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CN-224228990-U - Hydraulic cylinder

CN224228990UCN 224228990 UCN224228990 UCN 224228990UCN-224228990-U

Abstract

The utility model belongs to the technical field of fluid pressure actuating mechanisms and provides a hydraulic cylinder, which comprises a cylinder barrel, wherein the cylinder barrel is provided with an opening and a piston cavity, a piston is provided with a limiting part, a spring structure is assembled on the inner peripheral wall of the piston cavity in a clearance fit mode, the spring structure is formed by stacking disc-shaped spring piece groups, a sealing cover is connected to the piston cavity, the piston in the hydraulic cylinder is assembled on the inner peripheral wall of the cylinder barrel in a clearance fit mode, the cylinder barrel is detachably connected to the opening of the cylinder barrel, and obviously, the spring structure which is positioned in the piston cavity of the piston and is positioned between the piston and the end portion, far away from the opening, of the cylinder barrel is detachable. Therefore, the output force of the spring structure is adjusted to the required output force by increasing or decreasing the number of any one or more of the combined type disc spring piece groups, the overlapped combined type disc spring piece groups and the combined type disc spring piece groups, and the time and the labor are saved without specially customizing the pressure spring.

Inventors

  • JIANG CHENGSHU
  • SHU PINGGUO
  • MAO YUPING

Assignees

  • 宁波中天联合机电制造有限公司

Dates

Publication Date
20260512
Application Date
20250519

Claims (9)

  1. 1. A hydraulic cylinder, comprising: A cylinder tube (10) having a piston chamber (100), and the piston chamber (100) is formed with an opening (101) at one end of the cylinder tube (10); a piston (11) which is located in the piston chamber (100) and is slidably sealed on the inner peripheral wall of the piston chamber (100), wherein the piston (11) is provided with a limit part (110); The spring structure (12) is positioned between the end part of the cylinder barrel (10) far away from the opening (101) and the piston (11) and is in clearance fit on the inner peripheral wall of the piston cavity (100), the spring structure (12) is at least partially sleeved on the limiting part (110) and is in clearance fit with the limiting part (110), the spring structure (12) is formed by stacking a plurality of disc-shaped spring piece groups (120) along the axial direction, and each disc-shaped spring piece group (120) comprises any one or a combination of a plurality of disc-shaped spring piece groups (1200), a superposed disc-shaped spring piece group (1201) or a composite disc-shaped spring piece group (1202); a sealing cover (13) detachably attached to the inner peripheral wall of the piston chamber (100) and closing the opening (101).
  2. 2. The hydraulic cylinder of claim 1, wherein the combined stack of belleville springs (1200) and the combined stack of belleville springs (1201) each comprise two belleville spring singlets (1203); The combined type disc spring piece group (1200) is formed by combining two disc spring single pieces (1203) which are oppositely arranged, and the overlapped combined type disc spring piece group (1201) is formed by overlapping the two disc spring single pieces (1203); The composite combined type disc-shaped spring piece group (1202) is formed by combining two groups of overlapped combined type disc-shaped spring piece groups (1201) which are oppositely arranged.
  3. 3. The hydraulic cylinder according to claim 2, wherein the spring structure (12) is formed by stacking a plurality of groups (1200) of said mating combination disc spring plates on top of each other.
  4. 4. A hydraulic cylinder according to claim 3, wherein said single disc spring sheet (1203) has a first face and a second face (1203 b) opposite to said first face (1203 a), respectively, on both sides thereof; A first surface (1203 a) of one belleville spring single piece (1203) in the two belleville spring single pieces (1203) of the involutory combined belleville spring piece group (1200) is attached to a first surface (1203 a) of the other belleville spring single piece (1203).
  5. 5. The hydraulic cylinder according to claim 4, further comprising a piston rod (14); The sealing cover (13) is provided with a through hole (130), the piston rod (14) is connected to the piston (11) through the through hole (130) in a threaded mode, and a wear-resistant element is arranged between the wall of the through hole (130) and the peripheral side wall of the piston (11) rod.
  6. 6. A hydraulic cylinder according to claim 5, characterized in that a second wear element (16) is arranged between the outer circumferential side wall of the piston (11) and the inner circumferential side wall of the piston chamber (100).
  7. 7. A hydraulic cylinder as claimed in claim 6, characterized in that a sealing element (17) is also provided between the outer circumferential side wall of the piston (11) and the inner circumferential side wall of the piston chamber (100).
  8. 8. A hydraulic cylinder according to any one of claims 1-7, characterized in that the centre line of the spring structure (12), the axis of the piston (11) and the axis of the piston (11) rod coincide with each other.
  9. 9. The hydraulic cylinder according to any one of claims 1 to 7, characterized in that the limit part (110) is provided with a mounting hole (1100) and the hydraulic cylinder (1) is fitted to the work vehicle in such a way that a threaded rod passes through the spring structure (12) via the cylinder tube (10) and is inserted into the mounting hole (1100).

