CN217271118U

CN217271118U - Sealing structure for hydraulic cylinder

Info

Publication number: CN217271118U
Application number: CN202123413777.5U
Authority: CN
Inventors: 尚新平
Original assignee: Suzhou Lika New Machinery Technology Co ltd
Current assignee: Suzhou Lika New Machinery Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-08-23
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a sealing structure for a hydraulic cylinder, which comprises a cylinder body, a piston rod movably arranged in the cylinder body and a sealing protection component arranged on the cylinder body; sealed protection component includes connecting sleeve, the piece that connects, fixed disc, first sealing washer, folding hose, the joint spring, ejector pad and gag lever post, the cover is equipped with connecting sleeve on the outer peripheral face that the piston rod closes on the top, the outer peripheral face of connecting sleeve encircles and is provided with the piece that connects, the external screw thread has been seted up to the outer peripheral face of connecting sleeve, the thread groove has been seted up on the inside cavity of piece that connects and its inner wall, the piece that connects passes through thread groove and connecting sleeve threaded connection, the cover is equipped with fixed disc on the outer peripheral face that the cylinder body closes on the top, first ring channel has been seted up on the fixed disc outer peripheral face, the activity is provided with first sealing washer on the first ring channel, the fixed folding hose that is provided with between piece bottom surface and the first sealing washer top surface. The utility model discloses sealed effect is more perfect, and personnel maintain convenient rapidly.

Description

Sealing structure for hydraulic cylinder

Technical Field

The utility model relates to a hydraulic cylinder technical field, in particular to seal structure for hydraulic cylinder.

Background

The hydraulic oil cylinder is an actuating element in a hydraulic transmission system, is an energy conversion device for converting hydraulic energy into mechanical energy and is used for driving a working mechanism to do linear reciprocating motion or reciprocating swing. Hydraulic rams typically include a cylinder and a piston rod assembly that includes a piston and a piston rod. In the cooperation process of cylinder and piston rod, can set up seal structure often for prevent that hydraulic oil from appearing leaking, guarantee hydraulic system's normal work. A common hydraulic oil cylinder sealing structure is generally sealed and leak-proof by arranging a sealing ring on the inner wall of a top plate of a cylinder body.

In the prior art, sealing structures on hydraulic cylinders are sealed and leak-proof through sealing rings, although leakage-proof of oil can be guaranteed, along with telescopic inlet and outlet of piston rods, particulate matters such as tiny dust, sand and the like in the working environment can be attached to the piston rods and repeatedly contact with the sealing rings to accelerate abrasion of the sealing rings, the sealing effect is reduced, and personnel maintenance is inconvenient.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide a seal structure for hydraulic cylinder, can effectively solve the seal structure on the hydraulic cylinder among the prior art and all adopt the sealing washer to seal the leak protection, though can guarantee the leak protection of fluid, nevertheless along with the flexible business turn over of piston rod, particulate matter such as small dust and sand grain among its operational environment can be stained with attaches on the piston rod and with the sealing washer repeated contact with higher speed the wearing and tearing of sealing washer, cause sealed effect to descend, personnel maintain also inconvenient problem.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: a sealing structure for a hydraulic cylinder comprises a cylinder body, a piston rod movably arranged in the cylinder body and a sealing protection assembly arranged on the cylinder body;

the sealing protection assembly comprises a connecting sleeve, a connecting block, a fixed disc, a first sealing ring, a folding hose, a clamping spring, a pushing block and a limiting rod, wherein the connecting sleeve is sleeved on the outer peripheral surface of the piston rod close to the top end, the connecting block is arranged on the outer peripheral surface of the connecting sleeve in a surrounding manner, external threads are arranged on the outer peripheral surface of the connecting sleeve, the connecting block is hollow inside, a thread groove is formed in the inner wall of the connecting block, the connecting block is in threaded connection with the connecting sleeve through the thread groove, the fixed disc is sleeved on the outer peripheral surface of the cylinder body close to the top end, a first ring groove is formed in the outer peripheral surface of the fixed disc, the first sealing ring is movably arranged on the first ring groove, the folding hose is fixedly arranged between the bottom surface of the connecting block and the top surface of the first sealing ring, and a mounting groove is formed in the inner wall of the first ring groove close to the center of the fixed disc, the fixed joint spring that is provided with on the mounting groove, every the joint spring is kept away from the fixed ejector pad that is provided with of one end of fixed disc, every the ejector pad is kept away from one side fixed gag lever post that is provided with of joint spring, spacing hole has been seted up on the first sealing washer inner wall, the gag lever post runs through and extends to spacing downthehole, and first sealing washer can the activity break away from first sealing washer.

