CN218030913U

CN218030913U - Hydraulic self-centering floating buffer sleeve for hydraulic oil cylinder

Info

Publication number: CN218030913U
Application number: CN202222525450.5U
Authority: CN
Inventors: 樊耀华; 符江; 火霏; 王鹏飞; 王艳丽; 刘炳坤
Original assignee: Xuzhou XCMG Hydraulics Co Ltd
Current assignee: Xuzhou XCMG Hydraulics Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-13
Anticipated expiration: 2032-09-23

Abstract

The utility model relates to a hydraulic pressure is from unsteady cushion collar of centering formula for hydraulic cylinder belongs to hydraulic cylinder technical field. The buffer sleeve comprises a buffer sleeve body, wherein a plurality of pressure equalizing grooves are formed in the outer circle of the buffer sleeve body, and a plurality of axial oil grooves are formed in the outer circle of the buffer sleeve body in the axial direction. The pressure equalizing grooves are communicated with each other through the axial oil grooves, and the pressure of the pressure equalizing grooves is consistent after the pressure equalizing grooves are communicated with each other through the axial oil grooves. The beneficial effects of the utility model are that: the pressure equalizing grooves are communicated with each other axially, the pressure on the annular surface is equal everywhere, the outer circle of the buffer sleeve cannot generate radial resultant force, the buffer sleeve is not easy to be clamped to one side, and the buffer sleeve is always in a better lubricating state surrounded by oil liquid; after the buffer sleeve enters the inner hole of the guide sleeve, high-pressure oil liquid always exists in each pressure equalizing groove, the buffer sleeve is guaranteed to be automatically centered in the inner hole of the guide sleeve under the action of the high-pressure oil liquid, the hydraulic self-centering effect is achieved, the buffer sleeve is prevented from being clamped in the inner hole of the guide sleeve, the matching surface is prevented from being scratched, and the reliability is high.

Description

Hydraulic self-centering floating buffer sleeve for hydraulic oil cylinder

Technical Field

The utility model relates to a hydraulic pressure is from centering formula buffer sleeve that floats for hydraulic cylinder belongs to hydraulic cylinder technical field.

Background

The restriction is realized through cushion collar and uide bushing cooperation in the buffering of hydraulic cylinder front chamber, cushion collar excircle and uide bushing hole fit clearance are minimum, general clearance size is within 0.05mm, cause the cushion collar can't smoothly get into the uide bushing hole for avoiding part axiality deviation in the course of working, the problem of cushion collar excircle eccentric wear, therefore the cushion collar design is floating, cushion collar hole and piston rod excircle clearance are far greater than cushion collar excircle and uide bushing hole clearance, rely on cushion collar front end excircle chamfer to identify to a great extent when the cushion collar advances into the uide bushing hole, but on super large-scale hydraulic cylinder, the cushion collar specification is all bigger, the cushion collar is seriously erroneous tendency one side under the dead weight effect, the chamfer at first produces the collision when causing the cushion collar to advance into the uide bushing hole easily, eccentric wear.

"a compound percussion drilling tool (CN 201820116015.8)" that current patent was mainly applied for by china petrochemical industry limited company petroleum engineering technical research institute, the utility model provides a compound percussion drilling tool, including strikeing cavity and axial impact hammer, the axial impact hammer install in the impact cavity to will strike the cavity and separate into forward impact chamber and reverse impact chamber, still including locating the cushion collar of forward impact chamber one end, be equipped with the damping clearance that is used for weakening axial impact hammer reverse impact work when axial impact hammer reverse stroke between cushion collar and the axial impact hammer, be equipped with backflow channel on the inside wall at axial impact hammer both ends, work as when the axial impact hammer gets into the damping clearance, the forward impact chamber pass through the damping clearance with the backflow channel intercommunication that the axial impact hammer corresponds one end. The similar patent is used in the field of non-hydraulic oil cylinders; the structure of the buffer sleeve of the similar patent is different from that of the buffer sleeve of the patent; no pressure equalizing groove is designed on the buffer sleeve of the similar patent; the pressure equalizing grooves designed on the axial punch hammer are not communicated with each other, so that the pressure between the pressure equalizing grooves at the front end and the pressure equalizing grooves at the rear end are different, floating type is not mentioned in the similar patents, and the use reliability is influenced by the coaxiality caused by machining deviation.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a hydraulic pressure is from centering formula buffer sleeve that floats for hydraulic cylinder

The utility model discloses a realize through following technical scheme: the utility model provides a hydraulic pressure is from centering formula buffer sleeve that floats for hydraulic cylinder which characterized in that: the buffer sleeve comprises a buffer sleeve body, wherein a plurality of pressure equalizing grooves are formed in the outer circle of the buffer sleeve body, and a plurality of axial oil grooves are formed in the outer circle of the buffer sleeve body in the axial direction.

The axial distribution of the pressure equalizing grooves on the buffer sleeve body is uniform distribution or nonuniform distribution.

The axial oil grooves on the buffer sleeve body are 3, and the 3 axial oil grooves are uniformly distributed on the circumference.

The pressure equalizing grooves are communicated with each other through axial oil grooves.

The pressure equalizing grooves are communicated with each other through the axial oil grooves, and then the pressure of the equalizing grooves is consistent.

