Leakage-proof combined structure of oil cylinder guide sleeve

Abstract

The utility model discloses a leakproof combined structure of an oil cylinder guide sleeve, which comprises a cylinder sleeve used for accommodating hydraulic oil; the piston rod is used for converting the pressure of the hydraulic oil into kinetic energy; the oil cylinder guide sleeve comprises a guide sleeve body and an oil guide opening, the guide sleeve body is used for guiding a piston rod, the oil guide opening is used for circulation of hydraulic oil, the oil cylinder guide sleeve further comprises a limiting ring, and the limiting ring is used for limiting the position of the guide sleeve body. The groove is formed in the guide sleeve body, the outer resistance ring is installed in the guide sleeve body, so that the guide sleeve body can be sealed while oil dirt attached to a piston rod is blocked, the guide sleeve is sealed through the dustproof ring and the sealing ring, and the sealing ring on the cylinder sleeve can be attached to the guide sleeve body under pressing of hydraulic oil. The purpose of preventing leakage of the oil cylinder guide sleeve is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of guide sleeve leakage prevention, in particular to an oil cylinder guide sleeve leakage prevention combined structure. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The guide sleeve of the hydraulic cylinder is a part installed at the front end of the cylinder barrel to guide and seal the piston rod.

[0003] In the prior art, such as the Chinese patent number: CN213899464U, a new zero-leakage sealing combination structure for a vertical cylinder guide sleeve is disclosed, in which three mounting grooves are provided on the inner wall of the guide sleeve that cooperates with the piston rod; a buffer ring is installed in the groove close to the rod cavity, a Y ring is installed in the groove in the middle position, and a waterproof and dustproof ring is installed in the groove close to the outer side; the Y ring is provided with an annular notch on the side close to the rod cavity, and an O ring is installed in the notch.

[0004] However, in the prior art, although the above patent has the above technical advantages, it has the following disadvantages: the above patent has a sealing mechanism between the guide sleeve and the piston rod, but the guide sleeve is also installed in the oil cylinder, so the hydraulic oil can also overflow along the gap between the oil cylinder and the guide sleeve. In addition, the seal in the guide sleeve is a wearing part, and the seal is tightly fitted on the guide sleeve for sealing, which makes it difficult to remove the seal when replacing the seal. Utility Model Content

[0005] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve the technical problems is: a combined structure for preventing leakage of a cylinder guide sleeve, comprising:

[0006] A cylinder liner, the cylinder liner is used to contain hydraulic oil;

[0007] A piston rod, the piston rod being used to convert the pressure of the hydraulic oil into kinetic energy;

[0008] A guide sleeve body, which is used to guide the piston rod and is clamped on the inner wall of the cylinder sleeve;

[0009] An oil guide port, which is used for the circulation of hydraulic oil and is fixedly connected to the outer wall of the cylinder sleeve;

[0010] The oil cylinder guide sleeve also includes:

[0011] A limiting ring, which is used to limit the position of the guide sleeve body and is clamped on the inner wall of the cylinder sleeve;

[0012] An outer resistance ring, which is used to prevent external dust from entering the interior of the guide sleeve body and is clamped on the inner wall of the guide sleeve body;

[0013] A sealing ring, which is used to prevent the hydraulic oil from flowing out of the guide sleeve body and is clamped on the inner wall of the guide sleeve body;

[0014] A quick-connect mechanism is used to quickly connect the guide sleeve body and the cylinder sleeve. The quick-connect mechanism includes a bolt. A threaded hole is opened in the wall of the guide sleeve body. The outer wall of the bolt is rotatably connected to the inner wall of the guide sleeve body. A limit block is arranged on the outside of the piston rod. The outer wall of the limit block contacts the outer wall of the guide sleeve body. The inner wall of the limit block contacts the outer wall of the bolt. A groove is opened in the wall of the limit block. The outer wall of the limit block contacts the inner wall of the cylinder sleeve.

[0015] Preferably, the inner wall of the guide sleeve body is slidably connected to the outer wall of the piston rod, a choke groove is provided in the wall of the guide sleeve body, and a choke ring is fixedly connected to the outer wall of the guide sleeve body, which fits tightly to the piston rod under the pressure of hydraulic oil.

[0016] Preferably, the inner wall of the blocking ring contacts the outer wall of the piston rod, the inner wall of the guide sleeve body is provided with a notch, the inner wall of the guide sleeve body is provided with an outer blocking groove, and the inner wall of the guide sleeve body is provided with a dustproof groove, which limits the position of the dustproof ring to prevent the dustproof ring from being displaced when the piston rod moves.

