Muddy-water-proof sealing rolling bearing

Abstract

The utility model discloses a muddy water prevention sealing rolling bearing which comprises an inner ring, an outer ring, a plurality of rolling bodies and a pair of sealing parts, and each sealing part comprises an outer diameter part embedded in a sealing groove; the inner diameter part slightly leans against the interior of the annular groove, the inner diameter part is provided with a contact type sealing inner lip obliquely facing the annular groove, a baffle extending towards the annular groove is obliquely arranged in the middle of the contact type sealing inner lip, and the inclination direction of the baffle is opposite to the inclination direction of the contact type sealing inner lip; and when the contact type sealing inner lip is extruded by the inclined surface on the inner side of the annular groove to deform and upwarp, the baffle is lightly contacted with the inclined surface on the outer side of the annular groove, and a sealed space is formed between the baffle and the bottom horizontal plane of the annular groove. According to the utility model, the baffle plate and the non-contact waterproof column are arranged, so that two defense lines are formed, muddy water immersion can be reliably prevented, and excellent sealing performance and starting torque are achieved.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to a mud- and water-resistant sealing rolling bearing. Background Technology

[0002] Due to the harsh construction environment, the components of processing equipment not only need to have good performance, but also need to have a high degree of environmental adaptability. There are higher requirements for improving the waterproof and dustproof properties of the components and extending their service life.

[0003] As research on the environmental adaptability of machine tool equipment continues to deepen, for bearings used in their internal components, sealing components that combine high sealing performance and low contact torque characteristics have become a key research focus in the industry in order to effectively prevent the intrusion of foreign objects such as mud, water, and dust, while extending the service life of the bearings.

[0004] In the prior art, the sealing component includes the following components: the outer diameter portion of the sealing component is fitted into the sealing groove on both sides of the outer ring track groove, and the inner diameter portion of the sealing component is set in the annular groove on both sides of the inner ring track groove, so that the inward sealing lip forms elastic contact with the inner sealing surface of the inner ring annular groove, thereby sealing the internal space of the bearing.

[0005] However, existing sealing components have the following problems: to prevent rainwater or mud from entering, the interference of the inward sealing lip is increased, leading to increased friction in the rolling bearing and affecting rotational speed and efficiency. Furthermore, when the outer ring rotates at high speed, the leading edge of the sealing lip cannot keep up with the axial position change of the sealing surface, thus failing to prevent the intrusion of mud, foreign matter, etc. Summary of the Invention

[0006] According to an embodiment of this utility model, a mud-proof sealing rolling bearing is provided, comprising an inner ring, an outer ring, multiple rolling elements, and a pair of sealing components. The multiple rolling elements are disposed between the inner and outer rings, supporting the inner and outer rings and enabling them to rotate relative to each other. The inner diameter surface of the outer ring has a pair of sealing grooves, which are disposed on both sides of the multiple rolling elements. The outer diameter surface of the inner ring has a pair of annular grooves, which correspond one-to-one with the pair of sealing grooves. Each pair of sealing grooves and its corresponding pair of annular grooves forms a sealing pair. A pair of sealing components are respectively installed within the sealing pair. Each sealing component includes:

[0007] The outer diameter portion is fitted into the sealing groove;

[0008] The inner diameter portion rests slightly against the annular groove. The inner diameter portion is provided with a contact-type sealing inner lip that is inclined toward the annular groove. A baffle extending toward the annular groove is inclined in the middle of the contact-type sealing inner lip. The inclination direction of the baffle is opposite to the inclination direction of the contact-type sealing inner lip.

[0009] When the inner lip of the contact seal is deformed and lifted by the inner inclined surface of the annular groove, the baffle makes light contact with the outer inclined surface of the annular groove, and a sealing space is formed between the baffle and the bottom horizontal surface of the annular groove.

[0010] Furthermore, a non-contact waterproof column is provided on the outer side of the inner diameter section, and the non-contact waterproof column forms an anti-intrusion gap with the protrusion on the outer edge of the inner ring end.

[0011] Furthermore, the ends of the baffle are rounded.

[0012] Furthermore, the contact-sealed inner lip and the baffle form a herringbone shape.

[0013] Furthermore, the angle of the inner lip of the contact seal is 18°~22°.

[0014] Furthermore, the sealing component also includes a main body that connects the inner diameter portion and the outer diameter portion, and the main body extends continuously along the circumference of the outer ring.

[0015] Furthermore, the sealing component also includes a reinforcing part that connects the outer diameter part and the main body part, and the reinforcing part is disposed between the main body part and the rolling element.

[0016] According to the embodiments of the present invention, the anti-mud and water-sealed rolling bearing forms two lines of defense by setting baffles and non-contact waterproof columns, which can reliably prevent mud and water from entering, and has excellent sealing performance and starting torque.

