A split-type hydraulic cylinder protective sleeve
Patent Information
- Application Number
- CN202610780830.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-02
- Publication Date
- 2026-08-14
AI Technical Summary
[0003]目前，油缸防护套主要有两种结构形式：一是整体式油缸防护套，其虽能包覆防护油缸杆，但检修时需借助工具松开管带式抱箍方可拆卸，拆装繁琐，不利于快速维护；二是侧向拉链式油缸防护套，其虽可侧向打开以便检修，但由于防护套本体多为波纹结构，侧向设置拉链不仅影响外观美观性，且拉链运行顺滑度差，同时拉链背侧形成观察死角，导致油缸杆背侧区域难以直接检视
[0017]本发明采用分体式结构，油缸保护套一与油缸保护套二分别固定于缸筒端和杆头端，两者通过对接端面的尼龙搭扣与暗扣实现快速开合。检修时，操作人员无需借助任何工具，仅用手力挣开暗扣并撕开尼龙搭扣，再将油缸保护套一向缸筒侧拨动，即可使油缸杆充分露出，便于直接观察渗油、磨损及刮伤情况；检查完毕后复位粘接并扣合暗扣即可恢复防护状态。相较于整体式防护套需松开管带式抱箍的繁琐操作，本发明显著提升了拆装便捷性和维护效率。
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Figure CN122565781A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hydraulic cylinder protection, and specifically to a hydraulic cylinder protective sleeve for forklifts. Background Technology
[0002] Engineering vehicles are typically equipped with hydraulic working devices consisting of cylinders, valve blocks, etc., to perform operations such as grabbing, shoveling, and steering. During operation, the cylinder rod continuously extends and retracts under the drive of hydraulic oil. External contaminants such as dust and metal shavings can easily corrode and scratch the surface of the cylinder rod, thereby affecting the cylinder's sealing performance and service life. Therefore, equipping the cylinder with a protective sleeve to isolate it from external contaminants is a necessary measure to ensure the reliable operation of the hydraulic system.
[0003] Currently, there are two main structural forms of hydraulic cylinder protective sleeves: one is the integral hydraulic cylinder protective sleeve, which can cover and protect the hydraulic cylinder rod, but during maintenance, tools are needed to loosen the hose clamp before it can be disassembled, which is cumbersome and not conducive to quick maintenance; the other is the side zipper type hydraulic cylinder protective sleeve, which can be opened to the side for maintenance, but since the protective sleeve body is mostly corrugated, the side zipper not only affects the appearance, but also has poor zipper smoothness. At the same time, the back of the zipper forms a blind spot, making it difficult to directly inspect the back area of the hydraulic cylinder rod.
[0004] Therefore, existing hydraulic cylinder protective sleeves still have significant shortcomings in terms of ease of disassembly and assembly, appearance integrity, and ease of inspection, and a more optimized protection solution is urgently needed. Summary of the Invention
[0005] The purpose of this invention is to provide a split-type hydraulic cylinder protective sleeve design, which ensures the protection of the hydraulic cylinder while allowing for easy disassembly of the protective sleeve to check for oil leaks, wear, and other issues, while also ensuring the aesthetic appearance of the hydraulic cylinder sleeve.
[0006] To achieve the above objectives, the present invention provides a split-type hydraulic cylinder protective sleeve, comprising a hydraulic cylinder protective sleeve one and a hydraulic cylinder protective sleeve two. The hydraulic cylinder protective sleeve one is used to fit and fix to the cylinder barrel end of the hydraulic cylinder, and the hydraulic cylinder protective sleeve two is used to fit and fix to the cylinder rod head. The hydraulic cylinder protective sleeve one and the hydraulic cylinder protective sleeve two are axially joined together to cover the outer periphery of the hydraulic cylinder rod, forming a continuous closed protective cavity. The end face of the hydraulic cylinder protective sleeve one facing the joining side is provided with a hook-and-loop fastener and a male concealed snap fastener, and the end face of the hydraulic cylinder protective sleeve two facing the joining side is provided with a rough hook-and-loop fastener matching the hook-and-loop fastener and a female concealed snap fastener corresponding to the position of the male concealed snap fastener. The hydraulic cylinder protective sleeve one and the hydraulic cylinder protective sleeve two form a composite connection at the joining point that combines sealing performance and mechanical connection strength through the bonding of the hook-and-loop fastener and the rough hook-and-loop fastener and the fastening of the male concealed snap fastener and the female concealed snap fastener.
