CN217107670U - Mechanical locking supporting leg oil cylinder structure - Google Patents

Abstract

The utility model discloses a mechanical locking landing leg hydro-cylinder structure. Relates to the technical field of hydraulic pressure. The oil cylinder structure comprises a cylinder body assembly and a piston assembly; the upper end of the piston assembly extends into the cylinder assembly and is hermetically connected with the cylinder assembly, and a part of the cylinder assembly, which is positioned above the piston assembly, forms a rodless cavity; the lower extreme of piston assembly stretches out in the bottom opening of cylinder body subassembly, sets up the screw thread section on the lateral surface of piston assembly's lower extreme, and threaded connection has lock nut on the screw thread section, and lock nut can reciprocate on the screw thread section through the screw-thread fit with the screw thread section to make lock nut upwards support the cylinder body subassembly. When the piston assembly extends to the required stroke, the locking nut is rotated to enable the piston assembly to move upwards to abut against the cylinder body assembly, the locking nut abuts against the cylinder body assembly, the piston assembly cannot retract into the cylinder body, the oil cylinder is thoroughly and mechanically locked, and the problem that the oil cylinder descends due to internal leakage of the support oil cylinder which is supported for a long time can be solved.

Description

Mechanical locking supporting leg oil cylinder structure

Technical Field

The utility model relates to the field of hydraulic techniques, in particular to mechanical locking landing leg hydro-cylinder structure.

Background

Hydraulic cylinders are used as important actuators in hydraulic systems and are widely used in various devices. The oil cylinder has various functions in the whole vehicle, such as supporting the whole vehicle, supporting the arm support and the like. When the oil cylinder plays a supporting role, the oil cylinder is required to have very small or even zero leakage, so that the oil cylinder does not descend, and the supporting legs, the arm support and other mechanisms are driven not to descend. Although various sealing elements are arranged in the piston inside the oil cylinder to keep the oil cylinder from leaking inwards, in practice, the sealing elements only minimize the leakage inwards of the oil cylinder, and the zero leakage inwards cannot be really realized. In a short time, the small internal leakage of the oil cylinder has little influence on the working state of the whole vehicle, but for the whole vehicle which keeps an action for a long time, for example, a month or even longer, and the oil cylinder keeps an action, the influence of the internal leakage on the whole vehicle is very large, because the time is long, the decline is accumulated to be very large, the whole vehicle descends very much, and in a serious case, the oil cylinder cannot play a supporting role at all, and the oil cylinder needs to be replenished again to play a role.

Therefore, how to solve the problem of cylinder drop caused by normal internal leakage of the cylinder is a technical problem to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a mechanical locking landing leg hydro-cylinder structure, the normal hydro-cylinder that leads to of leaking descends problem, simple feasible in the mode of accessible mechanical locking is solved the hydro-cylinder.

Another object of the present invention is to provide a portable electronic device including the above.

In order to achieve the above object, the utility model provides a following technical scheme:

a mechanical locking support leg oil cylinder structure comprises a cylinder body assembly and a piston assembly; the upper end of the piston assembly extends into the cylinder assembly and is connected with the cylinder assembly in a sealing way, and a part of the cylinder assembly above the piston assembly forms a rodless cavity; the lower end of the piston assembly extends out of the bottom opening of the cylinder body assembly, a threaded section is arranged on the outer side face of the lower end of the piston assembly, a locking nut is connected to the threaded section in a threaded mode, and the locking nut can vertically move on the threaded section through being matched with threads of the threaded section, so that the locking nut upwards supports against the cylinder body assembly.

