WO2022267242A1

WO2022267242A1 - Photosensitivity-based bearing sealing assembly method and structure

Info

Publication number: WO2022267242A1
Application number: PCT/CN2021/118715
Authority: WO
Inventors: 殷予刚
Original assignee: 人本股份有限公司
Priority date: 2021-06-23
Filing date: 2021-09-16
Publication date: 2022-12-29
Also published as: CN113446319B; CN113446319A

Abstract

A photosensitivity-based bearing sealing assembly method and structure. The method comprises the following steps: S1. obtaining a semi-finished bearing to be sealed; S2. acquiring the specifications and size of a sealing element (1) for the semi-finished bearing; S3. obtaining a photosensitive resin; S4. using the photosensitive resin as a printing material, and obtaining the sealing element (1) by means of 3D printing; S5. fitting the semi-finished bearing with the sealing element (1), which is not completely hardened; and S6. irradiating the sealing element (1), which is completely hardened, by means of ultraviolet light.

Description

Photosensitive-based bearing seal assembly method and structure

technical field

The invention relates to the technical field of mechanical engineering, in particular to a bearing sealing method and structure based on the photosensitive principle of sealing assembly.

Background technique

In order to achieve dustproof effect in the existing bearing assembly, stamped steel plate dustproof cover is used in many cases, such as the utility model patent disclosed in the existing document with the Chinese patent application number CN201721818244. The cold-rolled steel plate is stamped and formed at one time, and assembled with the sealing groove on the outer ring of the bearing. This assembly method has a certain sealing effect and can reduce the leakage of grease, but the effect is still not obvious enough, and the process requires stamping. The steel plate is reinforced on the outer ring. This reinforcement method is very unfriendly to subsequent small-scale sealing. Once the batch of bearings is sent to the next site and the order needs to be partially adjusted, there will be a return to the factory for rework and serious delays. If the situation can be conveniently processed directly at the receiving site, it can speed up the adjustment and speed up the order efficiency.

Moreover, the sealing effect of the existing dust-proof scheme is not good. If a sealing ring is used, the existing sealing ring generally adopts a contact rubber ring. The supporting effect of this type of sealing ring is insufficient, and the strength is not enough. Effect.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a photosensitive-based bearing seal assembly method and structure, which can adopt relatively convenient and quick processing, provide a sealing solution with high support strength and good sealing effect, and also provide A sealing assembly method different from the prior art can adapt to more actual working conditions.

To achieve the above object, the present invention provides the following technical solutions:

A photosensitive bearing seal assembly method, the method includes the following steps:

S1. Obtain the specifications and dimensions of the semi-finished bearings to be sealed and their seals;

S2. Use photosensitive resin as the printing material, and obtain the seal through 3D printing;

S3. Assembling an incompletely hardened seal to the semi-finished bearing;

S4. Complete hardening of the seal by UV irradiation.

As a further improvement of the present invention, wherein step S3 includes

S3-1. Filling the unhardened or fully hardened seal with a skeleton;

S3-2. UV irradiation until partially hardened;

S3-3. Assemble the incompletely hardened seal.

As a further improvement of the present invention, the skeleton in step S3-1 adopts memory metal, and the transformation temperature of the memory metal is 10-50°C.

As a further improvement of the present invention, step S3-1 also fills the unhardened seal with magnetic material, and the magnetic material is located on the side of the seal facing away from the bearing.

As a further improvement of the present invention, the skeleton can cooperate with the magnetic material to generate mutual attraction.

The invention also provides the following technical solution: based on the photosensitive bearing sealing structure, the sealing part of the structure is made of photosensitive resin.

As a further improvement of the present invention, both sides of the outer diameter and inner diameter of the seal in the sealing structure have sealing lips, and the positions corresponding to the sealing lips on the outer ring and the inner ring of the assembled bearing are provided with installation grooves for installing the sealing lips ; The frame in the sealing structure is made of memory metal, and it is stretched at 10-50°C; when the frame is stretched, the sealing lip is embedded in the installation groove.

As a further improvement of the present invention, a circlip is provided in the installation groove, the sectional surface of the sealing lip is fork-shaped, and the position of the circlip corresponds to the bifurcation position of the sealing lip; the circlip faces toward the seal The ring surface of the lip is provided with a protrusion matching the bifurcated shape of the sealing lip; the side of the protrusion facing the inside of the bearing is provided with a wedge-shaped annular groove, which is opened along the circumferential direction of the circlip, and the wedge-shaped annular groove The wedge angle is formed by extending from the inner side of the bearing obliquely towards the inner diameter side of the circlip.

As a further improvement of the present invention, an annular baffle is attached to the side of the sealing lip facing the roller.

