阅读说明：本技术 一种支重轮及工程机械 (Thrust wheel and engineering machinery ) 是由 白贺 钟佩文 马先锋 于 2021-09-23 设计创作，主要内容包括：本发明提供一种支重轮及工程机械,支重轮包括轮轴、支重轮体、端盖和浮动密封组件。支重轮两个浮封环本体相向的一面为第一密封面,两个延长部相向的一面为接触面,两个接触面为第二密封面,两个接触面由轮轴轴向向外倾斜,浮动密封组件正常密封状态下,两个第一密封面紧密接触并相对滑动形成密封亮带；在恶劣工况下,支重轮受到偏载力而发生径向和轴向窜动时,两个第二密封面能够相互紧密接触形成有效的密封亮带,保证浮封环的密封效果,防止漏油；同时,延长部的设置增长了外界灰尘、泥沙等杂质进入轮体内部的进入路径,杂质相对现有浮封环结构更难进入轮体内,防止杂质破坏油膜,进一步防止支重轮漏油。(The invention provides a thrust wheel and an engineering machine. The two opposite surfaces of the two floating seal ring bodies of the thrust wheel are first sealing surfaces, the opposite surfaces of the two extending parts are contact surfaces, the two contact surfaces are second sealing surfaces, the two contact surfaces are axially and outwards inclined from the wheel shaft, and the two first sealing surfaces are in close contact and relatively slide to form a sealing bright band under the normal sealing state of the floating seal assembly; under severe working conditions, when the thrust wheel is subjected to an offset load force and moves radially and axially, the two second sealing surfaces can be in close contact with each other to form an effective sealing bright band, the sealing effect of the floating seal ring is ensured, and oil leakage is prevented; simultaneously, the setting of extension has increased the inside entering route of impurity entering wheel body such as external dust, silt, and impurity is more difficult for current floating seal ring structure to get into in the wheel body, prevents that impurity from destroying the oil film, further prevents the thrust wheel oil leak.)

1. A thrust wheel is characterized by comprising

A wheel axle (1);

the thrust wheel body is sleeved outside the wheel shaft (1);

the end cover (3) is arranged at the end part of the wheel shaft (1) and encloses a floating seal chamber with the thrust wheel body, and a gap is formed between the end cover (3) and the thrust wheel body;

the floating seal assembly is arranged in the floating seal chamber and comprises two floating seal rings and two floating seal rubber rings which are sequentially arranged along the axial direction of the wheel shaft (1);

wherein the floating seal ring comprises a floating seal ring body (411) and an extension (412) extending outwards from the floating seal ring body (411), the extension (412) extending outwards deviating from the radial direction of the wheel axle (1).

2. The bogie wheel according to claim 1, wherein the extensions (412) of the two floating seal rings extend in the same direction.

3. The bogie wheel according to claim 2, wherein the extension part (412) comprises a radially extending section (4121) provided at an end of the floating seal ring body (411) and a bent section (4122) provided at an end of the radially extending section (4121) and bent toward one side of the radially extending section (4121).

4. The bogie wheel according to claim 3, wherein the bending segment (4122) is curved or bent.

5. The bogie wheel according to claim 4, wherein the opposite surfaces of the two bending segments (4122) are bending surfaces formed by a plurality of planes connected in series.

6. The bogie wheel according to any of claims 3-5 wherein the outer end face of the bogie wheel body is provided with a first recess (26), the first recess (26) cooperating with the bend section (4122) located on the inner side, the inner end face of the end cap (3) being provided with a second recess (31), the second recess (31) cooperating with the bend section (4122) located on the outer side.

7. The bogie wheel according to any of claims 1 to 5, wherein the bogie wheel body comprises a first bogie body (21) and a second bogie body (22), opposite ends of the first bogie body (21) and the second bogie body (22) being detachably connected together.

8. The bogie wheel according to claim 7, wherein the opposite ends of the first bogie body (21) and the second bogie body (22) are detachably connected together by a screw structure (23).

