Hydraulic valve of new energy vehicle braking system

Abstract

This application relates to the field of automotive engineering technology and discloses a hydraulic valve for a new energy vehicle braking system, including a valve body. A first piston and a second piston are slidably connected inside the valve body, and a valve stem is fixedly connected to one end of the second piston. This hydraulic valve for a new energy vehicle braking system, through the cooperation of a connecting rod, connecting sleeve, slot, fixing block, and servo motor, allows an external controller to drive the servo motor to rotate the connecting sleeve when the first piston malfunctions. This causes the slot to precisely engage with the fixing block, achieving a rigid connection between the first and second pistons. The operator can directly drive the second piston via a pedal without applying excessive force, effectively avoiding a sharp increase in brake pedal force, brake response delay, and the risk of failure. Through overall synergistic action, the safety, reliability, and response efficiency of the new energy vehicle braking system are improved.

Description

Technical Field

[0001] This application relates to the field of automotive engineering technology, specifically a hydraulic valve for a new energy vehicle braking system. Background Technology

[0002] Currently, with the rapid development of new energy vehicles, the safety and reliability of their braking systems have become a core focus of the industry. Hydraulic valves in the braking system, as key control components, are directly responsible for regulating the pressure and flow direction of the brake fluid, thereby controlling the braking torque of the wheels. Existing technologies typically employ a dual-outlet, dual-piston design for hydraulic valves in braking systems. This design includes a primary piston and a secondary piston, with the two outlets corresponding to different braking circuits or wheels.

[0003] However, existing hydraulic valves with this dual-piston structure have certain limitations in practical use. Since the movement of the secondary piston depends on the pressure generated when the primary piston pushes it, when the primary piston malfunctions and cannot move normally, the secondary piston loses its power source. In this case, to continue pushing the secondary piston, a much greater pushing force than under normal operating conditions is required to make the primary piston fully contact the secondary piston before the secondary piston can move. This not only causes a sharp increase in brake pedal force, affecting the driving experience, but more seriously, the excessive pushing force demand may lead to delayed braking response or even brake failure, greatly reducing the braking safety of new energy vehicles. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a hydraulic valve for a new energy vehicle braking system. By setting up a connecting rod, connecting sleeve, slot, fixing block, and servo motor to cooperate with the valve, a rigid connection between the first piston and the second piston is achieved. The operator can directly drive the second piston through the pedal without applying excessive pushing force, effectively avoiding the risk of a sharp increase in brake pedal force, brake response delay, and failure, thus solving the problems mentioned in the background technology.

[0005] To achieve the above objectives, this application provides the following technical solution: a hydraulic valve for a new energy vehicle braking system, comprising a valve body, a first piston slidably connected inside the valve body, a second piston slidably connected inside the valve body, a valve stem fixedly connected to one end of the second piston, the valve stem being connected to an external pedal, a component cavity being formed on the inner side of the valve stem, a connecting rod fixedly connected to one end of the second piston, and the outer side of the connecting rod extending through the inner side of the first piston into the component cavity, a connecting sleeve rotatably connected inside the component cavity, the outer side of the component cavity being inserted into the inner side of the connecting sleeve, a movable groove being formed on the outer side of the connecting sleeve, a retaining groove being formed on the inner wall of the movable groove, a fixing block being fixedly connected to the outer side of the connecting rod, and the outer side of the fixing block being slidably connected to the inner wall of the movable groove, the fixing block and the retaining groove being engaged, a servo motor being fixedly connected to the inner wall of the component cavity, and the output end of the servo motor being fixedly connected to the outer side of the connecting sleeve, the servo motor being electrically connected to an external controller.

[0006] Through the above scheme, by utilizing the cooperation between the connecting rod, the slot, the fixing block 1, and the servo motor, when the first piston malfunctions and cannot move normally, the external controller can control the servo motor to drive the connecting sleeve to rotate, causing the slot to engage with the fixing block 1, thereby achieving a rigid connection between the first and second pistons. Afterwards, the operator can directly drive the second piston through the pedal without applying a much greater pushing force than under normal operating conditions, thus avoiding a sharp increase in brake pedal force, reducing the risk of brake response delay or failure, and improving the safety and reliability of the braking system of new energy vehicles.