[0017] Preferably, a sealing groove is provided on the inner wall of the guide sleeve body, a circular groove is provided on the inner wall of the guide sleeve body, the outer wall of the limiting ring contacts the inner wall of the guide sleeve body, a fixing ring is clamped on the outer wall of the guide sleeve body, the outer wall of the fixing ring contacts the cylinder sleeve, a sealing ring is fixedly connected to the outer wall of the cylinder sleeve, and the limiting ring is made of soft material.

[0018] Preferably, the outer wall of the sealing ring contacts the outer wall of the guide sleeve body, the inner wall of the guide sleeve body is slidably connected with a sliding ball, the outer wall of the sliding ball contacts the outer wall of the piston rod, the inner wall of the guide sleeve body is clamped with a dust ring, and the sliding ball annular array is in the circular groove.

[0019] Preferably, the end of the outer resistance ring away from the guide sleeve body contacts the outer wall of the piston rod, the end of the dust ring away from the guide sleeve body contacts the outer wall of the piston rod, the end of the sealing ring away from the guide sleeve body contacts the outer wall of the piston rod, and the sealing ring fits the outer wall of the piston rod to prevent the hydraulic oil from passing through.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. The utility model provides an outer resistance ring, opens a groove in the guide sleeve body, and installs the outer resistance ring in the guide sleeve body, so that the guide sleeve body can be sealed while blocking the oil stains attached to the piston rod, and the dust ring and the sealing ring also seal the guide sleeve, and the sealing ring on the cylinder sleeve can fit the guide sleeve body under the pressure of hydraulic oil, and also seal the gap between the cylinder sleeve and the guide sleeve body, thereby achieving the purpose of preventing the hydraulic oil from leaking from the gap between the cylinder sleeve and the guide sleeve, and solving the problem that the hydraulic oil of traditional equipment will leak from the gap between the cylinder sleeve and the guide sleeve.

[0022] 2. The utility model sets a quick connection mechanism, screws the bolts into the threaded holes, and squeezes the limit blocks while screwing, forcing the limit blocks to be close to the guide sleeve body and the cylinder sleeve, thereby fixing the guide sleeve body and the cylinder sleeve. At the same time, when replacing the seal in the guide sleeve body, the seal can be hooked out along the groove through the hook, thereby achieving the purpose of quickly installing the cylinder sleeve and the guide sleeve body and easily taking out the seal, and solving the problem that it is difficult to take out the seal when replacing the seal in traditional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the front view of the utility model;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 It is a cross-sectional view of the guide sleeve body of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the limit block of the utility model;

[0027] Figure 5 It is a structural schematic diagram of A of the utility model.

[0028] In the figure: 1. cylinder sleeve; 2. guide sleeve body; 3. piston rod; 4. oil guide port; 5. quick connection mechanism; 51. threaded hole; 52. limit block; 53. bolt; 6. notch; 7. round groove; 8. choke groove; 9. outer choke groove; 10. dustproof groove; 11. sealing groove; 12. choke ring; 13. outer choke ring; 14. dustproof ring; 15. sealing ring; 16. sliding ball; 17. sealing ring; 18. limit ring; 19. fixing ring. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0030] Example:

[0031] See also Figure 1 - Figure 5 The utility model provides a technical solution: a combined structure for preventing leakage of a cylinder guide sleeve, comprising:

[0032] Cylinder liner 1, cylinder liner 1 is used to contain hydraulic oil;

[0033] A piston rod 3, the piston rod 3 is used to convert the pressure of the hydraulic oil into kinetic energy;

[0034] The guide sleeve body 2 is used to guide the piston rod 3 and is clamped on the inner wall of the cylinder sleeve 1;

[0035] The oil guide port 4 is used for the circulation of hydraulic oil and is fixedly connected to the outer wall of the cylinder sleeve 1;

[0036] The oil cylinder guide sleeve also includes:

[0037] A limiting ring 18, which is used to limit the position of the guide sleeve body 2 and is clamped on the inner wall of the cylinder sleeve 1;

[0038] The outer resistance ring 13 is used to prevent external dust from entering the interior of the guide sleeve body 2 and is clamped on the inner wall of the guide sleeve body 2;

[0039] The sealing ring 15 is used to prevent the hydraulic oil from flowing out of the guide sleeve body 2 and is clamped on the inner wall of the guide sleeve body 2;