9. The thrust roller according to any one of claims 1 to 5, wherein a lubricating cavity (24) is formed in the middle of the thrust roller body, an oil passing hole (25) is formed in the thrust roller body, two ends of the oil passing hole (25) are communicated with the floating seal chamber and the lubricating cavity (24), and the oil passing hole (25) is configured to accommodate a magnetic polymer filtering and adsorbing material (4); one side of the oil passing hole (25) positioned in the lubricating cavity (24) is provided with a tightening opening (251), and one side of the oil passing hole (25) positioned in the floating seal chamber is provided with an oil hole plug (252).

10. A working machine, characterized by comprising a bogie wheel according to any of claims 1-9.

Technical Field

The invention relates to the technical field of engineering machinery sealing, in particular to a thrust wheel and engineering machinery.

Background

The thrust wheel is used as a key component of a walking mechanism, namely four wheels with one belt, and is widely applied to the crawler excavator. The reliability of the thrust wheel often directly influences the walking performance of the excavator, and further influences the operation efficiency of the whole excavator. The current front thrust wheel adopts the floating oil blanket to form mechanical seal structure mostly, and this floating oil blanket floats the seal ring and is the shape of a saddle, and two float the surface that seals the ring looks closely to cooperate and relative slip realize sealed, guarantee thrust wheel normal operating to prevent that impurity such as external dust, silt from getting into the internal portion of thrust wheel through floating the seal ring, prevent that the internal lubricating oil of thrust wheel from leaking.

The opposite surfaces of the two floating seal rings are sealing surfaces, and only one contact surface which can contact the seal is arranged on the floating seal ring during operation. The operating environment of the excavator is very severe, the thrust wheel needs to work under the complicated working conditions of being full of muddy water and dust, and the floating seal rings often generate certain axial and radial play under the action of unbalance loading force in the using process, so that the opposite surfaces of the two floating seal rings are separated from each other, and further the sealing failure and oil leakage are caused; in addition, a gap is required to be reserved between the wheel body of the thrust wheel and the end cover during assembly, impurities such as mud and sand easily enter the wheel body through the gap, a floating seal oil film is damaged, and oil leakage of the thrust wheel is caused.

Disclosure of Invention

Therefore, the technical problems to be solved by the invention are to overcome the defects that the floating oil seal structure of the thrust wheel in the prior art is easy to seal and lose efficacy to cause oil leakage when working under a severe working condition, and impurities are easy to enter the wheel body through a gap between the wheel body and the end cover of the thrust wheel to damage a floating oil film to cause oil leakage of the thrust wheel.

Therefore, the invention provides a thrust wheel, which comprises a wheel shaft, a thrust wheel body, an end cover and a floating sealing assembly, wherein the thrust wheel body is sleeved outside the wheel shaft; the end cover is arranged at the end part of the wheel shaft and forms a floating seal chamber with the thrust wheel body, and a gap is formed between the end cover and the thrust wheel body; the floating seal assembly is arranged in the floating seal chamber and comprises two floating seal rings and two floating seal rubber rings which are sequentially arranged along the axial direction of the wheel shaft; the floating seal ring comprises a floating seal ring body and an extension part extending outwards from the floating seal ring body, and the extension part extends outwards in a direction deviating from the radial direction of the wheel shaft.

Optionally, the extension directions of the extensions of the two floating seal rings are the same.

Optionally, the above-mentioned track roller, the extension portion comprises a radial extension segment and a bending segment connected with each other.

Optionally, in the above thrust wheel, the bending section is bent or bent.

Optionally, in the above supporting wheel, the opposite surfaces of the two bending segments are bending surfaces formed by a plurality of planes connected in sequence.

Optionally, in the above thrust wheel, an outer end surface of the thrust wheel body is provided with a first concave portion, and the first concave portion is matched with the bending section located on the inner side; and a second concave part is arranged on the inner end surface of the end cover and is matched with the bending section positioned on the outer side.

Optionally, the thrust wheel body comprises a first thrust wheel body and a second thrust wheel body, and opposite end portions of the first thrust wheel body and the second thrust wheel body are detachably connected together.

