A valve ball type pilot valve

Abstract

The present invention relates to the field of pilot valve technology and discloses a ball-type pilot valve, comprising a coil assembly, an electromagnet assembly, and a main valve sleeve assembly. The coil assembly and the main valve sleeve assembly are respectively assembled at opposite ends of the electromagnet assembly. The main valve sleeve assembly comprises a main valve sleeve, a pilot valve sleeve, a pilot valve core, a spring seat, and a valve ball. The pilot valve sleeve is fixedly disposed within the main valve sleeve, with the pilot valve core gap fitting within the main valve sleeve. The main valve sleeve is positioned between the electromagnet assembly and the pilot valve sleeve. A pilot spring is disposed between the pilot valve core and the pilot valve sleeve. The spring seat is fixed to the end of the pilot valve sleeve away from the pilot valve core. A valve ball groove is formed between the spring seat and the pilot valve sleeve, with the valve ball gap fitting within the groove. A valve ball spring is disposed between the valve ball and the pilot valve sleeve. A first shutoff surface is formed between the pilot valve core and the pilot valve sleeve, and a second shutoff surface is formed between the pilot valve core and the main valve sleeve. The flow rate is gradually regulated, and a sealing effect is excellent. The processing difficulty is low, and mass production is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of pilot valves, in particular to a valve ball type pilot valve. Background Art

[0002] Shock absorbers are a crucial component of vehicle suspension systems, primarily responsible for damping vibrations caused by road bumps. Using internal fluid and pores, shock absorbers absorb the spring's vibrational energy, converting it into heat and releasing it. This eliminates the vehicle's adverse energy, providing a more comfortable experience for passengers and improved safety. This is particularly beneficial for protecting batteries and other components in new energy vehicles. Traditional shock absorbers have only fixed damping characteristics and lack real-time control. However, the use of pilot solenoid valves can enhance damping characteristics, creating an adjustable damping field and improving vehicle comfort and safety. Currently, solenoid valves, due to their unique structure, have limited assembly and product consistency, necessitating solutions. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a ball-type pilot valve that can gradually control the flow rate, has a good sealing effect, is easy to process, and is convenient for mass production.

[0004] The object of the present invention is achieved through the following technical solutions: a valve ball type pilot valve, comprising a coil assembly, an electromagnet assembly and a main valve sleeve assembly, wherein the coil assembly and the main valve sleeve assembly are respectively assembled at both ends of the electromagnet assembly, the main valve sleeve assembly comprises a main valve sleeve, a pilot valve sleeve, a pilot valve core, a spring seat and a valve ball, the pilot valve sleeve is fixedly arranged in the main valve sleeve, the pilot valve core gap is adapted in the main valve sleeve, the main valve sleeve is located between the electromagnet assembly and the pilot valve sleeve, a pilot spring is arranged between the pilot valve core and the pilot valve sleeve, and the spring seat is fixed in The pilot valve sleeve is away from one end of the pilot valve core, a valve ball groove is formed between the spring seat and the pilot valve sleeve, the valve ball gap is adapted in the valve ball groove, a valve ball spring is provided between the valve ball and the pilot valve sleeve, a guide hole communicating with the valve ball groove is formed on the spring seat, a valve sleeve guide hole communicating with the valve ball groove is formed through the middle of the pilot valve sleeve, a valve core guide hole is formed through the middle of the pilot valve core, a first cut-off surface is formed between the pilot valve core and the pilot valve sleeve, and a second cut-off surface is formed between the pilot valve core and the main valve sleeve;

[0005] An annular step surface is fixed to the end face of the pilot valve sleeve close to the pilot valve core, and an inner ring surface and an outer ring surface are sequentially provided on the end face of the pilot valve core close to the pilot valve sleeve from the inside to the outside. An inner circular surface is formed on the inner wall of the main valve sleeve, and the inner ring surface contacts the annular step surface to form the first cut-off surface, and the outer ring surface contacts the inner circular surface to form the second cut-off surface.

[0006] In some embodiments, a plurality of side guide holes are formed through the side wall of the main valve sleeve, and the plurality of side guide holes are evenly distributed around the circumference of the main valve sleeve.