[0040] A quick-connect mechanism 5 is used to quickly connect the guide sleeve body 2 and the cylinder sleeve 1. The quick-connect mechanism 5 includes a bolt 53. A threaded hole 51 is opened in the wall of the guide sleeve body 2. The outer wall of the bolt 53 is rotatably connected to the inner wall of the guide sleeve body 2. A limit block 52 is arranged on the outside of the piston rod 3. The outer wall of the limit block 52 contacts the outer wall of the guide sleeve body 2. The inner wall of the limit block 52 contacts the outer wall of the bolt 53. The outer wall of the limit block 52 contacts the inner wall of the cylinder sleeve 1. The inner wall of the guide sleeve body 2 is slidably connected to the outer wall of the piston rod 3. A choke groove 8 is opened in the wall of the guide sleeve body 2. A choke ring 12 is fixedly connected to the outer wall of the guide sleeve body 2. The limit blocks 52 are arranged in a ring array on the outer wall of the guide sleeve body 2.

[0041] The inner wall of the blocking ring 12 is in contact with the outer wall of the piston rod 3, the inner wall of the guide sleeve body 2 is provided with a notch 6, the inner wall of the guide sleeve body 2 is provided with an outer blocking groove 9, the inner wall of the guide sleeve body 2 is provided with a dustproof groove 10, the inner wall of the guide sleeve body 2 is provided with a sealing groove 11, the inner wall of the guide sleeve body 2 is provided with a circular groove 7, the outer wall of the limit ring 18 is in contact with the inner wall of the guide sleeve body 2, the outer wall of the guide sleeve body 2 is clamped with a fixing ring 19, the outer wall of the fixing ring 19 is in contact with the cylinder sleeve 1, the outer wall of the cylinder sleeve 1 is fixedly connected with a sealing ring 17, and the sealing ring 17 fits tightly against the outer wall of the guide sleeve body 2 under the pressure of the hydraulic oil.

[0042] The outer wall of the sealing ring 17 contacts the outer wall of the guide sleeve body 2, the inner wall of the guide sleeve body 2 is slidably connected with a sliding ball 16, the outer wall of the sliding ball 16 contacts the outer wall of the piston rod 3, the inner wall of the guide sleeve body 2 is clamped with a dust ring 14, the end of the outer resistance ring 13 away from the guide sleeve body 2 contacts the outer wall of the piston rod 3, the end of the dust ring 14 away from the guide sleeve body 2 contacts the outer wall of the piston rod 3, the end of the sealing ring 15 away from the guide sleeve body 2 contacts the outer wall of the piston rod 3, and the sliding ball 16 reduces the sliding resistance of the piston rod 3.

[0043] Working principle:

[0044] When in use, grooves with various functions are opened in the inner wall of the guide sleeve body 2, and a blocking ring 12 is fixed to the outer wall of the guide sleeve body 2. Therefore, when the piston rod 3 slides into the guide sleeve body 2, the blocking ring 12 fits with the piston rod 3, forcing the piston rod 3 to slide while the blocking ring 12 blocks the hydraulic oil from flowing into the guide sleeve body 2 from the gap between the piston rod 3 and the guide sleeve body 2.

[0045] Before the piston rod 3 slides into the guide sleeve body 2, the sealing ring 15 is installed in the sealing groove 11 in the guide sleeve body 2 in sequence, followed by the dust ring 14 installed in the corresponding dust ring 10, and finally the outermost outer resistance ring 13 is installed in the outer resistance groove 9. At this time, the piston rod 3 can be slid into the guide sleeve body 2. When the piston rod 3 slides in the guide sleeve body 2, a circular groove 7 is also provided in the guide sleeve body 2, and a sliding ball 16 is provided in an annular array inside the circular groove 7. Therefore, when the sliding ball 16 rotates, the friction of the piston rod 3 is reduced. When the seal in the inner wall of the guide sleeve needs to be removed, the seal can be quickly removed from the guide sleeve body 2 by using a hook through the notch 6 provided in the guide sleeve body 2 to contact the seal.

[0046] After the piston rod 3 slides into the guide sleeve body 2, the quick connection mechanism 5 can be used to install the cylinder sleeve 1, and the piston rod 3 and the guide sleeve body 2 can be slid into the inner wall of the cylinder sleeve 1. At this time, the guide sleeve body 2 first contacts the sealing ring 17 on the cylinder sleeve 1. At this time, the sealing ring 17 is tightly fitted with the outer wall of the guide sleeve body 2, and the fixing ring 19 installed in the choke groove 8 is also tightly fitted with the inner wall of the cylinder sleeve 1. At this time, the limit ring 18 can be clamped between the cylinder sleeve 1 and the guide sleeve body 2 to make a preliminary limit on the guide sleeve body 2. A threaded hole 51 is opened in the wall of the guide sleeve body 2. At this time, the limit block 52 is placed between the threaded holes 51 and screwed into the threaded holes 51 by the bolt 53. At this time, the limit block 52 is forced to fit the guide sleeve body 2 and the cylinder sleeve 1 under the pressure of the bolt 53, so that the guide sleeve and the cylinder sleeve 1 are fixed. An oil guide port 4 is fixed on the outer wall of the cylinder sleeve 1. Therefore, the hydraulic pipe can be connected to the oil guide port 4 at this time to start hydraulic work.

