Search

CN-224214469-U - Oil way proportional valve with anti-jamming function

CN224214469UCN 224214469 UCN224214469 UCN 224214469UCN-224214469-U

Abstract

The utility model provides an oil way proportional valve with a clamping stagnation prevention function, relates to the technical field of proportional valves, and aims to solve the technical problem that the proportional valve in the prior art is easy to be clamped; the oil way proportional valve with the anti-jamming function comprises a shell, a magnetic yoke, a magnetic conduction plate, a first elastic sheet, a second elastic sheet and a movable iron core component, wherein the magnetic yoke is arranged in the shell, a mounting cavity is formed in the magnetic yoke, the magnetic conduction plate is arranged in the mounting cavity and is provided with a first mounting hole, the first elastic sheet is connected in the magnetic conduction plate and is provided with a first through hole, the second elastic sheet is connected in the magnetic yoke and is provided with a second through hole which is coaxially arranged with the first through hole, the upper end and the lower end of the movable iron core component are respectively connected in the first through hole and the second through hole, and at least one part of the movable iron core component is positioned in the first mounting hole and is provided with a gap with the inner wall of the first mounting hole.

Inventors

  • SHANGGUAN BAIJUN
  • YU GUANMIN

Assignees

  • 宁波恩都法新能源科技有限公司

Dates

Publication Date
20260508
Application Date
20250626

Claims (9)

  1. 1. An oil circuit proportional valve with anti-jamming function, which is characterized by comprising: A housing (1); a magnet yoke (2) arranged in the shell (1) and provided with a mounting cavity (3) in the magnet yoke (2); The magnetic conduction plate (4) is arranged in the mounting cavity (3) and provided with a first mounting hole (5); The first elastic sheet (6) is connected in the magnetic conduction plate (4) and provided with a first through hole (7); The second elastic piece (8) is connected in the magnetic yoke (2) and is provided with a second through hole (9) coaxially arranged with the first through hole (7); The movable iron core assembly (10), both ends about movable iron core assembly (10) are connected respectively first through-hole (7) with in second through-hole (9), at least a portion of movable iron core assembly (10) is located in first mounting hole (5) and with be equipped with the clearance between first mounting hole (5) inner wall.
  2. 2. The oil way proportional valve with the anti-jamming function according to claim 1, wherein a first positioning hole (11) is formed in the upper end of the magnetic conduction plate (4), the first elastic piece (6) is connected to the bottom end of the first positioning hole (11) and is limited in the radial direction by the first positioning hole (11), and an upper pressing plate (12) abutted to the upper portion of the first elastic piece (6) is connected in the first positioning hole (11).
  3. 3. The oil way proportional valve with the anti-jamming function according to claim 2, wherein the first mounting hole (5) penetrates through the magnetic conductive plate (4) along the axial direction and is located below the first positioning hole (11), a protruding portion (13) is arranged at the upper end of the movable iron core assembly (10), a limiting block (14) and a limiting rubber block (15) are sequentially sleeved on the protruding portion (13) from top to bottom, and the limiting block (14) and the limiting rubber block (15) are respectively propped against the upper end and the lower end of the first elastic sheet (6).
  4. 4. The oil way proportional valve with the anti-jamming function according to claim 1, wherein a second positioning hole (16) is formed in the bottom end of the magnetic yoke (2), the second elastic sheet (8) is connected to the top end of the second positioning hole (16) and is limited in the radial direction by the second positioning hole (16), and a lower pressing plate (17) abutted to the lower portion of the second elastic sheet (8) is connected in the second positioning hole (16).
  5. 5. The oil way proportional valve with the anti-jamming function according to claim 4, wherein the second positioning hole (16) is located below the installation cavity (3), the movable iron core assembly (10) comprises a movable iron core body (101) and a pin (102) which are coaxially arranged, a part of the movable iron core body (101) is located in the first installation hole (5) and is provided with a gap with the inner wall of the first installation hole (5), the pin (102) is connected to the bottom end of the movable iron core body (101), the installation cavity (3) axially penetrates through the magnetic yoke (2) so that the pin (102) is exposed from the lower end of the installation cavity (3) and is located below the installation cavity (3), the pin (102) comprises an expanding portion (1021) and a reducing portion (1022) arranged at the lower end of the expanding portion (1021), the reducing portion (1022) is connected in the second through hole (9), a sleeve (18) is sleeved on the reducing portion (1022), and the bottom end of the pin (102) is abutted against the two ends of the expanding portion (1021) and the two ends of the sleeve (18) respectively.
  6. 6. The oil way proportional valve with the anti-jamming function according to claim 1, further comprising a blocking cover (19), wherein an opening is formed in the upper end of the housing (1), the blocking cover (19) is connected in the opening, and a first sealing ring (20) is arranged between the outer peripheral wall of the blocking cover (19) and the inner peripheral wall of the opening.
  7. 7. The oil way proportional valve with the anti-jamming function according to claim 6, wherein a coil assembly (21) is further arranged in the installation cavity (3), two annular walls (22) are arranged at the top end of the coil assembly (21), a second installation hole (23) is formed by surrounding each annular wall (22), electromagnetic valve pins (24) are connected in each second installation hole (23), a second sealing ring (25) is arranged between the top end of each annular wall (22) and the plug cover (19), and two plug cover pins (26) corresponding to the two electromagnetic valve pins (24) are arranged in the plug cover (19).
  8. 8. The oil circuit proportional valve with the anti-jamming function according to claim 1, wherein the first elastic piece (6) and the second elastic piece (8) comprise two arc-shaped portions (27) and four bent strips (28), the two arc-shaped portions (27) are arranged left and right, one end of each bent strip (28) is arranged on the inner side of one arc-shaped portion (27), one end of each other bent strip (28) is arranged on the inner side of the other arc-shaped portion (27), the other end of each bent strip (28) is mutually jointed to form a central portion (29), the first through hole (7)/the second through hole (9) are arranged on the central portion (29), and the four bent strips (28) are circumferentially arranged around the first through hole (7)/the second through hole (9).
  9. 9. The oil path proportional valve with the anti-jamming function according to claim 1, wherein a gap size between the movable iron core assembly (10) and the inner wall of the first mounting hole (5) ranges from 0.1 mm to 0.2mm.