Beneficial effects of the present invention:

1. The material occupies a small space and is easy to transport;

2. The production specification and size can be changed at any time according to the setting;

3. Low requirements on equipment, easy to deploy;

4. Good sealing effect and supporting effect;

5. It can provide a new production scheme different from the existing technology, and improve the diversity of production.

Description of drawings

Fig. 1 is a schematic flow chart of the method of the present invention;

Fig. 2 is the schematic flow chart of the method of another embodiment of the present invention;

Fig. 3 is a schematic diagram of a cross-sectional structure of a bearing of the present invention;

Fig. 4 is the enlarged view of part A in Fig. 3 of the present invention;

Fig. 5 is a schematic structural diagram of a seal with a magnetic material structure according to the present invention.

Reference numerals: 1, seal; 2, sealing lip; 3, installation groove; 4, skeleton; 5, magnet; 6, cover plate; 7, collecting tank; 8, retaining spring; 9, protrusion; 10, ring Groove; 11, annular retaining piece.

detailed description

The present invention will be described in further detail below in conjunction with the embodiments given in the accompanying drawings.

Referring to Figure 1-5,

Example 1,

Referring to Figure 1, based on the photosensitive bearing seal assembly method, the method includes the following steps:

S3. Assembling an incompletely hardened seal to the semi-finished bearing;

S4. Complete hardening of the seal by UV irradiation.

Wherein, the semi-finished bearings mentioned in step S1 include bearings that need to be sealed by this solution, for example, bearings that need to be reworked for sealing, and bearings that need to be directly sealed by this solution; the bearings can be various types of bearings. Since the specification of the bearing is generally clear, the specification and size of the seal can be obtained directly according to the batch or model of the semi-finished product. Therefore, the specification and size can be directly set according to the daily needs, and there is no need to reset the seal every time. entry.

The seal material used in this solution is photosensitive resin, which can be combined with 3D printing equipment to obtain basic seals through printing. The printing effect is fast and effective. Compared with the steel sheet or rubber ring used in the prior art, this solution The material used is liquid, takes up less space, and is easy to transport. In addition, seals of different specifications can be directly changed by printing without using raw materials of different specifications. The requirements for equipment are also low, which is convenient to equip equipment at each branch point of the factory, and can produce good benefits for small batch adjustment or production. Since the material used is a photosensitive resin, the material can be gradually hardened under ultraviolet radiation until it is completely hardened into shape.

In the assembly process, the printed seal is taken out, and it is not completely hardened at this time. In small-scale production, manual assembly can be used. This assembly method is simple and convenient. After assembly, it enters the stage of ultraviolet irradiation. Allows the seal to fully harden to seal. Of course, according to the needs of those skilled in the art, the sealing member can also be sheathed with a rubber layer, etc. The specific selection can be made by those skilled in the art in combination with common knowledge. Compared with the stamping process in the prior art, it reduces the demand for equipment and is convenient for small-scale production. Compared with the sealing method using rubber rings, it has better hardness and certain protective effect.

Example 2

As shown in Figure 2, the optimization is carried out for Embodiment 1, as follows: before assembling the seal to the semi-finished bearing, the skeleton is filled into the unhardened or fully hardened seal. At this time, because the seal has certain plasticity, The skeleton can be filled into the seal, which is more convenient and can be done manually or with equipment. In order to facilitate operation, when setting the specifications of the seal, a groove for filling the skeleton can also be provided on the seal, and the groove can be printed out by printing, making it more convenient to fill the skeleton. After the framework is assembled, wait for the groove to adapt to the framework, and then irradiate with ultraviolet rays. At this time, the seal is partially hardened to have a certain hardness, so that the seal will not be deformed when it is installed into the bearing. Finally the partially hardened seal is installed into the bearing.

Example 3

For the optimization of the skeleton in Example 2, in order to further facilitate installation, by setting the skeleton as a memory metal and by selecting a specific transformation temperature, the skeleton can support the seal in the seal and cooperate with the seal. Deformation occurs in the incompletely hardened state. Specifically, the transformation temperature can be selected from 10 to 50°C. When the bearing is in a long-term working state, a certain temperature will be generated, and this temperature will be transmitted to the skeleton. At this time, the skeleton will have a certain temperature fluctuation. The metamorphosis temperature positioning of 10-50°C means that in this temperature range, the skeleton is in an unfolded state and can support the seal. When the temperature exceeds this range, the skeleton will deform and then shrink. With the help of this deformation, it can be convenient The assembly of the skeleton and the seal can also realize that after the seal and the bearing are installed in place, the skeleton can be expanded through the abnormal temperature, and then the seal can be supported and reinforced, so that the seal and the bearing can be assembled more tightly. The upper limit is set at 50°C, which is convenient for the skeleton to deform under natural cooling, and the lower limit is set at 10°C, which is convenient for selecting the type of memory metal, and can also meet the normal temperature of the bearing in the working state and avoid high temperature in the working state of the bearing lead to contraction of the skeleton.

