Hydraulic cylinder with dust seal
By using a combination of hard and soft dustproof rings in the clamping assembly of the hydraulic cylinder, the problem of difficult locking of the dustproof ring is solved, achieving stable connection of the dustproof ring and extending its service life, while reducing the failure rate and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANCHENG ZHENSHENG MASCH HYDRAULIC PRESSURE CO LTD
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-28
AI Technical Summary
Existing hydraulic cylinders with dust seals have a short service life and are prone to malfunctions such as leakage, abnormal noise, and jamming due to the difficulty in locking the dust seals.
The design combines hard and soft dustproof rings. Through the clamping components, including a sliding frame, spring, rotating rod, and locking block, the dustproof ring can be stably locked and removed, ensuring a stable connection between the dustproof ring and the piston rod.
It extends the service life of the dust seal, reduces the failure rate of the hydraulic cylinder, reduces maintenance frequency and cost, and ensures accurate transmission of the pushing and pulling force of the hydraulic cylinder.
Smart Images
Figure CN224566436U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder with a dustproof ring. Background Technology
[0002] A hydraulic cylinder is an actuator that converts the pressure energy of hydraulic oil into linear motion mechanical energy. Its core consists of a cylinder barrel, piston, piston rod, and sealing system. Among them, the dustproof ring installed on the outermost side of the piston rod inlet is crucial. When the piston rod retracts, it actively scrapes and removes external contaminants such as dust, dirt, and moisture adhering to its surface, preventing these harmful substances from entering the cylinder. This avoids wear and scratches on the piston rod and the inner wall of the cylinder barrel and keeps the hydraulic oil clean.
[0003] Existing hydraulic cylinders with dust seals have dust seals that adhere tightly to the piston rod surface when the piston rod retracts, scraping away dust, sand, and other contaminants that the piston rod picks up when it extends. However, because it is difficult to lock the dust seal, the cylinder is prone to leaks, abnormal noises, and jamming, resulting in a short service life for the dust seal. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a hydraulic cylinder with a dustproof ring, aiming to improve the problem of the short service life of the dustproof ring in existing hydraulic cylinders with dustproof rings due to the difficulty in locking the dustproof ring.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A hydraulic cylinder with a dustproof ring includes a hydraulic cylinder body, a first sliding rod slidably connected inside the hydraulic cylinder body, a hard dustproof ring disposed outside the first sliding rod, the hard dustproof ring being disposed inside the hydraulic cylinder body, a disassembly groove being formed inside the hard dustproof ring, a soft dustproof ring disposed inside the hydraulic cylinder body, the soft dustproof ring being disposed outside the first sliding rod, and a clamping assembly disposed inside the hydraulic cylinder body, the clamping assembly being disposed outside the soft dustproof ring.
[0007] Preferably, the clamping assembly includes a sliding frame, a first spring, a rotating rod, and a locking block. The sliding frame is externally slidably connected to the inside of the hydraulic cylinder body. One end of the sliding frame is provided with a first spring, and one end of the first spring is provided with a locking block. The rotating rod is rotatably connected to the inside of the locking block.
[0008] Preferably, the clamping assembly further includes a fixed ring, a rotating ring, a connecting rod, a rotating plate, a locking plate, and a second spring. The fixed ring is externally fixedly connected to the inside of the hydraulic cylinder body. The rotating ring is rotatably connected to the inside of the fixed ring. The connecting rod is externally fixedly connected to the outside of the rotating ring. The top of the rotating ring is rotatably connected to the rotating plate. The locking plate is rotatably connected to the inside of the rotating plate. The second spring is provided externally on the rotating ring.
[0009] Preferably, the external rotating rod is rotatably connected to the inside of the sliding frame, and one end of the locking block is disposed outside the soft dustproof ring.
[0010] Preferably, the connecting rod is externally rotatably connected to the inside of the hydraulic cylinder body, one end of the second spring is disposed inside the fixed ring, the bottom end of the rotating plate is rotatably connected to the inside of the fixed ring, the bottom end of the locking plate is disposed at the top of the soft dustproof ring, and the outside of the rotating ring is disposed outside the soft dustproof ring.
