CN210290338U

CN210290338U - Oil cylinder and vehicle with same

Info

Publication number: CN210290338U
Application number: CN201921069902.5U
Authority: CN
Inventors: 杨国涛; 涂书柏
Original assignee: Beiqi Foton Motor Co Ltd
Current assignee: Hebei Leisa Heavy Construction Machinery Co., Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-04-10
Anticipated expiration: 2029-07-09

Abstract

The utility model discloses a hydro-cylinder and vehicle that has it, the hydro-cylinder includes: a piston rod; the piston rod is sleeved with the piston rod, and the front end cover is positioned at the outer end of the gland; the first sealing element is sleeved outside the piston rod and located on the radial inner side of the gland, the first sealing element comprises a plurality of sealing rings which are axially stacked, and at least part of the sealing rings are provided with first lips which face away from the front end cover and are open. Therefore, the first sealing element with the laminated structure is arranged between the gland and the piston rod, and the first sealing element can effectively prevent the oil liquid in the oil cylinder from leaking along with the movement of the piston rod, so that the reliability of the oil cylinder can be improved.

Description

Oil cylinder and vehicle with same

Technical Field

The utility model belongs to the technical field of the vehicle technique and specifically relates to a hydro-cylinder and vehicle that has it are related to.

Background

In the related technology, the working environment of the vehicle oil cylinder is severe, the working frequency of the oil cylinder is high, the speed is high, the sealing is easy to wear, the compensation capability is low, and the sealing performance is poor, so that the service life of the oil cylinder is short.

Disclosure of Invention

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide an oil cylinder with good sealing performance.

The utility model discloses still provide a vehicle.

According to the utility model discloses hydro-cylinder, include: a piston rod; the piston rod is sleeved with the piston rod, and the front end cover is positioned at the outer end of the gland; the first sealing element is sleeved outside the piston rod and located on the radial inner side of the gland, the first sealing element comprises a plurality of sealing rings which are axially stacked, and at least part of the sealing rings are provided with first lips which face away from the front end cover and are open.

According to the utility model discloses hydro-cylinder through the first sealing member that is provided with stacked structure between gland and piston rod, the problem that fluid in the hydro-cylinder leaks along with the motion of piston rod can be prevented effectively to first sealing member moreover from taking place to can promote the reliability of hydro-cylinder.

According to some embodiments of the utility model, at least part the longitudinal section of sealing washer is the V-arrangement, adjacent two keep away from in the sealing washer the outer end of a sealing washer of front end housing stretches into another the sealing washer first lip.

According to some embodiments of the invention, the first sealing member is sandwiched between the front end cover and the gland in the axial direction.

According to some embodiments of the utility model, the gland has the orientation the open seal groove of front end housing, the front end housing has along axial protrusion and stretches into the boss of seal groove, first sealing member clamp is established the diapire of seal groove with between the terminal surface of boss.

According to some embodiments of the utility model, the internal perisporium of boss is equipped with and is used for the cover to establish front end housing guide ring outside the piston rod.

According to the utility model discloses a some embodiments, the hydro-cylinder still includes: the second sealing element is sleeved outside the piston rod and located on the radial inner side of the front end cover, the second sealing element is provided with a second lip opening facing away from the gland, and the second lip opening is provided with an expansion ring.

According to the utility model discloses a some embodiments, the hydro-cylinder still includes: the third sealing element is sleeved outside the piston rod and located on the radial inner side of the front end cover, and the third sealing element is provided with a third lip opening facing away from the gland in an opening mode.

According to the utility model discloses a some embodiments, the hydro-cylinder still includes: a third seal disposed between the front end cap and the piston rod and located axially outward of the second seal, and the cylinder is provided with a trapway, one end of which is disposed between and spaced apart from the second and third seals.

According to some embodiments of the invention, the trapway further comprises: locate the front end housing flow channel of front end housing with locate the gland flow channel of gland, the one end of gland flow channel with the one end intercommunication of front end housing flow channel, the other end of gland flow channel extends to the outer wall of gland.

According to the utility model discloses a some embodiments, the hydro-cylinder still includes: and the sealing gasket is clamped between the front end cover and the gland and surrounds the joint of the front end cover flow channel and the gland flow channel.

According to the utility model discloses vehicle, including foretell hydro-cylinder.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic cross-sectional view of an oil cylinder according to an embodiment of the present invention;

fig. 2 is a partially enlarged view of a portion a in fig. 1.

Reference numerals:

an oil cylinder 100,

A piston rod 10, a gland 20, a front end cover 30, a boss 31,

A first sealing member 40, a sealing ring 41, a first lip 411,

A second seal 50, a second lip 51, an expansion ring 52,

A third seal 60, a third lip 61,

A trapway 70, a front end cap flow channel 71, a gland flow channel 72, a sealing gasket 73,

A front end cap guide ring 80a, a gland guide ring 80 b.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

An oil cylinder 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 2.