Example 4

Referring to FIG. 2 , as another improvement of Embodiment 2, the unhardened seal is filled with magnetic material, and the magnetic material is located on the side of the seal facing away from the bearing.

Since there is a lot of metal dust in the dust, and in the case of using bearings, metal friction is also likely to occur and metal dust appears. At this time, in order to further improve the dust-proof effect, it can be directly attracted by magnetic materials, before the metal dust interferes. , Preemptively adsorb the metal dust on the seal.

More specifically, the framework in this solution can also cooperate with magnetic materials, and the two attract each other, which can make the installation of the two closer and reduce the impact of vibration.

Example 5

Referring to Fig. 3, this embodiment is a sealing structure, which is based on a photosensitive bearing sealing structure; this structure mainly uses a specific seal 1, and this seal 1 is obtained through the above-mentioned embodiments 1-4. The method is implemented, and this implementation mode is to adopt the scheme of Examples 1-4 to produce the sealing member 1. The main point is that the sealing member 1 uses photosensitive resin.

Example 6

Based on the improved scheme of Example 5, this scheme adopts the framework 4 in the above method scheme using memory metal and the setting of the corresponding strain state temperature. In addition, a matching modification has been made to the outer ring and the inner ring of the bearing. Based on this modification, the solution of this embodiment is more suitable for mass production. The specific changes are as follows, the seal 1 has a sealing lip 2 on both sides of the outer diameter and inner diameter, and the outer ring and the inner ring of the assembled bearing are provided with a mounting groove 3 for installing the sealing lip 2 at the position corresponding to the sealing lip 2 .

Based on the improvement of this embodiment, the additional sealing lip 2 can form a sealing fit with the outer ring and inner ring of the bearing when the memory metal is unfolded, and cooperate with the setting of the installation groove 3 to allow the sealing lip 2 to extend when the memory metal is unfolded. into the installation groove 3, thereby enhancing the assembly effect. In addition, the sectional surface of the mounting groove 3 in this embodiment can be a conventional rectangle, trapezoid, circular arc, etc. FIG. The setting of the sealing lip 2 can be in the form of arranging a rubber sleeve outside the sealing member 1 , or directly in the form of being integrally formed with the sealing member 1 .

Example 7

Referring to Fig. 5, this embodiment is based on the solution of embodiment 6, and the magnetic material design in the method solution is also adopted, specifically: the seal 1 is provided with a groove for embedding a magnetic material, and the magnetic material adopts a magnet 5, The notch position of the groove is provided with a cover plate 6, the cover plate 6 is integrated with the seal 1 by 3D printing; the seal 1 is provided with a collection groove 7 along the circumference of the groove, and the collection groove 7 Located within the magnetic attraction range of the magnet 5.

In this embodiment, the magnet 5 is assembled with the groove, and the selection of the magnetic material is relatively simple. Cover plate 6 is set at the position of the notch, because the assembly of magnet 5 is in the unhardened sealing member 1, now cover plate 6 is not fully hardened, after magnet 5 is installed, by pressing cover plate 6 can let The cover plate 6 covers the magnet 5 and can fasten the magnet 5 after hardening. The cover plate 6 and the sealing member 1 are integrally arranged to facilitate production, and are printed and formed at one time by means of printing. And the designed collection tank 7 can hold the dust and improve the upper limit of dust reception.

Example 8

This embodiment has also made changes to Embodiment 6, specifically as follows: a snap spring 8 is arranged in the installation groove 3, and the shape of the truncated surface of the sealing lip 2 is changed to a fork shape at the same time, and the position of the sealing lip 2 and the snap spring 8 is Cooperate, the position of the circlip 8 is located at the bifurcation of the fork-shaped position of the sealing lip 2, which means that the circlip 8 will be embedded in the bifurcation of the fork-shaped position of the sealing lip 2. A protrusion 9 is also provided at the position where the snap ring 8 cooperates with the sealing lip 2, and the protrusion 9 is matched with the bifurcated part of the sealing lip 2 and can be attached to each other to provide a good sealing effect. In addition, a wedge-shaped annular groove 10 is also designed, the wedge-shaped as shown in Figures 4 and 5, the wedge-shaped angle in the truncated surface is inclined from one side inside the bearing to extend toward the side of the inner diameter of the retaining spring 8, which constitutes a The slope used for oil throwing, when the outer ring rotates, can let the grease that seeps slightly into the wedge-shaped space be thrown back to the inside of the bearing along the wedge-shaped slope under centrifugal action based on the sealing effect, so as to reduce grease leakage. To be precise, the angle bisector of the wedge angle mentioned in this embodiment forms an acute angle with the central line of the protrusion, and the acute angle is between 15° and 60°.

