CN217762485U - Pipeline sealing structure and hydraulic steering gear - Google Patents

Abstract

The application discloses pipeline seal structure includes: the elastic sealing main body is sleeved on the outer side of the pipeline; and locate the bolster in the elastic sealing main body, the both ends of bolster butt respectively the inner circle internal surface and the outer lane internal surface of elastic sealing main body, with when the elastic sealing main body receives the pipeline extrusion, the bolster to the elastic sealing main body applys the effort so that the elastic sealing main body and the sealed laminating of pipeline. The utility model provides a pipeline sealing structure, the sealed main part of elasticity is used for sealed pipeline hookup location, and when having liquid to flow in the pipeline, the pipeline receives liquid pressure extrusion to make the sealed main part of elasticity outwards expand, and meanwhile the inboard bolster of the sealed main part of elasticity is together with receiving the compression, and the bolster can apply reaction force in order to stop the sealed main part of elasticity outwards to expand, thereby can make the sealed main part of elasticity and the sealed laminating of pipeline, can prevent the oil impregnate.

Description

Pipeline sealing structure and hydraulic steering gear

Technical Field

The utility model relates to a steering system technical field, concretely relates to pipeline seal structure and hydraulic steering gear.

Background

The hydraulic steering gear is generally provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are connected with an oil pump or an oil tank through a pipeline so as to realize oil inlet and oil return. The oil inlet and outlet and the pipeline connecting position are easy to cause oil leakage after being used for a period of time, and even if the sealing ring is arranged at the oil inlet and outlet and the pipeline connecting position, the sealing failure is easy to occur after the oil inlet and outlet and the pipeline connecting position are used for a period of time, and the sealing effect is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

In order to solve one or more technical problem among the prior art, or provide a profitable selection at least, the utility model provides a pipeline seal structure and hydraulic steering gear has solved business turn over hydraulic fluid port and the sealed poor problem of pipeline connection position.

The utility model discloses a pipeline sealing structure, include: the elastic sealing main body is sleeved on the outer side of the pipeline; and locate the bolster in the sealed main part of elasticity, the both ends of bolster butt respectively the inner circle internal surface and the outer lane internal surface of the sealed main part of elasticity, with when the sealed main part of elasticity receives the pipeline extrusion, the bolster to the sealed main part of elasticity applys the effort so that the sealed main part of elasticity laminates with the pipeline.

The utility model discloses a pipeline seal structure still has following additional technical characterstic:

the buffer is a first spring.

The first spring is a U-shaped spring.

The inner diameter of the elastic sealing main body is 1 mm-3 mm smaller than the outer diameter of the pipeline.

The elastic sealing device is characterized by further comprising an end cover arranged on the outer side of the elastic sealing main body, the end cover extends in the direction departing from the elastic sealing main body to form a guide chamber, and a pipeline is sleeved into the elastic sealing main body through the guide chamber.

Further, the utility model also discloses a hydraulic steering gear, including the steering gear casing, the steering gear casing is equipped with oil inlet, oil-out, still includes the pipeline seal structure of above-mentioned embodiment, the oil inlet with at least one of oil-out is installed pipeline seal structure.

The utility model discloses a hydraulic steering gear still has following additional technical characterstic:

the oil inlet is connected with an oil pump through an oil inlet pipe, the elastic sealing main body is arranged between the oil inlet and the oil inlet, and the inner diameter of the elastic sealing main body is 1 mm-3 mm smaller than the outer diameter of the oil inlet pipe.

An end cover is arranged at the oil inlet, the elastic sealing main body is fixed to the oil inlet through the end cover, and the end cover extends in the direction departing from the elastic sealing main body to form a guide cavity so as to install the oil inlet pipe.

The oil inlet is also provided with a one-way valve which is in one-way conduction along the direction from the oil inlet pipe to the oil inlet.