Preferably, the cylinder assembly comprises a cylinder, an annular guide sleeve and an annular gland; the upper end of the guide sleeve extends into the cylinder body through the lower port of the cylinder body and is fixed on the inner side surface of the cylinder body, and the lower end of the guide sleeve is positioned on the outer side of the cylinder body; the gland is positioned on the outer side of the cylinder body and is fixedly butted with the lower end of the guide sleeve; the upper end of the piston assembly extends into the cylinder body and is connected with the cylinder body in a sealing mode, and the part, located above the piston assembly, in the cylinder body forms the rodless cavity; the lower end of the piston assembly extends downwards through the middle through hole of the guide sleeve and the middle through hole of the gland; the locking nut is propped against the cylinder body component upwards through propping against the gland.

Preferably, the upper end of the gland is sleeved outside the lower end of the guide sleeve, a positioning groove is formed in the outer side surface of the lower end of the guide sleeve, and a positioning hole is formed in the gland in a penetrating mode; and a steel ball and a set screw are arranged in the positioning hole, part of the structure of the steel ball is positioned in the positioning groove, the rest part of the structure of the steel ball is positioned in the positioning hole, and the set screw is in threaded connection with an opening of the positioning hole so as to position the steel ball in the positioning hole.

Preferably, the gland is integrally formed with the guide sleeve.

Preferably, the gland is fixedly connected with the guide sleeve in a threaded manner.

Preferably, a sealing ring is sleeved on the outer side face of the upper end of the piston assembly, and the piston assembly is connected to the cylinder assembly in a sealing manner through the sealing ring.

Preferably, a blocking structure is further fixedly arranged on the outer side surface of the lower end of the piston assembly, and the blocking structure is located below the locking nut, so that the locking nut moves downwards at most to abut against the blocking structure on the piston assembly.

Preferably, the blocking structure is a shaft retainer ring clamped and fixed on the groove of the piston assembly.

Preferably, the blocking structure is a pin welded to the piston assembly.

Preferably, the blocking structure is a bolt threadedly coupled to the piston assembly.

The utility model provides a mechanical locking support leg oil cylinder structure, which comprises a cylinder body component and a piston component; the upper end of the piston assembly extends into the cylinder assembly and is hermetically connected with the cylinder assembly, and a part of the cylinder assembly, which is positioned above the piston assembly, forms a rodless cavity; the lower extreme of piston assembly stretches out in the bottom opening of cylinder body subassembly, sets up the screw thread section on the lateral surface of piston assembly's lower extreme, and threaded connection has lock nut on the screw thread section, and lock nut can reciprocate on the screw thread section through the screw-thread fit with the screw thread section to make lock nut upwards support the cylinder body subassembly.

When the piston assembly extends to the required stroke, the locking nut is rotated to enable the piston assembly to move upwards to abut against the cylinder body assembly, the locking nut abuts against the cylinder body assembly, so that the piston assembly cannot retract into the cylinder body, no matter whether the oil cylinder leaks inwards, the oil cylinder cannot have any action, the oil cylinder is thoroughly and mechanically locked, and the problem that the oil cylinder descends due to internal leakage of the support leg oil cylinder which is supported for a long time can be solved.

Drawings

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

Fig. 1 is a cross-sectional view of a first embodiment of a mechanical locking support oil cylinder structure provided by the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic view of a mechanical locking leg cylinder structure according to an embodiment of the present invention when a locking nut is located at the bottom end of a threaded section;

fig. 4 is a schematic diagram of a mechanical locking support leg oil cylinder structure according to a first embodiment of the present invention when a locking nut performs mechanical limiting;

fig. 5 is a schematic diagram of a mechanical locking support leg oil cylinder structure according to a first embodiment of the present invention when the locking nut is not mechanically limited and the inside of the oil cylinder is vented;

fig. 6 is a partially enlarged view of a second embodiment of the mechanical locking leg cylinder structure provided by the present invention;

fig. 7 is a partially enlarged view of a third embodiment of the mechanical locking support leg oil cylinder structure provided by the present invention;

fig. 8 is a partially enlarged view of a fourth embodiment of the mechanical locking support oil cylinder structure provided by the present invention.