Preferably, a second annular groove is formed in the inner wall of the cylinder body, two second annular grooves are formed in the second annular groove and close to the top end of the cylinder body, and a second sealing ring is movably arranged on each second annular groove.

Preferably, a guide cylinder is embedded on the inner wall of the second sealing ring, the piston rod penetrates through the guide cylinder, and the guide cylinder mainly guides and limits the piston rod.

Preferably, the fixed buffering that is provided with on the inside bottom surface of cylinder body glues the piece, the buffering glues the piece outer peripheral face and encircles and be provided with buffer spring and buffer spring bottom and be connected with the inside bottom surface of cylinder body.

Preferably, the mounting grooves are provided with four mounting grooves and are respectively arranged in an equidistant circumferential array along the side line of the first annular groove, and the mounting grooves are mainly used for fixedly placing the buffer springs.

Preferably, the clamping springs are arranged in one-to-one correspondence with the mounting grooves.

Preferably, the spacing hole is equipped with four altogether and is equidistance circumference array respectively along first sealing washer sideline, the gag lever post is the one-to-one setting with the spacing hole, the terminal surface diameter of gag lever post is less than the internal diameter in spacing hole.

Compared with the prior art, the utility model relates to a seal structure for hydraulic cylinder has following beneficial effect: particles such as tiny dust, sand and the like in the working environment can be attached to the piston rod and repeatedly contact with the sealing ring to accelerate the abrasion of the sealing ring, so that the sealing effect is reduced, and the personnel maintenance is inconvenient

In the utility model, the folding hose can be sleeved outside the cylinder body and the piston rod through the assembling block and the first sealing ring which are hollow inside, the assembling block is close to the connecting sleeve on the outer peripheral surface of the top end of the piston rod to rotate, the locking and fixing of the assembling block and the connecting sleeve are completed by utilizing the matching of the thread groove on the inner wall of the assembling block and the external thread of the connecting sleeve, the top end of the folding hose is sealed and fixed therewith, the first sealing ring at the bottom end of the folding hose can synchronously rotate along with the assembling block, the first sealing ring is pressed to enter the first ring groove to complete the assembling with the fixed disc, the bottom end of the folding hose is sealed, the first sealing ring supports against the limiting rod to enable the first sealing ring to compress the mounting groove along with the pushing block and the clamping spring, when the first sealing ring rotates to a specific angle, and the mounting groove is matched with the position of the limiting hole, the clamping spring is released to drive the pushing block and the limiting rod to reset, the gag lever post inserts spacing downthehole restriction locking to first sealing washer thereupon, folding hose is damaged the back, folding hose can be taken through reversal splice block and first sealing washer and changes to the external world, personnel maintain convenient rapidly, on a plurality of second sealing washers carry out the basis sealed to the piston rod in the cylinder body is inside, utilize folding hose to carry out sealed parcel to the connecting portion that exposes of cylinder body and piston rod, folding hose can not influence the flexible of piston rod yet, particulate matter such as small dust and sand grain to the wearing and tearing of second sealing washer have been prevented, sealed effect is more perfect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of a sealing structure for a hydraulic cylinder according to the present invention;

fig. 2 is a schematic front view of the sealing structure for a hydraulic cylinder according to the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2 according to the present invention;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 2 according to the present invention;

fig. 5 is a schematic cross-sectional view of the utility model at C-C in fig. 3.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a cylinder body; 2. a piston rod; 3. a connecting sleeve; 4. assembling blocks; 5. fixing the disc; 6. a first annular groove; 7. a first seal ring; 8. folding the hose; 9. mounting grooves; 10. clamping a spring; 11. a push block; 12. a limiting rod; 13. a limiting hole; 14. a second annular groove; 15. a second seal ring; 16. a guide cylinder; 17. buffering the rubber block; 18. a buffer spring.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the utility model relates to a sealing structure for a hydraulic cylinder, which comprises a cylinder body 1, a piston rod 2 movably arranged in the cylinder body 1, and a sealing protection component arranged on the cylinder body 1;