[0007] Furthermore, an annular guide groove is provided on the inner side of the component cavity, and a fixing block two is fixedly connected to the outer side of the connecting sleeve, and the outer side of the fixing block two is slidably connected to the inner wall of the annular guide groove.

[0008] The above scheme utilizes the annular guide groove and the second fixing block to guide and limit the rotation of the connecting sleeve, preventing radial displacement of the connecting sleeve during rotation, ensuring precise engagement between the first fixing block and the slot, guaranteeing the stability of the connection structure between the first and second pistons, and thus ensuring the reliability of force transmission.

[0009] Furthermore, a retaining spring is fixedly installed on the outer side of both the first piston and the second piston. One end of the retaining spring in the first piston abuts against the outer side of the second piston, and one end of the retaining spring in the second piston abuts against the inner side of the valve body.

[0010] Through the above scheme, the retaining spring can provide a restoring force for the first piston and the second piston under normal working conditions, so that the two maintain a normal relative position relationship.

[0011] Furthermore, a piston seal is fixedly installed on the inner side of the valve body, and the outer side of the valve stem is slidably connected to the inner side of the piston seal.

[0012] The above solution utilizes a piston seal to seal the gap between the valve stem and the valve body, preventing hydraulic oil inside the valve body from leaking through this gap, ensuring stable pressure in the hydraulic system, ensuring effective transmission of hydraulic energy during braking, and avoiding impact on braking performance due to pressure loss.

[0013] Furthermore, a piston seal second is fixedly installed on the inner side of the first piston, and the outer side of the connecting rod is slidably connected to the inner side of the piston seal second.

[0014] The above solution utilizes the piston seal to seal the gap between the connecting rod and the first piston, preventing hydraulic oil leakage from affecting the transmission effect of the rigid connection.

[0015] Furthermore, sealing rings are fixedly embedded on the outer sides of both the first piston and the second piston, and the outer side of the sealing rings is in contact with the inner side of the valve body.

[0016] The above solution utilizes a sealing ring to enhance the sealing between the first and second pistons and the inner wall of the valve body, further preventing hydraulic oil from leaking between different chambers inside the valve body or to the outside, maintaining the pressure stability of the hydraulic system, and ensuring the accuracy of pressure regulation during braking.

[0017] Furthermore, two oil inlet pipes are fixedly installed on the upper side of the valve body, and a liquid storage tank is fixedly installed on the upper side of the two oil inlet pipes. A liquid inlet is opened on the inner side of each of the two oil inlet pipes, and a compensation port is opened on the inner side of each of the two oil inlet pipes.

[0018] Through the above scheme, the reservoir can replenish hydraulic oil into the valve body through the inlet to compensate for possible hydraulic oil loss in the system. Then, the compensation port can balance the pressure between the valve body and the reservoir, ensuring a stable supply of hydraulic oil as needed and improving the continuous working capability of the braking system.

[0019] Furthermore, two oil outlet pipes are fixedly installed on the outer side of the valve body, and a connecting pipe is fixedly installed on the inner side of each of the two oil outlet pipes, with the other end of the connecting pipe fixedly connected to the input end of the caliper.

