阅读说明：本技术 一种重型铰链用动密封结构及其动密封圈 (Dynamic seal structure for heavy hinge and dynamic seal ring thereof ) 是由 戴华 张金文 许慧玲 李斌苗 蒋灵怡 于 2020-04-29 设计创作，主要内容包括：本发明涉及一种重型铰链用动密封结构及其动密封圈,包括相互配合设置的铰链体一和铰链体二,两者相接的端部分别延伸有铰接部一和铰接部二,铰接部一和铰接部二上下设置并共同安装有通轴以实现铰链的转动；通轴上依次套装有动密封圈和垫片,动密封圈的密封唇一与通轴外侧面贴合,动密封圈的密封唇二与垫片贴合；垫片向下嵌入铰接部二的内部,垫片与铰接部二之间的间隙处安装有O型圈；本发明中动密封圈与垫片的匹配设置,防护了铰链铰接部分免受雨水和灰尘的侵蚀,延长了重型铰链的寿命,使得重型铰链更加耐用,并且动密封圈本身的结构使得在铰接部一和铰接部二的轴心偏离时具备容错密封性。(The invention relates to a dynamic seal structure for a heavy hinge and a dynamic seal ring thereof, which comprise a hinge body I and a hinge body II which are matched with each other, wherein the connected end parts of the hinge body I and the hinge body II extend to form a hinge part I and a hinge part II respectively; the through shaft is sequentially sleeved with a movable sealing ring and a gasket, a first sealing lip of the movable sealing ring is attached to the outer side surface of the through shaft, and a second sealing lip of the movable sealing ring is attached to the gasket; the gasket is downwards embedded into the second hinge part, and an O-shaped ring is arranged in a gap between the gasket and the second hinge part; according to the heavy hinge, the movable sealing ring and the gasket are arranged in a matched mode, so that the hinge part of the hinge is protected from being corroded by rainwater and dust, the service life of the heavy hinge is prolonged, the heavy hinge is more durable, and the structure of the movable sealing ring enables the hinge part I and the hinge part II to have fault-tolerant sealing performance when the axes of the hinge parts are deviated.)

1. A dynamic seal structure for a heavy hinge comprises a hinge body I (1) and a hinge body II (2) matched with the hinge body I (1), wherein the connected end parts of the hinge body I and the hinge body II are respectively extended with a hinge part I (11) and a hinge part II (21), and the hinge part I (11) and the hinge part II (21) are arranged up and down and are jointly provided with a through shaft (3) to realize the rotation of the hinge; the method is characterized in that: a gasket (4) is sleeved on the through shaft (3), a boss I (41) extends upwards from the top of the gasket (4), and a movable sealing ring (6) is sleeved on the through shaft (3) above the gasket (4); the dynamic seal ring (6) comprises a first seal lip (64) and a second seal lip (61), the first seal lip (64) is sleeved on the circumferential surface of the through shaft (3), and the second seal lip (61) is sleeved on the outer side surface of the first boss (41); the gasket (4) is downwards embedded into the inner part of the second hinge part (21).

2. The dynamic seal structure for a heavy duty hinge according to claim 1, wherein: the dynamic seal ring (6) is structurally characterized in that: the dynamic sealing ring comprises a sealing ring body (62) with a circular ring structure, wherein the inner wall surface of the sealing ring body (62) forms a first sealing lip (64) of a dynamic sealing ring (6), and the outer edge of the sealing ring body (62) extends downwards to form a second sealing lip (61).

3. The dynamic seal structure for a heavy duty hinge according to claim 2, wherein: the outer edge of the sealing ring body (62) extends downwards and bends inwards to form a second sealing lip (61) with a necking structure.

4. A dynamic seal structure for a heavy duty hinge according to claim 3, wherein: the outer edge of the sealing ring body (62) and the second sealing lip (61) are in transition through a convex structure (63), and the convex structure (63) is a convex arc structure or a convex folded angle structure.

5. The dynamic seal structure for a heavy duty hinge according to claim 1, wherein: the second sealing lip (61) and the first boss (41) of the gasket (4) are in sealing line contact or annular surface contact.

