CN217381094U

CN217381094U - Excavator bucket rod oil cylinder

Info

Publication number: CN217381094U
Application number: CN202220453594.1U
Authority: CN
Inventors: 姜民; 曾宥银; 耿大伟
Original assignee: Jiangsu Lixueda Hydraulic Co ltd
Current assignee: Jiangsu Lixueda Hydraulic Co ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-09-06
Anticipated expiration: 2032-03-04

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to excavator bucket rod hydro-cylinder, including the cylinder body, the uide bushing is installed to the one end of cylinder body, and the other end and the cylinder bottom integrated into one piece, slidable mounting has the piston in the cylinder body, the tip that the piston kept away from the cylinder bottom is connected with the one end of piston rod, the other end of piston rod passes the uide bushing and extends outside the cylinder body, piston rod and uide bushing sliding fit, the terminal surface that the piston is close to the cylinder bottom is fixed with the buffering post, the cylinder bottom is equipped with the buffer hole with buffering post looks adaptation, be equipped with the bolster in the buffer hole, the uide bushing is close to the terminal surface of piston and is embedded to have first annular magnetic path, the terminal surface that the piston is close to the uide bushing is embedded to have second annular magnetic path, first annular magnetic path and second annular magnetic path repel each other; the utility model discloses have buffer function to great impact force, operate steadily, long service life and sealed effectual.

Description

Excavator bucket rod oil cylinder

Technical Field

The utility model relates to a hydraulic cylinder technical field, in particular to excavator dipper hydro-cylinder.

Background

The excavator is a widely-used multifunctional construction machine, the bucket rod oil cylinder is a hydraulic element for driving the bucket rod of the excavator to move, and the bucket rod is driven to rotate around a hinge point of a movable arm through the extension and contraction of a piston rod so as to realize various excavating actions.

When the excavator works, when the bucket rod oil cylinder receives external large acting force, large impact force is easily generated on the bucket rod oil cylinder, and the piston rod drives the piston to run at high speed. Most of the existing bucket rod oil cylinders are not provided with a buffer mechanism for buffering the high speed of the piston, or are provided with a buffer mechanism but have a common buffer effect, so that the piston rod drives the piston to violently collide with the guide sleeve or the cylinder bottom by a large impact force, the running stability of the bucket rod oil cylinder is reduced, and the service life of the bucket rod oil cylinder is adversely affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defect and not enough that prior art exists, providing one kind and having buffer function to great impact force, operate steadily, long service life and sealed effectual excavator dipper hydro-cylinder.

Realize the utility model discloses the technical scheme of purpose is: the utility model provides an excavator bucket rod hydro-cylinder, includes the cylinder body, the uide bushing is installed to the one end of cylinder body, the other end and cylinder bottom integrated into one piece, slidable mounting has the piston in the cylinder body, the tip that the cylinder bottom was kept away from to the piston is connected with the one end of piston rod, the other end of piston rod passes the uide bushing and extends to outside the cylinder body, piston rod and uide bushing sliding fit, the terminal surface that the piston is close to the cylinder bottom is fixed with the buffering post, the cylinder bottom is equipped with the buffer hole with buffering post looks adaptation, be equipped with the bolster in the buffer hole, the uide bushing is close to the terminal surface of piston and is embedded to have first annular magnetic path, the terminal surface that the piston is close to the uide bushing is embedded to have the second annular magnetic path, first annular magnetic path and second annular magnetic path repel each other.

Furthermore, the bolster is two lacing wires, the both ends relatively fixed in the inner wall of buffer hole opening part of lacing wire, two the lacing wire alternately forms the cross.

Furthermore, the inner circumferential wall of the guide sleeve is sequentially provided with a first groove, a second groove and a third groove along the axial direction, a dustproof ring is arranged in the first groove, a support ring is arranged in the second groove, a seal ring is arranged in the third groove, and the dustproof ring, the support ring and the seal ring are respectively abutted against the outer circumferential wall of the piston rod.

Furthermore, an annular groove is formed in the outer circumferential wall of the piston, an annular sealing gasket is arranged in the annular groove, and the annular sealing gasket is abutted against the inner circumferential wall of the cylinder body.

Further, the buffer column is made of an elastic material.