[0011] Preferably, a support plate is fixedly connected to the outside of the hydraulic cylinder body, and a locking component is provided inside the support plate.
[0012] Preferably, the locking assembly includes a protective housing, the outer side of which is fixedly connected to the inside of the support plate, a second sliding rod is slidably connected inside the protective housing, a rotating block is fixedly connected to one end of the second sliding rod, a third spring is provided inside the protective housing, a baffle is provided at one end of the third spring, and a fixing plate is fixedly connected to the outer side of the second sliding rod.
[0013] Preferably, the outside of the second sliding rod is fixedly connected to the inside of the baffle, the outside of the baffle is disposed inside the protective housing, the bottom end of the fixed plate is disposed at one end of the protective housing, and the inside of the third spring is disposed outside the second sliding rod.
[0014] This utility model has the following beneficial effects:
[0015] 1. In this utility model, a sliding frame, a first spring, a rotating rod, and a locking block can be used. By pressing the sliding frame and driving the first spring to compress, the rotating rod rotates. Then, under the drive of the first spring and the rotating rod, the locking block slides. Alternatively, a fixed ring, a rotating ring, a connecting rod, a rotating plate, a locking plate, and a second spring can be used. By pulling the connecting rod, the rotating ring, the rotating plate, and the locking plate rotate. The fixed ring assists the rotating ring and the rotating plate in rotating. Then, under the drive of the rotating ring, the second spring is stretched and fixed inside the fixed ring. Finally, the purpose of disassembling the soft dustproof ring is achieved. After the dustproof ring is locked, its friction mode with the piston rod meets the design expectation, avoiding abnormal friction caused by loosening and extending the service life of the dustproof ring.
[0016] 2. In this utility model, the rotating block drives the second sliding rod and the fixed plate to rotate. The third spring stretches the baffle, the second sliding rod and the fixed plate to slide, so that the second sliding rod is locked inside other equipment. Finally, the purpose of quickly installing the hydraulic cylinder body is achieved, ensuring that the thrust and pull of the cylinder are accurately applied to the equipment's actuators, and reducing the problem of lag or deviation caused by movement gap. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of a hydraulic cylinder with a dustproof ring proposed in this utility model;
[0018] Figure 2 This is a partial structural diagram of the connecting rod of a hydraulic cylinder with a dustproof ring proposed in this utility model;
[0019] Figure 3 for Figure 1 Enlarged view of point A in the middle;
[0020] Figure 4 This is a partial structural diagram of a locking block for a hydraulic cylinder with a dustproof ring, as proposed in this utility model.
[0021] Figure 5 This is a partial structural diagram of the rotating plate of a hydraulic cylinder with a dustproof ring proposed in this utility model.
[0022] Figure 6 This is a partial structural diagram of the fixing plate of a hydraulic cylinder with a dustproof ring proposed in this utility model.
[0023] Legend:
[0024] 1. Hydraulic cylinder body; 2. First sliding rod; 3. Hard dustproof ring; 4. Disassembly groove; 5. Soft dustproof ring; 6. Clamping assembly; 601. Sliding frame; 602. First spring; 603. Rotating rod; 604. Locking block; 605. Fixing ring; 606. Rotating ring; 607. Connecting rod; 608. Rotating plate; 609. Locking plate; 6010. Second spring; 7. Support plate; 8. Locking assembly; 801. Protective shell; 802. Second sliding rod; 803. Rotating block; 804. Third spring; 805. Baffle; 806. Fixing plate. Detailed Implementation
[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0026] Example 1:
[0027] Reference Figures 1-3 The present invention provides an embodiment of a hydraulic cylinder with a dustproof ring, comprising a hydraulic cylinder body 1, a first sliding rod 2 slidably connected inside the hydraulic cylinder body 1, a hard dustproof ring 3 disposed outside the first sliding rod 2, the hard dustproof ring 3 disposed outside the hydraulic cylinder body 1, a disassembly groove 4 opened inside the hard dustproof ring 3, a soft dustproof ring 5 disposed inside the hydraulic cylinder body 1, the soft dustproof ring 5 disposed outside the first sliding rod 2, a clamping assembly 6 disposed inside the hydraulic cylinder body 1, and the clamping assembly 6 disposed outside the soft dustproof ring 5.