6. The dynamic seal structure for a heavy duty hinge according to claim 1, wherein: an annular bulge (31) extends on the circumferential surface of the through shaft (3) along the circumferential direction, and a first sealing lip (64) of the dynamic sealing ring (6) is sleeved below the annular bulge (31).

7. The dynamic seal structure for a heavy duty hinge according to claim 1, wherein: a bearing bin with a circular hole structure is arranged in the center of the top of the second hinged part (21), the through shaft (3) penetrates through the gasket (4) downwards, and a bearing is arranged between the end head of the lower end of the through shaft (3) below the gasket (4) and the inner wall surface of the bearing bin; the lower part of the gasket (4) extends into the bearing bin, and a gap is formed between the bottom end face of the gasket (4) and the top face of the bearing.

8. The dynamic seal structure for a heavy duty hinge according to claim 1, wherein: the structure of the gasket (4) is as follows: the hinge comprises a sheet body (40) with an annular structure, wherein the top and the bottom of the sheet body (40) respectively extend outwards to form a first boss (41) and a second boss (43), the second boss (43) extends into the hinge part II (21), and a groove (42) with an annular structure is formed at the joint of the bottom of the sheet body (40) and the second boss (43); an inner hole (44) is formed in the center of the upper and lower penetrating sheet body (40), and the inner hole (44) is in clearance fit with the through shaft (3);

the gasket (4) is made of metal, the gasket (4) is locked on the second hinge part (21) through a bolt (5), and an O-shaped ring (7) is embedded in a groove (42) of the gasket (4).

9. A dynamic seal ring is characterized in that: the sealing ring comprises a sealing ring body (62) with a circular ring structure, wherein the inner wall surface of the sealing ring body (62) forms a first sealing lip (64) of a dynamic sealing ring (6); the sealing ring body (62) extends outwards to form a second sealing lip (61) of the dynamic sealing ring (6).

10. A dynamic seal ring according to claim 9, wherein: the outer edge of the sealing ring body (62) extends downwards and bends inwards to form a second sealing lip (61) with a necking structure.

11. A dynamic seal ring according to claim 10, wherein: the outer edge of the sealing ring body (62) is transited with the second sealing lip (61) through a convex structure (63).

12. A dynamic seal ring according to claim 11, wherein: the convex structure (63) is a convex arc structure or a convex folding angle structure.

13. A dynamic seal ring according to claim 9, wherein: the thickness of the dynamic sealing ring (6) decreases progressively towards the direction of the second sealing lip (61).

14. A dynamic seal ring according to claim 9, wherein: and the second sealing lip (61) is in elastic sealing line contact or annular surface contact.

15. A dynamic seal ring according to claim 9, wherein: the center line of the first sealing lip (64) and the center line of the second sealing lip (61) are collinear.

Technical Field

The invention relates to the technical field of application of heavy hinges, in particular to a dynamic sealing structure for a heavy hinge and a dynamic sealing ring thereof.

Background

Hinges, also known as hinges, are mechanical devices used to connect two solids and allow relative rotation between them.

Hinges for heavy doors are generally required to have low drag and to resist corrosion because of the need to carry heavy loads.

The existing heavy hinges on the market are generally divided into two types of structures. One type is a mode of directly adopting the sleeve connection of an upper hinge shaft and a lower hinge shaft, the structure is open, the friction force is large when the hinge shaft and the lower hinge shaft rotate relatively, and the hinge shaft is easy to corrode and rust when meeting rainwater, so that the hinge shaft cannot be opened effectively in a rotating way, and is not suitable for outdoor occasions; the other type is an improved hinge with a bearing chamber, a shaft of an upper hinge is connected with a bearing in a bearing chamber of a lower hinge, and an interface between the bearing chamber and the shaft is sealed by an elastic rubber ring. Although the rotation retardation force of the hinge is improved, the sealing ring of the hinge is not fault-tolerant in design, and sealing cannot be realized as long as the hinge shaft and the bearing bin are slightly matched; in actual use, the installation error of the hinge is usually about 1mm, so that the bearing bin of the hinge is easy to enter water and dust, lubricating grease needs to be frequently replaced to keep the performance of the bearing bin, and the hinge is complex to maintain and high in cost; and for little excessive cooperation between this rubber circle and the hinge pin, when rainwater weather, the rainwater presses on the gasket in rubber circle outside, gets off to very easily lead to the bearing storehouse to intake for a long time, does not reach rain-proof effect.

