CN214946376U - Sealing device and image acquisition equipment with same - Google Patents

Abstract

The utility model relates to a sealing device and have its image acquisition equipment. The sealing device includes: the cross section of the rigid framework is annular; the flexible sealing part comprises an outer sealing structure made of a first material and an inner sealing structure made of a second material, the outer sealing structure covers the outer ring of the rigid framework, the inner sealing structure is arranged on the inner ring of the rigid framework and extends along the axial direction of the rigid framework, and the first material and the second material are different. The sealing device has better use effect.

Description

Sealing device and image acquisition equipment with same

Technical Field

The utility model relates to the field of mechanical equipment, especially, relate to a sealing device and have its image acquisition equipment.

Background

With the rapid development of image capturing and processing technologies, image capturing apparatuses are increasingly widely used in various fields, for example, in the security field, the image capturing apparatuses are used as monitoring apparatuses, which requires that the image capturing apparatuses can be rotated horizontally and vertically. In order to ensure that the rotating mechanism of the image capturing apparatus can operate normally for a long time, the image capturing apparatus installed outdoors needs to be waterproof and dustproof.

The current image acquisition equipment mainly adopts a mode that a waterproof cover shields a rotating mechanism to carry out water prevention and dust prevention. But the waterproof cover has poor sealing performance, can not effectively prevent water vapor from permeating the rotating mechanism, can cause the rotating mechanism to rust for a long time, and influences the operating flexibility. And under the low temperature or harsher environmental condition, the buckler is easy to age and appear the crackle, can not play the effect of effective protection slewing mechanism.

For the mode of sealing the rotating mechanism by adopting the sealing ring, the sealing ring is arranged on the rotating shaft, but if the sealing ring is not tightly or not contacted with the rotating shaft, the sealing ring does not have good oil storage capacity; if the sealing washer is too inseparable with the pivot contact, then the frictional force of sealing washer and pivot is too big, influences the rotation performance of pivot, and the sealing washer is difficult to bear outdoor abominable humiture environment moreover, and is ageing easily, leads to life to reduce.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is needed to provide a sealing device and an image capturing apparatus having the same, so as to solve the problem of poor using effect of the existing sealing device.

The utility model provides a pair of sealing device, it includes: a rigid skeleton; the flexible sealing part is wrapped on the rigid framework and comprises an outer sealing structure made of a first material and an inner sealing structure made of a second material, the outer sealing structure is located on the outer ring of the rigid framework, the inner sealing structure is located on the inner ring of the rigid framework, and the first material and the second material are different.

So set up, this sealing device's rigid frame is used for supporting flexible sealing to promote the holistic structural strength of sealing device. The outer seal structure in the flexible sealing part is mainly used for sealing the outside and preventing water vapor, dust and the like in the external environment from entering, so that the water vapor and the like are prevented from corroding the rotating shaft and other structures inside the rotating shaft, and the rotating shaft is ensured to rotate smoothly. The inner sealing structure is mainly used for preventing lubricating oil of the rotating shaft from leaking, and the inner sealing structure is matched with the rotating shaft. Because the environment that outer seal structure and interior seal structure were located when the during operation is different, therefore both choose different materials for use to ensure to adapt to the environment that is located respectively better, with promotion durability and life, solve current sealing washer can not effectively prevent the problem that lubricating oil leaked when adapting to external environment.

In one embodiment, the inner side of the inner sealing structure is provided with a first annular pointed protrusion, which protrudes in the radial direction of the rigid framework and is used for abutting against the rotating shaft to be sealed.

So set up, can be so that interior seal structure and pivot complex sealed effect are better.

In one embodiment, the first annular pointed projection comprises a first surface and a second surface, the first surface and the second surface intersect to form an included angle, the first surface and the central axis of the rigid skeleton form a first included angle therebetween, the second surface and the central axis of the rigid skeleton form a second included angle therebetween, and the first included angle is greater than the second included angle.