the sealing protection component comprises a connecting sleeve 3, a connecting block 4, a fixed disc 5, a first sealing ring 7, a folding hose 8, a clamping spring 10, a pushing block 11 and a limiting rod 12, wherein the connecting sleeve 3 is sleeved on the outer peripheral surface of the piston rod 2 close to the top end, the connecting block 4 is arranged on the outer peripheral surface of the connecting sleeve 3 in a surrounding mode, external threads are arranged on the outer peripheral surface of the connecting sleeve 3, the connecting block 4 is hollow, a thread groove is formed in the inner wall of the connecting block 4, the connecting block 4 is in threaded connection with the connecting sleeve 3 through the thread groove, the fixed disc 5 is sleeved on the outer peripheral surface of the cylinder body 1 close to the top end, a first annular groove 6 is formed in the outer peripheral surface of the fixed disc 5, the first sealing ring 7 is movably arranged on the first annular groove 6, the folding hose 8 is fixedly arranged between the bottom surface of the connecting block 4 and the top surface of the first sealing ring 7, and a mounting groove 9 is formed in the inner wall of the first annular groove 6 close to the center of the fixed disc 5, the fixed joint spring 10 that is provided with on the mounting groove 9, the fixed ejector pad 11 that is provided with of one end that fixed disc 5 was kept away from to every joint spring 10, and one side that joint spring 10 was kept away from to every ejector pad 11 is fixed and is provided with a gag lever post 12, has seted up spacing hole 13 on the 7 inner walls of first sealing washer, and gag lever post 12 runs through and extends to spacing downthehole 13, and first sealing washer 7 can the activity break away from first sealing washer 7.

Furthermore, a second annular groove 14 is formed in the inner wall of the cylinder body 1, the second annular grooves 14 are provided with two parts and close to the top end of the cylinder body 1, and a second sealing ring 15 is movably arranged on each second annular groove 14.

Furthermore, a guide cylinder 16 is embedded in the inner wall of the second sealing ring 15, the piston rod 2 penetrates through the guide cylinder 16, and the guide cylinder 16 mainly guides and limits the piston rod 2.

Further, a buffering rubber block 17 is fixedly arranged on the bottom surface inside the cylinder body 1, a buffering spring 18 is arranged on the outer peripheral surface of the buffering rubber block 17 in a surrounding mode, and the bottom end of the buffering spring 18 is connected with the bottom surface inside the cylinder body 1.

Furthermore, the mounting grooves 9 are provided with four mounting grooves 9 and are arranged in an equidistant circumferential array along the side line of the first annular groove 6, and the mounting grooves 9 are mainly used for fixedly placing the buffer springs 18.

Further, the clamping springs 10 are arranged in one-to-one correspondence with the mounting grooves 9.

Furthermore, the limiting holes 13 are provided with four limiting rods and are arranged in an equidistant circumferential array along the side line of the first sealing ring 7, the limiting rods 12 are arranged in a one-to-one correspondence with the limiting holes 13, and the end face diameter of each limiting rod 12 is smaller than the inner diameter of each limiting hole 13.

The working principle of the utility model is as follows:

