CN220378609U - Compact hydraulic cylinder and engineering machinery - Google Patents

Abstract

The utility model discloses a compact hydraulic cylinder and engineering machinery, wherein the compact hydraulic cylinder comprises a cylinder barrel, a piston rod of which the right end is connected with a piston, and the left end of the piston rod extends out of the cylinder barrel. An oil port A and an oil port B are arranged on the cylinder barrel on the rodless cavity side, the oil port B is communicated with the rodless cavity, an oil way is arranged in the cylinder body wall of the cylinder barrel, and the oil port A is communicated with the rod cavity through the oil way. This application is through setting up the oil circuit in the cylinder body wall of cylinder, and hydraulic oil passes inside oil circuit, gets into there is the pole chamber, so there are two hydraulic fluid ports in two chambeies of pole chamber, no pole chamber to set up in the same side of pneumatic cylinder, compares in the cylinder both sides with current two hydraulic fluid ports setting, and the space is compacter, satisfies the assembly demand under the special condition.

Description

Compact hydraulic cylinder and engineering machinery

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to a compact hydraulic cylinder and engineering machinery.

Background

The hydraulic cylinder is a hydraulic actuator that 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 hydraulic cylinder with the conventional structure is generally provided with two oil ports which are respectively close to two sides of a rod cavity and two sides of a rodless cavity, the hydraulic system is connected with the two oil ports, and a piston rod can extend back and forth along the axis of the piston rod to retract under the movement of hydraulic oil, so that the appointed action of the hydraulic cylinder is completed. Because the hydraulic fluid ports are respectively arranged at two sides, enough space is reserved at two sides for connecting the hydraulic system pipelines, and the hydraulic cylinder with the structure can not meet the assembly requirement generally under the condition of compact space at one side.

Disclosure of Invention

The utility model aims to provide a compact hydraulic cylinder and engineering machinery, which are used for solving the problem that in the prior art, assembly is difficult in a compact space due to the fact that oil ports are designed on two sides.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

in a first aspect, the application discloses a compact hydraulic cylinder, comprising a cylinder barrel, a piston rod with one end connected with a piston, and the other end of the piston rod extending out of the cylinder barrel;

the cylinder barrel on the rodless cavity side is provided with an oil port A and an oil port B, the oil port B is communicated with the rodless cavity, an oil way is arranged in the cylinder body wall of the cylinder barrel, and the oil port A is communicated with the rod cavity through the oil way.

Further, the oil passage is arranged in an axial direction of the cylinder tube.

Further, one end in the cylinder barrel is also connected with a guide sleeve, and the piston rod is in sliding connection with the guide sleeve.

Further, the cylinder barrel is characterized by further comprising a protective cover with an annular section, one end of the protective cover is connected with the end part of the piston rod through a screw member, and the other end of the protective cover is connected with the periphery of the cylinder barrel in a sliding mode.

Further, the protection cover comprises two semi-annular cover bodies, and the two cover bodies are detachably connected through a locking piece.

Further, the locking piece comprises a screw, a gasket and a nut, wherein the gasket is sleeved on the screw and penetrates through the through holes of the two cover bodies to be fixed through the nut.

Further, the periphery of cylinder is equipped with the extension board, the inner wall of protection casing is equipped with the cell body along protection casing axis direction, extension board sliding connection is in the cell body.

In a second aspect, the present application discloses a working machine comprising a compact hydraulic cylinder according to any one of the first aspects.

According to the technical scheme, the utility model has the beneficial effects that:

this application is through setting up the oil circuit in the cylinder body wall of cylinder, and hydraulic oil passes inside oil circuit, gets into there is the pole chamber, so there are two hydraulic fluid ports in two chambeies of pole chamber, no pole chamber to set up in the same side of pneumatic cylinder, compares in the cylinder both sides with current two hydraulic fluid ports setting, and the space is compacter, satisfies the assembly demand under the special condition.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a schematic structural view of a protective cover in the utility model.

Wherein: 1-screw, 2-washer, 3-screw, 4-uide bushing, 5-extension board, 6-protection casing, 7-piston rod, 8-cylinder, 9-piston, 10-hydraulic fluid port B, 11-hydraulic fluid port A, 12-oil circuit.