The check valve comprises an oil inlet end, an oil outlet end and a valve cavity between the oil inlet end and the oil outlet end, wherein a second spring and a ball valve which are in elastic butt joint are arranged in the valve cavity, a first step is arranged between the valve cavity and the oil outlet end, a second step is arranged between the valve cavity and the oil inlet end, one end of the second spring is in butt joint with the first step, and one end of the ball valve is in butt joint with the second step.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

1. the utility model discloses a pipeline sealing structure, including the elastic sealing main part and locating the bolster in the elastic sealing main part, wherein, the elastic sealing main part is used for sealed pipeline hookup location, and when having liquid flow in the pipeline, the pipeline receives the liquid pressure extrusion to make the outward expansion of elastic sealing main part, and meanwhile the inboard bolster of elastic sealing main part together with receive the compression, the bolster can apply reaction force in order to prevent the outward expansion of elastic sealing main part to can make the laminating of elastic sealing main part and pipeline sealing, can prevent the oil impregnate.

2. As a preferred embodiment, the buffer member is a first spring; namely, the buffer piece has the telescopic characteristic, when the elastic sealing main body has the outward expansion trend, the buffer piece can be compressed, and the buffer piece can apply the reaction force to prevent the elastic sealing main body from expanding outwards at the moment, so that the sealing reliability is ensured.

As a next preferred example of the present embodiment, the first spring is a U-shaped spring; by optimizing the shape of the buffer piece, the matching between the buffer piece and the elastic sealing main body can be improved, the sealing matching between the elastic sealing main body and the pipeline is improved, and the failure period of the elastic sealing main body can be prolonged.

3. In a preferred embodiment, the inner diameter of the elastic sealing main body is 1mm to 3mm smaller than the outer diameter of the pipeline; during assembly, the elastic sealing main body can be sleeved on the pipeline, the inner diameter of the elastic sealing main body can be relatively smaller by utilizing the elastic characteristic of the elastic sealing main body, and the fitting effect of the elastic sealing main body and the pipeline can be enhanced on the premise of realizing assembly.

4. As a preferred embodiment, the sealing device further comprises an end cover arranged on the outer side of the elastic sealing main body, the end cover extends along the direction departing from the elastic sealing main body to form a guide chamber, and the pipeline is sleeved into the elastic sealing main body through the guide chamber; through setting up the end cover, on the one hand can fix the pressure equipment of elastic seal main part in relevant position in order to provide fixedly, and on the other hand sets up the direction cavity and can provide the direction for the piping erection, and the pipeline of being convenient for aligns with the elastic seal main part, can improve the installation effectiveness.

5. The utility model discloses a hydraulic steering gear, including above-mentioned pipeline seal structure, when it installs in oil inlet and/or oil-out, can improve the sealed effect of pipeline and oil inlet and/or oil-out, can prevent the oil impregnate.

6. As a preferred embodiment, the oil inlet is connected with the oil pump through an oil inlet pipe, the elastic sealing body is arranged between the oil inlet pipe and the oil inlet, and the inner diameter of the elastic sealing body is 1 mm-3 mm smaller than the outer diameter of the oil inlet pipe; the elastic characteristic of the elastic sealing main body is utilized to enable the inner diameter of the elastic sealing main body to be relatively small, the fitting effect of the elastic sealing main body and the oil inlet pipe can be enhanced on the premise of assembly, the sealing effect can be improved, and leakage in the process that oil flows into the oil inlet from the oil inlet pipe is prevented.

7. As a preferred embodiment, an end cover is arranged at the oil inlet, the end cover fixes the elastic sealing main body at the oil inlet, and the end cover extends along a direction departing from the elastic sealing main body to form a guide cavity for installing an oil inlet pipe; through setting up the end cover, on the one hand can provide fixedly to the elastic seal main part, and on the other hand sets up the direction cavity and can provide the direction for advancing the installation of oil pipe, is convenient for advance oil pipe and aims at with the elastic seal main part, can improve the installation effectiveness.

8. As a preferred embodiment, the oil inlet is further provided with a one-way valve, and the one-way valve is communicated in one way along the direction from the oil inlet pipe to the oil inlet; through setting up the check valve, can restrict the flow direction of oil to guarantee hydraulic steering gear normal steady operation.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic structural view of a hydraulic steering gear according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a pipeline sealing structure according to an embodiment of the present application.