[0020] Through the above scheme, the oil outlet pipe and the connecting pipe can accurately deliver the hydraulic oil regulated by the second piston in the valve body to the caliper, so that the hydraulic energy can be effectively converted into the braking force of the brake caliper, ensuring the response efficiency of the braking system.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects: This hydraulic valve for a new energy vehicle braking system, through the cooperation of a connecting rod, connecting sleeve, slot, fixing block 1, and servo motor, allows an external controller to drive the servo motor to rotate the connecting sleeve when the first piston fails. This causes the slot to precisely engage with the fixing block 1, achieving a rigid connection between the first and second pistons. The operator can directly drive the second piston via the pedal without applying excessive force, effectively avoiding a surge in brake pedal force, brake response delay, and the risk of failure. Simultaneously, the annular guide groove and fixing block 2 prevent radial displacement of the connecting sleeve, ensuring a precise and stable connection. Through this overall synergistic effect, the safety, reliability, and response efficiency of the new energy vehicle braking system are improved. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the entire application; Figure 2 This is a cross-sectional view of the overall structure of this application; Figure 3 This is a three-dimensional structural diagram of the first and second pistons of this application; Figure 4 This is a three-dimensional structural diagram of the second piston and connecting rod of this application; Figure 5 This is a connection structure diagram of the connecting rod and connecting sleeve of this application.

[0023] In the picture: 1. Valve body; 2. First piston; 3. Second piston; 4. Valve stem; 5. Connecting rod; 6. Component cavity; 7. Connecting sleeve; 8. Movable groove; 9. Slot; 10. Fixed block one; 11. Servo motor; 12. Fixed block two; 13. Annular guide groove; 14. Holding spring; 15. Piston seal one; 16. Piston seal two; 17. Sealing ring; 18. Oil inlet pipe; 19. Liquid reservoir; 20. Liquid inlet; 21. Compensation port; 22. Oil outlet pipe; 23. Connecting pipe. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Please see Figure 2 , Figure 4 and Figure 5This embodiment discloses a hydraulic valve for a new energy vehicle braking system, comprising a valve body 1. A first piston 2 and a second piston 3 are slidably connected inside the valve body 1. Holding springs 14 are fixedly mounted on the outer sides of both the first piston 2 and the second piston 3. One end of the holding spring 14 in the first piston 2 abuts against the outer side of the second piston 3, and one end of the holding spring 14 in the second piston 3 abuts against the inner side of the valve body 1. The holding springs 14 provide a restoring force to the first piston 2 and the second piston 3 under normal operating conditions, maintaining their normal relative position. A valve stem 4 is fixedly connected to one end of the second piston 3 and is connected to an external pedal. A component cavity 6 is formed on the inner side of the valve stem 4. A connecting rod 5 is fixedly connected to one end of the second piston 3, and the outer side of the connecting rod 5 extends through the inner side of the first piston 2 into the interior of the component cavity 6. The internal rotating part of component cavity 6 is connected to a connecting sleeve 7. The outer side of component cavity 6 is inserted into the inner side of connecting sleeve 7. The outer side of connecting sleeve 7 is provided with a movable groove 8. The inner wall of movable groove 8 is provided with a retaining groove 9. The outer side of connecting rod 5 is fixedly connected to a fixing block 10, and the outer side of fixing block 10 is slidably connected to the inner wall of movable groove 8. Fixing block 10 and retaining groove 9 are engaged. Utilizing the cooperation between connecting rod 5, retaining groove 9, fixing block 10 and servo motor 11, when the first piston 2 malfunctions and cannot move normally, the external controller can control servo motor 11 to drive connecting sleeve 7 to rotate, causing retaining groove 9 to engage with fixing block 10, thereby achieving a rigid connection between the first piston 2 and the second piston 3. The inner wall of component cavity 6 is fixedly connected to servo motor 11, and the output end of servo motor 11 is fixedly connected to the outer side of connecting sleeve 7. Servo motor 11 and external controller are electrically connected.