Description of the embodiments

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

It should be noted that, in the description of the present utility model, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and do not require that the present utility model must be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. The terms "front", "back", "left", "right", "upper", "lower" as used in the description of the present utility model refer to directions in the drawings, and the terms "inner", "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

This application is through setting up the oil circuit in the cylinder inner wall, and hydraulic oil passes inside oil circuit, gets into there is the pole chamber. Therefore, two oil ports of two cavities with and without rod cavities are arranged on the same side of the hydraulic cylinder, and compared with the existing two oil ports arranged on two sides of the cylinder barrel, the space is more compact. The present application further provides for a shield. The steel dust cover is arranged on the outer side of the cylinder barrel, and can move along with the movement of the hydraulic cylinder to protect the piston rod and the outer circle of the cylinder barrel and prevent sand and stone from splashing to cause the damage of the cylinder barrel.

Interpretation of related terms involved in the present application

And (3) a hydraulic cylinder: and the hydraulic actuating element converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion.

A cylinder barrel: the key parts of the hydraulic cylinder mainly play a role in pressure resistance in the hydraulic cylinder.

A piston rod: the key parts of the hydraulic cylinder are mainly connected with the piston, and the piston is driven to move by transmitting force acting on the piston.

And (3) a piston: the key parts of the hydraulic cylinder are mainly under the action of internal pressure in the hydraulic cylinder.

Guide sleeve: the key parts of the hydraulic cylinder play a role in supporting and ensuring the coaxiality of the piston rod and the cylinder barrel in the hydraulic cylinder.

Protective cover: and the hydraulic cylinder accessory is arranged on the outer side and used for protecting the outer side surfaces of the cylinder barrel and the piston rod.

Examples

As shown in fig. 1 to 3, the present application will be specifically described below: the application discloses compact pneumatic cylinder, including cylinder 8, the right-hand member even has piston 9's piston rod 7, and outside cylinder 8 was stretched out to piston rod 7's left end, in order to guarantee that piston rod 7 is gliding stable, cylinder 8 in the left end still be connected with uide bushing 4, piston rod 7 and uide bushing 4 sliding connection. An oil port A11 and an oil port B10 are arranged on the cylinder barrel 8 on the rodless cavity side, the oil port B10 is communicated with the rodless cavity, an oil way 12 is arranged in the cylinder body wall of the cylinder barrel 8, and the oil port A11 is communicated with the rod cavity through the oil way 12.

This application is through setting up the oil circuit in the cylinder body wall of cylinder, and hydraulic oil passes inside oil circuit, gets into there is the pole chamber, so there are two hydraulic fluid ports in two chambeies of pole chamber, no pole chamber to set up in the same side of pneumatic cylinder, compares in the cylinder both sides with current two hydraulic fluid ports setting, and the space is compacter, satisfies the assembly demand under the special condition.

In one embodiment of the present application, the oil passages 12 are arranged along the axial direction of the cylinder tube 8, that is, the oil passages adopt a design form of a straight line oil passage, so that on one hand, the length of the oil passages can be reduced, and on the other hand, the manufacture of the oil passages is facilitated.

Use the pneumatic cylinder under comparatively abominable operating mode, can select the protection casing of installing PVC or silicon canvas material in the pneumatic cylinder outside generally, it can be along with the flexible of piston rod, and protection piston rod excircle prevents that external dust, impurity from can not sticking on the excircle surface, avoids entering the pneumatic cylinder inside along with the piston rod is flexible, pollutes hydraulic system, also can prevent that sand and stone in the work progress from splashing to the piston rod excircle, avoids colliding with, the fish tail, reduces the risk of easily producing the oil leak in the piston rod reciprocating motion. But this form protection casing can only protect piston rod excircle surface because of installation form, size etc. are restricted, can't protect cylinder excircle surface, under more abominable operating mode, the sand and stone can pound to the cylinder excircle surface, causes cylinder local point permanent inefficacy, directly influences the normal function of pneumatic cylinder, simultaneously because of conventional protection casing material is also softer, the sand and stone splashes to the piston rod excircle also has the risk of damage surface.