Disclosure of Invention

The applicant aims at the defects in the prior art and provides a dynamic sealing structure for a heavy hinge and a dynamic sealing ring thereof, wherein the dynamic sealing structure is reasonable in structure, so that the hinge is prevented from being corroded and corroded by rainwater and dust in the using process, can be used for a long time without maintenance, and keeps the performance as new.

The technical scheme adopted by the invention is as follows:

a dynamic seal structure for a heavy hinge comprises a hinge body I and a hinge body II matched with the hinge body I, wherein a hinge part I and a hinge part II extend from the connected end parts of the hinge body I and the hinge part II respectively, and the hinge part I and the hinge part II are arranged up and down and are provided with a through shaft together to realize the rotation of the hinge; a gasket is sleeved on the through shaft, a first boss extends upwards from the top of the gasket, and a movable sealing ring is sleeved on the through shaft above the gasket; the dynamic seal ring comprises a first seal lip and a second seal lip, the first seal lip is sleeved on the circumferential surface of the through shaft, and the second seal lip is sleeved on the outer side surface of the first boss; the gasket is downwards embedded into the inner part of the second hinge part.

As a further improvement of the above technical solution:

the structure of the dynamic seal ring is as follows: the sealing ring comprises a sealing ring body with a circular ring structure, wherein the inner wall surface of the sealing ring body forms a first sealing lip of a movable sealing ring, and the outer edge of the sealing ring body extends downwards to form a second sealing lip.

The outer edge of the sealing ring body extends downwards and bends inwards to form a second sealing lip of a necking structure.

The outer edge of the sealing ring body and the second sealing lip are in transition through a convex structure, and the convex structure is a convex arc structure or a convex folded angle structure.

And the second sealing lip is in line sealing contact or ring surface contact with the first boss of the gasket.

An annular bulge extends on the circumferential surface of the through shaft along the circumferential direction, and a sealing lip of the dynamic sealing ring is sleeved below the annular bulge.

A bearing bin with a circular hole structure is arranged at the center of the top of the second hinged part, the through shaft penetrates through the gasket downwards, and a bearing is arranged between the end head at the lower end of the through shaft below the gasket and the inner wall surface of the bearing bin; the lower part of the gasket extends into the bearing bin, and a gap is formed between the bottom end face of the gasket and the top face of the bearing.

The structure of the gasket is as follows: the hinge comprises a sheet body with an annular structure, wherein the top and the bottom of the sheet body respectively extend outwards to form a first boss and a second boss, the second boss extends into a hinge part II, and a groove with an annular structure is formed at the joint of the bottom of the sheet body and the second boss; an inner hole is formed in the center of the upper and lower penetrating sheet body, and the inner hole is in clearance fit with the through shaft;

the gasket is made of metal and is locked on the second hinge part through a bolt, and an O-shaped ring is embedded in a groove of the gasket.

A dynamic seal ring comprises a seal ring body with a circular ring structure, wherein the inner wall surface of the seal ring body forms a first seal lip of the dynamic seal ring; the sealing ring body extends outwards to form a second sealing lip of the dynamic sealing ring.

As a further improvement of the above technical solution:

the outer edge of the sealing ring body extends downwards and bends inwards to form a second sealing lip of a necking structure.

And the outer edge of the sealing ring body and the second sealing lip are in transition through a convex structure.

The convex structure is a convex arc structure or a convex folding angle structure.

The thickness of the dynamic sealing ring decreases progressively towards the direction of the second sealing lip.

The second sealing lip is in line sealing connection or ring surface contact.

