CN212429392U

CN212429392U - Thrust oil cylinder

Info

Publication number: CN212429392U
Application number: CN202020883476.5U
Authority: CN
Inventors: 张新; 吴春雨; 任俊杰; 季雪兵; 靳党鹏; 冯莹莹
Original assignee: Tianhe Mechanical Equipment Manufacturing Co Ltd
Current assignee: Tianhe Mechanical Equipment Manufacturing Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-01-29
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a thrust hydro-cylinder, including cylinder body, hydro-cylinder pole to and the auxiliary rod, the hydro-cylinder pole is followed the length extending direction of cylinder body is located with sliding on the cylinder body, the auxiliary rod is relative the cylinder body sets up fixedly, the hydro-cylinder pole has the cavity pole chamber, the auxiliary rod wears to establish with sliding in the cavity pole chamber, wherein, the auxiliary rod has the body of rod and head, the head with the inner wall sliding fit in cavity pole chamber, the auxiliary rod will the cavity pole chamber is separated for the pole chamber that has and the no pole chamber that does not communicate each other, the back tip of the body of rod is located outside the cylinder body. On the premise of outputting the same thrust as a conventional oil cylinder, the requirement of the oil cylinder on the total displacement of a hydraulic system is greatly reduced, so that the type selection of the pumps is easier, the number of the pumps can be greatly reduced, and the cost is greatly reduced.

Description

Thrust oil cylinder

Technical Field

The utility model relates to a hydro-cylinder for the engineering especially relates to a can be applied to big thrust hydro-cylinder of operating modes such as marine wind power inlays rock drill, shaft drill, shield structure machine erector.

Background

Under the use working conditions of offshore wind power rock-socketed drilling machines, shaft drilling machines, shield tunneling machine erectors and the like, engineering oil cylinders capable of providing large thrust are needed. The thrust force of the engineering oil cylinder is equal to the pressure of the rodless cavity and the sectional area of the rodless cavity, and the tension force is equal to the pressure of the rodless cavity and the sectional area of the rodless cavity.

Under the prior art condition, hydraulic system, the sealed etc. of hydro-cylinder can both bear very high pressure, the pole footpath of hydro-cylinder, the cylinder footpath and overall dimension can be controlled less, but when the hydro-cylinder is longer, not only will guarantee intensity, rigidity when the slender pole atress, need have sufficient depression bar stability simultaneously, depression bar stability is the determinant factor that influences slender pole cross-sectional dimension, consequently in order to guarantee the stability of hydro-cylinder during operation structure, the pole footpath and the cylinder footpath that often need the hydro-cylinder are great, the whole very thick of hydro-cylinder promptly.

The large rod diameter and cylinder diameter of the oil cylinder can cause that the provided pushing force and pulling force are very large, so that the oil pressure is often selected to be reduced, and a very direct problem is caused. To achieve the same advance and retract speeds, the total displacement of the pump needs to be increased. The total displacement of the pump is solved by increasing the number of pumps or selecting a pump with a larger displacement, which results in a great increase in cost.

Disclosure of Invention

The utility model aims at overcoming prior art's defect, providing a novel thrust cylinder.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a thrust cylinder, includes cylinder body, hydro-cylinder pole to and the auxiliary rod, the hydro-cylinder pole is followed the length extending direction of cylinder body is located with sliding on the cylinder body, the auxiliary rod is relative the cylinder body sets up fixedly, the hydro-cylinder pole has cavity rod chamber, the auxiliary rod wears to establish with sliding in the cavity rod chamber, wherein, the auxiliary rod has the body of rod, with be located the head of body of rod front end, the diameter of head is greater than the diameter of the body of rod, the head is located cavity rod intracavity and with the inner wall sliding fit in cavity rod chamber, the auxiliary rod will cavity rod chamber is separated for the pole chamber and no pole chamber that do not communicate each other, the rear end of the body of rod is located outside the cylinder body, just seted up on the body of rod with the first oil passageway that has pole chamber to communicate, and with the second oil passageway that no pole chamber communicates.