According to the utility model discloses hydro-cylinder 100 includes: piston rod 10, gland 20, front end cap 30 and first seal 40.

As shown in fig. 1, the gland 20 and the front end cap 30 are both sleeved outside the piston rod 10, and the front end cap 30 is located at the outer end of the gland 20. The first sealing member 40 is sleeved outside the piston rod 10 and located on the radial inner side of the gland 20, the first sealing member 40 includes a plurality of sealing rings 41 arranged in an axial stacking manner, and at least a part of the sealing rings 41 has a first lip 411 which is opened towards the position away from the front end cover 30.

Specifically, a plurality of stacked seal rings 41 together form the first seal 40, and the plurality of seal rings 41 have a first lip 411 that opens away from the front end cap 30. The front end cap 30 is positioned at the outer end of the gland 20, so that the opening directions of the plurality of packing rings 41 face the inner side of the gland 20. The plurality of sealing rings 41 opening towards the inner side can prevent oil in the oil cylinder 100 from leaking outwards, namely the arrangement direction of the first lip 411 has good blocking capability on the movement of the oil to one side of the front end cover 30, and can effectively prevent the oil in the oil cylinder 100 from moving to the outer side of the gland 20 along with the piston rod 10, so that a good sealing effect can be achieved between the gland 20 and the piston rod 10 through the first sealing element 40.

Referring to fig. 2, specifically, the first sealing member 40 includes a plurality of sealing rings 41, the plurality of sealing rings 41 are sequentially arranged along the extending direction of the piston rod 10, and the structure of the sealing ring 41 disposed at the end of the first sealing member 40 may be adjusted according to the structure of the portion (e.g., the gland 20) to which the sealing ring is attached.

According to the utility model discloses hydro-cylinder 100, through the first sealing member 40 that is provided with laminated structure between gland 20 and piston rod 10, first sealing member 40 can prevent effectively moreover that the fluid in hydro-cylinder 100 from taking place along with the problem of piston rod 10's motion and outer hourglass to can promote hydro-cylinder 100's reliability.

In some embodiments of the present invention, at least a portion of the sealing rings 41 have a V-shaped longitudinal cross section, and the outer end of one sealing ring 41 far away from the front end cover 30 of two adjacent sealing rings 41 extends into the first lip 411 of the other sealing ring 41. It can be understood that the V-shaped structure facilitates the arrangement of the first lip 411 and the stacking arrangement of the plurality of seal rings 41, so that the plurality of seal rings 41 in the stacking arrangement are more compactly engaged, thereby improving the sealing capability of the first sealing member 40.

As shown in fig. 1, in some embodiments of the present invention, a first seal 40 is sandwiched in the axial direction between the front end cap 30 and the gland 20. The front end cover 30 is arranged at the outer end part of the gland 20, and the first sealing element 40 is clamped between the front end cover 30 and the gland 20 support, so that the sealing performance between the gland 20 and the front end cover 30 can be improved. The arrangement mode that the first sealing element 40 is sleeved outside the piston rod 10 and clamped between the front end cover 30 and the gland 20 facilitates the arrangement of the first sealing element 40 in the oil cylinder 100, and the first sealing element 40 is convenient to disassemble and assemble, so that when the first sealing element 40 needs to be replaced, the replacement is more convenient.

In a further embodiment of the invention, as shown in fig. 1, the gland 20 has a sealing groove open towards the front end cap 30, the front end cap 30 has a boss 31 protruding in the axial direction and extending into the sealing groove, and the first sealing member 40 is sandwiched between the bottom wall of the sealing groove and the end face of the boss 31.

It can be understood that the boss 31 can play a good positioning assisting role for the fit between the front end cover 30 and the gland 20, so that the fit reliability between the front end cover 30 and the gland 20 is higher. Due to the high matching reliability of the front end cover 30 and the gland 20, the front end cover 30 can clamp the first sealing element 40 between the front end cover 30 and the gland 20 through the boss 31, so that the first sealing element 40 is well positioned.

As shown in fig. 2, in some embodiments of the present invention, the oil cylinder 100 further includes: and the second sealing element 50 is sleeved outside the piston rod 10, the second sealing element 50 is positioned on the radial inner side of the front end cover 30, the second sealing element 50 is provided with a second lip 51 which is opened to the direction away from the gland 20, and the second lip 51 is provided with an expansion ring 52.

It can be understood that the second sealing element 50 can seal the gap between the piston rod 10 and the front end cover 30, and the second lip 51 is opened in a direction away from the gland 20, so that the second sealing element 50 has a good blocking capability against objects (such as water, dust, etc.) outside the oil cylinder 100, and can effectively prevent water from entering the oil cylinder 100 from the gap between the piston rod 10 and the front end cover 30, thereby improving the sealing performance and reliability of the oil cylinder 100.