Reference numerals:

the piston rod comprises a piston rod 1, a shaft retainer ring 2, a locking nut 3, a gland 4, a positioning hole 41, a set screw 5, a steel ball 6, a guide sleeve 7, a positioning groove 71, a cylinder body 8, a rodless cavity 81, a rod cavity 82, a piston sealing ring I9, a piston 10, a piston sealing ring II 11, a thread section 12, a flange 13, a pin shaft 14 and a piston assembly 15.

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.

The core of the utility model is to provide a mechanical locking landing leg hydro-cylinder structure, the hydro-cylinder decline problem that leads to is let out in the mode of accessible mechanical locking is solved the hydro-cylinder is normal, and is simple feasible.

The utility model provides a machinery locking landing leg hydro-cylinder structure's concrete embodiment one, please refer to fig. 1 to 6, including cylinder body subassembly and piston assembly 15. The upper end of the piston assembly 15 extends into and is sealingly connected to the cylinder assembly, the portion of the cylinder assembly above the piston assembly 15 forming a rodless chamber 81. The lower extreme of piston assembly 15 stretches out in the bottom opening of cylinder body subassembly, sets up screw thread section 12 on the lateral surface of the lower extreme of piston assembly 15, and threaded connection has lock nut 3 on screw thread section 12, and lock nut 3 can reciprocate on screw thread section 12 through the screw-thread fit with screw thread section 12 to make lock nut 3 upwards support the cylinder body subassembly.

Wherein, the piston assembly 15 comprises a piston rod 1 and a piston 10 fixed at the top end of the piston rod 1, and the cylinder 8 forms a rodless cavity 81 above the piston assembly 15 through the sealing between the piston 10 and the inner side surface of the cylinder assembly. A threaded section 12 is provided on the piston rod 1.

As shown in fig. 3, the cylinder assembly is connected to the entire vehicle through the flange 13, the cylinder 8 is in a fixed state, and when the hydraulic system inputs hydraulic oil to the rodless cavity 81 to pressurize, the piston rod 1 drives the piston 10 to extend outward together, so that the entire vehicle is supported by the plurality of leg cylinders.

When the piston assembly 15 extends to a required stroke, for example, the piston rod 1 just extends to the bottom, the locking nut 3 is located at the bottom end of the threaded section 12 of the piston rod 1, at this time, the cylinder is not mechanically locked, if the locking nut 3 is not moved all the time, after the cylinder leaks inwards through the sealing part between the piston assembly 15 and the cylinder body 8, the piston assembly 15 retracts, as shown in fig. 5, if the continuous working time is longer, the piston rod 1 retracts a lot, and if the continuous working time is longer, the whole support leg cylinder cannot function.

However, when the piston assembly 15 extends to the required stroke, as shown in fig. 4, the locking nut 3 is rotated to move upwards to abut against the cylinder body assembly, the cylinder body assembly is fixedly connected with the support leg flange 13 of the whole vehicle, and the locking nut 3 abuts against the cylinder body assembly, so that the piston assembly 15 cannot retract into the cylinder body 8, no matter whether the oil cylinder leaks inwards, the oil cylinder cannot have any action, the oil cylinder is completely and mechanically locked, and the problem that the oil cylinder descends due to internal leakage of the support leg oil cylinder supported for a long time can be solved.

Further, the cylinder assembly comprises a cylinder 8, an annular guide sleeve 7 and an annular gland 4. Wherein, the cylinder body 8 is arranged on the whole vehicle through a flange 13. The upper end of the guide sleeve 7 extends into the cylinder body 8 through the lower port of the cylinder body 8 and is fixed on the inner side surface of the cylinder body 8, and the lower end of the guide sleeve 7 is positioned on the outer side of the cylinder body 8. The gland 4 is positioned on the outer side of the cylinder body 8, and the gland 4 is in butt joint with and fixed at the lower end of the guide sleeve 7. The upper end of the piston assembly 15 extends into the cylinder 8 and is connected with the cylinder 8 in a sealing way, and the part of the cylinder 8 above the piston assembly 15 forms a rodless cavity 81. The lower end of the piston assembly 15 extends downwards through the middle through hole of the guide sleeve 7 and the middle through hole of the gland 4. The locking nut 3 is abutted with the gland 4 to abut against the cylinder body assembly upwards.

