A hydraulic cylinder with anti-leakage structure

Abstract

The present invention relates to the technical field of hydraulic cylinders, specifically to a hydraulic cylinder with an anti-leakage structure, comprising a hydraulic cylinder body, a piston shaft movably connected to the top of the hydraulic cylinder body, a connecting disc 1 sleeved on the shaft of the piston shaft, the connecting disc 1 fixed to the top of the hydraulic cylinder body, a connecting disc 2 at one end of the piston shaft, a bolt hole opened on the surface of the connecting disc 2, a sealing disc plugged into the surface of the connecting disc 1, and a sealing ring provided at the inner ring of the sealing disc; the beneficial effect is: the hydraulic cylinder with an anti-leakage structure proposed by the present invention realizes a tight seal between the piston shaft and the connecting disc 1 by plugging the sealing disc into the surface of the connecting disc 1 and providing a sealing ring at the inner ring of the sealing disc. The sealing ring is clamped between the piston shaft and the sealing disc, effectively preventing the oil inside the hydraulic cylinder body from leaking out.

Description

Technical Field

[0001] The invention relates to the field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with an anti-leakage structure. Background Art

[0002] In the hydraulic transmission system, the hydraulic cylinder is a key power conversion and execution element, and its performance directly affects the stability and reliability of the entire system. During the long-term use of traditional hydraulic cylinders, due to the unreasonable design of the sealing structure between the piston shaft and the cylinder body or the aging of materials, the problem of oil leakage is easy to occur, which not only causes the waste of oil, but also may pollute the surrounding environment and even affect the normal operation of the hydraulic cylinder.

[0003] In order to solve the above problems, various hydraulic cylinders with anti-leakage structures have appeared in the prior art. However, these hydraulic cylinders still have deficiencies in anti-leakage effect, installation convenience, and maintenance cost. For example, some hydraulic cylinders use complex sealing structures, which improve the anti-leakage performance to a certain extent, but increase the difficulty of installation and maintenance; while other hydraulic cylinders use simple sealing methods, which are easy to install but have unsatisfactory anti-leakage effect.

[0004] Therefore, developing a hydraulic cylinder that has good anti-leakage effect and is easy to install and maintain has become a technical problem that needs to be urgently solved in the current field of hydraulic transmission systems. Summary of the invention

[0005] The object of the present invention is to provide a hydraulic cylinder with an anti-leakage structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic cylinder with an anti-leakage structure, comprising a hydraulic cylinder body, a piston shaft movably connected to the top of the hydraulic cylinder body, a connecting plate 1 is sleeved on the shaft body of the piston shaft, the connecting plate 1 is fixed to the top of the hydraulic cylinder body, a connecting plate 2 is provided at one end of the piston shaft, a bolt hole is opened on the surface of the connecting plate 2, a sealing plate is inserted into the surface of the connecting plate 1, a sealing ring is provided at the inner ring mouth of the sealing plate, the sealing ring is clamped between the piston shaft and the sealing plate, an elastic cover is provided on the surface of the sealing plate, a connecting ring is fixed to one end of the elastic cover, a rubber plug strip is fixed to the surface of the connecting ring, the rubber plug strip is inserted into the bolt hole, and a through hole is opened on the surface of the connecting ring, and the through hole corresponds to the bolt hole.

[0007] Preferably, the top surface of the connecting disk 1 is provided with an embedding groove in the form of an annular groove, the sealing disk is inserted into the embedding groove, the surface of the sealing disk is threaded with screws, and the screws penetrate the sealing disk and are threaded on the surface of the embedding groove.

[0008] Preferably, the inner ring surface of the sealing disk is provided with an embedded groove, which is an annular groove, and the outer ring surface of the sealing ring is fixed in the embedded groove. The inner ring diameter of the sealing ring is smaller than the inner ring diameter of the sealing disk, and the thickness of the sealing ring is smaller than the height of the embedded groove.