[0028] Specifically, the hydraulic cylinder body 1 is used to support and fix the hard dustproof ring 3, the soft dustproof ring 5, and the support plate 7, and to support the first sliding rod 2 to slide up and down. The hard dustproof ring 3 and the soft dustproof ring 5 are used to prevent dust and dirt on the outside of the first sliding rod 2 from entering the interior of the hydraulic cylinder body 1. The hydraulic cylinder body 1 is also used to support the clamping assembly 6 and lock the soft dustproof ring 5. Subsequently, the hydraulic cylinder body 1 is used to support and fix the support plate 7, and the support plate 7 is used to support the locking assembly 8. The locking assembly 8 is used to assist the installation of the hydraulic cylinder body 1.
[0029] Reference Figure 1 and Figure 4 The clamping assembly 6 includes a sliding frame 601, a first spring 602, a rotating rod 603 and a locking block 604. The sliding frame 601 is externally slidably connected to the inside of the hydraulic cylinder body 1. One end of the sliding frame 601 is provided with the first spring 602, and one end of the first spring 602 is provided with the locking block 604. The rotating rod 603 is rotatably connected inside the locking block 604.
[0030] Specifically, in this embodiment, pressing the sliding frame 601 compresses the first spring 602, and the hydraulic cylinder body 1 assists the sliding frame 601 in sliding. The sliding frame 601 then drives the rotating rod 603 to rotate, and the first spring 602 and the rotating rod 603 drive the locking block 604 to slide, thereby loosening the connection between the soft dustproof ring 5 and the hydraulic cylinder body 1. When not in use, the locking block 604, through its own elasticity, keeps itself tightly against the soft dustproof ring 5, preventing the connection between the soft dustproof ring 5 and the hydraulic cylinder body 1 from loosening. When pressing is complete, the first spring 602, through its own elasticity, drives the locking block 604 and the sliding frame 601 back to their original positions, thus achieving the effect of disassembling the soft dustproof ring 5, avoiding abnormal friction caused by loosening, and extending the service life of the dustproof ring.
[0031] Example 2:
[0032] Reference Figure 2 and Figure 5 The clamping assembly 6 also includes a fixed ring 605, a rotating ring 606, a connecting rod 607, a rotating plate 608, a locking plate 609, and a second spring 6010. The fixed ring 605 is externally fixedly connected to the inside of the hydraulic cylinder body 1. The rotating ring 606 is rotatably connected inside the fixed ring 605. The connecting rod 607 is fixedly connected to the outside of the rotating ring 606. The rotating plate 608 is rotatably connected to the top of the rotating ring 606. The locking plate 609 is rotatably connected inside the rotating plate 608. The outside of the rotating ring 606... A second spring 6010 is provided; the outside of the rotating rod 603 is rotatably connected to the inside of the sliding frame 601, and one end of the locking block 604 is located outside the soft dustproof ring 5; the outside of the connecting rod 607 is rotatably connected to the inside of the hydraulic cylinder body 1, one end of the second spring 6010 is located inside the fixed ring 605, the bottom end of the rotating plate 608 is rotatably connected to the inside of the fixed ring 605, the bottom end of the locking plate 609 is located at the top of the soft dustproof ring 5, and the outside of the rotating ring 606 is located outside the soft dustproof ring 5;
[0033] Specifically, in this embodiment, the rotating connecting rod 607 drives the rotating ring 606 to rotate, and the fixing ring 605 assists the rotating ring 606 in rotating. The fixing ring 605 is fixed inside the hydraulic cylinder body 1. The rotating ring 606 then drives the rotating plate 608 and the locking plate 609 to rotate, loosening the connection between the soft dustproof ring 5 and the hydraulic cylinder body 1. The fixing ring 605 assists the rotating plate 608 in rotating. However, the fixing ring 605 also fixes the second spring 6010, and the second spring 6010 assists... The rotating ring 606 rotates, and the second spring 6010 drives the rotating ring 606 to rotate, which in turn drives the rotating plate 608 and the locking plate 609 to lock the soft dustproof ring 5, making the connection more stable. When the connecting rod 607 is pulled, the second spring 6010 will drive the rotating ring 606, the rotating plate 608 and the locking plate 609 to slide back to their original positions, thereby achieving the effect of disassembling the soft dustproof ring 5. After the dustproof ring is stably locked, the failure rate of the hydraulic cylinder is significantly reduced, and there is no need for frequent shutdown for maintenance, reducing maintenance time and parts replacement costs.