The guide sleeve 7 can ensure the smooth up-and-down movement of the piston assembly 15, the arrangement of the gland 4 can prevent the locking nut 3 from directly extruding the cylinder body 8, and when the locking nut 3 rotates to move upwards in the thread section 12, the locking nut can finally directly abut against the gland 4, so that the service life of the cylinder body 8 can be prolonged. Under the state that the locking nut 3 is abutted against the gland 4, if the piston assembly 15 tends to retract upwards, the locking nut 3 presses the gland 4 upwards, the gland 4 transmits the force of the locking nut 3 to the guide sleeve 7, and the guide sleeve 7 transmits the force to the cylinder body 8 to prevent the piston assembly 15 from moving upwards, so that the mechanical locking of the locking nut 3 on the piston assembly 15 is realized. Of course, in other embodiments, the cylinder assembly may not include the gland 4 and the guide sleeve 7, such that the lock nut 3 is directly against the cylinder 8.

Furthermore, the upper end of the gland 4 is sleeved outside the lower end of the guide sleeve 7, a positioning groove 71 is arranged on the outer side surface of the lower end of the guide sleeve 7, and the gland 4 is provided with a positioning hole 41 in a penetrating manner. The steel ball 6 and the set screw 5 are arranged in the positioning hole 41, part of the structure of the steel ball 6 is located in the positioning groove 71, the rest part of the structure is located in the positioning hole 41, and the set screw 5 is in threaded connection with the opening of the positioning hole 41 so as to position the steel ball 6 in the positioning hole 41. The gland 4 can be reliably fixed by matching the set screw 5 with the steel ball 6, and the gland 4 is prevented from loosening.

Of course, as shown in fig. 6, in the second embodiment, the gland 4 and the guide sleeve 7 are integrally formed, and the structural strength is high. Further alternatively, as shown in fig. 7, in the third embodiment, the gland 4 is screwed and fixed to the guide sleeve 7, so that the attachment and detachment are facilitated.

Further, a sealing ring is sleeved on the outer side face of the upper end of the piston assembly 15, and the piston assembly 15 is connected to the cylinder assembly in a sealing mode through the sealing ring. Specifically, along the up-down direction, a piston sealing ring I9 and a piston sealing ring II 11 are sequentially sleeved on the piston 10, and the piston sealing ring I9 and the piston sealing ring II 11 form a sealing system of the oil cylinder together to prevent the oil cylinder from leaking inwards. Of course, in other embodiments, there may be one or three seal rings.

Further, a blocking structure is fixedly arranged on the outer side face of the lower end of the piston assembly 15 and is located below the locking nut 3, so that the locking nut 3 moves downwards at most to abut against the blocking structure on the piston assembly 15. The blocking structure can prevent the lock nut 3 from being screwed out downwards along the thread section 12 to fall off due to vibration in the running process of the whole vehicle.

Optionally, the blocking structure is a shaft retainer ring 2 clamped and fixed on the groove of the piston assembly 15, so that the shaft retainer ring is convenient to replace. Alternatively, as shown in fig. 8, the blocking structure is a pin 14 welded to the piston assembly 15, and the structural strength is high. Still alternatively, the blocking structure is a bolt threadedly coupled to the piston assembly 15, which is less costly.

The mechanical locking supporting leg oil cylinder structure provided by the embodiment has the advantages that the mechanical locking structure is added on the basis of hydraulic locking, the problem that the oil cylinder descends due to internal leakage and external leakage of the supporting leg oil cylinder which is supported for a long time can be solved, the supporting leg of the oil cylinder is kept not to descend, the supporting state of the supporting leg of the whole vehicle is maintained, the structure is simple, and the processability is good.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In the description of the present invention, the terms "plurality", and "plural" mean two or more unless otherwise specified.