[0007] Preferably, it also includes a tubular clamp, which is tightened at the connection between the first cylinder protective sleeve and the cylinder and the connection between the second cylinder protective sleeve and the cylinder rod head, so as to achieve quick fixation at both ends.
[0008] Preferably, both the first and second cylinder protective sleeves are corrugated structures, which can flexibly deform along the axial direction to adapt to the changes in the extension and retraction stroke of the cylinder rod.
[0009] Preferably, the male and female snap fasteners are evenly distributed along the circumference of the mating end face and are located on the outer periphery of the hook surface or the rough surface of the hook fastener, forming a multi-point mechanical locking structure.
[0010] Preferably, there are four male and four female snap fasteners, and their positions correspond one-to-one.
[0011] Preferably, the hook side of the nylon hook occupies the end face area of the first mating end face of the hydraulic cylinder protective sleeve, and the rough side of the nylon hook occupies the corresponding end face area of the second mating end face of the hydraulic cylinder protective sleeve, so as to form a large-area adhesive seal at the mating point.
[0012] Preferably, the snap-fit connection between the male and female snap fasteners is used to share and resist the axial tensile force on the mating surfaces of the two protective sleeves when the hydraulic cylinder extends, thus avoiding the concentration of all loads on the Velcro bonding surface.
[0013] Preferably, the male and female snap fasteners form a redundant safety mechanism. When the Velcro detaches due to fatigue or accidental factors, the male and female snap fasteners still maintain the connection between the first and second hydraulic cylinder protective sleeves.
[0014] Preferably, when the mating end faces of the first cylinder protective sleeve and the second cylinder protective sleeve approach each other along the axial direction, the hook surface of the nylon hook and the rough surface of the nylon hook first adhere to each other to form a tight and sealed connection, and then the male and female snap fasteners are fastened one by one to complete the mechanical locking.
[0015] Preferably, after the first cylinder protective sleeve and the second cylinder protective sleeve are mated, the hook surface of the nylon hook and the rough surface of the nylon hook remain tightly bonded to ensure that the mating surfaces are always in close contact and sealed during the cyclic reciprocating extension and retraction of the cylinder rod.
[0016] Compared with the prior art, the present invention has the following beneficial technical effects:
[0017] This invention adopts a split structure, with cylinder protective sleeve one and cylinder protective sleeve two fixed to the cylinder barrel end and rod end respectively. The two are quickly opened and closed via Velcro and snap fasteners on their mating surfaces. During maintenance, operators do not need any tools; they simply use their hands to pry open the snap fasteners and tear open the Velcro, then push cylinder protective sleeve one towards the cylinder barrel side to fully expose the cylinder rod, facilitating direct observation of oil leaks, wear, and scratches. After inspection, the sleeve is repositioned and the snap fasteners are fastened to restore the protective function. Compared to the cumbersome operation of loosening the hose clamp required for an integral protective sleeve, this invention significantly improves the ease of disassembly and assembly and maintenance efficiency.
[0018] This invention incorporates both Velcro and concealed fasteners on the mating surfaces, forming a composite connection system that combines flexible and rigid connections. The large-area bonding of the Velcro ensures a tight fit between the mating surfaces, effectively preventing dust and metal shavings from entering and ensuring a secure seal. The concealed fasteners distribute the axial tension generated during cylinder extension, preventing the entire load from concentrating on the Velcro and causing premature failure or detachment. Furthermore, when the Velcro fails due to fatigue from long-term cyclic operation or unexpected factors, the concealed fasteners maintain the connection between the two protective sleeves, preventing complete separation and creating a redundant safety mechanism. This significantly improves connection reliability and continuous protection.