Description

Hydraulic cylinder Technical Field The utility model belongs to the technical field of fluid pressure executing elements, and particularly relates to a hydraulic cylinder. Background The hydraulic cylinder is used as a core executing element in a hydraulic system and is widely applied to the fields of engineering machinery, aerospace, ship manufacturing, metallurgical equipment and the like. The hydraulic cylinder has the beneficial effects that the cylinder can acquire different cylinder pressing forces under the same oil pressure by adjusting the rectangular spring mechanism, and the compression spring (or the spring mechanism) in the existing hydraulic cylinder usually needs to be specially customized according to the required output force, so that the hydraulic cylinder has the advantages of labor and effort and high manufacturing cost. Based on this, it is necessary to invent a hydraulic cylinder to solve the foregoing technical problems. Disclosure of Invention The utility model aims to solve the technical problem of designing a spring structure which is suitable for a hydraulic cylinder and can adjust the output force, and provides the hydraulic cylinder aiming at the problem. The technical scheme for solving the technical problems is that the utility model provides a hydraulic cylinder, which comprises: a cylinder tube having a piston chamber, the piston chamber being formed with an opening at one end of the cylinder tube; the piston is positioned in the piston cavity and can be sealed on the inner peripheral wall of the piston cavity in a sliding way; The spring structure is positioned between the end part of the cylinder barrel far away from the opening and the piston and is arranged on the inner peripheral wall of the piston cavity in a clearance fit mode, is at least partially sleeved on the limiting part and is in clearance fit with the limiting part, is formed by mutually stacking a plurality of groups of disc-shaped spring piece groups along the axial direction, and each group of disc-shaped spring piece groups comprises any one or a combination of a plurality of groups of the involutory combined disc-shaped spring pieces, the overlapped combined disc-shaped spring piece groups or the combined disc-shaped spring piece groups; And a sealing cover detachably coupled to an inner peripheral wall of the piston chamber and sealing the opening. In one specific embodiment, the combined type disc spring piece group and the overlapped combined type disc spring piece group comprise two disc spring singlechips, and the combined type disc spring piece group is formed by combining two groups of the overlapped combined type disc spring pieces in a combined mode; The combined type disc spring piece is formed by combining two disc spring single pieces which are oppositely arranged, and the overlapped combined type disc spring piece is formed by overlapping the two disc spring single pieces. In one embodiment, the spring structure is formed by stacking a plurality of groups of the involutory combined disc-shaped spring pieces in groups. In one specific embodiment, two sides of the belleville spring single piece are respectively provided with a first surface and a second surface opposite to the first surface; And the first surface of one disc spring single piece of the two disc spring single pieces grouped by the involutory combined disc spring piece is jointed with the first surface of the other disc spring single piece. In one specific embodiment, the piston rod is further included; the sealing cover is provided with a through hole, the piston rod is connected to the piston in a threaded manner after passing through the through hole, and a wear-resistant element is arranged between the wall of the through hole and the peripheral side wall of the piston rod. In one embodiment, the center line of the spring structure, the axis of the piston and the axis of the piston rod coincide with each other. In one specific embodiment, the limiting part is provided with a mounting hole in a clamping mode, and the hydraulic cylinder is assembled on the engineering vehicle in a mode that a threaded rod passes through the spring structure through the cylinder barrel and then is inserted into the mounting hole. Preferably, a second wear element is also provided between the outer peripheral side wall of the piston and the inner peripheral side wall of the piston chamber. Preferably, a sealing element is also provided between the outer peripheral side wall of the piston and the inner peripheral side wall of the piston chamber. The sealing cover is detachably connected to the opening of the cylinder barrel due to the fact that the piston is in clearance fit to the inner side peripheral wall of the cylinder barrel, and obviously, the spring structure which is positioned in the piston cavity of the cylinder barrel and is positioned between the piston and the end, far away from the opening, of the cylinder barrel is detachable relat