The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above the utility model provides a mechanical locking landing leg hydro-cylinder structure has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. A mechanical locking support leg oil cylinder structure is characterized by comprising a cylinder body assembly and a piston assembly (15); the upper end of the piston assembly (15) extends into the cylinder assembly and is connected with the cylinder assembly in a sealing way, and a part of the cylinder assembly above the piston assembly (15) forms a rodless cavity (81); the lower end of the piston assembly (15) extends out of the bottom opening of the cylinder body assembly, a threaded section (12) is arranged on the outer side face of the lower end of the piston assembly (15), a locking nut (3) is connected to the threaded section (12) in a threaded mode, the locking nut (3) can be matched with the threaded section (12) in a threaded mode to move up and down on the threaded section (12), and therefore the locking nut (3) is upwards abutted to the cylinder body assembly.

2. The mechanical locking leg cylinder arrangement of claim 1, characterized in that the cylinder block assembly comprises a cylinder block (8), an annular guide sleeve (7) and an annular gland (4); the upper end of the guide sleeve (7) extends into the cylinder body (8) through the lower port of the cylinder body (8) and is fixed on the inner side surface of the cylinder body (8), and the lower end of the guide sleeve (7) is positioned on the outer side of the cylinder body (8); the gland (4) is positioned on the outer side of the cylinder body (8), and the gland (4) is fixedly butted with the lower end of the guide sleeve (7); the upper end of the piston assembly (15) extends into the cylinder body (8) and is connected with the cylinder body (8) in a sealing way, and the part of the cylinder body (8) above the piston assembly (15) forms the rodless cavity (81); the lower end of the piston assembly (15) extends downwards through the middle through hole of the guide sleeve (7) and the middle through hole of the gland (4); the locking nut (3) is propped against the cylinder body assembly upwards through propping against the gland (4).

3. The mechanical locking support leg oil cylinder structure as claimed in claim 2, wherein the upper end of the gland (4) is sleeved outside the lower end of the guide sleeve (7), a positioning groove (71) is formed in the outer side surface of the lower end of the guide sleeve (7), and a positioning hole (41) is formed in the gland (4) in a penetrating manner; a steel ball (6) and a set screw (5) are arranged in the positioning hole (41), part of the structure of the steel ball (6) is located in the positioning groove (71), the rest part of the structure is located in the positioning hole (41), and the set screw (5) is in threaded connection with an opening of the positioning hole (41) so as to position the steel ball (6) in the positioning hole (41).

4. The mechanical locking leg cylinder structure of claim 2, wherein the gland (4) is integrally formed with the guide sleeve (7).

5. The mechanical locking leg cylinder structure of claim 2, wherein the gland (4) is fixed with the guide sleeve (7) in a threaded connection.

6. The mechanical locking support leg oil cylinder structure as claimed in claim 1, wherein a sealing ring is sleeved on the outer side surface of the upper end of the piston assembly (15), and the piston assembly (15) is connected to the cylinder body assembly in a sealing manner through the sealing ring.

7. The mechanical locking leg cylinder structure as claimed in any one of claims 1 to 6, characterized in that a blocking structure is further fixedly arranged on the outer side surface of the lower end of the piston assembly (15), and the blocking structure is positioned below the locking nut (3), so that on the piston assembly (15), the locking nut (3) moves downward at most to abut against the blocking structure.

8. The mechanical locking leg cylinder structure of claim 7, wherein the blocking structure is a shaft retainer ring (2) snap-fitted into a groove of the piston assembly (15).

9. Mechanical locking leg cylinder arrangement according to claim 7, characterized in that the blocking structure is a pin (14) welded to the piston assembly (15).

10. The mechanical lock leg cylinder arrangement of claim 7, wherein the blocking structure is a bolt threaded to the piston assembly (15).

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