[0019] This invention places the connecting structure on the mating end face of the two separate protective sleeves, rather than arranging it on the side. This fundamentally avoids appearance defects caused by exposed zippers and problems such as zipper slippage, making the cylinder protective sleeve more neat and beautiful. At the same time, the connection method of the mating end face eliminates the blind spot of observation on the back side of the traditional side zipper-type protective sleeve, allowing direct inspection of all sides of the cylinder rod. This facilitates timely detection and handling of abnormal conditions such as oil leakage and scratches, taking into account both appearance integrity and inspection convenience. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of a split-type hydraulic cylinder protective sleeve according to the present invention; Figure 2 For the present invention Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a schematic diagram of the nylon hook surface in a split-type hydraulic cylinder protective sleeve according to the present invention; Figure 4 This is a schematic diagram of the nylon hook-and-loop fastener surface in a split-type hydraulic cylinder protective sleeve according to the present invention.
[0021] Attached reference numerals: 1. Hydraulic cylinder protective sleeve one; 2. Hydraulic cylinder protective sleeve two; 3. Hook and loop fastener face; 4. Hook and loop fastener face; 5. Male concealed snap fastener; 6. Female concealed snap fastener; 7. Tube and strap clamp; 8. Hydraulic cylinder rod head; 9. Hydraulic cylinder rod; 10. Hydraulic cylinder. Detailed Implementation
[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] The present invention provides an integral structure for a split-type hydraulic cylinder protective sleeve as follows: Figure 1 As shown, it mainly consists of cylinder protective sleeve 1, cylinder protective sleeve 2, hook face 3, hook face 4, male concealed snap fastener 5, female concealed snap fastener 6, and tubular clamp 7. Cylinder protective sleeve 1 is fitted and fixed to the cylinder end of cylinder 10, and cylinder protective sleeve 2 is fitted and fixed to the cylinder rod head 8. The two sleeves are axially joined together to cover the outer periphery of cylinder rod 9, forming a continuous closed protective cavity to prevent external dust and iron filings from directly contacting, corroding, or scratching cylinder rod 9. To ensure reliable fixation at both ends, the tubular clamp 7 is tightened at the connection points between cylinder protective sleeve 1 and cylinder 10, and between cylinder protective sleeve 2 and cylinder rod head 8, respectively, thus firmly installing the two separate protective sleeves onto their respective bases while facilitating quick assembly and disassembly.
[0024] Combination Figure 2 and Figure 3 As shown, the end face of the hydraulic cylinder protective sleeve 1 facing the mating side is sewn with a nylon hook surface 3. This hook surface occupies the end face area and is used to form a large-area adhesive seal with the corresponding rough surface. At the same time, four concealed male buckles 5 are also circumferentially embedded on this end face. The four concealed male buckles 5 are distributed on the outer periphery of the nylon hook surface 3, forming a multi-point mechanical locking structure. Accordingly, as Figure 2 and Figure 4 As shown, the end face of the hydraulic cylinder protective sleeve 2 facing the docking side is sewn with a nylon hook fastener rough surface 4 that matches the hook surface mentioned above. On the same end face, four concealed snap fasteners 6 are also evenly distributed around the circumference, corresponding one-to-one with the positions of the male snap fastener 5. This allows the hook surface 3 and the rough surface 4 of the nylon hook fastener to fit accurately when the two protective sleeves are docked, and the male snap fastener 5 and the female snap fastener 6 to be precisely aligned.