[0009] Preferably, a receiving groove is provided on the top surface of the sealing disk, and the receiving groove is an annular groove. The connecting ring is a "convex" shaped circular ring plate. Rubber rings are fixed on the inner ring mouth of the bottom end of the connecting ring and the outer ring surface of the bottom end of the connecting ring. After the bottom end of the connecting ring is inserted into the receiving groove, the rubber ring is clamped between the receiving groove and the connecting ring to produce elastic deformation.

[0010] Preferably, a connecting handle is fixed to the top end of the piston shaft, a sleeve is sleeved on the top end of the connecting handle, the sleeve is fixed to the bottom surface of the second connecting plate, and the surfaces of the connecting handle and the sleeve are provided with through holes, and bolts are inserted into the multiple through holes.

[0011] Preferably, the perforation is in a trapezoidal shape, and the diameter of the perforation decreases from bottom to top.

[0012] Preferably, the rubber plug strip is an "L"-shaped strip, and a plurality of rubber plug strips are provided, and the plurality of rubber plug strips are arranged in a circular shape around the top edge of the embedding groove.

[0013] Preferably, the height of the rubber plug strip is greater than the height of the bolt hole, and after the rubber plug strip passes through the bolt hole, the top end of the rubber plug strip overlaps the top surface of the second connecting plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The hydraulic oil cylinder with anti-leakage structure proposed by the present invention realizes tight sealing between the piston shaft and the connecting disk one by inserting the sealing disk on the surface of the connecting disk one and arranging the sealing ring at the inner ring mouth of the sealing disk. The sealing ring is clamped between the piston shaft and the sealing disk, which effectively prevents the oil body inside the hydraulic oil cylinder body from leaking out. The surface of the sealing disk is provided with an elastic cover and a connecting ring, and the surface of the connecting ring is fixed with a rubber plug strip. When the connecting disk two is fixed on the equipment to be lifted by the screw structure, the rubber plug strip is clamped between the screw and the bolt hole, and the anti-drop reinforcement after the screw is locked is realized. This design improves the safety and stability of the hydraulic oil cylinder during use. The connecting ring and the sealing disk are used in combination. When not installed, the bottom end of the connecting ring can be inserted into the receiving groove, and the elastic cover can be folded and inserted into the receiving groove, so as to avoid the problem of the connecting ring falling off on the sealing disk. When installing, it is only necessary to remove the bolts first, remove the sleeve from the top of the connecting handle, and then sleeve the sealing disk and the connecting ring on the piston shaft, and then sleeve the sleeve on the connecting handle and fix it by bolts. This design simplifies installation steps and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a top view of the structure of the present invention;

[0018] Figure 3 for Figure 2 Structural cross-section view at AA in the middle;

[0019] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0021] Figure 6 for Figure 4 A magnified schematic diagram of the structure at C in the middle;

[0022] Figure 7 This is a schematic diagram of the connection structure of the sealing disk and the connection ring of the present invention;

[0023] Figure 8 for Figure 7 Front view of the middle structure;

[0024] Fig. 9 for Figure 8 Structural cross-section view at the middle BB;

[0025] Fig.10 It is a schematic diagram of the sealing disk structure of the present invention.

[0026] In the figure: hydraulic cylinder body 1, connecting plate 1 2, piston shaft 3, connecting handle 4, sleeve 5, connecting plate 2 6, through hole 7, bolt 8, embedding groove 9, sealing plate 10, embedded groove 11, sealing ring 12, screw 13, storage groove 14, elastic cover 15, connecting ring 16, rubber ring 17, bolt hole 18, through hole 19, rubber plug strip 20. DETAILED DESCRIPTION