Preferably, the outer peripheral portion of the head portion is in dynamic sealing engagement with the hollow stem cavity by a seal.

Preferably, the cylinder rod includes a hollow rod barrel, a front end cover fixedly disposed at a front end of the rod barrel, and a rear end cover fixedly disposed at a rear end of the rod barrel, the rear end cover is provided with a through hole penetrating along an axial direction, and a rod body of the auxiliary rod is inserted into the through hole and is in dynamic sealing fit with the through hole.

Preferably, the rear end of the cylinder body is provided with a mounting hole for mounting the auxiliary rod, and the rear end of the rod body penetrates out of the mounting hole backwards.

Preferably, the first oil passage has a first passage port at the rear of the rod body, the second oil passage has a second passage port at the rear of the rod body, and in the working process of the oil cylinder, one of the first passage port and the second passage port forms an oil inlet, and the other forms an oil outlet.

Further, the first passage port and the second passage port are both located outside the cylinder body.

Furthermore, the first passage opening and the second passage opening are respectively arranged on two opposite side parts in the radial direction of the rod body on the rod body.

Preferably, a cavity is formed between the rear end of the cylinder rod and the cylinder body, and the cavity is communicated with the outside.

Preferably, the axes of the cylinder block, the cylinder rod and the auxiliary rod extend in a common line.

Preferably, the front end of the cylinder rod constitutes a thrust output.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a thrust hydro-cylinder, under the prerequisite of output and the equal thrust of conventional hydro-cylinder, its requirement to hydraulic system total discharge capacity reduces by a wide margin for the type selection of pump is easier, and the quantity of pump also can reduce by a wide margin, thereby can reduce the occupation space of pump, and simultaneously, hydraulic tank's total capacity demand reduces, and each hydraulic component's specification all can be littleer, and the speed of the timely response of hydraulic system is faster. This is particularly evident when large cylinders are used.

Drawings

FIG. 1 is a schematic diagram of an internal structure of an oil cylinder in the prior art;

FIG. 2 and FIG. 3 are schematic diagrams of the working principle of the oil cylinder shown in FIG. 1;

FIG. 4 is a schematic view of the internal structure of the oil cylinder of the present invention;

FIG. 5 and FIG. 6 are schematic diagrams of the working principle of the oil cylinder shown in FIG. 4;

wherein: 10. a cylinder body; 101. a rod cavity; 102. a rodless cavity; 20. a piston rod assembly; 201. a piston rod body; 202. the end of the piston rod;

1. a cylinder body; 11. a cavity; 2. a cylinder rod; 21. a barrel; 22. a front end cover; 23. a rear end cap; 24. a rodless cavity; 25. a rod cavity; 3. an auxiliary lever; 31. a rod body; 32. a head portion; 33. a first oil passage; 34. the second has a channel; 35. a first passage port; 36. a second opening.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

Referring to fig. 4 to 6, the novel thrust cylinder includes a cylinder body 1, a cylinder rod 2 and an auxiliary rod 3, the cylinder rod 2 is slidably disposed on the cylinder body 1 along a length extending direction of the cylinder body 1, the auxiliary rod 3 is fixedly disposed relative to the cylinder body 1, the cylinder rod 2 has a hollow rod cavity, the auxiliary rod 3 is slidably disposed in the hollow rod cavity, the auxiliary rod 3 has a rod body 31 and a head 32 located at a front end of the rod body 31, a diameter of the head 32 is larger than a diameter of the rod body 31, and the head 32 is located in the hollow rod cavity and is in sliding fit with an inner wall of the hollow rod cavity. The auxiliary rod 3 divides the hollow rod cavity into a rod cavity 25 and a rodless cavity 24 which are not communicated with each other, the rear end part of the rod body 31 is positioned outside the cylinder body 1, and the rod body 31 is provided with a first oil channel 33 communicated with the rod cavity 25 and a second oil channel 34 communicated with the rodless cavity 24.