[0007] In some embodiments, the main valve sleeve assembly also includes an end cover and a main valve core. The end cover is fixed to the end of the main valve sleeve away from the electromagnet assembly. An end cover gasket is provided at the connection position between the end cover and the main valve sleeve. A large central hole is opened through the end cover. The main valve core gap is adapted in the main valve sleeve. The main valve core is located between the spring seat and the end cover. A main spring is provided between the spring seat and the main valve core. Under the action of the main spring, the main valve core and the end cover are fitted together in the initial position.

[0008] In some embodiments, the electromagnet assembly includes a shell, which is hollow. The main valve sleeve and the coil assembly are respectively assembled at two ends of the shell, and a shell sealing ring is mounted on the shell.

[0009] In some embodiments, the electromagnet assembly further includes a core seat, a magnetic core, a core shaft and a guide sleeve, wherein the guide sleeve is fixed in the outer shell, the magnetic core is adapted in the guide sleeve, the core shaft slides through the magnetic core, and the core shaft moves axially along the outer shell to push the pilot valve core, and the core seat is fixed in the outer shell, and the core seat is located between the guide sleeve and the pilot valve core.

[0010] In some embodiments, a through hole is provided in the middle of the magnetic core seat for the magnetic core shaft to pass through, an inner annular step surface is provided around the through hole on the end face of the magnetic core seat close to the pilot valve core, a flow hole is provided through the pilot valve core, and the inner annular step surface is located on the moving path of the flow hole.

[0011] In some embodiments, a core seat bearing is provided between the inner wall of the core seat and the outer wall of the core shaft.

[0012] In some embodiments, a guide bearing is provided between the inner wall of the guide sleeve and the outer wall of the magnetic core shaft.

[0013] In some embodiments, the electromagnet assembly further includes a magnetic isolation ring, and the magnetic isolation ring is located between the guide sleeve and the magnetic core seat.

[0014] The beneficial effects of the present invention are:

[0015] The inner ring surface of the pilot valve core and the annular step surface of the pilot valve sleeve form a first cut-off surface, and the outer ring surface of the pilot valve core and the inner circular surface of the main valve sleeve form a second cut-off surface. The movement of the pilot valve core affects the size of the two cut-off surfaces, and the flow is gradually regulated. When the gap between the first cut-off surface and the second cut-off surface is the smallest, the flow of the pilot valve is the smallest. The three end faces are sealed, the sealing effect is good, the processing difficulty is small, and it is easy to produce in batches. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a ball-type pilot valve of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of a ball-type pilot valve of the present invention;

[0018] Figure 3 for Figure 2 Enlarged view at point I in the middle;

[0019] Figure 4 This is a structural schematic diagram of a pilot valve sleeve in a ball-type pilot valve of the present invention;

[0020] Figure 5 This is a structural schematic diagram of a main valve sleeve in a ball-type pilot valve of the present invention;

[0021] Figure 6 This is a structural schematic diagram of a pilot valve core in a ball-type pilot valve of the present invention;

[0022] Figure 7 This is a structural schematic diagram of a spring seat in a ball-type pilot valve of the present invention;

[0023] Figure 8 This is a schematic diagram showing the flow path of a ball-type pilot valve of the present invention;