Further, an expansion ring 52 is arranged at the second lip 51, and the expansion ring 52 is tightly attached to the front end cover 30 and the piston rod 10, so that the sealing performance between the front end cover 30 and the piston rod 10 at the second sealing element 50 is further improved. It should be noted that the expansion ring 52 has high elasticity, and the high elasticity of the expansion ring 52 can ensure the precompression amount under low pressure or vacuum condition, so that the expansion ring 52 can play a good sealing role for the piston rod 10 with high working frequency and high speed, and effectively prevent the sealing failure.

As shown in fig. 1 and 2, in a further embodiment of the present invention, the oil cylinder 100 further includes: a third sealing element 60, the third sealing element 60 is sleeved outside the piston rod 10 and is positioned at the radial inner side of the front end cover 30, and the third sealing element 60 is provided with a third lip 61 which is opened to the direction away from the gland 20.

It can be understood that the third sealing element 60 can seal the gap between the piston rod 10 and the front end cover 30, and the third lip 61 is opened in a direction away from the gland 20, so that the third sealing element 60 has a good blocking capability for objects (such as water, dust, etc.) outside the oil cylinder 100, and can effectively prevent water from entering the oil cylinder 100 from the gap between the piston rod 10 and the front end cover 30, thereby improving the sealing performance and reliability of the oil cylinder 100.

It should be noted that, when the oil cylinder 100 works, the piston rod 10 makes a piston movement, when the piston rod 10 extends into the oil cylinder 100, water outside the oil cylinder 100 adheres to the piston rod 10 and moves to one side of the cylinder cover, the second sealing element 50 and the third sealing element 60 can play a good role in blocking the water, and the second lip 51 and the third lip 61 can effectively scrape off the residual water on the surface of the piston rod 10, so that the water can be effectively prevented from entering the oil cylinder 100; when the piston rod 10 extends out of the oil cylinder 100, the oil inside the oil cylinder 100 is attached to the piston rod 10 and moves towards one side of the front end cover 30, the first sealing element 40 can have a good blocking effect on the oil, and the first lip 411 can effectively scrape the oil on the surface of the piston rod 10 so that the oil flows back into the oil cylinder 100, so that the oil can be effectively prevented from leaking outside.

Further, by arranging the first sealing element 40, the second sealing element 50, the third sealing element 60 and the like, multi-stage sealing is formed between the front end cover 30 and the cylinder cover, the multi-stage sealing arrangement can effectively improve the sealing reliability of the oil cylinder 100, prevent objects (water, dust and the like) outside the oil cylinder 100 from entering the oil cylinder 100 to pollute oil, and simultaneously effectively prevent the oil in the oil cylinder 100 from leaking outwards.

In some embodiments of the present invention, the oil cylinder 100 further includes: a third seal member 60, the third seal member 60 being disposed between the front end cover 30 and the piston rod 10 and located outside the second seal member 50 in the axial direction, and the cylinder 100 being provided with a trapway 70, one end of the trapway 70 being disposed between the second seal member 50 and the third seal member 60 and spaced apart from the second seal member 50 and the third seal member 60.

Specifically, the second lip 51 may have a good blocking effect on water, dust, etc. attached to the piston rod 10, and the objects, such as water, dust, etc., blocked by the second lip 51 may be discharged from the trapway 70 between the second seal 50 and the third seal 60, so that the objects may be prevented from being accumulated in the front end cap 30.

It will be appreciated that the trapway 70 needs to be spaced from the second and

third seals

50, 60 to prevent the second and

third seals

50, 60 from failing in sealing, and to prevent water retention at the second or

third seals

50, 60.

In a further embodiment of the invention, as shown in fig. 1, the trapway 70 further comprises: a front end cover flow passage 71 provided in the front end cover 30 and a gland flow passage 72 provided in the gland 20, one end of the gland flow passage 72 communicates with one end of the front end cover flow passage 71, and the other end of the gland flow passage 72 extends to the outer wall surface of the gland 20.

It can be understood that water retained in the front end cover 30 needs to be discharged from the front end cover 30, and the water in the front end cover 30 flows through the front end cover flow channel 71 and the gland flow channel 72 in sequence and then is discharged, referring to fig. 1, the sewage discharge channel 70 has a plurality of bending parts, and the arrangement of the bending structure can increase the difficulty of objects outside the oil cylinder 100 entering the oil cylinder 100 through the sewage discharge channel 70, thereby effectively preventing the objects outside the oil cylinder 100 from entering the oil cylinder 100 through the sewage discharge channel 70, and further improving the reliability of the oil cylinder 100.