[0017] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of a mud-proof and water-sealed rolling bearing according to an embodiment of the present utility model;

[0019] Figure 2 This is a partially enlarged schematic diagram of the anti-mud and water-sealed rolling bearing according to an embodiment of the present invention.

[0020] Reference numerals: outer ring 1, inner ring 2, rolling element 3, outer ring track groove 11, inner ring track groove 21, sealing groove 12, annular groove 22, outer diameter part 4, inner diameter part 5, main body part 6, reinforcing part 7, contact sealing inner lip 51, baffle 52, non-contact waterproof column 53, sealing space 54, anti-intrusion gap 55. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0022] First, combine Figures 1-2The mud-proof and water-sealed rolling bearing according to the embodiments of this utility model is used in various mechanical equipment and has a wide range of applications.

[0023] like Figures 1-2 As shown, the mud-proof and water-resistant sealing rolling bearing of this embodiment includes: an outer ring 1; an inner ring 2 mounted inside the outer ring 1; rolling elements 3 supporting the outer ring 1 and inner ring 2 and enabling them to rotate freely relative to each other; a retainer (not shown in the figure) supporting the rolling elements 3; and a pair of sealing members that close the bearing space formed between the opposing surfaces of the outer ring 1 and the inner ring 2. An outer ring track groove 11 is formed on the inner diameter surface of the outer ring 1; a pair of sealing grooves 12 are formed on both sides of the outer ring track groove 11. On the other hand, an inner ring track groove 21 corresponding radially to the outer ring track groove 11 is formed on the outer diameter surface of the inner ring 2, and the rolling elements 3 are assembled between the inner ring track groove 21 and the outer ring track groove 11. Furthermore, a pair of annular grooves 22 are provided on the outer diameter surface of the inner ring 2 and on both sides of the inner ring track groove 21, and the inner side of each annular groove 22 is used as a sealing surface.

[0024] Specifically, such as Figures 1-2 As shown, in this embodiment, the sealing component includes: an outer diameter portion 4, which is fitted into the sealing groove 12; and an inner diameter portion 5, which slightly rests in the annular groove 22. The inner diameter portion 5 is provided with a contact-type sealing inner lip 51 that is inclined toward the annular groove 22. A baffle 52 extending toward the annular groove 22 is inclinedly provided in the middle of the contact-type sealing inner lip 51. The inclination direction of the baffle 52 is opposite to the inclination direction of the contact-type sealing inner lip 51, that is, the contact-type sealing inner lip 51 and the baffle 52 form a herringbone shape. When the contact-type sealing inner lip 51 is deformed and lifted by the inner inclined surface of the annular groove 22, the baffle 52 makes light contact with the outer inclined surface of the annular groove 22. A sealing space 54 is formed between the baffle 52 and the bottom horizontal surface of the annular groove 22, which further prevents foreign objects from entering. The inner lip 51 of the contact seal contacts the inner inclined surface of the annular groove 22 to form a primary seal. When the inner lip 51 of the seal is deformed, the baffle 52 makes light contact with the outer inclined surface of the annular groove 22 to form a secondary seal. The double seal achieves efficient prevention of mud and water intrusion. The light contact also takes into account the bearing's performance. Even without increasing the interference of the sealing components, the sealing performance of the bearing can be improved.

[0025] Furthermore, such as Figures 1-2 As shown, in this embodiment, a non-contact waterproof column 53 is provided on the outer side of the inner diameter portion 5. The non-contact waterproof column 53 and the protrusion on the outer edge of the inner ring 2 form an anti-intrusion gap 55. When subjected to mud and water erosion, the waterproof column 53 can block most of the mud and water, further improving the mud and water resistance performance.

[0026] Furthermore, such as Figures 1-2 As shown, in this embodiment, the end of the baffle 52 is arc-shaped to reduce frictional resistance, avoid stress concentration, and enhance sealing reliability.

[0027] Furthermore, such as Figures 1-2 As shown, in this embodiment, the upward deformation angle of the inner lip of the contact seal 51 is 18°~22°. The upward deformation angle of the inner lip of the contact seal 51 is the deformation angle formed between the upward-curved inner lip of the contact seal 51 and the vertical plane when the inner lip of the contact seal 51 is deformed and upward-curved by external force. This range of upward-curving angle has a significant impact on the sealing performance of the bearing: if the upward-curving angle is less than 18°, the gap between the baffle 52 and the outer inclined surface of the annular groove 22 will increase, causing gaps in the second line of defense against foreign object intrusion, weakening the sealing effect, and allowing mud, water, and dust to enter through the baffle 52. If the upward deformation angle of the inner lip of the seal 51 is greater than 22°, the opposite phenomenon will occur, resulting in excessive bearing starting torque, causing speed and efficiency losses. Therefore, in a preferred embodiment, this invention can control the upward deformation angle of the inner lip of the seal 51 within the range of 18°~22°.