[0025] In terms of assembly and connection, cylinder protective sleeve 1 and cylinder protective sleeve 2 approach each other axially through their respective mating end faces. First, the hook surface 3 and the rough surface 4 of the nylon hook and loop fastener are bonded together, forming a tight and sealed connection between the two separate protective sleeves at the mating point, effectively preventing external contaminants from entering the internal protective space. Subsequently, the four male and four female concealed fasteners 5 are fastened one by one to complete the mechanical locking. Thus, the soft connection of the nylon hook and the hard connection of the concealed fasteners form a composite connection system on the mating end face, which not only ensures the sealing of the mating surface but also provides sufficient mechanical connection strength.
[0026] Under normal operating conditions, the hydraulic cylinder 10 drives the cylinder rod 9 to perform cyclic reciprocating extension and retraction movements. The hydraulic cylinder protective sleeve 1 and the hydraulic cylinder protective sleeve 2 extend and retract with the relative movement of the bases at both ends. Since the protective sleeve adopts a corrugated structure, it can flexibly deform along the axial direction to adapt to changes in stroke. At this time, the hook surface 3 and the rough surface 4 of the nylon hook and loop fastener remain tightly bonded, ensuring that the mating surfaces are always in close contact and sealed, preventing dust and iron filings from entering. When the hydraulic cylinder 10 extends, causing the mating surfaces of the two protective sleeves to be subjected to an outward axial tensile force, the snap fastener male buckle 5 and the snap fastener female buckle 6 can effectively share and resist this force, avoiding the concentration of all load on the nylon hook and loop fastener bonding surface, which would cause it to fail or detach prematurely, thus significantly improving the reliability of the connection.
[0027] Furthermore, when the hydraulic cylinder 10 operates cyclically for a long time, causing the Velcro to fail and detach due to fatigue or accidental factors, the mechanical engagement of the male and female concealed fasteners 5 and 6 can still maintain the connection between the hydraulic cylinder protective sleeve 1 and the hydraulic cylinder protective sleeve 2, preventing the two separate protective sleeves from completely separating and continuing to protect the hydraulic cylinder rod 9, forming a redundant safety mechanism. When it is necessary to inspect the hydraulic cylinder 10 for oil leakage, oil seepage, or surface scratches, the operator does not need any tools. They can simply use their hands to pry open the male and female concealed fasteners 5 and 6, then tear open the hook side 3 and the rough side 4 of the Velcro, and then push the hydraulic cylinder protective sleeve 1 towards the cylinder barrel side of the hydraulic cylinder 10 to fully expose the hydraulic cylinder rod 9 for direct observation and maintenance. After the inspection is completed, the hydraulic cylinder protective sleeve 1 is reset. First, the hook side 3 and the rough side 4 of the Velcro are fully bonded, and then the four concealed fasteners are fastened one by one, restoring the hydraulic cylinder protective sleeve to its initial normal protective state.
[0028] Compared to integrated cylinder protective sleeves, the split structure of this invention achieves quick fixation at both ends through tubular clamps 7 and quick opening and closing of the mating surfaces through Velcro, eliminating the cumbersome operation of loosening the clamps. Compared to side-zippered cylinder protective sleeves, this invention places the connecting structure on the mating end face rather than on the side, avoiding appearance defects caused by exposed zippers and zipper slippage problems, while also eliminating blind spots for observation from the back side, making the inspection of the cylinder rod 9 more direct and convenient. Through the dual cooperation of Velcro and concealed fasteners, this split cylinder protective sleeve ensures comprehensive protection for the cylinder 10 and cylinder rod 9 while achieving a combination of quick and non-destructive assembly / disassembly, reliable connection, and aesthetically pleasing appearance.
[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.