[0027] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 10The present invention provides a technical solution: a hydraulic cylinder with an anti-leakage structure, comprising a hydraulic cylinder body 1, a piston shaft 3 is movably connected to the top of the hydraulic cylinder body 1, a connecting plate 2 is sleeved on the shaft body of the piston shaft 3, the connecting plate 2 is fixed to the top of the hydraulic cylinder body 1, one end of the piston shaft 3 is provided with a connecting plate 2 6, a connecting handle 4 is fixed to the top of the piston shaft 3, a sleeve 5 is sleeved on the top of the connecting handle 4, the sleeve 5 is fixed to the bottom surface of the connecting plate 2 6, the surfaces of the connecting handle 4 and the sleeve 5 are both provided with through holes 7, bolts 8 are inserted into the plurality of through holes 7, the surface of the connecting plate 2 6 is provided with bolt holes 18, and the surface of the connecting plate 2 A sealing disk 10 is inserted, and a sealing ring 12 is provided at the inner ring mouth of the sealing disk 10. The sealing ring 12 is clamped between the piston shaft 3 and the sealing disk 10. An embedding groove 9 is provided on the top surface of the connecting disk 2, and the embedding groove 9 is an annular groove. The sealing disk 10 is inserted in the embedding groove 9. A screw 13 is screwed on the surface of the sealing disk 10. The screw 13 penetrates the sealing disk 10 and is screwed on the surface of the embedding groove 9. An inner ring surface of the sealing disk 10 is provided with an embedded groove 11, and the embedded groove 11 is an annular groove. The outer ring surface of the sealing ring 12 is fixed in the embedded groove 11. The inner ring diameter of the sealing ring 12 is smaller than the inner ring diameter of the sealing disk 10, and the thickness of the sealing ring 12 is smaller than the height of the embedded groove 11.

[0029] When in use, after the sealing disk 10 is pushed into the embedding groove 9, the sealing disk 10 is fixed in the embedding groove 9 by means of the screw 13. At this time, the sealing ring 12 is clamped between the sealing disk 10 and the piston shaft 3 to achieve the sealing of the piston shaft 3 and the connecting disk 2, thereby preventing the oil inside the hydraulic cylinder body 1 from leaking out.

[0030] An elastic cover 15 is provided on the surface of the sealing disk 10, a connecting ring 16 is fixed at one end of the elastic cover 15, a rubber plug strip 20 is fixed on the surface of the connecting ring 16, the rubber plug strip 20 is inserted in the bolt hole 18, and a through hole 19 is provided on the surface of the connecting ring 16, the through hole 19 corresponds to the bolt hole 18, a receiving groove 14 is provided on the top surface of the sealing disk 10, the receiving groove 14 is an annular groove, the connecting ring 16 is a "convex" shaped circular ring plate, and a rubber ring 17 is fixed on the inner ring opening at the bottom end of the connecting ring 16 and the outer ring surface at the bottom end of the connecting ring 16. After the bottom end of the connecting ring 16 is inserted into the receiving groove 14, the rubber ring 17 is clamped between the receiving groove 14 and the connecting ring 16 to produce elastic deformation; the through hole 19 is a conical opening, and the aperture of the through hole 19 decreases from bottom to top; the rubber plug strip 20 is an "L"-shaped strip, and there are multiple rubber plug strips 20, and the multiple rubber plug strips 20 are arranged in a circular shape around the top edge of the embedding groove 9; the height of the rubber plug strip 20 is greater than the height of the bolt hole 18. After the rubber plug strip 20 passes through the bolt hole 18, the top end of the rubber plug strip 20 overlaps the top surface of the connecting plate 2 6. During use, when the hydraulic cylinder body 1 is in normal use, the connecting ring 16 is placed under the connecting disk 26, and the rubber plug 20 is inserted into the bolt hole 18. When the connecting disk 26 is fixed to the equipment that needs to be lifted through the screw structure, the screw passes through the through hole 19 and the bolt hole 18. At this time, the rubber plug 20 is clamped between the screw and the bolt hole 18 to achieve anti-slip reinforcement after the screw is locked; when the piston shaft 3 is in the return state, the elastic cover 15 is in the folded state. After the piston shaft 3 is lifted, the connecting ring 16 tensions the elastic cover 15 to deform, and the elastic cover 15 is always protected on the outside of the piston shaft 3 to prevent external dust from adhering to the shaft body of the piston shaft 3 and mixing with the oil body to cause dirt.

