High-sealing-performance hydraulic oil cylinder guide sleeve

Abstract

The utility model discloses a high-sealing-performance hydraulic oil cylinder guide sleeve which comprises a hydraulic oil cylinder, a piston rod is connected in the hydraulic oil cylinder in a sliding mode, a piston is arranged at the left end of the piston rod, the piston is connected in the hydraulic oil cylinder in a sliding mode, a guide sleeve is installed at an oil cylinder opening of the hydraulic oil cylinder in a matched mode, and the high-sealing-performance hydraulic oil cylinder guide sleeve further comprises a sealing mechanism. The sealing mechanism comprises a movable sleeve, a connecting ring, an extrusion ring and an avoiding groove, the outer surface of the guide sleeve is movably sleeved with the movable sleeve, the connecting ring is arranged on the left side face of the movable sleeve, the connecting ring and the movable sleeve form a U-shaped structure with an opening in the left side, the extrusion ring is arranged on the left side face of the connecting ring, and the avoiding groove is formed in the right side face of the guide sleeve. According to the high-sealing-performance hydraulic oil cylinder guide sleeve, the guide sleeve and a hydraulic oil cylinder are installed together through the sealing mechanism, tool assistance is not needed during disassembly and assembly, operation is easy, time is saved, and the sealing performance of the guide sleeve to the hydraulic oil cylinder is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic oil cylinder technical field, concretely is a kind of high sealing hydraulic oil cylinder guide sleeve. BACKGROUND

[0002] Hydraulic oil cylinder guide sleeve is the key component of hydraulic oil cylinder, is installed at the oil cylinder mouth of hydraulic oil cylinder, can guide piston rod, ensure that piston rod moves along correct direction in the process of extension and retraction, and can prevent hydraulic oil from leaking from oil cylinder mouth;

[0003] The existing hydraulic oil cylinder guide sleeve is usually connected and fixed by bolt when using, and the sealing rubber ring in the placing groove on the outer surface and inner wall of guide sleeve is used to seal between guide sleeve and hydraulic oil cylinder and between guide sleeve and piston rod.

[0004] The existing hydraulic oil cylinder guide sleeve has the following problems: the guide sleeve is connected and fixed with the oil cylinder mouth of hydraulic oil cylinder, and when the internal parts of hydraulic oil cylinder are replaced, the guide sleeve needs to be disassembled from hydraulic oil cylinder with the aid of tools, which is inconvenient to operate and wastes time. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem of overcoming the defects of the prior art, and provides a high-sealing hydraulic oil cylinder guide sleeve, which is installed with the hydraulic oil cylinder through a sealing mechanism, does not need the aid of tools during disassembly and assembly, is simple to operate and saves time, and has high sealing performance for the hydraulic oil cylinder, so that the problems in the background art can be effectively solved.

[0006] To achieve the above object, the utility model provides the following technical scheme: a high-sealing hydraulic oil cylinder guide sleeve, comprising a hydraulic oil cylinder, a piston rod slidably connected inside the hydraulic oil cylinder, a piston provided at the left end of the piston rod, the piston slidably connected inside the hydraulic oil cylinder, a guide sleeve cooperatively installed at the oil cylinder mouth of the hydraulic oil cylinder, and a sealing mechanism.

[0007] The sealing mechanism comprises a movable sleeve, a connecting ring, an extrusion ring and an avoiding groove, the outer surface of the guide sleeve is provided with a movable sleeve, the left side of the movable sleeve is provided with a connecting ring, the connecting ring and the movable sleeve form a U-shaped structure with the left side opening, the left side of the connecting ring is provided with an extrusion ring, the right side of the guide sleeve is provided with an avoiding groove, and the extrusion ring is slidably connected inside the avoiding groove.

[0008] Furthermore, the sealing mechanism also includes internal and external threads. The inner wall of the movable sleeve is provided with an internal thread on the left side, and the outer surface of the hydraulic cylinder is provided with an external thread on the right end. The internal thread and the external thread are threadedly connected to facilitate the fixing of the movable sleeve.

[0009] Furthermore, the sealing mechanism also includes an L-shaped sealing ring. An L-shaped sealing ring is fixedly fitted on the right end of the outer surface of the guide sleeve. The inner wall of the hydraulic cylinder port is stepped. The outer surface of the L-shaped sealing ring fits against the stepped inner wall, which facilitates sealing between the hydraulic cylinder and the guide sleeve.