Claims
1. A split-type hydraulic cylinder protective sleeve, characterized in that, Includes a cylinder protective sleeve one (1) and a cylinder protective sleeve two (2); the cylinder protective sleeve one (1) is used to fit and fix to the cylinder end of the cylinder (10), and the cylinder protective sleeve two (2) is used to fit and fix to the cylinder rod head (8); the cylinder protective sleeve one (1) and the cylinder protective sleeve two (2) are axially connected and together cover the outer periphery of the cylinder rod (9), forming a continuous closed protective cavity; the cylinder protective sleeve one (1) has a nylon hook surface (3) and a concealed male buckle (3) on the end face facing the docking side. 5) The end face of the second cylinder protective sleeve (2) facing the docking side is provided with a nylon hook hook surface (4) that matches the hook surface (3) and a concealed snap female (6) that corresponds to the position of the male snap (5); the first cylinder protective sleeve (1) and the second cylinder protective sleeve (2) are bonded together by the hook surface (3) and the hook hook surface (4) and the male snap (5) and the female snap (6), forming a composite connection with both sealing performance and mechanical connection strength at the docking point.
2. The split-type hydraulic cylinder protective sleeve according to claim 1, characterized in that, It also includes a tube-type clamp (7), which is clamped to the connection between the cylinder protective sleeve one (1) and the cylinder (10) and the connection between the cylinder protective sleeve two (2) and the cylinder rod head (8) to achieve quick fixation at both ends.
3. The split-type hydraulic cylinder protective sleeve according to claim 1, characterized in that, Both the first cylinder protective sleeve (1) and the second cylinder protective sleeve (2) are corrugated structures that can be flexibly deformed along the axial direction to adapt to the changes in the extension and retraction stroke of the cylinder rod (9).
4. A split-type hydraulic cylinder protective sleeve according to claim 1, characterized in that, The male snap fastener (5) and the female snap fastener (6) are evenly distributed along the circumference of the mating end face and are located on the outer periphery of the hook surface (3) or the rough surface (4) of the nylon hook fastener, forming a multi-point mechanical locking structure.
5. A split-type hydraulic cylinder protective sleeve according to claim 4, characterized in that, The number of the male snap fastener (5) and the female snap fastener (6) are four each, and their positions correspond one-to-one.
6. A split-type hydraulic cylinder protective sleeve according to claim 1, characterized in that, The hook side (3) of the nylon fastener occupies the end face area of the mating end face of the first cylinder protective sleeve (1), and the rough side (4) of the nylon fastener occupies the corresponding end face area of the mating end face of the second cylinder protective sleeve (2), so as to form a large-area adhesive seal at the mating point.
7. A split-type hydraulic cylinder protective sleeve according to claim 1, characterized in that, The snap-fit connection between the male snap fastener (5) and the female snap fastener (6) is used to share and resist the axial tensile force on the mating surface of the two protective sleeves when the cylinder (10) extends, so as to avoid all the load being concentrated on the nylon hook and loop fastener bonding surface.
8. A split-type hydraulic cylinder protective sleeve according to claim 1, characterized in that, The male snap fastener (5) and the female snap fastener (6) form a redundant safety mechanism. When the Velcro fastener fails and comes loose due to fatigue or accidental factors, the male snap fastener (5) and the female snap fastener (6) still maintain the connection between the cylinder protection sleeve one (1) and the cylinder protection sleeve two (2).
9. A split-type hydraulic cylinder protective sleeve according to claim 1, characterized in that, When the mating end faces of the first cylinder protective sleeve (1) and the second cylinder protective sleeve (2) approach each other along the axial direction, the hook face (3) of the nylon hook and the rough face (4) of the nylon hook first bond with each other to form a tight and sealed connection. Then the male buckle (5) of the concealed buckle and the female buckle (6) of the concealed buckle are fastened one by one to complete the mechanical locking.
10. A split-type hydraulic cylinder protective sleeve according to claim 1, characterized in that, After the first cylinder protective sleeve (1) and the second cylinder protective sleeve (2) are connected, the hook surface (3) of the nylon hook and the rough surface (4) of the nylon hook remain tightly bonded to ensure that the connecting surfaces are always in contact and sealed during the repeated extension and retraction of the cylinder rod (9).