Single-rod piston hydraulic cylinder with good sealing performance

Abstract

The utility model relates to a single-rod piston hydraulic cylinder with good sealing performance, which belongs to the technical field of hydraulic cylinders and comprises a hydraulic cylinder barrel and a hydraulic cylinder head, and a sealing mechanism is arranged between the hydraulic cylinder barrel and the hydraulic cylinder head and comprises a sealing sleeve fixedly mounted in the hydraulic cylinder barrel. A limiting ring, a sealing ring and a sealing ring are arranged in the sealing sleeve, and a sealing washer is fixedly installed in the hydraulic cylinder head. According to the single-rod piston hydraulic cylinder with the good sealing performance, the sealing sleeve is arranged in the hydraulic cylinder barrel, the sealing ring and the sealing ring are arranged in the sealing sleeve, and when the single-rod piston hydraulic cylinder is used, the sealing sleeve, the sealing ring and the sealing ring can be used for sealing the internal connecting position of the piston rod and the hydraulic cylinder barrel; the sealing gasket and the compensation ring can be used for sealing the external connecting position of the piston rod and the hydraulic cylinder barrel, so that the sealing performance of the hydraulic cylinder is improved, and the problems that in the prior art, the sealing performance of a hydraulic cylinder head is poor, and liquid leakage is prone to occurring are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder technical field, concretely is a single rod piston hydraulic cylinder with good sealing performance. BACKGROUND

[0002] Single rod piston hydraulic cylinder is a common hydraulic transmission element, which is composed of a piston, a piston rod, a cylinder body, a sealing element and the like, and its working principle is that a linear motion force is generated on the piston by the pressure of hydraulic oil, and the single rod piston hydraulic cylinder has the advantages of simple structure, convenient installation, stable operation, high reliability and long service life, and is suitable for various engineering machinery, metallurgical equipment, ships, hoisting machinery and the like.

[0003] The utility model discloses a kind of cylinder heads with good sealing performance for hydraulic cylinder, including cylinder body, cylinder head and cylinder cover, the cylinder head top extends to left and right sides, the bottom of the extending end of the cylinder head is connected with plugboard on left and right sides, the plugboard is matched with the plugboard in the inside of the cylinder body left and right side walls and is longitudinally provided with slot, the slot is communicated with plugboard, the plugboard inner bottom is equipped with spring and slide base, the both ends of the spring are respectively connected with plugboard inner wall and slide base, the utility model is equipped with two sealing rings in the slot in cylinder head, the inner wall of two sealing rings is attached with the outer wall of piston rod, plays the role of double sealing, can effectively avoid liquid from cylinder body seepage, sealing pad is equipped at the connecting place of cylinder body top and cylinder head extending end bottom, plays the role of sealing, prevents liquid from connecting place outflow, and sealing performance is good.

[0004] The above-mentioned patent improves the poor sealing performance of the cylinder head of the hydraulic cylinder in the prior art, which is prone to liquid leakage. The present application provides another embodiment to solve the problems in the above-mentioned patent. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a single rod piston hydraulic cylinder with good sealing performance, which has the advantage of good sealing performance and solves the problem of poor sealing performance of the cylinder head of the hydraulic cylinder in the prior art, which is prone to liquid leakage.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a single rod piston hydraulic cylinder with good sealing performance, comprising a hydraulic cylinder barrel and a hydraulic cylinder head, a sealing mechanism is arranged between the hydraulic cylinder barrel and the hydraulic cylinder head.

[0007] The sealing mechanism comprises a sealing sleeve fixedly installed in the interior of the hydraulic cylinder barrel, a limiting ring, a sealing ring and a sealing ring are arranged in the sealing sleeve, a sealing washer is fixedly installed in the interior of the hydraulic cylinder head, a compensation ring is fixedly installed on the inner side surface of the sealing washer, a first connecting ring is fixedly installed on the outer surface of the hydraulic cylinder barrel, an extension protection sleeve is fixedly installed on the surface of the first connecting ring, a piston is movably installed in the interior of the hydraulic cylinder barrel, a piston rod extending through the sealing sleeve and extending to the outside of the hydraulic cylinder barrel is fixedly installed on the surface of the piston, and the second connecting ring is fixedly connected with one end of the extension protection sleeve.