So set up, can avoid influencing the pivot and rotate when guaranteeing the leakproofness.

In one embodiment, the first included angle is 45 ° and/or the second included angle is 30 °.

So set up for processing is convenient more and the leakproofness is good.

In one embodiment, the surface of the inner seal structure facing the outer seal structure is sleeved with a cinching spring.

So set up, can avoid influencing sealed effect after wearing and tearing.

In one embodiment, the sealing device further comprises a dustproof structure, the dustproof structure is arranged on the inner ring of the rigid framework and connected with the inner sealing structure, and an oil storage tank is arranged between the dustproof structure and the inner sealing structure.

So set up, can realize sealing and realizing dustproof lubricating oil.

In one embodiment, the dustproof structure comprises a second annular sharp-corner bulge, and the second annular sharp-corner bulge protrudes along the radial direction of the rigid framework and is used for being abutted with the rotating shaft to be sealed.

So set up, can guarantee dustproof construction and pivot complex sealed effect.

In one embodiment, the second annular pointed projection comprises a third surface and a fourth surface, the third surface and the fourth surface intersect to form a pointed angle, the third surface and the rigid skeleton form a third included angle, the fourth surface and the rigid skeleton form a fourth included angle, and the difference between the angle of the third included angle and the angle of the fourth included angle is smaller than a set value.

So set up, can make the bellied processing of second annular closed angle more convenient.

In one embodiment, the inner diameter of the first annular pointed protuberance is smaller than the inner diameter of the second annular pointed protuberance, and the difference between the inner diameter of the first annular pointed protuberance and the inner diameter of the second annular pointed protuberance ranges from 0.3mm to 0.6 mm.

So set up, can ensure sealed effect.

According to the utility model discloses an on the other hand provides an image acquisition equipment, and image acquisition equipment includes the camera, the pivot of being connected with the camera and foretell sealing device, and the sealing device cover is established in the pivot.

By the arrangement, the service life of the image acquisition equipment can be longer.

Drawings

Fig. 1 is a schematic partial cross-sectional view of a first sealing device according to an embodiment of the present invention;

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

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

fig. 4 is a schematic partial cross-sectional view of a second sealing device according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a first sealing device according to an embodiment of the present invention.

Description of reference numerals:

1. a rotating shaft; 2. a rigid skeleton; 3. an outer seal structure; 4. an inner sealing structure; 41. the first annular sharp corner is convex; 5. a dust-proof structure; 51. the second annular sharp corner is convex; 7. a spring is hooped; 8. grease; 9. an oil storage tank; 10. an oil drainage groove; 11. and a diversion trench.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-5, the present invention provides a sealing device, which includes a rigid frame 2 and a flexible sealing portion, the flexible sealing portion covers the rigid frame 2, and the flexible sealing portion includes an outer sealing structure 3 using a first material and an inner sealing structure 4 using a second material, the outer sealing structure 3 is located at an outer ring of the rigid frame 2, the inner sealing structure 4 is located at an inner ring of the rigid frame 2, and the first material is different from the second material.

The rigid frame 2 of the sealing device is used for supporting the flexible sealing part so as to improve the integral structural strength of the sealing device. The outer seal structure 3 in the flexible sealing part is mainly used for sealing outwards, and prevents water vapor, dust and the like in the external environment from entering, so that the water vapor and the like are prevented from corroding the rotating shaft and other structures inside, and the rotating shaft is guaranteed to rotate smoothly. The inner sealing structure 4 is mainly used for preventing lubricating oil of the rotating shaft from leaking, and the inner sealing structure 4 is matched with the rotating shaft 1. Because the environment that outer seal structure 3 and inner seal structure 4 were located when the during operation is different, therefore both choose different materials for use to ensure to adapt to the environment that is located respectively better, with promotion durability and life, solve current sealing washer can not effectively prevent the problem of lubricating oil leakage when adapting to external environment.

The materials of the outer sealing structure 3 and the inner sealing structure 4 may be appropriately selected according to the specific use environment.