Among them, the rotation matching method can be selected from the following two types. The first one is that the circlip 8 is rotatably connected with the outer ring or the inner ring, and the relatively tight connection between the sealing lip 2 and the circlip 8 is in the outer ring. When there is relative rotation with the seal 1 , the rotation is performed by the snap spring 8 . The second is that the circlip 8 is relatively fixed to the outer ring or the inner ring, and the sealing lip 2 and the circlip 8 are in rotatable contact. At this time, when the outer ring rotates, the gap between the circlip 8 and the sealing lip 2 There will be relative rotation between them.

Example 9

With reference to Figures 4 and 5, the adjustments made to the above-mentioned embodiment 8, the adjustment adds an annular stopper 11, the annular stopper 11 is located between the roller and the snap ring 8, after the sealing lip 2 is bifurcated The side facing the rollers is located between the snap ring 8 and the ring stopper 11 , and is attached to the ring stopper 11 and the snap ring 8 .

Since the sealing lip 2 is bifurcated, it has branches at this time, and one of the branches extends between the jumper 8 and the ring stopper 11, and the clamping effect between the jumper 8 and the ring stopper 11 can further improve Sealing effect, and the annular blocking piece 11 can also be used to block the roller, and the circlip 8 indirectly provides support to the annular blocking piece 11, thereby improving the installation effect on the roller.

The above descriptions are only preferred implementations of the present invention, and the scope of protection of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the scope of protection of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

A photosensitive bearing seal assembly method is characterized in that the method comprises the following steps:

S1. Obtain the specifications and dimensions of the semi-finished bearing and its seal (1) to be sealed;

S2. Using a photosensitive resin as a printing material to obtain a seal (1) through 3D printing;

S3. Assembling an incompletely hardened seal (1) to the semi-finished bearing;

S4. Complete hardening of the seal (1) by UV irradiation.
The bearing seal assembly method according to claim 1, wherein step S3 includes

S3-1. Filling the skeleton (4) into the unhardened or fully hardened seal (1);

S3-2. UV irradiation until partially hardened;

S3-3. Assemble the incompletely hardened seal (1).
The bearing seal assembly method according to claim 2, characterized in that the skeleton (4) in step S3-1 is made of memory metal, and the transformation temperature of the memory metal is 10-50°C.
The bearing seal assembly method according to claim 2, characterized in that, step S3-1 also fills the unhardened seal (1) with magnetic material, and the magnetic material is located on the seal (1) facing away from the bearing on one side.
The bearing sealing assembly method according to claim 4, characterized in that, the skeleton (4) can cooperate with magnetic materials to generate mutual attraction.
The photosensitive-based bearing sealing structure includes a bearing outer ring, a bearing inner ring, a roller installed between the bearing outer ring and the bearing inner ring, a seal (1) installed between the bearing outer ring and the bearing inner ring, and The feature is that the sealing member (1) is made of photosensitive resin.
The bearing sealing structure according to claim 6, characterized in that,

In this sealing structure, the seal (1) has a sealing lip (2) on both sides of the outer diameter and inner diameter, and the positions corresponding to the sealing lip (2) on the outer ring and the inner ring of the assembled bearing are provided for installing the sealing lip ( 2) the installation groove (3);

The frame (4) in the sealing structure is made of memory metal, and is stretched at 10-50°C; when the frame (4) is stretched, the sealing lip (2) is embedded in the installation groove (3).
The bearing seal structure according to claim 7, characterized in that, the seal (1) is provided with a groove for embedding a magnetic material, the magnetic material adopts a magnet (5), and the notch position of the groove is A cover plate (6) is provided, and the cover plate (6) is integrated with the seal (1) by 3D printing; the seal (1) is provided with a collection groove (7) along the circumference of the groove, and the collection The slot (7) is located within the magnetic attraction range of the magnet (5).
The bearing sealing structure according to claim 7 or 8, characterized in that, a clip spring (8) is arranged in the installation groove (3), the sectional surface of the sealing lip (2) is fork-shaped, and the clip The position of the spring (8) corresponds to the bifurcated position of the sealing lip (2); the annular surface of the circlip (8) facing the sealing lip (2) is provided with a protrusion matching the bifurcation shape of the sealing lip (2) (9); the protrusion (9) is provided with a wedge-shaped annular groove (10) on the side facing the inside of the bearing, and the annular groove (10) is opened along the circumferential direction of the snap ring (8), and the wedge-shaped annular groove ( 10) The wedge angle formed by it extends obliquely from one side inside the bearing toward the inner diameter side of the snap ring (8).
The bearing sealing structure according to claim 9, characterized in that, the side of the bifurcated part of the sealing lip (2) facing the roller is attached with an annular stopper (11).