[0047] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A combined structure for preventing leakage of a cylinder guide sleeve, comprising: A cylinder liner (1), the cylinder liner (1) being used to contain hydraulic oil; A piston rod (3), wherein the piston rod (3) is used to convert the pressure of the hydraulic oil into kinetic energy; A guide sleeve body (2), the guide sleeve body (2) being used to guide the piston rod (3) and being clamped on the inner wall of the cylinder sleeve (1); An oil guide port (4), the oil guide port (4) is used for the circulation of hydraulic oil and is fixedly connected to the outer wall of the cylinder sleeve (1); It is characterized in that The oil cylinder guide sleeve also includes: A limiting ring (18), the limiting ring (18) is used to limit the position of the guide sleeve body (2) and is clamped on the inner wall of the cylinder sleeve (1); An outer resistance ring (13), the outer resistance ring (13) is used to prevent external dust from entering the interior of the guide sleeve body (2), and is clamped on the inner wall of the guide sleeve body (2); A sealing ring (15), the sealing ring (15) is used to prevent hydraulic oil from flowing out of the guide sleeve body (2) and is clamped on the inner wall of the guide sleeve body (2); A quick connection mechanism (5) is used for quickly connecting the guide sleeve body (2) and the cylinder sleeve (1). The quick connection mechanism (5) comprises a bolt (53). A threaded hole (51) is provided in the wall of the guide sleeve body (2). The outer wall of the bolt (53) is rotatably connected to the inner wall of the guide sleeve body (2). A limit block (52) is provided outside the piston rod (3). The outer wall of the limit block (52) contacts the outer wall of the guide sleeve body (2). The inner wall of the limit block (52) contacts the outer wall of the bolt (53). The outer wall of the limit block (52) contacts the inner wall of the cylinder sleeve (1).

2. The anti-leakage combined structure of a cylinder guide sleeve according to claim 1, characterized in that: The inner wall of the guide sleeve body (2) is slidably connected to the outer wall of the piston rod (3), a flow blocking groove (8) is provided in the wall of the guide sleeve body (2), and a flow blocking ring (12) is fixedly connected to the outer wall of the guide sleeve body (2).

3. The anti-leakage combined structure of a cylinder guide sleeve according to claim 2, characterized in that: The inner wall of the flow-blocking ring (12) contacts the outer wall of the piston rod (3), the inner wall of the guide sleeve body (2) is provided with a notch (6), the inner wall of the guide sleeve body (2) is provided with an outer resistance groove (9), and the inner wall of the guide sleeve body (2) is provided with a dustproof groove (10).

4. The anti-leakage combined structure of a cylinder guide sleeve according to claim 1, characterized in that: The inner wall of the guide sleeve body (2) is provided with a sealing groove (11), the inner wall of the guide sleeve body (2) is provided with a circular groove (7), the outer wall of the limit ring (18) is in contact with the inner wall of the guide sleeve body (2), the outer wall of the guide sleeve body (2) is clamped with a fixing ring (19), the outer wall of the fixing ring (19) is in contact with the cylinder sleeve (1), and the outer wall of the cylinder sleeve (1) is fixedly connected with a sealing ring (17).

5. The anti-leakage combined structure of a cylinder guide sleeve according to claim 4, characterized in that: The outer wall of the sealing ring (17) contacts the outer wall of the guide sleeve body (2), the inner wall of the guide sleeve body (2) is slidably connected with a sliding ball (16), the outer wall of the sliding ball (16) contacts the outer wall of the piston rod (3), and the inner wall of the guide sleeve body (2) is clamped with a dust ring (14).

6. The anti-leakage combined structure of a cylinder guide sleeve according to claim 5, characterized in that: The end of the outer resistance ring (13) away from the guide sleeve body (2) contacts the outer wall of the piston rod (3), the end of the dust ring (14) away from the guide sleeve body (2) contacts the outer wall of the piston rod (3), and the end of the sealing ring (15) away from the guide sleeve body (2) contacts the outer wall of the piston rod (3).

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