Alternatively, the aforementioned bogie wheel may be such that the opposite end portions of the first bogie body and the second bogie body are detachably connected together by a screw structure.

Optionally, in the thrust wheel, a lubricating cavity is formed in the middle of the thrust wheel body, an oil passing hole is formed in the thrust wheel body, and two ends of the oil passing hole communicate the floating seal chamber and the lubricating cavity; the oil passing hole is configured to contain a magnetic polymer filtering and adsorbing material, a tightening opening is formed in one side, located on the lubricating cavity, of the oil passing hole, and an oil hole plug is arranged on one side, located on the floating seal chamber, of the oil passing hole.

The invention provides a construction machine comprising the thrust wheel.

The technical scheme of the invention has the following advantages:

1. according to the thrust wheel provided by the invention, the opposite surfaces of the two floating seal ring bodies are first sealing surfaces, the opposite surfaces of the two extending parts are contact surfaces, the two contact surfaces are second sealing surfaces, the two contact surfaces are inclined outwards from the axial direction of the wheel shaft, namely the second sealing surfaces are inclined relative to the first sealing surfaces, and the second sealing surfaces are different from the first sealing surfaces. Under the normal sealing state of the floating sealing assembly, the two first sealing surfaces are in close contact and relatively slide to form a sealing bright band; under severe working conditions, when the thrust wheel is subjected to an offset load force and moves radially and axially, the two second sealing surfaces can be in close contact with each other to form an effective sealing bright band, the sealing effect of the floating seal ring is ensured, and oil leakage is prevented; simultaneously, the setting of extension has increased the inside entering route of impurity entering wheel body such as external dust, silt, and impurity is more difficult for current floating seal ring structure to get into in the wheel body, prevents that impurity from destroying the oil film, further prevents the thrust wheel oil leak.

2. According to the thrust wheel provided by the invention, the contact surfaces of the bending sections are multiple, the contact surfaces are different, when the floating seal sliding ring moves due to the eccentric load force of the thrust wheel, the contact surfaces of the bending sections capable of forming a sealing bright band are multiple, an effective sealing bright band can be formed all the time, and the sealing effect is ensured.

3. According to the thrust wheel provided by the invention, the two wheel bodies of the thrust wheel are detachably arranged, so that the single-side wheel body can be conveniently detached and replaced when oil leaks from one side of the thrust wheel, and the maintenance cost of the thrust wheel is saved.

4. The thrust wheel provided by the invention is provided with the oil passing hole, and the oil passing hole is suitable for accommodating the magnetic polymer filtering and adsorbing material. The magnetic polymer filtering and adsorbing material can effectively adsorb fragments generated by abrasion of the bimetallic shaft sleeve or abrasion of other parts, prevents the fragments from entering the floating seal chamber, and ensures the sealing effect of the thrust wheel.

5. According to the engineering machine provided by the invention, under a severe working condition, the two second sealing surfaces of the upper thrust wheel can be in close contact with each other to form an effective sealing bright band, so that the sealing effect of the floating seal ring is ensured, and oil leakage is prevented; simultaneously, the setting of extension has increased the inside entering route of impurity entering wheel body such as external dust, silt, and impurity is more difficult for current floating seal ring structure to get into in the wheel body, prevents that impurity from destroying the oil film, further prevents the thrust wheel oil leak.

Drawings

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

FIG. 1 is a cross-sectional view of a thrust wheel provided in accordance with an embodiment of the present invention;

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

fig. 3 is a partially enlarged view of a portion B in fig. 2.