Furthermore, a first oil inlet is formed in the end portion, close to the guide sleeve, of the cylinder body, the first oil inlet is communicated with the rod cavity, a second oil inlet is formed in the end portion, close to the cylinder bottom, of the cylinder body, and the second oil inlet is communicated with the rodless cavity.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) the utility model buffers the larger impact force received by the bucket rod oil cylinder through the mutual repulsion of the first annular magnetic block and the second annular magnetic block and the arrangement of the buffer column and the lacing wire, thereby improving the operation stability of the bucket rod oil cylinder and prolonging the service life of the bucket rod oil cylinder;

(2) the utility model discloses a setting up of cylinder body and cylinder bottom integrated into one piece and dust ring and sealing washer makes the dipper hydro-cylinder have good sealed effect, has avoided revealing of hydraulic oil in the dipper hydro-cylinder.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the guide sleeve of the present invention;

fig. 3 is a schematic view of the piston of the present invention;

fig. 4 is a side view of the buffer of the present invention.

In the figure: the cylinder body 1, the guide sleeve 2, the cylinder bottom 3, the piston 4, the piston rod 5, the buffer 7, the first oil inlet 11, the rod cavity 12, the second oil inlet 13, the rodless cavity 14, the first groove 21, the second groove 22, the third groove 23, the dust ring 24, the support ring 25, the seal ring 26, the annular groove 41, the annular seal gasket 42, the buffer column 61, the buffer hole 62, the lacing wire 71, the first annular magnetic block 81 and the second annular magnetic block 82.

Detailed Description

As shown in fig. 1-4, an excavator bucket rod oil cylinder comprises a cylinder body 1, one end of the cylinder body 1 is provided with a guide sleeve 2, the other end of the cylinder body 1 is integrally formed with a cylinder bottom 3, a piston 4 is slidably mounted in the cylinder body 1, the end part, far away from the cylinder bottom 3, of the piston 4 is connected with one end of a piston rod 5, the other end of the piston rod 5 penetrates through the guide sleeve 2 and extends out of the cylinder body 1, the piston rod 5 is in sliding fit with the guide sleeve 2, the end part, close to the guide sleeve 2, of the cylinder body 1 is provided with a first oil inlet 11, the first oil inlet 11 is communicated with a rod cavity 12, the end part, close to the cylinder bottom 3, of the cylinder body 1 is provided with a second oil inlet 13, and the second oil inlet 13 is communicated with a rodless cavity 14; a buffer column 61 is fixed on the end face of the piston 4 close to the cylinder bottom 3, the buffer column 61 is made of elastic materials, a buffer hole 62 matched with the buffer column 61 is formed in the cylinder bottom 3, a buffer member 7 is arranged in the buffer hole 62, the buffer member 7 is two tie bars 71, two ends of each tie bar 71 are oppositely fixed on the inner wall of an opening of the buffer hole 62, the two tie bars 71 are crossed to form a cross shape, the buffer column 61 and the tie bars 71 are arranged to buffer large impact force applied to the bucket rod oil cylinder, and severe collision between the piston 4 and the cylinder bottom 3 is avoided; a first annular magnet 81 is embedded in the end face, close to the piston 4, of the guide sleeve 2, a second annular magnet 82 is embedded in the end face, close to the guide sleeve 2, of the piston 4, the first annular magnet 81 and the second annular magnet 82 repel each other, the arrangement of the first annular magnet 81 and the second annular magnet 82 buffers large impact force on the bucket rod oil cylinder, and severe collision between the piston 4 and the guide sleeve 2 is avoided; the inner circumferential wall of the guide sleeve 2 is sequentially provided with a first groove 21, a second groove 22 and a third groove 23 along the axial direction, a dustproof ring 24 is arranged in the first groove 21, a support ring 25 is arranged in the second groove 22, a seal ring 26 is arranged in the third groove 23, the dustproof ring 24, the support ring 25 and the seal ring 26 are respectively abutted against the outer circumferential wall of the piston rod 5, and the arrangement of the dustproof ring 24 and the seal ring 26 not only prevents external dust from entering the bucket rod oil cylinder, but also prevents hydraulic oil in the bucket rod oil cylinder from leaking; the outer circumferential wall of the piston 4 is provided with an annular groove 41, an annular sealing gasket 42 is arranged in the annular groove 41, the annular sealing gasket 42 is abutted against the inner circumferential wall of the cylinder body 1, and the arrangement of the annular sealing gasket 42 avoids series flow of hydraulic oil in the rod cavity 12 and hydraulic oil in the rodless cavity 14.