The center line of the first sealing lip and the center line of the second sealing lip are collinear.

The invention has the following beneficial effects:

the hinge is compact and reasonable in structure and convenient to operate, the movable sealing ring and the gasket are sleeved on the through shaft at the interval between the first hinge part and the second hinge part, the movable sealing ring is sleeved below the annular bulge of the through shaft, the sealing lip II of the necking of the movable sealing ring is tightly attached to the outer side surface of the boss I of the gasket, the lower part of the gasket is embedded into the bearing bin of the second hinge part, and the O-shaped ring for increasing the sealing property is arranged at the joint, so that when the first hinge body and the second hinge body are effectively connected, rainwater and dust are effectively prevented from entering the rotating part of the hinge, the service performance of the hinge is greatly improved, and the service life of the hinge;

and the sealing lip is sleeved on the circumferential surface of the through shaft, the sealing lip is sleeved on the outer side surface of the boss I of the gasket, the sealing lip II is in linear sealing contact or ring surface contact with the boss I, when the hinge part I and the axis of the hinge part II deviate to a certain extent, the movable sealing ring can still be in effective contact fit with the through shaft and the gasket through elastic deformation of the movable sealing ring, the integral waterproof and dustproof performance of the hinge is ensured, and the existence of the movable sealing ring enables the hinge to have fault tolerance during assembly.

The invention also comprises the following advantages:

the dynamic sealing ring extends downwards and inwards to form a second sealing lip through the transition of the convex structure, when the dynamic sealing ring is impacted by external pressure or rainwater, the outer edge of the dynamic sealing ring is contracted inwards through the convex structure, the sealing performance is stronger, and the integral connection tightness is better;

the gasket is locked on the second hinge part through the bolt, so that the sealing performance between the gasket and the second hinge part is more reliable;

the movable sealing ring is sleeved below the annular bulge, and the annular bulge axially supports and limits the movable sealing ring, so that a second sealing lip at the edge of the lower part of the movable sealing ring is always attached to the outer wall surface of the first boss at the upper end of the gasket;

a gap is formed between the lower part of the gasket and the top of the bearing, an inner hole in the middle of the gasket is sleeved with the gap of the through shaft, an inner ring and an outer ring of the bearing are fixedly connected with the through shaft and the hinged part II respectively, and the existence of the bearing ensures the smoothness of rotation.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a front view (partially sectional view) of fig. 1.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic view of the installation of the dynamic seal ring, the gasket and the through shaft of the present invention.

Fig. 6 is a schematic structural view of a dynamic seal ring according to a third embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a dynamic seal ring according to the present invention (embodiment four).

Fig. 8 is a schematic structural view of the dynamic seal ring according to the present invention (embodiment five).

Fig. 9 is a schematic structural view of a dynamic seal ring according to the present invention (sixth embodiment).

Wherein: 1. a first hinge body; 11. a first hinge part; 2. a second hinge body; 21. a second hinge part; 3. passing through the shaft; 31. an annular projection; 4. a gasket; 40. a sheet body; 41. a first boss; 42. a groove; 43. a second boss; 44. an inner bore; 5. a bolt; 6. a movable sealing ring; 61. a second sealing lip; 62. a seal ring body; 63. a convex structure; 64. a first sealing lip; 7. and an O-shaped ring.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and 2, the dynamic seal structure for a heavy hinge in the first embodiment includes a hinge body 1, a hinge body 2 disposed in cooperation with the hinge body 1, a hinge portion 11 and a hinge portion 21 respectively extending from the end of the hinge body 1, the hinge portion 11 and the hinge portion 21 being disposed at an interval from top to bottom and jointly provided with a through shaft 3 to realize the rotation of the hinge; a gasket 4 is sleeved on the through shaft 3 at the interval between the first hinge part 11 and the second hinge part 21, a boss 41 extends upwards from the top of the gasket 4, and a movable sealing ring 6 is sleeved on the through shaft 3 above the gasket 4; as shown in fig. 5 and 6, the dynamic seal ring 6 comprises a first seal lip 64 and a second seal lip 61, the first seal lip 64 is sleeved on the circumferential surface of the through shaft 3, the second seal lip 61 is sleeved on the outer side surface of a first boss 41 on the upper part of the gasket 4, the two seal lips of the dynamic seal ring 6 are respectively attached to the through shaft 3 and the gasket 4, and certain elasticity is provided to accommodate the deviation of the axis between the two while the sealing performance of the joint of the through shaft 3 and the gasket 4 is met and ensured; as shown in fig. 3 and 4, the spacer 4 is inserted downward into the inside of the hinge portion 21.