Description of reference numerals:

1-a wheel axle; 21-a first counterweight wheel body; 22-a second thrust wheel body; 23-a thread structure; 24-a lubrication chamber; 25-oil passing holes; 251-a tightening port; 252-oil hole plugs; 26-a first recess; 3-end cover; 31-a second recess; 411-a floating seal ring body; 412-an extension; 4121-a radially extending section; 4122-bending section; 42-floating seal rubber ring; 4-magnetic polymer filtering and adsorbing material.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a thrust wheel, as shown in fig. 1 and 2, comprising an axle 1, a thrust wheel body, an end cap 3 and a floating seal assembly. Wherein, the thrust wheel body is sleeved outside the wheel shaft 1; the end cover 3 is arranged at the end part of the wheel shaft 1 and forms a floating seal chamber with the thrust wheel body, and a gap is formed between the end cover 3 and the thrust wheel body; the floating seal assembly is arranged in the floating seal chamber, the floating seal assembly comprises two floating seal rings which are sequentially arranged along the axial direction of the wheel shaft 1, and the floating seal assembly further comprises two floating seal rubber rings 42; the floating seal ring comprises a floating seal ring body 411 and an extension 412 extending outwardly from the floating seal ring body 411, said extension extending outwardly away from the radial direction of the wheel axle.

In the thrust wheel with the structure, the opposite surfaces of the two floating seal ring bodies 411 are first sealing surfaces, the opposite surfaces of the two extending parts are contact surfaces, the two contact surfaces are second sealing surfaces, the two contact surfaces are axially outwards inclined from the wheel shaft 1, for example, the contact surfaces can be inclined towards the inner part or the outer part of the thrust wheel, namely, the second sealing surfaces are inclined relative to the first sealing surfaces, and the second sealing surfaces are different from the first sealing surfaces. Under the normal sealing state of the floating sealing assembly, the two first sealing surfaces are in close contact and relatively slide to form a sealing bright band; under severe working conditions, when the thrust wheel is subjected to an offset load force and moves radially and axially, the two second sealing surfaces can be in close contact with each other to form an effective sealing bright band, the sealing effect of the floating seal ring is ensured, and oil leakage is prevented; simultaneously, the setting of extension has increased the inside entering route of impurity entering wheel body such as external dust, silt, and impurity is more difficult for current floating seal ring structure to get into in the wheel body, prevents that impurity from destroying the oil film, further prevents the thrust wheel oil leak.

Furthermore, the extending directions of the extending parts of the two floating seal rings are consistent, namely the opposite contact surfaces of the two extending parts are arranged in parallel, so that when the floating seal rings move, the two opposite and parallel contact surfaces can move oppositely and are in close contact with each other to form a sealing bright belt.

The first sealing surface and the second sealing surface are both grinding mirror surfaces, and the floating seal rubber ring 42 is arranged in the floating seal chamber and supported on the floating seal ring. Further, referring to fig. 2, the extending portion includes a radial extension 4121 disposed at an end of the floating seal ring body 411 and a bending segment 4122 disposed at an end of the radial extension 4121 and bent toward one side of the radial extension 4121, the radial extension 4121 is formed by radially extending the end of the floating seal ring body 411 outward, and the bending segment 4122 is formed by radially extending the end of the radial extension 4121 outward. The opposite surfaces of the two bending sections 4122 are used as contact surfaces of the extending parts, and the contact surfaces are in tight contact with each other when the floating seal ring moves to form a bright sealing belt, so that the sealing effect of the thrust wheel is ensured.

Optionally, the bending segment 4122 is bent or bent. For example, the bending sections 4122 are curved, and the outer wall surfaces of the two bending sections 4122 opposite to each other are smooth; referring to fig. 3, the opposite surfaces of the two bending sections 4122 are bending surfaces formed by a plurality of planes connected in sequence, that is, the contact surfaces of the bending sections 4122 are multiple and different, and when the floating seal slip ring moves due to the eccentric load of the thrust wheel, the contact surfaces of the bending sections 4122 capable of forming a seal bright band are multiple, so that an effective seal bright band can be formed all the time, and the sealing effect is ensured. For example, two bending segments 4122 are inclined from the radially extending segment 4121 to the outside of the bogie wheel body. Optionally, referring to fig. 3, a plurality of planes of the bending surface are different, the longitudinal cross-sectional shape of the bending surface may be several continuous sides of a regular polygon, or several continuous sides of any polygon, as long as the plurality of planes of the bending surface are different, when the floating seal sliding ring moves, when one plane cannot form a sealing bright band, planes inclined at other angles can form a sealing bright band, and the bending surface has a plurality of contact surfaces capable of forming the sealing bright band, so that it is ensured that an effective sealing bright band can be formed all the time when the floating seal ring moves.