[0024] In the figure, 1-coil assembly, 2-housing, 3-housing sealing ring, 4-main valve sleeve, 5-end cover, 6-end cover gasket, 7-main valve core, 8-main spring, 9-core seat bearing, 10-core seat, 11-core shaft, 12-core, 13-guide bearing, 14-guide sleeve, 15-magnetic isolation ring, 16-spring seat, 17-valve ball, 18-valve ball spring, 19-pilot valve sleeve, 20-pilot valve core, 21-pilot spring, 22-electromagnet assembly, 23-main valve sleeve assembly, 24-guide hole, 25-annular step surface, 26-inner circular surface, 27-inner ring surface, 28-outer ring surface, 29-side guide hole, 30-inner annular step surface, 31-flow hole. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0026] like Figures 1 to 8 As shown, a valve ball type pilot valve includes a coil assembly 1, an electromagnet assembly 22 and a main valve sleeve assembly 23. The coil assembly 1 and the main valve sleeve assembly 23 are respectively assembled at both ends of the electromagnet assembly 22. The main valve sleeve assembly 23 includes a main valve sleeve 4, a pilot valve sleeve 19, a pilot valve core 20, a spring seat 16 and a valve ball 17. The pilot valve sleeve 19 is fixedly arranged in the main valve sleeve 4. The pilot valve core 20 is gap-fitted in the main valve sleeve 4. The main valve sleeve 4 is located between the electromagnet assembly 22 and the pilot valve sleeve 19. The pilot valve core A pilot spring 21 is provided between 20 and the pilot valve sleeve 19, a spring seat 16 is fixed to the end of the pilot valve sleeve 19 away from the pilot valve core 20, a valve ball groove is formed between the spring seat 16 and the pilot valve sleeve 19, the valve ball 17 gap is adapted in the valve ball groove, a valve ball spring 18 is provided between the valve ball 17 and the pilot valve sleeve 19, the spring seat 16 is provided with a guide hole 24 communicating with the valve ball groove, the middle part of the pilot valve sleeve 19 is penetrated with a valve sleeve guide hole communicating with the valve ball groove, the middle part of the pilot valve core 20 is penetrated with a valve There is a valve core guide hole, a first cut-off surface is formed between the pilot valve core 20 and the pilot valve sleeve 19, a second cut-off surface is formed between the pilot valve core 20 and the main valve sleeve 4, an annular step surface 25 is fixed to the end surface of the pilot valve sleeve 19 close to the pilot valve core 20, and the end surface of the pilot valve core 20 close to the pilot valve sleeve 19 is sequentially provided with an inner ring surface 27 and an outer ring surface 28 from the inside to the outside, and the inner wall of the main valve sleeve 4 is formed with an inner circular surface 26, the inner ring surface 27 contacts the annular step surface 25 to form a first cut-off surface, and the outer ring surface 28 contacts the inner circular surface. When the pilot valve core 20 moves toward the pilot valve sleeve 19, the inner ring surface 27 of the pilot valve core 20 and the annular step surface 25 of the pilot valve sleeve 19 form a first cut-off surface, and the outer ring surface 28 of the pilot valve core 20 and the inner circular surface 26 of the main valve sleeve 4 form a second cut-off surface. The movement of the pilot valve core 20 affects the size of the two cut-off surfaces, and the flow is gradually regulated. When the gap is the smallest, the flow of the pilot valve is the smallest. The three end faces are sealed, the sealing effect is good, the processing difficulty is small, and it is easy to mass produce.

[0027] In some embodiments, as Figures 1 to 7As shown, a plurality of side guide holes 29 are provided through the side wall of the main valve sleeve 4, and the plurality of side guide holes 29 are evenly distributed around the circumference of the main valve sleeve 4. The main valve sleeve assembly 23 also includes an end cover 5 and a main valve core 7. An end cover 5 is fixed to the end of the main valve sleeve 4 away from the electromagnet assembly 22, and an end cover gasket 6 is provided at the connection position between the end cover 5 and the main valve sleeve 4. A large central hole is provided through the end cover 5, and the main valve core 7 is gap-fitted in the main valve sleeve 4. The main valve core 7 is located between the spring seat 16 and the end cover 5. A main spring 8 is provided between the spring seat 16 and the main valve core 7. Under the action of the main spring 8, the main valve core 7 and the end cover 5 are fitted together in the initial position. The electromagnet assembly 22 includes an outer shell 2, and the outer shell 2 is hollow. The main valve sleeve 4 and the coil assembly 1 are respectively assembled on both sides of the outer shell 2 End, the shell 2 is provided with a shell sealing ring 3, the electromagnet assembly 22 also includes a core seat 10, a magnetic core 12, a core shaft 11 and a guide sleeve 14, the guide sleeve 14 is fixed in the shell 2, the magnetic core 12 is adapted in the guide sleeve 14, the core shaft 11 slides through the core 12, and the core shaft 11 moves axially along the shell 2 to push the pilot valve core 20, the core seat 10 is fixed in the shell 2, the core seat 10 is located between the guide sleeve 14 and the pilot valve core 20, a through hole for the core shaft 11 to pass through is opened in the middle of the core seat 10, the end face of the core seat 10 close to the pilot valve core 20 is provided with an inner annular step surface 30 around the through hole, the pilot valve core 20 is provided with a through hole 31, and the inner annular step surface 30 is located on the moving path of the through hole 31. When the current is 0A, the liquid flows in from the central large hole of the end cover 5 and enters between the end cover 5 and the main valve core 7. The liquid pressure acting on the end face of the main valve core 7 pushes the main valve core 7 toward the pilot valve sleeve 19. The liquid between the pilot valve sleeve 19 and the main valve core 7 enters the interior from the guide hole 24 on the end face of the spring seat 16. The internal liquid pressure acts on the valve ball 17. Since the elastic force of the valve ball spring 18 on the valve ball 17 is less than the liquid pressure on the valve ball 17, the valve ball 17 is pushed toward the pilot valve sleeve 19. At the same time, due to the valve ball 17 and the spring, the valve ball 17 is pushed toward the pilot valve sleeve 19. The inner hole of the spring seat 16 forms a clearance fit. Liquid flows from the gap between the valve ball 17 and the inner wall of the spring seat 16, through the valve sleeve guide hole of the pilot valve sleeve 19, and enters between the pilot valve sleeve 19 and the pilot valve core 20. The liquid pressure acts on the end face of the pilot valve core 20, pushing the pilot valve core 20 toward the core seat 10 until the bottom surface of the large end face of the pilot valve core 20 fits with the end face of the core seat 10, closing the flow hole 31 at the bottom of the main valve sleeve 4. At this time, the performance of the valve assembly is that the pressure and flow are in the middle state of the adjustable range, forming 0A protection.