Specifically, referring to fig. 4 to 6, the axes of the cylinder body 1, the cylinder rod 2 and the auxiliary rod 3 extend in a collinear manner, the cylinder rod 2 and the cylinder body 1 are slidably engaged without being hermetically connected, a cavity 11 is formed between the rear end of the cylinder rod 2 and the cylinder body 1, and the cavity 11 is communicated with the outside.

The cylinder rod 2 includes a hollow rod barrel 21, a front end cover 22 fixed to the front end of the rod barrel 21, and a rear end cover 23 fixed to the rear end of the rod barrel 21, the rear end cover 23 is provided with a through hole (not shown) penetrating along the axial direction, and the rod body 31 of the auxiliary rod 3 is inserted into the through hole in a relatively sliding manner and is in dynamic sealing fit with the through hole through a sealing member. In the auxiliary rod 3, an outer peripheral portion of the head portion 32 is fitted to a circumferential inner wall of the hollow rod chamber of the cylinder rod 2 in a dynamic seal manner via a seal member.

The rear end portion of the cylinder body 1 has a mounting hole (not shown) for mounting the auxiliary rod 3, and the rear end portion of the rod body 31 is extended rearward out of the mounting hole. The first oil passage has a first passage port 35 at the rear of the rod body 33, the second oil passage 34 has a second passage port 36 at the rear of the rod body 31, the first passage port 35 and the second passage port 36 are both located outside the cylinder body 1, and the first passage port 35 and the second passage port 36 are respectively arranged on two opposite sides of the rod body 31 in the radial direction on the rod body 31. In the working process of the thrust cylinder, one of the first passage port 35 and the second passage port 36 constitutes an oil inlet, and the other one constitutes an oil outlet. That is, when the rod chamber 25 is filled with oil, the rodless chamber 24 discharges oil outwards; when the rodless cavity 24 is filled with oil, the rod cavity 25 discharges oil outwards, so that the oil cylinder rod 2 slides forwards and backwards relative to the cylinder body 1, the front end part of the oil cylinder rod 2 forms a thrust output end, and pulling force or pushing force is output outwards when the oil cylinder rod 2 slides forwards and backwards.

Referring to fig. 1 to 3, a conventional cylinder in the prior art is shown, which includes a cylinder body 10 and a piston rod assembly 20, wherein the piston rod assembly 20 includes a piston rod body 201 and a piston rod end 202, and the piston rod end 202 is slidably engaged with an inner cavity of the cylinder body 10 and divides the inner cavity into a rod cavity 101 and a rod-less cavity 102. When the conventional oil cylinder works, oil is fed from the port a, the rod cavity 101 is filled with oil, oil is discharged from the port b, oil is discharged from the rodless cavity 102, and the piston rod assembly 20 retracts backwards. Conversely, the piston rod assembly 20 is extended.

Without regard to the back pressure of the cylinder, for the conventional cylinder,

when hydraulic oil enters the oil cylinder from the port a, as shown in fig. 2, the oil cylinder generates a force F₁Comprises the following steps:

the F₁In an inward direction, i.e. a pulling force is output, wherein p₁For this purpose, the hydraulic system pressure.

When the hydraulic oil enters the oil cylinder from the port b, as shown in fig. 3, the oil cylinder generates a force F₂Comprises the following steps:

the F₂Is directed outwards, i.e. the output thrust, where p₂For this purpose, the hydraulic system pressure.

For the novel thrust oil cylinder, under the condition of not considering the back pressure of the oil cylinder,

when hydraulic oil enters the cylinder from the port c (i.e., the first passage port 35), as shown in fig. 5, the cylinder generates a force F₃Comprises the following steps:

the F₃Is directed inwards, a pulling force is output, wherein p₃For this purpose, the hydraulic system pressure.

