CN221401191U

CN221401191U - Excavator bucket rod oil cylinder

Info

Publication number: CN221401191U
Application number: CN202323493300.1U
Authority: CN
Inventors: 陈星星; 郭皓; 詹昌吉; 郭华斌; 邓义川
Original assignee: Zhejiang Fangzhou Engineering Machinery Equipment Co ltd
Current assignee: Zhejiang Fangzhou Engineering Machinery Equipment Co ltd
Priority date: 2023-12-20
Filing date: 2023-12-20
Publication date: 2024-07-23
Anticipated expiration: 2033-12-20

Abstract

The utility model provides a bucket rod oil cylinder of an excavator, which belongs to the technical field of oil cylinders and comprises a cylinder body, a piston rod and a sealing seat, wherein one end of the cylinder body is provided with an opening, one end of the piston rod penetrates through the opening to extend out of the cylinder body, the outer circular surface of the piston is provided with a first annular groove, a second annular groove, a third annular groove and a fourth annular groove, oil-resistant rings are arranged on the first annular groove and the third annular groove, a first sealing ring is sleeved outside the first sealing ring, a second supporting ring is arranged on the fourth annular groove, a fifth annular groove is arranged on the outer circular surface of the sealing seat, which is close to one side of the cylinder body, a second sealing ring is arranged on the fifth annular groove, a third supporting ring is sleeved outside the second sealing ring, and the inner circular surface of the sealing seat is provided with a retainer ring, a bushing, the first sealing ring, the second sealing ring and a skeleton oil seal.

Description

Excavator bucket rod oil cylinder

Technical Field

The utility model relates to the technical field of oil cylinders, in particular to an excavator bucket rod oil cylinder.

Background

The cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The device has simple structure and reliable operation. When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines. The output force of the oil cylinder is in direct proportion to the effective area of the piston and the pressure difference between two sides of the effective area of the piston; the cylinder basically consists of a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffer device and an exhaust device.

The bucket rod oil cylinder is a hydraulic element for driving the bucket rod of the hydraulic excavator to move, and the telescopic action of the bucket rod oil cylinder can drive the bucket rod to rotate around a hinge point with the movable arm so as to realize various actions required in the excavating process. The utility model discloses a bucket rod hydro-cylinder as in the prior art, is disclosed for the patent of publication number CN211693042U, including a barrel, piston and the piston rod that is one end opening setting, the piston includes a sliding block, sliding block sliding connection is inside the inner chamber of barrel, an annular channel has been seted up on the lateral wall of sliding block, the inside fixedly connected with annular seal pad of annular channel, and sealing mechanism is passed through to the opening part of barrel, and sealing mechanism includes solid fixed ring and the sealing washer of setting in solid fixed ring both sides, but stability is relatively poor when the hydro-cylinder piston rod of this structure stretches out and draws back, and sealing performance is general simultaneously.

Disclosure of utility model

The utility model aims to overcome the defects and the shortcomings of the prior art and provides an excavator bucket rod oil cylinder.

The technical scheme adopted by the utility model is as follows: the utility model provides an excavator bucket rod hydro-cylinder, includes cylinder body, piston and piston rod, cylinder body one end is provided with the opening, the piston slides and sets up in the cylinder body, piston rod and piston connection to one end runs through the opening and extends to outside the cylinder body, still including setting up in open-ended sealing seat, the outer disc of piston has set gradually first annular, second annular, third annular and fourth annular along piston rod direction of stretching out, first annular all is provided with resistant oil ring with the third annular, the second annular is provided with first sealing washer, first sealing washer overcoat is equipped with first holding ring, fourth annular is provided with the second holding ring, the outer disc that the sealing seat is close to cylinder body one side is provided with the fifth annular, the fifth annular is provided with the second sealing washer, the second sealing washer overcoat is equipped with the third holding ring, the inner disc of sealing seat has set gradually retaining ring, bush, first sealing ring, second sealing ring and skeleton oil blanket along piston rod direction of stretching out, first sealing ring and second sealing ring all are provided with annular groove towards cylinder body one side, be provided with the fourth holding ring in the annular groove.

The piston is provided with push rod nut on one side far away from the sealing seat, and is provided with the stop collar on one side close to the sealing seat, push rod nut and stop collar all set up on the piston rod.

The piston rod comprises a piston mounting part and a first flange part, the piston is sleeved on the piston mounting part, one side of the piston mounting part is abutted against the first flange part, and one side of the piston mounting part, which is far away from the first flange part, is provided with a threaded section matched with the push rod nut.

The push rod nut is provided with an inserting block part at one side close to the piston, and the piston is correspondingly provided with a slot part.

The piston rod further comprises a second flange part, a sixth annular groove is formed in the outer circular surface of the first flange part, a third sealing ring is arranged in the sixth annular groove, the first flange part is sleeved on the limiting sleeve, and one side of the limiting sleeve is abutted to the second flange part.

The cylinder body is kept away from the one end of sealing seat and is provided with the connecting seat, be provided with first flange on the connecting seat, be provided with the second flange on the sealing seat, first flange sets up with the second flange looks is perpendicular, all be provided with the oilhole on first flange and the second flange to still can dismantle and be connected with the guard plate.