[0034] Example 3:
[0035] Reference Figure 1 , Figure 2 and Figure 6A support plate 7 is fixedly connected to the outside of the hydraulic cylinder body 1, and a locking assembly 8 is provided inside the support plate 7. The locking assembly 8 includes a protective shell 801, which is fixedly connected to the outside of the support plate 7. A second sliding rod 802 is slidably connected inside the protective shell 801. A rotating block 803 is fixedly connected to one end of the second sliding rod 802. A third spring 804 is provided inside the protective shell 801. A baffle 805 is provided at one end of the third spring 804. A fixing plate 806 is fixedly connected to the outside of the second sliding rod 802. The outside of the second sliding rod 802 is fixedly connected to the inside of the baffle 805. The outside of the baffle 805 is located inside the protective shell 801. The bottom end of the fixing plate 806 is located at one end of the protective shell 801. The inside of the third spring 804 is located outside the second sliding rod 802.
[0036] Specifically, rotating the rotating block 803 drives the second sliding rod 802, the baffle 805, and the fixed plate 806 to rotate. The protective shell 801 supports the sliding of the second sliding rod 802 and the baffle 805 and provides guidance for them. Then, driven by the third spring 804, the second sliding rod 802 slides with the baffle 805. When the rotating block 803 is not rotated, the third spring 804 pushes the baffle 805 and the second sliding rod 802 outward through its own elasticity, and prevents the connection between the second sliding rod 802 and the other devices from becoming loose. This achieves the effect of quick installation of the hydraulic cylinder body 1 and effectively reduces the problem of lag or offset caused by movement gap.
[0037] Working principle: When the soft dustproof ring 5 needs to be replaced, firstly, use a tool to remove the hard dustproof ring 3 through the disassembly slot 4. Then, press the sliding bracket 601 to compress the first spring 602, which in turn rotates the rotating rod 603, causing the locking block 604 to slide, thereby locking and unlocking the soft dustproof ring 5. Then, use a tool to remove the soft dustproof ring 5. Alternatively, the rotating ring 606 can be rotated by rotating the connecting rod 607, which will also rotate the rotating plate 608 and the locking plate 609. The fixed ring 605 assists the rotating plate 608 in rotating, and the second spring 6010 assists the rotating ring 606 in rotating, thereby locking and unlocking the soft dustproof ring 5. Then, use a tool to remove the soft dustproof ring 5. This achieves the effect of removing the soft dustproof ring 5. After the dustproof ring is locked, its friction with the piston rod meets the design expectations, avoiding abnormal friction caused by loosening and extending the service life of the dustproof ring.
[0038] When installing the hydraulic cylinder body 1, a mounting hole needs to be made inside the mounting plate. By rotating the rotating block 803, the second sliding rod 802 is driven to slide, which in turn drives the baffle 805 to rotate, causing the fixed plate 806 to rotate. At the same time, the third spring 804 is stretched, and the rotating block 803, the second sliding rod 802, and the baffle 805 slide synchronously. This protects the outer shell 801, assists the second sliding rod 802 in sliding with the baffle 805, and provides a guiding function. However, the second sliding rod 802 needs to enter the mounting hole to lock the hydraulic cylinder and prevent it from shaking during use. This achieves the effect of quick installation of the hydraulic cylinder body 1, effectively ensuring that the thrust and pull of the cylinder are accurately applied to the equipment's actuators and reducing the problem of lag or offset caused by movement gaps.
