Integral electromagnet structure for electromagnetic valve

Abstract

The utility model discloses an integral electromagnet structure for an electromagnetic valve, which relates to the technical field of pilot valves and comprises an electromagnet assembly, a coil assembly and a main valve sleeve assembly, the coil assembly and the main valve sleeve assembly are assembled at two ends of the electromagnet assembly, the electromagnet assembly comprises a shell, an embedded body and a driving shaft, the embedded body is of an integral structure and is pressed in the shell in an interference manner, and the driving shaft is arranged in the shell. The driving shaft is installed in the embedded body and has the freedom degree of moving in the axial direction of the embedded body. The integrated pole shoe electromagnet is adopted as the embedded body, the machining process is simple, the deformation amount is small, therefore, the ferromagnetic force consistency of the electromagnet is better, and finally the performance of the electromagnetic valve is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of pilot valves, in particular to an integral electromagnet structure for a solenoid valve. Background Art

[0002] Shock absorbers are a crucial component of vehicle suspension systems, primarily responsible for damping vibrations caused by road bumps. They utilize internal fluid and pores to 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 and improved safety for drivers and passengers. This is particularly beneficial for protecting batteries and other components in new energy vehicles. The solenoid pole piece of the pilot solenoid valve used in existing technologies is welded together in a split-piece process, which results in complex manufacturing processes and significant post-weld deformation. This leads to unstable electromagnetic force, which in turn affects the overall performance of the solenoid valve. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide an integral electromagnet structure for a solenoid valve, so as to solve the deficiencies of the prior art.

[0004] The purpose of the utility model is achieved through the following technical solutions: an integral electromagnet structure for a solenoid valve, comprising an electromagnet assembly and a coil assembly and a main valve sleeve assembly assembled at both ends of the electromagnet assembly, the electromagnet assembly comprising an outer shell, an inlay and a drive shaft, the inlay being an integral structure, the inlay being interference-pressed in the outer shell, the drive shaft being installed in the inlay, and the drive shaft having the freedom to move axially along the inlay.

[0005] Furthermore, the inlay is a stepped shaft structure, an annular groove is provided on the middle small outer circle of the inlay, the cross-section of the annular groove is trapezoidal, and the width of the annular groove gradually decreases in the direction close to the axis of the inlay.

[0006] Furthermore, the inner body is sequentially equipped with a guide bearing, an iron core and a limit seat in the direction close to the main valve sleeve assembly, the limit seat bearing is installed in the limit seat, and the drive shaft slides through the guide bearing, the iron core and the limit seat bearing.

[0007] The beneficial effects of the utility model are:

[0008] 1. The inlay adopts an integrated pole shoe electromagnet with simple processing technology and small deformation, which makes the ferromagnetic force consistency of the electromagnet better and the performance of the solenoid valve more stable.

[0009] 2. Under the action of the annular groove, the thickness of the inner diameter and outer diameter of the embedded part is minimized to make the electromagnetic circuit more concentrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of an inlay in the prior art;

[0011] Figure 2 This is a schematic diagram of the assembly of the outer shell and the inner body of the integral electromagnet structure for a solenoid valve of the utility model;

[0012] Figure 3 This is a structural diagram of an embedded body in an integral electromagnet structure for a solenoid valve according to the present invention;

[0013] Figure 4 This is a partial schematic diagram of an integral electromagnet structure for a solenoid valve of the utility model;

[0014] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0015] Figure 6 This is a schematic diagram of the internal structure of an integral electromagnet structure for a solenoid valve of the utility model;

[0016] Figure 7 for Figure 6 Enlarged view at point I in the middle;

[0017] Figure 8 This is a structural diagram of a piston rod in an integral electromagnet structure for a solenoid valve of the utility model;

[0018] Figure 9 This is a structural diagram of a spring limit seat in an integral electromagnet structure for a solenoid valve of the utility model;

[0019] Figure 10 This is a structural diagram of a piston sleeve in an integral electromagnet structure for a solenoid valve of the utility model;

[0020] Figure 11 This is a flow channel display of an integral electromagnet structure for a solenoid valve of the utility model;

[0021] Figure 12 This is a schematic structural diagram of an integral electromagnet structure for a solenoid valve according to the present invention;

[0022] In the figure, 1-coil assembly, 2-housing, 3-housing sealing ring, 4-main control sleeve, 5-main control seat gasket, 6-main control seat, 7-main control end, 8-main spring, 9-limit seat bearing, 10-limit seat, 11-drive shaft, 12-iron core, 13-guide bearing, 14-inlay, 15-sealing ring, 16-piston sleeve, 17-gasket, 18-piston rod, 19-spring limit seat, 20-secondary spring, 21-regulating seat, 22-electromagnet assembly, 23-main valve sleeve assembly, 24-central large hole, 25-small hole, 26-matching hole, 27-flow hole, 28-long cylinder, 29-cone, 30-guide hole, 31-side flow hole, 32-side flow hole, 33-guide channel, 34-annular groove. DETAILED DESCRIPTION