Preferably, the material of the outer sealing structure 3 may be at least one of anti-aging nitrile rubber, anti-aging silicone rubber, anti-aging fluorine rubber, anti-aging chloroprene rubber, and the like. The materials have the characteristics of strong ageing resistance, high temperature resistance, low temperature resistance, good weather resistance and the like, and can fully respond to outdoor environment.

The material of the inner seal structure 4 may be HNBR (hydrogenated nitrile rubber), oil-resistant fluororubber, oil-resistant nitrile rubber, PTFE (polytetrafluoroethylene), or the like. The inner sealing structure 4 made of the material can resist oil on one hand, corrosion of lubricating oil to the inner sealing structure 4 is avoided, and the inner sealing structure 4 has better wear resistance, so that the service life can be prolonged.

In the embodiment, the inner seal structure 4 is rotationally sealed with the bearing of the rotating shaft 1, so that nitrile rubber with good oil resistance can be adopted, the shore hardness is 70 degrees, the low temperature resistance is below minus 45 ℃, and the high temperature resistance is above 100 ℃.

The outer sealing structure 3 and the inner sealing structure 4 are respectively formed by selecting materials with different characteristics, so that the structure can adapt to specific environments with different structures, and the service life of the whole structure is prolonged. For example, for a high temperature environment, a fluororubber material may be used because of its high temperature resistance characteristics. Similarly, HNBR materials can be adopted to fully exert the characteristics of low temperature resistance and wear resistance in the use environment with low temperature and large wear. In addition, the PTFE material can also be used in the service environment with high abrasion so as to utilize the abrasion resistance and self-lubricating property of the PTFE material. Aiming at the service environment with strong external corrosion and easy aging, the silicon rubber can be adopted to utilize the characteristics of high temperature resistance, low temperature resistance and good weather resistance. Different material combinations can be used to adapt to different working conditions, the required inner sealing structure 4 and the required outer sealing structure 3 are formed by the forming combination of different materials, so that the reliability and the service life of each structural part of the sealing device are optimized, the reliability and the service life of the sealing device are integrally improved, the power consumption is reduced, and the life cycle of a product is prolonged.

Besides the inner sealing structure 4 and the outer sealing structure 3, other structures of the sealing device can also adopt proper materials according to requirements, so that different structures of the sealing device adopt different materials, and the sealing device is higher in overall adaptability, higher in reliability and longer in service life under the condition that the flexible sealing parts are integrated.

As shown in fig. 1, in the present embodiment, the rigid framework 2 may be an annular thin-walled rigid member, and the radial cross-sectional shape of the rigid framework is L-shaped, so as to improve the overall structural strength. The material of the rigid skeleton 2 may be determined as needed.

The inner sealing structure 4 and the outer sealing structure 3 form an integrated flexible sealing part which is wrapped outside the rigid framework 2 and is used for realizing the sealing function.

Wherein, the outer seal structure 3 wraps up in the outer lane of rigid frame 2, mainly used prevents the entering of outside steam etc..

The inner seal structure 4 protrudes inward of the inner ring of the rigid frame 2 so as to be engaged with the rotary shaft 1. In the present embodiment, the inner side of the inner seal structure 4 is provided with a first annular pointed protrusion 41, and the first annular pointed protrusion 41 protrudes in the radial direction of the rigid frame 2 and is adapted to abut against the rotating shaft 1 to be sealed. The first annular pointed projection 41 is intended to abut against the rotary shaft 1, so that a good seal is achieved, and since it is a pointed projection, it is possible to reduce adverse effects on the rotation of the rotary shaft 1 while ensuring the seal.