[0010] Furthermore, the sealing mechanism also includes a Y-shaped sealing ring. A Y-shaped sealing ring is fixedly fitted on the left end of the outer surface of the guide sleeve. The outer surface of the Y-shaped sealing ring is in contact with the inner wall of the hydraulic cylinder. The lip of the Y-shaped sealing ring faces to the left to facilitate self-sealing.

[0011] Furthermore, the guide sleeve has placement grooves on both the left and right sides of its inner wall. The left placement groove has a sealing ring inside, and the right placement groove has a dustproof ring inside. The inner walls of the sealing ring and the dustproof ring are in contact with the outer surface of the piston rod, which facilitates sealing between the guide sleeve and the piston rod and prevents dust from entering.

[0012] Furthermore, the inner wall of the guide sleeve is provided with evenly distributed slots, which are all located between the sealing ring and the dustproof ring. The inside of the slot is rotatably connected with a ball, and the outer surface of the ball is in contact with the outer surface of a piston rod, which helps to reduce the contact area between the guide sleeve and the piston rod and improve the service life.

[0013] Furthermore, a barrier rubber ring is fixedly sleeved on the left end of the outer surface of the piston rod, and the left side of the barrier rubber ring is fixedly connected to the right side of the piston, so as to block the hydraulic oil in the two chambers inside the hydraulic cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This high-sealing hydraulic cylinder guide sleeve has the following advantages:

[0015] 1. Holding the movable sleeve, insert the guide sleeve into the cylinder port of the hydraulic cylinder. Rotate the movable sleeve to install it onto the hydraulic cylinder through the internal and external threads. During installation, the movable sleeve moves to the left, causing the compression ring to press against the left wall of the clearance groove. At this time, the movable sleeve presses against the right side of the guide sleeve, fixing the guide sleeve inside the hydraulic cylinder. When disassembly is required, rotate the movable sleeve in the opposite direction and then pull the movable sleeve to the right to remove the guide sleeve from the hydraulic cylinder. No tools are needed for disassembly and assembly, making the operation simple and time-saving.

[0016] 2. During operation, the movable sleeve compresses the guide sleeve, causing the outer surface of the L-shaped sealing ring to tightly adhere to the stepped inner wall at the cylinder port of the hydraulic cylinder. Under the pressure of hydraulic oil, the Y-shaped sealing ring deforms outward through the lip, achieving self-sealing. The guide sleeve provides high sealing performance for the hydraulic cylinder. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0018] Fig. 2 This is a cross-sectional structural diagram of the present invention;

[0019] Fig. 3 This is an enlarged structural diagram of point A of this utility model.

[0020] In the diagram: 1 Hydraulic cylinder, 2 Piston rod, 3 Sealing mechanism, 31 Movable sleeve, 32 Connecting ring, 33 Extrusion ring, 34 Clearance groove, 35 Internal thread, 36 External thread, 37 L-shaped sealing ring, 38 Y-shaped sealing ring, 4 Guide sleeve, 5 Sealing ring, 6 Dustproof ring, 7 Groove, 8 Ball bearing, 9 Piston, 10 Barrier ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figs. 1-3This embodiment provides a technical solution: a high-sealing hydraulic cylinder guide sleeve, including a hydraulic cylinder 1, a piston rod 2 slidably connected inside the hydraulic cylinder 1, a piston 9 at the left end of the piston rod 2, the piston 9 slidably connected inside the hydraulic cylinder 1, a guide sleeve 4 fitted at the cylinder port of the hydraulic cylinder 1, and a sealing mechanism 3. The guide sleeve 4 has placement grooves on both the left and right sides of its inner wall. A sealing ring 5 is placed inside the left placement groove, and a dustproof ring 6 is placed inside the right placement groove. The inner walls of both the sealing ring 5 and the dustproof ring 6 are in contact with the outer surface of the piston rod 2. The guide sleeve 4 has evenly distributed grooves 7 on its inner wall, all located between the sealing ring 5 and the dustproof ring 6. Inside the slot 7, there is a rotating ball bearing 8. The outer surface of the ball bearing 8 is in contact with the outer surface of a piston rod 2. A barrier ring 10 is fixedly sleeved on the left end of the outer surface of the piston rod 2. The left side of the barrier ring 10 is fixedly connected to the right side of the piston 9. Due to the presence of the sealing ring 5, the piston rod 2 and the guide sleeve 4 are sealed. The dustproof ring 6 prevents dust from entering the hydraulic cylinder 1 from between the piston rod 2 and the guide sleeve 4. When the piston rod 2 moves, the ball bearing 8 rotates in the slot 7, reducing the contact area between the guide sleeve 4 and the piston rod 2, thereby reducing the heat generation and improving the service life of the piston rod 2. The barrier ring 10 blocks the hydraulic oil on both sides of the piston 9.

