A fixed jaw piston seal structure
Patent Information
- Application Number
- CN202522315178.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0003]但目前的密封件与活塞上的密封槽连接紧凑性低，高压进油下导致密封件偏移，导致油液从两者间隙中泄露，影响油缸的密封性能
[0009] Compared with existing technologies, this fixed clamp piston sealing structure has the advantage of improving the installation compactness of the sealing structure and thus improving the sealing performance.
Smart Images
Figure CN224729849U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of braking machinery technology, and relates to a fixed caliper piston, and particularly to a fixed caliper piston sealing structure. Background Technology
[0002] The piston is a reciprocating component in a hydraulic cylinder. A seal is typically required between the piston and the cylinder (mainly by installing seals on the piston itself) to ensure the cylinder's performance.
[0003] However, the current seals have poor tightness in connection with the sealing grooves on the piston. Under high pressure oil inlet, the seals may shift, causing oil to leak from the gap between them, which affects the sealing performance of the cylinder. Summary of the Invention
[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing a fixed-clamp piston sealing structure with high sealing performance.
[0005] The objective of this utility model can be achieved through the following technical solution: A fixed clamp piston sealing structure, comprising a clamp body shell and a piston, characterized in that the rear end of the piston has a raised shaft, and the outer end of the raised shaft adopts an external thread structure, the raised shaft is threadedly connected to a pressure cap, a sealing element is provided between the piston and the clamp body shell, a sealing groove for embedding the sealing element is opened on the peripheral wall of the piston, and the longitudinal section of the sealing groove is inverted trapezoidal shape, the sealing element has a sealing lip installed in the sealing groove, and the sealing element also has a sealing pressing part pressed by the pressure cap, and a sealing front edge part located at the inner end of the sealing element has a sealing front edge part that fits on the piston and plays a sealing role between the piston and the clamp body shell, the inner ring of the sealing front edge part has a plurality of sealing lip protrusions, and an inner groove is provided between two of the sealing lip protrusions.
[0006] In the aforementioned fixed clamp piston sealing structure, a frame is provided outside the clamp body housing.
[0007] In the aforementioned fixed clamp piston sealing structure, the clamp body housing has an oil inlet end.
[0008] In the aforementioned fixed clamp piston sealing structure, there are two pistons distributed on both sides of the clamp body shell.
[0009] Compared with existing technologies, this fixed clamp piston sealing structure has the advantage of improving the installation compactness of the sealing structure and thus improving the sealing performance. Attached Figure Description
[0010] Figure 1 This is a structural diagram of the fixed clamp piston sealing structure.
[0011] Figure 2 yes Figure 1Enlarged view of point A.
[0012] In the diagram, 1. clamp body shell; 2. piston; 3. raised shaft; 4. gland; 5. sealing groove; 6. sealing lip; 7. sealing clamping part; 8. sealing front edge; 9. sealing lip; 10. inner groove; 11. frame; 12. oil inlet end. Detailed Implementation
[0013] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0014] like Figure 1-2 As shown, the clamp piston sealing structure includes a clamp body shell 1 and a piston 2. The rear end of the piston 2 has a raised shaft 3, the outer end of which adopts an external thread structure. The raised shaft 3 is threadedly connected to a pressure cap 4. A sealing element is provided between the piston 2 and the clamp body shell 1. A sealing groove 5 for the sealing element to be embedded is opened on the peripheral wall of the piston 2. The longitudinal section of the sealing groove 5 is inverted trapezoidal. The sealing element has a sealing lip 6 installed in the sealing groove 5. The sealing element also has a sealing clamping part 7 pressed by the pressure cap 4. A sealing front edge part 8 is located at the inner end of the sealing element, which fits against the piston 2 and plays a sealing role between the piston 2 and the clamp body shell 1. The inner ring of the sealing front edge part 8 has several sealing lips 9. There is an inner groove 10 between two sealing lips 9. By improving the sealing structure, the sealing structure is formed into a pressed part, an installed part, and a tight part. On the one hand, the connection compactness is improved, and on the other hand, oil leakage is prevented. Through multiple spaced sealing lips 9, a multi-layer barrier is formed to prevent oil leakage.
[0015] Preferably, a frame 11 is provided outside the clamp body shell 1.
[0016] Preferably, the clamp housing 1 has an oil inlet end 12.
[0017] Preferably, there are two pistons 2, which are distributed on both sides of the clamp body shell 1.
[0018] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
[0019] Although this document frequently uses terms such as clamp housing 1, piston 2, raised shaft 3, pressure cap 4, sealing groove 5, sealing lip 6, sealing clamping part 7, sealing leading edge part 8, sealing convex lip 9, inner groove 10, frame 11, and oil inlet end 12, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.
Claims
1. A fixed clamp piston sealing structure, comprising a clamp body shell (1) and a piston (2), characterized in that, The piston (2) has a raised shaft (3) at its rear end, and the outer end of the raised shaft (3) adopts an external thread structure. The raised shaft (3) is threadedly connected to a pressure cap (4). A sealing element is provided between the piston (2) and the clamp body shell (1). A sealing groove (5) for the sealing element to be embedded is opened on the peripheral wall of the piston (2). The longitudinal section of the sealing groove (5) is in the shape of an inverted trapezoid. The sealing element has a sealing lip (6) installed in the sealing groove (5). The sealing element also has a sealing pressing part (7) pressed by the pressure cap (4). The inner end of the sealing element has a sealing front edge part (8) that fits on the piston (2) and plays a sealing role between the piston (2) and the clamp body shell (1). The inner ring of the sealing front edge part (8) has several sealing lips (9), and there is an inner groove (10) between two sealing lips (9).
2. The fixed clamp piston sealing structure according to claim 1, characterized in that, A frame (11) is provided outside the clamp body shell (1).
3. The fixed clamp piston sealing structure according to claim 1, characterized in that, The clamp body housing (1) has an oil inlet end (12).
4. The fixed clamp piston sealing structure according to claim 1, characterized in that, The pistons (2) are two in number and are distributed on both sides of the clamp body shell (1).