[0028] In some embodiments, as Figures 1 to 8As shown, a core seat bearing 9 is provided between the inner wall of the core seat 10 and the outer wall of the core shaft 11, a guide bearing 13 is provided between the inner wall of the guide sleeve 14 and the outer wall of the core shaft 11, and the electromagnet assembly 22 further includes a magnetic isolation ring 15, which is located between the guide sleeve 14 and the core seat 10. The electromagnet movement principle is the existing technology, specifically: when the coil assembly 1 is energized, the electromagnetic force pushes the core shaft 11 toward the core seat 10. After the core shaft 11 contacts the pilot valve core 20, the electromagnetic force drives the pilot valve core 20 toward the pilot valve sleeve 19, and the flow gap between the two gradually decreases, and the flow gradually decreases. At this point, under the influence of hydraulic pressure, the hydraulic pressure on the side of valve ball 17 near pilot valve sleeve 19 increases. This combined force, combined with the spring force of valve ball spring 18, is greater than the hydraulic pressure on valve ball 17 near the oil inlet of spring seat 16, pushing valve ball 17 toward the oil inlet of spring seat 16. The flow area of ​​the oil inlet of spring seat 16 gradually decreases, which affects the hydraulic pressure of main valve core 7 near spring seat 16. After the hydraulic pressure and the spring force of main spring 8 are combined, the combined force is greater than the pressure on the oil inlet of end cover 5 on main valve core 7, pushing main valve core 7 toward end cover 5. The flow gap between the two gradually decreases, and the flow rate gradually decreases, forming a linear control. When the current of coil assembly 1 decreases, the process moves in reverse, and the flow rate gradually increases until it reaches the 0A state.

[0029] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention; and it is known to those skilled in the art that the beneficial effect to be achieved by the present invention is only to achieve better beneficial effects compared with the current implementation scheme in the prior art under specific circumstances, rather than to directly achieve the best use effect in the industry.

[0030] The foregoing description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the appended claims.