[0023] Sealing mechanism 3 includes a movable sleeve 31, a connecting ring 32, a compression ring 33, and a relief groove 34. The movable sleeve 31 is movably fitted onto the outer surface of the guide sleeve 4. The connecting ring 32 is located on the left side of the movable sleeve 31, forming a U-shaped structure with an opening on the left side. The compression ring 33 is located on the left side of the connecting ring 32. The relief groove 34 is located on the right side of the guide sleeve 4, and the compression ring 33 is slidably connected to the inside of the relief groove 34. The sealing mechanism 3 also includes an internal thread 35 and an external thread 36. The internal thread 35 is located on the left side of the inner wall of the movable sleeve 31, and the external thread 36 is located on the right end of the outer surface of the hydraulic cylinder 1. The sealing mechanism 3 also includes an L-shaped sealing ring 37, with the inner thread 35 and the outer thread 36 threaded together. The guide sleeve 4 has an L-shaped sealing ring 37 fixedly fitted on its right outer surface (the L-shaped sealing ring 37 is an L-shaped rubber ring). The inner wall of the hydraulic cylinder 1 at the cylinder port is stepped, and the outer surface of the L-shaped sealing ring 37 fits against the stepped inner wall. The sealing mechanism 3 also includes a Y-shaped sealing ring 38, with a Y-shaped sealing ring 38 fixedly fitted on its left outer surface (the Y-shaped sealing ring 38 is a polyurethane Y-ring). The outer surface of the Y-shaped sealing ring 38 fits against the inner wall of the hydraulic cylinder 1. With the lip facing left, when assembling the hydraulic cylinder 1 and guide sleeve 4, hold the movable sleeve 31 and insert the guide sleeve 4 into the cylinder port of the hydraulic cylinder 1 until the internal thread 35 on the movable sleeve 31 contacts the external thread 36 on the hydraulic cylinder 1. Then rotate the movable sleeve 31, and install the movable sleeve 31 onto the hydraulic cylinder 1 through the threaded connection between the internal thread 35 and the external thread 36. During installation, the movable sleeve 31 moves from right to left. The movement of the movable sleeve 31 drives the extrusion ring 33 to move through the connecting ring 32 until the left side of the extrusion ring 33 extrudes the left wall of the relief groove 34. At this time, the connecting ring 32 and the movable sleeve... The U-shaped structure with the left opening of the movable sleeve 31 compresses the right side of the guide sleeve 4. Through the compression of the guide sleeve 4 by the movable sleeve 31, the outer surface of the L-shaped sealing ring 37 is tightly attached to the stepped inner wall at the cylinder port of the hydraulic cylinder 1. Due to the presence of the Y-shaped sealing ring 38, when the hydraulic cylinder 1 is working, the hydraulic oil flows into the lip of the Y-shaped sealing ring 38. Under the action of hydraulic oil pressure, the lip of the Y-shaped sealing ring 38 expands and deforms, and the lip is tightly attached to the inner wall of the hydraulic cylinder 1, creating a self-sealing effect. When disassembly is required, the movable sleeve 31 is rotated in the opposite direction, and then the movable sleeve 31 is pulled to the right to remove the guide sleeve 4 from the hydraulic cylinder 1.

