to one end of the access head 704 through a flange. The outer wall of the end of the access head 704 away from the insertion tube 701 is provided with threads. A filter screen 703 is placed between the insertion tube 701 and the access head 704 on opposite sides. A first sealing ring 702 is provided on the outer side of the filter screen 703. The first sealing ring 702 is placed in the groove between the insertion tube 701 and the first sealing ring 702.

[0050] The filter screen 703 has a first sealing ring 702 made of nitrile rubber on its outer side. The filter screen 703 filters impurities for a second time, and the first sealing ring 702 enhances the sealing of the interface and prevents hydraulic oil leakage.

[0051] Specifically, the three-way pressure reducing valve assembly 8 includes a first pressure reducing connector 801, one end of which extends into the interior of the valve body 1, and a flange is provided on the outer wall of the end of the first pressure reducing connector 801 away from the valve body 1. The end of the first pressure reducing connector 801 away from the valve body 1 abuts against one end of the second pressure reducing connector 804. A flange is provided on the outer wall of the end of the second pressure reducing connector 804 near the sealing groove 802. The first pressure reducing connector 801, the sealing groove 802 and the valve body 1 are connected by bolts 302. A sealing groove 802 is provided on the opposite side of the first pressure reducing connector 801 and the second pressure reducing connector 804. A second sealing ring 803 is placed inside the sealing groove 802.

[0052] In this embodiment, a second sealing ring 803 made of nitrile rubber is placed inside the sealing groove 802. The second sealing ring 803 enhances the sealing performance of the three-way pressure reducing valve assembly 8. The flange and bolt 302 cooperate to achieve a firm connection of the assembly and ensure the stable operation of the pressure reducing oil circuit.

[0053] In actual use, firstly, install the interface assembly 7 to the pressure oil interface and the brake lever interface respectively. Then, connect the proportional pressure reducing valve 301 to the outer wall of the valve body 1 with bolts 302. Next, insert one end of the oil tank connector 401 in the oil tank interface assembly 4 into the interior of the valve body 1, and place the filter plate 402 inside the oil tank connector 401. Then, connect the oil tank pipe to the oil tank through the thread at one end of the oil tank connector 401. Then, insert one end of the first pressure reducing connector 801 into the interior of the valve body 1. Then, insert the second sealing ring 803 into the interior of the sealing groove 802. Then, abut the flange at one end of the second pressure reducing connector 804 against the flange at one end of the first pressure reducing connector 801. Then, the bolts 302 pass through the flange and connect to the side wall of the valve body 1. Finally, install the support base 2 inside the device through the through hole at the lower end of the support base 2.

[0054] When valve body 1 is in use, if no power is connected, the pressure oil interface to the brake cylinder interface is disconnected, and the brake cylinder interface to the oil tank interface is connected, and the vehicle is in parking brake mode. When power is connected, the pressure oil interface connects to the brake cylinder interface, and the brake cylinder interface to the oil tank interface is disconnected, and the vehicle is released from parking brake mode. When braking is required, the current connected to the power supply is reduced, and the oil in the brake cylinder overflows from the brake cylinder interface to the oil tank interface. At the same time, the pressure oil interface to the brake cylinder interface is closed. When the pressure in the brake cylinder interface is lower than the set pressure, the pressure oil interface automatically connects to the brake cylinder interface to supply pressure until the pressure reaches the set value and remains constant. When it is necessary to re-enter normal driving mode, the input current is increased, and the pressure output from the pressure oil interface to the brake cylinder interface increases, and the brake cylinder lowers or releases the brake, allowing the vehicle to drive normally.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulically controlled proportional brake valve, characterized in that: The valve body (1) is a horizontally placed cylindrical shape. A tank interface assembly (4) is provided on the horizontal side of the valve body (1). A deep hole is provided on the side of the valve body (1) away from the tank interface assembly (4), and a three-way pressure reducing valve assembly (8) is provided in the deep hole. Multiple positioning holes are provided on the outer wall of the longitudinal side of the valve body (1), and a pressure reducing assembly (3) is provided on the outside of the positioning holes. Interfaces are provided at both ends of the upper side of the valve body (1) near the positioning holes. The interfaces are threaded to one end of the first pressure measuring head (5) and the second pressure measuring head (6). Brake cylinder interface and pressure oil interface are provided at both ends of the upper side of the valve body (1) away from the first pressure measuring head (5) and the second pressure measuring head (6), and interface assemblies (7) are provided at the interfaces. Two sets of interface assemblies (7) are provided.

2. The hydraulically controlled proportional brake valve according to claim 1, characterized in that: The lower surface of the valve body (1) is provided with a support seat (2), and there are two sets of support seats (2). The upper end of the support seat (2) is connected to the outer wall of the lower surface of the valve body (1), and through holes are provided on both sides of the lower end of the support seat (2).

3. A hydraulically controlled proportional brake valve according to claim 2, characterized in that: The pressure reducing assembly (3) includes a proportional pressure reducing valve (301). The longitudinal side of the proportional pressure reducing valve (301) abuts against the outside of the positioning hole of the valve body (1). A through hole is provided at the position corresponding to the positioning hole of the proportional pressure reducing valve (301). A bolt (302) is provided in the proportional pressure reducing valve (301). One end of the bolt (302) passes through the through hole and is threaded to the positioning hole.

4. A hydraulically controlled proportional brake valve according to claim 3, characterized in that: The proportional pressure reducing valve (301) is located on the side near the bolt (302) and the end away from the bolt (302) is connected to one end of the first interface (303). The end of the proportional pressure reducing valve (301) near the oil tank interface assembly (4) is connected to one end of the second interface (304).

5. A hydraulically controlled proportional brake valve according to claim 4, characterized in that: The oil tank interface assembly (4) includes an oil tank connector (401), one end of which extends into the interior of the valve body (1), and the outer wall of the end of the oil tank connector (401) away from the valve body (1) is provided with threads, and the inner wall of the end of the oil tank connector (401) away from the valve body (1) is connected to the outer wall of the filter plate (402).

6. A hydraulically controlled proportional brake valve according to claim 5, characterized in that: The interface assembly (7) includes an insertion tube (701), one end of which is connected to the brake cylinder interface and the pressure oil interface respectively. The end of the insertion tube (701) away from the interface is connected to one end of the access head (704) through a flange. The outer wall of the end of the access head (704) away from the insertion tube (701) is provided with threads. A filter screen (703) is placed between the insertion tube (701) and the access head (704) on opposite sides. A first sealing ring (702) is provided on the outside of the filter screen (703). The first sealing ring (702) is placed in the groove between the insertion tube (701) and the first sealing ring (702).

7. A hydraulically controlled proportional brake valve according to claim 6, characterized in that: The three-way pressure reducing valve assembly (8) includes a first pressure reducing connector (801), one end of which extends into the interior of the valve body (1), and a flange is provided on the outer wall of the end of the first pressure reducing connector (801) away from the valve body (1). The end of the first pressure reducing connector (801) away from the valve body (1) abuts against one end of the second pressure reducing connector (804). A flange is provided on the outer wall of the end of the second pressure reducing connector (804) near the sealing groove (802). The first pressure reducing connector (801), the sealing groove (802) and the valve body (1) are connected by bolts (302). The first pressure reducing connector (801) and the second pressure reducing connector (804) are provided with a sealing groove (802) on opposite sides, and a second sealing ring (803) is placed inside the sealing groove (802).

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