In actual operation, when hydraulic oil enters the rod cavity 12 from the first oil inlet 11, the hydraulic oil pushes the piston 4 to move towards the cylinder bottom 3, when the piston 4 is close to the cylinder bottom 3, the buffer column 61 firstly enters the buffer hole 62, the buffer column 61 extrudes the tie bar 71 in the buffer hole 62 along with the continuous movement of the piston 4, the tie bar 71 limits the buffer column 61 to continuously enter the buffer hole 62 due to the tensile force of the tie bar 71, the deeper the depth of the buffer column 61 entering the buffer hole 62 is, the larger the tensile force of the tie bar 71 is, the slower the entering speed of the buffer column 61 is, so that the operating speed of the piston 4 is slowed down, and the piston 4 is prevented from violently colliding with the cylinder bottom 3; when hydraulic oil enters the rodless cavity 14 from the second oil inlet 12, the hydraulic oil pushes the piston 4 to move towards the guide sleeve 2, when the piston 4 approaches the guide sleeve 2 quickly, the first annular magnetic block 81 and the second annular magnetic block 82 repel each other to limit the piston 4 to continue approaching the guide sleeve 2, and along with the approaching of the piston 4 and the guide sleeve 2, the repelling acting force of the first annular magnetic block 81 and the second annular magnetic block 82 is larger, so that the operating speed of the piston 4 is slowed down, and the piston 4 is prevented from colliding with the guide sleeve 2 violently.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an excavator bucket rod hydro-cylinder, includes cylinder body (1), uide bushing (2) are installed to the one end of cylinder body (1), the other end and cylinder bottom (3) integrated into one piece, slidable mounting has piston (4) in cylinder body (1), the tip that cylinder bottom (3) were kept away from in piston (4) is connected with the one end of piston rod (5), the other end of piston rod (5) passes uide bushing (2) and extends to outside cylinder body (1), piston rod (5) and uide bushing (2) sliding fit, its characterized in that: the terminal surface that piston (4) are close to cylinder bottom (3) is fixed with buffering post (61), cylinder bottom (3) are equipped with buffer hole (62) with buffering post (61) looks adaptation, be equipped with bolster (7) in buffer hole (62), the terminal surface that uide bushing (2) are close to piston (4) is embedded to have first annular magnetic path (81), the terminal surface that piston (4) are close to uide bushing (2) is embedded to have second annular magnetic path (82), first annular magnetic path (81) and second annular magnetic path (82) repulsion each other.

2. The excavator arm cylinder of claim 1, wherein: bolster (7) are two lacing wires (71), the both ends relatively fixed in the inner wall of buffer hole (62) opening part of lacing wire (71), two lacing wire (71) alternately form the cross.

3. The excavator arm cylinder of claim 1, wherein: the inner circumferential wall of the guide sleeve (2) is sequentially provided with a first groove (21), a second groove (22) and a third groove (23) along the axial direction, a dust ring (24) is arranged in the first groove (21), a support ring (25) is arranged in the second groove (22), a seal ring (26) is arranged in the third groove (23), and the dust ring (24), the support ring (25) and the seal ring (26) are respectively abutted against the outer circumferential wall of the piston rod (5).

4. The excavator arm cylinder of claim 1, wherein: the outer circumferential wall of the piston (4) is provided with an annular groove (41), an annular sealing gasket (42) is arranged in the annular groove (41), and the annular sealing gasket (42) is abutted against the inner circumferential wall of the cylinder body (1).

5. The excavator arm cylinder of claim 1, wherein: the buffer column (61) is made of elastic material.

6. The excavator arm cylinder of any one of claims 1 to 5, wherein: the end part, close to the guide sleeve (2), of the cylinder body (1) is provided with a first oil inlet (11), the first oil inlet (11) is communicated with the rod cavity (12), the end part, close to the cylinder bottom (3), of the cylinder body (1) is provided with a second oil inlet (13), and the second oil inlet (13) is communicated with the rodless cavity (14).