[0031] The connecting ring 16 and the sealing disk 10 are used in combination. When the connecting ring 16 and the sealing disk 10 are not installed, the bottom end of the connecting ring 16 is inserted into the receiving groove 14, the elastic cover 15 is folded and inserted into the receiving groove 14, and the rubber ring 17 is clamped between the connecting ring 16 and the receiving groove 14 to prevent the connecting ring 16 from falling off the sealing disk 10; when installing the sealing disk 10 and the connecting ring 16, it is necessary to first remove the bolts 8 and remove the sleeve 5 from the top of the connecting handle 4, and then put the sealing disk 10 and the connecting ring 16 on the piston shaft 3, and then put the sleeve 5 on the connecting handle 4, connect and fix the connecting handle 4 and the sleeve 5 by the bolts 8, and then put the connecting ring 16 under the connecting disk 6, and install the sealing disk 10 in the embedding groove 9.

[0032] The following is the detailed use process of the hydraulic cylinder:

[0033] Confirm that the hydraulic cylinder body 1, piston shaft 3, connecting plate 1 2, connecting plate 2 6, connecting handle 4, sleeve 5 and other parts are intact. Check whether the anti-leakage components such as sealing ring 12, screw 13, sealing plate 10, elastic cover 15, connecting ring 16 are complete and have no obvious damage.

[0034] Align the embedded groove 11 on the inner ring surface of the sealing disc 10 with the piston shaft 3, and ensure that the outer ring surface of the sealing ring 12 is fixed in the embedded groove 11. Insert the sealing disc 10 into the embedding groove 9 of the connecting disc 2, and ensure that the sealing ring 12 is clamped between the piston shaft 3 and the sealing disc 10. Use the screw 13 to penetrate the sealing disc 10 and then screw it on the surface of the embedding groove 9 to fix the sealing disc 10. Insert the bottom end of the connecting ring 16 into the receiving groove 14 of the sealing disc 10, and ensure that the rubber ring 17 is clamped between the receiving groove 14 and the connecting ring 16. The elastic cover 15 should be in a folded state at this time, and clamped by the connecting ring 16 and the sealing disc 10. Pass the piston shaft 3 through the connecting disc 2, and ensure that the connecting disc 2 is fixed to the top of the hydraulic cylinder body 1. Fix the connecting handle 4 to the top of the piston shaft 3, and then put the sleeve 5 on the connecting handle 4. Ensure that the through holes 7 on the surfaces of the connecting handle 4 and the sleeve 5 are aligned, and use the bolt 8 to connect and fix the two. Place the connecting plate 26 on top of the sleeve 5, and ensure that the bolt hole 18 of the connecting plate 26 corresponds to the through hole 7 on the sleeve 5 and the connecting handle 4. At this time, the connecting ring 16 should be against the bottom of the connecting plate 26, and the rubber plug strip 20 should be inserted into the bolt hole 18. Gently shake the hydraulic cylinder to check whether the sealing ring 12 and the sealing plate 10 are firmly installed without oil leakage. Ensure that the rubber plug strip 20 is tightly inserted into the bolt hole 18 without looseness. In a safe environment, start the hydraulic cylinder and test the lifting function of the piston shaft 3. Observe whether the elastic cover 15 deforms normally with the lifting of the piston shaft 3 during the lifting process of the piston shaft 3, and always protects the outside of the piston shaft 3. Check whether the elastic cover 15 is in a folded state when the piston shaft 3 is in the return state; after the piston shaft 3 is lifted, whether the connecting ring 16 stretches the elastic cover 15 to deform. Use a screw to pass through the through hole 19 and the bolt hole 18 to fix the connecting plate 26 on the equipment that needs to be lifted. Check whether the rubber plug strip 20 is clamped between the screw and the bolt hole 18 to achieve the anti-drop reinforcement after the screw is locked. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with an anti-leakage structure, comprising a hydraulic cylinder body (1), the top of the hydraulic cylinder body (1) is movably connected to a piston shaft (3), a connecting plate (2) is sleeved on the shaft of the piston shaft (3), the connecting plate (2) is fixed to the top of the hydraulic cylinder body (1), one end of the piston shaft (3) is provided with a connecting plate (6), the surface of the connecting plate (6) is provided with a bolt hole (18), characterized in that: A sealing disk (10) is inserted into the surface of the connecting disk (2), a sealing ring (12) is provided at the inner ring of the sealing disk (10), the sealing ring (12) is clamped between the piston shaft (3) and the sealing disk (10), an elastic cover (15) is provided on the surface of the sealing disk (10), a connecting ring (16) is fixed at one end of the elastic cover (15), a rubber plug strip (20) is fixed on the surface of the connecting ring (16), the rubber plug strip (20) is inserted into the bolt hole (18), and a through hole (19) is opened on the surface of the connecting ring (16), and the through hole (19) corresponds to the bolt hole (18).