[0028] When the upward deformation angle of the inner sealing lip 51 is controlled within the range of 18° to 22°, the outer inclined surface of the annular groove 22 makes slight contact with the baffle 52. Thus, when the inner ring 2 rotates at high speed, minimal friction is generated between the outer inclined surface of the annular groove 22 of the inner ring 2 and the baffle 52 on the inner sealing lip 51, preventing an increase in the bearing's starting torque. Furthermore, the contact between the baffle 52 and the outer inclined surface prevents mud and water from accumulating at the bottom of the annular groove 22 of the inner ring 2, avoiding the pumping adsorption effect caused by the rotation of the sealing components. Therefore, a sealed rolling bearing that reliably prevents mud and water ingress and possesses excellent sealing performance and starting torque can be obtained.

[0029] Furthermore, such as Figures 1-2 As shown, in this embodiment, the sealing component also includes a main body 6, which connects the inner diameter portion 5 and the outer diameter portion 4. The main body 6 extends continuously along the circumference of the outer ring 1 to form a 360° closed-loop seal. The main body 6 is integrally formed with the inner diameter portion 5 and the outer diameter portion 4.

[0030] Furthermore, such as Figures 1-2 As shown, in this embodiment, the sealing component also includes a reinforcing part 7, which connects the outer diameter part 4 and the main body part 6. The reinforcing part 7 is disposed between the main body part 6 and the rolling element 3. The reinforcing part 7 uses a sealing core plate for reinforcement and to improve stability.

[0031] Above, refer to Figures 1-2 The present invention describes a mud- and water-resistant sealing rolling bearing according to an embodiment of the present invention. By setting baffles and non-contact waterproof columns, two lines of defense are formed, which can reliably prevent mud and water from entering, and have both excellent sealing performance and starting torque.

[0032] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0033] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A mud-proof sealing rolling bearing, comprising an inner ring, an outer ring, a plurality of rolling elements, and a pair of sealing components, wherein the plurality of rolling elements are disposed between the inner ring and the outer ring, supporting the inner ring and the outer ring and enabling the inner ring and the outer ring to rotate relative to each other, the inner diameter surface of the outer ring is provided with a pair of sealing grooves, the pair of sealing grooves being disposed on both sides of the plurality of rolling elements, the outer diameter surface of the inner ring is provided with a pair of annular grooves, the pair of annular grooves being respectively disposed one-to-one with the pair of sealing grooves, the pair of sealing grooves and the corresponding pair of annular grooves forming a pair of sealing pairs, and the pair of sealing components being respectively installed in the pair of sealing pairs, characterized in that, The sealing component includes: The outer diameter portion is fitted into the sealing groove; The inner diameter portion slightly rests in the annular groove. The inner diameter portion is provided with a contact-type sealing inner lip that is inclined toward the annular groove. A baffle extending toward the annular groove is inclinedly provided in the middle of the contact-type sealing inner lip. The inclination direction of the baffle is opposite to the inclination direction of the contact-type sealing inner lip. When the inner lip of the contact seal is deformed and lifted by the inner inclined surface of the annular groove, the baffle makes light contact with the outer inclined surface of the annular groove, and a sealing space is formed between the baffle and the bottom horizontal surface of the annular groove.

2. The anti-mud and water-sealed rolling bearing as described in claim 1, characterized in that, A non-contact waterproof column is provided on the outer side of the inner diameter portion, and the non-contact waterproof column forms an anti-intrusion gap with the protrusion on the outer edge of the inner ring end.

3. The anti-mud and water-sealed rolling bearing as described in claim 1, characterized in that, The end of the baffle is arc-shaped.

4. The anti-mud and water-sealed rolling bearing as described in claim 1, characterized in that, The contact-type sealing inner lip and the baffle form a herringbone shape.

5. The anti-mud and water-sealed rolling bearing as described in claim 1, characterized in that, The angle at which the inner lip of the contact seal is deformed and upturned is 18°~22°.

6. The anti-mud and water-sealed rolling bearing according to any one of claims 1 to 5, characterized in that, The sealing component further includes a body portion that connects the inner diameter portion and the outer diameter portion, and the body portion extends continuously along the circumference of the outer ring.

7. The anti-mud and water-sealed rolling bearing as described in claim 6, characterized in that, The sealing component further includes a reinforcing portion that connects the outer diameter portion and the main body portion, and the reinforcing portion is disposed between the main body portion and the rolling element.

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