[0008] Further, the number of the limiting rings is four, and every two limiting rings form a group.

[0009] Further, the number of the sealing ring and the sealing ring is two, and every two limiting rings limit one of the sealing ring and the sealing ring.

[0010] Further, the sealing ring is provided with an opening on the surface.

[0011] Further, the sealing ring and the sealing ring are sleeved on the surface of the piston rod and in contact with the surface of the piston rod.

[0012] Further, the piston rod is located in the inner side of the compensation ring and in contact with the compensation ring.

[0013] Further, the hydraulic cylinder head is screw-connected to the top of the hydraulic cylinder barrel, and the piston rod penetrates through the hydraulic cylinder head.

[0014] Compared with the prior art, the technical scheme has the following beneficial effects:

[0015] The single-rod piston hydraulic cylinder with good sealing performance is provided with a sealing sleeve in the interior of the hydraulic cylinder barrel, a sealing ring and a sealing ring are arranged in the sealing sleeve, the sealing sleeve, the sealing ring and the sealing ring can be used to seal the connection between the piston rod and the interior of the hydraulic cylinder barrel during use, the sealing washer and the compensation ring can be used to seal the connection between the piston rod and the exterior of the hydraulic cylinder barrel, and therefore the sealing performance of the hydraulic cylinder is improved, and the problem of easy liquid leakage of the hydraulic cylinder head in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an internal schematic view of the hydraulic cylinder barrel of the utility model structure.

[0017] Figure 2 It is the utility model structure Figure 1 It is an enlarged structural schematic view of position A in the utility model.

[0018] Figure 3 It is a schematic view of the sealing ring of the utility model structure.

[0019] Fig. 1, hydraulic cylinder barrel; 2, hydraulic cylinder head; 3, sealing sleeve; 4, limiting ring; 5, sealing ring; 6, sealing ring; 7, sealing washer; 8, compensation ring; 9, first connecting ring; 10, telescopic protective sleeve; 11, piston; 12, piston rod; 13, second connecting ring; 14, notch. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figures 1 to 3 The single-rod piston hydraulic cylinder with good sealing property in the embodiment comprises a hydraulic cylinder barrel 1 and a hydraulic cylinder head 2, a sealing mechanism is arranged between the hydraulic cylinder barrel 1 and the hydraulic cylinder head 2, the sealing mechanism comprises a sealing sleeve 3 fixedly installed inside the hydraulic cylinder barrel 1, limiting rings 4, sealing rings 5 and sealing rings 6 are arranged in the sealing sleeve 3, the number of the limiting rings 4 is four, every two limiting rings 4 form a group, the number of the sealing rings 5 and the sealing rings 6 is two, every two limiting rings 4 limit one of the sealing rings 5 and the sealing rings 6, notches 14 are arranged on the surface of the sealing rings 5, a sealing washer 7 is fixedly installed inside the hydraulic cylinder head 2, a compensation ring 8 is fixedly installed on the inner surface of the sealing washer 7, a first connecting ring 9 is fixedly installed on the outer surface of the hydraulic cylinder barrel 1, a telescopic protective sleeve 10 is fixedly installed on the surface of the first connecting ring 9, a piston 11 is movably installed inside the hydraulic cylinder barrel 1, a piston rod 12 is fixedly installed on the surface of the piston 11 and extends to the outside of the hydraulic cylinder barrel 1 through the sealing sleeve 3, a second connecting ring 13 is fixedly installed on the surface of the piston rod 12, one end of the telescopic protective sleeve 10 is fixedly connected with the second connecting ring 13, the sealing rings 5 and the sealing rings 6 are sleeved on the surface of the piston rod 12 and are in contact with the surface of the piston rod 12, the piston rod 12 is located inside the compensation ring 8 and is in contact with the compensation ring 8, the hydraulic cylinder head 2 is screw-connected to the top of the hydraulic cylinder barrel 1, and the piston rod 12 penetrates through the hydraulic cylinder head 2.