2. The hydraulic cylinder with an anti-leakage structure according to claim 1, characterized in that: The top surface of the connecting disk 1 (2) is provided with an embedding groove (9), the embedding groove (9) is an annular groove, the sealing disk (10) is inserted into the embedding groove (9), the surface of the sealing disk (10) is screwed with a screw (13), and the screw (13) penetrates the sealing disk (10) and is screwed to the surface of the embedding groove (9).

3. The hydraulic cylinder with an anti-leakage structure according to claim 1, characterized in that: The inner ring surface of the sealing disk (10) is provided with an embedded groove (11), the embedded groove (11) is an annular groove, the outer ring surface of the sealing ring (12) is fixed in the embedded groove (11), the inner ring diameter of the sealing ring (12) is smaller than the inner ring diameter of the sealing disk (10), and the thickness of the sealing ring (12) is smaller than the height of the embedded groove (11).

4. The hydraulic cylinder with an anti-leakage structure according to claim 1, characterized in that: The top surface of the sealing disk (10) is provided with a receiving groove (14), which is an annular groove. The connecting ring (16) is a convex circular ring plate. A rubber ring (17) is fixed to the inner ring opening at the bottom end of the connecting ring (16) and the outer ring surface at the bottom end of the connecting ring (16). After the bottom end of the connecting ring (16) is inserted into the receiving groove (14), the rubber ring (17) is clamped between the receiving groove (14) and the connecting ring (16) to generate elastic deformation.

5. The hydraulic cylinder with an anti-leakage structure according to claim 1, characterized in that: A connecting handle (4) is fixed to the top end of the piston shaft (3), a sleeve (5) is sleeved on the top end of the connecting handle (4), the sleeve (5) is fixed to the bottom surface of the second connecting plate (6), and the surfaces of the connecting handle (4) and the sleeve (5) are both provided with through holes (7), and bolts (8) are inserted into the plurality of through holes (7).

6. The hydraulic cylinder with an anti-leakage structure according to claim 1, characterized in that: The through hole (19) is in a conical shape, and the diameter of the through hole (19) decreases from bottom to top.

7. The hydraulic cylinder with an anti-leakage structure according to claim 1, characterized in that: The rubber plug strip (20) is in an "L" shape. A plurality of rubber plug strips (20) are provided, and the plurality of rubber plug strips (20) are arranged in a circular shape around the top edge of the embedding groove (9).

8. The hydraulic cylinder with an anti-leakage structure according to claim 7, characterized in that: The height of the rubber plug strip (20) is greater than the height of the bolt hole (18). After the rubber plug strip (20) passes through the bolt hole (18), the top end of the rubber plug strip (20) overlaps the top surface of the second connecting plate (6).

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