The push rod nut is provided with a positioning screw hole along the radial direction, and a positioning bolt is arranged in the positioning screw hole.

The stop collar evenly is provided with a plurality of recesses towards the terminal surface of piston, be provided with the lug of looks adaptation on the piston correspondingly.

The beneficial effects of the utility model are as follows: the utility model can greatly improve the sealing performance and the wear resistance of the oil cylinder, simultaneously increase the stability of the movement of the piston rod and prolong the service life of the oil cylinder.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is an exploded view of the present utility model;

FIG. 2 is an exploded view of a piston portion of the present utility model;

FIG. 3 is an exploded view of a seal housing portion of the present utility model;

FIG. 4 is a partial cross-sectional view of the present utility model;

FIG. 5 is an enlarged view of FIG. 1 at A;

FIG. 6 is a schematic view of a push rod nut and a set screw according to the present utility model;

Fig. 7 is a schematic view of a stop collar according to the present utility model.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, it should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used for distinguishing two entities with the same name and non-same parameters, and it is noted that the "first" and "second" are merely for convenience of description, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described in any way.

As shown in fig. 1 to 7, an embodiment of the present utility model is provided:

The utility model provides an excavator bucket rod hydro-cylinder, includes cylinder body 1, piston 2 and piston rod 3, cylinder body 1 one end is provided with the opening, piston 2 slides and sets up in cylinder body 1, piston rod 3 is connected with piston 2 to one end runs through the opening and extends to outside cylinder body 1, still including setting up in open-ended sealing seat 4, piston 2's outer disc has set gradually first annular 5, second annular 6, third annular 7 and fourth annular 8 along piston rod 3 direction of stretching out, first annular 5 and third annular 7 all are provided with oil-resistant ring 9, play the effect of two-way seal at piston 2 both ends, prevent that hydraulic oil from leaking, oil-resistant ring 9 is usually by multilayer material such as polytetrafluoroethylene and rubber etc. second annular 6 is provided with first sealing washer 10, first sealing washer 10 overcoat is equipped with first supporting ring 11, fourth annular 8 is provided with second supporting ring 12, and first sealing washer 10 adopts O shape sealing washer, can constitute multiple seal structure with annular 9, further promotes sealing performance, prevents the infiltration of hydraulic oil of piston 2 both sides, and simultaneously first supporting ring 11 and second supporting ring 12 can promote the smooth motion of piston rod 3 in the process.

The sealing seat 4 is close to the outer disc of cylinder body 1 one side and is provided with fifth annular groove 13, fifth annular groove 13 is provided with second sealing washer 14, and second sealing washer 14 adopts O shape sealing washer, avoids hydraulic oil to leak in cylinder body 1 and sealing seat 4 junction, second sealing washer 14 overcoat is equipped with third support ring 141, the inner disc of sealing seat 4 has set gradually retaining ring 15, bush 16, first sealing ring 17, second sealing ring 18 and skeleton oil blanket 19 along piston rod 3 extension direction, and skeleton oil blanket 19 can prevent outside impurity, water and gas entering cylinder body 1, also can prevent simultaneously that hydraulic oil from escaping, first sealing ring 17 and second sealing ring 18 all are provided with annular groove 20 towards cylinder body 1 one side, be provided with fourth support ring 201 in the annular groove 20, through this structure not only can promote the sealing performance when piston rod 3 moves relative sealing seat 4, avoid hydraulic oil to take place to leak in piston rod 3 and sealing seat 4 junction, can also increase the stability that piston rod 3 removed, has prolonged the life of hydro-cylinder simultaneously.

The piston 2 is provided with push rod nut 22 on the side far away from sealing seat 4, and is provided with stop collar 23 on the side close to sealing seat 4, push rod nut 22 and stop collar 23 all set up on piston rod 3, through piston push rod nut 22 and stop collar 23 with piston 2 location in the appointed position of piston rod 3, avoid it to produce the removal under the pressure of hydraulic oil, promoted the reliability of hydro-cylinder.

The piston rod 3 comprises a piston mounting portion 24 and a first flange portion 25, the piston 2 is sleeved on the piston mounting portion 24, one side of the piston mounting portion is abutted against the first flange portion 25, a threaded section 26 matched with the push rod nut 22 is arranged on one side, away from the first flange portion 25, of the piston mounting portion 24, and therefore the piston 2 is abutted against the first flange portion 25 through the push rod nut 22, and displacement of the piston 2 in the axial direction is avoided.

The push rod nut 22 is provided with an inserting block part 27 near one side of the piston 2, and the piston 2 is correspondingly provided with a slot part 28, so that the positioning effect on the piston 2 is further improved.

The piston rod 3 further comprises a second flange portion 29, a sixth annular groove 251 is formed in the outer circumferential surface of the first flange portion 25, a third sealing ring is arranged in the sixth annular groove 251, the first flange portion 25 is sleeved on the limiting sleeve 23, one side of the limiting sleeve is abutted to the second flange portion 29, the limiting sleeve 23 is positioned in the axial direction of the piston rod 3, the positioning effect on the piston 2 is further improved, and in the assembly process, the limiting sleeve 23 is sleeved at one end of a threaded section 26 of the piston rod 3 first, the piston 2 is then inserted, and then the piston rod is locked through the push rod nut 22, so that the assembly is convenient.