[0022] It should be noted that the sealing rings 5 in the embodiment are made of elastic metal material, and the notches 14 on the surface of the sealing rings 5 facilitate sleeving of the sealing rings 5 on the surface of the piston rod 12.

[0023] It should be noted that the compensation ring 8, the sealing rings 6 and the sealing washer 7 in the embodiment are all made of elastic rubber, which facilitates close contact of the compensation ring 8 and the sealing rings 6 with the surface of the piston rod 12 and close contact of the sealing washer 7 with the surface of the hydraulic cylinder barrel 1.

[0024] The working principle of the above embodiment is:

[0025] In use, the limiting ring 4 is fixedly installed inside the sealing sleeve 3, the sealing ring 5 and the sealing ring 6 are installed between the two limiting rings 4, the piston rod 12 is passed out of the sealing sleeve 3, so that the sealing ring 5 and the sealing ring 6 are in contact with the surface of the piston rod 12, then the hydraulic cylinder head 2 is screwed to the top of the hydraulic cylinder barrel 1, the connecting part of the hydraulic cylinder barrel 1, the hydraulic cylinder head 2 and the piston rod 12 is sealed by the compensation ring 8 and the sealing washer 7, the connecting part of the hydraulic cylinder barrel 1, the hydraulic cylinder head 2 and the piston rod 12 is protected by the telescopic protective sleeve 10, which is conducive to preventing dust from accumulating at the connecting part of the hydraulic cylinder barrel 1, the hydraulic cylinder head 2 and the piston rod 12.

[0026] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. In this document, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0027] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace, and vary in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A single-rod piston hydraulic cylinder with good sealing performance, comprising a hydraulic cylinder barrel (1) and a hydraulic cylinder head (2), characterized in that: A sealing mechanism is provided between the hydraulic cylinder barrel (1) and the hydraulic cylinder head (2); The sealing mechanism includes a sealing sleeve (3) fixedly installed inside the hydraulic cylinder (1). The sealing sleeve (3) is provided with a limiting ring (4), a sealing ring (5) and a sealing ring (6). A sealing gasket (7) is fixedly installed inside the hydraulic cylinder head (2). A compensation ring (8) is fixedly installed on the inner surface of the sealing gasket (7). A first connecting ring (9) is fixedly installed on the outer surface of the hydraulic cylinder (1). A telescopic protective sleeve (10) is fixedly installed on the surface of the first connecting ring (9). A piston (11) is movably installed inside the hydraulic cylinder (1). A piston rod (12) is fixedly installed on the surface of the piston (11), penetrating the sealing sleeve (3) and extending to the outside of the hydraulic cylinder (1). A second connecting ring (13) is fixedly installed on the surface of the piston rod (12). One end of the telescopic protective sleeve (10) is fixedly connected to the second connecting ring (13).

2. The single-rod piston hydraulic cylinder with good sealing performance according to claim 1, characterized in that: The number of the limiting rings (4) is four, and every two limiting rings (4) form a group.

3. A single-rod piston hydraulic cylinder with good sealing performance according to claim 1, characterized in that: The number of sealing rings (5) and sealing rings (6) is two, and each pair of limiting rings (4) limits one of the sealing rings (5) and sealing rings (6).

4. A single-rod piston hydraulic cylinder with good sealing performance according to claim 1, characterized in that: The sealing ring (5) has a notch (14) on its surface.

5. A single-rod piston hydraulic cylinder with good sealing performance according to claim 1, characterized in that: The sealing ring (5) and sealing ring (6) are fitted onto the surface of the piston rod (12) and are in contact with the surface of the piston rod (12).

6. A single-rod piston hydraulic cylinder with good sealing performance according to claim 1, characterized in that: The piston rod (12) is located inside the compensation ring (8) and is in contact with the compensation ring (8).

7. A single-rod piston hydraulic cylinder with good sealing performance according to claim 1, characterized in that: The hydraulic cylinder head (2) is threaded to the top of the hydraulic cylinder barrel (1), and the piston rod (12) passes through the hydraulic cylinder head (2).

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