[0023] Example 1

[0024] like Figures 1 to 5 As shown, an integral electromagnet structure for a solenoid valve includes an electromagnet assembly 22 and a coil assembly 1 and a main valve sleeve assembly 23 assembled at both ends of the electromagnet assembly 22. The electromagnet assembly 22 includes a housing 2, an inlay 14 and a drive shaft 11. The inlay 14 is an integral structure. The inlay 14 is press-fitted into the housing 2. The drive shaft 11 is installed in the inlay 14. The drive shaft 11 has the freedom to move axially along the inlay 14. Figure 1 The pole shoe electromagnet structure in the prior art is formed by split welding, which has a complex processing technology and a large deformation after welding, resulting in unstable electromagnetic force. Figure 2 As shown, the present application designs the existing pole shoe electromagnet structure into an integrated inlay 14, which has a simple processing technology and a small deformation, thereby making the ferromagnetic force consistency of the electromagnet better and ultimately making the performance of the solenoid valve more stable.

[0025] Further, if Figures 3 to 5 As shown, the inlay 14 is a stepped shaft structure, and an annular groove 34 is provided on the small outer circle in the middle of the inlay 14. The cross-sectional shape of the annular groove 34 is trapezoidal, and the width of the annular groove 34 gradually decreases in the direction close to the axis of the inlay 14. The cross-sectional shape of the annular groove 34 forms two inclined surfaces, namely inclined surface 1 and inclined surface 2. The thickness of the inner diameter and outer diameter of the inlay 14 at the annular groove 34 is greatly reduced, making the electromagnetic circuit more concentrated; Figure 5 and Figure 6As shown, the inner side of the inlay 14 is sequentially equipped with a guide bearing 13, an iron core 12 and a limit seat 10 along the direction close to the main valve sleeve assembly 23. The limit seat bearing 9 is installed in the limit seat 10. The drive shaft 11 slides through the guide bearing 13, the iron core 12 and the limit seat bearing 9. When the end face of the iron core 12 is close to the intersection B of the outer diameter and the inclined surface 1, the iron core 12 is always forced to move to the right, thereby pushing the drive shaft 11 to move to the right. Conversely, when the end face of the iron core 12 is close to the intersection C of the outer diameter and the inclined surface 2, the iron core is always forced to move to the left, thereby pushing the drive shaft 11 to move to the left.

[0026] Furthermore, a sealing ring 15 is provided between the shell 2 and the inlay 14 to improve the sealing performance between the shell 2 and the inlay 14. A shell sealing ring 3 is sleeved on the shell 2 to improve the installation sealing performance of the solenoid valve.

[0027] Example 2

[0028] Based on the first embodiment, Figures 6 to 12 As shown, the main valve sleeve assembly 23 includes a main control sleeve 4, a main control seat 6, a main control end 7, a piston sleeve 16 and a piston rod 18. One end of the main control sleeve 14 is assembled in the inlay 14. The main control sleeve 4 is hollow. The piston sleeve 16 and the main control seat 6 are both circumferentially fixed in the main control sleeve 4. The main control end 7 is gap-assembled in the main control sleeve 4, and the main control end 7 is located between the piston sleeve 16 and the main control seat 6. The piston rod 18 is slidably assembled in the main control sleeve 4. The piston rod 18 moves axially along the piston sleeve 16, and the piston sleeve 16 is located between the piston rod 18 and the main control end 7. The plug rod 18 includes an elongated cylinder 28 and a frustum 29. The elongated cylinder 28 slides through the spring limit seat 19. The end of the elongated cylinder 28 close to the piston sleeve 16 is connected to the large diameter end of the frustum 29. The matching hole 26 is conical in shape, and the diameter gradually decreases in the direction away from the piston rod 18; the arc surface of the piston rod 18 and the conical surface of the piston sleeve 16 form a second cut-off surface, and the main control seat 6 and the main control end 7 form a first cut-off surface. The size of the gap between the piston rod 18 and the piston sleeve 16 directly affects the size of the first cut-off surface, so as to perform linear regulation of the flow rate.

