Commercial vehicle abs solenoid valve

Abstract

This invention relates to a solenoid valve for ABS in commercial vehicles, comprising a lower housing, an upper housing, and a valve body assembly embedded between the lower and upper housings. The valve body assembly includes a valve shell with two sets of parallel through holes. Mounting guide sleeves are installed in the through holes, with the two sets of mounting guide sleeves arranged in opposite directions. A coil is positioned on the outer side of each mounting guide sleeve. A stationary iron core is positioned on one side of each mounting guide sleeve, forming a chamber between the stationary iron core and the mounting guide sleeve. A valve core is vertically mounted within this chamber. A central air passage is located at the center of each mounting guide sleeve, and two branch air passages communicating with the chamber are located on the outer side of the central air passage. A buffer chamber communicating with the chamber is provided within the mounting guide sleeve. An end cap capable of extending into the buffer chamber is integrally connected to one end of the valve core. This solenoid valve for ABS in commercial vehicles, by providing a buffer chamber and an end cap capable of extending into it, utilizes gas compression to generate damping during valve core movement, effectively reducing impact.

Description

Technical Field

[0001] This invention relates to the field of ABS solenoid valve technology, specifically to a commercial vehicle ABS solenoid valve. Background Technology

[0002] The ABS solenoid valve is a core actuator in the automotive anti-lock braking system (ABS). Its function is to prevent wheel lock-up during emergency braking by rapidly adjusting the brake hydraulic pressure, thereby maintaining the vehicle's steering ability and driving stability. In the commercial vehicle sector, due to the heavy vehicle load, high braking system pressure, and complex operating environment (such as frequent braking, high temperature, vibration, etc.), higher requirements are placed on the reliability, durability, and response speed of the ABS solenoid valve.

[0003] In the actual operation of ABS solenoid valves in commercial vehicles, the valve core, as a key moving component, directly affects the response speed, control accuracy, and service life of the entire braking system. Due to the complex and varied operating conditions of commercial vehicles, especially in scenarios such as frequent braking, continuous downhill driving, and high-load transportation, the ABS system needs to adjust the braking pressure frequently and quickly. This causes the valve core inside the solenoid valve to be in a state of frequent start-stop and high-speed reciprocating motion. Driven by electromagnetic force, the valve core accelerates, and its end speed is high. When it collides with the guide sleeve, the kinetic energy is instantly converted into impact force. This impact force not only acts on the valve core itself but also is transmitted to the stationary iron core, guide sleeve, and valve body structure. Long-term accumulation can easily lead to local plastic deformation or micro-cracks on the contact surface, damage to the sealing surface, gas leakage, and affect the overall service life of the solenoid valve. Therefore, a commercial vehicle ABS solenoid valve is proposed. Summary of the Invention

[0004] Based on the above description, the present invention provides a commercial vehicle ABS solenoid valve, which solves the technical problems pointed out in the background art.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a commercial vehicle ABS solenoid valve, comprising a lower housing, an upper housing, and a valve body assembly embedded between the lower housing and the upper housing; The valve body assembly includes a valve shell with two sets of parallel through holes. Mounting guide sleeves are installed in the through holes, and the two sets of mounting guide sleeves are arranged in opposite directions. A coil is installed on the outer side of the mounting guide sleeve. A stationary iron core is installed on one side of the mounting guide sleeve, forming a chamber between the stationary iron core and the mounting guide sleeve. A valve core is vertically mounted in the chamber. A central air passage is located at the center of the mounting guide sleeve, and two sets of branch air passages communicating with the chamber are located on the outer side of the central air passage. A buffer chamber communicating with the chamber is provided in the mounting guide sleeve. An end cap capable of extending into the buffer chamber is integrally connected to one end of the valve core.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the stationary iron core has a receiving port at one end near the valve core, and a mounting seat is provided in the receiving port. The mounting seat is hollow and forms an air passage. A connecting air passage is provided at the center of the stationary iron core, and the connecting air passage is connected to the first air passage. A spring is sleeved on the outside of the mounting seat and located between the mounting seat and the valve core.

[0008] Furthermore, the mounting base consists of a disc, an upper shaft, and a lower shaft, with the disc integrally connected between the upper and lower shafts, and the spring located between the disc and the valve core.

[0009] Furthermore, the end of the end away from the valve core is chamfered so that the end can extend into the buffer chamber.

[0010] Furthermore, the depth of the buffer chamber is greater than the height of the end.

[0011] Furthermore, the bottom of the valve body is provided with an I-shaped groove, and the lower housing is provided with an I-shaped slide rail. The valve body is installed on the outside of the I-shaped slide rail through the I-shaped groove.

[0012] Furthermore, a sealing gasket that fits against the surface of the valve body is provided on the outer side of the mounting guide sleeve. Multiple protruding sealing parts are integrally connected on the outer side of the sealing gasket. A groove that matches the protruding sealing parts is opened on the outer side of the valve body to form a high-low labyrinth seal.

[0013] Furthermore, the end of the stationary iron core away from the valve core is provided with an installation cavity, and a first sealing ring is provided in the installation cavity to form an end face seal.