Preferably, the first annular pointed projection 41 comprises a first surface and a second surface, the first surface and the second surface intersecting to form a point, the first surface and the central axis of the rigid skeleton 2 form a first included angle a, the second surface and the central axis of the rigid skeleton 2 form a second included angle b, and the angle of the first included angle a is larger than that of the second included angle b. As shown in FIG. 1, the first surface may be a bevel on the side close to the inner end surface of the sealing device and the second surface is the other surface of the first annular pointed protrusion 41. The included angle between the two surfaces and the axis of the rigid framework 2 is set to be different values, so that the sealing effect is better.

Preferably, the first angle a is 45 ° and/or the second angle b is 30 °. The value has better processability, reduces the processing cost and can obtain better sealing effect.

Optionally, in order to avoid that the sealing effect is poor after abrasion, the surface of the inner sealing structure 4 facing the outer sealing structure 3 is sleeved with a tightening spring 7. The tightening spring 7 is sleeved in the annular groove of the inner sealing structure 4, and enables the inner sealing structure 4 to be tightened on the rotating shaft 1.

Optionally, the sealing device further comprises a dustproof structure 5, the dustproof structure 5 is arranged at the inner ring of the rigid framework 2 and connected with the inner sealing structure 4, and an oil storage tank is arranged between the dustproof structure 5 and the inner sealing structure 4. Dustproof structure 5 can realize dustproof, forms the oil storage tank with interior seal structure 4 cooperation moreover to preserve lubricating oil.

In the present embodiment, the oil reservoir is provided with grease 8, and the grease 8 is used for lubricating the rotating shaft 1.

In this embodiment, the dust-proof structure 5 also extends along the inner side of the inner ring of the rigid framework 2, and the dust-proof structure 5 comprises a second annular sharp-corner bulge 51, and the second annular sharp-corner bulge 51 protrudes along the radial direction of the rigid framework 2 and is used for abutting against the rotating shaft 1 to be sealed. The second annular pointed bulge 51 is arranged, so that the second annular pointed bulge is better matched with the rotating shaft 1.

Optionally, the second annular pointed protrusion 51 includes a third surface and a fourth surface, the third surface and the fourth surface intersect to form a pointed angle, a third included angle c is formed between the third surface and the rigid framework 2, a fourth included angle d is formed between the fourth surface and the rigid framework 2, and a difference between an angle of the third included angle c and an angle of the fourth included angle d is smaller than a set value.

Wherein the third surface is the side surface of the second angular ring projection 51 facing the oil reservoir and the fourth surface is the other surface forming the second angular ring projection 51. The dustproof structure 5 with the structure has a good protection effect. The set value may be determined as necessary, and is, for example, 10 °, 5 °, 1 °, 0 °, or the like.

For example, the third angle c and the fourth angle d may be 45 °.

Preferably, the inner diameter of the first annular pointed projection 41 (which may also be referred to as the inner diameter of the inner sealing lip) is smaller than the inner diameter of the second annular pointed projection 51 (which may also be referred to as the inner diameter of the dust lip), and the difference between the inner diameter of the first annular pointed projection 41 and the inner diameter of the second annular pointed projection 51 ranges from 0.3mm to 0.6 mm. This facilitates assembly and ensures sufficient sealing.

In the present embodiment, the dust-proof structure 5 has a diversion trench 11 at the connection position with the outer sealing structure 3. The diversion trench 11 is used for diversion, which is convenient for the peripheral liquid to be guided out, so that the peripheral liquid is not easy to deposit, thereby being better sealed. It should be noted that the dustproof structure 5 may be integrally formed with the outer seal structure 3 and the inner seal structure 4.

In addition to the sealing arrangement shown in fig. 1, a second sealing arrangement is shown in fig. 4, which differs from the first sealing arrangement shown in fig. 1 mainly in the arrangement at the oil reservoir. In the second sealing device, an oil drainage groove 10 is provided in the oil storage groove 9 to distribute the lubricating oil uniformly in the circumferential direction.

According to the utility model discloses an on the other hand provides an image acquisition equipment, and image acquisition equipment includes the camera, the pivot 1 and foretell sealing device be connected with the camera, and the sealing device cover is established in pivot 1. The image acquisition equipment adopting the sealing device has better sealing performance, and different structures are made of different materials and can adapt to specific use requirements and environments of various structures, so that the whole adaptability is better, the service life is longer, and the reliability and the service life of the image acquisition equipment are better.