[0024] The working principle of the high-sealing hydraulic cylinder guide sleeve provided by this utility model is as follows: When assembling the hydraulic cylinder 1 and the guide sleeve 4, hold the movable sleeve 31 and insert the guide sleeve 4 into the cylinder port of the hydraulic cylinder 1 until the internal thread 35 on the movable sleeve 31 contacts the external thread 36 on the hydraulic cylinder 1. Then rotate the movable sleeve 31, and install the movable sleeve 31 on the hydraulic cylinder 1 through the threaded connection between the internal thread 35 and the external thread 36. During installation, the movable sleeve 31 moves from right to left. The movement of the movable sleeve 31 drives the compression ring 33 to move through the connecting ring 32 until the left side of the compression ring 33 presses against the left wall of the relief groove 34. At this time, the connecting ring 32 and the movable sleeve 31 form a U-shaped structure with a left-side opening, pressing against the right side of the guide sleeve 4. Through the compression of the guide sleeve 4 by the movable sleeve 31, the outer surface of the L-shaped sealing ring 37 is tightly attached to the cylinder port of the hydraulic cylinder 1. The stepped inner wall, due to the presence of the Y-type sealing ring 38, allows hydraulic oil to flow into the lip of the Y-type sealing ring 38 during operation. Under the pressure of the hydraulic oil, the lip of the Y-type sealing ring 38 deforms outward and adheres tightly to the inner wall of the hydraulic cylinder 1, creating a self-sealing effect. When disassembly is required, the movable sleeve 31 is rotated in the reverse direction, and then the movable sleeve 31 is pulled to the right to remove the guide sleeve 4 from the hydraulic cylinder 1. Due to the presence of the sealing ring 5, a seal is achieved between the piston rod 2 and the guide sleeve 4. The dustproof ring 6 prevents dust from entering the hydraulic cylinder 1 from between the piston rod 2 and the guide sleeve 4. When the piston rod 2 moves, the ball 8 rotates in the groove 7, reducing the contact area between the guide sleeve 4 and the piston rod 2, thereby reducing heat generation and improving the service life of the piston rod 2. The barrier ring 10 blocks the hydraulic oil on both sides of the piston 9.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-sealing hydraulic cylinder guide sleeve, comprising a hydraulic cylinder (1), a piston rod (2) is slidably connected in the interior of the hydraulic cylinder (1), a piston (9) is arranged at the left end of the piston rod (2), the piston (9) is slidably connected in the interior of the hydraulic cylinder (1), and a guide sleeve (4) is fitted and arranged at the cylinder port of the hydraulic cylinder (1), characterized in that: Also include sealing mechanism (3); The sealing mechanism (3) further includes an inner thread (35) and an outer thread (36), the inner wall left side of the movable sleeve (31) is provided with an inner thread (35), the outer surface of the hydraulic oil cylinder (1) is provided with an outer thread (36) at the right end, and the inner thread (35) is screwed with the outer thread (36).

2. The hydraulic cylinder guide sleeve with high sealing performance according to claim 1, characterized in that: The sealing mechanism (3) further includes L-shaped sealing ring (37), the outer surface of the guide sleeve (4) is fixedly provided with L-shaped sealing ring (37) at the right end, the inner wall of the oil cylinder port of the hydraulic oil cylinder (1) is stepped, the outer surface of the L-shaped sealing ring (37) is attached to the stepped inner wall.

3. The hydraulic cylinder guide sleeve with high sealing performance according to claim 1, characterized in that: The sealing mechanism (3) further includes Y-shaped sealing ring (38), the outer surface of the guide sleeve (4) is fixedly provided with Y-shaped sealing ring (38) at the left end, the outer surface of the Y-shaped sealing ring (38) is attached to the inner wall of the hydraulic oil cylinder (1), and the lip of the Y-shaped sealing ring (38) faces the left side.

4. The high sealing hydraulic cylinder guide sleeve according to claim 1, characterized in that: The inner wall of the guide sleeve (4) is provided with a placing groove on the left and right sides, the inner part of the placing groove on the left side is provided with a sealing rubber ring (5), and the inner part of the placing groove on the right side is provided with a dustproof rubber ring (6), the inner wall of the sealing rubber ring (5) and the dustproof rubber ring (6) is attached to the outer surface of the piston rod (2).

5. The high sealing hydraulic cylinder guide sleeve according to claim 1, characterized in that: The inner wall of the guide sleeve (4) is provided with uniformly distributed notches (7), the notches (7) are located between the sealing rubber ring (5) and the dustproof rubber ring (6), the inner part of the notch (7) is rotatably connected with a ball (8), and the outer surface of the ball (8) is in contact with the outer surface of one piston rod (2).

6. The high sealing hydraulic cylinder guide sleeve according to claim 5, characterized in that: The outer surface of the piston rod (2) is fixedly provided with a blocking rubber ring (10) at the left end, and the left side of the blocking rubber ring (10) is fixedly connected with the right side of the piston (9).

7. The high sealing hydraulic cylinder guide sleeve according to claim 1, characterized in that: ​

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