The structure of the dynamic seal ring 6 is as follows: the dynamic sealing ring comprises a sealing ring body 62 with a circular ring structure, wherein the inner wall surface of the sealing ring body 62 forms a first sealing lip 64 of the dynamic sealing ring 6, and the outer edge of the sealing ring body 62 extends downwards to form a second sealing lip 61.

The outer edge of the sealing ring body 62 extends downwards and bends inwards to form a second sealing lip 61 with a necking structure.

The outer edge of the sealing ring body 62 and the second sealing lip 61 are transited through a convex structure 63, and the convex structure 63 is a convex arc structure or a convex folded angle structure.

Two sealing lips of the movable sealing ring 6 are respectively attached to the circumferential surface of the through shaft 3 and the circumferential surface of the first boss 41 on the gasket 4, so that the hinge body I1 and the hinge body II 2 are effectively connected, rainwater and dust are effectively prevented from entering the rotating part of the hinge, and the service performance and the service life of the hinge are greatly improved; and the existence of evagination structure 63 for dynamic seal 6 is because of the atress of evagination structure 63 department and the inside shrink of sealing lip two 61 when receiving external pressure or rainwater impact, has strengthened the leakproofness more, thereby makes the compactness of integral connection better.

The second sealing lip 61 and the first boss 41 of the gasket 4 are in elastic line sealing contact or annular surface contact; when the axes of the first hinge part 11 and the second hinge part 21 deviate to a certain extent, the movable sealing ring 6 can still be in effective contact fit with the through shaft 3 and the gasket 4 through elastic deformation of the movable sealing ring, so that the overall waterproof and dustproof performance of the hinge is ensured, and the elastic contact between the second sealing lip 61 and the gasket 4 further ensures the fault tolerance of the hinge during assembly.

An annular bulge 31 extends on the circumferential surface of the through shaft 3 along the circumferential direction, a first sealing lip 64 of the movable sealing ring 6 is sleeved below the annular bulge 31, and the annular bulge 31 axially supports and limits the movable sealing ring 6, so that a second sealing lip 61 at the lower part of the movable sealing ring 6 is always attached to a first boss 41 at the upper end part of the gasket 4.

A bearing bin with a circular hole structure is arranged at the center of the top of the second hinge part 21, the through shaft 3 downwards penetrates through the gasket 4, and a bearing is arranged between the end head of the lower end of the through shaft 3 below the gasket 4 and the inner wall surface of the bearing bin; the lower part of the gasket 4 extends into the bearing bin, and a gap is arranged between the bottom end surface of the gasket 4 and the top surface of the bearing.

The structure of the gasket 4 is: the bearing box comprises a sheet body 40 with an annular structure, wherein the top and the bottom of the sheet body 40 are respectively provided with a first boss 41 and a second boss 43 which extend outwards, the second boss 43 extends into the bearing box of the hinge part two 21, and the joint of the bottom of the sheet body 40 and the second boss 43 is provided with a groove 42 with an annular structure; an inner hole 44 is formed in the center of the upper and lower penetrating sheet body 40, and the inner hole 44 is in clearance fit with the through shaft 3;

the gasket 4 is made of metal, and the gasket 4 is locked on the second hinge part 21 through the bolt 5, so that the sealing performance between the gasket 4 and the second hinge part 21 is more reliable; an O-shaped ring 7 is embedded in the groove 42 of the gasket 4, and the O-shaped ring 7 ensures the connection tightness between the gasket 4 and the second hinge part 21.