The cylinder body 1 is kept away from the one end of sealing seat 4 and is provided with connecting seat 31, be provided with first flange 32 on the connecting seat 31, be provided with second flange 33 on the sealing seat 4, first flange 32 sets up with second flange 33 looks vertically, and specifically, first flange 32 and second flange 33 all have a connection plane, be convenient for with the pipe connection, all be provided with oilhole 34 on first flange 32 and the second flange 33 to still can dismantle and be connected with guard plate 35, when the hydro-cylinder does not use, seal oilhole 34 through guard plate 35, avoid impurity, foreign matter to get into in the cylinder body 1, influence the normal work of hydro-cylinder.

The push rod nut 22 is provided with a positioning screw hole 36 along the radial direction, a positioning bolt 37 is arranged in the positioning screw hole 36, and after the push rod nut 22 is screwed, the push rod nut is locked through the positioning bolt 37, so that the piston rod 3 is prevented from loosening when the piston rod stretches.

The stop collar 23 evenly is provided with a plurality of recesses 38 towards the terminal surface of piston 2, be provided with the lug of looks adaptation on the piston 2 for stop collar 23 and piston 2 relative positioning reduce the probability that piston 2 takes place the pivoted when moving.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims

1. The utility model provides an excavator bucket rod hydro-cylinder, includes cylinder body (1), piston (2) and piston rod (3), cylinder body (1) one end is provided with the opening, piston (2) slip sets up in cylinder body (1), piston rod (3) are connected with piston (2) to one end runs through the opening and extends to outside cylinder body (1), its characterized in that still including setting up in open-ended sealing seat (4), the excircle face of piston (2) has set gradually first annular (5), second annular (6), third annular (7) and fourth annular (8) along piston rod (3) direction of stretching out, first annular (5) all are provided with resistant oil ring (9) with third annular (7), second annular (6) are provided with first sealing washer (10), first sealing washer (10) overcoat is equipped with first supporting ring (11), fourth annular (8) are provided with second supporting ring (12), the excircle face that sealing seat (4) are close to cylinder body (1) one side is provided with fifth (13), fifth annular (13) are provided with sealing washer (14) and second annular (14) are provided with sealing washer (14) and sealing washer (14) are provided with sealing washer (141) along the direction of stretching out in proper order The novel sealing device comprises a bushing (16), a first sealing ring (17), a second sealing ring (18) and a framework oil seal (19), wherein annular grooves (20) are formed in one sides, facing the cylinder body (1), of the first sealing ring (17) and the second sealing ring (18), and fourth supporting rings (201) are arranged in the annular grooves (20).

2. The excavator bucket rod oil cylinder according to claim 1, characterized in that a push rod nut (22) is arranged on one side of the piston (2) far away from the sealing seat (4), a limit sleeve (23) is arranged on one side of the piston close to the sealing seat (4), and the push rod nut (22) and the limit sleeve (23) are both arranged on the piston rod (3).

3. The excavator bucket rod cylinder according to claim 2, characterized in that the piston rod (3) comprises a piston mounting portion (24) and a first flange portion (25), the piston (2) is sleeved on the piston mounting portion (24) and one side of the piston mounting portion (24) is abutted against the first flange portion (25), and a threaded section (26) matched with the push rod nut (22) is arranged on the side, away from the first flange portion (25), of the piston mounting portion (24).

4. The excavator bucket rod oil cylinder according to claim 3, wherein an insert block portion (27) is arranged on one side of the push rod nut (22) close to the piston (2), and an insert groove portion (28) is correspondingly arranged on the piston (2).

5. The excavator bucket rod cylinder according to claim 3, wherein the piston rod (3) further comprises a second flange portion (29), a sixth annular groove (251) is formed in the outer circumferential surface of the first flange portion (25), a third sealing ring is arranged in the sixth annular groove (251), the first flange portion (25) is sleeved with the limiting sleeve (23), and one side of the limiting sleeve is abutted against the second flange portion (29).

6. The excavator bucket rod oil cylinder according to claim 2, characterized in that one end of the cylinder body (1) far away from the sealing seat (4) is provided with a connecting seat (31), a first flange (32) is arranged on the connecting seat (31), a second flange (33) is arranged on the sealing seat (4), the first flange (32) is perpendicular to the second flange (33), oil holes (34) are formed in the first flange (32) and the second flange (33), and a protection plate (35) is detachably connected.

7. The excavator bucket rod cylinder according to claim 2, characterized in that the push rod nut (22) is provided with positioning screw holes (36) in the radial direction, and positioning bolts (37) are arranged in the positioning screw holes (36).

8. The excavator bucket rod oil cylinder according to claim 2, characterized in that a plurality of grooves (38) are uniformly formed in the end face, facing the piston (2), of the limit sleeve (23), and the piston (2) is correspondingly provided with an adaptive protruding block.