Further, referring to fig. 2 and 3, the outer end face of the thrust wheel body is provided with a first concave portion 26, and the first concave portion is matched with the bending section 4122 positioned at the inner side to accommodate the bending section 4122 positioned at the inner side; the inner end face of the end cover 3 is provided with a second concave portion 31, and the second concave portion is matched with the bending section 4122 positioned on the outer side to accommodate the bending section 4122 on the outer side.

Referring to fig. 1, the bogie wheel body includes a first bogie body 21 and a second bogie body 22, and opposite end portions of the first bogie body 21 and the second bogie body 22 are detachably connected together. Because the thrust wheel trouble incidence is higher to mostly be thrust wheel unilateral oil leak, two wheel bodies welded fastening of current thrust wheel need change whole thrust wheel when thrust wheel unilateral oil leak, and the maintenance cost is high. Two wheel bodies of the thrust wheel with the structure can be detachably arranged, so that the wheel body on one side can be conveniently detached and replaced when oil leaks from one side of the thrust wheel, and the maintenance cost of the thrust wheel is saved. Alternatively, the opposite end portions of the first weight wheel body 21 and the second weight wheel body 22 are detachably connected together by a screw structure 23. For example, the end of the first thrust wheel 21 is provided with an external thread, the end of the second thrust wheel 22 is provided with an internal thread, and the internal thread and the external thread are matched to connect the two thrust wheels, so that the two wheels are conveniently connected.

The inside bimetal axle sleeve that still is equipped with of thrust wheel, bimetal axle sleeve can produce the piece because of wearing and tearing in the use, and the piece gets into the floating seal room along with lubricating oil, can lead to floating seal unusual wearing and tearing and oil leak.

Referring to fig. 1 and 2, a lubricating cavity 24 is arranged in the middle of the thrust wheel body, an oil passing hole 25 is arranged on the thrust wheel body, and two ends of the oil passing hole 25 are communicated with the floating seal chamber and the lubricating cavity 24; the oil passing hole 25 is configured to accommodate the magnetic polymer filtering and adsorbing material 4; one side of the oil passing hole 25, which is positioned in the lubricating cavity, is provided with a tightening port 251, one side of the oil passing hole 25, which is positioned in the floating seal chamber, is provided with an oil hole plug 252, and a through hole for lubricating oil to flow through is formed in the oil hole plug 252. When the thrust wheel is installed, the magnetic polymer filtering and adsorbing material 4 is firstly added into the oil passing hole 25, and then the oil hole plug 252 is placed at the outer end of the oil passing hole 25 to prevent the adsorbing material from leaking outwards. The inner end of the oil passing hole 25 is provided with a tightening opening 251, so that the effect of saving the material cost of the oil hole plug 252 is achieved while the absorption material is prevented from leaking outwards.

The magnetic polymer filtering and adsorbing material 4 can effectively adsorb fragments generated by abrasion of the bimetallic shaft sleeve or other parts, prevents the fragments from entering the floating seal chamber, and ensures the sealing effect of the thrust wheel. Specifically, the lubrication chamber 24 is formed by enclosing the inner ends of the first sheave body 21 and the second sheave body 22, oil passing holes 25 are provided in both the first sheave body 21 and the second sheave body 22, and the oil passing holes 25 are symmetrically provided in both the sheave bodies.

Example 2

The present embodiment provides a construction machine including the thrust wheel of embodiment 1.

In the engineering machinery with the structure, under a severe working condition, the two second sealing surfaces of the upper thrust wheel can be in close contact with each other to form an effective sealing bright band, so that the sealing effect of the floating seal ring is ensured, and oil leakage is prevented; simultaneously, the setting of extension has increased the inside entering route of impurity entering wheel body such as external dust, silt, and impurity is more difficult for current floating seal ring structure to get into in the wheel body, prevents that impurity from destroying the oil film, further prevents the thrust wheel oil leak.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.