Claims

1. A valve ball type pilot valve, comprising a coil assembly (1), an electromagnet assembly (22) and a main valve sleeve assembly (23), wherein the coil assembly (1) and the main valve sleeve assembly (23) are respectively assembled at both ends of the electromagnet assembly (22), and is characterized in that: The main valve sleeve assembly (23) includes a main valve sleeve (4), a pilot valve sleeve (19), a pilot valve core (20), a spring seat (16) and a valve ball (17), wherein the pilot valve sleeve (19) is fixedly arranged in the main valve sleeve (4), and the pilot valve core (20) is gap-fitted in the main valve sleeve (4), and the main valve sleeve (4) is located between the electromagnet assembly (22) and the pilot valve sleeve (19), and a pilot spring (21) is arranged between the pilot valve core (20) and the pilot valve sleeve (19), and the spring seat (16) is fixed to one end of the pilot valve sleeve (19) away from the pilot valve core (20), and the spring seat (16) is in contact with the pilot valve core (20). A valve ball groove is formed between the pilot valve sleeve (19), the valve ball (17) is gap-fitted in the valve ball groove, a valve ball spring (18) is provided between the valve ball (17) and the pilot valve sleeve (19), the spring seat (16) is provided with a guide hole (24) communicating with the valve ball groove, a valve sleeve guide hole communicating with the valve ball groove is provided through the middle of the pilot valve sleeve (19), a valve core guide hole is provided through the middle of the pilot valve core (20), a first cut-off surface is formed between the pilot valve core (20) and the pilot valve sleeve (19), and a second cut-off surface is formed between the pilot valve core (20) and the main valve sleeve (4); An annular step surface (25) is fixed to the end surface of the pilot valve sleeve (19) close to the pilot valve core (20), and an inner ring surface (27) and an outer ring surface (28) are sequentially provided on the end surface of the pilot valve core (20) close to the pilot valve sleeve (19) from the inside to the outside. An inner circular surface (26) is formed on the inner wall of the main valve sleeve (4), and the inner circular surface (27) contacts the annular step surface (25) to form the first shut-off surface, and the outer ring surface (28) contacts the inner circular surface (26) to form the second shut-off surface. The electromagnet assembly (22) comprises a housing (2), the housing (2) being hollow, the main valve sleeve (4) and the coil assembly (1) being respectively assembled at two ends of the housing (2), and a housing sealing ring (3) being mounted on the housing (2).

2. A ball-type pilot valve according to claim 1, characterized in that: A plurality of side guide holes (29) are formed through the side wall of the main valve sleeve (4), and the plurality of side guide holes (29) are evenly distributed around the circumference of the main valve sleeve (4).

3. A ball-type pilot valve according to claim 2, characterized in that: The main valve sleeve assembly (23) further comprises an end cover (5) and a main valve core (7), the end cover (5) being fixed to one end of the main valve sleeve (4) away from the electromagnet assembly (22), an end cover gasket (6) being provided at the connection position between the end cover (5) and the main valve sleeve (4), the end cover (5) being provided with a central large hole, the main valve core (7) being gap-fitted into the main valve sleeve (4), the main valve core (7) being located between the spring seat (16) and the end cover (5), a main spring (8) being provided between the spring seat (16) and the main valve core (7), and under the action of the main spring (8), the main valve core (7) and the end cover (5) are fitted together in the initial position.

4. The ball-type pilot valve according to claim 1, characterized in that: The electromagnet assembly (22) further includes a core seat (10), a magnetic core (12), a core shaft (11) and a guide sleeve (14), wherein the guide sleeve (14) is fixed in the housing (2), the magnetic core (12) is adapted in the guide sleeve (14), the core shaft (11) slides through the core (12), and the core shaft (11) moves axially along the housing (2) to push the pilot valve core (20), the core seat (10) is fixed in the housing (2), and the core seat (10) is located between the guide sleeve (14) and the pilot valve core (20).

5. The ball-type pilot valve according to claim 4, characterized in that: A through hole is provided in the middle of the magnetic core seat (10) for the magnetic core shaft (11) to pass through, and an inner annular step surface (30) is provided around the through hole on the end face of the magnetic core seat (10) close to the pilot valve core (20), and a flow hole (31) is provided through the pilot valve core (20), and the inner annular step surface (30) is located on the moving path of the flow hole (31).

6. The ball-type pilot valve according to claim 4, characterized in that: A magnetic core seat bearing (9) is provided between the inner wall of the magnetic core seat (10) and the outer wall of the magnetic core shaft (11).

7. The ball-type pilot valve according to claim 6, characterized in that: A guide bearing (13) is provided between the inner wall of the guide sleeve (14) and the outer wall of the magnetic core shaft (11).

8. The ball-type pilot valve according to claim 7, characterized in that: The electromagnet assembly (22) further includes a magnetic isolation ring (15), wherein the magnetic isolation ring (15) is located between the guide sleeve (14) and the magnetic core seat (10).

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