[0014] Furthermore, annular grooves are provided on the outer sides of both the mounting guide sleeve and the stationary iron core, and a second sealing ring is fitted into the annular groove.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. The ABS solenoid valve for commercial vehicles, by setting a buffer chamber and an end that can be inserted into it, uses gas compression to generate damping when the valve core moves, effectively reducing the impact. A spring is installed between the mounting base and the valve core to provide mechanical buffering, forming a double buffering mechanism.

[0016] 2. The ABS solenoid valve for this commercial vehicle uses a gasket and a protruding sealing part to cooperate with the groove on the valve body to form a high-low labyrinth seal, which enhances the sealing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an ABS solenoid valve for commercial vehicles provided in an embodiment of the present invention; Figure 2 for Figure 1 Another structural diagram from another perspective; Figure 3 This is a schematic diagram of the connecting rod and its connection structure in an embodiment of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Lower housing; 2. Upper housing; 3. Valve body assembly; 31. Valve shell; 32. Mounting guide sleeve; 321. Central air passage; 322. Branch air passage; 323. Buffer chamber; 33. Static iron core; 331. Receiving port; 332. Mounting seat; 333. Spring; 34. Valve core; 341. End; 35. Sealing gasket; 36. Protruding sealing part; 37. Second sealing ring. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] like Figure 1-3 As shown, a commercial vehicle ABS solenoid valve in this embodiment includes a lower housing 1, an upper housing 2, and a valve body assembly 3 embedded between the lower housing 1 and the upper housing 2.

[0021] The valve body assembly 3 includes a valve housing 31, in which two sets of parallel through holes are provided. Mounting guide sleeves 32 are installed in the through holes, meaning there are two sets of mounting guide sleeves 32. It should be noted that the two sets of mounting guide sleeves 32 are arranged in opposite directions. A coil is provided on the outer side of each mounting guide sleeve 32. Additionally, a stationary iron core 33 is provided on one side of each mounting guide sleeve 32. Figure 3 From a perspective, the stationary iron core 33 on the left is located at the bottom of the left mounting guide sleeve 32, and the stationary iron core 33 on the right is located at the top of the right mounting guide sleeve 32. Furthermore, a cavity is formed between the stationary iron core 33 and the mounting guide sleeve 32, and a valve core 34 is installed in the cavity, which can be raised and lowered. The valve core 34 can also be understood as a moving iron core.

[0022] Since the valve core 34 needs to move up and down within the chamber, it is prone to directly impacting the mounting guide sleeve 32 and the stationary iron core 33 with considerable force during its movement. To mitigate the impact of the valve core 34, prevent premature damage to the valve core 34, mounting guide sleeve 32, and stationary iron core 33, and ensure the long-term normal operation of the commercial vehicle ABS solenoid valve, thus extending its service life, firstly, to mitigate the impact of the valve core 34 on the mounting guide sleeve 32, a central air passage 321 is provided at the center of the mounting guide sleeve 32. Two sets of air passages connected to the chamber are provided on the outer side of the central air passage 321. The air duct 322 is connected, and a buffer chamber 323 is provided in the mounting guide sleeve 32. The buffer chamber 323 is connected to the chamber and can contain the gas medium. That is, when there is a gas medium in the buffer chamber 323, it can play a buffering role. An end 341 that can extend into the buffer chamber 323 is integrally connected to one end of the valve core 34. The end of the end 341 away from the valve core 34 is provided with a chamfer so that the end 341 can extend into the buffer chamber 323. The depth of the buffer chamber 323 is greater than the height of the end 341.

[0023] Based on this design, as the end 341 continues to extend into the buffer chamber 323, the gas medium in the buffer chamber 323 is continuously compressed, which will generate resistance to reduce the impact of the end 341 and the valve core 34, and prevent the installation guide sleeve 32 and the valve core 34 from being damaged prematurely.

[0024] In addition, a receiving port 331 is provided at one end of the stationary iron core 33 near the valve core 34. A mounting seat 332 is provided in the receiving port 331. The mounting seat 332 is hollow and forms an air passage. It should also be noted that a connecting air passage is provided at the center of the stationary iron core 33. The connecting air passage is connected to the first air passage. A spring 333 is sleeved on the outside of the mounting seat 332 and located between the mounting seat 332 and the valve core 34. The spring 333 can provide a buffering effect. To further explain, the mounting seat 332 is composed of a disc, an upper shaft, and a lower shaft. The disc is integrally connected between the upper shaft and the lower shaft. The spring 333 is located between the disc and the valve core 34.

[0025] Based on this design, when the valve core 34 is close to the stationary iron core 33, and when the end 341 is close to the buffer chamber 323, the spring 333 can play a buffering role. The specific specifications of the spring 333 depend on the size of the solenoid valve used in the vehicle model, which will not be elaborated here.

[0026] The bottom of the valve housing 31 is provided with an I-shaped groove, and the lower housing 1 is provided with an I-shaped slide rail. The valve housing 31 is installed on the outside of the I-shaped slide rail through the I-shaped groove, which facilitates installation and restricts the front and back movement of the valve body assembly 3.