[0026] Please see Figure 2 and Figure 3The inner side of the component cavity 6 is provided with an annular guide groove 13. A fixing block 12 is fixedly connected to the outer side of the connecting sleeve 7, and the outer side of the fixing block 12 is slidably connected to the inner wall of the annular guide groove 13. The annular guide groove 13 and the fixing block 12 act as a guide and limiter for the rotation of the connecting sleeve 7, preventing radial displacement of the connecting sleeve 7 during rotation. This ensures precise engagement between the fixing block 10 and the slot 9, guaranteeing the stability of the connection structure between the first piston 2 and the second piston 3, and thus ensuring the reliability of force transmission. A piston seal 15 is fixedly installed on the inner side of the valve body 1. The outer side of the valve stem 4 is slidably connected to the inner side of the piston seal 15. The piston seal 15 seals the gap between the valve stem 4 and the valve body 1, preventing hydraulic oil inside the valve body 1 from leaking through this gap, thus ensuring the reliability of the hydraulic system. Stable pressure ensures effective transmission of hydraulic energy during braking and prevents pressure loss from affecting braking performance. A piston seal 16 is fixedly installed on the inner side of the first piston 2. The outer side of the connecting rod 5 is slidably connected to the inner side of the piston seal 16. The piston seal 16 can seal the gap between the connecting rod 5 and the first piston 2, preventing hydraulic oil leakage from affecting the transmission effect of the rigid connection. A sealing ring 17 is fixedly embedded on the outer side of both the first piston 2 and the second piston 3. The outer side of the sealing ring 17 is in contact with the inner side of the valve body 1. The sealing ring 17 can enhance the sealing between the first piston 2, the second piston 3 and the inner wall of the valve body 1, further preventing hydraulic oil from leaking between different chambers inside the valve body 1 or to the outside, maintaining the pressure stability of the hydraulic system and ensuring the accuracy of pressure regulation during braking.

[0027] Please see Figure 1 and Figure 2 Two oil inlet pipes 18 are fixedly installed on the upper side of the valve body 1. A reservoir 19 is fixedly installed on the upper side of the two oil inlet pipes 18. An inlet port 20 and a compensation port 21 are opened on the inner side of each of the two oil inlet pipes 18. The reservoir 19 can replenish hydraulic oil into the valve body 1 through the inlet port 20 to compensate for possible hydraulic oil loss in the system. Then, the compensation port 21 can balance the pressure between the valve body 1 and the reservoir 19, ensuring a stable supply of hydraulic oil as needed and improving the continuous working capacity of the braking system. Two oil outlet pipes 22 are fixedly installed on the outer side of the valve body 1. A connecting pipe 23 is fixedly installed on the inner side of each of the two oil outlet pipes 22, and the other end of the connecting pipe 23 is fixedly connected to the input end of the caliper. The oil outlet pipes 22 and the connecting pipe 23 can accurately deliver the hydraulic oil regulated by the second piston 3 in the valve body 1 to the caliper, so that the hydraulic energy can be effectively converted into the braking force of the brake caliper and ensure the response efficiency of the braking system.