In summary, the sealing device for rotary sealing of the present embodiment utilizes different silicone rubber materials, and can adapt to different environments, and the outer sealing structure, the inner sealing structure, and the dust-proof structure can be made of different materials. Therefore, the reliability and the service life can be improved, the power consumption is reduced, and at least one of anti-aging nitrile rubber, silicon rubber, fluororubber, chloroprene rubber and the like can be applied to the external sealing structure. At least one of HNBR, fluororubber, nitrile rubber, PTFE and the like with good wear resistance and weather resistance can be applied to the inner sealing structure, so that the reliability can be ensured to be improved.

The problem that the contact degree of an existing common sealing ring and a rotating shaft is not well controlled is solved through the sealing device, the problem that the sealing device can only adapt to one environment and is poor in adaptability can be solved, the use field of the sealing device is enlarged, the service life and the reliability of the sealing device are prolonged, and power consumption is reduced.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. A seal assembly, comprising:

a rigid skeleton (2);

the flexible sealing portion coats the rigid framework, the flexible sealing portion comprises an outer sealing structure (3) made of a first material and an inner sealing structure (4) made of a second material, the outer sealing structure (3) is located on the outer ring of the rigid framework (2), the inner sealing structure (4) is located on the inner ring of the rigid framework (2), and the first material and the second material are different.

2. Sealing device according to claim 1, characterized in that the inner side of the inner sealing structure (4) is provided with a first annular pointed projection (41), said first annular pointed projection (41) projecting in the radial direction of the rigid skeleton (2) and being intended to abut against the rotating shaft (1) to be sealed.

3. A sealing arrangement according to claim 2, wherein the first annular pointed projection (41) comprises a first surface and a second surface, the first surface and the second surface intersecting to form a point, the first surface and the central axis of the rigid skeleton (2) forming a first angle therebetween, the second surface and the central axis of the rigid skeleton (2) forming a second angle therebetween, the angle of the first angle being greater than the angle of the second angle.

4. A sealing arrangement according to claim 3, wherein the angle of the first included angle is 45 ° and/or the second included angle is 30 °.

5. A sealing arrangement according to any one of claims 1-4, characterized in that the surface of the inner sealing structure (4) facing the outer sealing structure (3) is provided with a garter spring (7).

6. The sealing arrangement according to claim 2, characterized in that the sealing arrangement further comprises a dust structure (5), the dust structure (5) being arranged at an inner ring of the rigid skeleton (2) and being connected with the inner sealing structure (4), an oil reservoir being arranged between the dust structure (5) and the inner sealing structure (4).

7. The sealing device according to claim 6, characterized in that the dust-protection structure (5) comprises a second annular pointed projection (6), said second annular pointed projection (6) projecting in the radial direction of the rigid skeleton (2) and being intended to abut against the rotating shaft (1) to be sealed.

8. A sealing arrangement according to claim 7, characterized in that the second annular pointed projection (6) comprises a third surface and a fourth surface, which intersect to form a point, the third surface having a third angle with the rigid skeleton (2), the fourth surface having a fourth angle with the rigid skeleton (2), the difference between the angle of the third angle and the angle of the fourth angle being smaller than a set value.

9. A sealing arrangement according to claim 7, wherein the inner diameter of the first annular pointed projection (41) is smaller than the inner diameter of the second annular pointed projection (6), and the difference between the inner diameter of the first annular pointed projection (41) and the inner diameter of the second annular pointed projection (6) is in the range 0.3mm to 0.6 mm.

10. An image acquisition apparatus, characterized in that the image acquisition apparatus comprises a camera, a rotating shaft (1) connected with the camera, and a sealing device according to any one of claims 1 to 9, which is sleeved on the rotating shaft (1).

Images