[0029] Example 3

[0030] Based on the second embodiment, Figures 6 to 12As shown, the main control seat 6 is penetrated by a central large hole 24, the main control end 7 is penetrated by a small hole 25, the piston sleeve 16 is provided with a matching hole 26 at one end close to the piston rod 18, the matching hole 26 is located on the moving path of the piston rod 18, and the side wall of the piston sleeve 16 is provided with a flow hole 27 connected to the matching hole 26. The main control seat 6 and the main control end 7 contact to form a first cut-off surface, and the piston rod 18 cooperates with the matching hole 26 to form a second cut-off surface. The main valve sleeve assembly 23 also includes The spring limit seat 19 is fixed in the main control sleeve 4. The spring limit seat 19 is penetrated by a guide hole 30. The piston sleeve 16 is located between the spring limit seat 19 and the main control end 7. The piston rod 18 slides through the spring limit seat 19. The spring limit seat 19 is used to guide the piston rod 18. The main valve sleeve assembly 23 also includes a regulating seat 21. The regulating seat 21 is assembled in the main control sleeve 4. The regulating seat 21 is close to the inlay 14 and the spring The spring limit seat 19 is located between the piston sleeve 16 and the regulating seat 21. A secondary spring 20 is provided between the spring limit seat 19 and the regulating seat 21. A side flow hole 31 is provided on the regulating seat 21. The piston sleeve 16 is a stepped shaft structure. A gasket 17 is provided on the fixed sleeve at one end of the piston sleeve 16 close to the main control end 7. A main spring 8 is provided between the gasket 17 and the main control end 7. A main control seat gasket 5 is provided between the main control seat 6 and the main control sleeve 4. A side passage is provided on the side wall of the main control sleeve 4. Flow hole 32, the side flow hole 32 is located between the main control seat 6 and the main control end 7, an installation step is formed in the inlay 14, the end of the main control sleeve 4 away from the main control seat 6 is fixedly assembled in the inlay 14, and a guide gap is formed between the end of the main control sleeve 4 away from the main control seat 6 and the installation step, and a guide channel 33 is formed between the outer wall of the main control sleeve 4 and the inner wall of the inlay 14. The guide channel 33 is connected to the guide gap, and the regulating seat 21 opens or closes the guide gap by moving. The specific operation process of the above-mentioned pilot valve is as follows: when the current is 0A, the liquid flows in from the central large hole 24 of the main control seat 6, enters between the main control seat 6 and the main control end 7, and the liquid pressure acting on the end surface of the main control end 7 pushes the main control end 7 toward the piston sleeve 16. The liquid between the piston sleeve 16 and the main control end 7 enters the matching hole 26 from the flow hole 27 on the outer circle of the piston sleeve 16. The internal liquid pressure acts on the piston rod 18, pushing the piston rod 18 toward the spring limit seat 19. At the same time, due to the piston rod 18 and the piston sleeve 1 6 inner holes form a clearance fit, and the liquid enters between the regulating seat 21 and the spring limit seat 20 through the guide hole 30 of the spring limit seat 19 from the gap between the piston rod 18 and the inner wall of the piston sleeve 16. The liquid pressure acts on the end face of the regulating seat 21, pushing the regulating seat 21 toward the limit seat 10 until the bottom surface of the large end face of the regulating seat 21 fits with the end face of the limit seat 10, closing the guide gap at the bottom of the main control 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.

[0031] When the coil assembly 1 is energized, the electromagnetic force pushes the drive shaft 11 toward the limit seat 10. After the drive shaft 11 contacts the control seat 21, the electromagnetic force drives the control seat 21 to move toward the spring limit seat 19. At the same time, the control seat 21 pushes the piston rod 18 toward the piston sleeve 16. The flow gap between the two gradually decreases, and the flow rate gradually decreases. At this time, under the influence of the liquid pressure, the liquid pressure on the side of the piston rod 18 close to the spring limit seat 19 increases, which is greater than the liquid pressure of the piston rod 18 close to the oil inlet of the piston sleeve 16, pushing the piston rod 18 toward the oil inlet of the piston sleeve 16. The flow area of ​​the oil inlet of the piston sleeve 16 gradually decreases, thereby affecting the increase of the liquid pressure of the main control end 7 close to the piston sleeve 16. After the liquid pressure is superimposed on the spring force of the main spring 8, the superimposed force is greater than the pressure at the oil inlet of the main control seat 6 on the main control end 7, pushing the main control end 7 toward the main control seat 6, the flow gap between the two gradually decreases, and the flow rate gradually decreases, forming linear regulation. 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.

Claims

1. An integrated electromagnet structure for a solenoid valve, comprising an electromagnet assembly (22) and a coil assembly (1) and a main valve sleeve assembly (23) assembled at both ends of the electromagnet assembly (22), characterized in that: The electromagnet assembly (22) comprises a housing (2), an inlay (14) and a drive shaft (11); the inlay (14) is an integral structure; the inlay (14) is press-fitted into the housing (2); the drive shaft (11) is installed in the inlay (14); and the drive shaft (11) has the freedom to move axially along the inlay (14).

2. The integrated electromagnet structure for a solenoid valve according to claim 1, characterized in that: The inlay (14) is a stepped shaft structure, and an annular groove (34) is provided on the middle small outer circle of the inlay (14). The cross-sectional shape of the annular groove (34) is trapezoidal, and the width of the annular groove (34) gradually decreases in a direction close to the axis of the inlay (14).

3. The integrated electromagnet structure for a solenoid valve according to claim 1, characterized in that: The inlay (14) is sequentially equipped with a guide bearing (13), an iron core (12) and a limit seat (10) along a direction close to the main valve sleeve assembly (23); a limit seat bearing (9) is installed in the limit seat (10); and the drive shaft (11) is slidably arranged in the guide bearing (13), the iron core (12) and the limit seat bearing (9).

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