To the above-mentioned problem, the present application has also devised a protection casing 6 of annular cross section, through the design of protection casing in order to protect piston rod 7 and cylinder 8. Specifically, the left end of the protection cover 6 is connected with the extending end of the piston rod 7 through a screw member, and the right end is slidably connected to the outer periphery of the cylinder 8. Further, 3-6 screw holes are uniformly distributed on the piston rod 7, and the screw member penetrates through the through hole on the protective cover 6 to be connected with the screw hole so as to fix the protective cover on the screw hole.

In one embodiment, to facilitate the mounting of the protection cap 6 to the outer periphery of the cylinder tube 8 and the piston rod 7, the protection cap 6 is of a split design, i.e. the protection cap 6 comprises two semi-annular cap bodies, which are detachably connected by means of a locking member. Further, the locking piece comprises a screw 1, a washer 2 and a nut 3, wherein the washer 2 is sleeved on the screw 1 and penetrates through holes of the two cover bodies to be fixed through the nut 3.

In order to ensure that the sliding stability and the direction of the protective cover 6 on the cylinder barrel 8 are not deviated, the periphery of the cylinder barrel 8 is also connected with a support plate 5, the inner wall of the protective cover 6 is provided with a groove body along the axial direction of the protective cover 6, and the support plate 5 is connected in the groove body in a sliding way. During operation, the piston rod 7 drives the protective cover 6 to move, and the support plate 5 can effectively conduct guiding during movement.

A steel protection cover 6 is arranged on the outer side of the cylinder barrel, and when the piston rod 7 extends out, the protection cover 6 extends out leftwards along with the piston rod 7 so as to protect the piston rod. When the piston rod 7 is retracted, the protective cover 6 is sleeved on the cylinder 8, so that the cylinder 8 is protected. The dust cover can move along with the movement of the hydraulic cylinder, the piston rod and the excircle of the cylinder barrel are protected, and the damage of the cylinder barrel caused by sand and stone splashing is prevented.

Examples

Based on the compact hydraulic cylinder provided in embodiment 1, this embodiment also provides an engineering machine using the hydraulic cylinder.

It will be appreciated by those skilled in the art that the present utility model can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the utility model or equivalents thereto are intended to be embraced therein.

Claims (8)

1. The utility model provides a compact pneumatic cylinder, includes cylinder (8), and one end even has piston (9) piston rod (7), the other end of piston rod (7) stretch out in outside cylinder (8), its characterized in that:

the cylinder barrel (8) positioned on the rodless cavity side is provided with an oil port A (11) and an oil port B (10), the oil port B (10) is communicated with the rodless cavity, an oil way (12) is arranged in the cylinder body wall of the cylinder barrel (8), and the oil port A (11) is communicated with the rod cavity through the oil way (12).

2. Compact hydraulic cylinder according to claim 1, characterized in that the oil circuit (12) is arranged in the axial direction of the cylinder tube (8).

3. Compact hydraulic cylinder according to claim 1, characterized in that one end in the cylinder barrel (8) is also connected with a guiding sleeve (4), the piston rod (7) being in sliding connection with the guiding sleeve (4).

4. A compact hydraulic cylinder as claimed in claim 1, characterized by a protective cover (6) of annular cross section, one end of the protective cover (6) being connected to the end of the piston rod (7) by means of a screw member, the other end being slidingly connected to the outer periphery of the cylinder tube (8).

5. Compact hydraulic cylinder according to claim 4, characterized in that the protective cover (6) comprises two semi-annular cover bodies, which are detachably connected by means of a locking element.

6. The compact hydraulic cylinder according to claim 5, wherein the locking member comprises a screw (1), a washer (2) and a nut (3), and the washer (2) is sleeved on the screw (1) and is fixed by the nut (3) after penetrating through the through holes of the two cover bodies.

7. The compact hydraulic cylinder as claimed in claim 4, wherein a support plate (5) is provided on the outer periphery of the cylinder tube (8), a groove body along the axial direction of the protective cover (6) is provided on the inner wall of the protective cover (6), and the support plate (5) is slidably connected in the groove body.

8. A construction machine comprising a compact hydraulic cylinder according to any one of claims 1-7.