Reference numerals:

10-elastic sealing main body, 11-buffer piece, 111-stop piece, 112-abutting plane, 20-steering gear shell, 21-oil inlet, 22-end cover, 221-guide chamber.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus, the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected by the transition structure, but connected by the connection structure to form a whole. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to fig. 2, the utility model discloses a pipeline sealing structure, include: the elastic sealing device comprises an elastic sealing main body 10, wherein the elastic sealing main body 10 is used for being sleeved on the outer side of a pipeline; and locate bolster 11 in the elastic sealing main body 10, the both ends of bolster 11 butt respectively the inner circle internal surface and the outer lane internal surface of elastic sealing main body 10, with when elastic sealing main body 10 receives the pipeline extrusion, bolster 11 to elastic sealing main body 10 applys the effort so that elastic sealing main body 10 and pipeline seal laminate.

The utility model discloses a pipeline sealing structure can improve the leakproofness of steering gear business turn over hydraulic fluid port and tube coupling position among the prior art through the cooperation of elastic seal main part 10 and bolster 11, of course, the pipeline sealing structure of this application is not limited to being applied to hydraulic steering gear, still can be applied to other pipeline connected system. Compare in the scheme that prior art used the sealing washer, the sealing washer warp inefficacy easily, this application uses bolster 11 and the cooperation of elastic seal main part 10, can strengthen the sealed effect of laminating of elastic seal main part 10 and pipeline pipe wall, can prevent the weeping, prolongs the failure cycle of elastic seal main part 10, prolongs its life.

As shown in fig. 2, the middle of the elastic sealing body 10 is provided with an opening for inserting a pipeline, and the outer wall of the outer ring of the elastic sealing body 10 can be matched with another pipeline or a port to realize the sealing of the pipeline connection. Further, the both ends of bolster 11 butt elastic seal main part 10's inner circle internal surface and outer lane internal surface respectively, when elastic seal main part 10 received inboard pipeline extrusion, can extrude bolster 11 simultaneously, the one end that bolster 11 is close to inboard can exert reaction force to elastic seal main part 10 after being extruded, consequently can prevent elastic seal main part 10 outwards to expand for elastic seal main part 10 can closely laminate with the pipeline, has avoided liquid to leak from the fit clearance of elastic seal main part 10 with the pipeline.

Furthermore, by arranging the buffer piece 11, the elastic sealing main body 10 can be prevented from generating large deformation, so that the time of the elastic sealing main body 10 failing due to deformation can be prolonged, and the service life of the elastic sealing main body is prolonged.

In a preferred embodiment of the present application, the buffer 11 is a first spring. The buffer 11 is a spring, and on one hand, the spring has certain rigidity and can provide support for the elastic sealing main body 10 and prevent the elastic sealing main body 10 from generating large deformation; on the other hand, the spring has elasticity, and can apply a reaction force to the elastic sealing body 10 when compressed, thereby preventing the elastic sealing body 10 from expanding outwards, and improving the reliability of the sealing fit of the elastic sealing body 10 and the pipeline.

Preferably, the first spring is a U-shaped spring.

As shown in fig. 2, an inward protruding stop 111 is disposed at an end of the U-shaped spring close to the inner side to accelerate the attachment of the elastic sealing body 10 to the pipeline when the elastic sealing body 10 is pushed back, so as to prevent the elastic sealing body 10 from deforming greatly, and to ensure that the elastic sealing body 10 and the pipeline are always kept in dynamic sealing fit (dynamic means that the elastic sealing body 10 deforms slightly when the interior of the pipeline is changed by hydraulic pressure). Furthermore, an abutting plane 112 is disposed at an end of the U-shaped spring close to the outer side to increase a contact area with the elastic sealing body 10, so as to ensure that the U-shaped spring does not generate a position deviation when compressed, and improve the reliability of the U-shaped spring matching with the elastic sealing body 10.

In a preferred embodiment of the present invention, the inner diameter of the elastic sealing body 10 is smaller than the outer diameter of the pipe by 1mm to 3mm.