In some embodiments of the present invention, the oil cylinder 100 further includes: and the sealing gasket 73, wherein the sealing gasket 73 is clamped between the front end cover 30 and the gland 20 and surrounds the joint of the front end cover flow channel 71 and the gland flow channel 72. The sealing performance between the front end cover 30 and the gland 20 can be improved through the sealing washer 73, objects in the sewage channel 70 can be effectively prevented from entering a gap between the front end cover 30 and the gland 20, the sewage effect of the sewage channel 70 can be ensured, and the matching reliability of the front end cover 30 and the gland 20 is improved.

The utility model discloses an in some embodiments, boss 31's internal perisporium is equipped with and is used for the cover to establish front end housing guide ring 80a outside piston rod 10, and front end housing guide ring 80a has good guide effect to the relative front end housing 30's of piston rod 10 motion, can reduce the sliding resistance between piston rod 10 and the front end housing 30 rationally, improves piston rod 10 and front end housing 30 complex reliability.

As shown in fig. 1, in some embodiments of the present invention, the inner peripheral wall of the gland is provided with a plurality of gland guide rings 80b for being sleeved outside the piston rod 10, and the plurality of gland guide rings 80b are arranged at intervals along the axial direction of the piston rod 10. The gland guide ring 80b has a good sliding guide function for the movement of the piston rod 10 with respect to the gland 20.

Alternatively, the gland guide ring 80b may be a phenolic resin material reinforced by cotton fabric, so that the gland guide ring 80b has good wear resistance, and at the same time, the gland guide ring 80b is convenient to assemble to the oil cylinder 100, and metal contact between the gland guide ring 80b and the piston rod 10 is avoided, thereby reducing the loss of parts.

According to the utility model discloses vehicle, vehicle includes foretell hydro-cylinder 100. The oil cylinder 100 can effectively prevent oil in the oil cylinder 100 from leaking outwards, and can prevent external pollutants such as water from entering the oil cylinder 100, so that the reliability of the oil cylinder 100 is high, the oil cylinder can adapt to a severe working environment, the risk of sealing failure is reduced, and the reliability of a vehicle is improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "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 used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An oil cylinder (100) is characterized by comprising

A piston rod (10);

the piston rod assembly comprises a gland (20) and a front end cover (30), wherein the gland (20) and the front end cover (30) are sleeved outside the piston rod (10), and the front end cover (30) is positioned at the outer end of the gland (20);

the first sealing element (40), first sealing element (40) cover is established outside the piston rod (10) and is located the radial inboard of gland (20), first sealing element (40) include along a plurality of sealing rings (41) of axial range upon range of setting, and at least part sealing ring (41) have towards deviating from the first lip (411) that front end housing (30) is open.

2. The cylinder (100) according to claim 1, wherein at least a part of the sealing rings (41) have a V-shaped longitudinal cross section, and the outer end of one sealing ring (41) far away from the front end cover (30) of two adjacent sealing rings (41) extends into the first lip (411) of the other sealing ring (41).

3. The cylinder (100) of claim 1, wherein the first seal (40) is sandwiched in an axial direction between the front end cover (30) and the gland (20).

4. The cylinder (100) according to claim 3, wherein the gland (20) has a seal groove opening toward the front end cover (30), the front end cover (30) has a boss (31) protruding in an axial direction and protruding into the seal groove, and the first seal member (40) is interposed between a bottom wall of the seal groove and an end face of the boss (31).

5. The oil cylinder (100) according to claim 4, characterized in that the inner peripheral wall of the boss (31) is provided with a front end cover guide ring (80a) for being sleeved outside the piston rod (10).

6. The cylinder (100) of any of claims 1-5, further comprising:

the piston rod (10) is sleeved with the second sealing element (50), the second sealing element (50) is located on the outer side of the front end cover (30) in the radial direction, the second sealing element (50) is provided with a second lip (51) facing away from the gland (20) in an opening mode, and the second lip (51) is provided with an expansion ring (52).

7. The cylinder (100) of claim 6, further comprising:

the third sealing element (60) is sleeved outside the piston rod (10) and located on the radial inner side of the front end cover (30), and the third sealing element (60) is provided with a third lip (61) which is opened towards the direction deviating from the gland (20).

8. The cylinder (100) of claim 6, further comprising:

a third seal (60), the third seal (60) being disposed between the front end cover (30) and the piston rod (10) and located outside the second seal (50) in an axial direction, and the cylinder (100) being provided with a trapway (70), one end of the trapway (70) being disposed between the second seal (50) and the third seal (60) and spaced apart from the second seal (50) and the third seal (60).

9. The cylinder (100) of claim 8, wherein the trapway (70) further comprises: locate front end housing flow channel (71) of front end housing (30) and locate gland flow channel (72) of gland (20), the one end of gland flow channel (72) with the one end intercommunication of front end housing flow channel (71), the other end of gland flow channel (72) extends to the outer wall surface of gland (20).

10. A vehicle, characterized by comprising a cylinder (100) according to any one of claims 1-9.