Description

Oil way proportional valve with anti-jamming function Technical Field The utility model relates to the technical field of proportional valves, in particular to an oil way proportional valve with an anti-jamming function. Background The oil way proportional valve is a core control element in a hydraulic system, and basically has the function of converting an input electric signal into force or displacement in a proportional, continuous and accurate manner, so that parameters such as pressure, flow and the like are continuously controlled. Chinese patent CN213954228U discloses a digital proportional valve for damper damping force adjustment control, including magnetic yoke assembly, coil assembly, armature push rod assembly and pilot valve spring, armature push rod assembly and coil assembly set up in magnetic yoke assembly, sliding fit between armature push rod assembly and the magnetic yoke assembly, coil assembly passes through nut fixed mounting in magnetic yoke assembly, coil assembly cover is established outside armature push rod assembly, can promote armature push rod assembly along magnetic yoke assembly axial direction motion when the coil assembly is circular telegram, be provided with between armature push rod assembly and magnetic yoke assembly and stop seat, pilot valve spring sets up between stop seat and armature push rod assembly, provide the restoring force that makes its initial position of restoring for armature push rod assembly, namely when coil assembly is cut off the electromagnetic force of armature push rod assembly to the coil assembly, pilot valve spring promotes armature push rod assembly to move back initial position towards the opposite direction. In the above proportional valve, because the armature push rod assembly and the magnetic yoke assembly need to be in sliding fit, a gap is necessarily formed between the armature push rod assembly and the magnetic yoke assembly, and on the basis, the gap cannot be excessively large in size in order to keep the centering of the armature push rod assembly, otherwise, the radial position of the armature push rod assembly is offset. Therefore, once foreign matters enter a tiny gap between the armature push rod assembly and the magnetic yoke assembly, the foreign matters are easy to be blocked. In addition, in general, the hydraulic oil in the proportional valve is not conductive, but there is a risk of leakage of the hydraulic oil mixed with foreign matter. Disclosure of utility model Aiming at the defects of the prior art, the utility model aims to provide an oil way proportional valve with an anti-jamming function, so as to solve the technical problem that the proportional valve in the prior art is easy to jam. In order to solve the technical problems, the utility model provides an oil way proportional valve with an anti-jamming function, which comprises: A housing; the magnetic yoke is arranged in the shell and is internally provided with a mounting cavity; The magnetic conduction plate is arranged in the mounting cavity and provided with a first mounting hole; The first elastic sheet is connected in the magnetic conduction plate and provided with a first through hole; The second elastic sheet is connected in the magnetic yoke and provided with a second through hole coaxially arranged with the first through hole; The upper end and the lower end of the movable iron core assembly are respectively connected in the first through hole and the second through hole, and at least one part of the movable iron core assembly is positioned in the first mounting hole and is provided with a gap with the inner wall of the first mounting hole. After the structure is adopted, the oil way proportional valve with the anti-jamming function has the advantages that the movable iron core assembly is fixed through the first elastic piece and the second elastic piece, the first through hole of the first elastic piece and the second through hole of the second elastic piece are coaxially arranged, the movable iron core assembly can be vertically arranged, the elastic first elastic piece and the elastic second elastic piece can keep the movable iron core assembly to be centered, and after the movable iron core assembly vertically moves, the first elastic piece and the second elastic piece can also play a role in automatically resetting the movable iron core assembly, so that larger gaps can be arranged between the movable iron core assembly and the inner wall of the first mounting hole and even between the movable iron core assembly and other structures in the proportional valve, so that jamming caused by vertical movement of the movable iron core assembly can be prevented. By adopting the structure, the first positioning hole is used for radially limiting the first elastic piece, the upper pressing plate is matched with the upper pressing plate for axially fixing the first elastic piece, and the movable iron core component position deviation caused by the displacem