As shown in fig. 2, the inner diameter of the elastic sealing body 10 is R1, and R1 may be designed to be 1mm to 3mm smaller than the outer diameter of the pipeline according to the structure of the pipeline to be applied, so that the elastic sealing body 10 and the pipeline can be tightly attached to each other by the diameter difference between the elastic sealing body 10 and the pipeline and the elastic force provided by the buffer 11, thereby improving the sealing effect. Further, the outer diameter of the elastic sealing main body 10 is R2, and by adjusting the value of R1 and the ratio of R1 to R2 (to adjust the thickness of the elastic sealing main body 10), the elastic sealing main body 10 can be adapted to pipelines of more specifications, so that the application range can be expanded, and the practicability can be improved.

As a preferred embodiment of the present application, the sealing device further includes an end cap disposed outside the elastic sealing main body 10, the end cap extends in a direction away from the elastic sealing main body 10 to form a guiding chamber, and a pipeline is sleeved in the elastic sealing main body 10 through the guiding chamber.

Specifically, the guide chamber communicates with the opening of the elastic sealing body 10 so that the pipe passes through. Through setting up the end cover, can provide the pipeline installation direction, can accelerate the pipeline and aim at with elastic seal main part 10, can improve the installation effectiveness.

On the other hand, the utility model also discloses a hydraulic steering gear, including steering gear casing 20, steering gear casing 20 is equipped with oil inlet 21, oil-out, hydraulic steering gear still includes above-mentioned embodiment's pipeline seal structure, oil inlet 21 with install at least one of oil-out pipeline seal structure.

The utility model discloses a pipeline seal structure can be applied to the sealed of oil inlet 21 and/or oil-out position in the hydraulic steering ware, can improve sealing performance, prevents the oil impregnate.

As a preferred embodiment of the present application, the oil inlet 21 is connected to an oil pump through an oil inlet pipe, the elastic sealing body 10 is disposed between the oil inlet pipe and the oil inlet 21, and the inner diameter of the elastic sealing body 10 is smaller than the outer diameter of the oil inlet pipe by 1mm to 3mm.

When the hydraulic steering gear works, oil can be fed into the oil inlet pipe and the oil inlet 21 through the oil pump, the oil inlet pipe can be extruded when the pressure of an oil body in the oil inlet pipe is increased, the elastic sealing main body 10 is matched with the buffer piece 11 to enable the elastic sealing main body 10 to be tightly attached to the oil inlet pipe, and the sealing effect can be ensured. Further, the diameter difference between the elastic sealing body 10 and the oil inlet pipe can be used to enhance the holding force of the elastic sealing body 10 on the oil inlet pipe, so as to further improve the sealing effect.

Further, an end cover 22 is disposed at the oil inlet 21, the end cover 22 fixes the elastic sealing body 10 to the oil inlet 21, and the end cover 22 extends in a direction away from the elastic sealing body 10 to form a guiding cavity 221 for mounting the oil inlet pipe.

As shown in fig. 1, the diverter housing 20 and the end cover 22 simultaneously fix the elastic sealing body 10 at the position of the oil inlet 21, and the end cover 22 is provided with a guide chamber 221, and the guide chamber 221 communicates with the opening of the elastic sealing body 10 so as to install the oil inlet pipe. Namely, through setting up end cover 22, can fix elastic seal main part 10 on the one hand, on the other hand can provide the direction for advancing the installation of oil pipe, advances oil pipe and aligns fast with elastic seal main part 10 of being convenient for to improve the installation effectiveness.

Further, the oil inlet 21 is further provided with a check valve, and the check valve is in one-way conduction along the direction from the oil inlet pipe to the oil inlet 21.

Through setting up the check valve, can inject the flow direction of oil body to guarantee the normal steady operation of hydraulic steering ware. The structure of the check valve is not limited, and the appropriate type can be selected according to actual requirements.

Preferably, the check valve includes an oil inlet end, an oil outlet end and a valve cavity located between the oil inlet end and the oil outlet end, a second spring and a ball valve with elastic butt joints are arranged in the valve cavity, a first step is arranged between the valve cavity and the oil outlet end, a second step is arranged between the valve cavity and the oil inlet end, one end of the second spring is in butt joint with the first step, and one end of the ball valve is in butt joint with the second step.