when a person uses the device, the folding hose 8 is sleeved outside the cylinder body 1 and the piston rod 2, the assembling block 4 is close to the connecting sleeve 3 on the outer peripheral surface of the top end of the piston rod 2 and rotates, the locking and fixing of the assembling block 4 and the connecting sleeve 3 are completed by utilizing the thread groove on the inner wall of the assembling block 4 and the external thread matching of the connecting sleeve 3, the top end of the folding hose 8 is sealed and fixed therewith, the first sealing ring 7 at the bottom end of the folding hose 8 rotates synchronously with the assembling block 4, the first sealing ring 7 is pressed to enter the first annular groove 6 to complete the assembling with the fixed disc 5, the bottom end of the folding hose 8 is sealed, the first sealing ring 7 abuts against the limiting rod 12 to be compressed to the mounting groove 9 along with the pushing block 11 and the clamping spring 10, when the first sealing ring 7 rotates to a specific angle and the mounting groove 9 is matched with the position of the limiting hole 13, the clamping spring 10 is released to drive the pushing block 11 and the limiting rod 12 to reset, the gag lever post 12 inserts in the spacing hole 13 thereupon and can accomplish the restriction locking to first sealing washer 7, and folding hose 8 after 8 damaged can be taken through reversal connection piece 4 and first sealing washer 7 and change to the external world, and on a plurality of second sealing washer 15 carried out the basis sealed to piston rod 2 in that cylinder body 1 is inside, utilize folding hose 8 to carry out sealed parcel to the connecting portion that expose of cylinder body 1 and piston rod 2. The folding hose 8 can not influence the extension and retraction of the piston rod 2, and the abrasion of particles such as tiny dust and sand grains to the second sealing ring 15 is prevented.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The sealing structure for the hydraulic oil cylinder is characterized by comprising a cylinder body (1), a piston rod (2) movably arranged in the cylinder body (1) and a sealing protection assembly arranged on the cylinder body (1);

the sealing protection assembly comprises a connecting sleeve (3), an assembling block (4), a fixed disc (5), a first sealing ring (7), a folding hose (8), a clamping spring (10), a pushing block (11) and a limiting rod (12), wherein the connecting sleeve (3) is sleeved on the outer peripheral surface of the piston rod (2) close to the top end, the assembling block (4) is arranged on the outer peripheral surface of the connecting sleeve (3) in a surrounding mode, external threads are formed in the outer peripheral surface of the connecting sleeve (3), the assembling block (4) is hollow inside and provided with a thread groove in the inner wall, the assembling block (4) is in threaded connection with the connecting sleeve (3) through the thread groove, the fixed disc (5) is sleeved on the outer peripheral surface of the cylinder body (1) close to the top end, a first annular groove (6) is formed in the outer peripheral surface of the fixed disc (5), and the first sealing ring (7) is movably arranged on the first annular groove (6), the fixed folding hose (8) that is provided with between assembly piece (4) bottom surface and first sealing washer (7) top surface, mounting groove (9) have been seted up on first ring channel (6) close on the inner wall at fixed disc (5) center, the fixed joint spring (10) that is provided with on mounting groove (9), every the fixed ejector pad (11) that is provided with of one end that is kept away from fixed disc (5) in joint spring (10), every fixed gag lever post (12) that is provided with in one side that joint spring (10) were kept away from in ejector pad (11), spacing hole (13) have been seted up on first sealing washer (7) inner wall, gag lever post (12) run through and extend to in spacing hole (13).

2. The sealing structure for a hydraulic cylinder according to claim 1, characterized in that: the inner wall of the cylinder body (1) is provided with a second annular groove (14), the second annular grooves (14) are provided with two parts and close to the top end of the cylinder body (1), and each second annular groove (14) is movably provided with a second sealing ring (15).

3. The sealing structure for a hydraulic cylinder according to claim 2, characterized in that: and a guide cylinder (16) is embedded on the inner wall of the second sealing ring (15), and the piston rod (2) penetrates through the guide cylinder (16).

4. The sealing structure for a hydraulic cylinder according to claim 1, characterized in that: the cylinder body (1) is fixed on the inside bottom surface to be provided with buffering and glues piece (17), buffering glues piece (17) outer peripheral face and encircles and be provided with buffer spring (18) and buffer spring (18) bottom and be connected with the inside bottom surface of cylinder body (1).

5. The sealing structure for a hydraulic cylinder according to claim 1, characterized in that: the mounting grooves (9) are four in number and are in equidistant circumferential array along the side line of the first annular groove (6).

6. The sealing structure for a hydraulic cylinder according to claim 5, characterized in that: the clamping springs (10) are arranged in one-to-one correspondence with the mounting grooves (9).

7. The sealing structure for a hydraulic cylinder according to claim 1, characterized in that: spacing hole (13) are equipped with four altogether and are equidistance circumference array respectively along first sealing washer (7) sideline, gag lever post (12) are the one-to-one setting with spacing hole (13), the terminal surface diameter of gag lever post (12) is less than the internal diameter of spacing hole (13).