When hydraulic oil enters the cylinder from the d port (i.e., the second passage port 36), as shown in fig. 6, the cylinder generates a force F₄Comprises the following steps:

the F₄Is directed outward, outputting thrust, where p₄For this purpose, the hydraulic system pressure.

Thrust output by conventional oil cylinder

And thrust of novel thrust hydro-cylinder output in this application

Now if ensure F₂＝F₄When d is₂＝2d₄In time, only the pressure p of the oil cylinder is required₄＝4p₂And (4) finishing. At the moment, the oil cylinder extends the total oil supply quantity required by the unit length, and the novel oil cylinder is only 1/4 of the conventional oil cylinder, so that the requirement on the total discharge capacity of a hydraulic system can be greatly reduced.

And after the requirement of the total discharge capacity of the hydraulic system is reduced, the type selection of the pumps is easier, the number of the pumps can be greatly reduced, so that the occupied space of the pumps is reduced, the cost is reduced, meanwhile, the total capacity requirement of the hydraulic oil tank is reduced, the specification of each hydraulic component can be smaller, and the timely response speed of the hydraulic system is higher. This is particularly evident when large cylinders are used.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A thrust hydro-cylinder, its characterized in that: including cylinder body, hydro-cylinder pole to and the auxiliary rod, the hydro-cylinder pole is followed the length extending direction of cylinder body is located with sliding on the cylinder body, the auxiliary rod is relative the cylinder body sets up fixedly, the hydro-cylinder pole has cavity pole chamber, the auxiliary rod wears to establish with sliding in the cavity pole chamber, wherein, the auxiliary rod has the body of rod, with be located the head of body of rod front end, the diameter of head is greater than the diameter of the body of rod, the head is located cavity pole intracavity and with the inner wall sliding fit in cavity pole chamber, the auxiliary rod will cavity pole chamber is separated for the pole chamber and no pole chamber that do not communicate each other, the rear end portion of the body of rod is located outside the cylinder body, just seted up on the body of rod with the first oil passageway that has pole chamber to communicate, and with the second oil passageway that no pole chamber communicates.

2. The thrust cylinder of claim 1, wherein: the outer peripheral portion of the head portion is in dynamic sealing engagement with the hollow rod cavity through a seal.

3. The thrust cylinder of claim 1, wherein: the oil cylinder rod comprises a hollow rod barrel, a front end cover fixedly arranged at the front end part of the rod barrel and a rear end cover fixedly arranged at the rear end part of the rod barrel, wherein a through hole penetrating along the axial direction is formed in the rear end cover, and a rod body of the auxiliary rod is arranged in the through hole in a penetrating mode and is matched with the through hole in a dynamic sealing mode.

4. The thrust cylinder of claim 1, wherein: the rear end of the cylinder body is provided with a mounting hole for mounting the auxiliary rod, and the rear end of the rod body penetrates out of the mounting hole backwards.

5. The thrust cylinder of claim 1, wherein: the first oil channel is provided with a first channel port at the rear part of the rod body, the second oil channel is provided with a second channel port at the rear part of the rod body, and in the working process of the oil cylinder, one of the first channel port and the second channel port forms an oil inlet, and the other one forms an oil outlet.

6. The thrust cylinder of claim 5, wherein: the first channel opening and the second channel opening are both positioned outside the cylinder body.

7. The thrust cylinder of claim 6, wherein: the first channel opening and the second channel opening are respectively arranged on two opposite side parts in the radial direction of the rod body on the rod body.

8. The thrust cylinder of claim 1, wherein: a containing cavity is formed between the rear end part of the oil cylinder rod and the cylinder body, and the containing cavity is communicated with the outside.

9. The thrust cylinder of claim 1, wherein: the axial leads of the cylinder body, the oil cylinder rod and the auxiliary rod extend in a collinear manner.

10. The thrust cylinder according to any one of claims 1 to 9, characterized in that: the front end of the oil cylinder rod forms a thrust output end.