Specifically, the oil inlet end of the check valve is communicated with the oil inlet pipe, and the oil outlet end of the check valve is communicated with the oil inlet 21, when oil body flows from the oil inlet pipe to the check valve, the oil pressure overcomes the resistance of the second spring to push the ball valve to move towards the oil outlet end so as to form an overflowing gap between the ball valve and the oil inlet end, so that the oil inlet end, the valve cavity and the oil outlet end are sequentially communicated, and the oil body can flow into the steering gear. On the contrary, when the steering gear stops working, the pressure provided by the oil pump is lower, the oil pressure is smaller than the pressure of the second spring, the second spring can push the ball valve to close the overflowing gap so as to block the communication between the oil inlet end and the oil outlet end, and at the moment, the oil body cannot flow back to the oil inlet pipe from the steering gear. Wherein the second spring is, for example, a threaded spring.

Although the above embodiment only shows the solution of providing the pipeline sealing structure at the oil inlet 21, it can be understood that the present application may also provide the pipeline sealing structure at the position of the oil outlet. For example, the oil outlet is connected with the oil tank through the oil outlet pipe, oil return from the hydraulic steering gear to the oil tank can be realized, and the pipeline sealing structure is arranged between the oil outlet and the oil outlet pipe, so that the sealing effect can be ensured, and outward oil leakage can be prevented. Further, the oil outlet may be provided with a one-way valve to limit the flow of oil bodies only from the hydraulic steering gear to the oil tank.

The structure of the elastic sealing body 10 and the buffer member 11 can be obtained by referring to the description of the above embodiments and examples, and the improved pipe sealing structure is applied to the hydraulic steering gear, which can improve the overall performance of the hydraulic steering gear.

The technical solution protected by the present invention is not limited to the above embodiments, and it should be noted that the technical solution of any one embodiment is combined with the technical solution of one or more other embodiments in the protection scope of the present invention. Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A pipe sealing structure, comprising:

the elastic sealing main body is sleeved on the outer side of the pipeline; and

locate bolster in the elastic sealing main part, the both ends of bolster butt respectively the inner circle internal surface and the outer lane internal surface of elastic sealing main part, with when the elastic sealing main part receives the pipeline extrusion, the bolster to the elastic sealing main part is applyed the effort so that elastic sealing main part and the sealed laminating of pipeline.

2. The piping seal structure according to claim 1,

the buffer is a first spring.

3. The piping seal structure according to claim 2,

the first spring is a U-shaped spring.

4. The piping seal structure according to claim 1,

the inner diameter of the elastic sealing main body is 1 mm-3 mm smaller than the outer diameter of the pipeline.

5. The piping seal structure according to claim 1,

the elastic sealing device is characterized by further comprising an end cover arranged on the outer side of the elastic sealing main body, the end cover extends in the direction departing from the elastic sealing main body to form a guide chamber, and a pipeline is sleeved into the elastic sealing main body through the guide chamber.

6. A hydraulic steering gear comprising a steering gear housing provided with an oil inlet and an oil outlet, characterized by further comprising a pipe seal structure according to claim 1, said pipe seal structure being mounted to at least one of said oil inlet and said oil outlet.

7. The hydraulic diverter according to claim 6,

the oil inlet is connected with an oil pump through an oil inlet pipe, the elastic sealing main body is arranged between the oil inlet and the oil inlet, and the inner diameter of the elastic sealing main body is 1 mm-3 mm smaller than the outer diameter of the oil inlet pipe.

8. The hydraulic diverter according to claim 7,

an end cover is arranged at the oil inlet, the elastic sealing main body is fixed to the oil inlet through the end cover, and the end cover extends in the direction departing from the elastic sealing main body to form a guide cavity so as to install the oil inlet pipe.

9. The hydraulic diverter according to claim 7,

the oil inlet is also provided with a one-way valve which is in one-way conduction along the direction from the oil inlet pipe to the oil inlet.

10. The hydraulic diverter according to claim 9,

the check valve comprises an oil inlet end, an oil outlet end and a valve cavity between the oil inlet end and the oil outlet end, wherein a second spring and a ball valve which are in elastic butt joint are arranged in the valve cavity, a first step is arranged between the valve cavity and the oil outlet end, a second step is arranged between the valve cavity and the oil inlet end, one end of the second spring is in butt joint with the first step, and one end of the ball valve is in butt joint with the second step.

Images