[0028] The working principle of the above embodiment is as follows: Under normal circumstances, the reservoir 19 replenishes the hydraulic oil in the valve body 1 through the inlet 20 in the oil inlet pipe 18. At this time, the first piston 2 slides along the valve body 1 under the drive of the external pedal. The pressure generated by the movement of the first piston 2 and the hydraulic oil can directly push the second piston 3 to move. At this time, the fixing block 10 on the outside of the connecting rod 5 slides in the movable groove 8 of the connecting sleeve 7 and does not engage with the slot 9. The retaining spring 14 maintains the position of the two sets of pistons. The piston seal 15, piston seal 2 16, and sealing ring 17 can ensure that there is no leakage of hydraulic oil. The hydraulic oil after bidirectional adjustment by the first piston 2 and the second piston 3 is delivered to the caliper through the oil outlet pipe 22 and the connecting pipe 23 to complete the operation. Braking, then, when the first piston 2 malfunctions and cannot move, the external controller detects the abnormality and starts the servo motor 11, driving the connecting sleeve 7 to rotate. At this time, the second fixed block 12 slides along the annular guide groove 13 to ensure the stable rotation of the connecting sleeve 7. The rotation of the connecting sleeve 7 at this time can make the slot 9 in the movable groove 8 engage with the first fixed block 10, realizing the rigid connection between the first piston 2 and the second piston 3. After that, the external pedal can directly drive the second piston 3 without increasing the thrust to push it to move, ensuring that the hydraulic oil is normally delivered to the caliper and maintaining the stability of the braking function. When the fault is cleared, the servo motor 11 reverses to disengage the slot 9 from the first fixed block 10, and the retaining spring 14 pushes the piston to reset, restoring the normal working state.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic valve of a new energy vehicle braking system, comprising a valve body (1), characterized in that: A first piston (2) is slidably connected inside the valve body (1), and a second piston (3) is slidably connected inside the valve body (1). A valve stem (4) is fixedly connected to one end of the second piston (3). The valve stem (4) is connected to an external pedal. An assembly cavity (6) is opened on the inner side of the valve stem (4). A connecting rod (5) is fixedly connected to one end of the second piston (3), and the outer side of the connecting rod (5) extends through the inner side of the first piston (2) into the interior of the assembly cavity (6). A connecting sleeve (7) is rotatably connected inside the assembly cavity (6). The outer side of the assembly cavity (6) is inserted into... The inner side of the connecting sleeve (7) is provided with a movable groove (8) on the outer side of the connecting sleeve (7), and a slot (9) is provided on the inner wall of the movable groove (8). A fixing block (10) is fixedly connected to the outer side of the connecting rod (5), and the outer side of the fixing block (10) is slidably connected to the inner wall of the movable groove (8). The fixing block (10) and the slot (9) are engaged. A servo motor (11) is fixedly connected to the inner wall of the component cavity (6), and the output end of the servo motor (11) is fixedly connected to the outer side of the connecting sleeve (7). The servo motor (11) is electrically connected to the external controller.

2. The hydraulic valve for a new energy vehicle braking system according to claim 1, characterized in that: The inner side of the component cavity (6) is provided with an annular guide groove (13), and the outer side of the connecting sleeve (7) is fixedly connected with a fixing block two (12), and the outer side of the fixing block two (12) is slidably connected to the inner wall of the annular guide groove (13).

3. The hydraulic valve of the braking system of a new energy vehicle according to claim 1, characterized in that: A retaining spring (14) is fixedly installed on the outer side of both the first piston (2) and the second piston (3). One end of the retaining spring (14) in the first piston (2) abuts against the outer side of the second piston (3), and one end of the retaining spring (14) in the second piston (3) abuts against the inner side of the valve body (1).

4. The hydraulic valve of the new energy vehicle brake system according to claim 1, characterized in that: A piston seal (15) is fixedly installed on the inner side of the valve body (1), and the outer side of the valve stem (4) is slidably connected to the inner side of the piston seal (15).

5. The hydraulic valve of the new energy vehicle brake system according to claim 1, characterized in that: The inner side of the first piston (2) is fixedly installed with piston seal 2 (16), and the outer side of the connecting rod (5) is slidably connected to the inner side of piston seal 2 (16).

6. The hydraulic valve of the braking system of a new energy vehicle according to claim 1, characterized in that: Both the first piston (2) and the second piston (3) are fixedly inlaid with sealing rings (17), and the outer side of the sealing rings (17) is in contact with the inner side of the valve body (1).

7. The hydraulic valve of the new energy vehicle brake system according to claim 1, characterized in that: Two oil inlet pipes (18) are fixedly installed on the upper side of the valve body (1), and a liquid storage tank (19) is fixedly installed on the upper side of the two oil inlet pipes (18). An inlet port (20) is opened on the inner side of each of the two oil inlet pipes (18), and a compensation port (21) is opened on the inner side of each of the two oil inlet pipes (18).

8. The hydraulic valve of the braking system of a new energy vehicle according to claim 1, characterized in that: Two oil outlet pipes (22) are fixedly installed on the outer side of the valve body (1), and a connecting pipe (23) is fixedly installed on the inner side of each of the two oil outlet pipes (22), and the other end of the connecting pipe (23) is fixedly connected to the input end of the caliper.

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