The utility model has the advantages that: because the pressure equalizing grooves are annularly sealed for one circle in structure, and simultaneously the pressure equalizing grooves at the front end and the rear end are communicated with each other in the axial direction, the pressure on the annular surface is equal everywhere, so that the radial resultant force cannot be generated on the outer circle of the buffer sleeve, and the situation that the buffer sleeve is clamped to one side is not easy to occur, so that the buffer sleeve is always in a better lubricating state in oil liquid surrounding; meanwhile, after the buffer sleeve enters the inner hole of the guide sleeve, the axial oil grooves are communicated with the pressure equalizing grooves, so that high-pressure oil liquid always exists in the pressure equalizing grooves, the buffer sleeve is guaranteed to be automatically centered in the inner hole of the guide sleeve under the action of the high-pressure oil liquid, the hydraulic self-centering effect is realized, the buffer sleeve is prevented from being stuck in the inner hole of the guide sleeve, the matching surface is prevented from being scratched, and the reliability is high.

Drawings

The invention will be further explained below with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of an axial oil groove of the present invention;

fig. 4 is a reference diagram of the usage state of the present invention.

In the figure: 1. a cushion collar body; 2. a pressure equalizing groove; 3. an axial oil groove; 4. and a guide sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. 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 the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, 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.

The hydraulic self-centering floating buffer sleeve for the hydraulic oil cylinder shown in the figures 1 to 3 is characterized in that: including the cushion collar body 1, be equipped with a plurality of pressure-equalizing grooves 2 on the excircle of cushion collar body 1, the excircle axial of cushion collar body 1 is equipped with a plurality of axial oil grooves 3.

The axial distribution of the pressure equalizing grooves 2 on the buffer sleeve body 1 is uniform distribution or non-uniform distribution.

Axial oil groove 3 on the cushion collar body 1 establish to 3, 3 equipartitions on the axial oil groove 3 circumference.

The pressure equalizing grooves 2 are communicated with each other through axial oil grooves 3.

The pressure equalizing grooves 2 are communicated with each other through the axial oil grooves 3, and then the pressure equalizing grooves 2 are consistent in pressure. Because the pressure equalizing grooves 2 are structurally in a ring-shaped closed circle, the pressure equalizing grooves 2 at the front end and the rear end are communicated with each other in the axial direction, the Pascal's theorem shows that the pressure on the annular surface is equal everywhere, so that radial resultant force cannot be generated on the outer circle of the buffer sleeve body 1, the buffer sleeve is not easy to clamp to one side, the buffer sleeve is always in a better lubricating state by surrounding oil liquid, and meanwhile, after the buffer sleeve body 1 enters the inner hole of the guide sleeve 4, the pressure equalizing grooves 2 are communicated with each other through the axial oil grooves 3, so that high-pressure oil liquid always exists in each pressure equalizing groove 2, the buffer sleeve is ensured to be automatically centered in the inner hole of the guide sleeve 4 under the action of the high-pressure oil liquid, the hydraulic self-centering effect is realized, the buffer sleeve is prevented from being clamped in the inner hole of the guide sleeve 4, the matching surface is prevented from being scratched, and the reliability of the hydraulic oil cylinder is improved.

The inner hole of the buffer sleeve is sleeved with the outer circle of the piston rod 5, the buffer sleeve enters the guide sleeve 4, the pressure equalizing grooves 2 are in annular closed circles in structure, and meanwhile, the pressure equalizing grooves 2 at the front end and the rear end are communicated with each other in the axial direction, so that the pressure on the annular surface is equal everywhere, radial resultant force cannot be generated on the outer circle of the buffer sleeve, and the buffer sleeve is not easy to be clamped to one side and is always in a better lubricating state in oil liquid surrounding; meanwhile, after the buffer sleeve enters the inner hole of the guide sleeve 4, the axial oil grooves are communicated with the pressure equalizing grooves, so that high-pressure oil liquid always exists in the pressure equalizing grooves, the buffer sleeve is guaranteed to be automatically centered in the inner hole of the guide sleeve under the action of the high-pressure oil liquid, the hydraulic self-centering effect is realized, the buffer sleeve is prevented from being clamped in the inner hole of the guide sleeve, the matching surface is prevented from being scratched, and the reliability is high.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions on some technical features, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a hydraulic pressure is from centering formula buffer sleeve that floats for hydraulic cylinder which characterized in that: the buffer sleeve comprises a buffer sleeve body (1), wherein a plurality of pressure equalizing grooves (2) are formed in the outer circle of the buffer sleeve body (1), and a plurality of axial oil grooves (3) are formed in the outer circle of the buffer sleeve body (1) in the axial direction.

2. The hydraulic self-centering floating buffer sleeve for the hydraulic oil cylinder according to claim 1, is characterized in that: the axial distribution of the pressure equalizing grooves (2) on the buffer sleeve body (1) is uniform distribution or non-uniform distribution.

3. The hydraulic self-centering floating cushion collar for the hydraulic oil cylinder according to claim 1, is characterized in that: axial oil grooves (3) on the buffer sleeve body (1) are arranged into 3 channels, and the 3 channels are uniformly distributed on the circumference of the axial oil grooves (3).

4. The hydraulic self-centering floating buffer sleeve for the hydraulic oil cylinder according to claim 1, is characterized in that: the pressure equalizing grooves (2) are communicated with each other through axial oil grooves (3).

5. The hydraulic self-centering floating cushion collar for the hydraulic oil cylinder according to claim 4, is characterized in that: the pressure equalizing grooves (2) are communicated with each other through the axial oil grooves (3), and then the pressure equalizing grooves (2) are consistent.