[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A hydraulic cylinder with a dustproof ring, comprising a hydraulic cylinder body (1), characterized in that: The hydraulic cylinder body (1) is internally slidably connected to a first sliding rod (2). A hard dustproof ring (3) is provided on the outside of the first sliding rod (2). The hard dustproof ring (3) is located inside the hydraulic cylinder body (1). A disassembly groove (4) is provided inside the hard dustproof ring (3). The hydraulic cylinder body (1) is provided with a soft dustproof ring (5). The soft dustproof ring (5) is located outside the first sliding rod (2). A clamping assembly (6) is provided inside the hydraulic cylinder body (1). The clamping assembly (6) is located outside the soft dustproof ring (5).
2. A hydraulic cylinder with a dustproof ring according to claim 1, characterized in that: The clamping assembly (6) includes a sliding frame (601), a first spring (602), a rotating rod (603), and a locking block (604). The sliding frame (601) is externally slidably connected to the inside of the hydraulic cylinder body (1). One end of the sliding frame (601) is provided with the first spring (602), and one end of the first spring (602) is provided with the locking block (604). The rotating rod (603) is rotatably connected inside the locking block (604).
3. A hydraulic cylinder with a dustproof ring according to claim 1, characterized in that: The clamping assembly (6) further includes a fixed ring (605), a rotating ring (606), a connecting rod (607), a rotating plate (608), a locking plate (609), and a second spring (6010). The fixed ring (605) is fixedly connected to the outside of the hydraulic cylinder body (1). The rotating ring (606) is rotatably connected to the inside of the fixed ring (605). The connecting rod (607) is fixedly connected to the outside of the rotating ring (606). The rotating plate (608) is rotatably connected to the top of the rotating ring (606). The locking plate (609) is rotatably connected to the inside of the rotating plate (608). The second spring (6010) is provided on the outside of the rotating ring (606).
4. A hydraulic cylinder with a dustproof ring according to claim 2, characterized in that: The rotating rod (603) is externally rotatably connected to the inside of the sliding frame (601), and one end of the locking block (604) is located outside the soft dustproof ring (5).
5. A hydraulic cylinder with a dustproof ring according to claim 3, characterized in that: The connecting rod (607) is rotatably connected to the inside of the hydraulic cylinder body (1). One end of the second spring (6010) is located inside the fixed ring (605). The bottom end of the rotating plate (608) is rotatably connected to the inside of the fixed ring (605). The bottom end of the locking plate (609) is located at the top of the soft dustproof ring (5). The outside of the rotating ring (606) is located outside the soft dustproof ring (5).
6. A hydraulic cylinder with a dustproof ring according to claim 1, characterized in that: The hydraulic cylinder body (1) is externally fixedly connected to a support plate (7), and a locking component (8) is provided inside the support plate (7).
7. A hydraulic cylinder with a dustproof ring according to claim 6, characterized in that: The locking assembly (8) includes a protective housing (801), the outside of which is fixedly connected to the inside of the support plate (7). A second sliding rod (802) is slidably connected inside the protective housing (801). A rotating block (803) is fixedly connected to one end of the second sliding rod (802). A third spring (804) is provided inside the protective housing (801). A baffle (805) is provided at one end of the third spring (804). A fixing plate (806) is fixedly connected to the outside of the second sliding rod (802).
8. A hydraulic cylinder with a dustproof ring according to claim 7, characterized in that: The second sliding rod (802) is fixedly connected to the inside of the baffle (805), the outside of the baffle (805) is disposed inside the protective shell (801), the bottom end of the fixing plate (806) is disposed at one end of the protective shell (801), and the inside of the third spring (804) is disposed outside the second sliding rod (802).