[0027] To enhance the seal, a sealing gasket 35 is provided on the outer side of the mounting guide sleeve 32, conforming to the surface of the valve housing 31. Multiple protruding sealing portions 36 are integrally connected to the outer side of the sealing gasket 35. A groove adapted to the protruding sealing portions 36 is formed on the outer side of the valve housing 31, creating a high-low labyrinth seal. Additionally, with... Figure 3 From a perspective, the end of the stationary iron core 33 away from the valve core 34 has an installation cavity, in which a first sealing ring is installed to form an end face seal.

[0028] In addition, annular grooves are provided on the outer sides of the mounting guide sleeve 32 and the stationary iron core 33, and second sealing rings 37 are fitted in the annular grooves. There are two sets of second sealing rings 37 between each mounting guide sleeve 32 and the valve housing 31, while there is one set of second sealing rings 37 between the stationary iron core 33 and the valve housing 31.

[0029] The following is a description of the ABS solenoid valve for this commercial vehicle: The valve body assembly 3 is slid into the I-beam slide rail of the lower housing 1 through the I-beam groove, and the upper housing 2 is covered and fixed by bolts or clips to form a complete valve body.

[0030] When the coil is energized, it generates a magnetic field that attracts the valve core 34 to move toward the stationary iron core 33. The end 341 gradually enters the buffer chamber 323, compressing the gas in the chamber to form an air cushion buffer. At the same time, the spring 333 is compressed to provide mechanical buffer. During the movement of the valve core 34, the gas flow path is controlled by the central air passage 321 and the branch air passage 322 in the guide sleeve 32 to achieve rapid adjustment of the braking pressure.

[0031] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A solenoid valve for ABS in commercial vehicles, characterized in that, It includes a lower housing (1), an upper housing (2), and a valve body assembly (3) embedded between the lower housing (1) and the upper housing (2); The valve body assembly (3) includes a valve shell (31). Two sets of parallel through holes are provided in the valve shell (31). A mounting guide sleeve (32) is provided in the through holes. The two sets of mounting guide sleeves (32) are arranged in opposite directions. A coil is provided on the outside of the mounting guide sleeve (32). A stationary iron core (33) is provided on one side of the mounting guide sleeve (32). A cavity is formed between the stationary iron core (33) and the mounting guide sleeve (32). A valve core (34) is provided in the cavity. A central air passage (321) is provided at the center of the mounting guide sleeve (32). Two sets of branch air passages (322) connected to the cavity are provided on the outside of the central air passage (321). A buffer cavity (323) connected to the cavity is provided in the mounting guide sleeve (32). An end (341) that can extend into the buffer cavity (323) is integrally connected to one end of the valve core (34).

2. The commercial vehicle ABS solenoid valve according to claim 1, characterized in that: The stationary iron core (33) has a receiving port (331) at one end near the valve core (34). A mounting seat (332) is provided in the receiving port (331). The mounting seat (332) is hollow and forms an air passage. A connecting air passage is provided at the center of the stationary iron core (33). The connecting air passage is connected to the air passage. A spring (333) is sleeved on the outside of the mounting seat (332) between the mounting seat (332) and the valve core (34).

3. The commercial vehicle ABS solenoid valve according to claim 2, characterized in that: The mounting base (332) consists of a disc, an upper shaft and a lower shaft. The disc is integrally connected between the upper shaft and the lower shaft, and the spring (333) is located between the disc and the valve core (34).

4. The commercial vehicle ABS solenoid valve according to claim 3, characterized in that: The end of the end (341) away from the valve core (34) is chamfered so that the end (341) can extend into the buffer chamber (323).

5. A commercial vehicle ABS solenoid valve according to claim 4, characterized in that: The depth of the buffer chamber (323) is greater than the height of the end (341).

6. A commercial vehicle ABS solenoid valve according to claim 5, characterized in that: The bottom of the valve body (31) is provided with an I-shaped groove, and the lower housing (1) is provided with an I-shaped slide rail. The valve body (31) is installed on the outside of the I-shaped slide rail through the I-shaped groove.

7. A commercial vehicle ABS solenoid valve according to any one of claims 1-6, characterized in that: The outer side of the mounting guide sleeve (32) is provided with a sealing gasket (35) that fits the surface of the valve body (31). Multiple protruding sealing parts (36) are integrally connected on the outer side of the sealing gasket (35). The outer side of the valve body (31) is provided with a groove that matches the protruding sealing parts (36) to form a high-low labyrinth seal.

8. A commercial vehicle ABS solenoid valve according to claim 7, characterized in that: The static iron core (33) has an installation cavity at the end away from the valve core (34), and a first sealing ring is provided in the installation cavity to form an end face seal.

9. A commercial vehicle ABS solenoid valve according to claim 8, characterized in that: The outer sides of the mounting guide sleeve (32) and the stationary iron core (33) are provided with annular grooves, and a second sealing ring (37) is fitted in the annular groove.

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